VLN-API integriert

assets/QGIS_P41_API_Layer_flaeche.qml

@@ -0,0 +1,597 @@
+<!DOCTYPE qgis PUBLIC 'http://mrcc.com/qgis.dtd' 'SYSTEM'>
+<qgis autoRefreshMode="Disabled" autoRefreshTime="0" readOnly="0" styleCategories="AllStyleCategories" simplifyLocal="1" symbologyReferenceScale="-1" minScale="100000000" maxScale="0" labelsEnabled="1" simplifyDrawingHints="1" version="3.40.7-Bratislava" simplifyAlgorithm="0" hasScaleBasedVisibilityFlag="0" simplifyMaxScale="1" simplifyDrawingTol="1">
+  <flags>
+    <Identifiable>1</Identifiable>
+    <Removable>1</Removable>
+    <Searchable>1</Searchable>
+    <Private>0</Private>
+  </flags>
+  <temporal enabled="0" limitMode="0" startField="" mode="0" durationField="Anzahl" endField="" endExpression="" durationUnit="min" fixedDuration="0" accumulate="0" startExpression="">
+    <fixedRange>
+      <start></start>
+      <end></end>
+    </fixedRange>
+  </temporal>
+  <elevation zscale="1" type="IndividualFeatures" symbology="Line" respectLayerSymbol="1" extrusionEnabled="0" clamping="Terrain" showMarkerSymbolInSurfacePlots="0" extrusion="0" zoffset="0" binding="Centroid">
+    <data-defined-properties>
+      <Option type="Map">
+        <Option type="QString" name="name" value=""/>
+        <Option name="properties"/>
+        <Option type="QString" name="type" value="collection"/>
+      </Option>
+    </data-defined-properties>
+    <profileLineSymbol>
+      <symbol alpha="1" type="line" name="" force_rhr="0" clip_to_extent="1" is_animated="0" frame_rate="10">
+        <data_defined_properties>
+          <Option type="Map">
+            <Option type="QString" name="name" value=""/>
+            <Option name="properties"/>
+            <Option type="QString" name="type" value="collection"/>
+          </Option>
+        </data_defined_properties>
+        <layer enabled="1" id="{806bb2f8-e515-41c5-931f-aa961a636da4}" locked="0" class="SimpleLine" pass="0">
+          <Option type="Map">
+            <Option type="QString" name="align_dash_pattern" value="0"/>
+            <Option type="QString" name="capstyle" value="square"/>
+            <Option type="QString" name="customdash" value="5;2"/>
+            <Option type="QString" name="customdash_map_unit_scale" value="3x:0,0,0,0,0,0"/>
+            <Option type="QString" name="customdash_unit" value="MM"/>
+            <Option type="QString" name="dash_pattern_offset" value="0"/>
+            <Option type="QString" name="dash_pattern_offset_map_unit_scale" value="3x:0,0,0,0,0,0"/>
+            <Option type="QString" name="dash_pattern_offset_unit" value="MM"/>
+            <Option type="QString" name="draw_inside_polygon" value="0"/>
+            <Option type="QString" name="joinstyle" value="bevel"/>
+            <Option type="QString" name="line_color" value="231,113,72,255,rgb:0.90588235294117647,0.44313725490196076,0.28235294117647058,1"/>
+            <Option type="QString" name="line_style" value="solid"/>
+            <Option type="QString" name="line_width" value="0.6"/>
+            <Option type="QString" name="line_width_unit" value="MM"/>
+            <Option type="QString" name="offset" value="0"/>
+            <Option type="QString" name="offset_map_unit_scale" value="3x:0,0,0,0,0,0"/>
+            <Option type="QString" name="offset_unit" value="MM"/>
+            <Option type="QString" name="ring_filter" value="0"/>
+            <Option type="QString" name="trim_distance_end" value="0"/>
+            <Option type="QString" name="trim_distance_end_map_unit_scale" value="3x:0,0,0,0,0,0"/>
+            <Option type="QString" name="trim_distance_end_unit" value="MM"/>
+            <Option type="QString" name="trim_distance_start" value="0"/>
+            <Option type="QString" name="trim_distance_start_map_unit_scale" value="3x:0,0,0,0,0,0"/>
+            <Option type="QString" name="trim_distance_start_unit" value="MM"/>
+            <Option type="QString" name="tweak_dash_pattern_on_corners" value="0"/>
+            <Option type="QString" name="use_custom_dash" value="0"/>
+            <Option type="QString" name="width_map_unit_scale" value="3x:0,0,0,0,0,0"/>
+          </Option>
+          <data_defined_properties>
+            <Option type="Map">
+              <Option type="QString" name="name" value=""/>
+              <Option name="properties"/>
+              <Option type="QString" name="type" value="collection"/>
+            </Option>
+          </data_defined_properties>
+        </layer>
+      </symbol>
+    </profileLineSymbol>
+    <profileFillSymbol>
+      <symbol alpha="1" type="fill" name="" force_rhr="0" clip_to_extent="1" is_animated="0" frame_rate="10">
+        <data_defined_properties>
+          <Option type="Map">
+            <Option type="QString" name="name" value=""/>
+            <Option name="properties"/>
+            <Option type="QString" name="type" value="collection"/>
+          </Option>
+        </data_defined_properties>
+        <layer enabled="1" id="{5fceef15-676f-4c5c-bb67-84e236dc3eab}" locked="0" class="SimpleFill" pass="0">
+          <Option type="Map">
+            <Option type="QString" name="border_width_map_unit_scale" value="3x:0,0,0,0,0,0"/>
+            <Option type="QString" name="color" value="231,113,72,255,rgb:0.90588235294117647,0.44313725490196076,0.28235294117647058,1"/>
+            <Option type="QString" name="joinstyle" value="bevel"/>
+            <Option type="QString" name="offset" value="0,0"/>
+            <Option type="QString" name="offset_map_unit_scale" value="3x:0,0,0,0,0,0"/>
+            <Option type="QString" name="offset_unit" value="MM"/>
+            <Option type="QString" name="outline_color" value="165,81,51,255,rgb:0.6470588235294118,0.31651789120317386,0.20167849240863661,1"/>
+            <Option type="QString" name="outline_style" value="solid"/>
+            <Option type="QString" name="outline_width" value="0.2"/>
+            <Option type="QString" name="outline_width_unit" value="MM"/>
+            <Option type="QString" name="style" value="solid"/>
+          </Option>
+          <data_defined_properties>
+            <Option type="Map">
+              <Option type="QString" name="name" value=""/>
+              <Option name="properties"/>
+              <Option type="QString" name="type" value="collection"/>
+            </Option>
+          </data_defined_properties>
+        </layer>
+      </symbol>
+    </profileFillSymbol>
+    <profileMarkerSymbol>
+      <symbol alpha="1" type="marker" name="" force_rhr="0" clip_to_extent="1" is_animated="0" frame_rate="10">
+        <data_defined_properties>
+          <Option type="Map">
+            <Option type="QString" name="name" value=""/>
+            <Option name="properties"/>
+            <Option type="QString" name="type" value="collection"/>
+          </Option>
+        </data_defined_properties>
+        <layer enabled="1" id="{6c4ff12c-7cf1-4ddc-a6e1-b7f01dda66ad}" locked="0" class="SimpleMarker" pass="0">
+          <Option type="Map">
+            <Option type="QString" name="angle" value="0"/>
+            <Option type="QString" name="cap_style" value="square"/>
+            <Option type="QString" name="color" value="231,113,72,255,rgb:0.90588235294117647,0.44313725490196076,0.28235294117647058,1"/>
+            <Option type="QString" name="horizontal_anchor_point" value="1"/>
+            <Option type="QString" name="joinstyle" value="bevel"/>
+            <Option type="QString" name="name" value="diamond"/>
+            <Option type="QString" name="offset" value="0,0"/>
+            <Option type="QString" name="offset_map_unit_scale" value="3x:0,0,0,0,0,0"/>
+            <Option type="QString" name="offset_unit" value="MM"/>
+            <Option type="QString" name="outline_color" value="165,81,51,255,rgb:0.6470588235294118,0.31651789120317386,0.20167849240863661,1"/>
+            <Option type="QString" name="outline_style" value="solid"/>
+            <Option type="QString" name="outline_width" value="0.2"/>
+            <Option type="QString" name="outline_width_map_unit_scale" value="3x:0,0,0,0,0,0"/>
+            <Option type="QString" name="outline_width_unit" value="MM"/>
+            <Option type="QString" name="scale_method" value="diameter"/>
+            <Option type="QString" name="size" value="3"/>
+            <Option type="QString" name="size_map_unit_scale" value="3x:0,0,0,0,0,0"/>
+            <Option type="QString" name="size_unit" value="MM"/>
+            <Option type="QString" name="vertical_anchor_point" value="1"/>
+          </Option>
+          <data_defined_properties>
+            <Option type="Map">
+              <Option type="QString" name="name" value=""/>
+              <Option name="properties"/>
+              <Option type="QString" name="type" value="collection"/>
+            </Option>
+          </data_defined_properties>
+        </layer>
+      </symbol>
+    </profileMarkerSymbol>
+  </elevation>
+  <renderer-v2 referencescale="-1" type="singleSymbol" forceraster="0" enableorderby="0" symbollevels="0">
+    <symbols>
+      <symbol alpha="1" type="fill" name="0" force_rhr="0" clip_to_extent="1" is_animated="0" frame_rate="10">
+        <data_defined_properties>
+          <Option type="Map">
+            <Option type="QString" name="name" value=""/>
+            <Option name="properties"/>
+            <Option type="QString" name="type" value="collection"/>
+          </Option>
+        </data_defined_properties>
+        <layer enabled="1" id="{37953f01-68d9-43be-b9d8-546ca454487e}" locked="0" class="SimpleFill" pass="0">
+          <Option type="Map">
+            <Option type="QString" name="border_width_map_unit_scale" value="3x:0,0,0,0,0,0"/>
+            <Option type="QString" name="color" value="0,85,255,255,rgb:0,0.33333333333333331,1,1"/>
+            <Option type="QString" name="joinstyle" value="bevel"/>
+            <Option type="QString" name="offset" value="0,0"/>
+            <Option type="QString" name="offset_map_unit_scale" value="3x:0,0,0,0,0,0"/>
+            <Option type="QString" name="offset_unit" value="MM"/>
+            <Option type="QString" name="outline_color" value="0,85,255,255,rgb:0,0.33333333333333331,1,1"/>
+            <Option type="QString" name="outline_style" value="solid"/>
+            <Option type="QString" name="outline_width" value="1.06"/>
+            <Option type="QString" name="outline_width_unit" value="MM"/>
+            <Option type="QString" name="style" value="no"/>
+          </Option>
+          <data_defined_properties>
+            <Option type="Map">
+              <Option type="QString" name="name" value=""/>
+              <Option name="properties"/>
+              <Option type="QString" name="type" value="collection"/>
+            </Option>
+          </data_defined_properties>
+        </layer>
+      </symbol>
+    </symbols>
+    <rotation/>
+    <sizescale/>
+    <data-defined-properties>
+      <Option type="Map">
+        <Option type="QString" name="name" value=""/>
+        <Option name="properties"/>
+        <Option type="QString" name="type" value="collection"/>
+      </Option>
+    </data-defined-properties>
+  </renderer-v2>
+  <selection mode="Default">
+    <selectionColor invalid="1"/>
+    <selectionSymbol>
+      <symbol alpha="1" type="fill" name="" force_rhr="0" clip_to_extent="1" is_animated="0" frame_rate="10">
+        <data_defined_properties>
+          <Option type="Map">
+            <Option type="QString" name="name" value=""/>
+            <Option name="properties"/>
+            <Option type="QString" name="type" value="collection"/>
+          </Option>
+        </data_defined_properties>
+        <layer enabled="1" id="{37c84ab2-1f8e-4d9f-90bb-400976543063}" locked="0" class="SimpleFill" pass="0">
+          <Option type="Map">
+            <Option type="QString" name="border_width_map_unit_scale" value="3x:0,0,0,0,0,0"/>
+            <Option type="QString" name="color" value="0,0,255,255,rgb:0,0,1,1"/>
+            <Option type="QString" name="joinstyle" value="bevel"/>
+            <Option type="QString" name="offset" value="0,0"/>
+            <Option type="QString" name="offset_map_unit_scale" value="3x:0,0,0,0,0,0"/>
+            <Option type="QString" name="offset_unit" value="MM"/>
+            <Option type="QString" name="outline_color" value="35,35,35,255,rgb:0.13725490196078433,0.13725490196078433,0.13725490196078433,1"/>
+            <Option type="QString" name="outline_style" value="solid"/>
+            <Option type="QString" name="outline_width" value="0.26"/>
+            <Option type="QString" name="outline_width_unit" value="MM"/>
+            <Option type="QString" name="style" value="solid"/>
+          </Option>
+          <data_defined_properties>
+            <Option type="Map">
+              <Option type="QString" name="name" value=""/>
+              <Option name="properties"/>
+              <Option type="QString" name="type" value="collection"/>
+            </Option>
+          </data_defined_properties>
+        </layer>
+      </symbol>
+    </selectionSymbol>
+  </selection>
+  <labeling type="rule-based">
+    <rules key="{31adca09-e30f-437a-bc70-ef63b20670ed}">
+      <rule filter="left(&quot;MKZ&quot;,3)='222'" key="{79a5bb52-55b4-45ee-89fe-d90e0fe95f62}" description="Wege,geplant">
+        <settings calloutType="simple">
+          <text-style fontKerning="0" useSubstitutions="0" namedStyle="Bold" previewBkgrdColor="255,255,255,255,rgb:1,1,1,1" fontWeight="75" tabStopDistanceMapUnitScale="3x:0,0,0,0,0,0" fontUnderline="0" tabStopDistance="80" fieldName="left(&quot;MKZ&quot;,3)|| '\n'  || '―'|| '\n' || right(&quot;MKZ&quot;,4)" textColor="5,125,180,255,rgb:0.0196078431372549,0.49019607843137253,0.70588235294117652,1" fontStrikeout="0" forcedBold="0" forcedItalic="0" allowHtml="0" multilineHeight="0.59999999999999998" fontSize="10" fontWordSpacing="-0.6875" stretchFactor="100" blendMode="0" fontSizeMapUnitScale="3x:0,0,0,0,0,0" textOrientation="horizontal" fontItalic="0" fontLetterSpacing="-0.5625" tabStopDistanceUnit="Point" multilineHeightUnit="Percentage" fontFamily="Arial" fontSizeUnit="Point" capitalization="0" isExpression="1" legendString="Aa" textOpacity="1">
+            <families/>
+            <text-buffer bufferColor="255,0,0,255,hsv:0,1,1,1" bufferNoFill="1" bufferSize="1" bufferSizeMapUnitScale="3x:0,0,0,0,0,0" bufferSizeUnits="MM" bufferDraw="0" bufferJoinStyle="128" bufferOpacity="1" bufferBlendMode="0"/>
+            <text-mask maskedSymbolLayers="" maskJoinStyle="128" maskEnabled="0" maskType="0" maskSize2="1.5" maskSizeUnits="MM" maskSizeMapUnitScale="3x:0,0,0,0,0,0" maskSize="1.5" maskOpacity="1"/>
+            <background shapeJoinStyle="64" shapeBlendMode="0" shapeRotationType="0" shapeRadiiX="0" shapeRadiiY="0" shapeSVGFile="" shapeSizeType="0" shapeBorderWidthMapUnitScale="3x:0,0,0,0,0,0" shapeSizeUnit="Point" shapeRadiiMapUnitScale="3x:0,0,0,0,0,0" shapeFillColor="255,255,255,255,rgb:1,1,1,1" shapeOffsetMapUnitScale="3x:0,0,0,0,0,0" shapeDraw="1" shapeRotation="0" shapeType="5" shapeSizeMapUnitScale="3x:0,0,0,0,0,0" shapeOffsetUnit="Point" shapeRadiiUnit="Point" shapeSizeX="3" shapeOpacity="1" shapeBorderWidth="0" shapeOffsetY="0" shapeBorderColor="128,128,128,255,rgb:0.50196078431372548,0.50196078431372548,0.50196078431372548,1" shapeBorderWidthUnit="Point" shapeSizeY="0" shapeOffsetX="0">
+              <symbol alpha="1" type="marker" name="markerSymbol" force_rhr="0" clip_to_extent="1" is_animated="0" frame_rate="10">
+                <data_defined_properties>
+                  <Option type="Map">
+                    <Option type="QString" name="name" value=""/>
+                    <Option name="properties"/>
+                    <Option type="QString" name="type" value="collection"/>
+                  </Option>
+                </data_defined_properties>
+                <layer enabled="1" id="" locked="0" class="SimpleMarker" pass="0">
+                  <Option type="Map">
+                    <Option type="QString" name="angle" value="0"/>
+                    <Option type="QString" name="cap_style" value="square"/>
+                    <Option type="QString" name="color" value="255,255,255,255,rgb:1,1,1,1"/>
+                    <Option type="QString" name="horizontal_anchor_point" value="1"/>
+                    <Option type="QString" name="joinstyle" value="bevel"/>
+                    <Option type="QString" name="name" value="circle"/>
+                    <Option type="QString" name="offset" value="0,0"/>
+                    <Option type="QString" name="offset_map_unit_scale" value="3x:0,0,0,0,0,0"/>
+                    <Option type="QString" name="offset_unit" value="MM"/>
+                    <Option type="QString" name="outline_color" value="8,135,203,255,rgb:0.03137254901960784,0.52941176470588236,0.79607843137254897,1"/>
+                    <Option type="QString" name="outline_style" value="solid"/>
+                    <Option type="QString" name="outline_width" value="0.6"/>
+                    <Option type="QString" name="outline_width_map_unit_scale" value="3x:0,0,0,0,0,0"/>
+                    <Option type="QString" name="outline_width_unit" value="MM"/>
+                    <Option type="QString" name="scale_method" value="diameter"/>
+                    <Option type="QString" name="size" value="2"/>
+                    <Option type="QString" name="size_map_unit_scale" value="3x:0,0,0,0,0,0"/>
+                    <Option type="QString" name="size_unit" value="MM"/>
+                    <Option type="QString" name="vertical_anchor_point" value="1"/>
+                  </Option>
+                  <data_defined_properties>
+                    <Option type="Map">
+                      <Option type="QString" name="name" value=""/>
+                      <Option name="properties"/>
+                      <Option type="QString" name="type" value="collection"/>
+                    </Option>
+                  </data_defined_properties>
+                </layer>
+              </symbol>
+              <symbol alpha="1" type="fill" name="fillSymbol" force_rhr="0" clip_to_extent="1" is_animated="0" frame_rate="10">
+                <data_defined_properties>
+                  <Option type="Map">
+                    <Option type="QString" name="name" value=""/>
+                    <Option name="properties"/>
+                    <Option type="QString" name="type" value="collection"/>
+                  </Option>
+                </data_defined_properties>
+                <layer enabled="1" id="" locked="0" class="SimpleFill" pass="0">
+                  <Option type="Map">
+                    <Option type="QString" name="border_width_map_unit_scale" value="3x:0,0,0,0,0,0"/>
+                    <Option type="QString" name="color" value="255,255,255,255,rgb:1,1,1,1"/>
+                    <Option type="QString" name="joinstyle" value="bevel"/>
+                    <Option type="QString" name="offset" value="0,0"/>
+                    <Option type="QString" name="offset_map_unit_scale" value="3x:0,0,0,0,0,0"/>
+                    <Option type="QString" name="offset_unit" value="MM"/>
+                    <Option type="QString" name="outline_color" value="128,128,128,255,rgb:0.50196078431372548,0.50196078431372548,0.50196078431372548,1"/>
+                    <Option type="QString" name="outline_style" value="no"/>
+                    <Option type="QString" name="outline_width" value="0"/>
+                    <Option type="QString" name="outline_width_unit" value="Point"/>
+                    <Option type="QString" name="style" value="solid"/>
+                  </Option>
+                  <data_defined_properties>
+                    <Option type="Map">
+                      <Option type="QString" name="name" value=""/>
+                      <Option name="properties"/>
+                      <Option type="QString" name="type" value="collection"/>
+                    </Option>
+                  </data_defined_properties>
+                </layer>
+              </symbol>
+            </background>
+            <shadow shadowOffsetAngle="135" shadowRadiusAlphaOnly="0" shadowUnder="0" shadowOffsetMapUnitScale="3x:0,0,0,0,0,0" shadowRadius="1.5" shadowOffsetDist="1" shadowScale="100" shadowColor="0,0,0,255,rgb:0,0,0,1" shadowOffsetUnit="MM" shadowRadiusUnit="MM" shadowBlendMode="6" shadowOpacity="0.69999999999999996" shadowDraw="0" shadowRadiusMapUnitScale="3x:0,0,0,0,0,0" shadowOffsetGlobal="1"/>
+            <dd_properties>
+              <Option type="Map">
+                <Option type="QString" name="name" value=""/>
+                <Option name="properties"/>
+                <Option type="QString" name="type" value="collection"/>
+              </Option>
+            </dd_properties>
+            <substitutions/>
+          </text-style>
+          <text-format useMaxLineLengthForAutoWrap="1" formatNumbers="0" leftDirectionSymbol="&lt;" rightDirectionSymbol=">" reverseDirectionSymbol="0" decimals="3" wrapChar="" autoWrapLength="0" placeDirectionSymbol="0" plussign="0" multilineAlign="1" addDirectionSymbol="0"/>
+          <placement placementFlags="14" placement="4" distUnits="MM" maximumDistance="0" fitInPolygonOnly="0" offsetUnits="MM" repeatDistance="0" geometryGeneratorEnabled="0" rotationUnit="AngleDegrees" lineAnchorTextPoint="CenterOfText" lineAnchorClipping="1" centroidWhole="0" priority="6" geometryGeneratorType="PointGeometry" prioritization="PreferCloser" repeatDistanceMapUnitScale="3x:0,0,0,0,0,0" overrunDistance="0" rotationAngle="0" quadOffset="4" dist="5" overlapHandling="PreventOverlap" offsetType="0" layerType="PolygonGeometry" repeatDistanceUnits="MM" predefinedPositionOrder="TR,TL,BR,BL,R,L,TSR,BSR" overrunDistanceMapUnitScale="3x:0,0,0,0,0,0" centroidInside="0" maximumDistanceUnit="MM" allowDegraded="0" maxCurvedCharAngleOut="-25" polygonPlacementFlags="3" labelOffsetMapUnitScale="3x:0,0,0,0,0,0" geometryGenerator="" lineAnchorType="0" lineAnchorPercent="0.5" xOffset="0" preserveRotation="0" maxCurvedCharAngleIn="25" overrunDistanceUnit="MM" yOffset="0" maximumDistanceMapUnitScale="3x:0,0,0,0,0,0" distMapUnitScale="3x:0,0,0,0,0,0"/>
+          <rendering obstacle="1" scaleVisibility="0" maxNumLabels="2000" drawLabels="1" labelPerPart="0" obstacleFactor="1.2" fontMinPixelSize="3" scaleMin="0" unplacedVisibility="0" zIndex="0" upsidedownLabels="0" fontLimitPixelSize="0" limitNumLabels="0" minFeatureSize="0" fontMaxPixelSize="10000" scaleMax="0" obstacleType="1" mergeLines="0"/>
+          <dd_properties>
+            <Option type="Map">
+              <Option type="QString" name="name" value=""/>
+              <Option name="properties"/>
+              <Option type="QString" name="type" value="collection"/>
+            </Option>
+          </dd_properties>
+          <callout type="simple">
+            <Option type="Map">
+              <Option type="QString" name="anchorPoint" value="pole_of_inaccessibility"/>
+              <Option type="int" name="blendMode" value="0"/>
+              <Option type="Map" name="ddProperties">
+                <Option type="QString" name="name" value=""/>
+                <Option name="properties"/>
+                <Option type="QString" name="type" value="collection"/>
+              </Option>
+              <Option type="bool" name="drawToAllParts" value="false"/>
+              <Option type="QString" name="enabled" value="0"/>
+              <Option type="QString" name="labelAnchorPoint" value="point_on_exterior"/>
+              <Option type="QString" name="lineSymbol" value="&lt;symbol alpha=&quot;1&quot; type=&quot;line&quot; name=&quot;symbol&quot; force_rhr=&quot;0&quot; clip_to_extent=&quot;1&quot; is_animated=&quot;0&quot; frame_rate=&quot;10&quot;>&lt;data_defined_properties>&lt;Option type=&quot;Map&quot;>&lt;Option type=&quot;QString&quot; name=&quot;name&quot; value=&quot;&quot;/>&lt;Option name=&quot;properties&quot;/>&lt;Option type=&quot;QString&quot; name=&quot;type&quot; value=&quot;collection&quot;/>&lt;/Option>&lt;/data_defined_properties>&lt;layer enabled=&quot;1&quot; id=&quot;{03dc8a93-2fef-4767-9787-e3607853696d}&quot; locked=&quot;0&quot; class=&quot;SimpleLine&quot; pass=&quot;0&quot;>&lt;Option type=&quot;Map&quot;>&lt;Option type=&quot;QString&quot; name=&quot;align_dash_pattern&quot; value=&quot;0&quot;/>&lt;Option type=&quot;QString&quot; name=&quot;capstyle&quot; value=&quot;square&quot;/>&lt;Option type=&quot;QString&quot; name=&quot;customdash&quot; value=&quot;5;2&quot;/>&lt;Option type=&quot;QString&quot; name=&quot;customdash_map_unit_scale&quot; value=&quot;3x:0,0,0,0,0,0&quot;/>&lt;Option type=&quot;QString&quot; name=&quot;customdash_unit&quot; value=&quot;MM&quot;/>&lt;Option type=&quot;QString&quot; name=&quot;dash_pattern_offset&quot; value=&quot;0&quot;/>&lt;Option type=&quot;QString&quot; name=&quot;dash_pattern_offset_map_unit_scale&quot; value=&quot;3x:0,0,0,0,0,0&quot;/>&lt;Option type=&quot;QString&quot; name=&quot;dash_pattern_offset_unit&quot; value=&quot;MM&quot;/>&lt;Option type=&quot;QString&quot; name=&quot;draw_inside_polygon&quot; value=&quot;0&quot;/>&lt;Option type=&quot;QString&quot; name=&quot;joinstyle&quot; value=&quot;bevel&quot;/>&lt;Option type=&quot;QString&quot; name=&quot;line_color&quot; value=&quot;60,60,60,255,rgb:0.23529411764705882,0.23529411764705882,0.23529411764705882,1&quot;/>&lt;Option type=&quot;QString&quot; name=&quot;line_style&quot; value=&quot;solid&quot;/>&lt;Option type=&quot;QString&quot; name=&quot;line_width&quot; value=&quot;0.3&quot;/>&lt;Option type=&quot;QString&quot; name=&quot;line_width_unit&quot; value=&quot;MM&quot;/>&lt;Option type=&quot;QString&quot; name=&quot;offset&quot; value=&quot;0&quot;/>&lt;Option type=&quot;QString&quot; name=&quot;offset_map_unit_scale&quot; value=&quot;3x:0,0,0,0,0,0&quot;/>&lt;Option type=&quot;QString&quot; name=&quot;offset_unit&quot; value=&quot;MM&quot;/>&lt;Option type=&quot;QString&quot; name=&quot;ring_filter&quot; value=&quot;0&quot;/>&lt;Option type=&quot;QString&quot; name=&quot;trim_distance_end&quot; value=&quot;0&quot;/>&lt;Option type=&quot;QString&quot; name=&quot;trim_distance_end_map_unit_scale&quot; value=&quot;3x:0,0,0,0,0,0&quot;/>&lt;Option type=&quot;QString&quot; name=&quot;trim_distance_end_unit&quot; value=&quot;MM&quot;/>&lt;Option type=&quot;QString&quot; name=&quot;trim_distance_start&quot; value=&quot;0&quot;/>&lt;Option type=&quot;QString&quot; name=&quot;trim_distance_start_map_unit_scale&quot; value=&quot;3x:0,0,0,0,0,0&quot;/>&lt;Option type=&quot;QString&quot; name=&quot;trim_distance_start_unit&quot; value=&quot;MM&quot;/>&lt;Option type=&quot;QString&quot; name=&quot;tweak_dash_pattern_on_corners&quot; value=&quot;0&quot;/>&lt;Option type=&quot;QString&quot; name=&quot;use_custom_dash&quot; value=&quot;0&quot;/>&lt;Option type=&quot;QString&quot; name=&quot;width_map_unit_scale&quot; value=&quot;3x:0,0,0,0,0,0&quot;/>&lt;/Option>&lt;data_defined_properties>&lt;Option type=&quot;Map&quot;>&lt;Option type=&quot;QString&quot; name=&quot;name&quot; value=&quot;&quot;/>&lt;Option name=&quot;properties&quot;/>&lt;Option type=&quot;QString&quot; name=&quot;type&quot; value=&quot;collection&quot;/>&lt;/Option>&lt;/data_defined_properties>&lt;/layer>&lt;/symbol>"/>
+              <Option type="double" name="minLength" value="0"/>
+              <Option type="QString" name="minLengthMapUnitScale" value="3x:0,0,0,0,0,0"/>
+              <Option type="QString" name="minLengthUnit" value="MM"/>
+              <Option type="double" name="offsetFromAnchor" value="0"/>
+              <Option type="QString" name="offsetFromAnchorMapUnitScale" value="3x:0,0,0,0,0,0"/>
+              <Option type="QString" name="offsetFromAnchorUnit" value="MM"/>
+              <Option type="double" name="offsetFromLabel" value="0"/>
+              <Option type="QString" name="offsetFromLabelMapUnitScale" value="3x:0,0,0,0,0,0"/>
+              <Option type="QString" name="offsetFromLabelUnit" value="MM"/>
+            </Option>
+          </callout>
+        </settings>
+      </rule>
+    </rules>
+  </labeling>
+  <customproperties>
+    <Option type="Map">
+      <Option type="List" name="dualview/previewExpressions">
+        <Option type="QString" value="&quot;NAME&quot;"/>
+      </Option>
+      <Option type="int" name="embeddedWidgets/count" value="0"/>
+      <Option type="QString" name="geopdf/groupName" value="Verfahren"/>
+      <Option name="variableNames"/>
+      <Option name="variableValues"/>
+      <Option type="QString" name="vln_karten/api_path" value="/maps/p41/27027"/>
+      <Option type="QString" name="vln_karten/dataset" value="p41"/>
+      <Option type="QString" name="vln_karten/verfahren" value="27027"/>
+    </Option>
+  </customproperties>
+  <blendMode>0</blendMode>
+  <featureBlendMode>0</featureBlendMode>
+  <layerOpacity>1</layerOpacity>
+  <geometryOptions removeDuplicateNodes="0" geometryPrecision="0">
+    <activeChecks/>
+    <checkConfiguration type="Map">
+      <Option type="Map" name="QgsGeometryGapCheck">
+        <Option type="double" name="allowedGapsBuffer" value="0"/>
+        <Option type="bool" name="allowedGapsEnabled" value="false"/>
+        <Option type="QString" name="allowedGapsLayer" value=""/>
+      </Option>
+    </checkConfiguration>
+  </geometryOptions>
+  <legend type="default-vector" showLabelLegend="0"/>
+  <referencedLayers/>
+  <fieldConfiguration>
+    <field name="Anzahl" configurationFlags="NoFlag">
+      <editWidget type="Range">
+        <config>
+          <Option/>
+        </config>
+      </editWidget>
+    </field>
+    <field name="Baumart" configurationFlags="NoFlag">
+      <editWidget type="TextEdit">
+        <config>
+          <Option/>
+        </config>
+      </editWidget>
+    </field>
+    <field name="Belag" configurationFlags="NoFlag">
+      <editWidget type="TextEdit">
+        <config>
+          <Option/>
+        </config>
+      </editWidget>
+    </field>
+    <field name="Fahrbahn" configurationFlags="NoFlag">
+      <editWidget type="TextEdit">
+        <config>
+          <Option/>
+        </config>
+      </editWidget>
+    </field>
+    <field name="Krone" configurationFlags="NoFlag">
+      <editWidget type="Range">
+        <config>
+          <Option/>
+        </config>
+      </editWidget>
+    </field>
+    <field name="MKZ" configurationFlags="NoFlag">
+      <editWidget type="TextEdit">
+        <config>
+          <Option/>
+        </config>
+      </editWidget>
+    </field>
+    <field name="NAME" configurationFlags="NoFlag">
+      <editWidget type="TextEdit">
+        <config>
+          <Option/>
+        </config>
+      </editWidget>
+    </field>
+    <field name="VKZ" configurationFlags="NoFlag">
+      <editWidget type="TextEdit">
+        <config>
+          <Option/>
+        </config>
+      </editWidget>
+    </field>
+    <field name="qm" configurationFlags="NoFlag">
+      <editWidget type="Range">
+        <config>
+          <Option/>
+        </config>
+      </editWidget>
+    </field>
+  </fieldConfiguration>
+  <aliases>
+    <alias name="" index="0" field="Anzahl"/>
+    <alias name="" index="1" field="Baumart"/>
+    <alias name="" index="2" field="Belag"/>
+    <alias name="" index="3" field="Fahrbahn"/>
+    <alias name="" index="4" field="Krone"/>
+    <alias name="" index="5" field="MKZ"/>
+    <alias name="" index="6" field="NAME"/>
+    <alias name="" index="7" field="VKZ"/>
+    <alias name="" index="8" field="qm"/>
+  </aliases>
+  <splitPolicies>
+    <policy policy="Duplicate" field="Anzahl"/>
+    <policy policy="Duplicate" field="Baumart"/>
+    <policy policy="Duplicate" field="Belag"/>
+    <policy policy="Duplicate" field="Fahrbahn"/>
+    <policy policy="Duplicate" field="Krone"/>
+    <policy policy="Duplicate" field="MKZ"/>
+    <policy policy="Duplicate" field="NAME"/>
+    <policy policy="Duplicate" field="VKZ"/>
+    <policy policy="Duplicate" field="qm"/>
+  </splitPolicies>
+  <duplicatePolicies>
+    <policy policy="Duplicate" field="Anzahl"/>
+    <policy policy="Duplicate" field="Baumart"/>
+    <policy policy="Duplicate" field="Belag"/>
+    <policy policy="Duplicate" field="Fahrbahn"/>
+    <policy policy="Duplicate" field="Krone"/>
+    <policy policy="Duplicate" field="MKZ"/>
+    <policy policy="Duplicate" field="NAME"/>
+    <policy policy="Duplicate" field="VKZ"/>
+    <policy policy="Duplicate" field="qm"/>
+  </duplicatePolicies>
+  <defaults>
+    <default expression="" applyOnUpdate="0" field="Anzahl"/>
+    <default expression="" applyOnUpdate="0" field="Baumart"/>
+    <default expression="" applyOnUpdate="0" field="Belag"/>
+    <default expression="" applyOnUpdate="0" field="Fahrbahn"/>
+    <default expression="" applyOnUpdate="0" field="Krone"/>
+    <default expression="" applyOnUpdate="0" field="MKZ"/>
+    <default expression="" applyOnUpdate="0" field="NAME"/>
+    <default expression="" applyOnUpdate="0" field="VKZ"/>
+    <default expression="" applyOnUpdate="0" field="qm"/>
+  </defaults>
+  <constraints>
+    <constraint exp_strength="0" notnull_strength="0" constraints="0" unique_strength="0" field="Anzahl"/>
+    <constraint exp_strength="0" notnull_strength="0" constraints="0" unique_strength="0" field="Baumart"/>
+    <constraint exp_strength="0" notnull_strength="0" constraints="0" unique_strength="0" field="Belag"/>
+    <constraint exp_strength="0" notnull_strength="0" constraints="0" unique_strength="0" field="Fahrbahn"/>
+    <constraint exp_strength="0" notnull_strength="0" constraints="0" unique_strength="0" field="Krone"/>
+    <constraint exp_strength="0" notnull_strength="0" constraints="0" unique_strength="0" field="MKZ"/>
+    <constraint exp_strength="0" notnull_strength="0" constraints="0" unique_strength="0" field="NAME"/>
+    <constraint exp_strength="0" notnull_strength="0" constraints="0" unique_strength="0" field="VKZ"/>
+    <constraint exp_strength="0" notnull_strength="0" constraints="0" unique_strength="0" field="qm"/>
+  </constraints>
+  <constraintExpressions>
+    <constraint exp="" desc="" field="Anzahl"/>
+    <constraint exp="" desc="" field="Baumart"/>
+    <constraint exp="" desc="" field="Belag"/>
+    <constraint exp="" desc="" field="Fahrbahn"/>
+    <constraint exp="" desc="" field="Krone"/>
+    <constraint exp="" desc="" field="MKZ"/>
+    <constraint exp="" desc="" field="NAME"/>
+    <constraint exp="" desc="" field="VKZ"/>
+    <constraint exp="" desc="" field="qm"/>
+  </constraintExpressions>
+  <expressionfields/>
+  <attributeactions>
+    <defaultAction value="{00000000-0000-0000-0000-000000000000}" key="Canvas"/>
+  </attributeactions>
+  <attributetableconfig sortExpression="" actionWidgetStyle="dropDown" sortOrder="0">
+    <columns>
+      <column type="field" name="Anzahl" width="-1" hidden="0"/>
+      <column type="field" name="Baumart" width="-1" hidden="0"/>
+      <column type="field" name="Belag" width="-1" hidden="0"/>
+      <column type="field" name="Fahrbahn" width="-1" hidden="0"/>
+      <column type="field" name="Krone" width="-1" hidden="0"/>
+      <column type="field" name="MKZ" width="-1" hidden="0"/>
+      <column type="field" name="NAME" width="-1" hidden="0"/>
+      <column type="field" name="VKZ" width="-1" hidden="0"/>
+      <column type="field" name="qm" width="-1" hidden="0"/>
+      <column type="actions" width="-1" hidden="1"/>
+    </columns>
+  </attributetableconfig>
+  <conditionalstyles>
+    <rowstyles/>
+    <fieldstyles/>
+  </conditionalstyles>
+  <storedexpressions/>
+  <editform tolerant="1"></editform>
+  <editforminit/>
+  <editforminitcodesource>0</editforminitcodesource>
+  <editforminitfilepath></editforminitfilepath>
+  <editforminitcode><![CDATA[# -*- coding: utf-8 -*-
+"""
+QGIS-Formulare können eine Python-Funktion haben,, die aufgerufen wird, wenn sich das Formular öffnet
+
+Diese Funktion kann verwendet werden um dem Formular Extralogik hinzuzufügen.
+
+Der Name der Funktion wird im Feld "Python Init-Function" angegeben
+Ein Beispiel folgt:
+"""
+from qgis.PyQt.QtWidgets import QWidget
+
+def my_form_open(dialog, layer, feature):
+	geom = feature.geometry()
+	control = dialog.findChild(QWidget, "MyLineEdit")
+]]></editforminitcode>
+  <featformsuppress>0</featformsuppress>
+  <editorlayout>generatedlayout</editorlayout>
+  <editable>
+    <field name="Anzahl" editable="1"/>
+    <field name="Baumart" editable="1"/>
+    <field name="Belag" editable="1"/>
+    <field name="Fahrbahn" editable="1"/>
+    <field name="Krone" editable="1"/>
+    <field name="MKZ" editable="1"/>
+    <field name="NAME" editable="1"/>
+    <field name="VKZ" editable="1"/>
+    <field name="qm" editable="1"/>
+  </editable>
+  <labelOnTop>
+    <field name="Anzahl" labelOnTop="0"/>
+    <field name="Baumart" labelOnTop="0"/>
+    <field name="Belag" labelOnTop="0"/>
+    <field name="Fahrbahn" labelOnTop="0"/>
+    <field name="Krone" labelOnTop="0"/>
+    <field name="MKZ" labelOnTop="0"/>
+    <field name="NAME" labelOnTop="0"/>
+    <field name="VKZ" labelOnTop="0"/>
+    <field name="qm" labelOnTop="0"/>
+  </labelOnTop>
+  <reuseLastValue>
+    <field reuseLastValue="0" name="Anzahl"/>
+    <field reuseLastValue="0" name="Baumart"/>
+    <field reuseLastValue="0" name="Belag"/>
+    <field reuseLastValue="0" name="Fahrbahn"/>
+    <field reuseLastValue="0" name="Krone"/>
+    <field reuseLastValue="0" name="MKZ"/>
+    <field reuseLastValue="0" name="NAME"/>
+    <field reuseLastValue="0" name="VKZ"/>
+    <field reuseLastValue="0" name="qm"/>
+  </reuseLastValue>
+  <dataDefinedFieldProperties/>
+  <widgets/>
+  <previewExpression>"NAME"</previewExpression>
+  <mapTip enabled="1"></mapTip>
+  <layerGeometryType>2</layerGeometryType>
+</qgis>

modules/vln_api_client.py

@@ -0,0 +1,248 @@
+"""HTTP-Client für die VLN-Manager-API.
+
+API-Vertrag (Stand 2026-06-08):
+
+    Basis-URL:  https://api.flurneuordnung-sachsen.de/v2
+
+    POST /person/login
+        Body:    {"mail": "...", "password": "..."}
+        Antwort: {"data": {"userauth": "<url_token>", "id": ...}}
+        Das userauth-Token ist der API-Key (= PERSON.url_token).
+
+    GET  /tgen                   -> Teilnehmergemeinschaften (Verfahren)
+
+    GET  /maps/<layer>/{vkz}     -> GeoJSON FeatureCollection (EPSG:25833)
+    PUT  /maps/<layer>/{vkz}     <- GeoJSON (ersetzt den Layer dieser VKZ)
+        Antwort: {"data": {"vkz", "layer", "art", "speicher_id"}, "status": "ok"}
+
+    Layer: umringe, p41, st, kas, we
+    Auth nach Login über den Header "X-API-Key".
+    Fehlerformat: RFC 7807 (application/problem+json).
+
+Es wird QgsBlockingNetworkRequest verwendet, damit Proxy- und
+Zertifikatseinstellungen aus QGIS automatisch greifen.
+"""
+
+import json
+
+from sn_basis.functions.qt_wrapper import QUrl, QNetworkRequest
+from sn_basis.functions.qgiscore_wrapper import QgsBlockingNetworkRequest
+
+# Fest verdrahtete Produktiv-API des VLN Managers.
+DEFAULT_BASE_URL = "https://api.flurneuordnung-sachsen.de/v2"
+
+
+class ApiError(Exception):
+    """Fehler bei der Kommunikation mit der Karten-API."""
+
+
+class AuthError(ApiError):
+    """API-Key fehlt, ist abgelaufen oder hat keine Berechtigung (401/403)."""
+
+
+class KartenApiClient:
+    def __init__(self, base_url=DEFAULT_BASE_URL, api_key=None, mail=None):
+        self.base_url = base_url.rstrip("/")
+        self.api_key = api_key
+        self.mail = mail
+
+    @property
+    def is_authenticated(self):
+        return bool(self.api_key)
+
+    def login(self, mail, password):
+        """Meldet den Benutzer an. Die API liefert das userauth-Token
+        (= API-Key), das für alle weiteren Requests verwendet wird."""
+        data = self._request(
+            "POST",
+            "/person/login",
+            payload={"mail": mail, "password": password},
+            with_auth=False,
+        )
+        payload = data.get("data") if isinstance(data, dict) else None
+        if not isinstance(payload, dict):
+            payload = data if isinstance(data, dict) else {}
+        api_key = payload.get("userauth")
+        if not api_key:
+            raise ApiError(
+                "Login-Antwort enthielt kein userauth-Token. "
+                "Erhaltene Antwort: %s" % json.dumps(data)[:300]
+            )
+        self.api_key = api_key
+        self.mail = mail
+        return api_key
+
+    def logout(self):
+        self.api_key = None
+        self.mail = None
+
+    # ------------------------------------------------------------------
+    # Verfahren (Teilnehmergemeinschaften)
+    # ------------------------------------------------------------------
+
+    def get_verfahren(self):
+        """Liste der Verfahren (TGs) als [{"vkz": ..., "name": ...}, ...],
+        sortiert nach VKZ. Quelle: GET /tgen."""
+        data = self._request("GET", "/tgen")
+
+        rows = None
+        if isinstance(data, list):
+            rows = data
+        elif isinstance(data, dict):
+            for key in ("data", "rows"):
+                value = data.get(key)
+                if isinstance(value, list):
+                    rows = value
+                    break
+                if isinstance(value, dict) and isinstance(value.get("rows"), list):
+                    rows = value["rows"]
+                    break
+        if rows is None:
+            raise ApiError(
+                "Antwort von /tgen hat ein unerwartetes Format: %s"
+                % json.dumps(data)[:200]
+            )
+
+        verfahren = []
+        for row in rows:
+            if not isinstance(row, dict):
+                continue
+            vkz = row.get("vkz") or row.get("VKZ")
+            name = (
+                row.get("kurzname")
+                or row.get("Kurzname")
+                or row.get("name")
+                or row.get("Name")
+                or ""
+            )
+            if vkz:
+                verfahren.append({"vkz": str(vkz), "name": str(name)})
+        verfahren.sort(key=lambda v: v["vkz"])
+        return verfahren
+
+    # ------------------------------------------------------------------
+    # Karten-Layer
+    # ------------------------------------------------------------------
+
+    def load_layer_complete(self, layer_key, vkz, page_size=2000):
+        """Lädt ALLE Objekte eines Layers für eine VKZ aus KARTE_OBJEKT.
+
+        Nutzt den Listen-Endpunkt /maps/<layer>?vkz=… mit limit/offset-Paging,
+        bis keine weitere Seite mehr kommt."""
+        from urllib.parse import quote
+
+        features = []
+        offset = 0
+        while True:
+            data = self._request(
+                "GET",
+                "/maps/%s?vkz=%s&limit=%d&offset=%d"
+                % (quote(str(layer_key)), quote(str(vkz)), page_size, offset),
+            )
+            if not isinstance(data, dict) or data.get("type") != "FeatureCollection":
+                raise ApiError(
+                    "Antwort von /maps/%s ist keine GeoJSON FeatureCollection."
+                    % layer_key
+                )
+            page = data.get("features", [])
+            features.extend(page)
+            if len(page) < page_size:
+                break
+            offset += page_size
+        return {"type": "FeatureCollection", "features": features}
+
+    def load_feature_collection(self, path):
+        """Lädt einen Layer als GeoJSON FeatureCollection (dict)."""
+        data = self._request("GET", path)
+        if isinstance(data, dict):
+            if data.get("type") == "FeatureCollection":
+                return data
+            inner = data.get("data")
+            if isinstance(inner, dict) and inner.get("type") == "FeatureCollection":
+                return inner
+        raise ApiError(
+            "Antwort von %s ist keine GeoJSON FeatureCollection." % path
+        )
+
+    def save_feature_collection(self, path, feature_collection):
+        """Schreibt eine GeoJSON FeatureCollection zurück an die API
+        (PUT ersetzt den kompletten Layer der jeweiligen VKZ)."""
+        return self._request("PUT", path, payload=feature_collection)
+
+    # ------------------------------------------------------------------
+    # Intern
+    # ------------------------------------------------------------------
+
+    def _request(self, method, path, payload=None, with_auth=True):
+        if with_auth and not self.is_authenticated:
+            raise AuthError("Nicht angemeldet — bitte zuerst einloggen.")
+
+        request = QNetworkRequest(QUrl(self.base_url + path))
+        request.setHeader(
+            QNetworkRequest.KnownHeaders.ContentTypeHeader, "application/json"
+        )
+        request.setRawHeader(b"Accept", b"application/json")
+        if with_auth:
+            request.setRawHeader(b"X-API-Key", self.api_key.encode("utf-8"))
+
+        body = b""
+        if payload is not None:
+            body = json.dumps(payload).encode("utf-8")
+
+        blocking = QgsBlockingNetworkRequest()
+        if method == "GET":
+            error = blocking.get(request)
+        elif method == "POST":
+            error = blocking.post(request, body)
+        elif method == "PUT":
+            error = blocking.put(request, body)
+        else:
+            raise ApiError("Nicht unterstützte HTTP-Methode: %s" % method)
+
+        reply = blocking.reply()
+        content = bytes(reply.content())
+        status = reply.attribute(
+            QNetworkRequest.Attribute.HttpStatusCodeAttribute
+        )
+        status = int(status) if status is not None else None
+
+        if status in (401, 403):
+            raise AuthError(
+                "Keine Berechtigung für %s %s (HTTP %s)%s"
+                % (method, path, status, self._error_detail(content))
+            )
+        if error != QgsBlockingNetworkRequest.NoError:
+            raise ApiError(
+                "%s %s fehlgeschlagen: %s%s"
+                % (method, path, blocking.errorMessage(), self._error_detail(content))
+            )
+        if status is not None and status >= 400:
+            raise ApiError(
+                "%s %s lieferte HTTP %s%s"
+                % (method, path, status, self._error_detail(content))
+            )
+
+        if not content:
+            return None
+        try:
+            return json.loads(content.decode("utf-8"))
+        except ValueError:
+            raise ApiError(
+                "Antwort von %s ist kein gültiges JSON." % path
+            )
+
+    @staticmethod
+    def _error_detail(content):
+        """Liest title/detail aus einer RFC-7807-Fehlerantwort."""
+        if not content:
+            return ""
+        try:
+            problem = json.loads(content.decode("utf-8"))
+            parts = [
+                str(problem[k]) for k in ("title", "detail") if problem.get(k)
+            ]
+            if parts:
+                return " — " + ": ".join(parts)
+        except (ValueError, AttributeError):
+            pass
+        return " — " + content[:300].decode("utf-8", "replace")

modules/vln_api_logic.py

@@ -0,0 +1,378 @@
+"""
+sn_plan41/modules/vln_api_logic.py – Fachlogik für die VLN-API-Integration in Tab A.
+
+Kapselt:
+- Anmeldung / Abmeldung (KartenApiClient aus vln_karten)
+- Persistierung des API-Keys in QSettings
+- Verfahrensliste laden (GET /tgen)
+- Persistierung der VKZ-Auswahl in der Projektdatei
+- Plan 41 laden (2 Layer + Stile aus sn_plan41/assets/)
+- Aktiven Layer hochladen
+
+Voraussetzung: Das Plugin `vln_karten` muss installiert sein.
+Wenn nicht vorhanden, liefert :attr:`is_available` False; die UI
+kann dann einen entsprechenden Hinweis anzeigen.
+
+Sitzungsablauf bei AuthError:
+- :meth:`handle_session_expired` aufrufen → API-Key löschen + logout
+- In der UI danach :meth:`_update_vln_ui_state` aufrufen und
+  QMessageBox.warning anzeigen. Kein automatischer Login-Dialog.
+"""
+
+from __future__ import annotations
+
+from typing import Optional
+
+from sn_basis.functions.qt_wrapper import QSettings
+from sn_basis.functions.qgiscore_wrapper import QgsProject
+from sn_basis.functions.sys_wrapper import get_plugin_root, join_path
+from sn_basis.functions.ly_style_wrapper import apply_style_from_path
+
+# Lokale API-Module — fallenübrig, sobald QGIS verfügbar ist.
+# In der reinen Python-Testumgebung (kein qgis-Paket) schlagen die
+# qgis-Imports in den Untermodulen fehl; daher der try/except-Guard.
+try:
+    from sn_plan41.modules.vln_api_client import KartenApiClient, ApiError, AuthError
+    from sn_plan41.modules.vln_layer_manager import (
+        feature_collection_to_layers,
+        plugin_layers,
+        layers_to_feature_collection,
+        layer_api_path,
+        PROP_DATASET,
+        PROP_VERFAHREN,
+    )
+    VLN_KARTEN_AVAILABLE = True
+except (ImportError, ModuleNotFoundError):
+    KartenApiClient = None  # type: ignore[assignment,misc]
+    ApiError = Exception  # type: ignore[assignment,misc]
+    AuthError = Exception  # type: ignore[assignment,misc]
+    VLN_KARTEN_AVAILABLE = False
+
+# Geometrietyp-Konstanten (QGIS intern: 1 = Linie, 2 = Fläche)
+try:
+    from qgis.core import Qgis as _Qgis
+    _GEOM_LINE = _Qgis.GeometryType.Line
+    _GEOM_POLYGON = _Qgis.GeometryType.Polygon
+except (ImportError, AttributeError):
+    try:
+        from qgis.core import QgsWkbTypes as _QgsWkbTypes
+        _GEOM_LINE = _QgsWkbTypes.LineGeometry
+        _GEOM_POLYGON = _QgsWkbTypes.PolygonGeometry
+    except (ImportError, AttributeError):
+        _GEOM_LINE = 1
+        _GEOM_POLYGON = 2
+
+# Konstanten
+SETTINGS_GROUP = "vln_karten"
+PROJECT_SCOPE = "vln_karten"
+PROJECT_KEY_VKZ = "/vkz"
+
+P41_DATASET_KEY = "p41"
+P41_LABEL = "Plan 41 (Wege- und Gewässerplan)"
+P41_PATH_TEMPLATE = "/maps/p41/{vkz}"
+P41_GEOMETRY = "MultiPolygon"
+
+STYLE_FLAECHE = "QGIS_P41_API_Layer_flaeche.qml"
+STYLE_LINIE = "QGIS_P41_API_Layer_Linie.qml"
+
+
+class VlnApiLogic:
+    """
+    Kapselt die VLN-API-Fachlogik für den Plan41-Tab.
+
+    Alle Methoden, die Netzwerkkommunikation erfordern, können
+    ``ApiError`` oder ``AuthError`` werfen – die UI ist für die
+    Fehlerdarstellung zuständig.
+    """
+
+    def __init__(self, pruefmanager=None) -> None:
+        self.pruefmanager = pruefmanager
+        self._client: Optional[object] = None  # KartenApiClient | None
+
+        # API-Client aus gespeicherten Credentials initialisieren
+        if VLN_KARTEN_AVAILABLE:
+            api_key, mail = self.load_stored_credentials()
+            if api_key:
+                self._client = KartenApiClient(api_key=api_key, mail=mail)
+
+    # ------------------------------------------------------------------
+    # Verfügbarkeit
+    # ------------------------------------------------------------------
+
+    @staticmethod
+    def is_available() -> bool:
+        """True, wenn die lokalen API-Module geladen werden konnten
+        (erfordert eine QGIS-Laufzeitumgebung)."""
+        return VLN_KARTEN_AVAILABLE
+
+    # ------------------------------------------------------------------
+    # Authentifizierungsstatus
+    # ------------------------------------------------------------------
+
+    @property
+    def is_authenticated(self) -> bool:
+        """True, wenn ein gültiger API-Key vorhanden ist."""
+        if self._client is None:
+            return False
+        return bool(getattr(self._client, "is_authenticated", False))
+
+    @property
+    def mail(self) -> Optional[str]:
+        """E-Mail-Adresse des angemeldeten Benutzers oder None."""
+        if self._client is None:
+            return None
+        return getattr(self._client, "mail", None)
+
+    # ------------------------------------------------------------------
+    # QSettings: API-Key persistieren
+    # ------------------------------------------------------------------
+
+    def load_stored_credentials(self) -> tuple:
+        """Liest API-Key und Mail aus QSettings.
+        Gibt ``(api_key, mail)`` zurück – leere Strings wenn nicht vorhanden.
+        """
+        settings = QSettings()
+        settings.beginGroup(SETTINGS_GROUP)
+        api_key = settings.value("api_key", "")
+        mail = settings.value("mail", "")
+        settings.endGroup()
+        return api_key or None, mail or None
+
+    def save_api_key(self, api_key: str, mail: str) -> None:
+        """Speichert API-Key und Mail in QSettings."""
+        settings = QSettings()
+        settings.beginGroup(SETTINGS_GROUP)
+        settings.setValue("api_key", api_key)
+        settings.setValue("mail", mail or "")
+        settings.endGroup()
+
+    def clear_api_key(self) -> None:
+        """Entfernt API-Key aus QSettings."""
+        settings = QSettings()
+        settings.beginGroup(SETTINGS_GROUP)
+        settings.remove("api_key")
+        settings.endGroup()
+
+    # ------------------------------------------------------------------
+    # Login / Logout
+    # ------------------------------------------------------------------
+
+    def login(self, mail: str, password: str) -> None:
+        """
+        Meldet den Benutzer an und speichert den API-Key.
+
+        :raises ApiError: Bei ungültigen Zugangsdaten oder Netzwerkproblem.
+        :raises RuntimeError: Wenn QGIS nicht verfügbar ist (kein qgis-Paket).
+        """
+        if not VLN_KARTEN_AVAILABLE:
+            raise RuntimeError(
+                "VLN-API-Module nicht verfügbar (QGIS-Laufzeitumgebung benötigt)."
+            )
+        client = KartenApiClient()
+        client.login(mail, password)  # wirft ApiError bei Fehler
+        self._client = client
+        self.save_api_key(client.api_key, mail)
+
+    def logout(self) -> None:
+        """Meldet den Benutzer ab (lokal, kein API-Aufruf)."""
+        if self._client is not None:
+            getattr(self._client, "logout", lambda: None)()
+        self._client = None
+
+    def handle_session_expired(self) -> None:
+        """
+        Behandelt einen abgelaufenen API-Key:
+        entfernt ihn aus QSettings und setzt den Client zurück.
+        """
+        self.clear_api_key()
+        self.logout()
+
+    # ------------------------------------------------------------------
+    # Verfahrensliste
+    # ------------------------------------------------------------------
+
+    def get_verfahren(self) -> list:
+        """
+        Lädt alle Verfahren (TGs) vom Server.
+
+        :returns: Sortierte Liste von ``{"vkz": ..., "name": ...}``-Dicts.
+        :raises AuthError: Wenn nicht angemeldet oder Session abgelaufen.
+        :raises ApiError: Bei sonstigem Netzwerkfehler.
+        """
+        if self._client is None:
+            raise AuthError("Nicht angemeldet.")
+        return self._client.get_verfahren()
+
+    # ------------------------------------------------------------------
+    # VKZ-Persistenz in Projektdatei
+    # ------------------------------------------------------------------
+
+    def load_stored_vkz(self) -> Optional[str]:
+        """Liest die zuletzt gewählte VKZ aus der Projektdatei."""
+        try:
+            vkz, _ok = QgsProject.instance().readEntry(
+                PROJECT_SCOPE, PROJECT_KEY_VKZ, ""
+            )
+            return vkz if vkz else None
+        except Exception:
+            return None
+
+    def save_vkz(self, vkz: Optional[str]) -> None:
+        """Schreibt die gewählte VKZ in die Projektdatei."""
+        if not vkz:
+            return
+        try:
+            QgsProject.instance().writeEntry(PROJECT_SCOPE, PROJECT_KEY_VKZ, vkz)
+        except Exception:
+            pass
+
+    # ------------------------------------------------------------------
+    # Plan 41 laden
+    # ------------------------------------------------------------------
+
+    def get_p41_layers(self, vkz: str) -> list:
+        """Gibt alle bereits geladenen P41-Layer für diese VKZ zurück."""
+        return plugin_layers(P41_DATASET_KEY, vkz)
+
+    def remove_p41_layers(self, vkz: str) -> None:
+        """Entfernt alle P41-Layer dieser VKZ aus dem Projekt."""
+        existing = plugin_layers(P41_DATASET_KEY, vkz)
+        if existing:
+            QgsProject.instance().removeMapLayers([l.id() for l in existing])
+
+    def load_p41(self, vkz: str) -> list:
+        """
+        Lädt den Plan-41-Datensatz für eine VKZ vom Server und legt
+        Memory-Layer im Projekt an.  Auf die entstandenen Layer werden
+        die passenden QML-Stile aus ``sn_plan41/assets/`` angewendet.
+
+        :returns: Liste der erzeugten ``QgsVectorLayer``.
+        :raises AuthError: Wenn nicht angemeldet oder Session abgelaufen.
+        :raises ApiError: Bei sonstigem Netzwerkfehler.
+        :raises RuntimeError: Wenn QGIS nicht verfügbar ist.
+        """
+        if not VLN_KARTEN_AVAILABLE:
+            raise RuntimeError(
+                "VLN-API-Module nicht verfügbar (QGIS-Laufzeitumgebung benötigt)."
+            )
+        if self._client is None:
+            raise AuthError("Nicht angemeldet.")
+
+        path = P41_PATH_TEMPLATE.format(vkz=vkz)
+        feature_collection = self._client.load_layer_complete(
+            P41_DATASET_KEY, vkz
+        )
+        base_name = "%s %s" % (P41_LABEL, vkz)
+        layers = feature_collection_to_layers(
+            feature_collection,
+            base_name,
+            P41_GEOMETRY,
+            P41_DATASET_KEY,
+            vkz,
+            path,
+        )
+        self._apply_p41_styles(layers)
+        return layers
+
+    def _apply_p41_styles(self, layers: list) -> None:
+        """Wendet den passenden QML-Stil auf jeden Layer an."""
+        assets_dir = join_path(get_plugin_root(), "sn_plan41", "assets")
+        for layer in layers:
+            try:
+                gtype = layer.geometryType()
+            except Exception:
+                continue
+
+            if gtype == _GEOM_POLYGON:
+                style_file = STYLE_FLAECHE
+            elif gtype == _GEOM_LINE:
+                style_file = STYLE_LINIE
+            else:
+                continue  # Punkt- und None-Layer erhalten keinen Stil
+
+            style_path = join_path(assets_dir, style_file)
+            apply_style_from_path(layer, style_path)
+
+    # ------------------------------------------------------------------
+    # Upload
+    # ------------------------------------------------------------------
+
+    def upload_active_layer(self, active_layer) -> tuple:
+        """
+        Lädt alle Teil-Layer des aktiven Layers zum Server hoch.
+
+        :param active_layer: Aktiver ``QgsVectorLayer`` (aus ``iface.activeLayer()``).
+        :returns: ``(success: bool, message: str)``
+        :raises AuthError: Wenn Session abgelaufen.
+        :raises ApiError: Bei Netzwerkfehler.
+        """
+        if not VLN_KARTEN_AVAILABLE:
+            return False, (
+                "VLN-API-Module nicht verfügbar (QGIS-Laufzeitumgebung benötigt)."
+            )
+
+        if self._client is None:
+            raise AuthError("Nicht angemeldet.")
+
+        path = layer_api_path(active_layer) if active_layer else None
+        if not path:
+            return (
+                False,
+                "Der aktive Layer wurde nicht über 'vln_karten' geladen. "
+                "Bitte einen Plan41-Layer aus dem Projekt auswählen.",
+            )
+
+        dataset_key = active_layer.customProperty(PROP_DATASET)
+        vkz = active_layer.customProperty(PROP_VERFAHREN)
+        siblings = plugin_layers(dataset_key, vkz)
+
+        for layer in siblings:
+            if layer.isEditable() and not layer.commitChanges():
+                return (
+                    False,
+                    "Die Bearbeitungssitzung von '%s' konnte nicht "
+                    "gespeichert werden." % layer.name(),
+                )
+
+        feature_collection = layers_to_feature_collection(siblings)
+        self._client.save_feature_collection(path, feature_collection)
+
+        total = sum(layer.featureCount() for layer in siblings)
+        return (
+            True,
+            "%d Objekte aus %d Layer(n) erfolgreich hochgeladen."
+            % (total, len(siblings)),
+        )
+
+    def upload_summary(self, active_layer) -> Optional[dict]:
+        """
+        Gibt eine Zusammenfassung der zu hochladenden Layer zurück
+        (für den Bestätigungs-Dialog in der UI), ohne den Upload
+        tatsächlich auszuführen.
+
+        :returns: Dict mit ``dataset_label``, ``vkz``, ``siblings``
+                  (Layer-Liste), ``total`` (Objektanzahl), ``listing`` (str)
+                  oder ``None`` wenn kein gültiger Layer.
+        """
+        if not VLN_KARTEN_AVAILABLE or active_layer is None:
+            return None
+        path = layer_api_path(active_layer)
+        if not path:
+            return None
+
+        dataset_key = active_layer.customProperty(PROP_DATASET)
+        vkz = active_layer.customProperty(PROP_VERFAHREN)
+        siblings = plugin_layers(dataset_key, vkz)
+
+        total = sum(l.featureCount() for l in siblings)
+        listing = "\n".join(
+            "• %s (%d Objekte)" % (l.name(), l.featureCount())
+            for l in siblings
+        )
+        return {
+            "dataset_label": P41_LABEL if dataset_key == P41_DATASET_KEY else dataset_key,
+            "vkz": vkz,
+            "siblings": siblings,
+            "total": total,
+            "listing": listing,
+        }

modules/vln_layer_manager.py

@@ -0,0 +1,177 @@
+"""Konvertierung GeoJSON <-> QGIS-Layer für die VLN-API.
+
+Lokale Kopie des Layer-Managers aus dem vln_karten-Plugin — sn_plan41
+benötigt kein separat installiertes vln_karten-Plugin mehr.
+
+Die API liefert je Layer (z.B. Plan 41) gemischte Geometrietypen in einer
+FeatureCollection: Punkte, Linien, Polygone sowie deren Multi-Varianten.
+QGIS-Memory-Layer können nur einen Geometrietyp halten — beim Laden wird
+deshalb nach Geometrie-Familie (Punkte/Linien/Flächen) in bis zu drei
+Layer gesplittet; Single-Geometrien werden zu Multi befördert.
+
+Beim Hochladen müssen alle Teil-Layer desselben Datensatzes wieder zu
+EINER FeatureCollection vereint werden, weil der PUT der API den
+kompletten Layer-Bestand der VKZ ersetzt.
+
+Custom-Properties an Layern (kompatibel mit vln_karten, falls beide
+Plugins gleichzeitig installiert sind):
+  vln_karten/dataset    — z.B. "p41"
+  vln_karten/verfahren  — VKZ-Nummer
+  vln_karten/api_path   — API-Pfad für Upload
+"""
+
+import json
+
+from sn_basis.functions.qgiscore_wrapper import (
+    QgsJsonExporter,
+    QgsJsonUtils,
+    QgsProject,
+    QgsVectorLayer,
+    GEOM_POINT,
+    GEOM_LINE,
+    GEOM_POLYGON,
+)
+
+_GEOM_POINT = GEOM_POINT
+_GEOM_LINE = GEOM_LINE
+_GEOM_POLYGON = GEOM_POLYGON
+
+# Die VLN-API liefert Koordinaten in ETRS89 / UTM Zone 33 (EPSG:25833).
+GEOJSON_CRS = "EPSG:25833"
+
+# Custom-Property-Schlüssel — identisch mit vln_karten für Kompatibilität.
+PROP_DATASET = "vln_karten/dataset"
+PROP_VERFAHREN = "vln_karten/verfahren"
+PROP_PATH = "vln_karten/api_path"
+
+# Geometrie-Familie → (Memory-Provider-Typ, Namenszusatz).
+# Reihenfolge = Lade-Reihenfolge: Flächen zuerst, damit Punkte im
+# Layerbaum oben landen und nicht verdeckt werden.
+_FAMILIES = (
+    ("polygon", "MultiPolygon", "Flächen"),
+    ("line", "MultiLineString", "Linien"),
+    ("point", "MultiPoint", "Punkte"),
+    ("none", "None", "ohne Geometrie"),
+)
+
+
+def _family(feature):
+    """Geometrie-Familie eines Features. Unbekannte Typen (z.B.
+    GeometryCollection) landen bei 'none'."""
+    if not feature.hasGeometry() or feature.geometry().isNull():
+        return "none"
+    gtype = feature.geometry().type()
+    if gtype == _GEOM_POINT:
+        return "point"
+    if gtype == _GEOM_LINE:
+        return "line"
+    if gtype == _GEOM_POLYGON:
+        return "polygon"
+    return "none"
+
+
+def memory_layer_from_features(
+    uri_type, name, fields, features, dataset_key, verfahren_nr, api_path, promote=True
+):
+    """Baut einen Memory-Layer aus fertigen QgsFeatures, setzt die
+    Plugin-Custom-Properties und hängt ihn ins Projekt."""
+    uri = uri_type if uri_type == "None" else "%s?crs=%s" % (uri_type, GEOJSON_CRS)
+    layer = QgsVectorLayer(uri, name, "memory")
+    if not layer.isValid():
+        raise RuntimeError("Memory-Layer '%s' konnte nicht erzeugt werden." % name)
+    provider = layer.dataProvider()
+    provider.addAttributes(fields.toList())
+    layer.updateFields()
+    prepared = []
+    for feature in features:
+        geometry = feature.geometry()
+        if promote and not geometry.isNull() and not geometry.isMultipart():
+            geometry.convertToMultiType()
+            feature.setGeometry(geometry)
+        prepared.append(feature)
+    provider.addFeatures(prepared)
+    layer.updateExtents()
+    layer.setCustomProperty(PROP_DATASET, dataset_key)
+    layer.setCustomProperty(PROP_VERFAHREN, verfahren_nr)
+    layer.setCustomProperty(PROP_PATH, api_path)
+    return layer
+
+
+def feature_collection_to_layers(
+    feature_collection, base_name, default_geometry, dataset_key, verfahren_nr, api_path
+):
+    """Erzeugt aus einer GeoJSON FeatureCollection je vorkommender
+    Geometrie-Familie einen Memory-Layer und hängt sie ins Projekt.
+    Liefert die Liste der erzeugten Layer."""
+    text = json.dumps(feature_collection)
+    fields = QgsJsonUtils.stringToFields(text)
+    features = QgsJsonUtils.stringToFeatureList(text, fields)
+
+    groups = {}
+    for feature in features:
+        groups.setdefault(_family(feature), []).append(feature)
+
+    layers = []
+    multiple = len(groups) > 1
+
+    def make_layer(uri_type, name, group_features, promote):
+        layers.append(
+            memory_layer_from_features(
+                uri_type, name, fields, group_features,
+                dataset_key, verfahren_nr, api_path, promote=promote,
+            )
+        )
+
+    if not groups:
+        # Leerer Datensatz: ein leerer Layer im Default-Typ, damit der
+        # Nutzer digitalisieren und hochladen kann.
+        make_layer(default_geometry, base_name, [], promote=False)
+    else:
+        for family, uri_type, suffix in _FAMILIES:
+            if family not in groups:
+                continue
+            name = "%s — %s" % (base_name, suffix) if multiple else base_name
+            make_layer(uri_type, name, groups[family], promote=(family != "none"))
+
+    QgsProject.instance().addMapLayers(layers)
+    return layers
+
+
+def plugin_layers(dataset_key, verfahren_nr):
+    """Alle Layer im Projekt, die zu diesem Datensatz und dieser VKZ
+    gehören (z.B. die Punkte-/Linien-/Flächen-Teil-Layer von Plan 41)."""
+    result = []
+    for layer in QgsProject.instance().mapLayers().values():
+        if (
+            isinstance(layer, QgsVectorLayer)
+            and layer.customProperty(PROP_DATASET) == dataset_key
+            and str(layer.customProperty(PROP_VERFAHREN)) == str(verfahren_nr)
+        ):
+            result.append(layer)
+    return result
+
+
+def layers_to_feature_collection(layers):
+    """Vereint die Features mehrerer Layer zu EINER GeoJSON
+    FeatureCollection (für den PUT, der den Serverbestand ersetzt).
+
+    Keine Transformation nach WGS84: Die API erwartet die Koordinaten im
+    selben CRS, in dem sie sie liefert (EPSG:25833)."""
+    merged = []
+    for layer in layers:
+        exporter = QgsJsonExporter(layer)
+        exporter.setSourceCrs(layer.crs())
+        exporter.setTransformGeometries(False)
+        collection = json.loads(
+            exporter.exportFeatures(list(layer.getFeatures()))
+        )
+        merged.extend(collection.get("features", []))
+    return {"type": "FeatureCollection", "features": merged}
+
+
+def layer_api_path(layer):
+    """API-Pfad, unter dem dieser Layer geladen wurde — oder None,
+    wenn der Layer nicht von diesem Plugin stammt."""
+    if not isinstance(layer, QgsVectorLayer):
+        return None
+    return layer.customProperty(PROP_PATH) or None

tests/run_tests.py

@@ -5,6 +5,7 @@ Zentraler Test-Runner für sn_plan41.
 Wrapper-konform, QGIS-unabhängig, CI- und IDE-fähig.
 """
 
+import io
 import unittest
 import datetime
 import inspect
@@ -12,6 +13,19 @@ import os
 import sys
 from pathlib import Path
 
+# Stdout auf UTF-8 umstellen, damit Emoji-Print-Statements in
+# qt_wrapper.py (Mock-Modus) auf Windows-Konsolen (CP1252) nicht zu
+# UnicodeEncodeError führen.
+if hasattr(sys.stdout, "reconfigure"):
+    try:
+        sys.stdout.reconfigure(encoding="utf-8", errors="replace")
+    except Exception:
+        pass
+elif hasattr(sys.stdout, "buffer"):
+    sys.stdout = io.TextIOWrapper(
+        sys.stdout.buffer, encoding="utf-8", errors="replace"
+    )
+
 
 # ---------------------------------------------------------
 # Plugin-Roots bestimmen

tests/test_vln_api_logic.py

@@ -0,0 +1,473 @@
+"""
+Tests für sn_plan41/modules/vln_api_logic.py
+
+Alle externen Abhängigkeiten (vln_karten, QSettings, QgsProject, Netzwerk)
+werden mit unittest.mock gemockt, sodass keine QGIS-Laufzeitumgebung nötig ist.
+"""
+
+import unittest
+from typing import Any, Optional
+from unittest.mock import MagicMock, patch, call
+
+
+# ---------------------------------------------------------------------------
+# Helpers
+# ---------------------------------------------------------------------------
+
+def _make_logic(api_key: Optional[str] = None, mail: Optional[str] = None):
+    """Erzeugt eine VlnApiLogic-Instanz mit gemockten QSettings."""
+    from sn_plan41.modules.vln_api_logic import VlnApiLogic
+
+    with patch("sn_plan41.modules.vln_api_logic.QSettings") as mock_qs_cls:
+        mock_qs = MagicMock()
+        mock_qs.value.side_effect = lambda key, default="": (
+            api_key if key == "api_key" else (mail if key == "mail" else default)
+        )
+        mock_qs_cls.return_value = mock_qs
+
+        if api_key and VlnApiLogic.is_available():
+            with patch(
+                "sn_plan41.modules.vln_api_logic.KartenApiClient"
+            ) as mock_client_cls:
+                mock_client = MagicMock()
+                mock_client.is_authenticated = True
+                mock_client.api_key = api_key
+                mock_client.mail = mail
+                mock_client_cls.return_value = mock_client
+                logic = VlnApiLogic()
+        else:
+            logic = VlnApiLogic()
+
+    return logic
+
+
+# ---------------------------------------------------------------------------
+# Tests: Verfügbarkeit
+# ---------------------------------------------------------------------------
+
+
+class TestVlnApiLogicAvailability(unittest.TestCase):
+
+    def test_is_available_reflects_import_state(self):
+        from sn_plan41.modules.vln_api_logic import VlnApiLogic
+        result = VlnApiLogic.is_available()
+        # Ergebnis hängt davon ab, ob vln_karten installiert ist —
+        # wir prüfen nur, dass ein bool zurückkommt
+        self.assertIsInstance(result, bool)
+
+    def test_is_available_false_when_vln_karten_missing(self):
+        """Wenn VLN_KARTEN_AVAILABLE=False, liefert is_available() False."""
+        import sn_plan41.modules.vln_api_logic as module
+        original = module.VLN_KARTEN_AVAILABLE
+        try:
+            module.VLN_KARTEN_AVAILABLE = False
+            from sn_plan41.modules.vln_api_logic import VlnApiLogic
+            with patch.object(module, "VLN_KARTEN_AVAILABLE", False):
+                self.assertFalse(VlnApiLogic.is_available())
+        finally:
+            module.VLN_KARTEN_AVAILABLE = original
+
+
+# ---------------------------------------------------------------------------
+# Tests: Credentials-Persistenz
+# ---------------------------------------------------------------------------
+
+
+class TestVlnApiLogicCredentials(unittest.TestCase):
+
+    def _make(self):
+        from sn_plan41.modules.vln_api_logic import VlnApiLogic
+
+        with patch("sn_plan41.modules.vln_api_logic.QSettings"):
+            with patch("sn_plan41.modules.vln_api_logic.KartenApiClient"):
+                return VlnApiLogic()
+
+    def test_save_api_key_calls_qsettings(self):
+        logic = self._make()
+        with patch("sn_plan41.modules.vln_api_logic.QSettings") as mock_qs_cls:
+            mock_qs = MagicMock()
+            mock_qs_cls.return_value = mock_qs
+            logic.save_api_key("token123", "user@test.de")
+
+        mock_qs.setValue.assert_any_call("api_key", "token123")
+        mock_qs.setValue.assert_any_call("mail", "user@test.de")
+        mock_qs.beginGroup.assert_called_with("vln_karten")
+
+    def test_clear_api_key_calls_remove(self):
+        logic = self._make()
+        with patch("sn_plan41.modules.vln_api_logic.QSettings") as mock_qs_cls:
+            mock_qs = MagicMock()
+            mock_qs_cls.return_value = mock_qs
+            logic.clear_api_key()
+
+        mock_qs.remove.assert_called_with("api_key")
+
+    def test_load_stored_credentials_returns_api_key_and_mail(self):
+        logic = self._make()
+        with patch("sn_plan41.modules.vln_api_logic.QSettings") as mock_qs_cls:
+            mock_qs = MagicMock()
+            mock_qs.value.side_effect = lambda key, default="": {
+                "api_key": "mykey",
+                "mail": "user@test.de",
+            }.get(key, default)
+            mock_qs_cls.return_value = mock_qs
+
+            api_key, mail = logic.load_stored_credentials()
+
+        self.assertEqual(api_key, "mykey")
+        self.assertEqual(mail, "user@test.de")
+
+    def test_load_stored_credentials_returns_none_for_empty(self):
+        logic = self._make()
+        with patch("sn_plan41.modules.vln_api_logic.QSettings") as mock_qs_cls:
+            mock_qs = MagicMock()
+            mock_qs.value.return_value = ""
+            mock_qs_cls.return_value = mock_qs
+
+            api_key, mail = logic.load_stored_credentials()
+
+        self.assertIsNone(api_key)
+        self.assertIsNone(mail)
+
+
+# ---------------------------------------------------------------------------
+# Tests: Login / Logout
+# ---------------------------------------------------------------------------
+
+
+class TestVlnApiLogicLogin(unittest.TestCase):
+
+    def _make(self):
+        from sn_plan41.modules.vln_api_logic import VlnApiLogic
+
+        with patch("sn_plan41.modules.vln_api_logic.QSettings"):
+            with patch("sn_plan41.modules.vln_api_logic.KartenApiClient"):
+                return VlnApiLogic()
+
+    def test_login_sets_client_and_saves_key(self):
+        import sn_plan41.modules.vln_api_logic as module
+        if not module.VLN_KARTEN_AVAILABLE:
+            self.skipTest("vln_karten nicht verfügbar")
+
+        logic = self._make()
+
+        mock_client = MagicMock()
+        mock_client.api_key = "newtoken"
+
+        with patch("sn_plan41.modules.vln_api_logic.KartenApiClient", return_value=mock_client):
+            with patch.object(logic, "save_api_key") as mock_save:
+                logic.login("user@test.de", "secret")
+
+        mock_client.login.assert_called_once_with("user@test.de", "secret")
+        mock_save.assert_called_once_with("newtoken", "user@test.de")
+
+    def test_login_raises_runtime_error_without_qgis_modules(self):
+        import sn_plan41.modules.vln_api_logic as module
+        logic = self._make()
+        with patch.object(module, "VLN_KARTEN_AVAILABLE", False):
+            with self.assertRaises(RuntimeError):
+                logic.login("user@test.de", "secret")
+
+    def test_login_propagates_api_error(self):
+        import sn_plan41.modules.vln_api_logic as module
+        if not module.VLN_KARTEN_AVAILABLE:
+            self.skipTest("vln_karten nicht verfügbar")
+
+        logic = self._make()
+        mock_client = MagicMock()
+        mock_client.login.side_effect = module.ApiError("Ungültige Zugangsdaten")
+
+        with patch("sn_plan41.modules.vln_api_logic.KartenApiClient", return_value=mock_client):
+            with self.assertRaises(Exception):
+                logic.login("user@test.de", "wrong")
+
+    def test_logout_clears_client(self):
+        logic = self._make()
+        logic._client = MagicMock()
+        logic.logout()
+        self.assertIsNone(logic._client)
+
+    def test_is_authenticated_false_after_logout(self):
+        logic = self._make()
+        logic._client = None
+        self.assertFalse(logic.is_authenticated)
+
+    def test_handle_session_expired_clears_key_and_client(self):
+        logic = self._make()
+        with patch.object(logic, "clear_api_key") as mock_clear:
+            with patch.object(logic, "logout") as mock_logout:
+                logic.handle_session_expired()
+
+        mock_clear.assert_called_once()
+        mock_logout.assert_called_once()
+
+
+# ---------------------------------------------------------------------------
+# Tests: Verfahrensliste
+# ---------------------------------------------------------------------------
+
+
+class TestVlnApiLogicVerfahren(unittest.TestCase):
+
+    def _make_authenticated(self):
+        from sn_plan41.modules.vln_api_logic import VlnApiLogic
+
+        with patch("sn_plan41.modules.vln_api_logic.QSettings"):
+            with patch("sn_plan41.modules.vln_api_logic.KartenApiClient"):
+                logic = VlnApiLogic()
+
+        mock_client = MagicMock()
+        mock_client.is_authenticated = True
+        logic._client = mock_client
+        return logic, mock_client
+
+    def test_get_verfahren_raises_when_not_authenticated(self):
+        from sn_plan41.modules.vln_api_logic import VlnApiLogic
+
+        with patch("sn_plan41.modules.vln_api_logic.QSettings"):
+            with patch("sn_plan41.modules.vln_api_logic.KartenApiClient"):
+                logic = VlnApiLogic()
+        logic._client = None
+
+        with self.assertRaises(Exception):
+            logic.get_verfahren()
+
+    def test_get_verfahren_delegates_to_client(self):
+        logic, mock_client = self._make_authenticated()
+        mock_client.get_verfahren.return_value = [
+            {"vkz": "27010", "name": "Alpha"},
+            {"vkz": "27001", "name": "Beta"},
+        ]
+        result = logic.get_verfahren()
+        mock_client.get_verfahren.assert_called_once()
+        self.assertEqual(len(result), 2)
+
+
+# ---------------------------------------------------------------------------
+# Tests: VKZ-Persistenz
+# ---------------------------------------------------------------------------
+
+
+class TestVlnApiLogicVkz(unittest.TestCase):
+
+    def _make(self):
+        from sn_plan41.modules.vln_api_logic import VlnApiLogic
+
+        with patch("sn_plan41.modules.vln_api_logic.QSettings"):
+            with patch("sn_plan41.modules.vln_api_logic.KartenApiClient"):
+                return VlnApiLogic()
+
+    def test_load_stored_vkz_reads_from_project(self):
+        logic = self._make()
+        mock_project = MagicMock()
+        mock_project.readEntry.return_value = ("27010", True)
+
+        with patch("sn_plan41.modules.vln_api_logic.QgsProject") as mock_qgsproj_cls:
+            mock_qgsproj_cls.instance.return_value = mock_project
+            vkz = logic.load_stored_vkz()
+
+        self.assertEqual(vkz, "27010")
+        mock_project.readEntry.assert_called_once_with("vln_karten", "/vkz", "")
+
+    def test_load_stored_vkz_returns_none_for_empty(self):
+        logic = self._make()
+        mock_project = MagicMock()
+        mock_project.readEntry.return_value = ("", True)
+
+        with patch("sn_plan41.modules.vln_api_logic.QgsProject") as mock_qgsproj_cls:
+            mock_qgsproj_cls.instance.return_value = mock_project
+            vkz = logic.load_stored_vkz()
+
+        self.assertIsNone(vkz)
+
+    def test_save_vkz_writes_to_project(self):
+        logic = self._make()
+        mock_project = MagicMock()
+
+        with patch("sn_plan41.modules.vln_api_logic.QgsProject") as mock_qgsproj_cls:
+            mock_qgsproj_cls.instance.return_value = mock_project
+            logic.save_vkz("27010")
+
+        mock_project.writeEntry.assert_called_once_with("vln_karten", "/vkz", "27010")
+
+    def test_save_vkz_does_nothing_for_none(self):
+        logic = self._make()
+        mock_project = MagicMock()
+
+        with patch("sn_plan41.modules.vln_api_logic.QgsProject") as mock_qgsproj_cls:
+            mock_qgsproj_cls.instance.return_value = mock_project
+            logic.save_vkz(None)
+
+        mock_project.writeEntry.assert_not_called()
+
+
+# ---------------------------------------------------------------------------
+# Tests: Plan 41 laden (Stil-Anwendung)
+# ---------------------------------------------------------------------------
+
+
+class TestVlnApiLogicLoadP41(unittest.TestCase):
+
+    def _make(self):
+        from sn_plan41.modules.vln_api_logic import VlnApiLogic
+
+        with patch("sn_plan41.modules.vln_api_logic.QSettings"):
+            with patch("sn_plan41.modules.vln_api_logic.KartenApiClient"):
+                logic = VlnApiLogic()
+
+        mock_client = MagicMock()
+        mock_client.is_authenticated = True
+        mock_client.load_layer_complete.return_value = {
+            "type": "FeatureCollection",
+            "features": [],
+        }
+        logic._client = mock_client
+        return logic
+
+    def test_load_p41_raises_without_vln_karten(self):
+        import sn_plan41.modules.vln_api_logic as module
+        logic = self._make()
+        with patch.object(module, "VLN_KARTEN_AVAILABLE", False):
+            with self.assertRaises(RuntimeError):
+                logic.load_p41("27010")
+
+    def test_load_p41_applies_styles_to_polygon_and_line_layers(self):
+        import sn_plan41.modules.vln_api_logic as module
+        if not module.VLN_KARTEN_AVAILABLE:
+            self.skipTest("vln_karten nicht verfügbar")
+
+        logic = self._make()
+
+        # Zwei Mock-Layer: einer Polygon (2), einer Linie (1)
+        mock_layer_polygon = MagicMock()
+        mock_layer_polygon.geometryType.return_value = module._GEOM_POLYGON
+
+        mock_layer_line = MagicMock()
+        mock_layer_line.geometryType.return_value = module._GEOM_LINE
+
+        with patch(
+            "sn_plan41.modules.vln_api_logic.feature_collection_to_layers",
+            return_value=[mock_layer_polygon, mock_layer_line],
+        ):
+            with patch(
+                "sn_plan41.modules.vln_api_logic.apply_style_from_path"
+            ) as mock_style:
+                with patch("sn_plan41.modules.vln_api_logic.join_path", side_effect=lambda *p: "/".join(p)):
+                    with patch("sn_plan41.modules.vln_api_logic.get_plugin_root", return_value="/plugins"):
+                        logic.load_p41("27010")
+
+        # Prüfen, dass der richtige Stil für jeden Geometrietyp verwendet wurde
+        style_calls = [str(c) for c in mock_style.call_args_list]
+        polygon_style_used = any(
+            module.STYLE_FLAECHE in c for c in style_calls
+        )
+        line_style_used = any(
+            module.STYLE_LINIE in c for c in style_calls
+        )
+        self.assertTrue(polygon_style_used, "Flächen-Stil wurde nicht angewendet")
+        self.assertTrue(line_style_used, "Linien-Stil wurde nicht angewendet")
+
+    def test_load_p41_no_style_for_point_layer(self):
+        import sn_plan41.modules.vln_api_logic as module
+        if not module.VLN_KARTEN_AVAILABLE:
+            self.skipTest("vln_karten nicht verfügbar")
+
+        logic = self._make()
+
+        mock_layer_point = MagicMock()
+        mock_layer_point.geometryType.return_value = 0  # Point
+
+        with patch(
+            "sn_plan41.modules.vln_api_logic.feature_collection_to_layers",
+            return_value=[mock_layer_point],
+        ):
+            with patch(
+                "sn_plan41.modules.vln_api_logic.apply_style_from_path"
+            ) as mock_style:
+                with patch("sn_plan41.modules.vln_api_logic.join_path", side_effect=lambda *p: "/".join(p)):
+                    with patch("sn_plan41.modules.vln_api_logic.get_plugin_root", return_value="/plugins"):
+                        logic.load_p41("27010")
+
+        mock_style.assert_not_called()
+
+
+# ---------------------------------------------------------------------------
+# Tests: Upload
+# ---------------------------------------------------------------------------
+
+
+class TestVlnApiLogicUpload(unittest.TestCase):
+
+    def _make(self):
+        from sn_plan41.modules.vln_api_logic import VlnApiLogic
+
+        with patch("sn_plan41.modules.vln_api_logic.QSettings"):
+            with patch("sn_plan41.modules.vln_api_logic.KartenApiClient"):
+                logic = VlnApiLogic()
+
+        mock_client = MagicMock()
+        mock_client.is_authenticated = True
+        logic._client = mock_client
+        return logic
+
+    def test_upload_returns_error_for_layer_without_api_path(self):
+        import sn_plan41.modules.vln_api_logic as module
+        if not module.VLN_KARTEN_AVAILABLE:
+            self.skipTest("vln_karten nicht verfügbar")
+
+        logic = self._make()
+        mock_layer = MagicMock()
+
+        with patch(
+            "sn_plan41.modules.vln_api_logic.layer_api_path", return_value=None
+        ):
+            success, message = logic.upload_active_layer(mock_layer)
+
+        self.assertFalse(success)
+        self.assertIn("nicht", message.lower())
+
+    def test_upload_returns_error_for_none_layer(self):
+        import sn_plan41.modules.vln_api_logic as module
+        if not module.VLN_KARTEN_AVAILABLE:
+            self.skipTest("vln_karten nicht verfügbar")
+
+        logic = self._make()
+        with patch(
+            "sn_plan41.modules.vln_api_logic.layer_api_path", return_value=None
+        ):
+            success, message = logic.upload_active_layer(None)
+
+        self.assertFalse(success)
+
+    def test_upload_returns_false_without_qgis_modules(self):
+        import sn_plan41.modules.vln_api_logic as module
+        logic = self._make()
+        with patch.object(module, "VLN_KARTEN_AVAILABLE", False):
+            success, message = logic.upload_active_layer(MagicMock())
+
+        self.assertFalse(success)
+
+    def test_upload_calls_save_feature_collection(self):
+        import sn_plan41.modules.vln_api_logic as module
+        if not module.VLN_KARTEN_AVAILABLE:
+            self.skipTest("vln_karten nicht verfügbar")
+
+        logic = self._make()
+
+        mock_layer = MagicMock()
+        mock_layer.isEditable.return_value = False
+        mock_layer.featureCount.return_value = 5
+
+        fc = {"type": "FeatureCollection", "features": []}
+
+        with patch("sn_plan41.modules.vln_api_logic.layer_api_path", return_value="/maps/p41/27010"):
+            with patch("sn_plan41.modules.vln_api_logic.plugin_layers", return_value=[mock_layer]):
+                with patch("sn_plan41.modules.vln_api_logic.layers_to_feature_collection", return_value=fc):
+                    success, message = logic.upload_active_layer(mock_layer)
+
+        logic._client.save_feature_collection.assert_called_once_with("/maps/p41/27010", fc)
+        self.assertTrue(success)
+
+
+if __name__ == "__main__":
+    unittest.main()

ui/tab_a_ui.py

@@ -9,7 +9,9 @@ from typing import Optional
 from sn_basis.functions.qt_wrapper import (
     QWidget,
     QVBoxLayout,
+    QHBoxLayout,
     QLabel,
+    QLineEdit,
     QPushButton,
     QToolButton,
     QFileDialog,
@@ -33,6 +35,7 @@ from sn_basis.modules.Dateipruefer import Dateipruefer
 from sn_plan41.ui.tab_a_logic import TabALogic
 from sn_basis.modules.linkpruefer import Linkpruefer
 from sn_basis.modules.stilpruefer import Stilpruefer
+from sn_plan41.modules.vln_api_logic import VlnApiLogic
 
 # Konstanten
 RAUMFILTER_VAR = "Raumfilter"
@@ -79,6 +82,10 @@ class TabA(QWidget):
         # UI-Referenzen
         self._raumfilter_combo: Optional[QComboBox] = None
 
+        # VLN-API
+        self.vln_logic: Optional[VlnApiLogic] = None
+        self._vln_restoring: bool = False
+
         self._build_ui()
         self._restore_state()
 
@@ -92,14 +99,17 @@ class TabA(QWidget):
         self.pruefmanager = pruefmanager
         self.data_grabber = data_grabber
         self.logic = TabALogic(
-        pruefmanager=self.pruefmanager,
+            pruefmanager=self.pruefmanager,
-        link_pruefer=Linkpruefer(),
+            link_pruefer=Linkpruefer(),
-        stil_pruefer=Stilpruefer(),
+            stil_pruefer=Stilpruefer(),
-    )
+        )
-
-    # DataGrabber in die Logik injizieren
         self.logic.data_grabber = self.data_grabber
 
+        # VLN-API-Logik initialisieren
+        self.vln_logic = VlnApiLogic(self.pruefmanager)
+        self._update_vln_ui_state()
+        self._restore_vln_state()
+
     def _build_ui(self) -> None:
         """Erstellt die komplette UI-Hierarchie mit allen Gruppen."""
         main_layout = QVBoxLayout()
@@ -180,6 +190,83 @@ class TabA(QWidget):
         self.btn_pipeline.clicked.connect(self._on_load_fachdaten)
         main_layout.addWidget(self.btn_pipeline)
 
+        # === VLN API / PLAN 41 ===
+        self._vln_group_button = QToolButton()
+        self._vln_group_button.setText("VLN API / Plan 41")
+        self._vln_group_button.setCheckable(True)
+        self._vln_group_button.setChecked(False)
+        self._vln_group_button.setToolButtonStyle(ToolButtonTextBesideIcon)
+        self._vln_group_button.setArrowType(ArrowRight)
+        self._vln_group_button.setStyleSheet("font-weight: bold; margin-top: 8px;")
+        self._vln_group_button.toggled.connect(self._toggle_vln_group)
+        main_layout.addWidget(self._vln_group_button)
+
+        self._vln_group_content = QWidget()
+        self._vln_group_content.setSizePolicy(SizePolicyPreferred, SizePolicyMaximum)
+        vln_layout = QVBoxLayout()
+        vln_layout.setSpacing(4)
+        vln_layout.setContentsMargins(10, 4, 4, 8)
+
+        # Status
+        self._vln_status_label = QLabel("Nicht angemeldet")
+        self._vln_status_label.setStyleSheet("color: gray; font-style: italic;")
+        vln_layout.addWidget(self._vln_status_label)
+
+        # E-Mail und Passwort
+        vln_layout.addWidget(QLabel("E-Mail:"))
+        self._vln_mail_edit = QLineEdit()
+        self._vln_mail_edit.setPlaceholderText("mail@beispiel.de")
+        vln_layout.addWidget(self._vln_mail_edit)
+
+        vln_layout.addWidget(QLabel("Passwort:"))
+        self._vln_pass_edit = QLineEdit()
+        try:
+            self._vln_pass_edit.setEchoMode(QLineEdit.EchoMode.Password)
+        except AttributeError:
+            self._vln_pass_edit.setEchoMode(QLineEdit.Password)
+        vln_layout.addWidget(self._vln_pass_edit)
+
+        # Login / Logout Buttons
+        btn_row = QHBoxLayout()
+        self._btn_vln_login = QPushButton("Anmelden")
+        self._btn_vln_login.clicked.connect(self._on_vln_login)
+        self._btn_vln_logout = QPushButton("Abmelden")
+        self._btn_vln_logout.clicked.connect(self._on_vln_logout)
+        btn_row.addWidget(self._btn_vln_login)
+        btn_row.addWidget(self._btn_vln_logout)
+        vln_layout.addLayout(btn_row)
+
+        # Verfahren
+        vln_layout.addWidget(QLabel("Verfahren:"))
+        self._vln_verfahren_combo = QComboBox()
+        self._vln_verfahren_combo.setToolTip("Verfahren (Teilnehmergemeinschaft) wählen")
+        self._vln_verfahren_combo.setEnabled(False)
+        self._vln_verfahren_combo.currentIndexChanged.connect(
+            self._on_vln_verfahren_changed
+        )
+        vln_layout.addWidget(self._vln_verfahren_combo)
+
+        # Plan 41 laden
+        self._btn_p41_laden = QPushButton("Plan 41 (Wege- und Gewässerplan) laden")
+        self._btn_p41_laden.setToolTip(
+            "Lädt Flächen- und Linienlayer für das gewählte Verfahren vom Server"
+        )
+        self._btn_p41_laden.setEnabled(False)
+        self._btn_p41_laden.clicked.connect(self._on_p41_laden)
+        vln_layout.addWidget(self._btn_p41_laden)
+
+        # Upload
+        self._btn_upload = QPushButton("Aktiven Layer hochladen")
+        self._btn_upload.setToolTip(
+            "Lädt alle Plan-41-Layer des aktiven Verfahrens zum Server hoch"
+        )
+        self._btn_upload.setEnabled(False)
+        self._btn_upload.clicked.connect(self._on_upload_active)
+        vln_layout.addWidget(self._btn_upload)
+
+        self._vln_group_content.setLayout(vln_layout)
+        self._vln_group_content.setVisible(False)
+        main_layout.addWidget(self._vln_group_content)
 
         main_layout.addStretch(1)
         self.setLayout(main_layout)
@@ -206,7 +293,279 @@ class TabA(QWidget):
             pass
         # Raumfilter (schon im _build_ui behandelt)
 
+    def _restore_vln_state(self) -> None:
+        """Stellt die zuletzt gewählte VKZ aus der Projektdatei wieder her."""
+        if self.vln_logic is None or not self.vln_logic.is_authenticated:
+            return
+        try:
+            self._populate_verfahren_combo(restore_vkz=True)
+        except Exception:
+            pass
+
     # === UI CALLBACKS ===
+
+    def _toggle_vln_group(self, checked: bool) -> None:
+        self._vln_group_button.setArrowType(ArrowDown if checked else ArrowRight)
+        self._vln_group_content.setVisible(checked)
+
+    def _update_vln_ui_state(self) -> None:
+        """Passt alle VLN-Controls an den aktuellen Authentifizierungsstatus an."""
+        if self.vln_logic is None:
+            authenticated = False
+            available = False
+        else:
+            authenticated = self.vln_logic.is_authenticated
+            available = self.vln_logic.is_available()
+
+        if not available:
+            self._vln_status_label.setText(
+                "Plugin 'vln_karten' nicht installiert"
+            )
+            self._vln_status_label.setStyleSheet("color: red; font-style: italic;")
+            self._btn_vln_login.setEnabled(False)
+        elif authenticated:
+            mail = (self.vln_logic.mail or "API-Key") if self.vln_logic else ""
+            self._vln_status_label.setText("Angemeldet: %s" % mail)
+            self._vln_status_label.setStyleSheet(
+                "color: green; font-style: italic;"
+            )
+            self._btn_vln_login.setEnabled(False)
+        else:
+            self._vln_status_label.setText("Nicht angemeldet")
+            self._vln_status_label.setStyleSheet("color: gray; font-style: italic;")
+            self._btn_vln_login.setEnabled(True)
+
+        self._btn_vln_logout.setEnabled(authenticated)
+        self._vln_verfahren_combo.setEnabled(authenticated)
+        vkz_chosen = (
+            authenticated
+            and self._vln_verfahren_combo.currentData() is not None
+        )
+        self._btn_p41_laden.setEnabled(vkz_chosen)
+        self._btn_upload.setEnabled(authenticated)
+
+    def _populate_verfahren_combo(self, restore_vkz: bool = False) -> None:
+        """Füllt die Verfahren-Combo und wählt ggf. die gespeicherte VKZ."""
+        if self.vln_logic is None:
+            return
+        verfahren = self.vln_logic.get_verfahren()
+        self._vln_restoring = True
+        self._vln_verfahren_combo.clear()
+        self._vln_verfahren_combo.addItem("— Verfahren wählen —", None)
+        for v in verfahren:
+            label = (
+                "%s — %s" % (v["vkz"], v["name"])
+                if v["name"]
+                else v["vkz"]
+            )
+            self._vln_verfahren_combo.addItem(label, v["vkz"])
+        self._vln_restoring = False
+
+        if restore_vkz:
+            stored_vkz = self.vln_logic.load_stored_vkz()
+            if stored_vkz:
+                idx = self._vln_verfahren_combo.findData(stored_vkz)
+                if idx >= 0:
+                    self._vln_verfahren_combo.setCurrentIndex(idx)
+
+        self._vln_verfahren_combo.setEnabled(True)
+        self._update_vln_ui_state()
+
+    def _on_vln_login(self) -> None:
+        """Führt den API-Login durch."""
+        if self.vln_logic is None:
+            return
+        mail = self._vln_mail_edit.text().strip()
+        password = self._vln_pass_edit.text()
+        if not mail or not password:
+            QMessageBox.warning(
+                self,
+                "Anmeldung",
+                "Bitte E-Mail-Adresse und Passwort eingeben.",
+            )
+            return
+        try:
+            self.vln_logic.login(mail, password)
+        except Exception as exc:
+            QMessageBox.warning(self, "Anmeldung fehlgeschlagen", str(exc))
+            return
+
+        self._vln_pass_edit.clear()
+        try:
+            self._populate_verfahren_combo(restore_vkz=True)
+        except Exception as exc:
+            QMessageBox.warning(
+                self,
+                "Verfahrensliste",
+                "Anmeldung erfolgreich, aber Verfahrensliste konnte nicht "
+                "geladen werden: %s" % exc,
+            )
+        self._update_vln_ui_state()
+
+    def _on_vln_logout(self) -> None:
+        """Meldet den Benutzer lokal ab."""
+        if self.vln_logic is None:
+            return
+        self.vln_logic.logout()
+        self._vln_restoring = True
+        self._vln_verfahren_combo.clear()
+        self._vln_verfahren_combo.setEnabled(False)
+        self._vln_restoring = False
+        self._update_vln_ui_state()
+
+    def _on_vln_verfahren_changed(self, _index: int) -> None:
+        """Persistiert die gewählte VKZ."""
+        if self._vln_restoring or self.vln_logic is None:
+            return
+        vkz = self._vln_verfahren_combo.currentData()
+        self.vln_logic.save_vkz(vkz)
+        self._update_vln_ui_state()
+
+    def _on_p41_laden(self) -> None:
+        """Lädt den Plan-41-Datensatz für die gewählte VKZ."""
+        if self.vln_logic is None:
+            return
+        vkz = self._vln_verfahren_combo.currentData()
+        if not vkz:
+            QMessageBox.warning(
+                self, "Plan 41 laden", "Bitte zuerst ein Verfahren wählen."
+            )
+            return
+
+        # Bereits geladene Layer prüfen
+        existing = self.vln_logic.get_p41_layers(vkz)
+        if existing:
+            try:
+                answer = QMessageBox.question(
+                    self,
+                    "Layer ersetzen",
+                    "Plan 41 für VKZ %s ist bereits geladen.\n"
+                    "Beim Neuladen werden die bestehenden Layer ersetzt. Fortfahren?"
+                    % vkz,
+                )
+                # Qt6: StandardButton.Yes, Qt5: QMessageBox.Yes
+                yes = getattr(
+                    getattr(QMessageBox, "StandardButton", QMessageBox),
+                    "Yes",
+                    QMessageBox.Yes if hasattr(QMessageBox, "Yes") else None,
+                )
+                if answer != yes:
+                    return
+            except Exception:
+                pass
+            self.vln_logic.remove_p41_layers(vkz)
+
+        try:
+            layers = self.vln_logic.load_p41(vkz)
+        except Exception as exc:
+            # AuthError: Sitzung abgelaufen
+            try:
+                from sn_plan41.modules.vln_api_client import AuthError as _AuthError
+                if isinstance(exc, _AuthError):
+                    self.vln_logic.handle_session_expired()
+                    self._on_vln_logout()
+                    QMessageBox.warning(
+                        self,
+                        "Sitzung abgelaufen",
+                        "Der API-Key ist nicht mehr gültig — bitte neu anmelden.",
+                    )
+                    return
+            except ImportError:
+                pass
+            QMessageBox.warning(self, "Laden fehlgeschlagen", str(exc))
+            return
+
+        total = sum(l.featureCount() for l in layers)
+        detail = ", ".join(
+            "%s: %d" % (l.name(), l.featureCount()) for l in layers
+        )
+        if total == 0:
+            QMessageBox.warning(
+                self,
+                "Plan 41 laden",
+                "Keine Objekte vorhanden — ein leerer Layer wurde angelegt.",
+            )
+        else:
+            try:
+                from sn_basis.functions.message_wrapper import info
+                info(
+                    "Plan 41 geladen",
+                    "%d Layer geladen (%s)." % (len(layers), detail),
+                )
+            except Exception:
+                pass
+
+    def _on_upload_active(self) -> None:
+        """Lädt den aktiven Layer (und Geschwister-Layer) zum Server hoch."""
+        if self.vln_logic is None:
+            return
+
+        # Zusammenfassung für Bestaetigungs-Dialog ermitteln
+        try:
+            from sn_basis.functions.qgisui_wrapper import iface as _iface
+            active_layer = _iface.activeLayer() if _iface else None
+        except Exception:
+            active_layer = None
+
+        summary = self.vln_logic.upload_summary(active_layer)
+        if summary is None:
+            QMessageBox.warning(
+                self,
+                "Hochladen nicht möglich",
+                "Der aktive Layer wurde nicht über 'vln_karten' geladen.",
+            )
+            return
+
+        try:
+            answer = QMessageBox.question(
+                self,
+                "Zum Server hochladen",
+                "%s für VKZ %s übertragen?\n\n%s\n\n"
+                "%d Objekte; der bisherige Bestand dieser VKZ wird ersetzt."
+                % (
+                    summary["dataset_label"],
+                    summary["vkz"],
+                    summary["listing"],
+                    summary["total"],
+                ),
+            )
+            yes = getattr(
+                getattr(QMessageBox, "StandardButton", QMessageBox),
+                "Yes",
+                QMessageBox.Yes if hasattr(QMessageBox, "Yes") else None,
+            )
+            if answer != yes:
+                return
+        except Exception:
+            return
+
+        try:
+            success, message = self.vln_logic.upload_active_layer(active_layer)
+        except Exception as exc:
+            try:
+                from sn_plan41.modules.vln_api_client import AuthError as _AuthError
+                if isinstance(exc, _AuthError):
+                    self.vln_logic.handle_session_expired()
+                    self._on_vln_logout()
+                    QMessageBox.warning(
+                        self,
+                        "Sitzung abgelaufen",
+                        "Der API-Key ist nicht mehr gültig — bitte neu anmelden.",
+                    )
+                    return
+            except ImportError:
+                pass
+            QMessageBox.warning(self, "Hochladen fehlgeschlagen", str(exc))
+            return
+
+        if success:
+            try:
+                from sn_basis.functions.message_wrapper import info
+                info("Upload erfolgreich", message)
+            except Exception:
+                pass
+        else:
+            QMessageBox.warning(self, "Hochladen fehlgeschlagen", message)
     def _toggle_group(self, checked: bool) -> None:
         """Zeigt/verbirgt Verfahrens-DB-Gruppe."""
         self.group_button.setArrowType(ArrowDown if checked else ArrowRight)