using z-value in floodwall from shp file (#427)

* using z-value in floodwall from shp file and convertin MultiLineString to LineString

* black

* addressing review comments

* address review comment: convert also z-values from shape file

* fixed unit conversion

* black

* include logging statement when height from shape file cannot be read

* black

* include positive logging info when height from shape is used

flood_adapt/integrator/sfincs_adapter.py

@@ -291,7 +291,29 @@ def add_floodwall(self, floodwall: FloodWallModel, measure_path=Path):
 
         # Add floodwall attributes to geodataframe
         gdf_floodwall["name"] = floodwall.name
-        gdf_floodwall["z"] = floodwall.elevation.convert(UnitTypesLength("meters"))
+        if (gdf_floodwall.geometry.type == "MultiLineString").any():
+            gdf_floodwall = gdf_floodwall.explode()
+        # TODO: Choice of height data from file or uniform height and column name with height data should be adjustable in the GUI
+        try:
+            heights = [
+                float(
+                    UnitfulLength(
+                        value=float(height),
+                        units=self.site.attrs.gui.default_length_units,
+                    ).convert(UnitTypesLength("meters"))
+                )
+                for height in gdf_floodwall["z"]
+            ]
+            gdf_floodwall["z"] = heights
+            logging.info("Using floodwall height from shape file.")
+        except Exception:
+            logging.warning(
+                f"""Could not use height data from file due to missing ""z""-column or missing values therein.\n
+                Using uniform height of {floodwall.elevation.convert(UnitTypesLength("meters"))} meters instead."""
+            )
+            gdf_floodwall["z"] = floodwall.elevation.convert(UnitTypesLength("meters"))
+
+        # par1 is the overflow coefficient for weirs
         gdf_floodwall["par1"] = 0.6
 
         # HydroMT function: create floodwall