Fix: revert building qgs Table

Author: rabii-chaarani

loopstructural/processing/algorithms/sampler.py

@@ -77,7 +77,8 @@ def initAlgorithm(self, config: Optional[dict[str, Any]] = None) -> None:
             QgsProcessingParameterEnum(
                 self.INPUT_SAMPLER_TYPE,
                 "SAMPLER_TYPE",
-                ["Decimator", "Spacing"],
+                ["Decimator (Point Geometry Data)", 
+                 "Spacing (Line Geometry Data)"],
                 defaultValue=0
             )
         )
@@ -112,7 +113,7 @@ def initAlgorithm(self, config: Optional[dict[str, Any]] = None) -> None:
         self.addParameter(
             QgsProcessingParameterNumber(
                 self.INPUT_DECIMATION,
-                "DECIMATION",
+                "DECIMATION (Point Geometry Data)",
                 QgsProcessingParameterNumber.Integer,
                 defaultValue=1,
                 optional=True,
@@ -122,7 +123,7 @@ def initAlgorithm(self, config: Optional[dict[str, Any]] = None) -> None:
         self.addParameter(
             QgsProcessingParameterNumber(
                 self.INPUT_SPACING,
-                "SPACING",
+                "SPACING (Line Geometry Data)",
                 QgsProcessingParameterNumber.Double,
                 defaultValue=200.0,
                 optional=True,
@@ -176,19 +177,11 @@ def processAlgorithm(
             samples = sampler.sample(spatial_data_gdf)
 
         fields = QgsFields()
-        if samples is not None and not samples.empty:
-            for column_name in samples.columns:
-                dtype = samples[column_name].dtype
-                dtype_str = str(dtype)
-            
-                if dtype_str in ['float16', 'float32', 'float64']:
-                    field_type = QVariant.Double
-                elif dtype_str in ['int8', 'int16', 'int32', 'int64']:
-                    field_type = QVariant.Int
-                else:
-                    field_type = QVariant.String
-                
-                fields.append(QgsField(column_name, field_type))
+        fields.append(QgsField("ID", QVariant.String))
+        fields.append(QgsField("X", QVariant.Double))
+        fields.append(QgsField("Y", QVariant.Double))
+        fields.append(QgsField("Z", QVariant.Double))
+        fields.append(QgsField("featureId", QVariant.String))
 
         crs = None
         if spatial_data_gdf is not None and spatial_data_gdf.crs is not None:
@@ -215,21 +208,13 @@ def processAlgorithm(
                     #spacing has no z values
                     feature.setGeometry(QgsGeometry.fromPointXY(QgsPointXY(row['X'], row['Y'])))
 
-                attributes = []
-                for column_name in samples.columns:
-                    value = row.get(column_name)
-                    dtype = samples[column_name].dtype
-                    
-                    if pd.isna(value):
-                        attributes.append(None)
-                    elif dtype in ['float16', 'float32', 'float64']:
-                        attributes.append(float(value))
-                    elif dtype in ['int8', 'int16', 'int32', 'int64']:
-                        attributes.append(int(value))
-                    else:
-                        attributes.append(str(value))
-                
-                feature.setAttributes(attributes)
+                feature.setAttributes([
+                    str(row.get('ID', '')),
+                    float(row.get('X', 0)),
+                    float(row.get('Y', 0)),
+                    float(row.get('Z', 0)) if pd.notna(row.get('Z')) else 0.0,
+                    str(row.get('featureId', ''))
+                ])
 
                 sink.addFeature(feature)