[FEATURE] Remove Singleparts to Multiparts algorithm

This algorithm is no longer required - it's been replaced by
the 'Promote to multipart' and 'Collect geometries" algorithms.

Tagged as feature to remember to include in release notes

python/plugins/processing/algs/help/qgis.yaml

@@ -544,9 +544,6 @@ qgis:simplifygeometries: >
 
   The algorithm gives a choice of simplification methods, including distance based (the "Douglas-Peucker" algorithm), area based ("Visvalingam" algorithm) and snapping geometries to grid.
 
-qgis:singlepartstomultipart:
-
-
 qgis:singlesidedbuffer: >
   This algorithm buffers lines by a specified distance on one side of the line only.
 

python/plugins/processing/algs/qgis/QGISAlgorithmProvider.py

@@ -144,7 +144,6 @@ from .ShortestPathLayerToPoint import ShortestPathLayerToPoint
 from .ShortestPathPointToLayer import ShortestPathPointToLayer
 from .ShortestPathPointToPoint import ShortestPathPointToPoint
 from .SimplifyGeometries import SimplifyGeometries
-from .SinglePartsToMultiparts import SinglePartsToMultiparts
 from .SingleSidedBuffer import SingleSidedBuffer
 from .Slope import Slope
 from .Smooth import Smooth
@@ -292,7 +291,6 @@ class QGISAlgorithmProvider(QgsProcessingProvider):
                 ShortestPathPointToLayer(),
                 ShortestPathPointToPoint(),
                 SimplifyGeometries(),
-                SinglePartsToMultiparts(),
                 SingleSidedBuffer(),
                 Slope(),
                 Smooth(),

python/plugins/processing/algs/qgis/SinglePartsToMultiparts.py

@@ -1,123 +0,0 @@
-# -*- coding: utf-8 -*-
-
-"""
-***************************************************************************
-    SinglePartsToMultiparts.py
-    ---------------------
-    Date                 : August 2012
-    Copyright            : (C) 2012 by Victor Olaya
-    Email                : volayaf at gmail dot com
-***************************************************************************
-*                                                                         *
-*   This program is free software; you can redistribute it and/or modify  *
-*   it under the terms of the GNU General Public License as published by  *
-*   the Free Software Foundation; either version 2 of the License, or     *
-*   (at your option) any later version.                                   *
-*                                                                         *
-***************************************************************************
-"""
-from builtins import str
-
-__author__ = 'Victor Olaya'
-__date__ = 'August 2012'
-__copyright__ = '(C) 2012, Victor Olaya'
-
-# This will get replaced with a git SHA1 when you do a git archive
-
-__revision__ = '$Format:%H$'
-
-import os
-
-from qgis.PyQt.QtGui import QIcon
-
-from qgis.core import (QgsFeature,
-                       QgsFeatureSink,
-                       QgsGeometry,
-                       QgsWkbTypes,
-                       QgsProcessingUtils,
-                       NULL,
-                       QgsProcessingParameterFeatureSource,
-                       QgsProcessingParameterField,
-                       QgsProcessingParameterFeatureSink)
-
-from processing.algs.qgis.QgisAlgorithm import QgisAlgorithm
-
-pluginPath = os.path.split(os.path.split(os.path.dirname(__file__))[0])[0]
-
-
-class SinglePartsToMultiparts(QgisAlgorithm):
-
-    INPUT = 'INPUT'
-    FIELD = 'FIELD'
-    OUTPUT = 'OUTPUT'
-
-    def icon(self):
-        return QIcon(os.path.join(pluginPath, 'images', 'ftools', 'single_to_multi.png'))
-
-    def group(self):
-        return self.tr('Vector geometry')
-
-    def __init__(self):
-        super().__init__()
-
-    def initAlgorithm(self, config=None):
-        self.addParameter(QgsProcessingParameterFeatureSource(self.INPUT,
-                                                              self.tr('Input layer')))
-        self.addParameter(QgsProcessingParameterField(self.FIELD,
-                                                      self.tr('Unique ID field'), parentLayerParameterName=self.INPUT))
-
-        self.addParameter(QgsProcessingParameterFeatureSink(self.OUTPUT, self.tr('Multipart')))
-
-    def name(self):
-        return 'singlepartstomultipart'
-
-    def displayName(self):
-        return self.tr('Singleparts to multipart')
-
-    def processAlgorithm(self, parameters, context, feedback):
-        source = self.parameterAsSource(parameters, self.INPUT, context)
-        field_name = self.parameterAsString(parameters, self.FIELD, context)
-
-        geom_type = QgsWkbTypes.multiType(source.wkbType())
-
-        (sink, dest_id) = self.parameterAsSink(parameters, self.OUTPUT, context,
-                                               source.fields(), geom_type, source.sourceCrs())
-
-        index = source.fields().lookupField(field_name)
-
-        collection_geom = {}
-        collection_attrs = {}
-
-        features = source.getFeatures()
-        total = 100.0 / source.featureCount() if source.featureCount() else 0
-        for current, feature in enumerate(features):
-            if feedback.isCanceled():
-                break
-
-            atMap = feature.attributes()
-            idVar = atMap[index]
-            if idVar in [None, NULL] or not feature.hasGeometry():
-                sink.addFeature(feature, QgsFeatureSink.FastInsert)
-                feedback.setProgress(int(current * total))
-                continue
-
-            key = str(idVar).strip()
-            if key not in collection_geom:
-                collection_geom[key] = []
-                collection_attrs[key] = atMap
-
-            inGeom = feature.geometry()
-            collection_geom[key].append(inGeom)
-
-            feedback.setProgress(int(current * total))
-
-        for key, geoms in collection_geom.items():
-            if feedback.isCanceled():
-                break
-
-            feature = QgsFeature()
-            feature.setAttributes(collection_attrs[key])
-            feature.setGeometry(QgsGeometry.collectGeometry(geoms))
-            sink.addFeature(feature, QgsFeatureSink.FastInsert)
-
-        return {self.OUTPUT: dest_id}

python/plugins/processing/tests/testdata/qgis_algorithm_tests.yaml

@@ -2683,7 +2683,7 @@ tests:
         name: expected/mean_coordinates.gml
         type: vector
 
-  - algorithm: qgis:singlepartstomultipart
+  - algorithm: native:collect
     name: single part to multipart
     params:
       FIELD: id