Dataset Group Remove Rename API

README.md

@@ -125,7 +125,7 @@ QGIS contains internal copy of MDAL library in following versions:
 | 3.30.0  | 1.0.2   | |
 | 3.36.0  | 1.1.0   | Mike21 format support read/write |
 | 3.38.0  | 1.2.0   | Groundwater / surface water meshes for 3Di format |
-| 3.42.0  | 1.3.0   | Fix 2dm format coordinates saving |
+| 3.42.0  | 1.3.0   | Fix 2dm format coordinates saving, Support Dataset Group Removal From Mesh |
 
 versions `X.Y.9Z` are development versions or alpha/beta releases (e.g. `0.4.90`, `0.4.91`, ...)
 

mdal/api/mdal.h

@@ -442,6 +442,14 @@ MDAL_EXPORT MDAL_DatasetGroupH MDAL_M_addDatasetGroup(
   MDAL_DriverH driver,
   const char *datasetGroupFile );
 
+/**
+ * Removes DatasetGroup from Mesh based on it's index. On error see MDAL_LastStatus
+ * for error type.
+ *
+ * \since MDAL 1.3.0
+ */
+MDAL_EXPORT void MDAL_M_RemoveDatasetGroup( MDAL_MeshH mesh, int index );
+
 /**
  * Returns name of MDAL driver
  * not thread-safe and valid only till next call
@@ -587,6 +595,13 @@ MDAL_EXPORT void MDAL_G_setMetadata( MDAL_DatasetGroupH group, const char *key,
  */
 MDAL_EXPORT const char *MDAL_G_name( MDAL_DatasetGroupH group );
 
+/**
+ * Sets dataset group name
+ *
+ * \since MDAL 1.3.0
+ */
+MDAL_EXPORT void MDAL_G_setName( MDAL_DatasetGroupH group, const char *name );
+
 /**
  * Returns name of MDAL driver
  * not thread-safe and valid only till next call

mdal/mdal.cpp

@@ -580,6 +580,34 @@ MDAL_DatasetGroupH MDAL_M_addDatasetGroup(
     return nullptr;
 }
 
+void MDAL_M_RemoveDatasetGroup( MDAL_MeshH mesh, int index )
+{
+  MDAL::Log::resetLastStatus();
+
+  if ( !mesh )
+  {
+    MDAL::Log::error( MDAL_Status::Err_IncompatibleMesh, "Mesh is not valid (null)" );
+    return;
+  }
+
+  if ( index < 0 )
+  {
+    MDAL::Log::error( MDAL_Status::Err_IncompatibleMesh, "Requested index is not valid: " + std::to_string( index ) );
+    return;
+  }
+
+  MDAL::Mesh *m = static_cast< MDAL::Mesh * >( mesh );
+  int len = static_cast<int>( m->datasetGroups.size() );
+  if ( len <= index )
+  {
+    MDAL::Log::error( MDAL_Status::Err_IncompatibleMesh, "Requested index " + std::to_string( index ) + " is bigger than datasets count" );
+    return;
+  }
+  size_t i = static_cast<size_t>( index );
+
+  m->datasetGroups.erase( m->datasetGroups.begin() + i );
+}
+
 const char *MDAL_M_driverName( MDAL_MeshH mesh )
 {
   if ( !mesh )
@@ -847,6 +875,18 @@ const char *MDAL_G_name( MDAL_DatasetGroupH group )
   return _return_str( g->name() );
 }
 
+void MDAL_G_setName( MDAL_DatasetGroupH group, const char *name )
+{
+  if ( !group )
+  {
+    MDAL::Log::error( MDAL_Status::Err_IncompatibleDataset, "Dataset Group is not valid (null)" );
+    return;
+  }
+
+  MDAL::DatasetGroup *g = static_cast< MDAL::DatasetGroup * >( group );
+  g->setName( name );
+}
+
 bool MDAL_G_hasScalarData( MDAL_DatasetGroupH group )
 {
   if ( !group )

tests/test_api.cpp

@@ -635,6 +635,101 @@ TEST( ApiTest, MeshCreationApi )
   EXPECT_EQ( std::strcmp( MDAL_DR_saveMeshSuffix( driver ), "slf" ), 0 );
 }
 
+TEST( ApiTest, DatasetRemoval )
+{
+  MDAL_SetLoggerCallback( &_testLoggerCallback );
+
+  std::string meshFile = test_file( "/2dm/quad_and_line.2dm" );
+  MDAL_MeshH m = MDAL_LoadMesh( meshFile.c_str() );
+  EXPECT_NE( m, nullptr );
+  MDAL_Status s = MDAL_LastStatus();
+  EXPECT_EQ( MDAL_Status::None, s );
+  ASSERT_EQ( 2, MDAL_M_datasetGroupCount( m ) );
+
+  std::string vertexPath = test_file( "/ascii_dat/quad_and_triangle_vertex_scalar.dat" );
+
+  // add the same dataset multiple times
+  MDAL_M_LoadDatasets( m, vertexPath.c_str() );
+  s = MDAL_LastStatus();
+  EXPECT_EQ( MDAL_Status::None, s );
+  ASSERT_EQ( 3, MDAL_M_datasetGroupCount( m ) );
+
+  MDAL_M_LoadDatasets( m, vertexPath.c_str() );
+  s = MDAL_LastStatus();
+  EXPECT_EQ( MDAL_Status::None, s );
+  ASSERT_EQ( 4, MDAL_M_datasetGroupCount( m ) );
+
+  MDAL_M_LoadDatasets( m, vertexPath.c_str() );
+  s = MDAL_LastStatus();
+  EXPECT_EQ( MDAL_Status::None, s );
+  ASSERT_EQ( 5, MDAL_M_datasetGroupCount( m ) );
+
+  // try to remove from bad mesh
+  MDAL_M_RemoveDatasetGroup( nullptr, -1 );
+  s = MDAL_LastStatus();
+  EXPECT_EQ( MDAL_Status::Err_IncompatibleMesh, s );
+
+  // remove non existing dataset
+  MDAL_M_RemoveDatasetGroup( m, -1 );
+  s = MDAL_LastStatus();
+  EXPECT_EQ( MDAL_Status::Err_IncompatibleMesh, s );
+  ASSERT_EQ( 5, MDAL_M_datasetGroupCount( m ) );
+
+  // remove non existing dataset
+  MDAL_M_RemoveDatasetGroup( m, 99 );
+  s = MDAL_LastStatus();
+  EXPECT_EQ( MDAL_Status::Err_IncompatibleMesh, s );
+  ASSERT_EQ( 5, MDAL_M_datasetGroupCount( m ) );
+
+  // remove existing dataset
+  MDAL_M_RemoveDatasetGroup( m, 3 );
+  s = MDAL_LastStatus();
+  EXPECT_EQ( MDAL_Status::None, s );
+  ASSERT_EQ( 4, MDAL_M_datasetGroupCount( m ) );
+
+  // remove existing dataset
+  MDAL_M_RemoveDatasetGroup( m, 3 );
+  s = MDAL_LastStatus();
+  EXPECT_EQ( MDAL_Status::None, s );
+  ASSERT_EQ( 3, MDAL_M_datasetGroupCount( m ) );
+
+  // remove existing dataset
+  MDAL_M_RemoveDatasetGroup( m, 2 );
+  s = MDAL_LastStatus();
+  EXPECT_EQ( MDAL_Status::None, s );
+  ASSERT_EQ( 2, MDAL_M_datasetGroupCount( m ) );
+
+  MDAL_CloseMesh( m );
+}
+
+TEST( ApiTest, DatasetGroupSetName )
+{
+  std::string path = test_file( "/2dm/regular_grid.2dm" );
+  MDAL_MeshH m = MDAL_LoadMesh( path.c_str() );
+  EXPECT_NE( m, nullptr );
+  MDAL_Status s = MDAL_LastStatus();
+  ASSERT_EQ( MDAL_Status::None, s );
+  ASSERT_EQ( MDAL_M_datasetGroupCount( m ), 1 );
+
+  // get group and test name
+  MDAL_DatasetGroupH g = MDAL_M_datasetGroup( m, 0 );
+
+  std::string name = std::string( MDAL_G_name( g ) );
+  ASSERT_EQ( name, "Bed Elevation" );
+
+  // set new name
+  std::string newName = "Z-Value";
+  MDAL_G_setName( g, newName.c_str() );
+
+  // get the group again and test if the name is changed
+  MDAL_DatasetGroupH g1 = MDAL_M_datasetGroup( m, 0 );
+
+  name = std::string( MDAL_G_name( g1 ) );
+  ASSERT_EQ( name, newName );
+
+  MDAL_CloseMesh( m );
+}
+
 int main( int argc, char **argv )
 {
   testing::InitGoogleTest( &argc, argv );