Set the main owner for the attribution credits in layer properties

pg_metadata/dock.py

@@ -13,6 +13,7 @@
 
 from qgis.core import (
     NULL,
+    QgsAbstractDatabaseProviderConnection,
     QgsApplication,
     QgsProviderConnectionException,
     QgsProviderRegistry,
@@ -269,6 +270,7 @@ def layer_changed(self, layer):
 
             self.set_html_content(body=data[0][0])
             self.save_button.setEnabled(True)
+            self.set_layer_metadata(layer, connection, uri.schema(), uri.table())
             self.current_datasource_uri = uri
             self.current_connection = connection
 
@@ -314,3 +316,39 @@ def set_html_content(self, title=None, body=None):
     def default_html_content(self):
         self.set_html_content(
             'PgMetadata', tr('You should click on a layer in the legend which is stored in PostgreSQL.'))
+
+    @staticmethod
+    def set_layer_metadata(
+            layer: QgsVectorLayer,
+            connection: QgsAbstractDatabaseProviderConnection,
+            schema: str,
+            table: str,
+    ):
+        """ Set the main owner contact for the attribution. """
+        sql = (
+            "SELECT name FROM pgmetadata.v_contact "
+            f"WHERE table_name = '{table}' "
+            f"AND schema_name = '{schema}' "
+            "ORDER BY CASE "
+            "WHEN contact_role_code = 'OW' then 1 "
+            "WHEN contact_role_code = 'DI' then 2 "
+            "WHEN contact_role_code = 'CU' then 3 "
+            "ELSE 10 "
+            "END ASC "
+            "LIMIT 1;"
+        )
+
+        data = connection.executeSql(sql)
+        if not data:
+            return
+
+        if data[0] == NULL or data[0][0] == NULL:
+            return
+
+        # QGIS Server panel
+        layer.setAttribution(data[0][0])
+
+        # Metadata panel
+        metadata = layer.metadata()
+        metadata.setRights([data[0][0]])
+        layer.setMetadata(metadata)

pg_metadata/install/sql/pgmetadata/30_VIEW.sql

@@ -50,6 +50,7 @@ CREATE VIEW pgmetadata.v_contact AS
     c.organisation_name,
     c.organisation_unit,
     ((((glossary.dict -> 'contact.contact_role'::text) -> dc.contact_role) -> 'label'::text) ->> glossary.locale) AS contact_role,
+    dc.contact_role AS contact_role_code,
     c.email
    FROM glossary,
     ((pgmetadata.dataset_contact dc

pg_metadata/install/sql/upgrade/upgrade_to_0.4.0.sql

@@ -681,4 +681,33 @@ COMMENT ON FUNCTION pgmetadata.get_datasets_as_dcat_xml(_locale text) IS
 
 -- End DCAT
 
+-- Start contact role
+
+DROP VIEW IF EXISTS pgmetadata.v_contact;
+CREATE VIEW pgmetadata.v_contact AS
+ WITH glossary AS (
+         SELECT COALESCE(current_setting('pgmetadata.locale'::text, true), 'en'::text) AS locale,
+            v_glossary.dict
+           FROM pgmetadata.v_glossary
+        )
+ SELECT d.table_name,
+    d.schema_name,
+    c.name,
+    c.organisation_name,
+    c.organisation_unit,
+    ((((glossary.dict -> 'contact.contact_role'::text) -> dc.contact_role) -> 'label'::text) ->> glossary.locale) AS contact_role,
+    dc.contact_role AS contact_role_code,
+    c.email
+   FROM glossary,
+    ((pgmetadata.dataset_contact dc
+     JOIN pgmetadata.dataset d ON ((d.id = dc.fk_id_dataset)))
+     JOIN pgmetadata.contact c ON ((dc.fk_id_contact = c.id)))
+  WHERE true
+  ORDER BY dc.id;
+
+COMMENT ON VIEW pgmetadata.v_contact IS
+'Formatted version of contact data, with all the codes replaced by corresponding labels taken from pgmetadata.glossary. Used in the function in charge of building the HTML metadata content. The localized version of labels and descriptions are taken considering the session setting ''pgmetadata.locale''. For example with: SET SESSION "pgmetadata.locale" = ''fr''; ';
+
+-- End contact role
+
 COMMIT;