fix label names update not reflected

packages/db/migrations/0120.do.entity_labels.sql

@@ -12,7 +12,7 @@ CREATE TABLE omnivore.entity_labels (
     unique(label_id, library_item_id, highlight_id)
 );
 
-GRANT SELECT, INSERT, DELETE ON omnivore.entity_labels TO omnivore_user;
+GRANT SELECT, INSERT, UPDATE, DELETE ON omnivore.entity_labels TO omnivore_user;
 
 CREATE OR REPLACE FUNCTION update_library_item_labels()
 RETURNS trigger AS $$
@@ -29,7 +29,7 @@ BEGIN
     END IF;
 
     IF current_library_item_id IS NOT NULL THEN
-        -- for labels of the ABORTlibrary_item
+        -- for labels of the library_item
         WITH labels_agg AS (
             SELECT array_agg(l.name) as names_agg
             FROM omnivore.labels l

packages/db/migrations/0121.do.alter_labels_table.sql

@@ -9,6 +9,25 @@ ALTER TABLE omnivore.labels ADD COLUMN updated_at timestamptz;
 CREATE TRIGGER update_labels_modtime BEFORE UPDATE ON omnivore.labels 
     FOR EACH ROW EXECUTE PROCEDURE update_updated_at_column();
 
+CREATE OR REPLACE FUNCTION update_entity_labels()
+RETURNS trigger AS $$
+BEGIN
+    -- update entity_labels table to trigger update on library_item table
+    UPDATE omnivore.entity_labels
+    SET label_id = NEW.id
+    WHERE label_id = OLD.id;
+
+    return NEW;
+END;
+$$ LANGUAGE plpgsql;
+
+-- triggers when label name is updated
+CREATE TRIGGER entity_labels_update
+AFTER UPDATE ON omnivore.labels
+FOR EACH ROW
+WHEN (OLD.name <> NEW.name)
+EXECUTE FUNCTION update_entity_labels();
+
 ALTER TABLE omnivore.abuse_report DROP COLUMN page_id;
 ALTER TABLE omnivore.abuse_report RENAME COLUMN elastic_page_id TO library_item_id;
 ALTER TABLE omnivore.content_display_report DROP COLUMN page_id;

packages/db/migrations/0121.undo.alter_labels_table.sql

@@ -9,6 +9,8 @@ ALTER TABLE omnivore.abuse_report ADD COLUMN page_id text;
 ALTER TABLE omnivore.content_display_report RENAME COLUMN library_item_id TO elastic_page_id;
 ALTER TABLE omnivore.content_display_report ADD COLUMN page_id text;
 
+DROP TRIGGER IF EXISTS entity_labels_update ON omnivore.labels;
+DROP FUNCTION IF EXISTS update_entity_labels();
 DROP TRIGGER update_labels_modtime ON omnivore.labels;
 
 ALTER TABLE omnivore.labels DROP COLUMN updated_at;