Added trigger for writing event in events table

Signed-off-by: parauliya <aman@infracloud.io>

deploy/db/tinkerbell-init.sql

@@ -75,8 +75,10 @@ CREATE TABLE IF NOT EXISTS workflow_data (
         , data JSONB
 );
 
+CREATE EXTENSION "uuid-ossp";
+
 CREATE TABLE IF NOT EXISTS events (
-	id UUID UNIQUE NOT NULL primary key
+	id UUID UNIQUE DEFAULT uuid_generate_v4()
 	, resource_id UUID NOT NULL
 	, resource_type int NOT NULL
 	, event_type int NOT NULL
@@ -99,4 +101,18 @@ $$ LANGUAGE plpgsql;
 
 CREATE TRIGGER events_channel
 AFTER INSERT ON events
-FOR EACH ROW EXECUTE PROCEDURE notify_event_changes()
+FOR EACH ROW EXECUTE PROCEDURE notify_event_changes();
+
+CREATE OR REPLACE FUNCTION insert_event()
+RETURNS trigger AS $trigger1$
+BEGIN
+  IF (TG_OP = 'INSERT') THEN
+        INSERT INTO events(resource_id, resource_type, event_type, created_at, data) VALUES (new.workflow_id, 2, 0, CURRENT_TIMESTAMP, new.action_list);
+        RETURN NEW;
+  END IF;
+END;
+$trigger1$ LANGUAGE plpgsql;
+
+CREATE TRIGGER workflow_changed
+AFTER INSERT ON workflow_state
+FOR EACH ROW EXECUTE PROCEDURE insert_event()