HTTP Triggers hookup (#1086)

* Initial suypport for invoking tiggers

* dupe method

* tighten server constraints

* runner tests not working yet

* basic route tests passing

* post rebase fixes

* add hybrid support for trigger invoke and tests

* consoloidate all hybrid evil into one place

* cleanup and make triggers unique by source

* fix oops with Agent

* linting

* review fixes

api/datastore/sql/sql.go

@@ -127,6 +127,8 @@ const (
 	triggerSelector   = `SELECT id,name,app_id,fn_id,type,source,annotations,created_at,updated_at FROM triggers`
 	triggerIDSelector = triggerSelector + ` WHERE id=?`
 
+	triggerIDSourceSelector = triggerSelector + ` WHERE app_id=? AND type=? AND source=?`
+
 	EnvDBPingMaxRetries = "FN_DS_DB_PING_MAX_RETRIES"
 )
 
@@ -1185,6 +1187,8 @@ func (ds *SQLStore) InsertTrigger(ctx context.Context, newTrigger *models.Trigge
 		if err := r.Scan(new(int)); err != nil {
 			if err == sql.ErrNoRows {
 				return models.ErrAppsNotFound
+			} else if err != nil {
+				return err
 			}
 		}
 
@@ -1194,12 +1198,23 @@ func (ds *SQLStore) InsertTrigger(ctx context.Context, newTrigger *models.Trigge
 		if err := r.Scan(&app_id); err != nil {
 			if err == sql.ErrNoRows {
 				return models.ErrFnsNotFound
+			} else if err != nil {
+				return err
 			}
 		}
 		if app_id != trigger.AppID {
 			return models.ErrTriggerFnIDNotSameApp
 		}
 
+		query = tx.Rebind(`SELECT 1 FROM triggers WHERE app_id=? AND type=? and source=?`)
+		r = tx.QueryRowContext(ctx, query, trigger.AppID, trigger.Type, trigger.Source)
+		err := r.Scan(new(int))
+		if err == nil {
+			return models.ErrTriggerSourceExists
+		} else if err != sql.ErrNoRows {
+			return err
+		}
+
 		query = tx.Rebind(`INSERT INTO triggers (
 			id,
 			name,
@@ -1318,8 +1333,7 @@ func (ds *SQLStore) GetTriggerByID(ctx context.Context, triggerID string) (*mode
 	err := row.StructScan(&trigger)
 	if err == sql.ErrNoRows {
 		return nil, models.ErrTriggerNotFound
-	}
-	if err != nil {
+	} else if err != nil {
 		return nil, err
 	}
 
@@ -1403,10 +1417,26 @@ func (ds *SQLStore) GetTriggers(ctx context.Context, filter *models.TriggerFilte
 		if err == sql.ErrNoRows {
 			return res, nil // no error for empty list
 		}
+		return nil, err
 	}
 	return res, nil
 }
 
+func (ds *SQLStore) GetTriggerBySource(ctx context.Context, appId string, triggerType, source string) (*models.Trigger, error) {
+	var trigger models.Trigger
+
+	query := ds.db.Rebind(triggerIDSourceSelector)
+	row := ds.db.QueryRowxContext(ctx, query, appId, triggerType, source)
+
+	err := row.StructScan(&trigger)
+	if err == sql.ErrNoRows {
+		return nil, models.ErrTriggerNotFound
+	} else if err != nil {
+		return nil, err
+	}
+	return &trigger, nil
+}
+
 // Close closes the database, releasing any open resources.
 func (ds *SQLStore) Close() error {
 	return ds.db.Close()