Move item in checklist

node.go

@@ -600,6 +600,50 @@ func ChecklistItemDelete(userID, checklistItemID int) (err error) { // {{{
 	)
 	return
 } // }}}
+func ChecklistItemMove(userID, checklistItemID, afterItemID int) (err error) { // {{{
+	_, err = service.Db.Conn.Exec(
+		`
+		WITH
+		"to" AS (
+			SELECT
+				i.checklist_group_id AS group_id,
+				i."order"
+			FROM checklist_item i
+			INNER JOIN checklist_group g ON i.checklist_group_id = g.id
+			INNER JOIN node n ON g.node_id = n.id
+			WHERE
+				n.user_id = $1 AND
+				i.id = $3
+		),
+
+		update_order AS (
+			UPDATE checklist_item
+			SET
+				"order" =
+				CASE
+					WHEN checklist_item."order" <= "to"."order" THEN checklist_item."order" - 1
+					WHEN checklist_item."order"  > "to"."order" THEN checklist_item."order" + 1
+				END
+			FROM "to"
+			WHERE
+				checklist_item.id != $2 AND
+				checklist_item.checklist_group_id = "to".group_id
+		)
+
+		UPDATE checklist_item
+		SET
+			checklist_group_id = "to".group_id,
+			"order" = "to"."order"
+		FROM "to"
+		WHERE
+			checklist_item.id = $2
+		`,
+		userID,
+		checklistItemID,
+		afterItemID,
+	)
+	return
+} // }}}
 
 func (node *Node) retrieveChecklist() (err error) { // {{{
 	var rows *sqlx.Rows