implemented delete list item via CRUD

models/list_items.go

@@ -92,21 +92,3 @@ func GetListItemByID(listItemID int64) (listItem ListItem, err error) {
 
 	return
 }
-
-// DeleteListItemByID deletes a list item by its ID
-func DeleteListItemByID(itemID int64, doer *User) (err error) {
-
-	// Check if it exists
-	listitem, err := GetListItemByID(itemID)
-	if err != nil {
-		return
-	}
-
-	// Check if the user hat the right to delete that item
-	if listitem.CreatedByID != doer.ID {
-		return ErrNeedToBeItemOwner{ItemID: itemID, UserID: doer.ID}
-	}
-
-	_, err = x.ID(itemID).Delete(ListItem{})
-	return
-}

models/list_items_create_update.go

@@ -23,22 +23,13 @@ func (i *ListItem) Update(ID int64, doer *User) (err error) {
 
 // Helper function for creation or updating of new lists as both methods share most of their logic
 func createOrUpdateListItem(i *ListItem, doer *User, lID int64) (err error) {
+
 	// Check rights
-	user, _, err := GetUserByID(doer.ID)
+	user, err := listItemPreCheck(i, doer, lID)
 	if err != nil {
 		return
 	}
 
-	// Get the list to check if the user has the right to write to that list
-	list, err := GetListByID(lID) // TODO: Get the list with one query by item ID
-	if err != nil {
-		return
-	}
-
-	if !list.CanWrite(&user) {
-		return ErrNeedToBeListWriter{ListID: i.ListID, UserID: user.ID}
-	}
-
 	// Check if we have at least a text
 	if i.Text == "" {
 		return ErrListItemCannotBeEmpty{}
@@ -55,3 +46,25 @@ func createOrUpdateListItem(i *ListItem, doer *User, lID int64) (err error) {
 
 	return
 }
+
+// This helper function checks if the user has the right to edit a list item.
+// It is used in Create/Update/Delete.
+func listItemPreCheck(i *ListItem, doer *User, lID int64) (user User, err error) {
+	// Check rights
+	user, _, err = GetUserByID(doer.ID)
+	if err != nil {
+		return
+	}
+
+	// Get the list to check if the user has the right to write to that list
+	list, err := GetListByID(lID) // TODO: Get the list with one query by item ID
+	if err != nil {
+		return
+	}
+
+	if !list.CanWrite(&user) {
+		return user, ErrNeedToBeListWriter{ListID: i.ListID, UserID: user.ID}
+	}
+
+	return
+}

models/list_items_delete.go

@@ -0,0 +1,20 @@
+package models
+
+// Delete implements the delete method for listItem
+func (i *ListItem) Delete(id int64, doer *User) (err error) {
+
+	// Check if it exists
+	listitem, err := GetListItemByID(id)
+	if err != nil {
+		return
+	}
+
+	// Check if the user hat the right to delete that item
+	_, err = listItemPreCheck(i, doer, listitem.ListID)
+	if err != nil {
+		return
+	}
+
+	_, err = x.ID(id).Delete(ListItem{})
+	return
+}