public async Task <IActionResult> AddTodoItemTag(string todoItemId, [FromBody] TodoItemTagAddRequest tag)
{
TodoItemTagDto res = null;
TodoItemTag model = null;
try
{
if (string.IsNullOrEmpty(tag.TagName))
{
model = await _dataProvider.AddTag(todoItemId, tag.TagId);
}
else
{
model = await _dataProvider.AddTag(todoItemId, tag.TagName);
}
}
catch (Exception ex)
{
Console.WriteLine(ex);
throw;
}
res = _mapper.Map <TodoItemTagDto>(model);
var resObj = new ObjectResult(res);
return(resObj);
}
private async Task UpdateTodoTags(TodoItem item, IEnumerable <string> tags)
{
var existingTags = await _context.Tags
.Where(t => tags.Any(s => s == t))
.ToDictionaryAsync(t => t.Name);
var existingMappings = item.TagsMapping?.ToDictionary(m => m.Tag.Name) ?? new Dictionary <string, TodoItemTag>();
item.TagsMapping = tags
.Select(t =>
{
TodoItemTag result;
if (existingMappings.TryGetValue(t, out result))
{
return(result);
}
result = new TodoItemTag
{
TodoItem = item
};
if (existingTags.TryGetValue(t, out Tag tag))
{
result.Tag = tag;
}
else
{
result.Tag = new Tag {
Name = t
};
}
return(result);
})
.ToList();
foreach (var mapping in existingMappings)
{
if (item.TagsMapping.All(x => x != mapping.Value))
{
_context.Remove(mapping.Value);
}
}
}
