private async Task SetCategory(Image img, ImageFormVM imgForm)
{
if (string.IsNullOrWhiteSpace(imgForm.Category))
{
img.Category = null;
}
else
{
var category = PendingCategories.Find(c => c.Name.ToLower() == imgForm.Category.ToLower());
if (category != null)
{
img.Category = category;
return;
}
category = await _db.Categories.FirstOrDefaultAsync(c => c.Name.ToLower() == imgForm.Category.ToLower());
if (category == null)
{
category = new Category {
Name = imgForm.Category
};
PendingCategories.Add(category);
_db.Categories.Add(category);
}
img.Category = category;
}
}
private async Task SetTags(Image img, ImageFormVM imgForm)
{
if (string.IsNullOrWhiteSpace(imgForm.Tags))
{
if (img.ImageTags == null)
{
return;
}
else
{
_db.ImageTags.RemoveRange(img.ImageTags);
}
}
else
{
var currentTags = img.ImageTags == null ? new string[] { } : img.ImageTags.Select(it => it.Tag.Name.ToLower());
var formTags = imgForm.Tags.Split(",").Select(t => t.Trim().ToLower());
var tagsToAdd = new List <string>();
var tagsToRemove = new List <string>();
foreach (var tag in currentTags)
{
if (!formTags.Contains(tag))
{
tagsToRemove.Add(tag);
}
}
foreach (var tag in formTags)
{
if (!currentTags.Contains(tag))
{
tagsToAdd.Add(tag);
}
}
foreach (var tag in tagsToAdd)
{
var tagRec = PendingTags.Find(t => t.Name.ToLower() == tag);
if (tagRec == null)
{
tagRec = await _db.Tags.FirstOrDefaultAsync(t => t.Name == tag);
if (tagRec == null)
{
tagRec = new Tag {
Name = tag
};
PendingTags.Add(tagRec);
_db.Tags.Add(tagRec);
}
}
var imgTag = new ImageTag {
Image = img, Tag = tagRec
};
_db.ImageTags.Add(imgTag);
}
foreach (var tag in tagsToRemove)
{
var imgTag = await _db.ImageTags.Include(it => it.Tag).FirstOrDefaultAsync(it => it.ImageId == img.Id && it.Tag.Name == tag);
if (imgTag != null)
{
_db.ImageTags.Remove(imgTag);
}
}
}
}
