public static async Task<UserText> CreateTextAsync(
ApplicationDbContext dbContext,
string content)
{
var entity = new UserText
{
Content = content,
CreatedUtc = DateTime.UtcNow
};
MatchCollection matches = _emailRefRe.Matches(content);
if (matches.Count > 0)
{
entity.MentionsUser = new List<UserInfo>();
// We typically have few enough users that it's easiest just to get
// all of them.
IDictionary<string, UserInfo> allUsers = (await dbContext.UserInfos
.ToListAsync())
.ToDictionary(u => u.Email);
foreach (string match in matches.Cast<Match>().Select(m => m.Groups[1].Value).Distinct())
{
UserInfo mentionedUser;
if (allUsers.TryGetValue(match, out mentionedUser))
{
entity.MentionsUser.Add(mentionedUser);
}
}
}
return entity;
}
public static async Task NotifyMentionsAsync(
ApplicationDbContext dbContext,
string mentionedIn,
string mentioningUserId,
UserText text)
{
await dbContext.Entry(text).Collection(t => t.MentionsUser).LoadAsync();
if (text.MentionsUser != null && text.MentionsUser.Count > 0)
{
// TBD
}
}