public async Task <List <ChatVm> > FindChatsByStringQueryAsync(string searchQuery, long?navigationId = 0, bool?direction = true, long?userId = null)
{
using (MessengerDbContext context = contextFactory.Create())
{
ExpressionsHelper helper = new ExpressionsHelper();
var searchExpression = helper.GetChatExpression(searchQuery);
IQueryable <Chat> query = context.Chats
.Where(opt => !opt.Deleted)
.AsNoTracking();
if (userId == null)
{
query = query.Where(opt => (opt.Type == (short)ChatType.Public));
}
else
{
query = query.Where(opt => opt.ChatUsers
.Any(chatUser => chatUser.UserId == userId && !chatUser.Banned && !chatUser.Deleted) || (opt.Type == (short)ChatType.Public));
}
query = query.Where(searchExpression);
if (direction.GetValueOrDefault() == true)
{
query = query.OrderBy(opt => opt.Id)
.Where(opt => opt.Id > navigationId.GetValueOrDefault());
}
else
{
query = query.OrderByDescending(opt => opt.Id)
.Where(opt => opt.Id < navigationId.GetValueOrDefault());
}
List <Chat> chats = await query.ToListAsync().ConfigureAwait(false);
return(ChatConverter.GetChatsVm(chats));
}
}
public async Task <List <ChatVm> > FindChatsAsync(SearchChatVm template, int limit = 100, long navigationChatId = 0, long?nodeId = null)
{
using (MessengerDbContext context = contextFactory.Create())
{
IQueryable <Chat> query;
if (template != null)
{
ExpressionsHelper expressionsHelper = new ExpressionsHelper();
query = context.Chats
.AsNoTracking()
.OrderBy(chat => chat.Id)
.Where(expressionsHelper.GetChatExpression(template))
.Take(limit);
}
else
{
query = context.Chats
.AsNoTracking()
.OrderBy(chat => chat.Id)
.Take(limit);
}
if (nodeId != null)
{
query = query.Where(chat => chat.NodesId.Contains(nodeId.Value));
}
List <Chat> result = await query
.Where(chat => chat.Deleted == false && chat.Id > navigationChatId && (ChatType)chat.Type != ChatType.Private)
.ToListAsync()
.ConfigureAwait(false);
return(ChatConverter.GetChatsVm(result));
}
}
public async Task <List <ChatVm> > GetChatsNodeAsync(long userId = 0, byte limit = 100, long navigationId = 0)
{
try
{
using (MessengerDbContext context = contextFactory.Create())
{
List <Chat> chats;
if (userId == 0)
{
chats = await context.Chats
.AsNoTracking()
.OrderBy(chat => chat.Id)
.Where(chat => chat.Id > navigationId && ((ChatType)chat.Type) != ChatType.Private)
.Take(limit)
.ToListAsync()
.ConfigureAwait(false);
}
else
{
var query = from chat in context.Chats
join chatUser in context.ChatUsers on chat.Id equals chatUser.ChatId
where chatUser.UserId == userId && chatUser.Deleted == false
select chat;
chats = await query
.AsNoTracking()
.OrderBy(chat => chat.Id)
.Where(chat => chat.Id > navigationId)
.Take(limit)
.ToListAsync()
.ConfigureAwait(false);
}
return(ChatConverter.GetChatsVm(chats));
}
}
catch (Exception ex)
{
throw new GetConversationsException("Error when retrieving chat list.", ex);
}
}
public async Task <List <ChatVm> > GetChatsByIdAsync(IEnumerable <long> chatsId, long?userId)
{
using (MessengerDbContext context = contextFactory.Create())
{
var chatsCondition = PredicateBuilder.New <Chat>();
chatsCondition = chatsId.Aggregate(chatsCondition,
(current, value) => current.Or(opt => opt.Id == value && !opt.Deleted).Expand());
var query = context.Chats
.Where(chatsCondition);
if (userId != null)
{
query = query.Where(opt => opt.ChatUsers.Any(user => (user.UserId == userId && !user.Banned && !user.Deleted) || opt.Type == (short)ChatType.Public));
}
else
{
query = query.Where(opt => opt.Type == (short)ChatType.Public);
}
var chats = await query.ToListAsync().ConfigureAwait(false);
return(ChatConverter.GetChatsVm(chats));
}
}
