reorg

src/Yavsc.Org/Services/BlogSpotService.cs

@@ -0,0 +1,184 @@
+using System.Diagnostics;
+using System.Security.Claims;
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.EntityFrameworkCore;
+using Yavsc;
+using Yavsc.Helpers;
+using Yavsc.Models;
+using Yavsc.Models.Blog;
+using Yavsc.Server.Exceptions;
+using Yavsc.Server.Helpers;
+using Yavsc.ViewModels.Auth;
+
+public class BlogSpotService
+{
+    private readonly ApplicationDbContext _context;
+    private readonly IAuthorizationService _authorizationService;
+
+    public BlogSpotService(ApplicationDbContext context,
+    IAuthorizationService authorizationService)
+    {
+        _authorizationService = authorizationService;
+        _context = context;
+    }
+
+    public BlogPost Create(string userId, BlogPost post)
+    {
+        _context.BlogSpot.Add(post);
+        _context.SaveChanges(userId);
+        return post;
+    }
+    public async Task<BlogPostEditViewModel> GetPostForEdition(ClaimsPrincipal user, long blogPostId)
+    {
+        var blog = await _context.BlogSpot.Include(x => x.Author).Include(x => x.ACL).SingleAsync(m => m.Id == blogPostId);
+         var auth = await _authorizationService.AuthorizeAsync(user, blog, new EditPermission());
+        if (!auth.Succeeded)
+        {
+            throw new AuthorizationFailureException(auth);
+        }  
+        var pub = await _context.blogSpotPublications.AnyAsync(x => x.BlogpostId == blog.Id);
+     
+        return new BlogPostEditViewModel(blog, pub);
+    }
+
+    public async Task<BlogPost> Details(ClaimsPrincipal user, long blogPostId)
+    {
+        BlogPost blog = await _context.BlogSpot
+       .Include(p => p.Author)
+       .Include(p => p.Tags)
+       .Include(p => p.Comments)
+       .Include(p => p.ACL)
+       .SingleAsync(m => m.Id == blogPostId);
+        if (blog == null)
+        {
+            return null;
+        }
+        var auth = await _authorizationService.AuthorizeAsync(user, blog, new ReadPermission());
+        if (!auth.Succeeded)
+        {
+            throw new AuthorizationFailureException(auth);
+        }
+        foreach (var c in blog.Comments)
+        {
+            c.Author = _context.Users.First(u => u.Id == c.AuthorId);
+        }
+        return blog;
+    }
+
+    public async Task Modify(ClaimsPrincipal user, BlogPostEditViewModel blogEdit)
+    {
+        var blog = _context.BlogSpot.SingleOrDefault(b => b.Id == blogEdit.Id);
+        Debug.Assert(blog != null);
+        var auth = await _authorizationService.AuthorizeAsync(user, blog, new EditPermission());
+        if (!auth.Succeeded)
+        {
+            throw new AuthorizationFailureException(auth);
+        }
+        blog.Article = blogEdit.Article;
+        blog.Title = blogEdit.Title;
+        blog.Photo = blogEdit.Photo;
+        blog.ACL = blogEdit.ACL;
+        // saves the change
+        _context.Update(blog);
+        var publication = await _context.blogSpotPublications.SingleOrDefaultAsync
+        (p => p.BlogpostId == blogEdit.Id);
+        if (publication != null)
+        {
+            if (!blogEdit.Publish)
+            {
+                _context.blogSpotPublications.Remove(publication);
+            }
+        }
+        else
+        {
+            if (blogEdit.Publish)
+            {
+                _context.blogSpotPublications.Add(
+                    new BlogSpotPublication
+                    {
+                        BlogpostId = blogEdit.Id
+                    }
+                );
+            }
+        }
+        _context.SaveChanges(user.GetUserId());
+    }
+
+    public async Task<IEnumerable<IBlogPost>> Index(ClaimsPrincipal user, string id, int skip = 0, int take = 25)
+    {
+        IEnumerable<IBlogPost> posts;
+
+        if (user.Identity.IsAuthenticated)
+        {
+            string viewerId = user.GetUserId();
+            long[] userCircles = await _context.Circle.Include(c => c.Members).
+                Where(c => c.Members.Any(m => m.MemberId == viewerId))
+                .Select(c => c.Id).ToArrayAsync();
+
+            posts = _context.BlogSpot
+                .Include(b => b.Author)
+                .Include(p => p.ACL)
+                .Include(p => p.Tags)
+                .Include(p => p.Comments)
+                .Where(p => p.ACL == null
+                || p.ACL.Count == 0
+                || (p.AuthorId == viewerId)
+                || (userCircles != null &&
+                    p.ACL.Any(a => userCircles.Contains(a.CircleId)))
+                );
+        }
+        else
+        {
+            posts = _context.blogSpotPublications
+            .Include(p => p.BlogPost)
+           .Include(b => b.BlogPost.Author)
+           .Include(p => p.BlogPost.ACL)
+           .Include(p => p.BlogPost.Tags)
+           .Include(p => p.BlogPost.Comments)
+           .Where(p => p.BlogPost.ACL == null
+           || p.BlogPost.ACL.Count == 0)
+           .Select(p => p.BlogPost).ToArray();
+        }
+
+        var data = posts.OrderByDescending(p => p.DateModified);
+        return data;
+    }
+
+    public async Task Delete(ClaimsPrincipal user, long id)
+    {
+        var uid = user.GetUserId();
+        BlogPost blog = _context.BlogSpot.Single(m => m.Id == id);
+
+        _context.BlogSpot.Remove(blog);
+        _context.SaveChanges(user.GetUserId());
+    }
+
+    public async Task<IEnumerable<BlogPost>> UserPosts(
+        string posterName,
+        string? readerId,
+        int pageLen = 10,
+        int pageNum = 0)
+    {
+        string? posterId = (await _context.Users.SingleOrDefaultAsync(u => u.UserName == posterName))?.Id ?? null;
+        if (posterId == null) return Array.Empty<BlogPost>();
+        return _context.UserPosts(posterId, readerId);
+    }
+
+    public object? GetTitle(string title)
+    {
+        return _context.BlogSpot.Include(
+                 b => b.Author
+             ).Where(x => x.Title == title).OrderByDescending(
+                 x => x.DateCreated
+             ).ToList();
+    }
+
+    public async Task<BlogPost?> GetBlogPostAsync(long value)
+    {
+        return await _context.BlogSpot
+        .Include(b => b.Author)
+        .Include(b => b.ACL)
+        .SingleOrDefaultAsync(x => x.Id == value);
+    }
+
+}

src/Yavsc.Org/Services/ChatHubConnexionManager.cs

@@ -0,0 +1,343 @@
+
+using System;
+using System.Collections.Concurrent;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using System.Windows.Input;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Localization;
+using Microsoft.Extensions.Logging;
+using Yavsc.Abstract.Chat;
+using Yavsc.Models;
+using Yavsc.ViewModels.Chat;
+
+namespace Yavsc.Services
+{
+
+    /// <summary>
+    /// Connexion Manager
+    /// </summary>
+    public class HubConnectionManager : IConnexionManager
+    {
+        private readonly ILogger _logger;
+
+        private Action<string, string>? _errorHandler;
+
+        /// <summary>
+        /// by cx id
+        /// </summary>
+        /// <typeparam name="string"></typeparam>
+        /// <typeparam name="string"></typeparam>
+        /// <returns></returns>
+
+        static readonly ConcurrentDictionary<string, string> ChatUserNames = new ConcurrentDictionary<string, string>();
+        /// <summary>
+        /// by user  name
+        /// </summary>
+        /// <returns></returns>
+        static readonly ConcurrentDictionary<string, List<string>> ChatCxIds = new ConcurrentDictionary<string, List<string>>();
+
+        /// <summary>
+        /// by user  name,
+        /// the list of its chat rooms
+        /// </summary>
+        /// <returns></returns>
+        static readonly ConcurrentDictionary<string, List<string>> ChatRoomPresence = new ConcurrentDictionary<string, List<string>>();
+        static readonly ConcurrentDictionary<string, bool> _isCop = new ConcurrentDictionary<string, bool>();
+
+        public static ConcurrentDictionary<string, ChatRoomInfo> Channels = new ConcurrentDictionary<string, ChatRoomInfo>();
+        readonly ApplicationDbContext _dbContext;
+        readonly IStringLocalizer _localizer;
+        public HubConnectionManager(IServiceScopeFactory ssf )
+        {
+            var scope = ssf.CreateScope();
+            _dbContext = scope.ServiceProvider.GetService<ApplicationDbContext>();
+            var loggerFactory = scope.ServiceProvider.GetService<ILoggerFactory>();
+            _logger = loggerFactory.CreateLogger<HubConnectionManager>();
+            var stringLocFactory = scope.ServiceProvider.GetService<IStringLocalizerFactory>();
+            _localizer = stringLocFactory.Create(typeof(HubConnectionManager));
+        }
+
+        public void SetUserName(string cxId, string userName)
+        {
+            string oldUname;
+            if (ChatUserNames.TryGetValue(cxId, out oldUname))
+            {
+                // this is a rename
+                if (oldUname == userName) return;
+                ChatCxIds[userName] = ChatCxIds[oldUname];
+                ChatCxIds[oldUname] = null;
+            }
+            else
+            {
+                // this is a connexion
+                ChatCxIds[userName] = new List<string>() { cxId };
+            }
+            ChatUserNames[cxId] = userName;
+        }
+        // Username must have been set before calling this method.
+        public void OnConnected(string cxId,  bool isCop)
+        {
+            var username = ChatUserNames[cxId];
+            if (!IsConnected(username)) 
+                ChatRoomPresence[username] = new List<string>();
+            _isCop[username] = isCop;
+        }
+
+        public bool IsConnected(string candidate)
+        {
+            return ChatRoomPresence.ContainsKey(candidate)
+                && ChatRoomPresence[candidate] != null;
+        }
+
+        public bool IsPresent(string roomName, string userName)
+        {
+            return ChatRoomPresence[userName].Contains(roomName);
+        }
+
+        public bool IsCop(string userName)
+        {
+            return _isCop[userName];
+        }
+
+        public void OnDisctonnected(string connectionId)
+        {
+            string uname;
+
+            if (!ChatUserNames.TryRemove(connectionId, out uname))
+                _logger.LogError($"Could not get removed user name for cx {connectionId}");
+            else
+            {
+                List<string> cxIds;
+                if (ChatCxIds.TryGetValue(uname, out cxIds))
+                {
+                    cxIds.Remove(connectionId);
+                    foreach (var room in ChatRoomPresence[uname])
+                    {
+                        Part(connectionId, room, "connexion aborted");
+                    }
+                }
+                else
+                    _logger.LogError($"Could not remove user cx {connectionId}");
+
+                ChatRoomPresence[uname] = null;
+            }
+        }
+
+        public bool Part(string cxId, string roomName, string reason)
+        {
+            ChatRoomInfo chanInfo;
+            if (Channels.TryGetValue(roomName, out chanInfo))
+            {
+                if (!chanInfo.Users.Contains(cxId))
+                {
+                    // TODO NotifyErrorToCaller(roomName, "you didn't join.");
+                    return false;
+                }
+                // FIXME only remove cx, not username,
+                // as long as he might be connected 
+                // from another device, to the same room
+                chanInfo.Users.Remove(cxId);
+                if (chanInfo.Users.Count == 0)
+                {
+                    ChatRoomInfo deadchanInfo;
+                    if (Channels.TryRemove(roomName, out deadchanInfo))
+                    {
+                        var room = _dbContext.ChatRoom.FirstOrDefault(r => r.Name == roomName);
+                        room.LatestJoinPart = DateTime.Now;
+                        _dbContext.SaveChanges();
+                    }
+                }
+                return true;
+            }
+            else
+            {
+                return false;
+                // TODO   NotifyErrorToCallerInRoom(roomName, $"user could not part: no such room");
+            }
+        }
+
+        public ChatRoomInfo Join(string roomName, string cxId)
+        {
+            var userName = ChatUserNames[cxId];
+
+            _logger.LogInformation($"Join: {userName}=>{roomName}");
+            ChatRoomInfo chanInfo;
+            // if channel already is open
+            if (Channels.ContainsKey(roomName))
+            {
+                if (Channels.TryGetValue(roomName, out chanInfo))
+                {
+                    if (IsPresent(roomName, userName))
+                    {
+                        // TODO implement some unique connection sharing protocol
+                        // between all terminals from a single user.
+                        return chanInfo;
+                    }
+                    else
+                    {
+                        if (IsCop(userName))
+                        {
+                            chanInfo.Ops.Add(cxId);
+                        }
+                        else{
+                            chanInfo.Users.Add(cxId);
+                        } 
+                        _logger.LogInformation($"existing room joint: {userName}=>{roomName}");
+                        if (!ChatRoomPresence[userName].Contains(roomName))
+                            ChatRoomPresence[userName].Add(roomName);
+                        return chanInfo;
+                    }
+                }
+                else
+                {
+                    string msg = "room seemd to be avaible ... but we could get no info on it.";
+                    _errorHandler(roomName, msg);
+                    return null;
+                }
+            }
+            // room was closed.
+            var room = _dbContext.ChatRoom.FirstOrDefault(r => r.Name == roomName);
+            chanInfo = new ChatRoomInfo();
+            
+
+            if (room != null)
+            {
+                chanInfo.Topic = room.Topic;
+                chanInfo.Name = room.Name;
+                chanInfo.Users.Add(cxId);
+            }
+            else
+            { // a first join, we create it.
+                chanInfo.Name = roomName;
+                chanInfo.Topic =  _localizer.GetString(ChatHubConstants.JustCreatedBy)+userName;
+                chanInfo.Ops.Add(cxId);
+            }
+
+            if (Channels.TryAdd(roomName, chanInfo))
+            {
+                ChatRoomPresence[userName].Add(roomName);
+                _logger.LogInformation("new room joint");
+                return (chanInfo);
+            }
+            else
+            {
+                string msg = "Chan create failed unexpectly...";
+                _errorHandler(roomName, msg);
+                return null;
+            }
+        }
+
+        public bool Op(string roomName, string userName)
+        {
+            throw new System.NotImplementedException();
+        }
+
+        public bool Deop(string roomName, string userName)
+        {
+            throw new System.NotImplementedException();
+        }
+
+        public bool Hop(string roomName, string userName)
+        {
+            throw new System.NotImplementedException();
+        }
+
+        public bool Dehop(string roomName, string userName)
+        {
+            throw new System.NotImplementedException();
+        }
+
+        public string GetUserName(string cxId)
+        {
+            return ChatUserNames[cxId];
+        }
+
+        public bool TryGetChanInfo(string room, out ChatRoomInfo chanInfo)
+        {
+            return Channels.TryGetValue(room, out chanInfo);
+        }
+
+        public IEnumerable<ChannelShortInfo> ListChannels(string pattern)
+        {
+            if (pattern != null)
+                return Channels.Where(c => c.Key.Contains(pattern))
+                .OrderByDescending(c => c.Value.Users.Count).Select(c => new ChannelShortInfo { RoomName = c.Key, Topic = c.Value.Topic }).Take(10);
+
+            return Channels
+             .OrderByDescending(c => c.Value.Users.Count).Select(c => new ChannelShortInfo { RoomName = c.Key, Topic = c.Value.Topic }).Take(10);
+        }
+
+        public IEnumerable<string> GetConnexionIds(string userName)
+        {
+            return ChatCxIds.ContainsKey(userName) ? ChatCxIds[userName] : null;
+        }
+
+        /// <summary>
+        /// set on error as string couple action
+        /// </summary>
+        /// <param name="errorHandler"></param>
+        public void SetErrorHandler(Action<string, string> errorHandler)
+        {
+            _errorHandler = errorHandler;
+        }
+
+        public bool Kick(string cxId, string userName, string roomName, string reason)
+        {
+            ChatRoomInfo chanInfo;
+            if (!Channels.ContainsKey(roomName))
+            {
+                _errorHandler(roomName, _localizer.GetString(ChatHubConstants.LabNoSuchChan).ToString());
+                return false;
+            }
+
+            if (!Channels.TryGetValue(roomName, out chanInfo)) 
+            {
+                _errorHandler(roomName, _localizer.GetString(ChatHubConstants.LabNoSuchChan).ToString());
+                return false;
+            }
+            
+            var kickerName = GetUserName(cxId);
+            if (!chanInfo.Ops.Contains(cxId))
+            if (!chanInfo.Hops.Contains(cxId))
+            {
+                _errorHandler(roomName, _localizer.GetString(ChatHubConstants.LabYouNotOp).ToString());
+                return false;
+            }
+
+            if (!IsPresent(roomName, userName))
+            {
+                _errorHandler(roomName, _localizer.GetString(ChatHubConstants.LabNoSuchUser).ToString());
+                return false;
+            }
+            var ucxs = GetConnexionIds(userName);
+            if (chanInfo.Hops.Contains(cxId))
+            if (chanInfo.Ops.Any(c => ucxs.Contains(c)))
+            {
+                _errorHandler(roomName, _localizer.GetString(ChatHubConstants.HopWontKickOp).ToString());
+                return false;
+            }
+            if (IsCop(userName))
+            {
+                _errorHandler(roomName, _localizer.GetString(ChatHubConstants.NoKickOnCop).ToString());
+                return false;
+            }
+
+            // all good, time to kick :-)
+            foreach (var ucx in ucxs) { 
+            if (chanInfo.Users.Contains(ucx)) 
+                chanInfo.Users.Remove(ucx);
+
+            else if (chanInfo.Ops.Contains(ucx)) 
+                chanInfo.Ops.Remove(ucx);
+
+            else if (chanInfo.Hops.Contains(ucx)) 
+                chanInfo.Hops.Remove(ucx);
+            }
+
+            return true;
+            
+        }
+    }
+}

src/Yavsc.Org/Services/DiskUsageTracker.cs

@@ -0,0 +1,101 @@
+using Microsoft.Extensions.Options;
+using Yavsc;
+using Yavsc.Models;
+using Yavsc.Services;
+
+
+public class DiskUsageTracker : IDiskUsageTracker
+{
+    public class DUTInfo
+    {
+        public DUTInfo()
+        {
+            Creation = DateTime.Now;
+        }
+        public long Usage { get; set; }
+        public long Quota { get; set; }
+        public readonly DateTime Creation;
+    }
+
+    readonly Dictionary<string, DUTInfo> DiskUsage;
+    readonly ApplicationDbContext context;
+    readonly int ulistLength;
+    public DiskUsageTracker(IOptions<SiteSettings> options, ApplicationDbContext context)
+    {
+        ulistLength = options.Value.DUUserListLen;
+        DiskUsage = new Dictionary<string, DUTInfo>();
+        this.context = context;
+    }
+
+    readonly static object userInfoLock = new object();
+
+    DUTInfo GetInfo(string username)
+    {
+        lock (userInfoLock)
+        {
+        if (!DiskUsage.ContainsKey(username))
+        {
+            var user = context.Users.SingleOrDefault(u => u.UserName == username);
+            if (user == null) throw new Exception($"Not an user : {username}");
+            DUTInfo usage = new DUTInfo
+            {
+                Usage = user.DiskUsage,
+                Quota = user.DiskQuota
+            };
+            DiskUsage.Add(username, usage);
+            if (DiskUsage.Count > ulistLength)
+            {
+                // remove the oldest
+                var oldestts = DateTime.Now;
+                DUTInfo oinfo = null;
+                string ouname = null;
+                foreach (var diskusage in DiskUsage)
+                {
+                    if (oldestts > usage.Creation)
+                    {
+                        oldestts = diskusage.Value.Creation;
+                        ouname = diskusage.Key;
+                        oinfo = diskusage.Value;
+                    }
+                }
+                var ouser = context.Users.SingleOrDefault(u => u.UserName == ouname);
+                ouser.DiskUsage = oinfo.Usage;
+                context.SaveChanges();
+                DiskUsage.Remove(ouname);
+            }
+            return usage;
+        }
+        return DiskUsage[username];
+        }
+    }
+    public bool GetSpace(string userName, long space)
+    {
+        var info = GetInfo(userName);
+        if (info.Quota < info.Usage + space) return false;
+        info.Usage += space;
+        #pragma warning disable CS4014
+        SaveUserUsage(userName,info.Usage);
+        #pragma warning restore CS4014
+        return true;
+    }
+
+    public void Release(string userName, long space)
+    {
+        var info = GetInfo(userName);
+        info.Usage -= space;
+        #pragma warning disable CS4014
+        SaveUserUsage(userName,info.Usage);
+        #pragma warning restore CS4014
+    }
+
+    async Task SaveUserUsage(string username, long usage)
+    {
+        await Task.Run(() =>
+        {
+            var ouser = context.Users.SingleOrDefault(u => u.UserName == username);
+            ouser.DiskUsage = usage;
+            context.SaveChanges();
+        });
+    }
+
+}

src/Yavsc.Org/Services/ExternalIdentityManager.cs

@@ -0,0 +1,32 @@
+using System.Security.Claims;
+using Microsoft.AspNetCore.Identity;
+using Microsoft.EntityFrameworkCore;
+using Yavsc.Interfaces;
+using Yavsc.Models;
+
+public class ExternalIdentityManager : IExternalIdentityManager
+{
+    private ApplicationDbContext _applicationDbContext;
+    private SignInManager<ApplicationUser> _signInManager;
+
+    public ExternalIdentityManager(ApplicationDbContext applicationDbContext, SignInManager<ApplicationUser> signInManager)
+    {
+        _applicationDbContext = applicationDbContext;
+        _signInManager = signInManager;
+    }
+    public ApplicationUser AutoProvisionUser(string provider, string providerUserId, List<Claim> claims)
+    {
+        throw new NotImplementedException();
+    }
+
+    public async Task<ApplicationUser?> FindByExternaleProviderAsync(string provider, string providerUserId)
+    {
+        
+        var user = await _applicationDbContext.UserLogins
+         .FirstOrDefaultAsync(
+             i => (i.LoginProvider == provider) && (i.ProviderKey == providerUserId)
+         );
+         if (user == null) return null;
+        return await _applicationDbContext.Users.FirstOrDefaultAsync(u=>u.Id == user.UserId);
+    }
+}

src/Yavsc.Org/Services/YavscMessageSender.cs

@@ -0,0 +1,173 @@
+using Microsoft.AspNetCore.SignalR;
+using Microsoft.Extensions.Logging;
+using Microsoft.Extensions.Options;
+using Newtonsoft.Json;
+using Yavsc.Interface;
+using Yavsc.Interfaces.Workflow;
+using Yavsc.Models;
+using Yavsc.Models.Google.Messaging;
+using Yavsc.Models.Haircut;
+using Yavsc.Models.Messaging;
+
+namespace Yavsc.Services
+{
+    public class YavscMessageSender : IYavscMessageSender
+    {
+        private readonly ILogger _logger;
+        readonly ITrueEmailSender _emailSender;
+        readonly SiteSettings siteSettings;
+        readonly ApplicationDbContext _dbContext;
+        readonly IConnexionManager _cxManager;
+        private readonly IHubContext<ChatHub> hubContext;
+
+        public YavscMessageSender(
+            ILoggerFactory loggerFactory,
+            IOptions<SiteSettings> sitesOptions,
+            ITrueEmailSender emailSender,
+            ApplicationDbContext dbContext,
+            IConnexionManager cxManager,
+            IHubContext<ChatHub> hubContext
+        )
+        {
+            _logger = loggerFactory.CreateLogger<MailSender>();
+            _emailSender = emailSender;
+            siteSettings = sitesOptions?.Value;
+            this.hubContext = hubContext;
+            _dbContext = dbContext;
+            _cxManager = cxManager;
+        }
+
+        public async Task<MessageWithPayloadResponse> NotifyEvent<Event>
+         (IEnumerable<string> userIds, Event ev)
+           where Event : IEvent
+        {
+
+            if (ev == null)
+                throw new Exception("Spécifier un évènement");
+
+            if (ev.Sender == null)
+                throw new Exception("Spécifier un expéditeur");
+
+            if (userIds == null)
+                throw new Exception("Notify e No user id");
+
+            MessageWithPayloadResponse response = new MessageWithPayloadResponse();
+
+            var raa = userIds.ToArray();
+            if (raa.Length < 1)
+                throw new Exception("No dest id");
+
+            try
+            {
+                List<MessageWithPayloadResponse.Result> results = new List<MessageWithPayloadResponse.Result>();
+                foreach (var userId in raa)
+                {
+                    _logger.LogDebug($"For performer id : {userId}");
+                    MessageWithPayloadResponse.Result result = new MessageWithPayloadResponse.Result
+                    {
+                        registration_id = userId
+                    };
+
+                    var user = _dbContext.Users.FirstOrDefault(u => u.Id == userId);
+                    if (user == null)
+                    {
+                        response.failure++;
+                        result.error = "no such user.";
+                        continue;
+                    }
+                    if (!user.EmailConfirmed)
+                    {
+                        response.failure++;
+                        result.error = "user has not confirmed his email address.";
+                        continue;
+                    }
+                    if (user.Email == null)
+                    {
+                        response.failure++;
+                        result.error = "user has no legacy email address.";
+                        continue;
+                    }
+
+                    var body = ev.CreateBody();
+
+
+                    _logger.LogDebug($"Sending to {user.UserName} <{user.Email}> : {body}");
+                    
+                        result.message_id = await _emailSender.SendEmailAsync(user.UserName, user.Email,
+                        $"{ev.Sender} (un client) vous demande un rendez-vous",
+                    body + Environment.NewLine);
+                        response.success++;
+                  
+                    var cxids = _cxManager.GetConnexionIds(user.UserName);
+                    if (cxids == null)
+                    {
+                        _logger.LogDebug($"no cx to {user.UserName} <{user.Email}> ");
+                    }
+                    else
+                    {
+                        _logger.LogDebug($"Sending signal to {string.Join(" ", cxids)}  : " + JsonConvert.SerializeObject(ev));
+
+                        foreach (var cxid in cxids)
+                        {
+                            // from usr asp.net Id : var hubClient = hubContext.Clients.User(userId);
+                            var hubClient = hubContext.Clients.Client(cxid);
+                            var data = new Dictionary<string, object>
+                            {
+                                ["event"] = JsonConvert.SerializeObject(ev)
+                            };
+                            await hubClient.SendAsync("push", ev.Topic, JsonConvert.SerializeObject(data));
+                        }
+
+                        result.message_id = MimeKit.Utils.MimeUtils.GenerateMessageId(
+                            siteSettings.Authority
+                        );
+
+                        response.success++;
+                    }
+                    results.Add(result);
+                }
+                response.results = results.ToArray();
+                return response;
+            }
+            catch (Exception ex)
+            {
+                _logger.LogError("Quelque chose s'est mal passé à l'envoi: " + ex.Message);
+                throw;
+            }
+        }
+
+        public async Task<MessageWithPayloadResponse> NotifyBookQueryAsync(IEnumerable<string> userIds, RdvQueryEvent ev)
+        {
+            return await NotifyEvent<RdvQueryEvent>(userIds, ev);
+        }
+
+        public async Task<MessageWithPayloadResponse> NotifyEstimateAsync(IEnumerable<string> userIds, EstimationEvent ev)
+        {
+            return await NotifyEvent<EstimationEvent>(userIds, ev);
+        }
+
+        public async Task<MessageWithPayloadResponse> NotifyHairCutQueryAsync(
+         IEnumerable<string> userIds, HairCutQueryEvent ev)
+        {
+            return await NotifyEvent<HairCutQueryEvent>(userIds, ev);
+        }
+
+        public async Task<MessageWithPayloadResponse> NotifyAsync(IEnumerable<string> userIds, IEvent yaev)
+        {
+            return await NotifyEvent<IEvent>(userIds, yaev);
+        }
+
+        /* SMS with Twilio:
+public Task SendSmsAsync(TwilioSettings twilioSettigns, string number, string message)
+{
+var Twilio = new TwilioRestClient(twilioSettigns.AccountSID, twilioSettigns.Token);
+var result = Twilio.SendMessage( twilioSettigns.SMSAccountFrom, number, message);
+// Status is one of Queued, Sending, Sent, Failed or null if the number is not valid
+Trace.TraceInformation(result.Status);
+// Twilio doesn't currently have an async API, so return success.
+
+return Task.FromResult(result.Status != "Failed");
+
+}  */
+    }
+}

src/Yavsc.Org/Services/YavscTemplateEngine.cs

@@ -0,0 +1,171 @@
+using System.Text;
+// // EMailer.cs
+// /*
+// paul  26/06/2018 12:18 20182018 6 26
+// */
+using Yavsc.Templates;
+using Microsoft.CodeAnalysis;
+using Microsoft.Extensions.Localization;
+using Microsoft.CodeAnalysis.CSharp;
+using Microsoft.CodeAnalysis.Emit;
+
+using Yavsc.Models;
+using Yavsc.Services;
+using System.Reflection;
+using Yavsc.Abstract.Templates;
+using Microsoft.AspNetCore.Identity;
+using RazorEngine.Configuration;
+using Yavsc.Interface;
+using Microsoft.Extensions.Logging;
+using System.Diagnostics;
+using RazorEngine.Compilation.ImpromptuInterface.Optimization;
+using RazorEngine.Compilation.ImpromptuInterface;
+
+namespace Yavsc.Lib
+{
+    public class YavscTemplateEngine
+    {
+        ISet<string> Namespaces = new System.Collections.Generic.HashSet<string> {
+            "System",
+            "Yavsc.Templates" ,
+            "Yavsc.Models",
+            "Yavsc.Models.Identity"};
+        
+        readonly IStringLocalizer<YavscTemplateEngine> stringLocalizer;
+        readonly ApplicationDbContext dbContext;
+
+        readonly ILogger logger;
+
+        public YavscTemplateEngine(ApplicationDbContext dbContext,
+                       IStringLocalizer<YavscTemplateEngine> localizer,
+                       ILoggerFactory loggerFactory)
+        {
+            stringLocalizer = localizer;
+            this.dbContext = dbContext;
+
+            logger = loggerFactory.CreateLogger<YavscTemplateEngine>();
+        }
+
+        public string RunUserTemplate(string templateCode)
+        {
+
+            string subtemp = stringLocalizer["MonthlySubjectTemplate"].Value;
+
+            logger.LogInformation($"Generating SendMonthlyEmail {templateCode}");
+
+
+            var templateInfo = dbContext.MailingTemplate.FirstOrDefault(t => t.Id == templateCode);
+            Debug.Assert (templateInfo != null);
+            var templatekey = RazorEngine.Engine.Razor.GetKey(templateInfo.Id);
+
+            logger.LogInformation($"Using code: {templateCode},  subject: {subtemp} ");
+            logger.LogInformation("And body:\n" + templateInfo.Body);
+
+
+            // Generate code for the template
+            using (var inMemoryCsharpCode = new MemoryStream())
+            {
+                using (var writter = new StreamWriter(inMemoryCsharpCode))
+                {
+                    RazorEngine.Engine.Razor.Run(templatekey, writter);
+                    inMemoryCsharpCode.Seek(0, SeekOrigin.Begin);
+
+                    SyntaxTree syntaxTree = CSharpSyntaxTree.ParseText(Encoding.Default.GetString(inMemoryCsharpCode.ToArray()));
+
+                    logger.LogInformation("CSharp parsed");
+                    List<MetadataReference> references = new List<MetadataReference>();
+
+                    foreach (var type in new Type[] {
+                        typeof(object),
+                        typeof(Enumerable),
+                        typeof(IdentityUser),
+                        typeof(ApplicationUser),
+                        typeof(Template),
+                        typeof(UserOrientedTemplate),
+                        typeof(System.Threading.Tasks.TaskExtensions)
+                    })
+                    {
+                        var location = type.Assembly.Location;
+                        if (!string.IsNullOrWhiteSpace(location))
+                        {
+                            references.Add(
+                                MetadataReference.CreateFromFile(location)
+                            );
+                            logger.LogInformation($"Assembly for {type.Name} found at {location}");
+                        }
+                        else logger.LogWarning($"Assembly Not found for {type.Name}");
+                    }
+
+                    logger.LogInformation("Compilation creation ...");
+
+                    var compilationOptions = new CSharpCompilationOptions(OutputKind.DynamicallyLinkedLibrary)
+                        .WithAllowUnsafe(true).WithOptimizationLevel(OptimizationLevel.Debug)
+                        .WithOutputKind(OutputKind.DynamicallyLinkedLibrary).WithPlatform(Platform.AnyCpu)
+                        .WithUsings("Yavsc.Templates")
+                        ;
+                    string assemblyName = "EMailSenderTemplate";
+                    CSharpCompilation compilation = CSharpCompilation.Create(
+                        assemblyName,
+                        syntaxTrees: new[] { syntaxTree },
+                        references: references,
+                        options: compilationOptions
+                        );
+
+                    using (var inMemoryAssembly = new MemoryStream())
+                    {
+                        logger.LogInformation("Emitting result ...");
+                        EmitResult result = compilation.Emit(inMemoryAssembly);
+                        foreach (Diagnostic diagnostic in result.Diagnostics.Where(diagnostic =>
+                                diagnostic.Severity < DiagnosticSeverity.Error && !diagnostic.IsWarningAsError))
+                        {
+                            logger.LogWarning("{0}: {1}", diagnostic.Id, diagnostic.GetMessage());
+                            logger.LogWarning("{0}: {1}", diagnostic.Id, diagnostic.Location.GetLineSpan());
+                        }
+                        if (!result.Success)
+                        {
+
+                            IEnumerable<Diagnostic> failures = result.Diagnostics.Where(diagnostic =>
+                                diagnostic.IsWarningAsError ||
+                                diagnostic.Severity == DiagnosticSeverity.Error);
+                            foreach (Diagnostic diagnostic in failures)
+                            {
+                                logger.LogCritical("{0}: {1}", diagnostic.Id, diagnostic.GetMessage());
+                                logger.LogCritical("{0}: {1}", diagnostic.Id, diagnostic.Location.GetLineSpan());
+                            }
+                            return null;
+                        }
+                        else
+                        {
+                               foreach (var user in dbContext.ApplicationUser.Where(
+                                u => u.AllowMonthlyEmail
+                            ))
+                            {
+
+                                var template = result.CallActLike<UserOrientedTemplate>(user);
+                                return template.GeneratedText;
+                            }
+                           
+/* result.CallActLike<>
+
+ inMemoryAssembly.Seek(0, SeekOrigin.Begin);
+                            Assembly assembly = Assembly.Load(inMemoryAssembly.ToArray());
+                   //          UserOrientedTemplate userOrientedTemplate = (UserOrientedTemplate)
+                   // FIXME               Activator.CreateInstance(Type.GetType(templateInfo.TemplateType));
+                            
+                            foreach (var user in dbContext.ApplicationUser.Where(
+                                u => u.AllowMonthlyEmail
+                            ))
+                            {
+                                logger.LogInformation("Generation for " + user.UserName);
+                                userOrientedTemplate.Init();
+                                userOrientedTemplate.User = user; */
+                             throw new NotImplementedException();
+                         
+                        }
+                    }
+                }
+            }
+            return null;
+        }
+    }
+}