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src/Yavsc/ApiControllers/GCMController.cs

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+
+using System;
+using System.Linq;
+using System.Security.Claims;
+using Microsoft.AspNet.Authorization;
+using Microsoft.AspNet.Mvc;
+using Microsoft.Extensions.Logging;
+using Yavsc.Models;
+using Yavsc.Models.Identity;
+
+[Authorize, Route("~/api/gcm")]
+public class GCMController : Controller
+{
+    ILogger _logger;
+    ApplicationDbContext _context;
+
+    public GCMController(ApplicationDbContext context,
+     ILoggerFactory loggerFactory)
+    {
+        _logger = loggerFactory.CreateLogger<GCMController>();
+        _context = context;
+    }
+    /// <summary>
+    /// This is not a method supporting user creation.
+    /// It only registers Google Clood Messaging id.
+    /// </summary>
+    /// <param name="declaration"></param>
+    /// <returns></returns>
+    [Authorize, HttpPost("register")]
+    public IActionResult Register(
+        [FromBody] GoogleCloudMobileDeclaration declaration)
+    {
+        var uid = User.GetUserId();
+        
+        _logger.LogInformation($"Registering device with id:{declaration.DeviceId} for {uid}");
+        if (ModelState.IsValid)
+        {
+            var alreadyRegisteredDevice = _context.GCMDevices.FirstOrDefault(d => d.DeviceId == declaration.DeviceId);
+            var deviceAlreadyRegistered = (alreadyRegisteredDevice!=null);
+            if (deviceAlreadyRegistered)
+            {
+                 _logger.LogInformation($"deviceAlreadyRegistered");
+                // Override an exiting owner
+                alreadyRegisteredDevice.DeclarationDate = DateTime.Now;
+                alreadyRegisteredDevice.DeviceOwnerId = uid;
+                alreadyRegisteredDevice.GCMRegistrationId = declaration.GCMRegistrationId;
+                alreadyRegisteredDevice.Model = declaration.Model;
+                alreadyRegisteredDevice.Platform = declaration.Platform;
+                alreadyRegisteredDevice.Version = declaration.Version;
+                _context.Update(alreadyRegisteredDevice);
+                _context.SaveChanges(User.GetUserId());
+            }
+            else
+            {
+                 _logger.LogInformation($"new device");
+                declaration.DeclarationDate = DateTime.Now;
+                declaration.DeviceOwnerId = uid;
+                _context.GCMDevices.Add(declaration as GoogleCloudMobileDeclaration);
+                _context.SaveChanges(User.GetUserId());
+            }
+            var latestActivityUpdate = _context.Activities.Max(a=>a.DateModified);
+            return Json(new { 
+                IsAnUpdate = deviceAlreadyRegistered, 
+                UpdateActivities = (latestActivityUpdate != declaration.LatestActivityUpdate)
+                });
+        }
+        return new BadRequestObjectResult(ModelState);
+    }
+
+}