WEBVTT 00:02.060 --> 00:09.830 So last time we came up with a way to share some information with every single template and every single 00:09.830 --> 00:14.720 layout using magic variables like this user variable. 00:14.810 --> 00:18.260 But I don't want to share my name with everyone. 00:18.260 --> 00:27.260 Instead, I want to share the currently authenticated user either the model, the loaded user model, 00:27.260 --> 00:35.210 if someone is signed in, or if no one is signed in, then this should be the value of null. 00:35.990 --> 00:42.800 So let's jump to our Auf service, which only currently has this attempt method. 00:43.100 --> 00:45.230 Let's add something more. 00:45.620 --> 00:48.920 Let me add a static method. 00:51.200 --> 00:59.390 Called user and it would return either the user model or null. 01:00.600 --> 01:02.070 Now also. 01:04.350 --> 01:04.710 Okay. 01:04.710 --> 01:07.290 So how this can work. 01:07.950 --> 01:11.250 We should get the user ID from the session. 01:11.250 --> 01:19.710 So remember that we are storing the user ID in the session if user signs in and if the session is not 01:19.710 --> 01:20.820 expired. 01:22.260 --> 01:23.910 So we should have the user id. 01:24.630 --> 01:34.320 This means that we should be able to return the user model if this is not null. 01:34.530 --> 01:45.480 So if the user id is not null, we can use the user model find method to find the user by id. 01:45.690 --> 01:48.600 That's one of the built in model methods. 01:48.840 --> 01:51.360 Otherwise we return null. 01:51.720 --> 01:54.210 It is this simple. 01:54.240 --> 02:01.600 Now we're going to optimize that during this video because currently if you'd like to get the currently 02:01.600 --> 02:07.120 authenticated user, it's gonna make a database query every single time. 02:07.120 --> 02:12.640 And it's not necessary, at least not during one single request. 02:13.390 --> 02:16.240 So let's jump back to the front controller. 02:16.390 --> 02:25.300 And now instead of the name, I can use the auth class static method user, which I hope should give 02:25.300 --> 02:28.210 me the currently authenticated user. 02:28.240 --> 02:31.330 I'm going I'm using it right here. 02:33.490 --> 02:43.690 So let me jump to my blog and well, nothing terrible has happened, but I'm still not sure what we 02:43.690 --> 02:46.330 have inside this user variable. 02:48.430 --> 02:50.020 Maybe let's jump right here. 02:50.020 --> 03:02.420 And let me try to echo the logout link using my email I'm just going to try and echo the user email. 03:02.420 --> 03:09.470 Every user needs to have an email, so it can't be null if this is the user object. 03:11.600 --> 03:12.440 There it is. 03:12.440 --> 03:15.140 So it works perfectly. 03:15.920 --> 03:18.290 Now we need to optimize it. 03:19.280 --> 03:19.910 Okay. 03:19.910 --> 03:23.990 So we have the user ID in the session. 03:23.990 --> 03:34.700 And for the duration of the request we can keep the user model in a variable in a static field maybe. 03:37.250 --> 03:38.630 Let's define it then. 03:38.630 --> 03:44.360 Let's make it protected static user. 03:44.750 --> 03:47.060 By default it is null. 03:47.600 --> 03:51.110 And now let's modify this user method. 03:51.110 --> 03:58.190 So first if the user is null. 04:00.360 --> 04:07.710 Only then we're gonna try to, you know, get this logic of fetching the user. 04:07.710 --> 04:11.250 So we get the user ID first from the session. 04:14.940 --> 04:22.680 And then we store the result using static user without the return keyword here. 04:24.750 --> 04:32.310 And only then we always return the value of this user variable which would be null. 04:32.340 --> 04:36.930 Or it will contain the user model if that works. 04:36.930 --> 04:39.300 So I'm refreshing that. 04:39.300 --> 04:45.810 And it seems that everything still works and it still works everywhere. 04:47.010 --> 04:55.620 So this means that we should also add a sign in link if I am not signed in at the very moment, but 04:55.620 --> 05:02.200 to be able to do that, first we should work on logging out functionality and we're going to do this 05:02.200 --> 05:03.130 next. 05:03.610 --> 05:12.220 So one last thing to fix with this code is that the sessions they automatically expire after some time. 05:12.220 --> 05:14.140 That's normal in PHP. 05:14.170 --> 05:21.880 You've got a session timeout, and after some time of inactivity of the user, his session will expire 05:21.880 --> 05:28.240 and we just try to get the user ID from the session always. 05:28.240 --> 05:35.230 And if the key is not inside the super global, we're going to get this error, which also might happen 05:35.230 --> 05:37.120 if you are just not authenticated. 05:37.150 --> 05:41.830 That's why we need to make sure we add a null coalescing operator here. 05:41.830 --> 05:49.210 So if this key is not defined we just provide an alternative which is null. 05:49.210 --> 05:52.000 And then this fixes this problem. 05:52.000 --> 05:57.250 If someone is not authenticated or if his session has already expired.