1
00:00:00,340 --> 00:00:05,693
In our inc folder, we're going to add

2
00:00:05,693 --> 00:00:11,557
a New File named functions_auth.php.

3
00:00:11,557 --> 00:00:17,187
We'll also need to add this
file to our bootstrap file.

4
00:00:17,187 --> 00:00:23,838
Duplicate that line and we'll change
it to auth and then we can close it.

5
00:00:23,838 --> 00:00:27,258
In our functions_auth file,

6
00:00:27,258 --> 00:00:31,605
we're ready to create a new function.

7
00:00:31,605 --> 00:00:34,367
We'll name this isAuthenticated.

8
00:00:40,175 --> 00:00:45,360
This function will need to read our
session to know if a user is logged in,

9
00:00:45,360 --> 00:00:49,525
for the session variable to
work inside of this function,

10
00:00:49,525 --> 00:00:51,744
we'll need a way to access it.

11
00:00:51,744 --> 00:00:56,759
One simple approach is to
call the global $session; For

12
00:00:56,759 --> 00:01:01,680
more options see the notes
associated with this video.

13
00:01:02,760 --> 00:01:08,962
We can then use session->get and look for

14
00:01:08,962 --> 00:01:14,651
our' auth_logged_in' variable.

15
00:01:14,651 --> 00:01:20,225
The value of this variable should
be true if the user is logged in.

16
00:01:20,225 --> 00:01:26,750
The get method allows us to specify
a default value as the second parameter.

17
00:01:26,750 --> 00:01:31,427
So we'll use for
our second parameter, false,

18
00:01:31,427 --> 00:01:35,428
then we can simply return those results.

19
00:01:37,571 --> 00:01:43,910
Either true, if the user is logged in,
or false if the user is not logged in.

20
00:01:44,950 --> 00:01:49,297
Now, let's use that isAuthenticated
function in our navigation to show

21
00:01:49,297 --> 00:01:50,498
the proper length.

22
00:01:52,758 --> 00:01:58,156
Under templates, We have a nav.php.

23
00:01:58,156 --> 00:02:03,740
We only want to add books if
the user is authenticated.

24
00:02:03,740 --> 00:02:06,008
So we can add a conditional
around that item.

25
00:02:11,044 --> 00:02:15,776
If isAuthenticated.

26
00:02:20,368 --> 00:02:25,012
And then

27
00:02:25,012 --> 00:02:30,990
endif;.

28
00:02:30,990 --> 00:02:37,745
Next, if the user is logged in, we don't
need to show the login and register links.

29
00:02:37,745 --> 00:02:41,460
Instead, we want to show log out.

30
00:02:41,460 --> 00:02:42,712
So let's add another conditional.

31
00:02:42,712 --> 00:02:49,708
If, isAuthenticated.

32
00:02:56,046 --> 00:02:58,050
We're going to add a new item.

33
00:02:58,050 --> 00:03:00,739
So let's copy the Login.

34
00:03:00,739 --> 00:03:04,211
And then we can add an else.

35
00:03:09,137 --> 00:03:13,846
And finally, endif;.

36
00:03:18,503 --> 00:03:23,828
We'll change the login to Logout.

37
00:03:23,828 --> 00:03:31,456
And we'll link directly
to procedures doLogout.

38
00:03:31,456 --> 00:03:37,028
Let's go back and refresh our browser
to see the changes in our navigation.

39
00:03:37,028 --> 00:03:41,160
We can see the add book
link which hasn't changed.

40
00:03:41,160 --> 00:03:46,200
But now instead of login and
register we see Logout.

41
00:03:46,200 --> 00:03:51,330
But before that Logout will work
we need to add that procedure.