"Swift Collections and Control Flow" was retired on May 31, 2020.
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You have completed Designing Interfaces in PHP!
You have completed Designing Interfaces in PHP!
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We'll be using multiple interfaces as we extend our content types. This will allow us to create different groups of functionality that will be used throughout my application.
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Great job defining some
additional interfaces.
0:00
We'll be using those interfaces
as we extend our content types.
0:03
So far, the site only displays posts,
but we want to show pages as well.
0:07
Each of these content types will
have many things in common, but
0:13
they will also have their own features.
0:17
Let's get our site ready for
these different content types, and
0:19
expand the post features at the same time.
0:22
Let's start by creating a new class
in our source classes folder.
0:25
We'll name this Posts.php.
0:31
Our class Posts is going
to extends Collection.
0:36
>> We'll need to change
the constructor a little.
0:46
So let's add a new
constructor to this class.
0:49
We're going to accept the same
parameters as the parent so
0:52
we can call the parent constructor.
0:55
So let's go into the collection class,
and select this constructor.
0:57
Before the call to the parent constructor,
we need to set the entity or
1:06
type of content we'll be using.
1:11
This equals 'posts'.
1:13
And then we can call
the parent::_ _ construct.
1:19
And we'll parse the $repo,
the $id, and the $field.
1:25
Now let's change the constructor on
the parent to use this new entity.
1:30
We're going to add another
protective property for entity.
1:34
And then instead of posts, we're going
to change this to ($this->entity).
1:41
Let's change our instance calls to
make sure that this new class works.
1:53
Posts.
2:00
Posts.
2:03
And let's preview.
2:05
Great.
2:06
Everything still works as it did before.
2:09
We're ready to implement the new
trackable and shareable interfaces.
2:11
Let's go back to post.
2:16
Posts is going to implement,
2:19
TrackableInterface and ShareableInterface.
2:24
Now for the TrackableInterface.
2:31
Public function getAuthor.
2:35
To get the author name we're
going to use our repo again.
2:44
But this time we'll be searching in users,
2:48
$user = $this->repo->find('users,
2:53
and then $this->current()-> author).
2:59
This will find the user that matches
the author id of the current item.
3:05
Because the find method returns an array,
3:09
we need to set the user variable
to contain just the first item.
3:12
Now we're going to check
if (empty($user->name)).
3:17
Then we can return 'Unknown';.
3:25
If we get past that return,
we can return the user name.
3:29
Return $user->name;.
3:35
Now for the public function getDateTime.
3:40
We want to return a formatted string for
the date and time.
3:50
We can add the format as
an optional parameter so
3:54
that we could parse a specific
format to this method,
3:58
even though the TrackableInterface did
not define any required parameters.
4:01
Because this parameter is optional and
4:05
has a default value,
it is still compatible
4:11
with the TrackableInterface,
4:16
$format = 'D, d M Y H: i: s').
4:21
Now we're going to turn the current
date time into a date time object.
4:25
$date = new
DateTime($this->current()->dateTime);.
4:31
Then we can return the formatted string.
4:43
Return $date->format($format);
4:46
Now for the ShareableInterface.
4:54
We'll need to create three methods
public function shareTwitter().
4:57
To share on Twitter, we're going to return
the URL encoded title with a space.
5:10
Return urlencode($this->current()->title.
5:16
And then a space.
5:28
Then we're going to link
to the current page.
5:30
Http:/ /
5:36
$_SERVER [ 'HTTP_HOST'].
5:41
And then $_SERVER ['REQUEST_URI']
5:48
Next we have public function shareEmail.
6:01
To share by email, we're going to return a
string containing the subject and the body
6:10
return 'subject =',
6:17
urlencode($this->current()->title).
6:22
And then &body=
6:34
urlencode($this->shortDescription().
6:38
Also add two line breaks "\n\nRead
more at " and the link to our site.
6:50
And finally Facebook.
7:03
Public function shareFacebook().
7:05
For Facebook, we'll simply return
a link to the current page.
7:15
Let's preview our site again, just to
make sure that we don't have any errors.
7:22
Great, our interfaces
are implemented properly.
7:27
We're ready to start checking for
interfaces and
7:30
displaying the proper views.
7:32
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