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LaravelFCM\Message\Topics
===============

Class Topics

Create topic or a topic condition

* Class name: Topics
* Namespace: LaravelFCM\Message

Methods
-------

### topic

\LaravelFCM\Message\Topics LaravelFCM\Message\Topics::topic(string $first)

Add a topic, this method should be called before any conditional topic

* Visibility: **public**

#### Arguments
* $first **string** - &lt;p&gt;topicName&lt;/p&gt;

### orTopic

\LaravelFCM\Message\Topics LaravelFCM\Message\Topics::orTopic(string|\Closure $first)

Add a or condition to the precedent topic set

Parenthesis is a closure

Equivalent of this: **'TopicA' in topic' || 'TopicB' in topics**

```
         $topic = new Topics();
         $topic->topic('TopicA')
               ->orTopic('TopicB');
```

Equivalent of this: **'TopicA' in topics && ('TopicB' in topics || 'TopicC' in topics)**

```
         $topic = new Topics();
         $topic->topic('TopicA')
               ->andTopic(function($condition) {
                     $condition->topic('TopicB')->orTopic('TopicC');
         });
```

> Note: Only two operators per expression are supported by fcm

* Visibility: **public**

#### Arguments
* $first **string|Closure** - &lt;p&gt;topicName or closure&lt;/p&gt;

### andTopic

\LaravelFCM\Message\Topics LaravelFCM\Message\Topics::andTopic(string|\Closure $first)

Add a and condition to the precedent topic set

Parenthesis is a closure

Equivalent of this: **'TopicA' in topic' && 'TopicB' in topics**

```
         $topic = new Topics();
         $topic->topic('TopicA')
               ->anTopic('TopicB');
```

Equivalent of this: **'TopicA' in topics || ('TopicB' in topics && 'TopicC' in topics)**

```
         $topic = new Topics();
         $topic->topic('TopicA')
               ->orTopic(function($condition) {
                     $condition->topic('TopicB')->AndTopic('TopicC');
         });
```

> Note: Only two operators per expression are supported by fcm

* Visibility: **public**

#### Arguments
* $first **string|Closure** - &lt;p&gt;topicName or closure&lt;/p&gt;

### build

array|string LaravelFCM\Message\Topics::build()

Transform to array

* Visibility: **public**

### hasOnlyOneTopic

boolean LaravelFCM\Message\Topics::hasOnlyOneTopic()

Check if only one topic was set

* Visibility: **public**

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