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1<?php
2namespace Ably;
3
4class Channels {
5
6    private $ably;
7    private $channels = [];
8
9    /**
10     * Constructor
11     * @param AblyRest $ably Ably API instance
12     */
13    public function __construct( AblyRest $ably ) {
14        $this->ably = $ably;
15    }
16
17    /**
18     * Creates a new Channel object for the specified channel if none exists, or returns the existing channel
19     * Note that if you request the same channel with different parameters, all the instances
20     * of the channel will be updated.
21     * @param string $name Name of the channel
22     * @param array|null $options ChannelOptions for the channel
23     * @return \Ably\Channel
24     */
25    public function get( $name, $options = null ) {
26
27        if ( isset( $this->channels[$name] ) ) {
28            if ( !is_null( $options ) ) {
29                $this->channels[$name]->setOptions( $options );
30            }
31
32            return $this->channels[$name];
33        } else {
34            $this->channels[$name] = new Channel( $this->ably, $name, is_null( $options ) ? [] : $options );
35
36            return $this->channels[$name];
37        }
38    }
39
40    /**
41     * Releases the channel resource i.e. it’s deleted and can then be garbage collected
42     * @param string $name Name of the channel
43     */
44    public function release( $name ) {
45        if ( isset( $this->channels[$name] ) ) {
46            unset( $this->channels[$name] );
47        }
48    }
49}