custom-related-posts / custom-related-posts.php

custom-related-posts.php in Custom Related Posts 1.8.0, at custom-related-posts.php

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1	<?php
2	/*
3	Plugin Name: Custom Related Posts
4	Plugin URI: http://bootstrapped.ventures
5	Description: Manually define related posts for any custom post type
6	Version: 1.8.0
7	Author: Bootstrapped Ventures
8	Author URI: http://bootstrapped.ventures
9	Text Domain: custom-related-posts
10	License: GPLv3
11	*/
12	define( 'CRP_VERSION', '1.8.0' );
13
14	class CustomRelatedPosts {
15
16	private static $instance;
17	private static $instantiated_by_premium;
18	private static $addons = array();
19
20	/**
21	* Return instance of self
22	*/
23	public static function get( $instantiated_by_premium = false )
24	{
25	// Instantiate self only once
26	if( is_null( self::$instance ) ) {
27	self::$instantiated_by_premium = $instantiated_by_premium;
28	self::$instance = new self;
29	self::$instance->init();
30	}
31
32	return self::$instance;
33	}
34
35	/**
36	* Returns true if we are using the Premium version
37	*/
38	public static function is_premium_active()
39	{
40	return self::$instantiated_by_premium;
41	}
42
43	/**
44	* Add loaded addon to array of loaded addons
45	*/
46	public static function loaded_addon( $addon, $instance )
47	{
48	if( !array_key_exists( $addon, self::$addons ) ) {
49	self::$addons[$addon] = $instance;
50	}
51	}
52
53	/**
54	* Returns true if the specified addon has been loaded
55	*/
56	public static function is_addon_active( $addon )
57	{
58	return array_key_exists( $addon, self::$addons );
59	}
60
61	public static function addon( $addon )
62	{
63	if( isset( self::$addons[$addon] ) ) {
64	return self::$addons[$addon];
65	}
66
67	return false;
68	}
69
70	public static function setting( $setting )
71	{
72	return self::get()->helper( 'settings' )->get( $setting );
73	}
74
75	public $pluginName = 'custom-related-posts';
76	public $coreDir;
77	public $corePath;
78	public $coreUrl;
79	public $pluginFile;
80
81	protected $helper_dirs = array();
82	protected $helpers = array();
83
84	/**
85	* Initialize
86	*/
87	public function init()
88	{
89	// Update plugin version
90	update_option( $this->pluginName . '_version', CRP_VERSION );
91
92	// Set core directory, URL and main plugin file
93	$this->corePath = str_replace( '/custom-related-posts.php', '', plugin_basename( __FILE__ ) );
94	$this->coreDir = apply_filters( 'crp_core_dir', WP_PLUGIN_DIR . '/' . $this->corePath );
95	$this->coreUrl = apply_filters( 'crp_core_url', plugins_url() . '/' . $this->corePath );
96	$this->pluginFile = apply_filters( 'crp_plugin_file', __FILE__ );
97
98	// Load textdomain
99	if( !self::is_premium_active() ) {
100	add_action( 'init', array( $this, 'load_textdomain' ) );
101	}
102
103	// Add core helper directory
104	$this->add_helper_directory( $this->coreDir . '/helpers' );
105
106	// Migrate first if needed, then load settings.
107	$this->helper( 'migration' );
108	$this->helper( 'settings' );
109
110	// Load required helpers
111	$this->helper( 'activate' );
112	$this->helper( 'ajax' );
113	$this->helper( 'api' );
114	$this->helper( 'blocks' );
115	$this->helper( 'cache' );
116	$this->helper( 'css' );
117	$this->helper( 'giveaway' );
118	$this->helper( 'meta_box' );
119	$this->helper( 'output' );
120	$this->helper( 'overview_page' );
121	$this->helper( 'plugin_action_link' );
122	$this->helper( 'relations' );
123	$this->helper( 'shortcode' );
124	$this->helper( 'support_tab' );
125
126	// Include required helpers but don't instantiate
127	$this->include_helper( 'widget' );
128	$this->include_helper( 'addons/addon' );
129	$this->include_helper( 'addons/premium_addon' );
130
131	// Load core addons
132	$this->helper( 'addon_loader' )->load_addons( $this->coreDir . '/addons' );
133
134	// Load default assets
135	$this->helper( 'assets' );
136	}
137
138	public function load_textdomain()
139	{
140	load_plugin_textdomain( 'custom-related-posts', false, $this->corePath . '/lang/' );
141	}
142
143	/**
144	* Access a helper. Will instantiate if helper hasn't been loaded before.
145	*/
146	public function helper( $helper )
147	{
148	// Lazy instantiate helper
149	if( !isset( $this->helpers[$helper] ) ) {
150	$this->include_helper( $helper );
151
152	// Get class name from filename
153	$class_name = 'CRP';
154
155	$dirs = explode( '/', $helper );
156	$file = end( $dirs );
157	$name_parts = explode( '_', $file );
158	foreach( $name_parts as $name_part ) {
159	$class_name .= '_' . ucfirst( $name_part );
160	}
161
162	// Instantiate class if exists
163	if( class_exists( $class_name ) ) {
164	$this->helpers[$helper] = new $class_name();
165	}
166	}
167
168	// Return helper instance
169	return $this->helpers[$helper];
170	}
171
172	/**
173	* Include a helper. Looks through all helper directories that have been added.
174	*/
175	public function include_helper( $helper )
176	{
177	foreach( $this->helper_dirs as $dir )
178	{
179	$file = $dir . '/'.$helper.'.php';
180
181	if( file_exists( $file ) ) {
182	require_once( $file );
183	}
184	}
185	}
186
187	/**
188	* Add a directory to look for helpers.
189	*/
190	public function add_helper_directory( $dir )
191	{
192	if( is_dir( $dir ) ) {
193	$this->helper_dirs[] = $dir;
194	}
195	}
196
197	/*
198	* Quick access functions
199	*/
200	public function relation_data( $post )
201	{
202	return $this->helper( 'relations' )->get_data( $post );
203	}
204
205	public function relations_from( $post_id )
206	{
207	return $this->helper( 'relations' )->get_from( $post_id );
208	}
209
210	public function relations_to( $post_id )
211	{
212	return $this->helper( 'relations' )->get_to( $post_id );
213	}
214	}
215
216	// Premium version is responsible for instantiating if available
217	if( !class_exists( 'CustomRelatedPostsPremium' ) ) {
218	CustomRelatedPosts::get();
219	}