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controller.php
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controller.php
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<?php
/**
* Controller
* @package Simple Lightbox
* @author Archetyped
*/
class SLB_Lightbox extends SLB_Base {
/*-** Properties **-*/
protected $model = true;
/**
* Fields
* @var SLB_Fields
*/
public $fields = null;
/**
* Themes collection
* @var SLB_Themes
*/
public $themes = null;
/**
* Content types
* @var SLB_Content_Handlers
*/
public $handlers = null;
/**
* Template tags
* @var SLB_Template_Tags
*/
public $template_tags = null;
/**
* Media item template.
*
* @var array {
* Media item properties.
*
* @type int $id WP post ID. Default null.
* @type string $type Item type. Default null.
* @type string $source Source URI.
* @type bool $internal Internal resource. Default false.
* @type string $title Item title.
* @type string $caption Item caption.
* @type string $description Item description.
* @type array $media {
* Media properties (indexed by size name).
* Original size = 'full'.
*
* @type string $file File URI.
* @type int $width File width in pixels.
* @type int $height File height in pixels.
* }
* @type array $meta {
* Item metadata.
* }
* }
*/
private $media_item_template = [
'id' => null,
'type' => null,
'internal' => false,
'source' => '',
];
/**
* Processed media items for output to client.
*
* @var object[string] {
* Media item properties.
*
* @index string Unique ID (system-generated).
*
* @see $media_item_template.
* }
*/
private $media_items = [];
/**
* Collection of unprocessed media items.
*
* @var array {
* @type object[string] $props {
* Media item properties.
*
* @index string Unique ID (system-generated).
*
* @see $media_item_template
* }
* @type string[string] $uri {
* Cached URIs.
*
* @index string URI.
*
* @type string Item ID (points to item in `props` array)
* }
* }
*/
private $media_items_raw = [
'props' => [],
'uri' => [],
];
/**
* Manage excluded content
* @var object
*/
private $exclude = null;
private $groups = array(
'auto' => 0,
'manual' => array(),
);
/**
* Validated URIs
* Caches validation of parsed URIs
* > Key: URI
* > Value: (bool) TRUE if valid
* @var array
*/
private $validated_uris = array();
/* Widget properties */
/**
* Used to track if widget is currently being processed or not
* Set to Widget ID currently being processed
* @var bool|string
*/
private $widget_processing = false;
/**
* Parameters for widget being processed
* @param array
*/
private $widget_processing_params = null;
/**
* Manage nested widget processing
* Used to avoid premature widget output
* @var int
*/
private $widget_processing_level = 0;
/**
* Constructor
*/
public function __construct() {
parent::__construct();
// Init instances
$this->fields = new SLB_Fields();
$this->themes = new SLB_Themes( $this );
if ( ! is_admin() ) {
$this->template_tags = new SLB_Template_Tags( $this );
}
}
/* Init */
public function _init() {
parent::_init();
$this->util->do_action( 'init' );
}
/**
* Declare client files (scripts, styles)
* @uses parent::_client_files()
* @return void
*/
protected function _client_files( $files = null ) {
$js_path = 'client/js/';
$js_path .= ( SLB_DEV ) ? 'dev' : 'prod';
$files = array(
'scripts' => array(
'core' => array(
'file' => "$js_path/lib.core.js",
'deps' => 'jquery',
'enqueue' => false,
'in_footer' => true,
),
'view' => array(
'file' => "$js_path/lib.view.js",
'deps' => array( '[core]' ),
'context' => array( array( 'public', $this->m( 'is_request_valid' ) ) ),
'in_footer' => true,
),
),
'styles' => array(
'core' => array(
'file' => 'client/css/app.css',
'context' => array( 'public' ),
),
),
);
parent::_client_files( $files );
}
/**
* Register hooks
* @uses parent::_hooks()
*/
protected function _hooks() {
parent::_hooks();
/* Admin */
add_action( 'admin_menu', $this->m( 'admin_menus' ) );
/* Init */
add_action( 'wp', $this->m( '_hooks_init' ) );
}
/**
* Initialize hooks.
*
* @return void
*/
public function _hooks_init() {
if ( ! $this->is_enabled() ) {
return;
}
// Callback for hooks that need to have method added to end of stack.
$cb_hooks_add_last = $this->m( 'hooks_add_last' );
// Init lightbox
add_action( 'wp_footer', $this->m( 'client_footer' ) );
$this->util->add_action( 'footer_script', $this->m( 'client_init' ), 1 );
$this->util->add_filter( 'footer_script', $this->m( 'client_script_media' ), 2 );
// Link activation
add_filter( 'the_content', $cb_hooks_add_last );
add_filter( 'get_post_galleries', $cb_hooks_add_last );
$this->util->add_filter( 'post_process_links', $this->m( 'activate_groups' ), 11 );
$this->util->add_filter( 'validate_uri_regex', $this->m( 'validate_uri_regex_default' ), 1 );
// Content exclusion
$this->util->add_filter( 'pre_process_links', $this->m( 'exclude_content' ) );
$this->util->add_filter( 'pre_exclude_content', $this->m( 'exclude_shortcodes' ) );
$this->util->add_filter( 'post_process_links', $this->m( 'restore_excluded_content' ) );
// Grouping
if ( $this->options->get_bool( 'group_post' ) ) {
$this->util->add_filter( 'get_group_id', $this->m( 'post_group_id' ), 1 );
}
// Shortcode grouping
if ( $this->options->get_bool( 'group_gallery' ) ) {
add_filter( 'the_content', $this->m( 'group_shortcodes' ), 1 );
}
// Widgets
if ( $this->options->get_bool( 'enabled_widget' ) ) {
add_action( 'dynamic_sidebar_before', $this->m( 'widget_process_nested' ) );
add_action( 'dynamic_sidebar', $cb_hooks_add_last );
add_filter( 'dynamic_sidebar_params', $this->m( 'widget_process_inter' ), 1 );
add_action( 'dynamic_sidebar_after', $cb_hooks_add_last );
add_action( 'dynamic_sidebar_after', $cb_hooks_add_last );
} else {
add_action( 'dynamic_sidebar_before', $this->m( 'widget_block_start' ) );
add_action( 'dynamic_sidebar_after', $this->m( 'widget_block_finish' ) );
}
// Menus
if ( $this->options->get_bool( 'enabled_menu' ) ) {
add_filter( 'wp_nav_menu', $cb_hooks_add_last );
}
}
/**
* Adds hook(s) to end of filter/action stack.
*
* @param string $data Optional. Data being filtered.
* @return string Filtered content.
*/
public function hooks_add_last( $data = null ) {
global $wp_filter;
$tag = current_filter();
// Stop processing on invalid hook.
if ( empty( $tag ) || ! is_string( $tag ) ) {
return $data;
}
// Get lowest priority for filter.
$max_priority = max( array_keys( $wp_filter[ $tag ]->callbacks ) );
// Add priority offset
if ( $max_priority < PHP_INT_MAX ) {
$max_priority += min( 123, PHP_INT_MAX - $max_priority );
}
switch ( $tag ) {
case 'the_content':
add_filter( $tag, $this->m( 'activate_links' ), $max_priority );
break;
case 'get_post_galleries':
add_filter( $tag, $this->m( 'activate_galleries' ), $max_priority );
break;
case 'dynamic_sidebar':
add_action( $tag, $this->m( 'widget_process_start' ), $max_priority );
break;
case 'dynamic_sidebar_after':
add_action( $tag, $this->m( 'widget_process_finish' ), $max_priority );
add_action( $tag, $this->m( 'widget_process_nested_finish' ), $max_priority );
break;
case 'wp_nav_menu':
add_filter( $tag, $this->m( 'menu_process' ), $max_priority, 2 );
break;
}
// Remove init hook.
remove_filter( $tag, $this->m( __FUNCTION__ ) );
// Return content (for filters).
return $data;
}
/**
* Add post ID to link group ID
* @uses `SLB::get_group_id` filter
* @param array $group_segments Group ID segments
* @return array Modified group ID segments
*/
public function post_group_id( $group_segments ) {
if ( in_the_loop() ) {
// Prepend post ID to group ID
$post = get_post();
if ( $post ) {
array_unshift( $group_segments, $post->ID );
}
}
return $group_segments;
}
/**
* Init options
*/
protected function _options() {
// Setup options
$opts = array(
'groups' => array(
'activation' => array(
'title' => __( 'Activation', 'simple-lightbox' ),
'priority' => 10,
),
'grouping' => array(
'title' => __( 'Grouping', 'simple-lightbox' ),
'priority' => 20,
),
'ui' => array(
'title' => __( 'UI', 'simple-lightbox' ),
'priority' => 30,
),
'labels' => array(
'title' => __( 'Labels', 'simple-lightbox' ),
'priority' => 40,
),
),
'items' => array(
'enabled' => array(
'title' => __( 'Enable Lightbox Functionality', 'simple-lightbox' ),
'default' => true,
'group' => array( 'activation', 10 ),
),
'enabled_home' => array(
'title' => __( 'Enable on Home page', 'simple-lightbox' ),
'default' => true,
'group' => array( 'activation', 20 ),
),
'enabled_post' => array(
'title' => __( 'Enable on Single Posts', 'simple-lightbox' ),
'default' => true,
'group' => array( 'activation', 30 ),
),
'enabled_page' => array(
'title' => __( 'Enable on Pages', 'simple-lightbox' ),
'default' => true,
'group' => array( 'activation', 40 ),
),
'enabled_archive' => array(
'title' => __( 'Enable on Archive Pages (tags, categories, etc.)', 'simple-lightbox' ),
'default' => true,
'group' => array( 'activation', 50 ),
),
'enabled_widget' => array(
'title' => __( 'Enable for Widgets', 'simple-lightbox' ),
'default' => false,
'group' => array( 'activation', 60 ),
),
'enabled_menu' => array(
'title' => __( 'Enable for Menus', 'simple-lightbox' ),
'default' => false,
'group' => array( 'activation', 60 ),
),
'group_links' => array(
'title' => __( 'Group items (for displaying as a slideshow)', 'simple-lightbox' ),
'default' => true,
'group' => array( 'grouping', 10 ),
),
'group_post' => array(
'title' => __( 'Group items by Post (e.g. on pages with multiple posts)', 'simple-lightbox' ),
'default' => true,
'group' => array( 'grouping', 20 ),
),
'group_gallery' => array(
'title' => __( 'Group gallery items separately', 'simple-lightbox' ),
'default' => false,
'group' => array( 'grouping', 30 ),
),
'group_widget' => array(
'title' => __( 'Group widget items separately', 'simple-lightbox' ),
'default' => false,
'group' => array( 'grouping', 40 ),
),
'group_menu' => array(
'title' => __( 'Group menu items separately', 'simple-lightbox' ),
'default' => false,
'group' => array( 'grouping', 50 ),
),
'ui_autofit' => array(
'title' => __( 'Resize lightbox to fit in window', 'simple-lightbox' ),
'default' => true,
'group' => array( 'ui', 10 ),
'in_client' => true,
),
'ui_animate' => array(
'title' => __( 'Enable animations', 'simple-lightbox' ),
'default' => true,
'group' => array( 'ui', 20 ),
'in_client' => true,
),
'slideshow_autostart' => array(
'title' => __( 'Start Slideshow Automatically', 'simple-lightbox' ),
'default' => true,
'group' => array( 'ui', 30 ),
'in_client' => true,
),
'slideshow_duration' => array(
'title' => __( 'Slide Duration (Seconds)', 'simple-lightbox' ),
'default' => '6',
'attr' => array(
'size' => 3,
'maxlength' => 3,
),
'group' => array( 'ui', 40 ),
'in_client' => true,
),
'group_loop' => array(
'title' => __( 'Loop through items', 'simple-lightbox' ),
'default' => true,
'group' => array( 'ui', 50 ),
'in_client' => true,
),
'ui_overlay_opacity' => array(
'title' => __( 'Overlay Opacity (0 - 1)', 'simple-lightbox' ),
'default' => '0.8',
'attr' => array(
'size' => 3,
'maxlength' => 3,
),
'group' => array( 'ui', 60 ),
'in_client' => true,
),
'ui_title_default' => array(
'title' => __( 'Enable default title', 'simple-lightbox' ),
'default' => false,
'group' => array( 'ui', 70 ),
'in_client' => true,
),
'txt_loading' => array(
'title' => __( 'Loading indicator', 'simple-lightbox' ),
'default' => 'Loading',
'group' => array( 'labels', 20 ),
),
'txt_close' => array(
'title' => __( 'Close button', 'simple-lightbox' ),
'default' => 'Close',
'group' => array( 'labels', 10 ),
),
'txt_nav_next' => array(
'title' => __( 'Next Item button', 'simple-lightbox' ),
'default' => 'Next',
'group' => array( 'labels', 30 ),
),
'txt_nav_prev' => array(
'title' => __( 'Previous Item button', 'simple-lightbox' ),
'default' => 'Previous',
'group' => array( 'labels', 40 ),
),
'txt_slideshow_start' => array(
'title' => __( 'Start Slideshow button', 'simple-lightbox' ),
'default' => 'Start slideshow',
'group' => array( 'labels', 50 ),
),
'txt_slideshow_stop' => array(
'title' => __( 'Stop Slideshow button', 'simple-lightbox' ),
'default' => 'Stop slideshow',
'group' => array( 'labels', 60 ),
),
'txt_group_status' => array(
'title' => __( 'Slideshow status format', 'simple-lightbox' ),
'default' => 'Item %current% of %total%',
'group' => array( 'labels', 70 ),
),
),
'legacy' => array(
'header_activation' => null,
'header_enabled' => null,
'header_strings' => null,
'header_ui' => null,
'activate_attachments' => null,
'validate_links' => null,
'enabled_compat' => null,
'enabled_single' => array( 'enabled_post', 'enabled_page' ),
'enabled_caption' => null,
'enabled_desc' => null,
'ui_enabled_caption' => null,
'ui_caption_src' => null,
'ui_enabled_desc' => null,
'caption_src' => null,
'animate' => 'ui_animate',
'overlay_opacity' => 'ui_overlay_opacity',
'loop' => 'group_loop',
'autostart' => 'slideshow_autostart',
'duration' => 'slideshow_duration',
'txt_numDisplayPrefix' => null,
'txt_numDisplaySeparator' => null,
'txt_closeLink' => 'txt_link_close',
'txt_nextLink' => 'txt_link_next',
'txt_prevLink' => 'txt_link_prev',
'txt_startSlideshow' => 'txt_slideshow_start',
'txt_stopSlideshow' => 'txt_slideshow_stop',
'txt_loadingMsg' => 'txt_loading',
'txt_link_next' => 'txt_nav_next',
'txt_link_prev' => 'txt_nav_prev',
'txt_link_close' => 'txt_close',
),
);
parent::_set_options( $opts );
}
/* Methods */
/*-** Admin **-*/
/**
* Add admin menus
* @uses this->admin->add_theme_page
*/
function admin_menus() {
// Build options page
$lbls_opts = array(
'menu' => __( 'Lightbox', 'simple-lightbox' ),
'header' => __( 'Lightbox Settings', 'simple-lightbox' ),
'plugin_action' => __( 'Settings', 'simple-lightbox' ),
);
$pg_opts = $this->admin->add_theme_page( 'options', $lbls_opts )
->require_form()
->add_content( 'options', 'Options', $this->options );
// Add Support information
$support = $this->util->get_plugin_info( 'SupportURI' );
if ( ! empty( $support ) ) {
$pg_opts->add_content( 'support', __( 'Feedback & Support', 'simple-lightbox' ), $this->m( 'theme_page_callback_support' ), 'secondary' );
}
// Add Actions
$lbls_reset = array(
'title' => __( 'Reset', 'simple-lightbox' ),
'confirm' => __( 'Are you sure you want to reset Simple Lightbox\'s settings?', 'simple-lightbox' ),
'success' => __( 'Settings have been reset', 'simple-lightbox' ),
'failure' => __( 'Settings were not reset', 'simple-lightbox' ),
);
$this->admin->add_action( 'reset', $lbls_reset, $this->options );
}
/**
* Support information
*/
public function theme_page_callback_support() {
// Description
$desc = __( '<p>Simple Lightbox thrives on your feedback!</p><p>Click the button below to <strong>get help</strong>, <strong>request a feature</strong>, or <strong>provide some feedback</strong>!</p>', 'simple-lightbox' );
echo $desc;
// Link
$lnk_uri = $this->util->get_plugin_info( 'SupportURI' );
$lnk_txt = __( 'Get Support & Provide Feedback', 'simple-lightbox' );
echo $this->util->build_html_link(
$lnk_uri,
$lnk_txt,
array(
'target' => '_blank',
'class' => 'button',
)
);
}
/*-** Functionality **-*/
/**
* Checks whether lightbox is currently enabled/disabled
* @return bool TRUE if lightbox is currently enabled, FALSE otherwise
*/
function is_enabled() {
static $ret = null;
if ( is_null( $ret ) ) {
$ret = ( ! is_admin() && $this->options->get_bool( 'enabled' ) && ! is_feed() ) ? true : false;
if ( $ret ) {
$opt = '';
// Determine option to check
if ( is_home() || is_front_page() ) {
$opt = 'home';
} elseif ( is_singular() ) {
$opt = ( is_page() ) ? 'page' : 'post';
} elseif ( is_archive() || is_search() ) {
$opt = 'archive';
}
// Check sub-option
if ( ! empty( $opt ) ) {
// Prefix option name.
$opt = 'enabled_' . $opt;
if ( $this->options->has( $opt ) ) {
$ret = $this->options->get_bool( $opt );
}
}
}
}
// Filter return value
if ( ! is_admin() ) {
$ret = $this->util->apply_filters( 'is_enabled', $ret );
}
// Return value (force boolean)
return ! ! $ret;
}
/**
* Make sure content is valid for processing/activation
*
* @param string $content Content to validate
* @return bool TRUE if content is valid (FALSE otherwise)
*/
protected function is_content_valid( $content ) {
// Invalid hooks
if ( doing_filter( 'get_the_excerpt' ) ) {
return false;
}
// Non-string value
if ( ! is_string( $content ) ) {
return false;
}
// Empty string
$content = trim( $content );
if ( empty( $content ) ) {
return false;
}
// Content is valid
return $this->util->apply_filters( 'is_content_valid', true, $content );
}
/**
* Activates galleries extracted from post
* @see get_post_galleries()
* @param array $galleries A list of galleries in post
* @return A list of galleries with links activated
*/
function activate_galleries( $galleries ) {
// Validate
if ( empty( $galleries ) ) {
return $galleries;
}
// Check galleries for HTML output
$gallery = reset( $galleries );
if ( is_array( $gallery ) ) {
return $galleries;
}
// Activate galleries
$group = ( $this->options->get_bool( 'group_gallery' ) ) ? true : null;
foreach ( $galleries as $key => $val ) {
if ( ! is_null( $group ) ) {
$group = 'gallery_' . $key;
}
// Activate links in gallery
$gallery = $this->process_links( $val, $group );
// Save modified gallery
$galleries[ $key ] = $gallery;
}
return $galleries;
}
/**
* Scans post content for image links and activates them
*
* Lightbox will not be activated for feeds
* @param string $content Content to activate
* @param string (optonal) $group Group ID for content
* @return string Post content
*/
public function activate_links( $content, $group = null ) {
// Validate content
if ( ! $this->is_content_valid( $content ) ) {
return $content;
}
// Filter content before processing links
$content = $this->util->apply_filters( 'pre_process_links', $content );
// Process links
$content = $this->process_links( $content, $group );
// Filter content after processing links
$content = $this->util->apply_filters( 'post_process_links', $content );
return $content;
}
/**
* Process links in content
* @global obj $wpdb DB instance
* @global obj $post Current post
* @param string $content Text containing links
* @param string (optional) $group Group to add links to (Default: none)
* @return string Content with processed links
*/
protected function process_links( $content, $group = null ) {
// Extract links
$links = $this->get_links( $content, true );
// Do not process content without links
if ( empty( $links ) ) {
return $content;
}
// Process links
static $protocol = array( 'http://', 'https://' );
static $qv_att = 'attachment_id';
static $uri_origin = null;
if ( ! is_array( $uri_origin ) ) {
$uri_parts = array_fill_keys( array( 'scheme', 'host', 'path' ), '' );
$uri_origin = wp_parse_args( wp_parse_url( strtolower( home_url() ) ), $uri_parts );
}
static $uri_proto = null;
if ( empty( $uri_proto ) ) {
$uri_proto = (object) array(
'raw' => '',
'source' => '',
'parts' => '',
);
}
$uri_parts_required = array( 'host' => '' );
// Setup group properties
$g_props = (object) array(
'enabled' => $this->options->get_bool( 'group_links' ),
'attr' => 'group',
'base' => '',
'legacy_prefix' => 'lightbox[',
'legacy_suffix' => ']',
);
if ( $g_props->enabled ) {
$g_props->base = ( is_scalar( $group ) ) ? trim( strval( $group ) ) : '';
}
// Initialize content handlers
if ( ! ( $this->handlers instanceof SLB_Content_Handlers ) ) {
$this->handlers = new SLB_Content_Handlers( $this );
}
// Iterate through and activate supported links
foreach ( $links as $link ) {
// Init vars
$pid = 0;
$link_new = $link;
$uri = clone $uri_proto;
$type = false;
$props_extra = array();
$key = null;
$internal = false;
// Parse link attributes
$attrs = $this->util->parse_attribute_string( $link_new, array( 'href' => '' ) );
// Get URI
$uri->raw = $attrs['href'];
// Stop processing invalid links
if ( ! $this->validate_uri( $uri->raw )
|| $this->has_attribute( $attrs, 'active' ) // Previously-processed.
) {
continue;
}
// Normalize URI (make absolute)
$uri->source = WP_HTTP::make_absolute_url( $uri->raw, $uri_origin['scheme'] . '://' . $uri_origin['host'] );
// URI cached?
$key = $this->get_media_item_id( $uri->source );
// Internal URI? (e.g. attachments)
if ( ! $key ) {
$uri->parts = array_merge( $uri_parts_required, (array) wp_parse_url( $uri->source ) );
$internal = ( $uri->parts['host'] === $uri_origin['host'] ) ? true : false;
// Attachment?
if ( $internal && is_local_attachment( $uri->source ) ) {
$pid = url_to_postid( $uri->source );
$src = wp_get_attachment_url( $pid );
if ( ! ! $src ) {
$uri->source = $src;
$props_extra['id'] = $pid;
// Check cache for attachment source URI
$key = $this->get_media_item_id( $uri->source );
}
unset( $src );
}
}
// Determine content type
if ( ! $key ) {
// Get handler match
$hdl_result = $this->handlers->match( $uri->source );
if ( ! ! $hdl_result->handler ) {
$type = $hdl_result->handler->get_id();
$props_extra = $hdl_result->props;
// Updated source URI
if ( isset( $props_extra['uri'] ) ) {
$uri->source = $props_extra['uri'];
unset( $props_extra['uri'] );
}
}
// Cache valid item
if ( ! ! $type ) {
$key = $this->cache_media_item( $uri, $type, $internal, $props_extra );
}
}
// Stop processing invalid links
if ( ! $key ) {
// Cache invalid URI
$this->validated_uris[ $uri->source ] = false;
if ( $uri->raw !== $uri->source ) {
$this->validated_uris[ $uri->raw ] = false;
}
continue;
}
// Activate link
$this->set_attribute( $attrs, 'active' );
$this->set_attribute( $attrs, 'asset', $key );
// Mark internal links
if ( $internal ) {
$this->set_attribute( $attrs, 'internal', $pid );
}
// Set group (if enabled)
if ( $g_props->enabled ) {
$group = array();
// Get preset group attribute
$g = ( $this->has_attribute( $attrs, $g_props->attr ) ) ? $this->get_attribute( $attrs, $g_props->attr ) : '';
if ( ! empty( $g ) ) {
$group[] = $g;
} elseif ( ! empty( $g_props->base ) ) {
$group[] = $g_props->base;
}
/**
* Filter group ID components
*
* @see process_links()
*
* @param array $group Components used to build group ID
*/
$group = $this->util->apply_filters( 'get_group_id', $group );
// Default group
if ( empty( $group ) || ! is_array( $group ) ) {
$group = $this->get_prefix();
} else {
$group = implode( '_', $group );
}
// Set group attribute
$this->set_attribute( $attrs, $g_props->attr, $group );
unset( $g );
}
// Filter attributes
$attrs = $this->util->apply_filters( 'process_link_attributes', $attrs );
// Update link in content
$link_new = '<a ' . $this->util->build_attribute_string( $attrs ) . '>';
$content = str_replace( $link, $link_new, $content );
}
// Handle widget content
if ( ! ! $this->widget_processing && 'the_content' === current_filter() ) {
$content = $this->exclude_wrap( $content );
}
return $content;
}
/**
* Retrieve HTML links in content
* @param string $content Content to get links from
* @param bool (optional) $unique Remove duplicates from returned links (Default: FALSE)
* @return array Links in content
*/
function get_links( $content, $unique = false ) {
$rgx = "/\<a\b(?:(?!\shref=|\>).)*\shref=[^\>\<]++\>/i";
$links = [];
preg_match_all( $rgx, $content, $links );
$links = $links[0];
if ( $unique ) {
$links = array_unique( $links );
}
return $links;
}
/**
* Validate URI
* Matches specified URI against internal & external regex patterns
* URI is **invalid** if it matches a regex
*
* @param string $uri URI to validate
* @return bool TRUE if URI is valid
*/
protected function validate_uri( $uri ) {
static $patterns = null;
// Previously-validated URI
if ( isset( $this->validated_uris[ $uri ] ) ) {
return $this->validated_uris[ $uri ];
}
$valid = true;
// Boilerplate validation
if ( empty( $uri ) // Empty
|| 0 === strpos( $uri, '#' ) // Anchor
) {
$valid = false;
}
// Regex matching
if ( $valid ) {
// Get patterns
if ( is_null( $patterns ) ) {
$patterns = $this->util->apply_filters( 'validate_uri_regex', array() );
}
// Iterate through patterns until match found
foreach ( $patterns as $pattern ) {
if ( 1 === preg_match( $pattern, $uri ) ) {
$valid = false;
break;
}
}
}
// Cache
$this->validated_uris[ $uri ] = $valid;
return $valid;
}
/**
* Add URI validation regex pattern
* @param
*/
public function validate_uri_regex_default( $patterns ) {
$patterns[] = '@^https?://[^/]*(wikipedia|wikimedia)\.org/wiki/file:.*$@i';
return $patterns;
}
/* Client */
/**
* Checks if output should be loaded in current request
* @uses `is_enabled()`
* @uses `has_cached_media_items()`
* @return bool TRUE if output is being loaded into client
*/
public function is_request_valid() {
return ( $this->is_enabled() && $this->has_cached_media_items() ) ? true : false;
}
/**
* Sets options/settings to initialize lightbox functionality on page load
* @return void
*/
function client_init( $client_script ) {
// Get options
$options = $this->options->build_client_output();
// Load UI Strings
$labels = $this->build_labels();
if ( ! empty( $labels ) ) {
$options['ui_labels'] = $labels;