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liveblog.php
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<?php
/**
* Plugin Name: Liveblog
* Plugin URI: http://wordpress.org/extend/plugins/liveblog/
* Description: Blogging: at the speed of live.
* Version: 1.9
* Author: WordPress.com VIP, Big Bite Creative and contributors
* Author URI: https://github.com/Automattic/liveblog/graphs/contributors
* Text Domain: liveblog
*/
if ( ! class_exists( 'WPCOM_Liveblog' ) ) :
/**
* The main Liveblog class used to setup everything this plugin needs.
*
* Liveblog currently uses a custom comment-type to circumvent post cache
* issues frequently experienced by other live-blog implimentations. It comes
* with a simple and effective templating mechanism, complete with all of the
* CSS, JS, and AJAX needed to make this a turn-key installation.
*
* This class is a big container for a bunch of static methods, similar to a
* factory but without object inheritance or instantiation.
*/
final class WPCOM_Liveblog {
/** Constants *************************************************************/
const VERSION = '1.9';
const REWRITES_VERSION = 1;
const MIN_WP_VERSION = '4.4';
const MIN_WP_REST_API_VERSION = '4.4';
const KEY = 'liveblog';
const URL_ENDPOINT = 'liveblog';
const EDIT_CAP = 'publish_posts';
const NONCE_KEY = '_wpnonce'; // Using these strings since they're hard coded in the rest api. It'll still work fine for < 4.4
const NONCE_ACTION = 'wp_rest';
const REFRESH_INTERVAL = 10; // how often should we refresh
const DEBUG_REFRESH_INTERVAL = 2; // how often we refresh in development mode
const FOCUS_REFRESH_INTERVAL = 30; // how often we refresh in when window not in focus
const MAX_CONSECUTIVE_RETRIES = 100; // max number of failed tries before polling is disabled
const HUMAN_TIME_DIFF_UPDATE_INTERVAL = 60; // how often we change the entry human timestamps: "a minute ago"
const DELAY_THRESHOLD = 5; // how many failed tries after which we should increase the refresh interval
const DELAY_MULTIPLIER = 2; // by how much should we inscrease the refresh interval
const FADE_OUT_DURATION = 5; // how much time should take fading out the background of new entries
const RESPONSE_CACHE_MAX_AGE = DAY_IN_SECONDS; // `Cache-Control: max-age` value for cacheable JSON responses
const USE_REST_API = true; // Use the REST API if current version is at least MIN_WP_REST_API_VERSION. Allows for easy disabling/enabling
const DEFAULT_IMAGE_SIZE = 'full'; // The default image size to use when inserting media frm the media library.
/** Variables *************************************************************/
public static $post_id = null;
private static $entry_query = null;
private static $do_not_cache_response = false;
private static $custom_template_path = null;
public static $is_rest_api_call = false;
public static $auto_archive_days = null;
public static $auto_archive_expiry_key = 'liveblog_autoarchive_expiry_date';
public static $latest_timestamp = false;
public static $supported_post_types = array();
/** Load Methods **********************************************************/
/**
* @uses add_action() to hook methods into WordPress actions
* @uses add_filter() to hook methods into WordPress filters
*/
public static function load() {
load_plugin_textdomain( 'liveblog', false, dirname( plugin_basename( __FILE__ ) ) . '/languages/' );
if ( self::is_wp_too_old() ) {
self::add_old_wp_notice();
return;
}
self::includes();
self::add_actions();
self::add_filters();
self::add_admin_actions();
self::add_admin_filters();
self::register_embed_handlers();
WPCOM_Liveblog_Entry_Key_Events::load();
WPCOM_Liveblog_Entry_Key_Events_Widget::load();
WPCOM_Liveblog_Entry_Extend::load();
WPCOM_Liveblog_Lazyloader::load();
WPCOM_Liveblog_Socketio_Loader::load();
WPCOM_Liveblog_Entry_Embed_SDKs::load();
WPCOM_Liveblog_AMP::load();
if ( self::use_rest_api() ) {
WPCOM_Liveblog_Rest_Api::load();
}
// Activate the WP CRON Hooks.
WPCOM_Liveblog_Cron::load();
}
public static function add_custom_post_type_support( $query ) {
if ( ! self::is_entries_ajax_request() ) {
return;
}
$post_types = array_filter( get_post_types(), array( __CLASS__, 'liveblog_post_type' ) );
$query->set( 'post_type', $post_types );
}
public static function liveblog_post_type( $post_type ) {
return post_type_supports( $post_type, self::KEY );
}
private static function add_old_wp_notice() {
add_action( 'admin_notices', array( 'WPCOM_Liveblog', 'show_old_wp_notice' ) );
}
public static function show_old_wp_notice() {
global $wp_version;
$min_version = self::MIN_WP_VERSION;
echo self::get_template_part( 'old-wp-notice.php', compact( 'wp_version', 'min_version' ) ); // phpcs:ignore
}
/**
* Include the necessary files
*/
private static function includes() {
require( dirname( __FILE__ ) . '/classes/class-wpcom-liveblog-entry.php' );
require( dirname( __FILE__ ) . '/classes/class-wpcom-liveblog-entry-query.php' );
require( dirname( __FILE__ ) . '/classes/class-wpcom-liveblog-entry-key-events.php' );
require( dirname( __FILE__ ) . '/classes/class-wpcom-liveblog-entry-key-events-widget.php' );
require( dirname( __FILE__ ) . '/classes/class-wpcom-liveblog-entry-extend.php' );
require( dirname( __FILE__ ) . '/classes/class-wpcom-liveblog-entry-extend-feature.php' );
require( dirname( __FILE__ ) . '/classes/class-wpcom-liveblog-entry-extend-feature-hashtags.php' );
require( dirname( __FILE__ ) . '/classes/class-wpcom-liveblog-entry-extend-feature-commands.php' );
require( dirname( __FILE__ ) . '/classes/class-wpcom-liveblog-entry-extend-feature-emojis.php' );
require( dirname( __FILE__ ) . '/classes/class-wpcom-liveblog-entry-extend-feature-authors.php' );
require( dirname( __FILE__ ) . '/classes/class-wpcom-liveblog-lazyloader.php' );
require( dirname( __FILE__ ) . '/classes/class-wpcom-liveblog-socketio-loader.php' );
require( dirname( __FILE__ ) . '/classes/class-wpcom-liveblog-entry-embed.php' );
require( dirname( __FILE__ ) . '/classes/class-wpcom-liveblog-entry-embed-sdks.php' );
require( dirname( __FILE__ ) . '/classes/class-wpcom-liveblog-amp.php' );
require( dirname( __FILE__ ) . '/classes/class-wpcom-liveblog-amp-template.php' );
if ( self::use_rest_api() ) {
require( dirname( __FILE__ ) . '/classes/class-wpcom-liveblog-rest-api.php' );
}
// Manually include ms.php theme-side in multisite environments because
// we need its filesize and available space functions.
if ( ! is_admin() && is_multisite() ) {
require_once( ABSPATH . 'wp-admin/includes/ms.php' );
}
if ( defined( 'WP_CLI' ) && WP_CLI ) {
require( dirname( __FILE__ ) . '/classes/class-wpcom-liveblog-wp-cli.php' );
}
require( dirname( __FILE__ ) . '/classes/class-wpcom-liveblog-cron.php' );
}
/**
* Hook actions in that run on every page-load
*
* @uses add_action()
*/
private static function add_actions() {
add_action( 'init', array( __CLASS__, 'init' ) );
add_action( 'init', array( __CLASS__, 'add_rewrite_rules' ) );
add_action( 'permalink_structure_changed', array( __CLASS__, 'add_rewrite_rules' ) );
// flush the rewrite rules a lot later so that we don't interfere with other plugins using rewrite rules
add_action( 'init', array( __CLASS__, 'flush_rewrite_rules' ), 1000 );
add_action( 'wp_enqueue_scripts', array( __CLASS__, 'enqueue_scripts' ) );
add_action( 'admin_enqueue_scripts', array( __CLASS__, 'admin_enqueue_scripts' ) );
add_action( 'wp_ajax_set_liveblog_state_for_post', array( __CLASS__, 'admin_ajax_set_liveblog_state_for_post' ) );
add_action( 'pre_get_posts', array( __CLASS__, 'add_custom_post_type_support' ) );
add_action( 'wp_head', array( __CLASS__, 'print_liveblog_metadata' ) );
}
/**
* Hook filters in that run on every page-load
*
* @uses add_filter()
*/
private static function add_filters() {
add_filter( 'template_redirect', array( __CLASS__, 'handle_request' ), 9 );
add_filter( 'comment_class', array( __CLASS__, 'add_comment_class' ), 10, 3 );
add_filter( 'is_protected_meta', array( __CLASS__, 'protect_liveblog_meta_key' ), 10, 2 );
// Add In the Filter hooks to Strip any Restricted Shortcodes before a new post or updating a post.
// Called from the WPCOM_Liveblog_Entry Class.
add_filter( 'liveblog_before_insert_entry', array( 'WPCOM_Liveblog_Entry', 'handle_restricted_shortcodes' ), 10, 1 );
add_filter( 'liveblog_before_update_entry', array( 'WPCOM_Liveblog_Entry', 'handle_restricted_shortcodes' ), 10, 1 );
// We need to check the Liveblog autoarchive date on each time a new entry is added or updated to
// ensure we extend the date out correctly to the next archive point based on the configured offset.
add_filter( 'liveblog_before_insert_entry', array( __CLASS__, 'update_autoarchive_expiry' ), 10, 1 );
}
/**
* Hook actions in that run on every admin page-load
*
* @uses add_action()
* @uses is_admin()
*/
private static function add_admin_actions() {
// Bail if not in admin area
if ( ! is_admin() ) {
return;
}
add_action( 'add_meta_boxes', array( __CLASS__, 'add_meta_box' ) );
add_action( 'restrict_manage_posts', array( __CLASS__, 'add_post_filtering_dropdown_to_manage_posts' ) );
add_action( 'pre_get_posts', array( __CLASS__, 'handle_query_vars_for_post_filtering' ) );
}
/**
* Hook filters in that run on every admin page-load
*
* @uses add_filter()
* @uses is_admin()
*/
private static function add_admin_filters() {
// Bail if not in admin area
if ( ! is_admin() ) {
return;
}
add_filter( 'display_post_states', array( __CLASS__, 'add_display_post_state' ), 10, 2 );
add_filter( 'query_vars', array( __CLASS__, 'add_query_var_for_post_filtering' ) );
}
private static function register_embed_handlers() {
// register it to run later, because the regex is pretty general and we don't want it to prevent more specific handlers from running
wp_embed_register_handler( 'liveblog_image', '/\.(png|jpe?g|gif)(\?.*)?$/', array( 'WPCOM_Liveblog', 'image_embed_handler' ), 99 );
}
/** Public Methods ********************************************************/
/**
* Liveblog initialization functions.
*
* This is where Liveblog sets up any additional things it needs to run
* inside of WordPress. Where some plugins would register post types or
* taxonomies, we modify endpoints and add post type support for Liveblog.
*/
public static function init() {
/**
* Add liveblog support to the 'post' post type. This is done here so
* we can possibly introduce this to other post types later.
*/
$post_types = array( 'post' );
self::$supported_post_types = apply_filters( 'liveblog_modify_supported_post_types', $post_types );
foreach ( self::$supported_post_types as $post_type ) {
add_post_type_support( $post_type, self::KEY );
}
/**
* Apply a Filter to Setup our Auto Archive Days.
* NULL is classed as disabled.
*/
self::$auto_archive_days = apply_filters( 'liveblog_auto_archive_days', self::$auto_archive_days );
do_action( 'after_liveblog_init' );
}
public static function add_rewrite_rules() {
add_rewrite_endpoint( self::URL_ENDPOINT, EP_PERMALINK );
}
public static function flush_rewrite_rules() {
$rewrites_version = (int) get_option( 'liveblog_rewrites_version' );
if ( self::REWRITES_VERSION !== $rewrites_version ) {
flush_rewrite_rules();
update_option( 'liveblog_rewrites_version', self::REWRITES_VERSION );
}
}
/**
* Returns the ID of the Liveblog post.
*
* @throws Exception when called before post ID is set
* @return int Liveblog post ID
*/
public static function get_post_id() {
if ( is_null( self::$post_id ) ) {
throw new Exception( __( 'No Liveblog post ID is set yet', 'liveblog' ) );
}
return self::$post_id;
}
/**
* Returns the avatar for a user
*
* @param $user_id author ID
* @param $size size, in pixels (or named size)
* @return HTML for avatar
*/
public static function get_avatar( $user_id, $size ) {
return apply_filters( 'liveblog_author_avatar', get_avatar( $user_id, $size ), $user_id, $size );
}
/**
* Get current user
*/
public static function get_current_user() {
if ( ! self::is_liveblog_editable() ) {
return false;
}
$user = wp_get_current_user();
return array(
'id' => $user->ID,
'key' => strtolower( $user->user_nicename ),
'name' => $user->display_name,
'avatar' => self::get_avatar( $user->ID, 20 ),
);
}
/**
* This is where a majority of the magic happens.
*
* Hooked to template_redirect, this method tries to add anything it can to
* the current post output. If nothing needs to be added, we redirect back
* to the permalink.
*
* @return If request has been handled
*/
public static function handle_request() {
if ( ! self::is_viewing_liveblog_post() ) {
return;
}
self::$post_id = get_the_ID();
self::$custom_template_path = apply_filters( 'liveblog_template_path', self::$custom_template_path, self::$post_id );
if ( ! is_dir( self::$custom_template_path ) ) {
self::$custom_template_path = null;
} else {
// realpath is used here to ensure we have an absolute path which is necessary to avoid APC related bugs
self::$custom_template_path = untrailingslashit( realpath( self::$custom_template_path ) );
}
self::$entry_query = new WPCOM_Liveblog_Entry_Query( self::$post_id, self::KEY );
if ( self::is_initial_page_request() ) {
// we need to add the liveblog after the shortcodes are run, because we already
// process shortcodes in the comment contents and if we left any (like in the original content)
// we wouldn't like them to be processed
add_filter( 'the_content', array( __CLASS__, 'add_liveblog_to_content' ), 20 );
} else {
self::handle_ajax_request();
}
}
private static function handle_ajax_request() {
$endpoint_suffix = get_query_var( self::URL_ENDPOINT );
if ( ! $endpoint_suffix ) {
// we redirect, because if somebody accessed <permalink>/liveblog
// they probably did that in the URL bar, not via AJAX
wp_safe_redirect( get_permalink() );
exit();
}
wp_cache_delete( self::KEY . '_entries_asc_' . self::$post_id, 'liveblog' );
$suffix_to_method = array(
'\d+/\d+' => 'ajax_entries_between',
'crud' => 'ajax_crud_entry',
'entry' => 'ajax_single_entry',
'lazyload' => 'ajax_lazyload_entries',
'preview' => 'ajax_preview_entry',
);
$response_method = 'ajax_unknown';
foreach ( $suffix_to_method as $suffix_re => $method ) {
if ( preg_match( "%^$suffix_re/?%", $endpoint_suffix ) ) {
$response_method = $method;
break;
}
}
/**
* Fires just before the Liveblog's ajax request is handled by one of the methods
*
* @param string $response_method The name of the method used for handling the request.
*/
do_action( 'liveblog_ajax_request', $response_method );
self::$response_method();
}
/**
* Look for any new Liveblog entries, and return them via JSON
* Legacy endpoint for pre 4.4 installs
*/
public static function ajax_entries_between() {
$response_args = array();
// Look for entry boundaries
list( $start_timestamp, $end_timestamp ) = self::get_timestamps_from_query();
// Bail if there is no end timestamp
if ( empty( $end_timestamp ) ) {
self::send_user_error( __( 'A timestamp is missing. Correct URL: <permalink>/liveblog/<from>/</to>/', 'liveblog' ) );
}
// Get liveblog entries within the start and end boundaries
$result_for_json = self::get_entries_by_time( $start_timestamp, $end_timestamp );
self::json_return( $result_for_json );
}
/**
* Get Liveblog entries between a start and end time for a post
*
* @param int $start_timestamp The start time boundary
* @param int $end_timestamp The end time boundary
*
* @return An array of Liveblog entries, possibly empty.
*/
public static function get_entries_by_time( $start_timestamp, $end_timestamp ) {
// Set some defaults
$latest_timestamp = null;
$entries_for_json = array();
// Do not cache if it's too soon
if ( $end_timestamp > time() ) {
self::$do_not_cache_response = true;
}
if ( empty( self::$entry_query ) ) {
self::$entry_query = new WPCOM_Liveblog_Entry_Query( self::$post_id, self::KEY );
}
// Get liveblog entries within the start and end boundaries
$all_entries = self::$entry_query->get_all_entries_asc();
$entries = self::$entry_query->find_between_timestamps( $all_entries, $start_timestamp, $end_timestamp );
$pages = false;
$per_page = WPCOM_Liveblog_Lazyloader::get_number_of_entries();
if ( ! empty( $entries ) ) {
/**
* Loop through each liveblog entry, set the most recent timestamp, and
* put the JSON data for each entry into a neat little array.
*/
foreach ( $entries as $entry ) {
$latest_timestamp = max( $latest_timestamp, $entry->get_timestamp() );
$entries_for_json[] = $entry->for_json();
}
$pages = ceil( count( self::flatten_entries( $all_entries ) ) / $per_page );
}
// Create the result array
$result = array(
'entries' => $entries_for_json,
'latest_timestamp' => $latest_timestamp,
'refresh_interval' => self::get_refresh_interval(),
'pages' => $pages,
);
if ( ! empty( $entries_for_json ) ) {
do_action( 'liveblog_entry_request', $result );
} else {
do_action( 'liveblog_entry_request_empty' );
}
return $result;
}
/**
* Is a given post_id a liveblog enabled post?
*
* @global WP_Post $post
* @param int $post_id
* @return bool
*/
public static function is_liveblog_post( $post_id = null ) {
$state = self::get_liveblog_state( $post_id );
return (bool) $state;
}
/**
* Are we viewing a liveblog post?
*
* @uses is_single()
* @uses is_liveblog_post()
* @return bool
*/
public static function is_viewing_liveblog_post() {
return (bool) ( is_singular( self::$supported_post_types ) && self::is_liveblog_post() );
}
/**
* One of: 'enable', 'archive', false.
*/
public static function get_liveblog_state( $post_id = null ) {
if ( ! is_singular( self::$supported_post_types ) && ! is_admin() && ! self::$is_rest_api_call ) {
return false;
}
if ( empty( $post_id ) ) {
if ( ! empty( self::$post_id ) ) {
$post_id = self::$post_id;
} else {
global $post;
if ( ! $post ) {
return false;
}
$post_id = $post->ID;
}
}
$state = get_post_meta( $post_id, self::KEY, true );
// backwards compatibility with older values
if ( 1 === $state ) {
$state = 'enable';
}
return $state;
}
/** Private _is_ Methods **************************************************/
/**
* Is this the initial page request?
*
* Note that we do not use get_query_var() - it returns '' for all requests,
* which is valid for /post-name/liveblog/
*
* @global WP_Query $wp_query
* @return bool
*/
private static function is_initial_page_request() {
global $wp_query;
return (bool) ! isset( $wp_query->query_vars[ self::KEY ] );
}
/**
* Is this an ajax request for the entries?
*
* @uses get_query_var() to check for the URL_ENDPOINT
* @return bool
*/
private static function is_entries_ajax_request() {
return (bool) get_query_var( self::URL_ENDPOINT );
}
/**
* Get timestamps from the current WP_Query
*
* Ensures that two timestamps exist, and returns a properly formatted empty
* array if not.
*
* @return array
*/
private static function get_timestamps_from_query() {
// Look for timestamps and bail if none
$stamps = rtrim( get_query_var( self::URL_ENDPOINT ), '/' );
if ( empty( $stamps ) ) {
return array( false, false );
}
// Get timestamps from the query variable
$timestamps = explode( '/', $stamps );
// Bail if there are not 2 timestamps
if ( 2 !== count( $timestamps ) ) {
return array( false, false );
}
// Return integer timestamps in an array
return array_map( 'intval', $timestamps );
}
// HANDLES THE CRUD ACTIONS FOR THE COMMENTS
public static function ajax_crud_entry() {
self::ajax_current_user_can_edit_liveblog();
self::ajax_check_nonce();
$args = array();
$crud_action = isset( $_POST['crud_action'] ) ? sanitize_text_field( wp_unslash( $_POST['crud_action'] ) ) : 0; // input var ok
if ( ! self::is_valid_crud_action( $crud_action ) ) {
// translators: 1: crud action
self::send_user_error( sprintf( __( 'Invalid entry crud_action: %s', 'liveblog' ), $crud_action ) );
}
$args['post_id'] = isset( $_POST['post_id'] ) ? intval( $_POST['post_id'] ) : 0; // input var ok
$args['content'] = isset( $_POST['content'] ) ? sanitize_text_field( wp_unslash( $_POST['content'] ) ) : ''; // input var ok
$args['entry_id'] = isset( $_POST['entry_id'] ) ? intval( $_POST['entry_id'] ) : 0; // input var ok
$args['author_id'] = isset( $_POST['author_id'] ) ? intval( $_POST['author_id'] ) : false; // input var ok
$args['contributor_ids'] = isset( $_POST['contributor_ids'] ) ? sanitize_text_field( wp_unslash( $_POST['contributor_ids'] ) ) : false; // input var ok
$entry = self::do_crud_entry( $crud_action, $args );
if ( is_wp_error( $entry ) ) {
self::send_server_error( $entry->get_error_message() );
}
if ( WPCOM_Liveblog_Socketio_Loader::is_enabled() ) {
WPCOM_Liveblog_Socketio::emit(
'liveblog entry',
$entry->for_json()
);
} else {
// Do not send latest_timestamp. If we send it the client won't get
// older entries. Since we send only the new one, we don't know if there
// weren't any entries in between.
self::json_return(
array(
'entries' => array( $entry->for_json() ),
'latest_timestamp' => null,
), array( 'cache' => false )
);
}
}
/**
* Perform a specific CRUD action on an entry for a post
*
* @param string $crud_action Allowed actions are insert|update|delete|delete_key
* @param array $args An array of data to be passed to the crud method
*
* @return mixed The result of the crud method
*/
public static function do_crud_entry( $crud_action, $args ) {
$args['user'] = wp_get_current_user();
$entry = call_user_func( array( 'WPCOM_Liveblog_Entry', $crud_action ), $args );
if ( ! is_wp_error( $entry ) ) {
// Do not send latest_timestamp. If we send it the client won't get
// older entries. Since we send only the new one, we don't know if there
// weren't any entries in between.
$entry = array(
'entries' => array( $entry->for_json() ),
'latest_timestamp' => null,
);
}
return $entry;
}
/**
* Fetches the Liveblog entry with the ID given in the $_GET superglobal, and returns it via JSON.
*/
public static function ajax_single_entry() {
// The URL is of the form "entry/entry_id".
$fragments = explode( '/', get_query_var( self::URL_ENDPOINT ) );
$entry_id = isset( $fragments[1] ) ? $fragments[1] : '';
$result_for_json = self::get_single_entry( $entry_id );
self::json_return( $result_for_json );
}
/**
* Get a single Liveblog entry for a post by entry ID
*
* @param int $entry_id The ID of the entry
*
* @return array An array of entry data
*/
public static function get_single_entry( $entry_id ) {
$entries = array();
$previous_timestamp = 0;
$next_timestamp = 0;
if ( empty( self::$entry_query ) ) {
self::$entry_query = new WPCOM_Liveblog_Entry_Query( self::$post_id, self::KEY );
}
// Why not just get the single entry rather than all?
$all_entries = array_values( self::$entry_query->get_all() );
foreach ( $all_entries as $key => $entry ) {
if ( $entry_id !== $entry->get_id() ) {
continue;
}
$entries = array( $entry );
if ( isset( $all_entries[ $key - 1 ] ) ) {
$previous_entry = $all_entries[ $key - 1 ];
$next_timestamp = $previous_entry->get_timestamp();
}
if ( isset( $all_entries[ $key + 1 ] ) ) {
$next_entry = $all_entries[ $key + 1 ];
$previous_timestamp = $next_entry->get_timestamp();
}
break;
}
$entries_for_json = array();
// Set up an array containing the JSON data for Liveblog entry.
foreach ( $entries as $entry ) {
$entries_for_json[] = $entry->for_json();
}
// Set up the data to be returned via JSON.
$result_for_json = array(
'entries' => $entries_for_json,
);
if ( ! empty( $entries_for_json ) ) {
// Entries found
$result_for_json['index'] = (int) filter_input( INPUT_GET, 'index' );
$result_for_json['nextTimestamp'] = $next_timestamp;
$result_for_json['previousTimestamp'] = $previous_timestamp;
do_action( 'liveblog_entry_request', $result_for_json );
self::$do_not_cache_response = true;
} else {
// No entries
do_action( 'liveblog_entry_request_empty' );
}
return $result_for_json;
}
/**
* Fetches all Liveblog entries that are to be lazyloaded, and returns them via JSON.
*/
public static function ajax_lazyload_entries() {
// The URL is of the form "lazyload/optional_max_timestamp/optional_min_timestamp".
$fragments = explode( '/', get_query_var( self::URL_ENDPOINT ) );
// Get all Liveblog entries that are to be lazyloaded.
$result_for_json = self::get_lazyload_entries(
isset( $fragments[1] ) ? (int) $fragments[1] : 0,
isset( $fragments[2] ) ? (int) $fragments[2] : 0
);
self::json_return( $result_for_json );
}
/**
* Get all Liveblog entries that are to be lazyloaded.
*
* @param int $max_timestamp Maximum timestamp for the Liveblog entries.
* @param int $min_timestamp Minimum timestamp for the Liveblog entries.
*
* @return array An array of json encoded results
*/
public static function get_lazyload_entries( $max_timestamp, $min_timestamp ) {
if ( empty( self::$entry_query ) ) {
self::$entry_query = new WPCOM_Liveblog_Entry_Query( self::$post_id, self::KEY );
}
// Get all Liveblog entries that are to be lazyloaded.
$entries = self::$entry_query->get_for_lazyloading( $max_timestamp, $min_timestamp );
$entries_for_json = array();
if ( ! empty( $entries ) ) {
$entries = array_slice( $entries, 0, WPCOM_Liveblog_Lazyloader::get_number_of_entries() );
// Populate an array containing the JSON data for all Liveblog entries.
foreach ( $entries as $entry ) {
$entries_for_json[] = $entry->for_json();
}
}
$result = array(
'entries' => $entries_for_json,
'index' => (int) filter_input( INPUT_GET, 'index' ),
);
if ( ! empty( $entries_for_json ) ) {
do_action( 'liveblog_entry_request', $result );
self::$do_not_cache_response = true;
} else {
do_action( 'liveblog_entry_request_empty' );
}
return $result;
}
/**
* Get single entry
*
* @param int $id entry id
* @return array An array of json encoded results
*/
public static function get_single_liveblog_entry( $id = false ) {
if ( empty( self::$entry_query ) ) {
self::$entry_query = new WPCOM_Liveblog_Entry_Query( self::$post_id, self::KEY );
}
$entry = self::$entry_query->get_by_id( $id );
//var_dump( $entry );
//die();
}
/**
* Get all entries for specific page
*
* @param int $page Requested Page.
* @param string $last_know_entry id-timestamp of the last rendered entry.
* @param int $id entry id
* @return array An array of json encoded results
*/
public static function get_entries_paged( $page, $last_known_entry = false, $id = false ) {
if ( empty( self::$entry_query ) ) {
self::$entry_query = new WPCOM_Liveblog_Entry_Query( self::$post_id, self::KEY );
}
$per_page = WPCOM_Liveblog_Lazyloader::get_number_of_entries();
$entries = self::$entry_query->get_all_entries_asc();
$entries = self::flatten_entries( $entries );
if ( $last_known_entry ) {
$last_known_entry = explode( '-', $last_known_entry );
if ( isset( $last_known_entry[0], $last_known_entry[1] ) ) {
$last_entry_id = (int) $last_known_entry[0];
$index = array_search( $last_entry_id, array_keys( $entries ), true );
$entries = array_slice( $entries, $index, null, true );
}
}
$pages = ceil( count( $entries ) / $per_page );
//If no page is passed but entry id is, we search for the correct page.
if ( false === $page && false !== $id ) {
$index = array_search( (int) $id, array_keys( $entries ), true );
$index = $index + 1;
$page = ceil( $index / $per_page );
}
$offset = $per_page * ( $page - 1 );
$entries = array_slice( $entries, $offset, $per_page );
$entries = self::entries_for_json( $entries );
$result = array(
'entries' => $entries,
'page' => (int) $page,
'pages' => (int) $pages,
);
if ( ! empty( $entries_for_json ) ) {
do_action( 'liveblog_entry_request', $result );
self::$do_not_cache_response = true;
} else {
do_action( 'liveblog_entry_request_empty' );
}
return $result;
}
/**
* Convert array of entries to there json response.
* @param type $entries
* @return array
*/
public static function entries_for_json( $entries ) {
$entries_for_json = array();
foreach ( $entries as $entry ) {
$entries_for_json[] = $entry->for_json();
}
return $entries_for_json;
}
/**
* Flattens Entries by running updates and deletes to get actual
* list of entries
*
* @param array $entires
* @return array
*/
public static function flatten_entries( $entries ) {
if ( empty( $entries ) || ! is_array( $entries ) ) {
return array();
}
$flatten = array();
foreach ( $entries as $entry ) {
$type = $entry->get_type();
$id = $entry->get_id();
if ( ! empty( $entry->replaces ) ) {
$id = $entry->replaces;
}
switch ( $type ) {
case 'new':
$flatten[ $id ] = $entry;
break;
case 'update':
$flatten[ $id ] = $entry;
break;
case 'delete':
unset( $flatten[ $id ] );
break;
default:
continue;
}
}
return array_reverse( $flatten, true );
}
public static function ajax_preview_entry() {
$entry_content = isset( $_REQUEST['entry_content'] ) ? sanitize_text_field( wp_unslash( $_REQUEST['entry_content'] ) ) : ''; // input var ok
$entry_content = self::format_preview_entry( $entry_content );
self::json_return( $entry_content );
}
/**
* Format the passed in content and give it back in an array
*
* @param string $entry_content The entry content to be previewed
*
* @return array The entry content wrapped in HTML elements
*/
public static function format_preview_entry( $entry_content ) {
$entry_content = stripslashes( wp_filter_post_kses( $entry_content ) );
$entry_content = apply_filters( 'liveblog_before_preview_entry', array( 'content' => $entry_content ) );
$entry_content = $entry_content['content'];
$entry_content = WPCOM_Liveblog_Entry::render_content( $entry_content );
do_action( 'liveblog_preview_entry', $entry_content );
return array( 'html' => $entry_content );
}
public static function ajax_unknown() {
self::send_user_error( __( 'Unknown liveblog action', 'liveblog' ) );
}
/** Comment Methods *******************************************************/
/**
* Add a liveblog class to each comment, so they can be styled
*
* @param array $classes
* @return string
*/
public static function add_comment_class( $classes, $class, $comment_id ) {
if ( self::KEY === get_comment_type( $comment_id ) ) {
$classes[] = 'liveblog-entry';
$classes[] = 'liveblog-entry-class-' . $comment_id;
}
return $classes;
}
public static function admin_enqueue_scripts( $hook_suffix ) {
global $post;
// Enqueue admin scripts only if adding or editing a supported post type.
if ( in_array( $hook_suffix, array( 'post.php', 'post-new.php' ), true ) && post_type_supports( get_post_type(), self::KEY ) ) {
$endpoint_url = '';
$use_rest_api = 0;
if ( self::use_rest_api() ) {
$endpoint_url = WPCOM_Liveblog_Rest_Api::build_endpoint_base() . $post->ID . '/post_state';
$use_rest_api = 1;
}
wp_enqueue_style( self::KEY, plugins_url( 'assets/dashboard/app.css', __FILE__ ) );
wp_enqueue_script( 'liveblog-admin', plugins_url( 'assets/dashboard/app.js', __FILE__ ) );
wp_localize_script(
'liveblog-admin', 'liveblog_admin_settings', array(
'nonce_key' => self::NONCE_KEY,
'nonce' => wp_create_nonce( self::NONCE_ACTION ),
'error_message_template' => __( 'Error {error-code}: {error-message}', 'liveblog' ),
'short_error_message_template' => __( 'Error: {error-message}', 'liveblog' ),
'use_rest_api' => $use_rest_api,
'endpoint_url' => $endpoint_url,
)
);
}
}
/**
* Enqueue the necessary CSS and JS that liveblog needs to function.