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<?php
/**
* Class that takes chat text and turns it into a nice, HTML-formatted transcript. This is meant to
* be used alongside the "chat" post format.
*
* @package Hybrid
* @subpackage Includes
* @author David Chandra <david.warna@gmail.com>
* @author Justin Tadlock <justin@justintadlock.com>
* @copyright Copyright (c) 2008 - 2015, Justin Tadlock
* @link http://themehybrid.com/hybrid-core
* @link http://justintadlock.com/archives/2012/08/21/post-formats-chat
* @license http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
*/
/**
* Class for handling chat transcripts.
*
* @since 3.0.0
* @access public
* @return void
*/
class Hybrid_Chat {
/**
* Holds the array of authors in the chat.
*
* @since 3.0.0
* @access public
* @var array
*/
public $authors = array();
/**
* Holds the array of stanzas in the chat. Stanzas are groups of text. Generally, these
* will belong to different speakers, but multiple stanzas, back-to-back can belong to
* a single author.
*
* @since 3.0.0
* @access public
* @var array
*/
public $stanzas = array();
/**
* The chat content to be formatted.
*
* @since 3.0.0
* @access public
* @var string
*/
public $content = '';
/**
* Separator between stanza author and message.
*
* @since 3.0.0
* @access public
* @var string
*/
public $separator = ':';
/**
* Constructor method.
*
* @since 3.0.0
* @access public
* @param string $content
* @return void
*/
public function __construct( $content ) {
$this->content = $content;
$this->separator = apply_filters( 'hybrid_post_format_chat_separator', $this->separator );
// Filters for the chat author.
add_filter( 'hybrid_chat_author', 'strip_tags' );
// Filters for the chat message.
add_filter( 'hybrid_chat_text', array( $this, 'format_chat_text' ), 5 );
add_filter( 'hybrid_chat_text', 'wpautop', 5 );
// Set the stanzas.
$this->set_stanzas();
}
/**
* Returns the formatted chat transcript.
*
* @since 3.0.0
* @access public
* @return string
*/
public function get_transcript() {
$output = $current_author = '';
// Loop through the stanzas.
foreach ( $this->stanzas as $stanza ) {
// Get the chat author.
$author = ! empty( $stanza['author'] ) ? $stanza['author'] : '';
// If we have an author, set the current author.
if ( $author )
$current_author = $author;
// Get the speaker/row ID.
$speaker_id = $this->get_author_id( $current_author );
// Format the time if there was one given.
$time = ! empty( $stanza['time'] ) ? sprintf( '<time class="chat-timestamp">%s</time> ', esc_html( $stanza['time'] ) ) : '';
// Add the chat row author.
if ( $author )
$author = sprintf( '<div class="chat-author %s vcard">%s<cite class="fn">%s</cite></div>', sanitize_html_class( strtolower( "chat-author-{$author}" ) ), $time, apply_filters( 'hybrid_chat_author', $author ) );
// Add the chat row text.
$message = sprintf( '<div class="chat-text">%s</div>', apply_filters( 'hybrid_chat_text', $stanza['message'] ) );
// Format the entire stanza.
$output .= sprintf( '<div class="chat-stanza chat-row %s">%s %s</div>', sanitize_html_class( "chat-speaker-{$speaker_id}" ), $author, $message );
}
// Wrap the entire output and return.
return sprintf( '<div class="chat-transcript">%s</div>', $output );
}
/**
* Finds and stores the stanzas.
*
* @since 3.0.0
* @access public
* @return void
*/
protected function set_stanzas() {
// Splits the content into multiple stanzas.
$stanzas = preg_split( "/(\r?\n)+|(<br\s*\/?>\s*)+/", $this->content );
// Loops through the stanzas and gets individual stanza arrays.
foreach ( $stanzas as $stanza_content )
$this->stanzas[] = $this->get_stanza( $stanza_content );
}
/**
* Gets a specific stanza. Expected input is a single stanza.
*
* @todo Figure out how to split between author/time/message.
* @since 3.0.0
* @access public
* @param string $content
* @return array
*/
protected function get_stanza( $content ) {
// If a speaker is found, split into array with author/message.
if ( preg_match( '/(?<!http|https)' . $this->separator . '/', $content ) ) {
list( $author, $message ) = explode( $this->separator, trim( $content ), 2 );
return array( 'author' => $author, 'message' => $message );
}
// Return just the message.
return array( 'author' => '', 'message' => $content ? $content : '' );
}
/**
* Gets an ID based on the author name. This keeps track of how many authors there are so
* that chats with multiple people will have a unique ID based on the person.
*
* @since 3.0.0
* @access public
* @param string $author
* @return int
*/
protected function get_author_id( $author ) {
// Let's sanitize the chat author to avoid craziness and differences like "John" and "john".
$author = strtolower( strip_tags( $author ) );
// Add the chat author to the array.
if ( ! in_array( $author, $this->authors ) )
$this->authors[] = $author;
// Return the array key for the chat author and add "1" to avoid an ID of "0".
return absint( array_search( $author, $this->authors ) ) + 1;
}
/**
* Formats the chat text to remove crazy whitespace.
*
* @since 3.0.0
* @access public
* @param string $text
* @return string
*/
public function format_chat_text( $text ) {
return trim( str_replace( array( "\r", "\n", "\t" ), '', $text ) );
}
}