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Extract chats as structured data.
* add_chat_detection_format() — to add a chat regex pattern * get_content_chat() — to grab a chat from content * get_the_chat() — grab the chat from the current (or passed) post * the_chat() — output the chat in formatted HTML * paginate_content() — puts the <!--nextpage--> splitting stuff into a function * get_paged_content() — grabs a page of raw content, needed to paginate chats properly see #23625. props wonderboymusic, lancewillett. git-svn-id: http://core.svn.wordpress.org/trunk@23804 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This commit is contained in:
Mark Jaquith
parent
6bf47b869f
commit
e11cb17f77
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@ -391,6 +391,219 @@ function post_formats_compat( $content, $id = 0 ) {
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return $output;
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}
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/**
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* Add chat detection support to the `get_content_chat()` chat parser
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*
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* @since 3.6.0
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*
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* @global array $_wp_chat_parsers
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* @param string $name Unique identifier for chat format. Example: IRC
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* @param string $newline_regex RegEx to match the start of a new line, typically when a new "username:" appears
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* The parser will handle up to 3 matched expressions
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* $matches[0] = the string before the user's message starts
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* $matches[1] = the time of the message, if present
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* $matches[2] = the author/username
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* OR
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* $matches[0] = the string before the user's message starts
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* $matches[1] = the author/username
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* @param string $delimiter_regex RegEx to determine where to split the username syntax from the chat message
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*/
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function add_chat_detection_format( $name, $newline_regex, $delimiter_regex ) {
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global $_wp_chat_parsers;
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if ( empty( $_wp_chat_parsers ) )
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$_wp_chat_parsers = array();
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$_wp_chat_parsers = array( $name => array( $newline_regex, $delimiter_regex ) ) + $_wp_chat_parsers;
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}
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add_chat_detection_format( 'IM', '#^([^:]+):#', '#[:]#' );
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add_chat_detection_format( 'Skype', '#^(\[.+?\])\s([^:]+):#', '#[:]#' );
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/**
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* Deliberately interpret passed content as a chat transcript that is optionally
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* followed by commentary
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*
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* If the content does not contain username syntax, assume that it does not contain
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* chat logs and return
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*
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* @since 3.6.0
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*
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* Example:
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*
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* One stanza of chat:
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* Scott: Hey, let's chat!
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* Helen: No.
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*
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* $stanzas = array(
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* array(
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* array(
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* 'time' => '',
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* 'author' => 'Scott',
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* 'messsage' => "Hey, let's chat!"
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* ),
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* array(
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* 'time' => '',
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* 'author' => 'Helen',
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* 'message' => 'No.'
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* )
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* )
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* )
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* @param string $content A string which might contain chat data.
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* @param boolean $remove Whether to remove the found data from the passed content.
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* @return array A chat log as structured data
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*/
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function get_content_chat( &$content, $remove = false ) {
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global $_wp_chat_parsers;
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$trimmed = trim( $content );
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if ( empty( $trimmed ) )
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return array();
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$has_match = false;
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$matched_parser = false;
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foreach ( $_wp_chat_parsers as $parser ) {
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@list( $newline_regex ) = $parser;
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if ( preg_match( $newline_regex, $trimmed ) ) {
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$has_match = true;
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$matched_parser = $parser;
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break;
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}
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}
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if ( false === $matched_parser )
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return array();
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@list( $newline_regex, $delimiter_regex ) = $parser;
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$last_index = 0;
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$stanzas = array();
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$lines = explode( "\n", make_clickable( $trimmed ) );
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$author = $time = '';
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$data = array();
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$stanza = array();
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foreach ( $lines as $index => $line ) {
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$line = trim( $line );
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if ( empty( $line ) ) {
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if ( ! empty( $author ) ) {
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$stanza[] = array(
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'time' => $time,
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'author' => $author,
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'message' => join( ' ', $data )
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);
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}
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$stanzas[] = $stanza;
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$last_index = $index;
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$stanza = array();
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$author = $time = '';
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$data = array();
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if ( ! empty( $lines[$index + 1] ) && ! preg_match( $delimiter_regex, $lines[$index + 1] ) )
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break;
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}
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$matches = array();
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$matched = preg_match( $newline_regex, $line, $matches );
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$author_match = empty( $matches[2] ) ? $matches[1] : $matches[2];
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// assume username syntax if no whitespace is present
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$no_ws = $matched && ! preg_match( '#\s#', $author_match );
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// allow script-like stanzas
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$has_ws = $matched && preg_match( '#\s#', $author_match ) && empty( $lines[$index + 1] ) && empty( $lines[$index - 1] );
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if ( $matched && ( ! empty( $matches[2] ) || ( $no_ws || $has_ws ) ) ) {
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if ( ! empty( $author ) ) {
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$stanza[] = array(
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'time' => $time,
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'author' => $author,
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'message' => join( ' ', $data )
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);
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$data = array();
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}
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$time = empty( $matches[2] ) ? '' : $matches[1];
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$author = $author_match;
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$data[] = trim( str_replace( $matches[0], '', $line ) );
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} elseif ( preg_match( '#\S#', $line ) ) {
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$data[] = $line;
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}
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}
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if ( ! empty( $author ) ) {
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$stanza[] = array(
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'time' => $time,
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'author' => $author,
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'message' => trim( join( ' ', $data ) )
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);
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}
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if ( ! empty( $stanza ) )
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$stanzas[] = $stanza;
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if ( $remove )
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$content = trim( join( "\n", array_slice( $lines, $last_index ) ) );
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return $stanzas;
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}
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/**
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* Retrieve structured chat data from the current or passed post
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*
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* @since 3.6.0
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*
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* @param int $id Optional. Post ID
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* @return array
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*/
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function get_the_chat( $id = 0 ) {
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$post = empty( $id ) ? clone get_post() : get_post( $id );
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if ( empty( $post ) )
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return array();
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$data = get_content_chat( get_paged_content( $post->post_content ) );
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if ( empty( $data ) )
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return array();
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return $data;
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}
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/**
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* Output HTML for a given chat's structured data. Themes can use this as a
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* template tag in place of the_content() for Chat post format templates.
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*
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* @since 3.6.0
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*
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* @uses get_the_chat()
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*
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* @print HTML
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*/
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function the_chat() {
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$output = '<dl class="chat-transcript">';
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$stanzas = get_the_chat();
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foreach ( $stanzas as $stanza ) {
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foreach ( $stanza as $row ) {
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$time = '';
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if ( ! empty( $row['time'] ) )
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$time = sprintf( '<time>%s</time>', esc_html( $row['time'] ) );
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$output .= sprintf(
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'<dt class="chat-author chat-author-%1$s vcard">%2$s <cite class="fn">%3$s</cite>: </dt>
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<dd class="chat-text">%4$s</dd>
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',
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esc_attr( strtolower( $row['author'] ) ), // Slug.
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$time,
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esc_html( $row['author'] ),
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esc_html( $row['message'] )
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);
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}
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}
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$output .= '</dl><!-- .chat-transcript -->';
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echo $output;
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}
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/**
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* Extract a URL from passed content, if possible
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* Checks for a URL on the first line of the content or the first encountered href attribute.
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@ -3621,6 +3621,51 @@ function wp_old_slug_redirect() {
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exit;
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endif;
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}
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/**
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* Split the passed content by <!--nextpage-->
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*
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* @since 3.6.0
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*
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* @param string $content Content to split
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* @return array Paged content
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*/
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function paginate_content( $content ) {
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$content = str_replace( "\n<!--nextpage-->\n", '<!--nextpage-->', $content );
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$content = str_replace( "\n<!--nextpage-->", '<!--nextpage-->', $content );
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$content = str_replace( "<!--nextpage-->\n", '<!--nextpage-->', $content );
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return explode( '<!--nextpage-->', $content);
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}
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/**
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* Return content offset by $page
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*
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* @since 3.6.0
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*
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* @param string $content
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* @return string
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*/
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function get_paged_content( $content = null, $paged = null ) {
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global $page;
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if ( empty( $page ) )
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$page = 1;
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if ( empty( $paged ) )
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$paged = $page;
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if ( empty( $content ) ) {
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$post = get_post();
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if ( empty( $post ) )
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return;
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$content = $post->post_content;
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}
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$pages = paginate_content( $content );
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if ( isset( $pages[$paged - 1] ) )
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return $pages[$paged - 1];
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return reset( $pages );
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}
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/**
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* Set up global post data.
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