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<?php
/**
* bbPress Formatting
*
* @package bbPress
* @subpackage Formatting
*/
// Exit if accessed directly
defined( 'ABSPATH' ) || exit;
/** Kses **********************************************************************/
/**
* Custom allowed tags for forum topics and replies
*
* Allows all users to post links, quotes, code, formatting, lists, and images
*
* @since 2.3.0 bbPress (r4603)
*
* @return array Associative array of allowed tags and attributes
*/
function bbp_kses_allowed_tags() {
// Filter & return
return (array) apply_filters( 'bbp_kses_allowed_tags', array(
// Links
'a' => array(
'href' => true,
'title' => true,
'rel' => true,
'target' => true
),
// Quotes
'blockquote' => array(
'cite' => true
),
// Code
'code' => array(),
'pre' => array(
'class' => true
),
// Formatting
'em' => array(),
'strong' => array(),
'del' => array(
'datetime' => true,
'cite' => true
),
'ins' => array(
'datetime' => true,
'cite' => true
),
// Lists
'ul' => array(),
'ol' => array(
'start' => true,
),
'li' => array(),
// Images
'img' => array(
'src' => true,
'border' => true,
'alt' => true,
'height' => true,
'width' => true,
)
) );
}
/**
* Custom kses filter for forum topics and replies, for filtering incoming data
*
* @since 2.3.0 bbPress (r4603)
*
* @param string $data Content to filter, expected to be escaped with slashes
* @return string Filtered content
*/
function bbp_filter_kses( $data = '' ) {
return wp_slash( wp_kses( wp_unslash( $data ), bbp_kses_allowed_tags() ) );
}
/**
* Custom kses filter for forum topics and replies, for raw data
*
* @since 2.3.0 bbPress (r4603)
*
* @param string $data Content to filter, expected to not be escaped
* @return string Filtered content
*/
function bbp_kses_data( $data = '' ) {
return wp_kses( $data , bbp_kses_allowed_tags() );
}
/** Formatting ****************************************************************/
/**
* Filter the topic or reply content and output code and pre tags
*
* @since 2.3.0 bbPress (r4641)
*
* @param string $content Topic and reply content
* @return string Partially encoded content
*/
function bbp_code_trick( $content = '' ) {
$content = str_replace( array( "\r\n", "\r" ), "\n", $content );
$content = preg_replace_callback( "|(`)(.*?)`|", 'bbp_encode_callback', $content );
$content = preg_replace_callback( "!(^|\n)`(.*?)`!s", 'bbp_encode_callback', $content );
return $content;
}
/**
* When editing a topic or reply, reverse the code trick so the textarea
* contains the correct editable content.
*
* @since 2.3.0 bbPress (r4641)
*
* @param string $content Topic and reply content
* @return string Partially encoded content
*/
function bbp_code_trick_reverse( $content = '' ) {
// Setup variables
$openers = array( '<p>', '<br />' );
$content = preg_replace_callback( "!(<pre><code>|<code>)(.*?)(</code></pre>|</code>)!s", 'bbp_decode_callback', $content );
// Do the do
$content = str_replace( $openers, '', $content );
$content = str_replace( '</p>', "\n", $content );
$content = str_replace( '<coded_br />', '<br />', $content );
$content = str_replace( '<coded_p>', '<p>', $content );
$content = str_replace( '</coded_p>', '</p>', $content );
return $content;
}
/**
* Filter the content and encode any bad HTML tags
*
* @since 2.3.0 bbPress (r4641)
*
* @param string $content Topic and reply content
* @return string Partially encoded content
*/
function bbp_encode_bad( $content = '' ) {
// Setup variables
$content = _wp_specialchars( $content, ENT_NOQUOTES );
$content = preg_split( '@(`[^`]*`)@m', $content, -1, PREG_SPLIT_NO_EMPTY + PREG_SPLIT_DELIM_CAPTURE );
$allowed = bbp_kses_allowed_tags();
$empty = array(
'br' => true,
'hr' => true,
'img' => true,
'input' => true,
'param' => true,
'area' => true,
'col' => true,
'embed' => true
);
// Loop through allowed tags and compare for empty and normal tags
foreach ( $allowed as $tag => $args ) {
$preg = $args ? "{$tag}(?:\s.*?)?" : $tag;
// Which walker to use based on the tag and arguments
if ( isset( $empty[ $tag ] ) ) {
array_walk( $content, 'bbp_encode_empty_callback', $preg );
} else {
array_walk( $content, 'bbp_encode_normal_callback', $preg );
}
}
// Return the joined content array
return implode( '', $content );
}
/** Code Callbacks ************************************************************/
/**
* Callback to encode the tags in topic or reply content
*
* @since 2.3.0 bbPress (r4641)
*
* @param array $matches
* @return string
*/
function bbp_encode_callback( $matches = array() ) {
// Trim inline code, not pre blocks (to prevent removing indentation)
if ( "`" === $matches[1] ) {
$content = trim( $matches[2] );
} else {
$content = $matches[2];
}
// Do some replacing
$content = htmlspecialchars( $content, ENT_QUOTES );
$content = str_replace( array( "\r\n", "\r" ), "\n", $content );
$content = preg_replace( "|\n\n\n+|", "\n\n", $content );
$content = str_replace( '&amp;', '&', $content );
$content = str_replace( '&lt;', '<', $content );
$content = str_replace( '&gt;', '>', $content );
// Wrap in code tags
$content = '<code>' . $content . '</code>';
// Wrap blocks in pre tags
if ( "`" !== $matches[1] ) {
$content = "\n<pre>" . $content . "</pre>\n";
}
return $content;
}
/**
* Callback to decode the tags in topic or reply content
*
* @since 2.3.0 bbPress (r4641)
*
* @param array $matches
* @todo Experiment with _wp_specialchars()
* @return string
*/
function bbp_decode_callback( $matches = array() ) {
// Setup variables
$trans_table = array_flip( get_html_translation_table( HTML_ENTITIES ) );
$amps = array( '&','&', '&' );
$single = array( ''',''' );
$content = $matches[2];
$content = strtr( $content, $trans_table );
// Do the do
$content = str_replace( '<br />', '<coded_br />', $content );
$content = str_replace( '<p>', '<coded_p>', $content );
$content = str_replace( '</p>', '</coded_p>', $content );
$content = str_replace( $amps, '&', $content );
$content = str_replace( $single, "'", $content );
// Return content wrapped in code tags
return '`' . $content . '`';
}
/**
* Callback to replace empty HTML tags in a content string
*
* @since 2.3.0 bbPress (r4641)
*
* @internal Used by bbp_encode_bad()
* @param string $content
* @param string $key Not used
* @param string $preg
*/
function bbp_encode_empty_callback( &$content = '', $key = '', $preg = '' ) {
if ( strpos( $content, '`' ) !== 0 ) {
$content = preg_replace( "|<({$preg})\s*?/*?>|i", '<$1 />', $content );
}
}
/**
* Callback to replace normal HTML tags in a content string
*
* @since 2.3.0 bbPress (r4641)
*
* @internal Used by bbp_encode_bad()
*
* @param string $content
* @param string $key
* @param string $preg
*/
function bbp_encode_normal_callback( &$content = '', $key = '', $preg = '') {
if ( strpos( $content, '`' ) !== 0 ) {
$content = preg_replace( "|<(/?{$preg})>|i", '<$1>', $content );
}
}
/** No Follow *****************************************************************/
/**
* Catches links so rel=nofollow can be added (on output, not save)
*
* @since 2.3.0 bbPress (r4865)
*
* @param string $text Post text
* @return string $text Text with rel=nofollow added to any links
*/
function bbp_rel_nofollow( $text = '' ) {
return preg_replace_callback( '|<a (.+?)>|i', 'bbp_rel_nofollow_callback', $text );
}
/**
* Adds rel=nofollow to a link
*
* @since 2.3.0 bbPress (r4865)
*
* @param array $matches
* @return string $text Link with rel=nofollow added
*/
function bbp_rel_nofollow_callback( $matches = array() ) {
$text = $matches[1];
$atts = shortcode_parse_atts( $matches[1] );
$rel = 'nofollow';
$home_url = home_url();
// Bail on links that match the current domain
if ( preg_match( '%href=["\'](' . preg_quote( set_url_scheme( $home_url, 'http' ) ) . ')%i', $text ) ||
preg_match( '%href=["\'](' . preg_quote( set_url_scheme( $home_url, 'https' ) ) . ')%i', $text )
) {
return "<a {$text}>";
}
// Avoid collisions with existing "rel" attribute
if ( ! empty( $atts['rel'] ) ) {
$parts = array_map( 'trim', explode( ' ', $atts['rel'] ) );
if ( false === array_search( 'nofollow', $parts ) ) {
$parts[] = 'nofollow';
}
$rel = implode( ' ', $parts );
unset( $atts['rel'] );
$html = '';
foreach ( $atts as $name => $value ) {
$html .= "{$name}=\"{$value}\" ";
}
$text = trim( $html );
}
return "<a {$text} rel=\"{$rel}\">";
}
/** Make Clickable ************************************************************/
/**
* Convert plaintext URI to HTML links.
*
* Converts URI, www and ftp, and email addresses. Finishes by fixing links
* within links.
*
* This custom version of WordPress's make_clickable() skips links inside of
* pre and code tags.
*
* @since 2.4.0 bbPress (r4941)
*
* @param string $text Content to convert URIs.
* @return string Content with converted URIs.
*/
function bbp_make_clickable( $text = '' ) {
$r = '';
$textarr = preg_split( '/(<[^<>]+>)/', $text, -1, PREG_SPLIT_DELIM_CAPTURE ); // split out HTML tags
$nested_code_pre = 0; // Keep track of how many levels link is nested inside <pre> or <code>
foreach ( $textarr as $piece ) {
if ( preg_match( '|^<code[\s>]|i', $piece ) || preg_match( '|^<pre[\s>]|i', $piece ) || preg_match( '|^<script[\s>]|i', $piece ) || preg_match( '|^<style[\s>]|i', $piece ) ) {
$nested_code_pre++;
} elseif ( $nested_code_pre && ( '</code>' === strtolower( $piece ) || '</pre>' === strtolower( $piece ) || '</script>' === strtolower( $piece ) || '</style>' === strtolower( $piece ) ) ) {
$nested_code_pre--;
}
if ( $nested_code_pre || empty( $piece ) || ( $piece[0] === '<' && ! preg_match( '|^<\s*[\w]{1,20}+://|', $piece ) ) ) {
$r .= $piece;
continue;
}
// Long strings might contain expensive edge cases ...
if ( 10000 < strlen( $piece ) ) {
// ... break it up
foreach ( _split_str_by_whitespace( $piece, 2100 ) as $chunk ) { // 2100: Extra room for scheme and leading and trailing paretheses
if ( 2101 < strlen( $chunk ) ) {
$r .= $chunk; // Too big, no whitespace: bail.
} else {
$r .= bbp_make_clickable( $chunk );
}
}
} else {
$ret = " {$piece} "; // Pad with whitespace to simplify the regexes
$ret = apply_filters( 'bbp_make_clickable', $ret, $text );
$ret = substr( $ret, 1, -1 ); // Remove our whitespace padding.
$r .= $ret;
}
}
// Cleanup of accidental links within links
return preg_replace( '#(<a([ \r\n\t]+[^>]+?>|>))<a [^>]+?>([^>]+?)</a>([^<]*)</a>#i', "$1$3$4</a>", $r );
}
/**
* Make URLs clickable in content areas
*
* @since 2.6.0 bbPress (r6014)
*
* @param string $text
* @return string
*/
function bbp_make_urls_clickable( $text = '' ) {
$url_clickable = '~
([\\s(<.,;:!?]) # 1: Leading whitespace, or punctuation
( # 2: URL
[\\w]{1,20}+:// # Scheme and hier-part prefix
(?=\S{1,2000}\s) # Limit to URLs less than about 2000 characters long
[\\w\\x80-\\xff#%\\~/@\\[\\]*(+=&$-]*+ # Non-punctuation URL character
(?: # Unroll the Loop: Only allow puctuation URL character if followed by a non-punctuation URL character
[\'.,;:!?)] # Punctuation URL character
[\\w\\x80-\\xff#%\\~/@\\[\\]*(+=&$-]++ # Non-punctuation URL character
)*
)
(\)?) # 3: Trailing closing parenthesis (for parethesis balancing post processing)
~xS';
// The regex is a non-anchored pattern and does not have a single fixed starting character.
// Tell PCRE to spend more time optimizing since, when used on a page load, it will probably be used several times.
return preg_replace_callback( $url_clickable, '_make_url_clickable_cb', $text );
}
/**
* Make FTP clickable in content areas
*
* @since 2.6.0 bbPress (r6014)
*
* @see make_clickable()
*
* @param string $text
* @return string
*/
function bbp_make_ftps_clickable( $text = '' ) {
return preg_replace_callback( '#([\s>])((www|ftp)\.[\w\\x80-\\xff\#$%&~/.\-;:=,?@\[\]+]+)#is', '_make_web_ftp_clickable_cb', $text );
}
/**
* Make emails clickable in content areas
*
* @since 2.6.0 bbPress (r6014)
*
* @see make_clickable()
*
* @param string $text
* @return string
*/
function bbp_make_emails_clickable( $text = '' ) {
return preg_replace_callback( '#([\s>])([.0-9a-z_+-]+)@(([0-9a-z-]+\.)+[0-9a-z]{2,})#i', '_make_email_clickable_cb', $text );
}
/**
* Make mentions clickable in content areas
*
* @since 2.6.0 bbPress (r6014)
*
* @see make_clickable()
*
* @param string $text
* @return string
*/
function bbp_make_mentions_clickable( $text = '' ) {
return preg_replace_callback( '#([\s>])@([0-9a-zA-Z-_]+)#i', 'bbp_make_mentions_clickable_callback', $text );
}
/**
* Callback to convert mention matches to HTML A tag.
*
* @since 2.6.0 bbPress (r6014)
*
* @param array $matches Regular expression matches in the current text blob.
*
* @return string Original text if no user exists, or link to user profile.
*/
function bbp_make_mentions_clickable_callback( $matches = array() ) {
// Bail if the match is empty malformed
if ( empty( $matches[2] ) || ! is_string( $matches[2] ) ) {
return $matches[0];
}
// Get user; bail if not found
$user = get_user_by( 'slug', $matches[2] );
if ( empty( $user ) || bbp_is_user_inactive( $user->ID ) ) {
return $matches[0];
}
// Default anchor classes
$classes = array(
'bbp-user-mention',
'bbp-user-id-' . absint( $user->ID )
);
// Filter classes
$classes = (array) apply_filters( 'bbp_make_mentions_clickable_classes', $classes, $user );
// Escape & implode if not empty, otherwise an empty string
$class_str = ! empty( $classes )
? implode( ' ', array_map( 'sanitize_html_class', $classes ) )
: '';
// Setup as a variable to avoid a potentially empty class attribute
$class = ! empty( $class_str )
? ' class="' . esc_attr( $class_str ) . '"'
: '';
// Create the link to the user's profile
$html = '<a href="%1$s"' . $class . '>%2$s</a>';
$url = bbp_get_user_profile_url( $user->ID );
$anchor = sprintf( $html, esc_url( $url ), esc_html( $matches[0] ) );
// Prevent this link from being followed by bots
$link = bbp_rel_nofollow( $anchor );
// Concatenate the matches into the return value
$retval = $matches[1] . $link;
// Return the link
return $retval;
}
/** Numbers *******************************************************************/
/**
* Never let a numeric value be less than zero.
*
* @since 2.6.0 bbPress (r6300)
*
* @param int $number
*/
function bbp_number_not_negative( $number = 0 ) {
// Protect against formatted strings
if ( is_string( $number ) ) {
$number = strip_tags( $number ); // No HTML
$number = preg_replace( '/[^0-9-]/', '', $number ); // No number-format
// Protect against objects, arrays, scalars, etc...
} elseif ( ! is_numeric( $number ) ) {
$number = 0;
}
// Make the number an integer
$int = intval( $number );
// Pick the maximum value, never less than zero
$not_less_than_zero = max( 0, $int );
// Filter & return
return (int) apply_filters( 'bbp_number_not_negative', $not_less_than_zero, $int, $number );
}
/**
* A bbPress specific method of formatting numeric values
*
* @since 2.0.0 bbPress (r2486)
*
* @param string $number Number to format
* @param string $decimals Optional. Display decimals
*
* @return string Formatted string
*/
function bbp_number_format( $number = 0, $decimals = false, $dec_point = '.', $thousands_sep = ',' ) {
// If empty, set $number to (int) 0
if ( ! is_numeric( $number ) ) {
$number = 0;
}
// Filter & return
return apply_filters( 'bbp_number_format', number_format( $number, $decimals, $dec_point, $thousands_sep ), $number, $decimals, $dec_point, $thousands_sep );
}
/**
* A bbPress specific method of formatting numeric values
*
* @since 2.1.0 bbPress (r3857)
*
* @param string $number Number to format
* @param string $decimals Optional. Display decimals
*
* @return string Formatted string
*/
function bbp_number_format_i18n( $number = 0, $decimals = false ) {
// If empty, set $number to (int) 0
if ( ! is_numeric( $number ) ) {
$number = 0;
}
// Filter & return
return apply_filters( 'bbp_number_format_i18n', number_format_i18n( $number, $decimals ), $number, $decimals );
}
/** Dates *********************************************************************/
/**
* Convert time supplied from database query into specified date format.
*
* @since 2.0.0 bbPress (r2544)
*
* @param string $time Time to convert
* @param string $d Optional. Default is 'U'. Either 'G', 'U', or php date
* format
* @param bool $translate Optional. Default is false. Whether to translate the
*
* @return string Returns timestamp
*/
function bbp_convert_date( $time, $d = 'U', $translate = false ) {
$new_time = mysql2date( $d, $time, $translate );
// Filter & return
return apply_filters( 'bbp_convert_date', $new_time, $d, $translate, $time );
}
/**
* Output formatted time to display human readable time difference.
*
* @since 2.0.0 bbPress (r2544)
*
* @param string $older_date Unix timestamp from which the difference begins.
* @param string $newer_date Optional. Unix timestamp from which the
* difference ends. False for current time.
* @param int $gmt Optional. Whether to use GMT timezone. Default is false.
*/
function bbp_time_since( $older_date, $newer_date = false, $gmt = false ) {
echo bbp_get_time_since( $older_date, $newer_date, $gmt );
}
/**
* Return formatted time to display human readable time difference.
*
* @since 2.0.0 bbPress (r2544)
*
* @param string $older_date Unix timestamp from which the difference begins.
* @param string $newer_date Optional. Unix timestamp from which the
* difference ends. False for current time.
* @param int $gmt Optional. Whether to use GMT timezone. Default is false.
*
* @return string Formatted time
*/
function bbp_get_time_since( $older_date, $newer_date = false, $gmt = false ) {
// Setup the strings
$unknown_text = apply_filters( 'bbp_core_time_since_unknown_text', esc_html__( 'sometime', 'bbpress' ) );
$right_now_text = apply_filters( 'bbp_core_time_since_right_now_text', esc_html__( 'right now', 'bbpress' ) );
$ago_text = apply_filters( 'bbp_core_time_since_ago_text', esc_html__( '%s ago', 'bbpress' ) );
// array of time period chunks
$chunks = array(
array( YEAR_IN_SECONDS, _n_noop( '%s year', '%s years', 'bbpress' ) ),
array( MONTH_IN_SECONDS, _n_noop( '%s month', '%s months', 'bbpress' ) ),
array( WEEK_IN_SECONDS, _n_noop( '%s week', '%s weeks', 'bbpress' ) ),
array( DAY_IN_SECONDS, _n_noop( '%s day', '%s days', 'bbpress' ) ),
array( HOUR_IN_SECONDS, _n_noop( '%s hour', '%s hours', 'bbpress' ) ),
array( MINUTE_IN_SECONDS, _n_noop( '%s minute', '%s minutes', 'bbpress' ) ),
array( 1, _n_noop( '%s second', '%s seconds', 'bbpress' ) ),
);
// Attempt to parse non-numeric older date
if ( ! empty( $older_date ) && ! is_numeric( $older_date ) ) {
$time_chunks = explode( ':', str_replace( ' ', ':', $older_date ) );
$date_chunks = explode( '-', str_replace( ' ', '-', $older_date ) );
$older_date = gmmktime( (int) $time_chunks[1], (int) $time_chunks[2], (int) $time_chunks[3], (int) $date_chunks[1], (int) $date_chunks[2], (int) $date_chunks[0] );
}
// Attempt to parse non-numeric newer date
if ( ! empty( $newer_date ) && ! is_numeric( $newer_date ) ) {
$time_chunks = explode( ':', str_replace( ' ', ':', $newer_date ) );
$date_chunks = explode( '-', str_replace( ' ', '-', $newer_date ) );
$newer_date = gmmktime( (int) $time_chunks[1], (int) $time_chunks[2], (int) $time_chunks[3], (int) $date_chunks[1], (int) $date_chunks[2], (int) $date_chunks[0] );
}
// Set newer date to current time
if ( empty( $newer_date ) ) {
$newer_date = strtotime( current_time( 'mysql', $gmt ) );
}
// Cast both dates to ints to avoid notices & errors with invalid values
$newer_date = intval( $newer_date );
$older_date = intval( $older_date );
// Difference in seconds
$since = intval( $newer_date - $older_date );
// Something went wrong with date calculation and we ended up with a negative date.
if ( 0 > $since ) {
$output = $unknown_text;
// We only want to output two chunks of time here, eg:
// x years, xx months
// x days, xx hours
// so there's only two bits of calculation below:
} else {
// Default count values
$count = 0;
$count2 = 0;
// Step one: the first chunk
for ( $i = 0, $j = count( $chunks ); $i < $j; ++$i ) {
$seconds = $chunks[ $i ][0];
// Finding the biggest chunk (if the chunk fits, break)
$count = floor( $since / $seconds );
if ( 0 != $count ) {
break;
}
}
// If $i iterates all the way to $j, then the event happened 0 seconds ago
if ( ! isset( $chunks[ $i ] ) ) {
$output = $right_now_text;
} else {
// Set output var
$output = sprintf( translate_nooped_plural( $chunks[ $i ][1], $count, 'bbpress' ), bbp_number_format_i18n( $count ) );
// Step two: the second chunk
if ( $i + 2 < $j ) {
$seconds2 = $chunks[ $i + 1 ][0];
$count2 = floor( ( $since - ( $seconds * $count ) ) / $seconds2 );
// Add to output var
if ( 0 != $count2 ) {
$output .= _x( ',', 'Separator in time since', 'bbpress' ) . ' ';
$output .= sprintf( translate_nooped_plural( $chunks[ $i + 1 ][1], $count2, 'bbpress' ), bbp_number_format_i18n( $count2 ) );
}
}
// Empty counts, so fallback to right now
if ( empty( $count ) && empty( $count2 ) ) {
$output = $right_now_text;
}
}
}
// Append 'ago' to the end of time-since if not 'right now'
if ( $output != $right_now_text ) {
$output = sprintf( $ago_text, $output );
}
// Filter & return
return apply_filters( 'bbp_get_time_since', $output, $older_date, $newer_date );
}
/** Revisions *****************************************************************/
/**
* Formats the reason for editing the topic/reply.
*
* Does these things:
* - Trimming
* - Removing periods from the end of the string
* - Trimming again
*
* @since 2.0.0 bbPress (r2782)
*
* @param string $reason Optional. User submitted reason for editing.
* @return string Status of topic
*/
function bbp_format_revision_reason( $reason = '' ) {
$reason = (string) $reason;
// Bail if reason is empty
if ( empty( $reason ) ) {
return $reason;
}
// Trimming
$reason = trim( $reason );
// We add our own full stop.
while ( substr( $reason, -1 ) === '.' ) {
$reason = substr( $reason, 0, -1 );
}
// Trim again
$reason = trim( $reason );
return $reason;
}