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Diffstat (limited to '')
-rw-r--r-- | wp-includes/atomlib.php | 397 |
1 files changed, 397 insertions, 0 deletions
diff --git a/wp-includes/atomlib.php b/wp-includes/atomlib.php new file mode 100644 index 0000000..90f6282 --- /dev/null +++ b/wp-includes/atomlib.php @@ -0,0 +1,397 @@ +<?php +/** + * Atom Syndication Format PHP Library + * + * @package AtomLib + * @link http://code.google.com/p/phpatomlib/ + * + * @author Elias Torres <elias@torrez.us> + * @version 0.4 + * @since 2.3.0 + */ + +/** + * Structure that store common Atom Feed Properties + * + * @package AtomLib + */ +class AtomFeed { + /** + * Stores Links + * @var array + * @access public + */ + var $links = array(); + /** + * Stores Categories + * @var array + * @access public + */ + var $categories = array(); + /** + * Stores Entries + * + * @var array + * @access public + */ + var $entries = array(); +} + +/** + * Structure that store Atom Entry Properties + * + * @package AtomLib + */ +class AtomEntry { + /** + * Stores Links + * @var array + * @access public + */ + var $links = array(); + /** + * Stores Categories + * @var array + * @access public + */ + var $categories = array(); +} + +/** + * AtomLib Atom Parser API + * + * @package AtomLib + */ +class AtomParser { + + var $NS = 'http://www.w3.org/2005/Atom'; + var $ATOM_CONTENT_ELEMENTS = array('content','summary','title','subtitle','rights'); + var $ATOM_SIMPLE_ELEMENTS = array('id','updated','published','draft'); + + var $debug = false; + + var $depth = 0; + var $indent = 2; + var $in_content; + var $ns_contexts = array(); + var $ns_decls = array(); + var $content_ns_decls = array(); + var $content_ns_contexts = array(); + var $is_xhtml = false; + var $is_html = false; + var $is_text = true; + var $skipped_div = false; + + var $FILE = "php://input"; + + var $feed; + var $current; + + /** + * PHP5 constructor. + */ + function __construct() { + + $this->feed = new AtomFeed(); + $this->current = null; + $this->map_attrs_func = array( __CLASS__, 'map_attrs' ); + $this->map_xmlns_func = array( __CLASS__, 'map_xmlns' ); + } + + /** + * PHP4 constructor. + */ + public function AtomParser() { + self::__construct(); + } + + /** + * Map attributes to key="val" + * + * @param string $k Key + * @param string $v Value + * @return string + */ + public static function map_attrs($k, $v) { + return "$k=\"$v\""; + } + + /** + * Map XML namespace to string. + * + * @param indexish $p XML Namespace element index + * @param array $n Two-element array pair. [ 0 => {namespace}, 1 => {url} ] + * @return string 'xmlns="{url}"' or 'xmlns:{namespace}="{url}"' + */ + public static function map_xmlns($p, $n) { + $xd = "xmlns"; + if( 0 < strlen($n[0]) ) { + $xd .= ":{$n[0]}"; + } + return "{$xd}=\"{$n[1]}\""; + } + + function _p($msg) { + if($this->debug) { + print str_repeat(" ", $this->depth * $this->indent) . $msg ."\n"; + } + } + + function error_handler($log_level, $log_text, $error_file, $error_line) { + $this->error = $log_text; + } + + function parse() { + + set_error_handler(array(&$this, 'error_handler')); + + array_unshift($this->ns_contexts, array()); + + if ( ! function_exists( 'xml_parser_create_ns' ) ) { + trigger_error( __( "PHP's XML extension is not available. Please contact your hosting provider to enable PHP's XML extension." ) ); + return false; + } + + $parser = xml_parser_create_ns(); + xml_set_object($parser, $this); + xml_set_element_handler($parser, "start_element", "end_element"); + xml_parser_set_option($parser,XML_OPTION_CASE_FOLDING,0); + xml_parser_set_option($parser,XML_OPTION_SKIP_WHITE,0); + xml_set_character_data_handler($parser, "cdata"); + xml_set_default_handler($parser, "_default"); + xml_set_start_namespace_decl_handler($parser, "start_ns"); + xml_set_end_namespace_decl_handler($parser, "end_ns"); + + $this->content = ''; + + $ret = true; + + $fp = fopen($this->FILE, "r"); + while ($data = fread($fp, 4096)) { + if($this->debug) $this->content .= $data; + + if(!xml_parse($parser, $data, feof($fp))) { + /* translators: 1: Error message, 2: Line number. */ + trigger_error(sprintf(__('XML Error: %1$s at line %2$s')."\n", + xml_error_string(xml_get_error_code($parser)), + xml_get_current_line_number($parser))); + $ret = false; + break; + } + } + fclose($fp); + + xml_parser_free($parser); + unset($parser); + + restore_error_handler(); + + return $ret; + } + + function start_element($parser, $name, $attrs) { + + $name_parts = explode(":", $name); + $tag = array_pop($name_parts); + + switch($name) { + case $this->NS . ':feed': + $this->current = $this->feed; + break; + case $this->NS . ':entry': + $this->current = new AtomEntry(); + break; + }; + + $this->_p("start_element('$name')"); + #$this->_p(print_r($this->ns_contexts,true)); + #$this->_p('current(' . $this->current . ')'); + + array_unshift($this->ns_contexts, $this->ns_decls); + + $this->depth++; + + if(!empty($this->in_content)) { + + $this->content_ns_decls = array(); + + if($this->is_html || $this->is_text) + trigger_error("Invalid content in element found. Content must not be of type text or html if it contains markup."); + + $attrs_prefix = array(); + + // resolve prefixes for attributes + foreach($attrs as $key => $value) { + $with_prefix = $this->ns_to_prefix($key, true); + $attrs_prefix[$with_prefix[1]] = $this->xml_escape($value); + } + + $attrs_str = join(' ', array_map($this->map_attrs_func, array_keys($attrs_prefix), array_values($attrs_prefix))); + if(strlen($attrs_str) > 0) { + $attrs_str = " " . $attrs_str; + } + + $with_prefix = $this->ns_to_prefix($name); + + if(!$this->is_declared_content_ns($with_prefix[0])) { + array_push($this->content_ns_decls, $with_prefix[0]); + } + + $xmlns_str = ''; + if(count($this->content_ns_decls) > 0) { + array_unshift($this->content_ns_contexts, $this->content_ns_decls); + $xmlns_str .= join(' ', array_map($this->map_xmlns_func, array_keys($this->content_ns_contexts[0]), array_values($this->content_ns_contexts[0]))); + if(strlen($xmlns_str) > 0) { + $xmlns_str = " " . $xmlns_str; + } + } + + array_push($this->in_content, array($tag, $this->depth, "<". $with_prefix[1] ."{$xmlns_str}{$attrs_str}" . ">")); + + } else if(in_array($tag, $this->ATOM_CONTENT_ELEMENTS) || in_array($tag, $this->ATOM_SIMPLE_ELEMENTS)) { + $this->in_content = array(); + $this->is_xhtml = $attrs['type'] == 'xhtml'; + $this->is_html = $attrs['type'] == 'html' || $attrs['type'] == 'text/html'; + $this->is_text = !in_array('type',array_keys($attrs)) || $attrs['type'] == 'text'; + $type = $this->is_xhtml ? 'XHTML' : ($this->is_html ? 'HTML' : ($this->is_text ? 'TEXT' : $attrs['type'])); + + if(in_array('src',array_keys($attrs))) { + $this->current->$tag = $attrs; + } else { + array_push($this->in_content, array($tag,$this->depth, $type)); + } + } else if($tag == 'link') { + array_push($this->current->links, $attrs); + } else if($tag == 'category') { + array_push($this->current->categories, $attrs); + } + + $this->ns_decls = array(); + } + + function end_element($parser, $name) { + + $name_parts = explode(":", $name); + $tag = array_pop($name_parts); + + $ccount = count($this->in_content); + + # if we are *in* content, then let's proceed to serialize it + if(!empty($this->in_content)) { + # if we are ending the original content element + # then let's finalize the content + if($this->in_content[0][0] == $tag && + $this->in_content[0][1] == $this->depth) { + $origtype = $this->in_content[0][2]; + array_shift($this->in_content); + $newcontent = array(); + foreach($this->in_content as $c) { + if(count($c) == 3) { + array_push($newcontent, $c[2]); + } else { + if($this->is_xhtml || $this->is_text) { + array_push($newcontent, $this->xml_escape($c)); + } else { + array_push($newcontent, $c); + } + } + } + if(in_array($tag, $this->ATOM_CONTENT_ELEMENTS)) { + $this->current->$tag = array($origtype, join('',$newcontent)); + } else { + $this->current->$tag = join('',$newcontent); + } + $this->in_content = array(); + } else if($this->in_content[$ccount-1][0] == $tag && + $this->in_content[$ccount-1][1] == $this->depth) { + $this->in_content[$ccount-1][2] = substr($this->in_content[$ccount-1][2],0,-1) . "/>"; + } else { + # else, just finalize the current element's content + $endtag = $this->ns_to_prefix($name); + array_push($this->in_content, array($tag, $this->depth, "</$endtag[1]>")); + } + } + + array_shift($this->ns_contexts); + + $this->depth--; + + if($name == ($this->NS . ':entry')) { + array_push($this->feed->entries, $this->current); + $this->current = null; + } + + $this->_p("end_element('$name')"); + } + + function start_ns($parser, $prefix, $uri) { + $this->_p("starting: " . $prefix . ":" . $uri); + array_push($this->ns_decls, array($prefix,$uri)); + } + + function end_ns($parser, $prefix) { + $this->_p("ending: #" . $prefix . "#"); + } + + function cdata($parser, $data) { + $this->_p("data: #" . str_replace(array("\n"), array("\\n"), trim($data)) . "#"); + if(!empty($this->in_content)) { + array_push($this->in_content, $data); + } + } + + function _default($parser, $data) { + # when does this gets called? + } + + + function ns_to_prefix($qname, $attr=false) { + # split 'http://www.w3.org/1999/xhtml:div' into ('http','//www.w3.org/1999/xhtml','div') + $components = explode(":", $qname); + + # grab the last one (e.g 'div') + $name = array_pop($components); + + if(!empty($components)) { + # re-join back the namespace component + $ns = join(":",$components); + foreach($this->ns_contexts as $context) { + foreach($context as $mapping) { + if($mapping[1] == $ns && strlen($mapping[0]) > 0) { + return array($mapping, "$mapping[0]:$name"); + } + } + } + } + + if($attr) { + return array(null, $name); + } else { + foreach($this->ns_contexts as $context) { + foreach($context as $mapping) { + if(strlen($mapping[0]) == 0) { + return array($mapping, $name); + } + } + } + } + } + + function is_declared_content_ns($new_mapping) { + foreach($this->content_ns_contexts as $context) { + foreach($context as $mapping) { + if($new_mapping == $mapping) { + return true; + } + } + } + return false; + } + + function xml_escape($content) + { + return str_replace(array('&','"',"'",'<','>'), + array('&','"',''','<','>'), + $content ); + } +} |