| 1 | <?php
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| 2 | /*
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| 3 | * atomlib.php - Atom Syndication Format PHP Library
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| 4 | *
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| 5 | * Project: http://code.google.com/p/phpatomlib/
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| 6 | *
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| 7 | * Author: Elias Torres <elias@torrez.us>
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| 8 | * Version: 0.4
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| 9 | *
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| 10 | */
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| 11 |
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| 12 | class AtomFeed {
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| 13 | var $links = array();
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| 14 | var $categories = array();
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| 15 |
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| 16 | var $entries = array();
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| 17 | }
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| 18 |
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| 19 | class AtomEntry {
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| 20 | var $links = array();
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| 21 | var $categories = array();
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| 22 | }
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| 23 |
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| 24 | class AtomParser {
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| 25 |
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| 26 | var $NS = 'http://www.w3.org/2005/Atom';
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| 27 | var $ATOM_CONTENT_ELEMENTS = array('content','summary','title','subtitle','rights');
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| 28 | var $ATOM_SIMPLE_ELEMENTS = array('id','updated','published','draft');
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| 29 |
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| 30 | var $debug = false;
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| 31 |
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| 32 | var $depth = 0;
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| 33 | var $indent = 2;
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| 34 | var $in_content;
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| 35 | var $ns_contexts = array();
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| 36 | var $ns_decls = array();
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| 37 | var $content_ns_decls = array();
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| 38 | var $content_ns_contexts = array();
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| 39 | var $is_xhtml = false;
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| 40 | var $is_html = false;
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| 41 | var $is_text = true;
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| 42 | var $skipped_div = false;
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| 43 |
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| 44 | var $FILE = "php://input";
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| 45 |
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| 46 | var $feed;
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| 47 | var $current;
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| 48 |
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| 49 | function AtomParser() {
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| 50 |
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| 51 | $this->feed = new AtomFeed();
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| 52 | $this->current = null;
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| 53 | $this->map_attrs_func = create_function('$k,$v', 'return "$k=\"$v\"";');
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| 54 | $this->map_xmlns_func = create_function('$p,$n', '$xd = "xmlns"; if(strlen($n[0])>0) $xd .= ":{$n[0]}"; return "{$xd}=\"{$n[1]}\"";');
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| 55 | }
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| 56 |
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| 57 | function _p($msg) {
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| 58 | if($this->debug) {
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| 59 | print str_repeat(" ", $this->depth * $this->indent) . $msg ."\n";
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| 60 | }
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| 61 | }
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| 62 |
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| 63 | function error_handler($log_level, $log_text, $error_file, $error_line) {
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| 64 | $this->error = $log_text;
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| 65 | }
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| 66 |
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| 67 | function parse() {
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| 68 |
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| 69 | set_error_handler(array(&$this, 'error_handler'));
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| 70 |
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| 71 | array_unshift($this->ns_contexts, array());
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| 72 |
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| 73 | $parser = xml_parser_create_ns();
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| 74 | xml_set_object($parser, $this);
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| 75 | xml_set_element_handler($parser, "start_element", "end_element");
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| 76 | xml_parser_set_option($parser,XML_OPTION_CASE_FOLDING,0);
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| 77 | xml_parser_set_option($parser,XML_OPTION_SKIP_WHITE,0);
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| 78 | xml_set_character_data_handler($parser, "cdata");
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| 79 | xml_set_default_handler($parser, "_default");
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| 80 | xml_set_start_namespace_decl_handler($parser, "start_ns");
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| 81 | xml_set_end_namespace_decl_handler($parser, "end_ns");
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| 82 |
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| 83 | $this->content = '';
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| 84 |
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| 85 | $ret = true;
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| 86 |
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| 87 | $fp = fopen($this->FILE, "r");
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| 88 | while ($data = fread($fp, 4096)) {
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| 89 | if($this->debug) $this->content .= $data;
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| 90 |
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| 91 | if(!xml_parse($parser, $data, feof($fp))) {
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| 92 | trigger_error(sprintf(__('XML error: %s at line %d')."\n",
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| 93 | xml_error_string(xml_get_error_code($xml_parser)),
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| 94 | xml_get_current_line_number($xml_parser)));
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| 95 | $ret = false;
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| 96 | break;
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| 97 | }
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| 98 | }
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| 99 | fclose($fp);
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| 100 |
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| 101 | xml_parser_free($parser);
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| 102 |
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| 103 | restore_error_handler();
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| 104 |
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| 105 | return $ret;
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| 106 | }
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| 107 |
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| 108 | function start_element($parser, $name, $attrs) {
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| 109 |
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| 110 | $tag = array_pop(split(":", $name));
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| 111 |
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| 112 | switch($name) {
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| 113 | case $this->NS . ':feed':
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| 114 | $this->current = $this->feed;
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| 115 | break;
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| 116 | case $this->NS . ':entry':
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| 117 | $this->current = new AtomEntry();
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| 118 | break;
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| 119 | };
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| 120 |
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| 121 | $this->_p("start_element('$name')");
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| 122 | #$this->_p(print_r($this->ns_contexts,true));
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| 123 | #$this->_p('current(' . $this->current . ')');
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| 124 |
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| 125 | array_unshift($this->ns_contexts, $this->ns_decls);
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| 126 |
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| 127 | $this->depth++;
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| 128 |
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| 129 | if(!empty($this->in_content)) {
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| 130 |
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| 131 | $this->content_ns_decls = array();
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| 132 |
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| 133 | if($this->is_html || $this->is_text)
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| 134 | trigger_error("Invalid content in element found. Content must not be of type text or html if it contains markup.");
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| 135 |
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| 136 | $attrs_prefix = array();
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| 137 |
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| 138 | // resolve prefixes for attributes
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| 139 | foreach($attrs as $key => $value) {
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| 140 | $with_prefix = $this->ns_to_prefix($key, true);
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| 141 | $attrs_prefix[$with_prefix[1]] = $this->xml_escape($value);
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| 142 | }
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| 143 |
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| 144 | $attrs_str = join(' ', array_map($this->map_attrs_func, array_keys($attrs_prefix), array_values($attrs_prefix)));
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| 145 | if(strlen($attrs_str) > 0) {
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| 146 | $attrs_str = " " . $attrs_str;
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| 147 | }
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| 148 |
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| 149 | $with_prefix = $this->ns_to_prefix($name);
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| 150 |
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| 151 | if(!$this->is_declared_content_ns($with_prefix[0])) {
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| 152 | array_push($this->content_ns_decls, $with_prefix[0]);
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| 153 | }
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| 154 |
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| 155 | $xmlns_str = '';
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| 156 | if(count($this->content_ns_decls) > 0) {
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| 157 | array_unshift($this->content_ns_contexts, $this->content_ns_decls);
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| 158 | $xmlns_str .= join(' ', array_map($this->map_xmlns_func, array_keys($this->content_ns_contexts[0]), array_values($this->content_ns_contexts[0])));
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| 159 | if(strlen($xmlns_str) > 0) {
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| 160 | $xmlns_str = " " . $xmlns_str;
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| 161 | }
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| 162 | }
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| 163 |
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| 164 | array_push($this->in_content, array($tag, $this->depth, "<". $with_prefix[1] ."{$xmlns_str}{$attrs_str}" . ">"));
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| 165 |
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| 166 | } else if(in_array($tag, $this->ATOM_CONTENT_ELEMENTS) || in_array($tag, $this->ATOM_SIMPLE_ELEMENTS)) {
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| 167 | $this->in_content = array();
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| 168 | $this->is_xhtml = $attrs['type'] == 'xhtml';
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| 169 | $this->is_html = $attrs['type'] == 'html' || $attrs['type'] == 'text/html';
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| 170 | $this->is_text = !in_array('type',array_keys($attrs)) || $attrs['type'] == 'text';
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| 171 | $type = $this->is_xhtml ? 'XHTML' : ($this->is_html ? 'HTML' : ($this->is_text ? 'TEXT' : $attrs['type']));
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| 172 |
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| 173 | if(in_array('src',array_keys($attrs))) {
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| 174 | $this->current->$tag = $attrs;
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| 175 | } else {
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| 176 | array_push($this->in_content, array($tag,$this->depth, $type));
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| 177 | }
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| 178 | } else if($tag == 'link') {
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| 179 | array_push($this->current->links, $attrs);
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| 180 | } else if($tag == 'category') {
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| 181 | array_push($this->current->categories, $attrs);
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| 182 | }
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| 183 |
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| 184 | $this->ns_decls = array();
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| 185 | }
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| 186 |
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| 187 | function end_element($parser, $name) {
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| 188 |
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| 189 | $tag = array_pop(split(":", $name));
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| 190 |
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| 191 | $ccount = count($this->in_content);
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| 192 |
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| 193 | # if we are *in* content, then let's proceed to serialize it
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| 194 | if(!empty($this->in_content)) {
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| 195 | # if we are ending the original content element
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| 196 | # then let's finalize the content
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| 197 | if($this->in_content[0][0] == $tag &&
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| 198 | $this->in_content[0][1] == $this->depth) {
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| 199 | $origtype = $this->in_content[0][2];
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| 200 | array_shift($this->in_content);
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| 201 | $newcontent = array();
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| 202 | foreach($this->in_content as $c) {
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| 203 | if(count($c) == 3) {
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| 204 | array_push($newcontent, $c[2]);
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| 205 | } else {
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| 206 | if($this->is_xhtml) {
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| 207 | array_push($newcontent, $this->xml_escape($c));
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| 208 | } else {
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| 209 | array_push($newcontent, $c);
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| 210 | }
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| 211 | }
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| 212 | }
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| 213 | if(in_array($tag, $this->ATOM_CONTENT_ELEMENTS)) {
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| 214 | $this->current->$tag = array($origtype, join('',$newcontent));
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| 215 | } else {
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| 216 | $this->current->$tag = join('',$newcontent);
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| 217 | }
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| 218 | $this->in_content = array();
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| 219 | } else if($this->in_content[$ccount-1][0] == $tag &&
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| 220 | $this->in_content[$ccount-1][1] == $this->depth) {
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| 221 | $this->in_content[$ccount-1][2] = substr($this->in_content[$ccount-1][2],0,-1) . "/>";
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| 222 | } else {
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| 223 | # else, just finalize the current element's content
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| 224 | $endtag = $this->ns_to_prefix($name);
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| 225 | array_push($this->in_content, array($tag, $this->depth, "</$endtag[1]>"));
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| 226 | }
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| 227 | }
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| 228 |
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| 229 | array_shift($this->ns_contexts);
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| 230 |
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| 231 | $this->depth--;
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| 232 |
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| 233 | if($name == ($this->NS . ':entry')) {
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| 234 | array_push($this->feed->entries, $this->current);
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| 235 | $this->current = null;
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| 236 | }
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| 237 |
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| 238 | $this->_p("end_element('$name')");
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| 239 | }
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| 240 |
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| 241 | function start_ns($parser, $prefix, $uri) {
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| 242 | $this->_p("starting: " . $prefix . ":" . $uri);
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| 243 | array_push($this->ns_decls, array($prefix,$uri));
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| 244 | }
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| 245 |
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| 246 | function end_ns($parser, $prefix) {
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| 247 | $this->_p("ending: #" . $prefix . "#");
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| 248 | }
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| 249 |
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| 250 | function cdata($parser, $data) {
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| 251 | $this->_p("data: #" . str_replace(array("\n"), array("\\n"), trim($data)) . "#");
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| 252 | if(!empty($this->in_content)) {
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| 253 | array_push($this->in_content, $data);
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| 254 | }
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| 255 | }
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| 256 |
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| 257 | function _default($parser, $data) {
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| 258 | # when does this gets called?
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| 259 | }
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| 260 |
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| 261 |
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| 262 | function ns_to_prefix($qname, $attr=false) {
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| 263 | # split 'http://www.w3.org/1999/xhtml:div' into ('http','//www.w3.org/1999/xhtml','div')
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| 264 | $components = split(":", $qname);
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| 265 |
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| 266 | # grab the last one (e.g 'div')
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| 267 | $name = array_pop($components);
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| 268 |
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| 269 | if(!empty($components)) {
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| 270 | # re-join back the namespace component
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| 271 | $ns = join(":",$components);
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| 272 | foreach($this->ns_contexts as $context) {
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| 273 | foreach($context as $mapping) {
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| 274 | if($mapping[1] == $ns && strlen($mapping[0]) > 0) {
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| 275 | return array($mapping, "$mapping[0]:$name");
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| 276 | }
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| 277 | }
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| 278 | }
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| 279 | }
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| 280 |
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| 281 | if($attr) {
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| 282 | return array(null, $name);
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| 283 | } else {
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| 284 | foreach($this->ns_contexts as $context) {
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| 285 | foreach($context as $mapping) {
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| 286 | if(strlen($mapping[0]) == 0) {
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| 287 | return array($mapping, $name);
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| 288 | }
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| 289 | }
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| 290 | }
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| 291 | }
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| 292 | }
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| 293 |
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| 294 | function is_declared_content_ns($new_mapping) {
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| 295 | foreach($this->content_ns_contexts as $context) {
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| 296 | foreach($context as $mapping) {
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| 297 | if($new_mapping == $mapping) {
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| 298 | return true;
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| 299 | }
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| 300 | }
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| 301 | }
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| 302 | return false;
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| 303 | }
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| 304 |
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| 305 | function xml_escape($string)
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| 306 | {
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| 307 | return str_replace(array('&','"',"'",'<','>'),
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| 308 | array('&','"',''','<','>'),
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| 309 | $string );
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| 310 | }
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| 311 | }
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| 312 |
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| 313 | ?>
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![(please configure the [header_logo] section in trac.ini)](/chrome/site/your_project_logo.png){kind=logo}
