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1 <?php
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2 /**
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3 * Zend Framework (http://framework.zend.com/)
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4 *
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5 * @link http://github.com/zendframework/zf2 for the canonical source repository
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6 * @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
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7 * @license http://framework.zend.com/license/new-bsd New BSD License
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8 */
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9
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10 namespace Zend\Feed\Reader\Extension\Atom;
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11
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12 use DateTime;
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13 use DOMDocument;
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14 use DOMElement;
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15 use stdClass;
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16 use Zend\Feed\Reader;
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17 use Zend\Feed\Reader\Collection;
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18 use Zend\Feed\Reader\Extension;
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19 use Zend\Feed\Uri;
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20
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21 class Entry extends Extension\AbstractEntry
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22 {
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23 /**
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24 * Get the specified author
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25 *
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26 * @param int $index
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27 * @return string|null
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28 */
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29 public function getAuthor($index = 0)
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30 {
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31 $authors = $this->getAuthors();
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32
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33 if (isset($authors[$index])) {
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34 return $authors[$index];
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35 }
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36
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37 return;
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38 }
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39
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40 /**
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41 * Get an array with feed authors
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42 *
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43 * @return Collection\Author
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44 */
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45 public function getAuthors()
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46 {
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47 if (array_key_exists('authors', $this->data)) {
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48 return $this->data['authors'];
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49 }
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50
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51 $authors = [];
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52 $list = $this->getXpath()->query($this->getXpathPrefix() . '//atom:author');
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53
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54 if (! $list->length) {
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55 /**
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56 * TODO: Limit query to feed level els only!
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57 */
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58 $list = $this->getXpath()->query('//atom:author');
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59 }
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60
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61 if ($list->length) {
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62 foreach ($list as $author) {
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63 $author = $this->getAuthorFromElement($author);
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64 if (! empty($author)) {
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65 $authors[] = $author;
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66 }
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67 }
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68 }
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69
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70 if (count($authors) == 0) {
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71 $authors = new Collection\Author();
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72 } else {
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73 $authors = new Collection\Author(
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74 Reader\Reader::arrayUnique($authors)
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75 );
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76 }
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77
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78 $this->data['authors'] = $authors;
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79 return $this->data['authors'];
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80 }
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81
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82 /**
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83 * Get the entry content
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84 *
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85 * @return string
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86 */
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87 public function getContent()
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88 {
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89 if (array_key_exists('content', $this->data)) {
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90 return $this->data['content'];
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91 }
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92
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93 $content = null;
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94
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95 $el = $this->getXpath()->query($this->getXpathPrefix() . '/atom:content');
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96 if ($el->length > 0) {
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97 $el = $el->item(0);
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98 $type = $el->getAttribute('type');
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99 switch ($type) {
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100 case '':
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101 case 'text':
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102 case 'text/plain':
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103 case 'html':
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104 case 'text/html':
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105 $content = $el->nodeValue;
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106 break;
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107 case 'xhtml':
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108 $this->getXpath()->registerNamespace('xhtml', 'http://www.w3.org/1999/xhtml');
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109 $xhtml = $this->getXpath()->query(
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110 $this->getXpathPrefix() . '/atom:content/xhtml:div'
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111 )->item(0);
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112 $d = new DOMDocument('1.0', $this->getEncoding());
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113 $deep = version_compare(PHP_VERSION, '7', 'ge') ? 1 : true;
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114 $xhtmls = $d->importNode($xhtml, $deep);
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115 $d->appendChild($xhtmls);
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116 $content = $this->collectXhtml(
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117 $d->saveXML(),
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118 $d->lookupPrefix('http://www.w3.org/1999/xhtml')
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119 );
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120 break;
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121 }
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122 }
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123
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124 if (! $content) {
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125 $content = $this->getDescription();
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126 }
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127
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128 $this->data['content'] = trim($content);
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129
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130 return $this->data['content'];
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131 }
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132
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133 /**
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134 * Parse out XHTML to remove the namespacing
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135 *
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136 * @param $xhtml
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137 * @param $prefix
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138 * @return mixed
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139 */
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140 protected function collectXhtml($xhtml, $prefix)
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141 {
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142 if (! empty($prefix)) {
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143 $prefix = $prefix . ':';
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144 }
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145 $matches = [
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146 "/<\?xml[^<]*>[^<]*<" . $prefix . "div[^<]*/",
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147 "/<\/" . $prefix . "div>\s*$/"
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148 ];
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149 $xhtml = preg_replace($matches, '', $xhtml);
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150 if (! empty($prefix)) {
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151 $xhtml = preg_replace("/(<[\/]?)" . $prefix . "([a-zA-Z]+)/", '$1$2', $xhtml);
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152 }
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153 return $xhtml;
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154 }
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155
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156 /**
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157 * Get the entry creation date
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158 *
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159 * @return string
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160 */
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161 public function getDateCreated()
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162 {
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163 if (array_key_exists('datecreated', $this->data)) {
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164 return $this->data['datecreated'];
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165 }
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166
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167 $date = null;
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168
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169 if ($this->getAtomType() === Reader\Reader::TYPE_ATOM_03) {
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170 $dateCreated = $this->getXpath()->evaluate('string(' . $this->getXpathPrefix() . '/atom:created)');
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171 } else {
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172 $dateCreated = $this->getXpath()->evaluate('string(' . $this->getXpathPrefix() . '/atom:published)');
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173 }
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174
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175 if ($dateCreated) {
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176 $date = new DateTime($dateCreated);
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177 }
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178
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179 $this->data['datecreated'] = $date;
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180
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181 return $this->data['datecreated'];
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182 }
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183
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184 /**
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185 * Get the entry modification date
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186 *
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187 * @return string
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188 */
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189 public function getDateModified()
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190 {
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191 if (array_key_exists('datemodified', $this->data)) {
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192 return $this->data['datemodified'];
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193 }
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194
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195 $date = null;
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196
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197 if ($this->getAtomType() === Reader\Reader::TYPE_ATOM_03) {
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198 $dateModified = $this->getXpath()->evaluate('string(' . $this->getXpathPrefix() . '/atom:modified)');
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199 } else {
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200 $dateModified = $this->getXpath()->evaluate('string(' . $this->getXpathPrefix() . '/atom:updated)');
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201 }
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202
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203 if ($dateModified) {
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204 $date = new DateTime($dateModified);
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205 }
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206
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207 $this->data['datemodified'] = $date;
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208
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209 return $this->data['datemodified'];
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210 }
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211
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212 /**
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213 * Get the entry description
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214 *
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215 * @return string
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216 */
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217 public function getDescription()
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218 {
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219 if (array_key_exists('description', $this->data)) {
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220 return $this->data['description'];
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221 }
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222
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223 $description = $this->getXpath()->evaluate('string(' . $this->getXpathPrefix() . '/atom:summary)');
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224
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225 if (! $description) {
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226 $description = null;
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227 }
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228
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229 $this->data['description'] = $description;
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230
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231 return $this->data['description'];
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232 }
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233
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234 /**
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235 * Get the entry enclosure
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236 *
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237 * @return string
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238 */
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239 public function getEnclosure()
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240 {
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241 if (array_key_exists('enclosure', $this->data)) {
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242 return $this->data['enclosure'];
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243 }
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244
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245 $enclosure = null;
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246
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247 $nodeList = $this->getXpath()->query($this->getXpathPrefix() . '/atom:link[@rel="enclosure"]');
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248
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249 if ($nodeList->length > 0) {
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250 $enclosure = new stdClass();
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251 $enclosure->url = $nodeList->item(0)->getAttribute('href');
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252 $enclosure->length = $nodeList->item(0)->getAttribute('length');
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253 $enclosure->type = $nodeList->item(0)->getAttribute('type');
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254 }
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255
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256 $this->data['enclosure'] = $enclosure;
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257
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258 return $this->data['enclosure'];
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259 }
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260
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261 /**
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262 * Get the entry ID
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263 *
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264 * @return string
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265 */
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266 public function getId()
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267 {
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268 if (array_key_exists('id', $this->data)) {
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269 return $this->data['id'];
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270 }
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271
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272 $id = $this->getXpath()->evaluate('string(' . $this->getXpathPrefix() . '/atom:id)');
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273
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274 if (! $id) {
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275 if ($this->getPermalink()) {
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276 $id = $this->getPermalink();
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277 } elseif ($this->getTitle()) {
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278 $id = $this->getTitle();
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279 } else {
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280 $id = null;
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281 }
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282 }
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283
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284 $this->data['id'] = $id;
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285
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286 return $this->data['id'];
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287 }
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288
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289 /**
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290 * Get the base URI of the feed (if set).
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291 *
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292 * @return string|null
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293 */
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294 public function getBaseUrl()
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295 {
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296 if (array_key_exists('baseUrl', $this->data)) {
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297 return $this->data['baseUrl'];
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298 }
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299
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300 $baseUrl = $this->getXpath()->evaluate(
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301 'string('
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302 . $this->getXpathPrefix()
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303 . '/@xml:base[1]'
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304 . ')'
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305 );
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306
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307 if (! $baseUrl) {
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308 $baseUrl = $this->getXpath()->evaluate('string(//@xml:base[1])');
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309 }
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310
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311 if (! $baseUrl) {
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312 $baseUrl = null;
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313 }
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314
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315 $this->data['baseUrl'] = $baseUrl;
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316
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317 return $this->data['baseUrl'];
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318 }
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319
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320 /**
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321 * Get a specific link
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322 *
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323 * @param int $index
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324 * @return string
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325 */
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326 public function getLink($index = 0)
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327 {
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328 if (! array_key_exists('links', $this->data)) {
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329 $this->getLinks();
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330 }
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331
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332 if (isset($this->data['links'][$index])) {
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333 return $this->data['links'][$index];
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334 }
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335
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336 return;
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337 }
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338
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339 /**
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340 * Get all links
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341 *
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342 * @return array
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343 */
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344 public function getLinks()
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345 {
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346 if (array_key_exists('links', $this->data)) {
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347 return $this->data['links'];
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348 }
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349
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350 $links = [];
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351
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352 $list = $this->getXpath()->query(
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353 $this->getXpathPrefix() . '//atom:link[@rel="alternate"]/@href' . '|' .
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354 $this->getXpathPrefix() . '//atom:link[not(@rel)]/@href'
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355 );
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356
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357 if ($list->length) {
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358 foreach ($list as $link) {
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359 $links[] = $this->absolutiseUri($link->value);
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360 }
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361 }
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362
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363 $this->data['links'] = $links;
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364
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365 return $this->data['links'];
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366 }
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367
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368 /**
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369 * Get a permalink to the entry
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370 *
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371 * @return string
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372 */
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373 public function getPermalink()
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374 {
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375 return $this->getLink(0);
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376 }
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377
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378 /**
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379 * Get the entry title
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380 *
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381 * @return string
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382 */
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383 public function getTitle()
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384 {
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385 if (array_key_exists('title', $this->data)) {
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386 return $this->data['title'];
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387 }
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388
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389 $title = $this->getXpath()->evaluate('string(' . $this->getXpathPrefix() . '/atom:title)');
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390
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391 if (! $title) {
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392 $title = null;
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393 }
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394
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395 $this->data['title'] = $title;
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396
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397 return $this->data['title'];
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398 }
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399
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400 /**
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401 * Get the number of comments/replies for current entry
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402 *
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403 * @return int
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404 */
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405 public function getCommentCount()
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406 {
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407 if (array_key_exists('commentcount', $this->data)) {
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408 return $this->data['commentcount'];
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409 }
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410
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411 $count = null;
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412
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413 $this->getXpath()->registerNamespace('thread10', 'http://purl.org/syndication/thread/1.0');
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414 $list = $this->getXpath()->query(
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415 $this->getXpathPrefix() . '//atom:link[@rel="replies"]/@thread10:count'
|
Chris@0
|
416 );
|
Chris@0
|
417
|
Chris@0
|
418 if ($list->length) {
|
Chris@0
|
419 $count = $list->item(0)->value;
|
Chris@0
|
420 }
|
Chris@0
|
421
|
Chris@0
|
422 $this->data['commentcount'] = $count;
|
Chris@0
|
423
|
Chris@0
|
424 return $this->data['commentcount'];
|
Chris@0
|
425 }
|
Chris@0
|
426
|
Chris@0
|
427 /**
|
Chris@0
|
428 * Returns a URI pointing to the HTML page where comments can be made on this entry
|
Chris@0
|
429 *
|
Chris@0
|
430 * @return string
|
Chris@0
|
431 */
|
Chris@0
|
432 public function getCommentLink()
|
Chris@0
|
433 {
|
Chris@0
|
434 if (array_key_exists('commentlink', $this->data)) {
|
Chris@0
|
435 return $this->data['commentlink'];
|
Chris@0
|
436 }
|
Chris@0
|
437
|
Chris@0
|
438 $link = null;
|
Chris@0
|
439
|
Chris@0
|
440 $list = $this->getXpath()->query(
|
Chris@0
|
441 $this->getXpathPrefix() . '//atom:link[@rel="replies" and @type="text/html"]/@href'
|
Chris@0
|
442 );
|
Chris@0
|
443
|
Chris@0
|
444 if ($list->length) {
|
Chris@0
|
445 $link = $list->item(0)->value;
|
Chris@0
|
446 $link = $this->absolutiseUri($link);
|
Chris@0
|
447 }
|
Chris@0
|
448
|
Chris@0
|
449 $this->data['commentlink'] = $link;
|
Chris@0
|
450
|
Chris@0
|
451 return $this->data['commentlink'];
|
Chris@0
|
452 }
|
Chris@0
|
453
|
Chris@0
|
454 /**
|
Chris@0
|
455 * Returns a URI pointing to a feed of all comments for this entry
|
Chris@0
|
456 *
|
Chris@0
|
457 * @param string $type
|
Chris@0
|
458 * @return string
|
Chris@0
|
459 */
|
Chris@0
|
460 public function getCommentFeedLink($type = 'atom')
|
Chris@0
|
461 {
|
Chris@0
|
462 if (array_key_exists('commentfeedlink', $this->data)) {
|
Chris@0
|
463 return $this->data['commentfeedlink'];
|
Chris@0
|
464 }
|
Chris@0
|
465
|
Chris@0
|
466 $link = null;
|
Chris@0
|
467
|
Chris@0
|
468 $list = $this->getXpath()->query(
|
Chris@0
|
469 $this->getXpathPrefix() . '//atom:link[@rel="replies" and @type="application/' . $type.'+xml"]/@href'
|
Chris@0
|
470 );
|
Chris@0
|
471
|
Chris@0
|
472 if ($list->length) {
|
Chris@0
|
473 $link = $list->item(0)->value;
|
Chris@0
|
474 $link = $this->absolutiseUri($link);
|
Chris@0
|
475 }
|
Chris@0
|
476
|
Chris@0
|
477 $this->data['commentfeedlink'] = $link;
|
Chris@0
|
478
|
Chris@0
|
479 return $this->data['commentfeedlink'];
|
Chris@0
|
480 }
|
Chris@0
|
481
|
Chris@0
|
482 /**
|
Chris@0
|
483 * Get all categories
|
Chris@0
|
484 *
|
Chris@0
|
485 * @return Collection\Category
|
Chris@0
|
486 */
|
Chris@0
|
487 public function getCategories()
|
Chris@0
|
488 {
|
Chris@0
|
489 if (array_key_exists('categories', $this->data)) {
|
Chris@0
|
490 return $this->data['categories'];
|
Chris@0
|
491 }
|
Chris@0
|
492
|
Chris@0
|
493 if ($this->getAtomType() == Reader\Reader::TYPE_ATOM_10) {
|
Chris@0
|
494 $list = $this->getXpath()->query($this->getXpathPrefix() . '//atom:category');
|
Chris@0
|
495 } else {
|
Chris@0
|
496 /**
|
Chris@0
|
497 * Since Atom 0.3 did not support categories, it would have used the
|
Chris@0
|
498 * Dublin Core extension. However there is a small possibility Atom 0.3
|
Chris@0
|
499 * may have been retrofitted to use Atom 1.0 instead.
|
Chris@0
|
500 */
|
Chris@0
|
501 $this->getXpath()->registerNamespace('atom10', Reader\Reader::NAMESPACE_ATOM_10);
|
Chris@0
|
502 $list = $this->getXpath()->query($this->getXpathPrefix() . '//atom10:category');
|
Chris@0
|
503 }
|
Chris@0
|
504
|
Chris@0
|
505 if ($list->length) {
|
Chris@0
|
506 $categoryCollection = new Collection\Category;
|
Chris@0
|
507 foreach ($list as $category) {
|
Chris@0
|
508 $categoryCollection[] = [
|
Chris@0
|
509 'term' => $category->getAttribute('term'),
|
Chris@0
|
510 'scheme' => $category->getAttribute('scheme'),
|
Chris@0
|
511 'label' => $category->getAttribute('label')
|
Chris@0
|
512 ];
|
Chris@0
|
513 }
|
Chris@0
|
514 } else {
|
Chris@0
|
515 return new Collection\Category;
|
Chris@0
|
516 }
|
Chris@0
|
517
|
Chris@0
|
518 $this->data['categories'] = $categoryCollection;
|
Chris@0
|
519
|
Chris@0
|
520 return $this->data['categories'];
|
Chris@0
|
521 }
|
Chris@0
|
522
|
Chris@0
|
523 /**
|
Chris@0
|
524 * Get source feed metadata from the entry
|
Chris@0
|
525 *
|
Chris@0
|
526 * @return Reader\Feed\Atom\Source|null
|
Chris@0
|
527 */
|
Chris@0
|
528 public function getSource()
|
Chris@0
|
529 {
|
Chris@0
|
530 if (array_key_exists('source', $this->data)) {
|
Chris@0
|
531 return $this->data['source'];
|
Chris@0
|
532 }
|
Chris@0
|
533
|
Chris@0
|
534 $source = null;
|
Chris@0
|
535 // TODO: Investigate why _getAtomType() fails here. Is it even needed?
|
Chris@0
|
536 if ($this->getType() == Reader\Reader::TYPE_ATOM_10) {
|
Chris@0
|
537 $list = $this->getXpath()->query($this->getXpathPrefix() . '/atom:source[1]');
|
Chris@0
|
538 if ($list->length) {
|
Chris@0
|
539 $element = $list->item(0);
|
Chris@0
|
540 $source = new Reader\Feed\Atom\Source($element, $this->getXpathPrefix());
|
Chris@0
|
541 }
|
Chris@0
|
542 }
|
Chris@0
|
543
|
Chris@0
|
544 $this->data['source'] = $source;
|
Chris@0
|
545 return $this->data['source'];
|
Chris@0
|
546 }
|
Chris@0
|
547
|
Chris@0
|
548 /**
|
Chris@0
|
549 * Attempt to absolutise the URI, i.e. if a relative URI apply the
|
Chris@0
|
550 * xml:base value as a prefix to turn into an absolute URI.
|
Chris@0
|
551 *
|
Chris@0
|
552 * @param $link
|
Chris@0
|
553 * @return string
|
Chris@0
|
554 */
|
Chris@0
|
555 protected function absolutiseUri($link)
|
Chris@0
|
556 {
|
Chris@12
|
557 if (! Uri::factory($link)->isAbsolute()) {
|
Chris@0
|
558 if ($this->getBaseUrl() !== null) {
|
Chris@0
|
559 $link = $this->getBaseUrl() . $link;
|
Chris@12
|
560 if (! Uri::factory($link)->isValid()) {
|
Chris@0
|
561 $link = null;
|
Chris@0
|
562 }
|
Chris@0
|
563 }
|
Chris@0
|
564 }
|
Chris@0
|
565 return $link;
|
Chris@0
|
566 }
|
Chris@0
|
567
|
Chris@0
|
568 /**
|
Chris@0
|
569 * Get an author entry
|
Chris@0
|
570 *
|
Chris@0
|
571 * @param DOMElement $element
|
Chris@0
|
572 * @return string
|
Chris@0
|
573 */
|
Chris@0
|
574 protected function getAuthorFromElement(DOMElement $element)
|
Chris@0
|
575 {
|
Chris@0
|
576 $author = [];
|
Chris@0
|
577
|
Chris@0
|
578 $emailNode = $element->getElementsByTagName('email');
|
Chris@0
|
579 $nameNode = $element->getElementsByTagName('name');
|
Chris@0
|
580 $uriNode = $element->getElementsByTagName('uri');
|
Chris@0
|
581
|
Chris@0
|
582 if ($emailNode->length && strlen($emailNode->item(0)->nodeValue) > 0) {
|
Chris@0
|
583 $author['email'] = $emailNode->item(0)->nodeValue;
|
Chris@0
|
584 }
|
Chris@0
|
585
|
Chris@0
|
586 if ($nameNode->length && strlen($nameNode->item(0)->nodeValue) > 0) {
|
Chris@0
|
587 $author['name'] = $nameNode->item(0)->nodeValue;
|
Chris@0
|
588 }
|
Chris@0
|
589
|
Chris@0
|
590 if ($uriNode->length && strlen($uriNode->item(0)->nodeValue) > 0) {
|
Chris@0
|
591 $author['uri'] = $uriNode->item(0)->nodeValue;
|
Chris@0
|
592 }
|
Chris@0
|
593
|
Chris@0
|
594 if (empty($author)) {
|
Chris@0
|
595 return;
|
Chris@0
|
596 }
|
Chris@0
|
597 return $author;
|
Chris@0
|
598 }
|
Chris@0
|
599
|
Chris@0
|
600 /**
|
Chris@0
|
601 * Register the default namespaces for the current feed format
|
Chris@0
|
602 */
|
Chris@0
|
603 protected function registerNamespaces()
|
Chris@0
|
604 {
|
Chris@0
|
605 switch ($this->getAtomType()) {
|
Chris@0
|
606 case Reader\Reader::TYPE_ATOM_03:
|
Chris@0
|
607 $this->getXpath()->registerNamespace('atom', Reader\Reader::NAMESPACE_ATOM_03);
|
Chris@0
|
608 break;
|
Chris@0
|
609 default:
|
Chris@0
|
610 $this->getXpath()->registerNamespace('atom', Reader\Reader::NAMESPACE_ATOM_10);
|
Chris@0
|
611 break;
|
Chris@0
|
612 }
|
Chris@0
|
613 }
|
Chris@0
|
614
|
Chris@0
|
615 /**
|
Chris@0
|
616 * Detect the presence of any Atom namespaces in use
|
Chris@0
|
617 *
|
Chris@0
|
618 * @return string
|
Chris@0
|
619 */
|
Chris@0
|
620 protected function getAtomType()
|
Chris@0
|
621 {
|
Chris@0
|
622 $dom = $this->getDomDocument();
|
Chris@0
|
623 $prefixAtom03 = $dom->lookupPrefix(Reader\Reader::NAMESPACE_ATOM_03);
|
Chris@0
|
624 $prefixAtom10 = $dom->lookupPrefix(Reader\Reader::NAMESPACE_ATOM_10);
|
Chris@0
|
625 if ($dom->isDefaultNamespace(Reader\Reader::NAMESPACE_ATOM_03)
|
Chris@12
|
626 || ! empty($prefixAtom03)) {
|
Chris@0
|
627 return Reader\Reader::TYPE_ATOM_03;
|
Chris@0
|
628 }
|
Chris@0
|
629 if ($dom->isDefaultNamespace(Reader\Reader::NAMESPACE_ATOM_10)
|
Chris@12
|
630 || ! empty($prefixAtom10)) {
|
Chris@0
|
631 return Reader\Reader::TYPE_ATOM_10;
|
Chris@0
|
632 }
|
Chris@0
|
633 }
|
Chris@0
|
634 }
|