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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 DOMElement;
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14 use Zend\Feed\Reader;
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15 use Zend\Feed\Reader\Collection;
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16 use Zend\Feed\Reader\Extension;
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17 use Zend\Feed\Uri;
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18
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19 class Feed extends Extension\AbstractFeed
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20 {
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21 /**
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22 * Get a single author
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23 *
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24 * @param int $index
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25 * @return string|null
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26 */
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27 public function getAuthor($index = 0)
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28 {
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29 $authors = $this->getAuthors();
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30
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31 if (isset($authors[$index])) {
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32 return $authors[$index];
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33 }
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34
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35 return;
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36 }
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37
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38 /**
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39 * Get an array with feed authors
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40 *
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41 * @return Collection\Author
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42 */
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43 public function getAuthors()
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44 {
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45 if (array_key_exists('authors', $this->data)) {
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46 return $this->data['authors'];
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47 }
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48
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49 $list = $this->xpath->query('//atom:author');
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50
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51 $authors = [];
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52
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53 if ($list->length) {
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54 foreach ($list as $author) {
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55 $author = $this->getAuthorFromElement($author);
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56 if (! empty($author)) {
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57 $authors[] = $author;
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58 }
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59 }
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60 }
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61
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62 if (count($authors) == 0) {
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63 $authors = new Collection\Author();
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64 } else {
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65 $authors = new Collection\Author(
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66 Reader\Reader::arrayUnique($authors)
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67 );
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68 }
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69
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70 $this->data['authors'] = $authors;
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71
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72 return $this->data['authors'];
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73 }
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74
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75 /**
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76 * Get the copyright entry
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77 *
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78 * @return string|null
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79 */
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80 public function getCopyright()
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81 {
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82 if (array_key_exists('copyright', $this->data)) {
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83 return $this->data['copyright'];
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84 }
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85
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86 $copyright = null;
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87
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88 if ($this->getType() === Reader\Reader::TYPE_ATOM_03) {
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89 $copyright = $this->xpath->evaluate('string(' . $this->getXpathPrefix() . '/atom:copyright)');
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90 } else {
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91 $copyright = $this->xpath->evaluate('string(' . $this->getXpathPrefix() . '/atom:rights)');
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92 }
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93
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94 if (! $copyright) {
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95 $copyright = null;
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96 }
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97
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98 $this->data['copyright'] = $copyright;
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99
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100 return $this->data['copyright'];
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101 }
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102
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103 /**
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104 * Get the feed creation date
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105 *
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106 * @return DateTime|null
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107 */
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108 public function getDateCreated()
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109 {
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110 if (array_key_exists('datecreated', $this->data)) {
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111 return $this->data['datecreated'];
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112 }
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113
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114 $date = null;
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115
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116 if ($this->getType() === Reader\Reader::TYPE_ATOM_03) {
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117 $dateCreated = $this->xpath->evaluate('string(' . $this->getXpathPrefix() . '/atom:created)');
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118 } else {
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119 $dateCreated = $this->xpath->evaluate('string(' . $this->getXpathPrefix() . '/atom:published)');
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120 }
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121
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122 if ($dateCreated) {
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123 $date = new DateTime($dateCreated);
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124 }
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125
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126 $this->data['datecreated'] = $date;
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127
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128 return $this->data['datecreated'];
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129 }
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130
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131 /**
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132 * Get the feed modification date
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133 *
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134 * @return DateTime|null
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135 */
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136 public function getDateModified()
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137 {
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138 if (array_key_exists('datemodified', $this->data)) {
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139 return $this->data['datemodified'];
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140 }
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141
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142 $date = null;
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143
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144 if ($this->getType() === Reader\Reader::TYPE_ATOM_03) {
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145 $dateModified = $this->xpath->evaluate('string(' . $this->getXpathPrefix() . '/atom:modified)');
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146 } else {
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147 $dateModified = $this->xpath->evaluate('string(' . $this->getXpathPrefix() . '/atom:updated)');
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148 }
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149
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150 if ($dateModified) {
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151 $date = new DateTime($dateModified);
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152 }
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153
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154 $this->data['datemodified'] = $date;
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155
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156 return $this->data['datemodified'];
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157 }
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158
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159 /**
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160 * Get the feed description
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161 *
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162 * @return string|null
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163 */
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164 public function getDescription()
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165 {
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166 if (array_key_exists('description', $this->data)) {
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167 return $this->data['description'];
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168 }
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169
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170 $description = null;
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171
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172 if ($this->getType() === Reader\Reader::TYPE_ATOM_03) {
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173 $description = $this->xpath->evaluate('string(' . $this->getXpathPrefix() . '/atom:tagline)');
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174 } else {
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175 $description = $this->xpath->evaluate('string(' . $this->getXpathPrefix() . '/atom:subtitle)');
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176 }
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177
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178 if (! $description) {
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179 $description = null;
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180 }
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181
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182 $this->data['description'] = $description;
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183
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184 return $this->data['description'];
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185 }
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186
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187 /**
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188 * Get the feed generator entry
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189 *
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190 * @return string|null
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191 */
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192 public function getGenerator()
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193 {
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194 if (array_key_exists('generator', $this->data)) {
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195 return $this->data['generator'];
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196 }
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197 // TODO: Add uri support
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198 $generator = $this->xpath->evaluate('string(' . $this->getXpathPrefix() . '/atom:generator)');
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199
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200 if (! $generator) {
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201 $generator = null;
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202 }
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203
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204 $this->data['generator'] = $generator;
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205
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206 return $this->data['generator'];
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207 }
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208
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209 /**
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210 * Get the feed ID
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211 *
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212 * @return string|null
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213 */
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214 public function getId()
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215 {
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216 if (array_key_exists('id', $this->data)) {
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217 return $this->data['id'];
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218 }
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219
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220 $id = $this->xpath->evaluate('string(' . $this->getXpathPrefix() . '/atom:id)');
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221
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222 if (! $id) {
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223 if ($this->getLink()) {
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224 $id = $this->getLink();
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225 } elseif ($this->getTitle()) {
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226 $id = $this->getTitle();
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227 } else {
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228 $id = null;
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229 }
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230 }
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231
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232 $this->data['id'] = $id;
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233
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234 return $this->data['id'];
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235 }
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236
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237 /**
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238 * Get the feed language
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239 *
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240 * @return string|null
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241 */
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242 public function getLanguage()
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243 {
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244 if (array_key_exists('language', $this->data)) {
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245 return $this->data['language'];
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246 }
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247
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248 $language = $this->xpath->evaluate('string(' . $this->getXpathPrefix() . '/atom:lang)');
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249
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250 if (! $language) {
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251 $language = $this->xpath->evaluate('string(//@xml:lang[1])');
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252 }
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253
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254 if (! $language) {
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255 $language = null;
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256 }
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257
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258 $this->data['language'] = $language;
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259
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260 return $this->data['language'];
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261 }
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262
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263 /**
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264 * Get the feed image
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265 *
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266 * @return array|null
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267 */
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268 public function getImage()
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269 {
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270 if (array_key_exists('image', $this->data)) {
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271 return $this->data['image'];
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272 }
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273
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274 $imageUrl = $this->xpath->evaluate('string(' . $this->getXpathPrefix() . '/atom:logo)');
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275
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276 if (! $imageUrl) {
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277 $image = null;
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278 } else {
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279 $image = ['uri' => $imageUrl];
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280 }
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281
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282 $this->data['image'] = $image;
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283
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284 return $this->data['image'];
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285 }
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286
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287 /**
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288 * Get the base URI of the feed (if set).
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289 *
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290 * @return string|null
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291 */
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292 public function getBaseUrl()
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293 {
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294 if (array_key_exists('baseUrl', $this->data)) {
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295 return $this->data['baseUrl'];
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296 }
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297
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298 $baseUrl = $this->xpath->evaluate('string(//@xml:base[1])');
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299
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300 if (! $baseUrl) {
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301 $baseUrl = null;
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302 }
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303 $this->data['baseUrl'] = $baseUrl;
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304
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305 return $this->data['baseUrl'];
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306 }
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307
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308 /**
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309 * Get a link to the source website
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310 *
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311 * @return string|null
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312 */
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313 public function getLink()
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314 {
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315 if (array_key_exists('link', $this->data)) {
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316 return $this->data['link'];
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317 }
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318
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319 $link = null;
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320
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321 $list = $this->xpath->query(
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322 $this->getXpathPrefix() . '/atom:link[@rel="alternate"]/@href' . '|' .
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323 $this->getXpathPrefix() . '/atom:link[not(@rel)]/@href'
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324 );
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325
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326 if ($list->length) {
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327 $link = $list->item(0)->nodeValue;
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328 $link = $this->absolutiseUri($link);
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329 }
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330
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331 $this->data['link'] = $link;
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332
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333 return $this->data['link'];
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334 }
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335
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336 /**
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337 * Get a link to the feed's XML Url
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338 *
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339 * @return string|null
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340 */
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341 public function getFeedLink()
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342 {
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343 if (array_key_exists('feedlink', $this->data)) {
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344 return $this->data['feedlink'];
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345 }
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346
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347 $link = $this->xpath->evaluate('string(' . $this->getXpathPrefix() . '/atom:link[@rel="self"]/@href)');
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348
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349 $link = $this->absolutiseUri($link);
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350
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351 $this->data['feedlink'] = $link;
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352
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353 return $this->data['feedlink'];
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354 }
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355
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356 /**
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357 * Get an array of any supported Pusubhubbub endpoints
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358 *
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359 * @return array|null
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360 */
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361 public function getHubs()
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362 {
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363 if (array_key_exists('hubs', $this->data)) {
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364 return $this->data['hubs'];
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365 }
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366 $hubs = [];
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367
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368 $list = $this->xpath->query($this->getXpathPrefix()
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369 . '//atom:link[@rel="hub"]/@href');
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370
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371 if ($list->length) {
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372 foreach ($list as $uri) {
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373 $hubs[] = $this->absolutiseUri($uri->nodeValue);
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374 }
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375 } else {
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376 $hubs = null;
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377 }
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378
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379 $this->data['hubs'] = $hubs;
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380
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381 return $this->data['hubs'];
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382 }
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383
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384 /**
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385 * Get the feed title
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386 *
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387 * @return string|null
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388 */
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389 public function getTitle()
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390 {
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391 if (array_key_exists('title', $this->data)) {
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392 return $this->data['title'];
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393 }
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394
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395 $title = $this->xpath->evaluate('string(' . $this->getXpathPrefix() . '/atom:title)');
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396
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397 if (! $title) {
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398 $title = null;
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399 }
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400
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401 $this->data['title'] = $title;
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402
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403 return $this->data['title'];
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404 }
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405
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406 /**
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407 * Get all categories
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408 *
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409 * @return Collection\Category
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410 */
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411 public function getCategories()
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412 {
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413 if (array_key_exists('categories', $this->data)) {
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414 return $this->data['categories'];
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415 }
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416
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417 if ($this->getType() == Reader\Reader::TYPE_ATOM_10) {
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418 $list = $this->xpath->query($this->getXpathPrefix() . '/atom:category');
|
Chris@0
|
419 } else {
|
Chris@0
|
420 /**
|
Chris@0
|
421 * Since Atom 0.3 did not support categories, it would have used the
|
Chris@0
|
422 * Dublin Core extension. However there is a small possibility Atom 0.3
|
Chris@0
|
423 * may have been retrofittied to use Atom 1.0 instead.
|
Chris@0
|
424 */
|
Chris@0
|
425 $this->xpath->registerNamespace('atom10', Reader\Reader::NAMESPACE_ATOM_10);
|
Chris@0
|
426 $list = $this->xpath->query($this->getXpathPrefix() . '/atom10:category');
|
Chris@0
|
427 }
|
Chris@0
|
428
|
Chris@0
|
429 if ($list->length) {
|
Chris@0
|
430 $categoryCollection = new Collection\Category;
|
Chris@0
|
431 foreach ($list as $category) {
|
Chris@0
|
432 $categoryCollection[] = [
|
Chris@0
|
433 'term' => $category->getAttribute('term'),
|
Chris@0
|
434 'scheme' => $category->getAttribute('scheme'),
|
Chris@0
|
435 'label' => $category->getAttribute('label')
|
Chris@0
|
436 ];
|
Chris@0
|
437 }
|
Chris@0
|
438 } else {
|
Chris@0
|
439 return new Collection\Category;
|
Chris@0
|
440 }
|
Chris@0
|
441
|
Chris@0
|
442 $this->data['categories'] = $categoryCollection;
|
Chris@0
|
443
|
Chris@0
|
444 return $this->data['categories'];
|
Chris@0
|
445 }
|
Chris@0
|
446
|
Chris@0
|
447 /**
|
Chris@0
|
448 * Get an author entry in RSS format
|
Chris@0
|
449 *
|
Chris@0
|
450 * @param DOMElement $element
|
Chris@0
|
451 * @return string
|
Chris@0
|
452 */
|
Chris@0
|
453 protected function getAuthorFromElement(DOMElement $element)
|
Chris@0
|
454 {
|
Chris@0
|
455 $author = [];
|
Chris@0
|
456
|
Chris@0
|
457 $emailNode = $element->getElementsByTagName('email');
|
Chris@0
|
458 $nameNode = $element->getElementsByTagName('name');
|
Chris@0
|
459 $uriNode = $element->getElementsByTagName('uri');
|
Chris@0
|
460
|
Chris@0
|
461 if ($emailNode->length && strlen($emailNode->item(0)->nodeValue) > 0) {
|
Chris@0
|
462 $author['email'] = $emailNode->item(0)->nodeValue;
|
Chris@0
|
463 }
|
Chris@0
|
464
|
Chris@0
|
465 if ($nameNode->length && strlen($nameNode->item(0)->nodeValue) > 0) {
|
Chris@0
|
466 $author['name'] = $nameNode->item(0)->nodeValue;
|
Chris@0
|
467 }
|
Chris@0
|
468
|
Chris@0
|
469 if ($uriNode->length && strlen($uriNode->item(0)->nodeValue) > 0) {
|
Chris@0
|
470 $author['uri'] = $uriNode->item(0)->nodeValue;
|
Chris@0
|
471 }
|
Chris@0
|
472
|
Chris@0
|
473 if (empty($author)) {
|
Chris@0
|
474 return;
|
Chris@0
|
475 }
|
Chris@0
|
476 return $author;
|
Chris@0
|
477 }
|
Chris@0
|
478
|
Chris@0
|
479 /**
|
Chris@0
|
480 * Attempt to absolutise the URI, i.e. if a relative URI apply the
|
Chris@0
|
481 * xml:base value as a prefix to turn into an absolute URI.
|
Chris@17
|
482 *
|
Chris@17
|
483 * @param string $link
|
Chris@17
|
484 * @return string|null
|
Chris@0
|
485 */
|
Chris@0
|
486 protected function absolutiseUri($link)
|
Chris@0
|
487 {
|
Chris@12
|
488 if (! Uri::factory($link)->isAbsolute()) {
|
Chris@0
|
489 if ($this->getBaseUrl() !== null) {
|
Chris@0
|
490 $link = $this->getBaseUrl() . $link;
|
Chris@12
|
491 if (! Uri::factory($link)->isValid()) {
|
Chris@0
|
492 $link = null;
|
Chris@0
|
493 }
|
Chris@0
|
494 }
|
Chris@0
|
495 }
|
Chris@0
|
496 return $link;
|
Chris@0
|
497 }
|
Chris@0
|
498
|
Chris@0
|
499 /**
|
Chris@0
|
500 * Register the default namespaces for the current feed format
|
Chris@0
|
501 */
|
Chris@0
|
502 protected function registerNamespaces()
|
Chris@0
|
503 {
|
Chris@0
|
504 if ($this->getType() == Reader\Reader::TYPE_ATOM_10
|
Chris@0
|
505 || $this->getType() == Reader\Reader::TYPE_ATOM_03
|
Chris@0
|
506 ) {
|
Chris@0
|
507 return; // pre-registered at Feed level
|
Chris@0
|
508 }
|
Chris@0
|
509 $atomDetected = $this->getAtomType();
|
Chris@0
|
510 switch ($atomDetected) {
|
Chris@0
|
511 case Reader\Reader::TYPE_ATOM_03:
|
Chris@0
|
512 $this->xpath->registerNamespace('atom', Reader\Reader::NAMESPACE_ATOM_03);
|
Chris@0
|
513 break;
|
Chris@0
|
514 default:
|
Chris@0
|
515 $this->xpath->registerNamespace('atom', Reader\Reader::NAMESPACE_ATOM_10);
|
Chris@0
|
516 break;
|
Chris@0
|
517 }
|
Chris@0
|
518 }
|
Chris@0
|
519
|
Chris@0
|
520 /**
|
Chris@0
|
521 * Detect the presence of any Atom namespaces in use
|
Chris@0
|
522 */
|
Chris@0
|
523 protected function getAtomType()
|
Chris@0
|
524 {
|
Chris@0
|
525 $dom = $this->getDomDocument();
|
Chris@0
|
526 $prefixAtom03 = $dom->lookupPrefix(Reader\Reader::NAMESPACE_ATOM_03);
|
Chris@0
|
527 $prefixAtom10 = $dom->lookupPrefix(Reader\Reader::NAMESPACE_ATOM_10);
|
Chris@0
|
528 if ($dom->isDefaultNamespace(Reader\Reader::NAMESPACE_ATOM_10)
|
Chris@12
|
529 || ! empty($prefixAtom10)
|
Chris@0
|
530 ) {
|
Chris@0
|
531 return Reader\Reader::TYPE_ATOM_10;
|
Chris@0
|
532 }
|
Chris@0
|
533 if ($dom->isDefaultNamespace(Reader\Reader::NAMESPACE_ATOM_03)
|
Chris@12
|
534 || ! empty($prefixAtom03)
|
Chris@0
|
535 ) {
|
Chris@0
|
536 return Reader\Reader::TYPE_ATOM_03;
|
Chris@0
|
537 }
|
Chris@0
|
538 }
|
Chris@0
|
539 }
|