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1 | <?php |
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2 | /** |
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3 | * Holder of replacement pairs for wiki links |
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4 | * |
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5 | * This program is free software; you can redistribute it and/or modify |
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6 | * it under the terms of the GNU General Public License as published by |
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7 | * the Free Software Foundation; either version 2 of the License, or |
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8 | * (at your option) any later version. |
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9 | * |
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10 | * This program is distributed in the hope that it will be useful, |
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11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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13 | * GNU General Public License for more details. |
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14 | * |
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15 | * You should have received a copy of the GNU General Public License along |
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16 | * with this program; if not, write to the Free Software Foundation, Inc., |
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17 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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18 | * http://www.gnu.org/copyleft/gpl.html |
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19 | * |
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20 | * @file |
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21 | * @ingroup Parser |
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22 | */ |
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23 | |||
24 | /** |
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25 | * @ingroup Parser |
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26 | */ |
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27 | class LinkHolderArray { |
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28 | public $internals = []; |
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29 | public $interwikis = []; |
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30 | public $size = 0; |
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31 | |||
32 | /** |
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33 | * @var Parser |
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34 | */ |
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35 | public $parent; |
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36 | protected $tempIdOffset; |
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37 | |||
38 | /** |
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39 | * @param Parser $parent |
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40 | */ |
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41 | public function __construct( $parent ) { |
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42 | $this->parent = $parent; |
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43 | } |
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44 | |||
45 | /** |
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46 | * Reduce memory usage to reduce the impact of circular references |
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47 | */ |
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48 | public function __destruct() { |
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49 | foreach ( $this as $name => $value ) { |
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50 | unset( $this->$name ); |
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51 | } |
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52 | } |
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53 | |||
54 | /** |
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55 | * Don't serialize the parent object, it is big, and not needed when it is |
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56 | * a parameter to mergeForeign(), which is the only application of |
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57 | * serializing at present. |
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58 | * |
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59 | * Compact the titles, only serialize the text form. |
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60 | * @return array |
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61 | */ |
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62 | public function __sleep() { |
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63 | foreach ( $this->internals as &$nsLinks ) { |
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64 | foreach ( $nsLinks as &$entry ) { |
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65 | unset( $entry['title'] ); |
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66 | } |
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67 | } |
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68 | unset( $nsLinks ); |
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69 | unset( $entry ); |
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70 | |||
71 | foreach ( $this->interwikis as &$entry ) { |
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72 | unset( $entry['title'] ); |
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73 | } |
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74 | unset( $entry ); |
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75 | |||
76 | return [ 'internals', 'interwikis', 'size' ]; |
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77 | } |
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78 | |||
79 | /** |
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80 | * Recreate the Title objects |
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81 | */ |
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82 | public function __wakeup() { |
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83 | foreach ( $this->internals as &$nsLinks ) { |
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84 | foreach ( $nsLinks as &$entry ) { |
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85 | $entry['title'] = Title::newFromText( $entry['pdbk'] ); |
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86 | } |
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87 | } |
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88 | unset( $nsLinks ); |
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89 | unset( $entry ); |
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90 | |||
91 | foreach ( $this->interwikis as &$entry ) { |
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92 | $entry['title'] = Title::newFromText( $entry['pdbk'] ); |
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93 | } |
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94 | unset( $entry ); |
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95 | } |
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96 | |||
97 | /** |
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98 | * Merge another LinkHolderArray into this one |
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99 | * @param LinkHolderArray $other |
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100 | */ |
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101 | public function merge( $other ) { |
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102 | foreach ( $other->internals as $ns => $entries ) { |
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103 | $this->size += count( $entries ); |
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104 | if ( !isset( $this->internals[$ns] ) ) { |
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105 | $this->internals[$ns] = $entries; |
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106 | } else { |
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107 | $this->internals[$ns] += $entries; |
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108 | } |
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109 | } |
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110 | $this->interwikis += $other->interwikis; |
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111 | } |
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112 | |||
113 | /** |
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114 | * Merge a LinkHolderArray from another parser instance into this one. The |
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115 | * keys will not be preserved. Any text which went with the old |
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116 | * LinkHolderArray and needs to work with the new one should be passed in |
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117 | * the $texts array. The strings in this array will have their link holders |
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118 | * converted for use in the destination link holder. The resulting array of |
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119 | * strings will be returned. |
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120 | * |
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121 | * @param LinkHolderArray $other |
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122 | * @param array $texts Array of strings |
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123 | * @return array |
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124 | */ |
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125 | public function mergeForeign( $other, $texts ) { |
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126 | $this->tempIdOffset = $idOffset = $this->parent->nextLinkID(); |
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127 | $maxId = 0; |
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128 | |||
129 | # Renumber internal links |
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130 | foreach ( $other->internals as $ns => $nsLinks ) { |
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131 | View Code Duplication | foreach ( $nsLinks as $key => $entry ) { |
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132 | $newKey = $idOffset + $key; |
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133 | $this->internals[$ns][$newKey] = $entry; |
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134 | $maxId = $newKey > $maxId ? $newKey : $maxId; |
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135 | } |
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136 | } |
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137 | $texts = preg_replace_callback( '/(<!--LINK \d+:)(\d+)(-->)/', |
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138 | [ $this, 'mergeForeignCallback' ], $texts ); |
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139 | |||
140 | # Renumber interwiki links |
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141 | View Code Duplication | foreach ( $other->interwikis as $key => $entry ) { |
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142 | $newKey = $idOffset + $key; |
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143 | $this->interwikis[$newKey] = $entry; |
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144 | $maxId = $newKey > $maxId ? $newKey : $maxId; |
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145 | } |
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146 | $texts = preg_replace_callback( '/(<!--IWLINK )(\d+)(-->)/', |
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147 | [ $this, 'mergeForeignCallback' ], $texts ); |
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148 | |||
149 | # Set the parent link ID to be beyond the highest used ID |
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150 | $this->parent->setLinkID( $maxId + 1 ); |
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151 | $this->tempIdOffset = null; |
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152 | return $texts; |
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153 | } |
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154 | |||
155 | /** |
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156 | * @param array $m |
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157 | * @return string |
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158 | */ |
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159 | protected function mergeForeignCallback( $m ) { |
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160 | return $m[1] . ( $m[2] + $this->tempIdOffset ) . $m[3]; |
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161 | } |
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162 | |||
163 | /** |
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164 | * Get a subset of the current LinkHolderArray which is sufficient to |
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165 | * interpret the given text. |
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166 | * @param string $text |
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167 | * @return LinkHolderArray |
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168 | */ |
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169 | public function getSubArray( $text ) { |
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170 | $sub = new LinkHolderArray( $this->parent ); |
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171 | |||
172 | # Internal links |
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173 | $pos = 0; |
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174 | while ( $pos < strlen( $text ) ) { |
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175 | if ( !preg_match( '/<!--LINK (\d+):(\d+)-->/', |
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176 | $text, $m, PREG_OFFSET_CAPTURE, $pos ) |
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177 | ) { |
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178 | break; |
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179 | } |
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180 | $ns = $m[1][0]; |
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181 | $key = $m[2][0]; |
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182 | $sub->internals[$ns][$key] = $this->internals[$ns][$key]; |
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183 | $pos = $m[0][1] + strlen( $m[0][0] ); |
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184 | } |
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185 | |||
186 | # Interwiki links |
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187 | $pos = 0; |
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188 | while ( $pos < strlen( $text ) ) { |
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189 | if ( !preg_match( '/<!--IWLINK (\d+)-->/', $text, $m, PREG_OFFSET_CAPTURE, $pos ) ) { |
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190 | break; |
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191 | } |
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192 | $key = $m[1][0]; |
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193 | $sub->interwikis[$key] = $this->interwikis[$key]; |
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194 | $pos = $m[0][1] + strlen( $m[0][0] ); |
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195 | } |
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196 | return $sub; |
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197 | } |
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198 | |||
199 | /** |
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200 | * Returns true if the memory requirements of this object are getting large |
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201 | * @return bool |
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202 | */ |
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203 | public function isBig() { |
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204 | global $wgLinkHolderBatchSize; |
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205 | return $this->size > $wgLinkHolderBatchSize; |
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206 | } |
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207 | |||
208 | /** |
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209 | * Clear all stored link holders. |
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210 | * Make sure you don't have any text left using these link holders, before you call this |
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211 | */ |
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212 | public function clear() { |
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213 | $this->internals = []; |
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214 | $this->interwikis = []; |
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215 | $this->size = 0; |
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216 | } |
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217 | |||
218 | /** |
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219 | * Make a link placeholder. The text returned can be later resolved to a real link with |
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220 | * replaceLinkHolders(). This is done for two reasons: firstly to avoid further |
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221 | * parsing of interwiki links, and secondly to allow all existence checks and |
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222 | * article length checks (for stub links) to be bundled into a single query. |
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223 | * |
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224 | * @param Title $nt |
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225 | * @param string $text |
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226 | * @param array $query [optional] |
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227 | * @param string $trail [optional] |
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228 | * @param string $prefix [optional] |
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229 | * @return string |
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230 | */ |
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231 | public function makeHolder( $nt, $text = '', $query = [], $trail = '', $prefix = '' ) { |
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232 | if ( !is_object( $nt ) ) { |
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233 | # Fail gracefully |
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234 | $retVal = "<!-- ERROR -->{$prefix}{$text}{$trail}"; |
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235 | } else { |
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236 | # Separate the link trail from the rest of the link |
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237 | list( $inside, $trail ) = Linker::splitTrail( $trail ); |
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238 | |||
239 | $entry = [ |
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240 | 'title' => $nt, |
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241 | 'text' => $prefix . $text . $inside, |
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242 | 'pdbk' => $nt->getPrefixedDBkey(), |
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243 | ]; |
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244 | if ( $query !== [] ) { |
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245 | $entry['query'] = $query; |
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246 | } |
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247 | |||
248 | if ( $nt->isExternal() ) { |
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249 | // Use a globally unique ID to keep the objects mergable |
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250 | $key = $this->parent->nextLinkID(); |
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251 | $this->interwikis[$key] = $entry; |
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252 | $retVal = "<!--IWLINK $key-->{$trail}"; |
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253 | } else { |
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254 | $key = $this->parent->nextLinkID(); |
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255 | $ns = $nt->getNamespace(); |
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256 | $this->internals[$ns][$key] = $entry; |
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257 | $retVal = "<!--LINK $ns:$key-->{$trail}"; |
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258 | } |
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259 | $this->size++; |
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260 | } |
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261 | return $retVal; |
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262 | } |
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263 | |||
264 | /** |
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265 | * Replace <!--LINK--> link placeholders with actual links, in the buffer |
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266 | * |
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267 | * @param string $text |
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268 | */ |
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269 | public function replace( &$text ) { |
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270 | |||
271 | $this->replaceInternal( $text ); |
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272 | $this->replaceInterwiki( $text ); |
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273 | |||
274 | } |
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275 | |||
276 | /** |
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277 | * Replace internal links |
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278 | * @param string $text |
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279 | */ |
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280 | protected function replaceInternal( &$text ) { |
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281 | if ( !$this->internals ) { |
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282 | return; |
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283 | } |
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284 | |||
285 | global $wgContLang; |
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286 | |||
287 | $colours = []; |
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288 | $linkCache = LinkCache::singleton(); |
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289 | $output = $this->parent->getOutput(); |
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290 | $linkRenderer = $this->parent->getLinkRenderer(); |
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291 | |||
292 | $dbr = wfGetDB( DB_REPLICA ); |
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293 | |||
294 | # Sort by namespace |
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295 | ksort( $this->internals ); |
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296 | |||
297 | $linkcolour_ids = []; |
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298 | |||
299 | # Generate query |
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300 | $lb = new LinkBatch(); |
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301 | $lb->setCaller( __METHOD__ ); |
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302 | |||
303 | foreach ( $this->internals as $ns => $entries ) { |
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304 | foreach ( $entries as $entry ) { |
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305 | /** @var Title $title */ |
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306 | $title = $entry['title']; |
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307 | $pdbk = $entry['pdbk']; |
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308 | |||
309 | # Skip invalid entries. |
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310 | # Result will be ugly, but prevents crash. |
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311 | if ( is_null( $title ) ) { |
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312 | continue; |
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313 | } |
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314 | |||
315 | # Check if it's a static known link, e.g. interwiki |
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316 | if ( $title->isAlwaysKnown() ) { |
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317 | $colours[$pdbk] = ''; |
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318 | } elseif ( $ns == NS_SPECIAL ) { |
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319 | $colours[$pdbk] = 'new'; |
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320 | } else { |
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321 | $id = $linkCache->getGoodLinkID( $pdbk ); |
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322 | if ( $id != 0 ) { |
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323 | $colours[$pdbk] = $linkRenderer->getLinkClasses( $title ); |
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324 | $output->addLink( $title, $id ); |
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325 | $linkcolour_ids[$id] = $pdbk; |
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326 | } elseif ( $linkCache->isBadLink( $pdbk ) ) { |
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327 | $colours[$pdbk] = 'new'; |
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328 | } else { |
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329 | # Not in the link cache, add it to the query |
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330 | $lb->addObj( $title ); |
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331 | } |
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332 | } |
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333 | } |
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334 | } |
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335 | if ( !$lb->isEmpty() ) { |
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336 | $fields = array_merge( |
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337 | LinkCache::getSelectFields(), |
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338 | [ 'page_namespace', 'page_title' ] |
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339 | ); |
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340 | |||
341 | $res = $dbr->select( |
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342 | 'page', |
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343 | $fields, |
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344 | $lb->constructSet( 'page', $dbr ), |
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345 | __METHOD__ |
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346 | ); |
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347 | |||
348 | # Fetch data and form into an associative array |
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349 | # non-existent = broken |
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350 | foreach ( $res as $s ) { |
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351 | $title = Title::makeTitle( $s->page_namespace, $s->page_title ); |
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352 | $pdbk = $title->getPrefixedDBkey(); |
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353 | $linkCache->addGoodLinkObjFromRow( $title, $s ); |
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354 | $output->addLink( $title, $s->page_id ); |
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355 | $colours[$pdbk] = $linkRenderer->getLinkClasses( $title ); |
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356 | // add id to the extension todolist |
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357 | $linkcolour_ids[$s->page_id] = $pdbk; |
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358 | } |
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359 | unset( $res ); |
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360 | } |
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361 | if ( count( $linkcolour_ids ) ) { |
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362 | // pass an array of page_ids to an extension |
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363 | Hooks::run( 'GetLinkColours', [ $linkcolour_ids, &$colours ] ); |
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364 | } |
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365 | |||
366 | # Do a second query for different language variants of links and categories |
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367 | if ( $wgContLang->hasVariants() ) { |
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368 | $this->doVariants( $colours ); |
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369 | } |
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370 | |||
371 | # Construct search and replace arrays |
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372 | $replacePairs = []; |
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373 | foreach ( $this->internals as $ns => $entries ) { |
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374 | foreach ( $entries as $index => $entry ) { |
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375 | $pdbk = $entry['pdbk']; |
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376 | $title = $entry['title']; |
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377 | $query = isset( $entry['query'] ) ? $entry['query'] : []; |
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378 | $key = "$ns:$index"; |
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379 | $searchkey = "<!--LINK $key-->"; |
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380 | $displayText = $entry['text']; |
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381 | if ( isset( $entry['selflink'] ) ) { |
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382 | $replacePairs[$searchkey] = Linker::makeSelfLinkObj( $title, $displayText, $query ); |
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383 | continue; |
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384 | } |
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385 | if ( $displayText === '' ) { |
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386 | $displayText = null; |
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387 | } else { |
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388 | $displayText = new HtmlArmor( $displayText ); |
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389 | } |
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390 | if ( !isset( $colours[$pdbk] ) ) { |
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391 | $colours[$pdbk] = 'new'; |
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392 | } |
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393 | $attribs = []; |
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394 | if ( $colours[$pdbk] == 'new' ) { |
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395 | $linkCache->addBadLinkObj( $title ); |
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396 | $output->addLink( $title, 0 ); |
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397 | $link = $linkRenderer->makeBrokenLink( |
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398 | $title, $displayText, $attribs, $query |
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399 | ); |
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400 | } else { |
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401 | $link = $linkRenderer->makePreloadedLink( |
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402 | $title, $displayText, $colours[$pdbk], $attribs, $query |
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403 | ); |
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404 | } |
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405 | |||
406 | $replacePairs[$searchkey] = $link; |
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407 | } |
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408 | } |
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409 | $replacer = new HashtableReplacer( $replacePairs, 1 ); |
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410 | |||
411 | # Do the thing |
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412 | $text = preg_replace_callback( |
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413 | '/(<!--LINK .*?-->)/', |
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414 | $replacer->cb(), |
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415 | $text |
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416 | ); |
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417 | |||
418 | } |
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419 | |||
420 | /** |
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421 | * Replace interwiki links |
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422 | * @param string $text |
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423 | */ |
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424 | protected function replaceInterwiki( &$text ) { |
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425 | if ( empty( $this->interwikis ) ) { |
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426 | return; |
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427 | } |
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428 | |||
429 | # Make interwiki link HTML |
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430 | $output = $this->parent->getOutput(); |
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431 | $replacePairs = []; |
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432 | $linkRenderer = $this->parent->getLinkRenderer(); |
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433 | foreach ( $this->interwikis as $key => $link ) { |
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434 | $replacePairs[$key] = $linkRenderer->makeLink( |
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435 | $link['title'], |
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436 | new HtmlArmor( $link['text'] ) |
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437 | ); |
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438 | $output->addInterwikiLink( $link['title'] ); |
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439 | } |
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440 | $replacer = new HashtableReplacer( $replacePairs, 1 ); |
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441 | |||
442 | $text = preg_replace_callback( |
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443 | '/<!--IWLINK (.*?)-->/', |
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444 | $replacer->cb(), |
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445 | $text ); |
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446 | } |
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447 | |||
448 | /** |
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449 | * Modify $this->internals and $colours according to language variant linking rules |
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450 | * @param array $colours |
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451 | */ |
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452 | protected function doVariants( &$colours ) { |
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453 | global $wgContLang; |
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454 | $linkBatch = new LinkBatch(); |
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455 | $variantMap = []; // maps $pdbkey_Variant => $keys (of link holders) |
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456 | $output = $this->parent->getOutput(); |
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457 | $linkCache = LinkCache::singleton(); |
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458 | $titlesToBeConverted = ''; |
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459 | $titlesAttrs = []; |
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460 | |||
461 | // Concatenate titles to a single string, thus we only need auto convert the |
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462 | // single string to all variants. This would improve parser's performance |
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463 | // significantly. |
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464 | foreach ( $this->internals as $ns => $entries ) { |
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465 | if ( $ns == NS_SPECIAL ) { |
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466 | continue; |
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467 | } |
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468 | foreach ( $entries as $index => $entry ) { |
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469 | $pdbk = $entry['pdbk']; |
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470 | // we only deal with new links (in its first query) |
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471 | if ( !isset( $colours[$pdbk] ) || $colours[$pdbk] === 'new' ) { |
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472 | $titlesAttrs[] = [ $index, $entry['title'] ]; |
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473 | // separate titles with \0 because it would never appears |
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474 | // in a valid title |
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475 | $titlesToBeConverted .= $entry['title']->getText() . "\0"; |
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476 | } |
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477 | } |
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478 | } |
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479 | |||
480 | // Now do the conversion and explode string to text of titles |
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481 | $titlesAllVariants = $wgContLang->autoConvertToAllVariants( rtrim( $titlesToBeConverted, "\0" ) ); |
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482 | $allVariantsName = array_keys( $titlesAllVariants ); |
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483 | foreach ( $titlesAllVariants as &$titlesVariant ) { |
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484 | $titlesVariant = explode( "\0", $titlesVariant ); |
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485 | } |
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486 | |||
487 | // Then add variants of links to link batch |
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488 | $parentTitle = $this->parent->getTitle(); |
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489 | foreach ( $titlesAttrs as $i => $attrs ) { |
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490 | /** @var Title $title */ |
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491 | list( $index, $title ) = $attrs; |
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492 | $ns = $title->getNamespace(); |
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493 | $text = $title->getText(); |
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494 | |||
495 | foreach ( $allVariantsName as $variantName ) { |
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496 | $textVariant = $titlesAllVariants[$variantName][$i]; |
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497 | if ( $textVariant === $text ) { |
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498 | continue; |
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499 | } |
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500 | |||
501 | $variantTitle = Title::makeTitle( $ns, $textVariant ); |
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502 | |||
503 | // Self-link checking for mixed/different variant titles. At this point, we |
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504 | // already know the exact title does not exist, so the link cannot be to a |
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505 | // variant of the current title that exists as a separate page. |
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506 | if ( $variantTitle->equals( $parentTitle ) && !$title->hasFragment() ) { |
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507 | $this->internals[$ns][$index]['selflink'] = true; |
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508 | continue 2; |
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509 | } |
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510 | |||
511 | $linkBatch->addObj( $variantTitle ); |
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512 | $variantMap[$variantTitle->getPrefixedDBkey()][] = "$ns:$index"; |
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513 | } |
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514 | } |
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515 | |||
516 | // process categories, check if a category exists in some variant |
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517 | $categoryMap = []; // maps $category_variant => $category (dbkeys) |
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518 | $varCategories = []; // category replacements oldDBkey => newDBkey |
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519 | foreach ( $output->getCategoryLinks() as $category ) { |
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520 | $categoryTitle = Title::makeTitleSafe( NS_CATEGORY, $category ); |
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521 | $linkBatch->addObj( $categoryTitle ); |
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0 ignored issues
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|||
522 | $variants = $wgContLang->autoConvertToAllVariants( $category ); |
||
523 | foreach ( $variants as $variant ) { |
||
524 | if ( $variant !== $category ) { |
||
525 | $variantTitle = Title::makeTitleSafe( NS_CATEGORY, $variant ); |
||
526 | if ( is_null( $variantTitle ) ) { |
||
527 | continue; |
||
528 | } |
||
529 | $linkBatch->addObj( $variantTitle ); |
||
530 | $categoryMap[$variant] = [ $category, $categoryTitle ]; |
||
531 | } |
||
532 | } |
||
533 | } |
||
534 | |||
535 | if ( !$linkBatch->isEmpty() ) { |
||
536 | // construct query |
||
537 | $dbr = wfGetDB( DB_REPLICA ); |
||
538 | $fields = array_merge( |
||
539 | LinkCache::getSelectFields(), |
||
540 | [ 'page_namespace', 'page_title' ] |
||
541 | ); |
||
542 | |||
543 | $varRes = $dbr->select( 'page', |
||
544 | $fields, |
||
545 | $linkBatch->constructSet( 'page', $dbr ), |
||
546 | __METHOD__ |
||
547 | ); |
||
548 | |||
549 | $linkcolour_ids = []; |
||
550 | $linkRenderer = $this->parent->getLinkRenderer(); |
||
551 | |||
552 | // for each found variants, figure out link holders and replace |
||
553 | foreach ( $varRes as $s ) { |
||
554 | $variantTitle = Title::makeTitle( $s->page_namespace, $s->page_title ); |
||
555 | $varPdbk = $variantTitle->getPrefixedDBkey(); |
||
556 | $vardbk = $variantTitle->getDBkey(); |
||
557 | |||
558 | $holderKeys = []; |
||
559 | if ( isset( $variantMap[$varPdbk] ) ) { |
||
560 | $holderKeys = $variantMap[$varPdbk]; |
||
561 | $linkCache->addGoodLinkObjFromRow( $variantTitle, $s ); |
||
562 | $output->addLink( $variantTitle, $s->page_id ); |
||
563 | } |
||
564 | |||
565 | // loop over link holders |
||
566 | foreach ( $holderKeys as $key ) { |
||
567 | list( $ns, $index ) = explode( ':', $key, 2 ); |
||
568 | $entry =& $this->internals[$ns][$index]; |
||
569 | $pdbk = $entry['pdbk']; |
||
570 | |||
571 | if ( !isset( $colours[$pdbk] ) || $colours[$pdbk] === 'new' ) { |
||
572 | // found link in some of the variants, replace the link holder data |
||
573 | $entry['title'] = $variantTitle; |
||
574 | $entry['pdbk'] = $varPdbk; |
||
575 | |||
576 | // set pdbk and colour |
||
577 | $colours[$varPdbk] = $linkRenderer->getLinkClasses( $variantTitle ); |
||
578 | $linkcolour_ids[$s->page_id] = $pdbk; |
||
579 | } |
||
580 | } |
||
581 | |||
582 | // check if the object is a variant of a category |
||
583 | if ( isset( $categoryMap[$vardbk] ) ) { |
||
584 | list( $oldkey, $oldtitle ) = $categoryMap[$vardbk]; |
||
585 | if ( !isset( $varCategories[$oldkey] ) && !$oldtitle->exists() ) { |
||
586 | $varCategories[$oldkey] = $vardbk; |
||
587 | } |
||
588 | } |
||
589 | } |
||
590 | Hooks::run( 'GetLinkColours', [ $linkcolour_ids, &$colours ] ); |
||
591 | |||
592 | // rebuild the categories in original order (if there are replacements) |
||
593 | if ( count( $varCategories ) > 0 ) { |
||
594 | $newCats = []; |
||
595 | $originalCats = $output->getCategories(); |
||
596 | foreach ( $originalCats as $cat => $sortkey ) { |
||
597 | // make the replacement |
||
598 | if ( array_key_exists( $cat, $varCategories ) ) { |
||
599 | $newCats[$varCategories[$cat]] = $sortkey; |
||
600 | } else { |
||
601 | $newCats[$cat] = $sortkey; |
||
602 | } |
||
603 | } |
||
604 | $output->setCategoryLinks( $newCats ); |
||
605 | } |
||
606 | } |
||
607 | } |
||
608 | |||
609 | /** |
||
610 | * Replace <!--LINK--> link placeholders with plain text of links |
||
611 | * (not HTML-formatted). |
||
612 | * |
||
613 | * @param string $text |
||
614 | * @return string |
||
615 | */ |
||
616 | public function replaceText( $text ) { |
||
617 | |||
618 | $text = preg_replace_callback( |
||
619 | '/<!--(LINK|IWLINK) (.*?)-->/', |
||
620 | [ &$this, 'replaceTextCallback' ], |
||
621 | $text ); |
||
622 | |||
623 | return $text; |
||
624 | } |
||
625 | |||
626 | /** |
||
627 | * Callback for replaceText() |
||
628 | * |
||
629 | * @param array $matches |
||
630 | * @return string |
||
631 | * @private |
||
632 | */ |
||
633 | public function replaceTextCallback( $matches ) { |
||
634 | $type = $matches[1]; |
||
635 | $key = $matches[2]; |
||
636 | if ( $type == 'LINK' ) { |
||
637 | list( $ns, $index ) = explode( ':', $key, 2 ); |
||
638 | if ( isset( $this->internals[$ns][$index]['text'] ) ) { |
||
639 | return $this->internals[$ns][$index]['text']; |
||
640 | } |
||
641 | } elseif ( $type == 'IWLINK' ) { |
||
642 | if ( isset( $this->interwikis[$key]['text'] ) ) { |
||
643 | return $this->interwikis[$key]['text']; |
||
644 | } |
||
645 | } |
||
646 | return $matches[0]; |
||
647 | } |
||
648 | } |
||
649 |
Unless you are absolutely sure that the expression can never be null because of other conditions, we strongly recommend to add an additional type check to your code: