Duplicate code is one of the most pungent code smells. A rule that is often used is to re-structure code once it is duplicated in three or more places.
Common duplication problems, and corresponding solutions are:
Complex classes like Handler often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes. You can also have a look at the cohesion graph to spot any un-connected, or weakly-connected components.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use Handler, and based on these observations, apply Extract Interface, too.
1 | <?php |
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25 | class Handler implements UrlAliasHandlerInterface |
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26 | { |
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27 | const ROOT_LOCATION_ID = 1; |
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28 | |||
29 | /** |
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30 | * This is intentionally hardcoded for now as: |
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31 | * 1. We don't implement this configuration option. |
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32 | * 2. Such option should not be in this layer, should be handled higher up. |
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33 | * |
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34 | * @deprecated |
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35 | */ |
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36 | const CONTENT_REPOSITORY_ROOT_LOCATION_ID = 2; |
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37 | |||
38 | /** |
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39 | * UrlAlias Gateway. |
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40 | * |
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41 | * @var \eZ\Publish\Core\Persistence\Legacy\Content\UrlAlias\Gateway |
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42 | */ |
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43 | protected $gateway; |
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44 | |||
45 | /** |
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46 | * Gateway for handling location data. |
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47 | * |
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48 | * @var \eZ\Publish\Core\Persistence\Legacy\Content\Location\Gateway |
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49 | */ |
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50 | protected $locationGateway; |
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51 | |||
52 | /** |
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53 | * UrlAlias Mapper. |
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54 | * |
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55 | * @var \eZ\Publish\Core\Persistence\Legacy\Content\UrlAlias\Mapper |
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56 | */ |
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57 | protected $mapper; |
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58 | |||
59 | /** |
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60 | * Caching language handler. |
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61 | * |
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62 | * @var \eZ\Publish\Core\Persistence\Legacy\Content\Language\CachingHandler |
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63 | */ |
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64 | protected $languageHandler; |
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65 | |||
66 | /** |
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67 | * URL slug converter. |
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68 | * |
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69 | * @var \eZ\Publish\Core\Persistence\Legacy\Content\UrlAlias\SlugConverter |
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70 | */ |
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71 | protected $slugConverter; |
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72 | |||
73 | /** |
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74 | * Creates a new UrlAlias Handler. |
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75 | * |
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76 | * @param \eZ\Publish\Core\Persistence\Legacy\Content\UrlAlias\Gateway $gateway |
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77 | * @param \eZ\Publish\Core\Persistence\Legacy\Content\UrlAlias\Mapper $mapper |
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78 | * @param \eZ\Publish\Core\Persistence\Legacy\Content\Location\Gateway $locationGateway |
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79 | * @param \eZ\Publish\SPI\Persistence\Content\Language\Handler $languageHandler |
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80 | * @param \eZ\Publish\Core\Persistence\Legacy\Content\UrlAlias\SlugConverter $slugConverter |
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81 | */ |
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82 | public function __construct( |
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95 | |||
96 | /** |
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97 | * This method creates or updates an urlalias from a new or changed content name in a language |
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98 | * (if published). It also can be used to create an alias for a new location of content. |
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99 | * On update the old alias is linked to the new one (i.e. a history alias is generated). |
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100 | * |
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101 | * $alwaysAvailable controls whether the url alias is accessible in all |
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102 | * languages. |
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103 | * |
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104 | * @param mixed $locationId |
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105 | * @param mixed $parentLocationId |
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106 | * @param string $name the new name computed by the name schema or url alias schema |
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107 | * @param string $languageCode |
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108 | * @param bool $alwaysAvailable |
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109 | * @param bool $updatePathIdentificationString legacy storage specific for updating ezcontentobject_tree.path_identification_string |
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110 | */ |
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111 | public function publishUrlAliasForLocation( |
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112 | $locationId, |
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113 | $parentLocationId, |
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114 | $name, |
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115 | $languageCode, |
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116 | $alwaysAvailable = false, |
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117 | $updatePathIdentificationString = false |
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118 | ) { |
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119 | $parentId = $this->getRealAliasId($parentLocationId); |
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120 | $uniqueCounter = $this->slugConverter->getUniqueCounterValue($name, $parentId == 0); |
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121 | $name = $this->slugConverter->convert($name, 'location_' . $locationId); |
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122 | $languageId = $this->languageHandler->loadByLanguageCode($languageCode)->id; |
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123 | $languageMask = $languageId | (int)$alwaysAvailable; |
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124 | $action = 'eznode:' . $locationId; |
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125 | $cleanup = false; |
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126 | |||
127 | // Exiting the loop with break; |
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128 | while (true) { |
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129 | $newText = ''; |
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130 | if ($locationId != self::CONTENT_REPOSITORY_ROOT_LOCATION_ID) { |
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131 | $newText = $name . ($uniqueCounter > 1 ? $uniqueCounter : ''); |
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132 | } |
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133 | $newTextMD5 = $this->getHash($newText); |
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134 | |||
135 | // Try to load existing entry |
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136 | $row = $this->gateway->loadRow($parentId, $newTextMD5); |
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137 | |||
138 | // If nothing was returned insert new entry |
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139 | if (empty($row)) { |
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140 | // Check for existing active location entry on this level and reuse it's id |
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141 | $existingLocationEntry = $this->gateway->loadAutogeneratedEntry($action, $parentId); |
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142 | if (!empty($existingLocationEntry)) { |
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143 | $cleanup = true; |
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144 | $newId = $existingLocationEntry['id']; |
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145 | } else { |
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146 | $newId = null; |
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147 | } |
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148 | |||
149 | $newId = $this->gateway->insertRow( |
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150 | array( |
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151 | 'id' => $newId, |
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152 | 'link' => $newId, |
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153 | 'parent' => $parentId, |
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154 | 'action' => $action, |
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155 | 'lang_mask' => $languageMask, |
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156 | 'text' => $newText, |
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157 | 'text_md5' => $newTextMD5, |
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158 | ) |
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159 | ); |
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160 | |||
161 | break; |
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162 | } |
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163 | |||
164 | // Row exists, check if it is reusable. There are 3 cases when this is possible: |
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165 | // 1. NOP entry |
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166 | // 2. existing location or custom alias entry |
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167 | // 3. history entry |
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168 | if ($row['action'] == 'nop:' || $row['action'] == $action || $row['is_original'] == 0) { |
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169 | // Check for existing location entry on this level, if it exists and it's id differs from reusable |
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170 | // entry id then reusable entry should be updated with the existing location entry id. |
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171 | // Note: existing location entry may be downgraded and relinked later, depending on its language. |
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172 | $existingLocationEntry = $this->gateway->loadAutogeneratedEntry($action, $parentId); |
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173 | $newId = $row['id']; |
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174 | if (!empty($existingLocationEntry)) { |
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175 | if ($existingLocationEntry['id'] != $row['id']) { |
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176 | $cleanup = true; |
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177 | $newId = $existingLocationEntry['id']; |
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178 | } else { |
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179 | // If we are reusing existing location entry merge existing language mask |
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180 | $languageMask |= ($row['lang_mask'] & ~1); |
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181 | } |
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182 | } |
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183 | $this->gateway->updateRow( |
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184 | $parentId, |
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185 | $newTextMD5, |
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186 | array( |
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187 | 'action' => $action, |
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188 | // In case when NOP row was reused |
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189 | 'action_type' => 'eznode', |
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190 | 'lang_mask' => $languageMask, |
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191 | // Updating text ensures that letter case changes are stored |
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192 | 'text' => $newText, |
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193 | // Set "id" and "link" for case when reusable entry is history |
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194 | 'id' => $newId, |
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195 | 'link' => $newId, |
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196 | // Entry should be active location entry (original and not alias). |
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197 | // Note: this takes care of taking over custom alias entry for the location on the same level |
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198 | // and with same name and action. |
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199 | 'alias_redirects' => 1, |
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200 | 'is_original' => 1, |
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201 | 'is_alias' => 0, |
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202 | ) |
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203 | ); |
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204 | |||
205 | break; |
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206 | } |
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207 | |||
208 | // If existing row is not reusable, increment $uniqueCounter and try again |
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209 | $uniqueCounter += 1; |
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210 | } |
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211 | |||
212 | if ($updatePathIdentificationString) { |
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213 | $this->locationGateway->updatePathIdentificationString( |
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214 | $locationId, |
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215 | $parentLocationId, |
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216 | $this->slugConverter->convert($newText, 'node_' . $locationId, 'urlalias_compat') |
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217 | ); |
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218 | } |
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219 | |||
220 | /* @var $newId */ |
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221 | /* @var $newTextMD5 */ |
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222 | // Note: cleanup does not touch custom and global entries |
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223 | if ($cleanup) { |
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224 | $this->gateway->cleanupAfterPublish($action, $languageId, $newId, $parentId, $newTextMD5); |
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225 | } |
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226 | } |
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227 | |||
228 | /** |
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229 | * Create a user chosen $alias pointing to $locationId in $languageCode. |
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230 | * |
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231 | * If $languageCode is null the $alias is created in the system's default |
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232 | * language. $alwaysAvailable makes the alias available in all languages. |
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233 | * |
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234 | * @param mixed $locationId |
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235 | * @param string $path |
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236 | * @param bool $forwarding |
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237 | * @param string $languageCode |
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238 | * @param bool $alwaysAvailable |
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239 | * |
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240 | * @return \eZ\Publish\SPI\Persistence\Content\UrlAlias |
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241 | */ |
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242 | public function createCustomUrlAlias($locationId, $path, $forwarding = false, $languageCode = null, $alwaysAvailable = false) |
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252 | |||
253 | /** |
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254 | * Create a user chosen $alias pointing to a resource in $languageCode. |
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255 | * This method does not handle location resources - if a user enters a location target |
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256 | * the createCustomUrlAlias method has to be used. |
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257 | * |
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258 | * If $languageCode is null the $alias is created in the system's default |
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259 | * language. $alwaysAvailable makes the alias available in all languages. |
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260 | * |
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261 | * @throws \eZ\Publish\API\Repository\Exceptions\ForbiddenException if the path already exists for the given language |
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262 | * |
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263 | * @param string $resource |
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264 | * @param string $path |
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265 | * @param bool $forwarding |
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266 | * @param string $languageCode |
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267 | * @param bool $alwaysAvailable |
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268 | * |
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269 | * @return \eZ\Publish\SPI\Persistence\Content\UrlAlias |
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270 | */ |
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271 | public function createGlobalUrlAlias($resource, $path, $forwarding = false, $languageCode = null, $alwaysAvailable = false) |
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281 | |||
282 | /** |
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283 | * Internal method for creating global or custom URL alias (these are handled in the same way). |
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284 | * |
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285 | * @throws \eZ\Publish\Core\Base\Exceptions\ForbiddenException if the path already exists for the given language |
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286 | * |
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287 | * @param string $action |
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288 | * @param string $path |
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289 | * @param bool $forward |
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290 | * @param string|null $languageCode |
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291 | * @param bool $alwaysAvailable |
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292 | * |
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293 | * @return \eZ\Publish\SPI\Persistence\Content\UrlAlias |
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294 | */ |
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295 | protected function createUrlAlias($action, $path, $forward, $languageCode, $alwaysAvailable) |
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370 | |||
371 | /** |
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372 | * Convenience method for inserting nop type row. |
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373 | * |
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374 | * @param mixed $parentId |
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375 | * @param string $text |
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376 | * @param string $textMD5 |
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377 | * |
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378 | * @return mixed |
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379 | */ |
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380 | protected function insertNopEntry($parentId, $text, $textMD5) |
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392 | |||
393 | /** |
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394 | * List of user generated or autogenerated url entries, pointing to $locationId. |
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395 | * |
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396 | * @param mixed $locationId |
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397 | * @param bool $custom if true the user generated aliases are listed otherwise the autogenerated |
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398 | * |
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399 | * @return \eZ\Publish\SPI\Persistence\Content\UrlAlias[] |
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400 | */ |
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401 | View Code Duplication | public function listURLAliasesForLocation($locationId, $custom = false) |
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410 | |||
411 | /** |
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412 | * List global aliases. |
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413 | * |
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414 | * @param string|null $languageCode |
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415 | * @param int $offset |
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416 | * @param int $limit |
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417 | * |
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418 | * @return \eZ\Publish\SPI\Persistence\Content\UrlAlias[] |
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419 | */ |
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420 | View Code Duplication | public function listGlobalURLAliases($languageCode = null, $offset = 0, $limit = -1) |
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429 | |||
430 | /** |
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431 | * Removes url aliases. |
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432 | * |
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433 | * Autogenerated aliases are not removed by this method. |
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434 | * |
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435 | * @param \eZ\Publish\SPI\Persistence\Content\UrlAlias[] $urlAliases |
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436 | * |
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437 | * @return bool |
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438 | */ |
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439 | public function removeURLAliases(array $urlAliases) |
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452 | |||
453 | /** |
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454 | * Looks up a url alias for the given url. |
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455 | * |
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456 | * @throws \eZ\Publish\API\Repository\Exceptions\NotFoundException |
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457 | * @throws \RuntimeException |
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458 | * @throws \eZ\Publish\Core\Base\Exceptions\NotFoundException |
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459 | * |
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460 | * @param string $url |
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461 | * |
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462 | * @return \eZ\Publish\SPI\Persistence\Content\UrlAlias |
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463 | */ |
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464 | public function lookup($url) |
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496 | |||
497 | /** |
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498 | * Loads URL alias by given $id. |
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499 | * |
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500 | * @throws \eZ\Publish\API\Repository\Exceptions\NotFoundException |
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501 | * |
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502 | * @param string $id |
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503 | * |
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504 | * @return \eZ\Publish\SPI\Persistence\Content\UrlAlias |
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505 | */ |
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506 | public function loadUrlAlias($id) |
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519 | |||
520 | /** |
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521 | * Swaps the content being referred to by two aliases. |
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522 | * |
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523 | * @param mixed $locationId1 |
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524 | * @param mixed $locationId2 |
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525 | * |
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526 | * @return bool |
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527 | */ |
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528 | public function swap($locationId1, $locationId2) |
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532 | |||
533 | /** |
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534 | * Notifies the underlying engine that a location has moved. |
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535 | * |
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536 | * This method triggers the change of the autogenerated aliases. |
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537 | * |
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538 | * @param mixed $locationId |
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539 | * @param mixed $oldParentId |
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540 | * @param mixed $newParentId |
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541 | */ |
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542 | public function locationMoved($locationId, $oldParentId, $newParentId) |
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562 | |||
563 | /** |
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564 | * Notifies the underlying engine that a location has moved. |
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565 | * |
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566 | * This method triggers the creation of the autogenerated aliases for the copied locations |
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567 | * |
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568 | * @param mixed $locationId |
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569 | * @param mixed $newLocationId |
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570 | * @param mixed $newParentId |
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571 | */ |
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572 | public function locationCopied($locationId, $newLocationId, $newParentId) |
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586 | |||
587 | /** |
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588 | * Returns possibly corrected alias id for given $locationId !! For use as parent id in logic. |
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589 | * |
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590 | * First level entries must have parent id set to 0 instead of their parent location alias id. |
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591 | * There are two cases when alias id needs to be corrected: |
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592 | * 1) location is special location without URL alias (location with id=1 in standard installation) |
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593 | * 2) location is site root location, having special root entry in the ezurlalias_ml table (location with id=2 |
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594 | * in standard installation) |
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595 | * |
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596 | * @param mixed $locationId |
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597 | * |
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598 | * @return mixed |
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599 | */ |
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600 | protected function getRealAliasId($locationId) |
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618 | |||
619 | /** |
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620 | * Recursively copies aliases from old parent under new parent. |
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621 | * |
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622 | * @param array $actionMap |
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623 | * @param mixed $oldParentAliasId |
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624 | * @param mixed $newParentAliasId |
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625 | */ |
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626 | protected function copySubtree($actionMap, $oldParentAliasId, $newParentAliasId) |
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650 | |||
651 | /** |
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652 | * @param mixed $oldParentId |
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653 | * @param mixed $newParentId |
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654 | * |
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655 | * @return array |
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656 | */ |
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657 | protected function getCopiedLocationsMap($oldParentId, $newParentId) |
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669 | |||
670 | /** |
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671 | * Notifies the underlying engine that a location was deleted or moved to trash. |
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672 | * |
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673 | * @param mixed $locationId |
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674 | */ |
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675 | public function locationDeleted($locationId) |
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682 | |||
683 | /** |
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684 | * Recursively removes aliases by given $id and $action. |
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685 | * |
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686 | * $original parameter is used to limit removal of moved Location aliases to history entries only. |
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687 | * |
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688 | * @param mixed $id |
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689 | * @param string $action |
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690 | * @param mixed $original |
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691 | */ |
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692 | protected function removeSubtree($id, $action, $original) |
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712 | |||
713 | /** |
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714 | * @param string $text |
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715 | * |
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716 | * @return string |
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717 | */ |
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718 | protected function getHash($text) |
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722 | } |
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723 |
Our type inference engine has found a suspicous assignment of a value to a property. This check raises an issue when a value that can be of a given class or a super-class is assigned to a property that is type hinted more strictly.
Either this assignment is in error or an instanceof check should be added for that assignment.