Complex classes like UserRelationTrait 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 UserRelationTrait, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 52 | trait UserRelationTrait |
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| 53 | { |
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| 54 | use mb, |
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| 55 | MutualTrait { |
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| 56 | mb::addBlame as addGroup; |
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| 57 | mb::createBlame as createGroup; |
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| 58 | mb::addOrCreateBlame as addOrCreateGroup; |
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| 59 | mb::removeBlame as removeGroup; |
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| 60 | mb::removeAllBlames as removeAllGroups; |
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| 61 | mb::getBlame as getGroup; |
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| 62 | mb::getOrCreateBlame as getOrCreateGroup; |
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| 63 | mb::getBlameds as getGroupMembers; |
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| 64 | mb::getBlameGuids as getGroupGuids; |
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| 65 | mb::setBlameGuids as setGroupGuids; |
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| 66 | mb::getAllBlames as getAllGroups; |
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| 67 | mb::getNonBlameds as getNonGroupMembers; |
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| 68 | mb::getBlamesCount as getGroupsCount; |
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| 69 | mb::getMultipleBlameableAttributeRules as getGroupsRules; |
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| 70 | } |
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| 71 | |||
| 72 | /** |
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| 73 | * @var string |
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| 74 | */ |
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| 75 | public $remarkAttribute = 'remark'; |
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| 76 | public static $relationSingle = 0; |
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| 77 | public static $relationMutual = 1; |
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| 78 | public $relationType = 1; |
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| 79 | public static $relationTypes = [ |
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| 80 | 0 => 'Single', |
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| 81 | 1 => 'Mutual', |
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| 82 | ]; |
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| 83 | |||
| 84 | /** |
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| 85 | * @var string the attribute name of which determines the relation type. |
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| 86 | */ |
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| 87 | public $mutualTypeAttribute = 'type'; |
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| 88 | public static $mutualTypeNormal = 0x00; |
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| 89 | public static $mutualTypeSuspend = 0x01; |
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| 90 | |||
| 91 | /** |
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| 92 | * @var array Mutual types. |
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| 93 | */ |
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| 94 | public static $mutualTypes = [ |
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| 95 | 0x00 => 'Normal', |
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| 96 | 0x01 => 'Suspend', |
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| 97 | ]; |
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| 98 | |||
| 99 | /** |
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| 100 | * @var string the attribute name of which determines the `favorite` field. |
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| 101 | */ |
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| 102 | public $favoriteAttribute = 'favorite'; |
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| 103 | |||
| 104 | /** |
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| 105 | * Permit to build self relation. |
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| 106 | * @var boolean |
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| 107 | */ |
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| 108 | public $relationSelf = false; |
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| 109 | |||
| 110 | /** |
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| 111 | * Get whether this relation is favorite or not. |
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| 112 | * @return boolean |
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| 113 | */ |
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| 114 | 1 | public function getIsFavorite() |
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| 119 | |||
| 120 | /** |
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| 121 | * Set favorite. |
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| 122 | * @param boolean $fav |
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| 123 | */ |
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| 124 | 1 | public function setIsFavorite($fav) |
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| 129 | |||
| 130 | /** |
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| 131 | * @inheritdoc |
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| 132 | */ |
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| 133 | 24 | public function rules() |
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| 137 | |||
| 138 | /** |
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| 139 | * Validation rules associated with user relation. |
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| 140 | * @return array rules. |
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| 141 | */ |
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| 142 | 24 | public function getUserRelationRules() |
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| 143 | { |
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| 144 | 24 | $rules = []; |
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| 145 | 24 | if ($this->relationType == static::$relationMutual) { |
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| 146 | $rules = [ |
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| 147 | 6 | [[$this->mutualTypeAttribute], 'in', 'range' => array_keys(static::$mutualTypes)], |
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| 148 | 6 | [[$this->mutualTypeAttribute], 'default', 'value' => static::$mutualTypeNormal], |
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| 149 | ]; |
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| 150 | } |
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| 151 | 24 | return array_merge($rules, $this->getRemarkRules(), $this->getFavoriteRules(), $this->getGroupsRules(), $this->getOtherGuidRules()); |
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| 152 | } |
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| 153 | |||
| 154 | /** |
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| 155 | * Get remark. |
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| 156 | * @return string remark. |
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| 157 | */ |
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| 158 | 1 | public function getRemark() |
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| 159 | { |
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| 160 | 1 | $remarkAttribute = $this->remarkAttribute; |
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| 161 | 1 | return (is_string($remarkAttribute) && !empty($remarkAttribute)) ? $this->$remarkAttribute : null; |
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| 162 | } |
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| 163 | |||
| 164 | /** |
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| 165 | * Set remark. |
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| 166 | * @param string $remark |
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| 167 | * @return string remark. |
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| 168 | */ |
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| 169 | 1 | public function setRemark($remark) |
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| 170 | { |
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| 171 | 1 | $remarkAttribute = $this->remarkAttribute; |
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| 172 | 1 | return (is_string($remarkAttribute) && !empty($remarkAttribute)) ? $this->$remarkAttribute = $remark : null; |
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| 173 | } |
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| 174 | |||
| 175 | /** |
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| 176 | * Validation rules associated with remark attribute. |
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| 177 | * @return array rules. |
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| 178 | */ |
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| 179 | 24 | public function getRemarkRules() |
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| 186 | |||
| 187 | /** |
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| 188 | * Validation rules associated with favorites attribute. |
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| 189 | * @return array rules. |
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| 190 | */ |
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| 191 | 24 | public function getFavoriteRules() |
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| 198 | |||
| 199 | /** |
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| 200 | * Validation rules associated with other guid attribute. |
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| 201 | * @return array rules. |
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| 202 | */ |
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| 203 | 24 | public function getOtherGuidRules() |
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| 210 | |||
| 211 | /** |
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| 212 | * Attach events associated with user relation. |
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| 213 | */ |
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| 214 | 27 | public function initUserRelationEvents() |
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| 224 | |||
| 225 | /** |
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| 226 | * Get opposite relation against self. |
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| 227 | * @return static |
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| 228 | */ |
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| 229 | 1 | public function getOpposite() |
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| 236 | |||
| 237 | /** |
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| 238 | * Check whether the initiator is followed by recipient. |
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| 239 | * @param BaseUserModel $initiator |
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| 240 | * @param BaseUserModel $recipient |
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| 241 | * @return boolean |
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| 242 | */ |
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| 243 | 4 | public static function isFollowed($initiator, $recipient) |
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| 247 | |||
| 248 | /** |
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| 249 | * Check whether the initiator is following recipient. |
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| 250 | * @param BaseUserModel $initiator |
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| 251 | * @param BaseUserModel $recipient |
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| 252 | * @return boolean |
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| 253 | */ |
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| 254 | 4 | public static function isFollowing($initiator, $recipient) |
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| 258 | |||
| 259 | /** |
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| 260 | * Check whether the initiator is following and followed by recipient mutually (Single Relation). |
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| 261 | * Or check whether the initiator and recipient are friend whatever the mutual type is normal or suspend. |
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| 262 | * @param BaseUserModel $initiator |
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| 263 | * @param BaseUserModel $recipient |
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| 264 | * @return boolean |
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| 265 | */ |
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| 266 | 3 | public static function isMutual($initiator, $recipient) |
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| 270 | |||
| 271 | /** |
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| 272 | * Check whether the initiator is following and followed by recipient mutually (Single Relation). |
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| 273 | * Or check whether the initiator and recipient are friend if the mutual type is normal. |
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| 274 | * @param BaseUserModel $initiator |
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| 275 | * @param BaseUserModel $recipient |
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| 276 | * @return boolean |
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| 277 | */ |
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| 278 | 6 | public static function isFriend($initiator, $recipient) |
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| 293 | |||
| 294 | /** |
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| 295 | * Build new or return existed suspend mutual relation, or return null if |
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| 296 | * current type is not mutual. |
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| 297 | * @see buildRelation() |
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| 298 | * @param BaseUserModel|string $user Initiator or its GUID. |
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| 299 | * @param BaseUserModel|string $other Recipient or its GUID. |
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| 300 | * @return static The relation will be |
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| 301 | * given if exists, or return a new relation. |
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| 302 | */ |
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| 303 | 9 | public static function buildSuspendRelation($user, $other) |
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| 312 | |||
| 313 | /** |
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| 314 | * Build new or return existed normal relation. |
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| 315 | * The status of mutual relation will be changed to normal if it is not. |
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| 316 | * @see buildRelation() |
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| 317 | * @param BaseUserModel|string $user Initiator or its GUID. |
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| 318 | * @param BaseUserModel|string $other Recipient or its GUID. |
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| 319 | * @return static The relation will be |
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| 320 | * given if exists, or return a new relation. |
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| 321 | */ |
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| 322 | 27 | public static function buildNormalRelation($user, $other) |
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| 333 | |||
| 334 | /** |
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| 335 | * Transform relation from suspend to normal. |
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| 336 | * Note: You should ensure the relation model is not new one. |
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| 337 | * @param static $relation |
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| 338 | * @return boolean |
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| 339 | */ |
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| 340 | 1 | public static function transformSuspendToNormal($relation) |
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| 348 | |||
| 349 | /** |
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| 350 | * Revert relation from normal to suspend. |
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| 351 | * Note: You should ensure the relation model is not new one. |
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| 352 | * @param static $relation |
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| 353 | * @return boolean |
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| 354 | */ |
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| 355 | 1 | public static function revertNormalToSuspend($relation) |
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| 363 | |||
| 364 | /** |
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| 365 | * Build new or return existed relation between initiator and recipient. |
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| 366 | * If relation between initiator and recipient is not found, new relation will |
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| 367 | * be built. If initiator and recipient are the same one and it is not allowed |
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| 368 | * to build self relation, null will be given. |
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| 369 | * If you want to know whether the relation exists, you can check the return |
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| 370 | * value of `getIsNewRecord()` method. |
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| 371 | * @param BaseUserModel|string $user Initiator or its GUID. |
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| 372 | * @param BaseUserModel|string $other Recipient or its GUID. |
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| 373 | * @return static The relation will be |
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| 374 | * given if exists, or return a new relation. Or return null if not allowed |
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| 375 | * to build self relation, |
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| 376 | */ |
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| 377 | 27 | protected static function buildRelation($user, $other) |
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| 400 | |||
| 401 | /** |
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| 402 | * Build opposite relation throughout the current relation. The opposite |
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| 403 | * relation will be given if existed. |
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| 404 | * @param static $relation |
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| 405 | * @return static |
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| 406 | */ |
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| 407 | 6 | protected static function buildOppositeRelation($relation) |
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| 422 | |||
| 423 | /** |
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| 424 | * Get mutual type. |
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| 425 | * @return integer |
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| 426 | */ |
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| 427 | 6 | public function getMutualType() |
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| 435 | |||
| 436 | /** |
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| 437 | * Set mutual type. |
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| 438 | * @param integer $type |
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| 439 | * @return integer |
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| 440 | */ |
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| 441 | 8 | protected function setMutualType($type) |
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| 452 | |||
| 453 | /** |
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| 454 | * Insert relation, the process is placed in a transaction. |
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| 455 | * Note: This feature only support relational databases and skip all errors. |
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| 456 | * If you don't want to use transaction or database doesn't support it, |
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| 457 | * please use `save()` directly. |
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| 458 | * @param static $relation |
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| 459 | * @param Connection $db |
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| 460 | * @return boolean |
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| 461 | * @throws InvalidValueException |
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| 462 | * @throws InvalidConfigException |
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| 463 | * @throws IntegrityException |
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| 464 | */ |
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| 465 | public static function insertRelation($relation, Connection $db = null) |
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| 492 | |||
| 493 | /** |
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| 494 | * Remove myself. |
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| 495 | * @return integer|false The number of relations removed, or false if the remove |
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| 496 | * is unsuccessful for some reason. Note that it is possible the number of relations |
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| 497 | * removed is 0, even though the remove execution is successful. |
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| 498 | */ |
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| 499 | 27 | public function remove() |
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| 503 | |||
| 504 | /** |
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| 505 | * Remove first relation between initiator(s) and recipient(s). |
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| 506 | * @param BaseUserModel|string|array $user Initiator or its guid, or array of them. |
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| 507 | * @param BaseUserModel|string|array $other Recipient or its guid, or array of them. |
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| 508 | * @return integer|false The number of relations removed. |
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| 509 | */ |
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| 510 | 1 | public static function removeOneRelation($user, $other) |
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| 514 | |||
| 515 | /** |
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| 516 | * Remove all relations between initiator(s) and recipient(s). |
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| 517 | * @param BaseUserModel|string|array $user Initiator or its guid, or array of them. |
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| 518 | * @param BaseUserModel|string|array $other Recipient or its guid, or array of them. |
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| 519 | * @return integer The number of relations removed. |
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| 520 | */ |
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| 521 | 9 | public static function removeAllRelations($user, $other) |
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| 528 | |||
| 529 | /** |
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| 530 | * Get first relation between initiator(s) and recipient(s). |
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| 531 | * @param BaseUserModel|string|array $user Initiator or its guid, or array of them. |
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| 532 | * @param BaseUserModel|string|array $other Recipient or its guid, or array of them. |
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| 533 | * @return static |
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| 534 | */ |
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| 535 | 4 | public static function findOneRelation($user, $other) |
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| 539 | |||
| 540 | /** |
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| 541 | * Get first opposite relation between initiator(s) and recipient(s). |
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| 542 | * @param BaseUserModel|string $user Initiator or its guid, or array of them. |
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| 543 | * @param BaseUserModel|string $other Recipient or its guid, or array of them. |
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| 544 | * @return static |
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| 545 | */ |
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| 546 | 1 | public static function findOneOppositeRelation($user, $other) |
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| 550 | |||
| 551 | /** |
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| 552 | * Get user's or users' all relations, or by specified groups. |
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| 553 | * @param BaseUserModel|string|array $user Initiator or its GUID, or Initiators or their GUIDs. |
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| 554 | * @param BaseUserRelationGroupModel|string|array|null $groups UserRelationGroup |
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| 555 | * or its guid, or array of them. If you do not want to delimit the groups, please assign null. |
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| 556 | * @return array all eligible relations |
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| 557 | */ |
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| 558 | 1 | public static function findOnesAllRelations($user, $groups = null) |
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| 562 | |||
| 563 | /** |
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| 564 | * Initialize groups attribute. |
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| 565 | * @param ModelEvent $event |
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| 566 | */ |
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| 567 | 27 | public function onInitGroups($event) |
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| 572 | |||
| 573 | /** |
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| 574 | * Initialize remark attribute. |
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| 575 | * @param ModelEvent $event |
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| 576 | */ |
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| 577 | 27 | public function onInitRemark($event) |
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| 583 | |||
| 584 | /** |
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| 585 | * The event triggered after insert new relation. |
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| 586 | * The opposite relation should be inserted without triggering events |
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| 587 | * simultaneously after new relation inserted, |
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| 588 | * @param ModelEvent $event |
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| 589 | * @throws IntegrityException throw if insert failed. |
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| 590 | */ |
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| 591 | 24 | public function onInsertRelation($event) |
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| 604 | |||
| 605 | /** |
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| 606 | * The event triggered after update relation. |
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| 607 | * The opposite relation should be updated without triggering events |
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| 608 | * simultaneously after existed relation removed. |
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| 609 | * @param ModelEvent $event |
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| 610 | * @throw IntegrityException throw if update failed. |
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| 611 | */ |
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| 612 | 4 | public function onUpdateRelation($event) |
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| 625 | |||
| 626 | /** |
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| 627 | * The event triggered after delete relation. |
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| 628 | * The opposite relation should be deleted without triggering events |
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| 629 | * simultaneously after existed relation removed. |
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| 630 | * @param ModelEvent $event |
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| 631 | */ |
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| 632 | 27 | public function onDeleteRelation($event) |
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| 643 | } |
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| 644 |
This check looks for methods that are used by a trait but not required by it.
To illustrate, let’s look at the following code example
The trait
Idableprovides a methodequalsIdthat in turn relies on the methodgetId(). If this method does not exist on a class mixing in this trait, the method will fail.Adding the
getId()as an abstract method to the trait will make sure it is available.