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:
| 1 | <?php |
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| 42 | class MembersService { |
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| 43 | |||
| 44 | /** @var string */ |
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| 45 | private $userId; |
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| 46 | |||
| 47 | /** @var IL10N */ |
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| 48 | private $l10n; |
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| 49 | |||
| 50 | /** @var IUserManager */ |
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| 51 | private $userManager; |
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| 52 | |||
| 53 | /** @var ConfigService */ |
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| 54 | private $configService; |
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| 55 | |||
| 56 | /** @var CirclesMapper */ |
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| 57 | private $dbCircles; |
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| 58 | |||
| 59 | /** @var MembersMapper */ |
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| 60 | private $dbMembers; |
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| 61 | |||
| 62 | /** @var EventsService */ |
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| 63 | private $eventsService; |
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| 64 | |||
| 65 | /** @var MiscService */ |
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| 66 | private $miscService; |
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| 67 | |||
| 68 | View Code Duplication | public function __construct( |
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| 87 | |||
| 88 | |||
| 89 | /** |
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| 90 | * @param $circleId |
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| 91 | * @param $name |
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| 92 | * |
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| 93 | * @return array |
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| 94 | * @throws \Exception |
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| 95 | */ |
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| 96 | View Code Duplication | public function addMember($circleId, $name) { |
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| 118 | |||
| 119 | |||
| 120 | /** |
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| 121 | * @param int $circleId |
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| 122 | * @param string $groupId |
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| 123 | * |
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| 124 | * @return array |
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| 125 | * @throws \Exception |
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| 126 | */ |
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| 127 | public function importMembersFromGroup($circleId, $groupId) { |
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| 128 | |||
| 129 | try { |
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| 130 | $circle = $this->dbCircles->getDetailsFromCircle($circleId, $this->userId); |
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| 131 | $this->dbMembers->getMemberFromCircle($circleId, $this->userId) |
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| 132 | ->hasToBeModerator(); |
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| 133 | } catch (\Exception $e) { |
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| 134 | throw $e; |
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| 135 | } |
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| 136 | |||
| 137 | $group = \OC::$server->getGroupManager() |
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| 138 | ->get($groupId); |
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| 139 | if ($group === null) { |
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| 140 | throw new GroupDoesNotExistException('This group does not exist'); |
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| 141 | } |
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| 142 | |||
| 143 | foreach ($group->getUsers() as $user) { |
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| 144 | try { |
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| 145 | $member = $this->getFreshNewMember($circleId, $user->getUID()); |
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| 146 | |||
| 147 | $member->inviteToCircle($circle->getType()); |
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| 148 | $this->dbMembers->editMember($member); |
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| 149 | |||
| 150 | $this->eventsService->onMemberNew($circle, $member); |
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| 151 | } catch (MemberAlreadyExistsException $e) { |
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| 152 | } catch (\Exception $e) { |
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| 153 | throw $e; |
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| 154 | } |
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| 155 | } |
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| 156 | |||
| 157 | return $this->dbMembers->getMembersFromCircle($circleId, $circle->getUser()); |
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| 158 | } |
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| 159 | |||
| 160 | |||
| 161 | /** |
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| 162 | * getMember(); |
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| 163 | * |
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| 164 | * Will return any data of a user related to a circle (as a Member). User can be a 'non-member' |
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| 165 | * |
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| 166 | * @param $circleId |
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| 167 | * @param $userId |
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| 168 | * |
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| 169 | * @return Member |
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| 170 | * @throws \Exception |
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| 171 | */ |
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| 172 | public function getMember($circleId, $userId) { |
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| 184 | |||
| 185 | |||
| 186 | /** |
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| 187 | * Check if a fresh member can be generated (by addMember) |
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| 188 | * |
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| 189 | * @param $circleId |
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| 190 | * @param $name |
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| 191 | * |
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| 192 | * @return null|Member |
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| 193 | * @throws MemberAlreadyExistsException |
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| 194 | * @throws NoUserException |
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| 195 | */ |
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| 196 | private function getFreshNewMember($circleId, $name) { |
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| 218 | |||
| 219 | |||
| 220 | /** |
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| 221 | * return if member already exists |
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| 222 | * |
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| 223 | * @param Member $member |
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| 224 | * |
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| 225 | * @return bool |
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| 226 | */ |
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| 227 | private function memberAlreadyExist($member) { |
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| 233 | |||
| 234 | |||
| 235 | /** |
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| 236 | * @param int $circleId |
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| 237 | * @param string $name |
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| 238 | * @param int $level |
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| 239 | * |
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| 240 | * @return array |
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| 241 | * @throws \Exception |
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| 242 | */ |
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| 243 | public function levelMember($circleId, $name, $level) { |
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| 244 | |||
| 245 | $level = (int)$level; |
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| 246 | try { |
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| 247 | $circle = $this->dbCircles->getDetailsFromCircle($circleId, $this->userId); |
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| 248 | if ($circle->getType() === Circle::CIRCLES_PERSONAL) { |
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| 249 | throw new CircleTypeNotValid( |
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| 250 | $this->l10n->t('You cannot edit level in a personal circle') |
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| 251 | ); |
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| 252 | } |
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| 253 | |||
| 254 | $member = $this->dbMembers->getMemberFromCircle($circle->getId(), $name); |
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| 255 | if ($member->getLevel() !== $level) { |
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| 256 | if ($level === Member::LEVEL_OWNER) { |
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| 257 | $this->switchOwner($circle, $member); |
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| 258 | } else { |
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| 259 | $this->editMemberLevel($circle, $member, $level); |
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| 260 | } |
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| 261 | |||
| 262 | $this->eventsService->onMemberLevel($circle, $member); |
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| 263 | } |
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| 264 | |||
| 265 | return $this->dbMembers->getMembersFromCircle($circleId, $circle->getUser()); |
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| 266 | } catch (\Exception $e) { |
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| 267 | throw $e; |
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| 268 | } |
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| 269 | |||
| 270 | } |
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| 271 | |||
| 272 | |||
| 273 | /** |
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| 274 | * @param Circle $circle |
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| 275 | * @param Member $member |
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| 276 | * @param $level |
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| 277 | * |
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| 278 | * @throws \Exception |
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| 279 | */ |
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| 280 | View Code Duplication | private function editMemberLevel(Circle $circle, Member &$member, $level) { |
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| 281 | try { |
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| 282 | $isMod = $this->dbMembers->getMemberFromCircle($circle->getId(), $this->userId); |
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| 283 | $isMod->hasToBeModerator(); |
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| 284 | $isMod->hasToBeHigherLevel($level); |
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| 285 | |||
| 286 | $member->hasToBeMember(); |
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| 287 | $member->cantBeOwner(); |
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| 288 | $isMod->hasToBeHigherLevel($member->getLevel()); |
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| 289 | |||
| 290 | $member->setLevel($level); |
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| 291 | $this->dbMembers->editMember($member); |
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| 292 | } catch (\Exception $e) { |
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| 293 | throw $e; |
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| 294 | } |
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| 295 | |||
| 296 | } |
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| 297 | |||
| 298 | /** |
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| 299 | * @param Circle $circle |
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| 300 | * @param Member $member |
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| 301 | * |
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| 302 | * @throws \Exception |
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| 303 | */ |
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| 304 | public function switchOwner(Circle $circle, Member &$member) { |
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| 320 | |||
| 321 | |||
| 322 | /** |
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| 323 | * @param $circleId |
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| 324 | * @param $name |
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| 325 | * |
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| 326 | * @return array |
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| 327 | * @throws \Exception |
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| 328 | */ |
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| 329 | public function removeMember($circleId, $name) { |
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| 352 | |||
| 353 | |||
| 354 | /** |
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| 355 | * When a user is removed, remove him from all Circles |
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| 356 | * |
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| 357 | * @param $userId |
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| 358 | */ |
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| 359 | public function onUserRemoved($userId) { |
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| 362 | |||
| 363 | |||
| 364 | } |
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: