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| 1 | <?php |
| 2 | |
| 3 | namespace GrowthExperiments\Mentorship\Store; |
| 4 | |
| 5 | use InvalidArgumentException; |
| 6 | use MediaWiki\User\UserIdentity; |
| 7 | use Psr\Log\LoggerAwareInterface; |
| 8 | use Psr\Log\LoggerAwareTrait; |
| 9 | use Psr\Log\NullLogger; |
| 10 | use Wikimedia\LightweightObjectStore\ExpirationAwareness; |
| 11 | use Wikimedia\ObjectCache\WANObjectCache; |
| 12 | use Wikimedia\Rdbms\DBAccessObjectUtils; |
| 13 | use Wikimedia\Rdbms\IDBAccessObject; |
| 14 | |
| 15 | abstract class MentorStore implements ExpirationAwareness, LoggerAwareInterface { |
| 16 | use LoggerAwareTrait; |
| 17 | |
| 18 | /** @var string */ |
| 19 | public const ROLE_PRIMARY = 'primary'; |
| 20 | |
| 21 | /** @var string */ |
| 22 | public const ROLE_BACKUP = 'backup'; |
| 23 | |
| 24 | /** @var string[] */ |
| 25 | public const ROLES = [ |
| 26 | self::ROLE_PRIMARY, |
| 27 | self::ROLE_BACKUP |
| 28 | ]; |
| 29 | |
| 30 | /** @var WANObjectCache */ |
| 31 | protected WANObjectCache $wanCache; |
| 32 | /** @var array Cache key =>¨value; custom in-process cache */ |
| 33 | protected array $inProcessCache = []; |
| 34 | /** @var bool */ |
| 35 | protected bool $wasPosted; |
| 36 | |
| 37 | /** |
| 38 | * @param WANObjectCache $wanCache |
| 39 | * @param bool $wasPosted |
| 40 | */ |
| 41 | public function __construct( |
| 42 | WANObjectCache $wanCache, |
| 43 | bool $wasPosted |
| 44 | ) { |
| 45 | $this->wanCache = $wanCache; |
| 46 | $this->wasPosted = $wasPosted; |
| 47 | |
| 48 | $this->setLogger( new NullLogger() ); |
| 49 | } |
| 50 | |
| 51 | /** |
| 52 | * Helper to generate cache key for a mentee |
| 53 | * @param UserIdentity $user Mentee's username |
| 54 | * @param string $mentorRole |
| 55 | * @return string Cache key |
| 56 | */ |
| 57 | protected function makeLoadMentorCacheKey( |
| 58 | UserIdentity $user, |
| 59 | string $mentorRole |
| 60 | ): string { |
| 61 | return $this->wanCache->makeKey( |
| 62 | 'GrowthExperiments', |
| 63 | 'MentorStore', __CLASS__, |
| 64 | 'Mentee', $user->getId(), |
| 65 | 'Mentor', $mentorRole |
| 66 | ); |
| 67 | } |
| 68 | |
| 69 | /** |
| 70 | * Invalidates mentor cache for loadMentorUser |
| 71 | * @param UserIdentity $user Who will have their cache invalidated |
| 72 | * @param string $mentorRole |
| 73 | */ |
| 74 | protected function invalidateMentorCache( UserIdentity $user, string $mentorRole ): void { |
| 75 | $key = $this->makeLoadMentorCacheKey( $user, $mentorRole ); |
| 76 | $this->wanCache->delete( |
| 77 | $key |
| 78 | ); |
| 79 | unset( $this->inProcessCache[$key] ); |
| 80 | } |
| 81 | |
| 82 | /** |
| 83 | * Code helper for validating mentor type |
| 84 | * |
| 85 | * @param string $mentorRole |
| 86 | * @return bool True when valid, false otherwise |
| 87 | */ |
| 88 | private function validateMentorRole( string $mentorRole ): bool { |
| 89 | return in_array( $mentorRole, self::ROLES ); |
| 90 | } |
| 91 | |
| 92 | /** |
| 93 | * Get the mentor assigned to this user, if it exists. |
| 94 | * @param UserIdentity $mentee |
| 95 | * @param string $mentorRole One of MentorStore::ROLE_* constants |
| 96 | * @param int $flags bit field, see IDBAccessObject::READ_XXX |
| 97 | * @return UserIdentity|null |
| 98 | */ |
| 99 | public function loadMentorUser( |
| 100 | UserIdentity $mentee, |
| 101 | string $mentorRole, |
| 102 | $flags = IDBAccessObject::READ_NORMAL |
| 103 | ): ?UserIdentity { |
| 104 | if ( !$this->validateMentorRole( $mentorRole ) ) { |
| 105 | throw new InvalidArgumentException( "Invalid \$mentorRole passed: $mentorRole" ); |
| 106 | } |
| 107 | |
| 108 | if ( DBAccessObjectUtils::hasFlags( $flags, IDBAccessObject::READ_LATEST ) ) { |
| 109 | $this->invalidateMentorCache( $mentee, $mentorRole ); |
| 110 | } |
| 111 | |
| 112 | $cacheKey = $this->makeLoadMentorCacheKey( $mentee, $mentorRole ); |
| 113 | if ( isset( $this->inProcessCache[$cacheKey] ) ) { |
| 114 | return $this->inProcessCache[$cacheKey]; |
| 115 | } |
| 116 | |
| 117 | $res = $this->wanCache->getWithSetCallback( |
| 118 | $cacheKey, |
| 119 | self::TTL_DAY, |
| 120 | function () use ( $mentee, $mentorRole, $flags ) { |
| 121 | return $this->loadMentorUserUncached( $mentee, $mentorRole, $flags ); |
| 122 | } |
| 123 | ); |
| 124 | $this->inProcessCache[$cacheKey] = $res; |
| 125 | return $res; |
| 126 | } |
| 127 | |
| 128 | /** |
| 129 | * Load mentor user with no cache |
| 130 | * |
| 131 | * @param UserIdentity $mentee |
| 132 | * @param string $mentorRole One of MentorStore::ROLE_* constants |
| 133 | * @param int $flags bit field, see IDBAccessObject::READ_XXX |
| 134 | * @return UserIdentity|null |
| 135 | */ |
| 136 | abstract protected function loadMentorUserUncached( |
| 137 | UserIdentity $mentee, |
| 138 | string $mentorRole, |
| 139 | $flags |
| 140 | ): ?UserIdentity; |
| 141 | |
| 142 | /** |
| 143 | * Return mentees who are mentored by given mentor |
| 144 | * |
| 145 | * @param UserIdentity $mentor |
| 146 | * @param string $mentorRole |
| 147 | * @param bool $includeHiddenUsers |
| 148 | * @param bool $includeInactiveUsers |
| 149 | * @param int $flags |
| 150 | * @return UserIdentity[] |
| 151 | */ |
| 152 | abstract public function getMenteesByMentor( |
| 153 | UserIdentity $mentor, |
| 154 | string $mentorRole, |
| 155 | bool $includeHiddenUsers = false, |
| 156 | bool $includeInactiveUsers = true, |
| 157 | int $flags = 0 |
| 158 | ): array; |
| 159 | |
| 160 | /** |
| 161 | * Checks whether a mentor has any mentees assigned |
| 162 | * |
| 163 | * @param UserIdentity $mentor |
| 164 | * @param string $mentorRole |
| 165 | * @param bool $includeHiddenUsers Deprecated (and ignored) since 1.43 |
| 166 | * @param int $flags |
| 167 | * @return bool |
| 168 | */ |
| 169 | abstract public function hasAnyMentees( |
| 170 | UserIdentity $mentor, |
| 171 | string $mentorRole, |
| 172 | bool $includeHiddenUsers = true, |
| 173 | int $flags = 0 |
| 174 | ): bool; |
| 175 | |
| 176 | /** |
| 177 | * Assign a mentor to this user, overriding any previous assignments. |
| 178 | * |
| 179 | * This method can be safely called on GET requests. |
| 180 | * |
| 181 | * The actual logic for changing mentor is in setMentorForUserInternal, this method |
| 182 | * only validates mentor type and calls the internal one. |
| 183 | * |
| 184 | * @param UserIdentity $mentee |
| 185 | * @param UserIdentity|null $mentor Null to drop the relationship |
| 186 | * @param string $mentorRole One of MentorStore::ROLE_* constants |
| 187 | */ |
| 188 | public function setMentorForUser( |
| 189 | UserIdentity $mentee, |
| 190 | ?UserIdentity $mentor, |
| 191 | string $mentorRole |
| 192 | ): void { |
| 193 | if ( !$this->validateMentorRole( $mentorRole ) ) { |
| 194 | throw new InvalidArgumentException( "Invalid \$mentorRole passed: $mentorRole" ); |
| 195 | } |
| 196 | |
| 197 | $this->setMentorForUserInternal( $mentee, $mentor, $mentorRole ); |
| 198 | |
| 199 | $this->invalidateMentorCache( $mentee, $mentorRole ); |
| 200 | $this->invalidateIsMenteeActive( $mentee ); |
| 201 | |
| 202 | // Set the mentor in the in-process cache |
| 203 | $this->inProcessCache[$this->makeLoadMentorCacheKey( $mentee, $mentorRole )] = $mentor; |
| 204 | } |
| 205 | |
| 206 | /** |
| 207 | * Actual logic for setting a mentor |
| 208 | * @param UserIdentity $mentee |
| 209 | * @param UserIdentity|null $mentor Set to null to drop the relationship |
| 210 | * @param string $mentorRole |
| 211 | */ |
| 212 | abstract protected function setMentorForUserInternal( |
| 213 | UserIdentity $mentee, |
| 214 | ?UserIdentity $mentor, |
| 215 | string $mentorRole |
| 216 | ): void; |
| 217 | |
| 218 | /** |
| 219 | * Drop mentor/mentee relationship for a given user |
| 220 | * |
| 221 | * @param UserIdentity $mentee |
| 222 | */ |
| 223 | public function dropMenteeRelationship( UserIdentity $mentee ): void { |
| 224 | foreach ( self::ROLES as $role ) { |
| 225 | $this->setMentorForUser( $mentee, null, $role ); |
| 226 | } |
| 227 | } |
| 228 | |
| 229 | /** |
| 230 | * Is an user considered a mentee? |
| 231 | * |
| 232 | * Equivalent to "Do they have a primary mentor assigned?" |
| 233 | * |
| 234 | * @param UserIdentity $user |
| 235 | * @param int $flags |
| 236 | * @return bool |
| 237 | */ |
| 238 | public function isMentee( |
| 239 | UserIdentity $user, |
| 240 | int $flags = IDBAccessObject::READ_NORMAL |
| 241 | ): bool { |
| 242 | return $this->loadMentorUser( |
| 243 | $user, |
| 244 | self::ROLE_PRIMARY, |
| 245 | $flags |
| 246 | ) !== null; |
| 247 | } |
| 248 | |
| 249 | /** |
| 250 | * Make cache key for isMenteeActive() |
| 251 | * |
| 252 | * @param UserIdentity $user |
| 253 | * @return string |
| 254 | */ |
| 255 | private function makeIsMenteeActiveCacheKey( UserIdentity $user ): string { |
| 256 | return $this->wanCache->makeKey( |
| 257 | 'GrowthExperiments', |
| 258 | 'MentorStore', __CLASS__, |
| 259 | 'Mentee', $user->getId(), |
| 260 | 'IsActive' |
| 261 | ); |
| 262 | } |
| 263 | |
| 264 | /** |
| 265 | * Invalidates cache for isMenteeActive() |
| 266 | * |
| 267 | * @param UserIdentity $user |
| 268 | */ |
| 269 | protected function invalidateIsMenteeActive( UserIdentity $user ): void { |
| 270 | $this->wanCache->delete( $this->makeIsMenteeActiveCacheKey( $user ) ); |
| 271 | } |
| 272 | |
| 273 | /** |
| 274 | * Is the mentee active? |
| 275 | * |
| 276 | * This will be used by MentorFilterHooks to only include |
| 277 | * recently active mentees, to avoid errors like T293182. |
| 278 | * |
| 279 | * A mentee should be marked as active if they edited less than |
| 280 | * $wgRCMaxAge seconds ago. |
| 281 | * |
| 282 | * @param UserIdentity $mentee |
| 283 | * @return bool|null |
| 284 | */ |
| 285 | public function isMenteeActive( UserIdentity $mentee ): ?bool { |
| 286 | return $this->wanCache->getWithSetCallback( |
| 287 | $this->makeIsMenteeActiveCacheKey( $mentee ), |
| 288 | self::TTL_DAY, |
| 289 | function () use ( $mentee ) { |
| 290 | return $this->isMenteeActiveUncached( $mentee ); |
| 291 | } |
| 292 | ); |
| 293 | } |
| 294 | |
| 295 | /** |
| 296 | * Is the mentee active? |
| 297 | * |
| 298 | * Bypasses caching. |
| 299 | * |
| 300 | * @see MentorStore::isMenteeActive() |
| 301 | * @param UserIdentity $mentee |
| 302 | * @return bool|null |
| 303 | */ |
| 304 | abstract protected function isMenteeActiveUncached( UserIdentity $mentee ): ?bool; |
| 305 | |
| 306 | /** |
| 307 | * Mark the mentee as active |
| 308 | * |
| 309 | * This will be used by MentorFilterHooks to only include |
| 310 | * recently active mentees, to avoid errors like T293182. |
| 311 | * |
| 312 | * A mentee should be marked as active if they edited less than |
| 313 | * $wgRCMaxAge seconds ago. |
| 314 | * |
| 315 | * Method should only make a write query if the mentee is not |
| 316 | * already marked as active. |
| 317 | * |
| 318 | * @param UserIdentity $mentee |
| 319 | */ |
| 320 | abstract public function markMenteeAsActive( UserIdentity $mentee ): void; |
| 321 | |
| 322 | /** |
| 323 | * Mark a mentee as inactive |
| 324 | * |
| 325 | * This will be used by MentorFilterHooks to only include |
| 326 | * recently active mentees, to avoid errors like T293182. |
| 327 | * |
| 328 | * A mentee should be marked as inactive if they edited more than |
| 329 | * $wgRCMaxAge seconds ago. |
| 330 | * |
| 331 | * Method should only make a write query if the mentee is not |
| 332 | * already marked as inactive. |
| 333 | * |
| 334 | * @param UserIdentity $mentee |
| 335 | */ |
| 336 | abstract public function markMenteeAsInactive( UserIdentity $mentee ): void; |
| 337 | } |