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<?php |
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/** |
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* This file is part of Friends. |
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* |
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* (c) Christopher Lass <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace Arubacao\Friends\Traits; |
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use Arubacao\Friends\FriendshipStatus; |
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use Illuminate\Support\Facades\Config; |
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trait Friendable |
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{ |
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/** |
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* @return \Illuminate\Database\Eloquent\Relations\BelongsToMany |
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*/ |
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public function friends_i_am_sender() |
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{ |
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return $this->belongsToMany( |
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Config::get('friends.user_model'), |
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'friends', |
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'sender_id', 'recipient_id') |
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->withTimestamps() |
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->withPivot([ |
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'friendship_status', |
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]) |
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->orderBy('friends.updated_at', 'desc'); |
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} |
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/** |
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* @return \Illuminate\Database\Eloquent\Relations\BelongsToMany |
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*/ |
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public function friends_i_am_recipient() |
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{ |
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return $this->belongsToMany( |
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Config::get('friends.user_model'), |
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'friends', |
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'recipient_id', 'sender_id') |
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->withTimestamps() |
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->withPivot([ |
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'friendship_status', |
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]) |
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->orderBy('friends.updated_at', 'desc'); |
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} |
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/** |
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* @return \Illuminate\Database\Eloquent\Builder |
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*/ |
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public function scopeIncludeRelationshipsWith($query, $user) |
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{ |
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$userId = $this->retrieveUserId($user); |
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return $query->with([ |
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'friends_i_am_sender' => function ($queryIn) use ($userId) { |
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$queryIn->where('friends.recipient_id', $userId) |
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->get(); |
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}, |
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'friends_i_am_recipient' => function ($queryIn) use ($userId) { |
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$queryIn->where('friends.sender_id', $userId) |
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->get(); |
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}, |
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]); |
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} |
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/** |
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* @return \Illuminate\Database\Eloquent\Collection |
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*/ |
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public function friends() |
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{ |
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$me = $this->with([ |
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'friends_i_am_sender' => function ($query) { |
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$query->where('friends.friendship_status', FriendshipStatus::ACCEPTED) |
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->get(); |
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}, |
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'friends_i_am_recipient' => function ($query) { |
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$query->where('friends.friendship_status', FriendshipStatus::ACCEPTED) |
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->get(); |
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}, |
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]) |
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->where('id', '=', $this->getKey()) |
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->first(); |
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$friends = $this->mergedFriends($me); |
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return $friends; |
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} |
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/** |
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* @return \Illuminate\Database\Eloquent\Collection |
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*/ |
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public function incoming_friends() |
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{ |
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$me = $this->with([ |
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'friends_i_am_recipient' => function ($query) { |
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$query->where('friends.friendship_status', FriendshipStatus::PENDING) |
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->get(); |
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}, |
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]) |
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->where('id', '=', $this->getKey()) |
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->first(); |
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return $me->friends_i_am_recipient; |
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} |
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/** |
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* @return \Illuminate\Database\Eloquent\Collection |
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*/ |
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public function any_friends() |
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{ |
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$me = $this->with([ |
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'friends_i_am_sender', |
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'friends_i_am_recipient', |
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]) |
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->where('id', '=', $this->getKey()) |
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->first(); |
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$any_friends = $this->mergedFriends($me); |
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return $any_friends; |
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} |
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/** |
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* Alias to eloquent many-to-many relation's attach() method. |
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* |
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* @param int|User $user |
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* @return bool |
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*/ |
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public function sendFriendRequestTo($user) |
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{ |
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$userId = $this->retrieveUserId($user); |
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if ($userId == $this->getKey()) { |
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// Method not allowed on self |
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return false; |
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} |
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$relationship = $this->getRelationshipWith($userId, [ |
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FriendshipStatus::PENDING, |
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FriendshipStatus::ACCEPTED, |
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]); |
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if (! is_null($relationship)) { |
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if ($relationship->pivot->friendship_status == FriendshipStatus::ACCEPTED) { |
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// Already friends |
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return false; |
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} |
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if ($relationship->pivot->friendship_status == FriendshipStatus::PENDING && |
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$relationship->pivot->recipient_id == $this->getKey()) { |
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// Recipient already sent a friend request |
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// Accept pending friend request |
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$relationship->pivot->friendship_status = FriendshipStatus::ACCEPTED; |
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$relationship->pivot->save(); |
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/* @todo: fire event friend request accepted */ |
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$this->reload(); |
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return true; |
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} |
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return false; |
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} |
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$this->friends_i_am_sender()->attach($userId, [ |
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'friendship_status' => FriendshipStatus::PENDING, |
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]); |
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/* @todo: fire event friend request sent */ |
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$this->reload(); |
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return true; |
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} |
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/** |
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* @param int|User $user |
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* @return bool |
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*/ |
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public function acceptFriendRequestFrom($user) |
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{ |
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$userId = $this->retrieveUserId($user); |
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if ($userId == $this->getKey()) { |
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// Method not allowed on self |
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return false; |
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} |
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$relationship = $this->getPendingRequestFrom($userId); |
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if (! is_null($relationship)) { |
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$relationship->pivot->friendship_status = FriendshipStatus::ACCEPTED; |
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$relationship->pivot->save(); |
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/* @todo: fire event friend request accepted */ |
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$this->reload(); |
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return true; |
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} |
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return false; |
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} |
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/** |
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* @param int|User $user |
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* @return bool |
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*/ |
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public function denyFriendRequestFrom($user) |
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{ |
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$userId = $this->retrieveUserId($user); |
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if ($userId == $this->getKey()) { |
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// Method not allowed on self |
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return false; |
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} |
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$relationship = $this->getPendingRequestFrom($userId); |
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if (! is_null($relationship)) { |
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$relationship->pivot->delete(); |
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/* @todo: fire event friend request denied */ |
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$this->reload(); |
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return true; |
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} |
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return false; |
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} |
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/** |
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* @param int|User $user |
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* @return bool |
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*/ |
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public function deleteFriend($user) |
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{ |
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$userId = $this->retrieveUserId($user); |
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if ($userId == $this->getKey()) { |
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// Method not allowed on self |
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return false; |
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} |
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while ($relationship = $this->getRelationshipWith($userId, [ |
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FriendshipStatus::ACCEPTED, |
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FriendshipStatus::PENDING, |
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])) { |
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$relationship->pivot->delete(); |
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/* @todo: fire event friend deleted */ |
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} |
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$this->reload(); |
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return true; |
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} |
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/** |
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* @param int|array|User $user |
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* @return bool |
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*/ |
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public function isFriendWith($user) |
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{ |
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$userId = $this->retrieveUserId($user); |
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return $this->hasRelationshipWith($userId, [FriendshipStatus::ACCEPTED]); |
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} |
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/** |
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* @param int|array|User $user |
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* @param array $status |
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* @return bool |
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*/ |
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public function hasRelationshipWith($user, $status) |
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{ |
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$userId = $this->retrieveUserId($user); |
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$relationship = $this->getRelationshipWith($userId, $status); |
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return (is_null($relationship)) ? false : true; |
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} |
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/** |
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* @param int|array|User $user |
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* @param array $status |
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* @return mixed |
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*/ |
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public function getRelationshipWith($user, $status) |
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{ |
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$userId = $this->retrieveUserId($user); |
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if ($userId == $this->getKey()) { |
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// Method not allowed on self |
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return; |
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} |
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$attempt1 = $this->friends_i_am_recipient() |
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->wherePivotIn('friendship_status', $status) |
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->wherePivot('sender_id', $userId) |
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->first(); |
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if (! is_null($attempt1)) { |
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return $attempt1; |
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} |
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$attempt2 = $this->friends_i_am_sender() |
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->wherePivotIn('friendship_status', $status) |
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->wherePivot('recipient_id', $userId) |
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->first(); |
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if (! is_null($attempt2)) { |
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return $attempt2; |
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} |
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} |
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/** |
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* @param int|array|User $user |
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* @return bool |
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*/ |
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public function hasPendingRequestFrom($user) |
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{ |
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$userId = $this->retrieveUserId($user); |
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if ($userId == $this->getKey()) { |
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// Method not allowed on self |
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return false; |
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} |
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$relationship = $this->getPendingRequestFrom($userId); |
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if (! is_null($relationship)) { |
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return true; |
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} |
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return false; |
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} |
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/** |
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* @param int|array|User $user |
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* @return int|null |
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*/ |
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private function retrieveUserId($user) |
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{ |
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if (is_object($user)) { |
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return $user->getKey(); |
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} |
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if (is_array($user) && isset($user['id'])) { |
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return $user['id']; |
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} |
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return $user; |
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} |
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/** |
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* @param int $userId |
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* @return mixed |
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*/ |
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private function getPendingRequestFrom($userId) |
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{ |
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return $this->friends_i_am_recipient() |
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->wherePivot('friendship_status', FriendshipStatus::PENDING) |
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->wherePivot('sender_id', $userId) |
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->first(); |
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} |
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/** |
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* Eager load relations on the model. |
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*/ |
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private function reload() |
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{ |
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$this->load('friends_i_am_recipient', 'friends_i_am_sender'); |
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} |
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/** |
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* @param User $me |
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* @return \Illuminate\Database\Eloquent\Collection |
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*/ |
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private function mergedFriends($me) |
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{ |
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$friends = collect([]); |
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$friends->push($me->friends_i_am_sender); |
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$friends->push($me->friends_i_am_recipient); |
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18 |
|
$friends = $friends->flatten(); |
380
|
|
|
|
381
|
18 |
|
return $friends; |
382
|
|
|
} |
383
|
|
|
} |
384
|
|
|
|
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
Idable
provides a methodequalsId
that 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.