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<?php |
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/* |
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* This file is part of questocat/laravel-rally package. |
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* |
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* (c) questocat <[email protected]> |
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* |
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* This source file is subject to the MIT license that is bundled |
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* with this source code in the file LICENSE. |
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*/ |
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namespace Questocat\Rally\Traits; |
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trait CanFollow |
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{ |
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/** |
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* Follow a followable entity. |
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* |
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* @param int|array|\Illuminate\Database\Eloquent\Model $followable |
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* @param string $className |
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* |
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* @return array |
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*/ |
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public function follow($followable, $className = __CLASS__) |
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{ |
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return $this->following($className)->sync($followable, false); |
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} |
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/** |
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* Unfollow a followable entity. |
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* |
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* @param int|array|\Illuminate\Database\Eloquent\Model $followable |
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* @param string $className |
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* |
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* @return bool|null |
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*/ |
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public function unfollow($followable, $className = __CLASS__) |
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{ |
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return $this->following($className)->detach($followable); |
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} |
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/** |
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* Check if entity is following given entity. |
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* |
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* @param int|\Illuminate\Database\Eloquent\Model $followable |
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* @param string $className |
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* |
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* @return bool |
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*/ |
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public function isFollowing($followable, $className = __CLASS__) |
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{ |
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return $this->following($className)->get()->contains($followable); |
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} |
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/** |
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* Toggle follow a followable or followables. |
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* |
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* @param int|array|\Illuminate\Database\Eloquent\Model $followable |
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* @param string $className |
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* |
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* @return array |
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*/ |
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public function toggleFollow($followable, $className = __CLASS__) |
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{ |
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return $this->following($className)->toggle($followable); |
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} |
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/** |
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* Return entity following. |
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* |
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* @param string $className |
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* |
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* @return \Illuminate\Database\Eloquent\Relations\MorphToMany |
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*/ |
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public function following($className = __CLASS__) |
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{ |
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return $this->morphedByMany($className, config('rally.followable_prefix'), config('rally.followers_table'), config('rally.follower_prefix').'_id', config('rally.followable_prefix').'_id')->withTimestamps(); |
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} |
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} |
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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.