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<?php |
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namespace Gabievi\Promocodes\Traits; |
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use Carbon\Carbon; |
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use Gabievi\Promocodes\Models\Promocode; |
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use Gabievi\Promocodes\Facades\Promocodes; |
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use Gabievi\Promocodes\Exceptions\AlreadyUsedException; |
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trait Rewardable |
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{ |
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/** |
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* Get the promocodes that are related to user. |
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* |
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* @return \Illuminate\Database\Eloquent\Relations\BelongsToMany |
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*/ |
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public function promocodes() |
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{ |
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return $this->belongsToMany(Promocode::class, config('promocodes.relation_table')) |
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->withPivot('used_at'); |
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} |
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/** |
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* Redeem promocode to user and get callback. |
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* |
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* @param string $code |
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* @param null|\Closure $callback |
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* |
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* @return null|\Gabievi\Promocodes\Models\Promocode |
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* @throws AlreadyUsedException |
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*/ |
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public function redeemCode($code, $callback = null) |
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{ |
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return $this->applyCode($code, $callback); |
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} |
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/** |
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* Apply promocode to user and get callback. |
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* |
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* @param string $code |
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* @param null|\Closure $callback |
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* |
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* @return bool|null|\Gabievi\Promocodes\Models\Promocode |
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* @throws AlreadyUsedException |
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*/ |
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public function applyCode($code, $callback = null) |
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{ |
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if ($promocode = Promocodes::check($code)) { |
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if ($promocode->isDisposable() && $promocode->users()->wherePivot(config('promocodes.related_pivot_key'), $this->id)->exists()) { |
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throw new AlreadyUsedException; |
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} |
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$promocode->users()->attach($this->id, [ |
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config('promocodes.foreign_pivot_key') => $promocode->id, |
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'used_at' => Carbon::now(), |
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]); |
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if (!is_null($promocode->quantity)) { |
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$promocode->quantity -= 1; |
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$promocode->save(); |
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} |
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$promocode->load('users'); |
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if (is_callable($callback)) { |
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$callback($promocode); |
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} |
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return $promocode; |
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} |
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if (is_callable($callback)) { |
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$callback(null); |
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} |
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return false; |
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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
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.