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<?php namespace Arcanedev\Localization\Traits; |
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use Arcanedev\Localization\Events\TranslationHasBeenSet; |
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use Arcanedev\Localization\Exceptions\UntranslatableAttributeException; |
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use Illuminate\Support\Str; |
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/** |
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* Trait HasTranslations |
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* |
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* @package Arcanedev\Localization\Traits |
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* @author ARCANEDEV <[email protected]> |
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*/ |
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trait HasTranslations |
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{ |
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/* ----------------------------------------------------------------- |
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| Main Methods |
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| ----------------------------------------------------------------- |
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*/ |
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/** |
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* Get the translatable attributes. |
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* |
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* @return array |
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*/ |
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abstract public function getTranslatableAttributes(); |
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/** |
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* Get the translated attribute value. |
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* |
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* @param string $key |
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* |
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* @return mixed |
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*/ |
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public function getAttributeValue($key) |
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{ |
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return $this->isTranslatableAttribute($key) |
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? $this->getTranslation($key, config('app.locale')) |
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: parent::getAttributeValue($key); |
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} |
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/** |
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* Get the translated attribute (alias). |
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* |
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* @param string $key |
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* @param string $locale |
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* |
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* @return mixed |
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*/ |
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public function trans($key, $locale = '') |
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{ |
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return $this->getTranslation($key, $locale); |
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} |
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/*** |
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* Get the translated attribute. |
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* |
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* @param string $key |
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* @param string $locale |
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* @param bool $useFallback |
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* |
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* @return mixed |
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*/ |
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public function getTranslation($key, $locale, $useFallback = true) |
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{ |
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$locale = $this->normalizeLocale($key, $locale, $useFallback); |
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$translations = $this->getTranslations($key); |
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$translation = isset($translations[$locale]) ? $translations[$locale] : ''; |
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return $this->hasGetMutator($key) |
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? $this->mutateAttribute($key, $translation) |
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: $translation; |
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} |
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/** |
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* Get the translations for the given key. |
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* |
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* @param string $key |
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* |
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* @return array |
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*/ |
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public function getTranslations($key) |
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{ |
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$this->guardAgainstUntranslatableAttribute($key); |
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return json_decode($this->getAttributeFromArray($key) ?: '{}', true); |
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} |
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/** |
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* Set a translation. |
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* |
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* @param string $key |
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* @param string $locale |
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* @param string $value |
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* |
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* @return $this |
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*/ |
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public function setTranslation($key, $locale, $value) |
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{ |
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$this->guardAgainstUntranslatableAttribute($key); |
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$translations = $this->getTranslations($key); |
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$oldValue = isset($translations[$locale]) ? $translations[$locale] : ''; |
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if ($this->hasSetMutator($key)) |
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$value = $this->{'set'.Str::studly($key).'Attribute'}($value); |
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$translations[$locale] = $value; |
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$this->attributes[$key] = json_encode($translations); |
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event(new TranslationHasBeenSet($this, $key, $locale, $oldValue, $value)); |
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return $this; |
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} |
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/** |
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* Set the translations. |
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* |
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* @param string $key |
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* @param array $translations |
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* |
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* @return self |
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*/ |
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public function setTranslations($key, array $translations) |
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{ |
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$this->guardAgainstUntranslatableAttribute($key); |
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foreach ($translations as $locale => $translation) { |
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$this->setTranslation($key, $locale, $translation); |
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} |
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return $this; |
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} |
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/** |
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* Forget a translation. |
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* |
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* @param string $key |
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* @param string $locale |
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* |
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* @return self |
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*/ |
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public function forgetTranslation($key, $locale) |
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{ |
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$translations = $this->getTranslations($key); |
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unset($translations[$locale]); |
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if ($this->hasSetMutator($key)) |
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$this->attributes[$key] = json_encode($this->mutateTranslations($key, $translations)); |
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else |
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$this->setAttribute($key, $translations); |
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return $this; |
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} |
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/** |
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* Forget all the translations by the given locale. |
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* |
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* @param string $locale |
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*/ |
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public function flushTranslations($locale) |
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{ |
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collect($this->getTranslatableAttributes())->each(function ($attribute) use ($locale) { |
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$this->forgetTranslation($attribute, $locale); |
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}); |
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} |
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/** |
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* Get the translated attribute's locales |
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* @param string $key |
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* |
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* @return array |
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*/ |
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public function getTranslatedLocales($key) |
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{ |
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return array_keys($this->getTranslations($key)); |
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} |
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/** |
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* Check if the attribute is translatable. |
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* @param string $key |
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* @return bool |
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*/ |
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public function isTranslatableAttribute($key) |
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{ |
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return in_array($key, $this->getTranslatableAttributes()); |
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} |
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/* ----------------------------------------------------------------- |
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| Other Methods |
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| ----------------------------------------------------------------- |
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*/ |
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/** |
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* Guard against untranslatable attribute. |
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* @param string $key |
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* @throws \Arcanedev\Localization\Exceptions\UntranslatableAttributeException |
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*/ |
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protected function guardAgainstUntranslatableAttribute($key) |
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{ |
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if ( ! $this->isTranslatableAttribute($key)) { |
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$translatable = implode(', ', $this->getTranslatableAttributes()); |
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throw new UntranslatableAttributeException( |
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"The attribute `{$key}` is untranslatable because it's not available in the translatable array: `$translatable`" |
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); |
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} |
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} |
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/** |
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* Normalize the locale. |
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* |
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* @param string $key |
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* @param string $locale |
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* @param bool $useFallback |
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* |
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* @return string |
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*/ |
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protected function normalizeLocale($key, $locale, $useFallback) |
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{ |
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if (in_array($locale, $this->getTranslatedLocales($key)) || ! $useFallback) |
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return $locale; |
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return is_null($fallbackLocale = config('app.fallback_locale')) ? $locale : $fallbackLocale; |
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} |
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/** |
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* Mutate many translations. |
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* @param string $key |
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* @param array $translations |
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* |
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* @return string |
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*/ |
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protected function mutateTranslations($key, array $translations) |
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{ |
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$method = 'set'.Str::studly($key).'Attribute'; |
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return array_map(function ($value) use ($method) { |
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return $this->{$method}($value); |
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}, $translations); |
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} |
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/* ----------------------------------------------------------------- |
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| Eloquent Methods |
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| ----------------------------------------------------------------- |
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*/ |
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/** |
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* Get the casts array. |
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* |
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* @return array |
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*/ |
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public function getCasts() |
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{ |
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return array_merge( |
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parent::getCasts(), array_fill_keys($this->getTranslatableAttributes(), 'array') |
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); |
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} |
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/** |
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* Determine if a get mutator exists for an attribute. |
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* |
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* @param string $key |
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* |
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* @return bool |
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*/ |
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abstract public function hasGetMutator($key); |
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/** |
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* Get the value of an attribute using its mutator. |
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* |
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* @param string $key |
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* @param mixed $value |
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* @return mixed |
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*/ |
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abstract protected function mutateAttribute($key, $value); |
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/** |
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* Get an attribute from the $attributes array. |
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* |
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* @param string $key |
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* |
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* @return mixed |
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*/ |
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abstract protected function getAttributeFromArray($key); |
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/** |
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* Set a given attribute on the model. |
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* |
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* @param string $key |
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* @param mixed $value |
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* @return $this |
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*/ |
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abstract public function setAttribute($key, $value); |
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/** |
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* Determine if a set mutator exists for an attribute. |
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* |
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* @param string $key |
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* |
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* @return bool |
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*/ |
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abstract public function hasSetMutator($key); |
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/** |
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* Encode the given value as JSON. |
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* |
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* @param mixed $value |
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* |
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* @return string |
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*/ |
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abstract protected function asJson($value); |
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} |
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In PHP it is possible to write to properties without declaring them. For example, the following is perfectly valid PHP code:
Generally, it is a good practice to explictly declare properties to avoid accidental typos and provide IDE auto-completion: