dimsav /
laravel-translatable
Duplicate code is one of the most pungent code smells. A rule that is often used is to re-structure code once it is duplicated in three or more places.
Common duplication problems, and corresponding solutions are:
Complex classes like Translatable often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes. You can also have a look at the cohesion graph to spot any un-connected, or weakly-connected components.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use Translatable, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 12 | trait Translatable |
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| 13 | { |
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| 14 | protected $defaultLocale; |
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| 15 | |||
| 16 | /** |
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| 17 | * Alias for getTranslation(). |
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| 18 | * |
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| 19 | * @param string|null $locale |
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| 20 | * @param bool $withFallback |
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| 21 | * |
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| 22 | * @return \Illuminate\Database\Eloquent\Model|null |
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| 23 | */ |
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| 24 | public function translate($locale = null, $withFallback = false) |
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| 25 | { |
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| 26 | return $this->getTranslation($locale, $withFallback); |
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| 27 | } |
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| 28 | |||
| 29 | /** |
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| 30 | * Alias for getTranslation(). |
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| 31 | * |
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| 32 | * @param string $locale |
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| 33 | * |
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| 34 | * @return \Illuminate\Database\Eloquent\Model|null |
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| 35 | */ |
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| 36 | public function translateOrDefault($locale) |
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| 40 | |||
| 41 | /** |
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| 42 | * Alias for getTranslationOrNew(). |
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| 43 | * |
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| 44 | * @param string $locale |
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| 45 | * |
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| 46 | * @return \Illuminate\Database\Eloquent\Model|null |
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| 47 | */ |
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| 48 | public function translateOrNew($locale) |
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| 52 | |||
| 53 | /** |
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| 54 | * @param string|null $locale |
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| 55 | * @param bool $withFallback |
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| 56 | * |
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| 57 | * @return \Illuminate\Database\Eloquent\Model|null |
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| 58 | */ |
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| 59 | public function getTranslation($locale = null, $withFallback = null) |
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| 60 | { |
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| 61 | $configFallbackLocale = $this->getFallbackLocale(); |
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| 62 | $locale = $locale ?: $this->locale(); |
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| 63 | $withFallback = $withFallback === null ? $this->useFallback() : $withFallback; |
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| 64 | $fallbackLocale = $this->getFallbackLocale($locale); |
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| 65 | |||
| 66 | if ($translation = $this->getTranslationByLocaleKey($locale)) { |
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| 67 | return $translation; |
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| 68 | } |
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| 69 | if ($withFallback && $fallbackLocale) { |
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| 70 | if ($translation = $this->getTranslationByLocaleKey($fallbackLocale)) { |
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| 71 | return $translation; |
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| 72 | } |
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| 73 | if ($translation = $this->getTranslationByLocaleKey($configFallbackLocale)) { |
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| 74 | return $translation; |
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| 75 | } |
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| 76 | } |
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| 77 | |||
| 78 | return null; |
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| 79 | } |
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| 80 | |||
| 81 | /** |
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| 82 | * @param string|null $locale |
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| 83 | * |
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| 84 | * @return bool |
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| 85 | */ |
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| 86 | public function hasTranslation($locale = null) |
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| 87 | { |
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| 88 | $locale = $locale ?: $this->locale(); |
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| 89 | |||
| 90 | foreach ($this->translations as $translation) { |
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| 91 | if ($translation->getAttribute($this->getLocaleKey()) == $locale) { |
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| 92 | return true; |
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| 93 | } |
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| 94 | } |
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| 95 | |||
| 96 | return false; |
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| 97 | } |
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| 98 | |||
| 99 | /** |
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| 100 | * @return string |
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| 101 | */ |
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| 102 | public function getTranslationModelName() |
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| 106 | |||
| 107 | /** |
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| 108 | * @return string |
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| 109 | */ |
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| 110 | public function getTranslationModelNameDefault() |
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| 111 | { |
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| 112 | $config = app()->make('config'); |
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| 113 | |||
| 114 | return get_class($this).$config->get('translatable.translation_suffix', 'Translation'); |
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| 115 | } |
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| 116 | |||
| 117 | /** |
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| 118 | * @return string |
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| 119 | */ |
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| 120 | public function getRelationKey() |
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| 121 | { |
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| 122 | if ($this->translationForeignKey) { |
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| 123 | $key = $this->translationForeignKey; |
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| 124 | } elseif ($this->primaryKey !== 'id') { |
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| 125 | $key = $this->primaryKey; |
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| 126 | } else { |
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| 127 | $key = $this->getForeignKey(); |
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| 128 | } |
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| 129 | |||
| 130 | return $key; |
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| 131 | } |
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| 132 | |||
| 133 | /** |
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| 134 | * @return string |
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| 135 | */ |
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| 136 | public function getLocaleKey() |
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| 137 | { |
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| 138 | $config = app()->make('config'); |
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| 139 | |||
| 140 | return $this->localeKey ?: $config->get('translatable.locale_key', 'locale'); |
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| 141 | } |
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| 142 | |||
| 143 | /** |
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| 144 | * @return \Illuminate\Database\Eloquent\Relations\HasMany |
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| 145 | */ |
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| 146 | public function translations() |
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| 150 | |||
| 151 | /** |
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| 152 | * @param string $key |
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| 153 | * |
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| 154 | * @return mixed |
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| 155 | */ |
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| 156 | public function getAttribute($key) |
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| 157 | { |
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| 158 | list($attribute, $locale) = $this->getAttributeAndLocale($key); |
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| 159 | |||
| 160 | if ($this->isTranslationAttribute($attribute)) { |
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| 161 | if ($this->getTranslation($locale) === null) { |
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| 162 | return null; |
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| 163 | } |
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| 164 | |||
| 165 | // If the given $attribute has a mutator, we push it to $attributes and then call getAttributeValue |
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| 166 | // on it. This way, we can use Eloquent's checking for Mutation, type casting, and |
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| 167 | // Date fields. |
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| 168 | if ($this->hasGetMutator($attribute)) { |
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| 169 | $this->attributes[$attribute] = $this->getTranslation($locale)->$attribute; |
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| 170 | |||
| 171 | return $this->getAttributeValue($attribute); |
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| 172 | } |
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| 173 | |||
| 174 | return $this->getTranslation($locale)->$attribute; |
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| 175 | } |
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| 176 | |||
| 177 | return parent::getAttribute($key); |
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| 178 | } |
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| 179 | |||
| 180 | /** |
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| 181 | * @param string $key |
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| 182 | * @param mixed $value |
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| 183 | * |
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| 184 | * @return $this |
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| 185 | */ |
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| 186 | public function setAttribute($key, $value) |
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| 187 | { |
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| 188 | list($attribute, $locale) = $this->getAttributeAndLocale($key); |
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| 189 | |||
| 190 | if ($this->isTranslationAttribute($attribute)) { |
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| 191 | $this->getTranslationOrNew($locale)->$attribute = $value; |
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| 192 | } else { |
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| 193 | return parent::setAttribute($key, $value); |
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| 194 | } |
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| 195 | |||
| 196 | return $this; |
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| 197 | } |
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| 198 | |||
| 199 | /** |
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| 200 | * @param array $options |
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| 201 | * |
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| 202 | * @return bool |
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| 203 | */ |
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| 204 | public function save(array $options = []) |
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| 205 | { |
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| 206 | if ($this->exists) { |
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| 207 | if (count($this->getDirty()) > 0) { |
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| 208 | // If $this->exists and dirty, parent::save() has to return true. If not, |
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| 209 | // an error has occurred. Therefore we shouldn't save the translations. |
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| 210 | if (parent::save($options)) { |
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| 211 | return $this->saveTranslations(); |
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| 212 | } |
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| 213 | |||
| 214 | return false; |
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| 215 | } else { |
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| 216 | // If $this->exists and not dirty, parent::save() skips saving and returns |
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| 217 | // false. So we have to save the translations |
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| 218 | if ($saved = $this->saveTranslations()) { |
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| 219 | $this->fireModelEvent('saved', false); |
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| 220 | $this->fireModelEvent('updated', false); |
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| 221 | } |
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| 222 | |||
| 223 | return $saved; |
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| 224 | } |
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| 225 | } elseif (parent::save($options)) { |
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| 226 | // We save the translations only if the instance is saved in the database. |
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| 227 | return $this->saveTranslations(); |
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| 228 | } |
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| 229 | |||
| 230 | return false; |
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| 231 | } |
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| 232 | |||
| 233 | /** |
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| 234 | * @param string $locale |
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| 235 | * |
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| 236 | * @return \Illuminate\Database\Eloquent\Model|null |
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| 237 | */ |
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| 238 | protected function getTranslationOrNew($locale) |
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| 239 | { |
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| 240 | if (($translation = $this->getTranslation($locale, false)) === null) { |
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| 241 | $translation = $this->getNewTranslation($locale); |
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| 242 | } |
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| 243 | |||
| 244 | return $translation; |
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| 245 | } |
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| 246 | |||
| 247 | /** |
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| 248 | * @param array $attributes |
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| 249 | * |
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| 250 | * @throws \Illuminate\Database\Eloquent\MassAssignmentException |
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| 251 | * @return $this |
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| 252 | */ |
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| 253 | public function fill(array $attributes) |
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| 254 | { |
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| 255 | foreach ($attributes as $key => $values) { |
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| 256 | if ($this->isKeyALocale($key)) { |
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| 257 | $this->getTranslationOrNew($key)->fill($values); |
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| 258 | unset($attributes[$key]); |
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| 259 | } else { |
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| 260 | list($attribute, $locale) = $this->getAttributeAndLocale($key); |
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| 261 | if ($this->isTranslationAttribute($attribute) and $this->isKeyALocale($locale)) { |
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| 262 | $this->getTranslationOrNew($locale)->fill([$attribute => $values]); |
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| 263 | unset($attributes[$key]); |
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| 264 | } |
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| 265 | } |
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| 266 | } |
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| 267 | |||
| 268 | return parent::fill($attributes); |
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| 269 | } |
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| 270 | |||
| 271 | /** |
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| 272 | * @param string $key |
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| 273 | */ |
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| 274 | private function getTranslationByLocaleKey($key) |
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| 275 | { |
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| 276 | foreach ($this->translations as $translation) { |
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| 277 | if ($translation->getAttribute($this->getLocaleKey()) == $key) { |
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| 278 | return $translation; |
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| 279 | } |
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| 280 | } |
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| 281 | |||
| 282 | return null; |
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| 283 | } |
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| 284 | |||
| 285 | /** |
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| 286 | * @param null $locale |
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| 287 | * |
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| 288 | * @return string |
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| 289 | */ |
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| 290 | private function getFallbackLocale($locale = null) |
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| 291 | { |
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| 292 | if ($locale && $this->isLocaleCountryBased($locale)) { |
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| 293 | if ($fallback = $this->getLanguageFromCountryBasedLocale($locale)) { |
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| 294 | return $fallback; |
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| 295 | } |
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| 296 | } |
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| 297 | |||
| 298 | return app()->make('config')->get('translatable.fallback_locale'); |
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| 299 | } |
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| 300 | |||
| 301 | /** |
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| 302 | * @param $locale |
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| 303 | * |
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| 304 | * @return bool |
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| 305 | */ |
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| 306 | private function isLocaleCountryBased($locale) |
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| 307 | { |
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| 308 | return strpos($locale, $this->getLocaleSeparator()) !== false; |
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| 309 | } |
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| 310 | |||
| 311 | /** |
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| 312 | * @param $locale |
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| 313 | * |
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| 314 | * @return string |
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| 315 | */ |
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| 316 | private function getLanguageFromCountryBasedLocale($locale) |
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| 317 | { |
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| 318 | $parts = explode($this->getLocaleSeparator(), $locale); |
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| 319 | |||
| 320 | return array_get($parts, 0); |
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| 321 | } |
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| 322 | |||
| 323 | /** |
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| 324 | * @return bool|null |
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| 325 | */ |
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| 326 | private function useFallback() |
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| 327 | { |
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| 328 | if (isset($this->useTranslationFallback) && $this->useTranslationFallback !== null) { |
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| 329 | return $this->useTranslationFallback; |
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| 330 | } |
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| 331 | |||
| 332 | return app()->make('config')->get('translatable.use_fallback'); |
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| 333 | } |
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| 334 | |||
| 335 | /** |
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| 336 | * @param string $key |
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| 337 | * |
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| 338 | * @return bool |
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| 339 | */ |
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| 340 | public function isTranslationAttribute($key) |
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| 341 | { |
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| 342 | return in_array($key, $this->translatedAttributes); |
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| 343 | } |
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| 344 | |||
| 345 | /** |
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| 346 | * @param string $key |
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| 347 | * |
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| 348 | * @throws \Dimsav\Translatable\Exception\LocalesNotDefinedException |
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| 349 | * @return bool |
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| 350 | */ |
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| 351 | protected function isKeyALocale($key) |
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| 352 | { |
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| 353 | $locales = $this->getLocales(); |
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| 354 | |||
| 355 | return in_array($key, $locales); |
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| 356 | } |
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| 357 | |||
| 358 | /** |
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| 359 | * @throws \Dimsav\Translatable\Exception\LocalesNotDefinedException |
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| 360 | * @return array |
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| 361 | */ |
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| 362 | protected function getLocales() |
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| 363 | { |
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| 364 | $localesConfig = (array) app()->make('config')->get('translatable.locales'); |
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| 365 | |||
| 366 | if (empty($localesConfig)) { |
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| 367 | throw new LocalesNotDefinedException('Please make sure you have run "php artisan config:publish dimsav/laravel-translatable" '. |
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| 368 | ' and that the locales configuration is defined.'); |
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| 369 | } |
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| 370 | |||
| 371 | $locales = []; |
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| 372 | foreach ($localesConfig as $key => $locale) { |
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| 373 | if (is_array($locale)) { |
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| 374 | $locales[] = $key; |
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| 375 | foreach ($locale as $countryLocale) { |
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| 376 | $locales[] = $key.$this->getLocaleSeparator().$countryLocale; |
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| 377 | } |
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| 378 | } else { |
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| 379 | $locales[] = $locale; |
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| 380 | } |
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| 381 | } |
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| 382 | |||
| 383 | return $locales; |
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| 384 | } |
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| 385 | |||
| 386 | /** |
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| 387 | * @return string |
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| 388 | */ |
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| 389 | protected function getLocaleSeparator() |
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| 390 | { |
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| 391 | return app()->make('config')->get('translatable.locale_separator', '-'); |
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| 392 | } |
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| 393 | |||
| 394 | /** |
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| 395 | * @return bool |
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| 396 | */ |
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| 397 | protected function saveTranslations() |
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| 398 | { |
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| 399 | $saved = true; |
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| 400 | foreach ($this->translations as $translation) { |
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| 401 | if ($saved && $this->isTranslationDirty($translation)) { |
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| 402 | $translation->setAttribute($this->getRelationKey(), $this->getKey()); |
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| 403 | $saved = $translation->save(); |
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| 404 | } |
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| 405 | } |
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| 406 | |||
| 407 | return $saved; |
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| 408 | } |
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| 409 | |||
| 410 | /** |
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| 411 | * @param \Illuminate\Database\Eloquent\Model $translation |
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| 412 | * |
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| 413 | * @return bool |
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| 414 | */ |
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| 415 | protected function isTranslationDirty(Model $translation) |
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| 416 | { |
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| 417 | $dirtyAttributes = $translation->getDirty(); |
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| 418 | unset($dirtyAttributes[$this->getLocaleKey()]); |
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| 419 | |||
| 420 | return count($dirtyAttributes) > 0; |
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| 421 | } |
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| 422 | |||
| 423 | /** |
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| 424 | * @param string $locale |
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| 425 | * |
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| 426 | * @return \Illuminate\Database\Eloquent\Model |
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| 427 | */ |
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| 428 | public function getNewTranslation($locale) |
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| 429 | { |
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| 430 | $modelName = $this->getTranslationModelName(); |
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| 431 | $translation = new $modelName(); |
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| 432 | $translation->setAttribute($this->getLocaleKey(), $locale); |
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| 433 | $this->translations->add($translation); |
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| 434 | |||
| 435 | return $translation; |
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| 436 | } |
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| 437 | |||
| 438 | /** |
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| 439 | * @param $key |
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| 440 | * |
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| 441 | * @return bool |
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| 442 | */ |
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| 443 | public function __isset($key) |
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| 444 | { |
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| 445 | return $this->isTranslationAttribute($key) || parent::__isset($key); |
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| 446 | } |
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| 447 | |||
| 448 | /** |
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| 449 | * @param \Illuminate\Database\Eloquent\Builder $query |
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| 450 | * @param string $locale |
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| 451 | * |
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| 452 | * @return \Illuminate\Database\Eloquent\Builder|static |
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| 453 | */ |
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| 454 | View Code Duplication | public function scopeTranslatedIn(Builder $query, $locale = null) |
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| 455 | { |
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| 456 | $locale = $locale ?: $this->locale(); |
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| 457 | |||
| 458 | return $query->whereHas('translations', function (Builder $q) use ($locale) { |
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| 459 | $q->where($this->getLocaleKey(), '=', $locale); |
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| 460 | }); |
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| 461 | } |
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| 462 | |||
| 463 | /** |
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| 464 | * @param \Illuminate\Database\Eloquent\Builder $query |
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| 465 | * @param string $locale |
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| 466 | * |
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| 467 | * @return \Illuminate\Database\Eloquent\Builder|static |
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| 468 | */ |
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| 469 | View Code Duplication | public function scopeNotTranslatedIn(Builder $query, $locale = null) |
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| 470 | { |
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| 471 | $locale = $locale ?: $this->locale(); |
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| 472 | |||
| 473 | return $query->whereDoesntHave('translations', function (Builder $q) use ($locale) { |
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| 474 | $q->where($this->getLocaleKey(), '=', $locale); |
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| 475 | }); |
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| 476 | } |
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| 477 | |||
| 478 | /** |
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| 479 | * @param \Illuminate\Database\Eloquent\Builder $query |
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| 480 | * |
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| 481 | * @return \Illuminate\Database\Eloquent\Builder|static |
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| 482 | */ |
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| 483 | public function scopeTranslated(Builder $query) |
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| 484 | { |
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| 485 | return $query->has('translations'); |
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| 486 | } |
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| 487 | |||
| 488 | /** |
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| 489 | * Adds scope to get a list of translated attributes, using the current locale. |
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| 490 | * Example usage: Country::listsTranslations('name')->get()->toArray() |
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| 491 | * Will return an array with items: |
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| 492 | * [ |
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| 493 | * 'id' => '1', // The id of country |
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| 494 | * 'name' => 'Griechenland' // The translated name |
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| 495 | * ]. |
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| 496 | * |
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| 497 | * @param \Illuminate\Database\Eloquent\Builder $query |
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| 498 | * @param string $translationField |
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| 499 | */ |
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| 500 | public function scopeListsTranslations(Builder $query, $translationField) |
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| 501 | { |
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| 502 | $withFallback = $this->useFallback(); |
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| 503 | $translationTable = $this->getTranslationsTable(); |
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| 504 | $localeKey = $this->getLocaleKey(); |
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| 505 | |||
| 506 | $query |
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| 507 | ->select($this->getTable().'.'.$this->getKeyName(), $translationTable.'.'.$translationField) |
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| 508 | ->leftJoin($translationTable, $translationTable.'.'.$this->getRelationKey(), '=', $this->getTable().'.'.$this->getKeyName()) |
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| 509 | ->where($translationTable.'.'.$localeKey, $this->locale()); |
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| 510 | if ($withFallback) { |
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| 511 | $query->orWhere(function (Builder $q) use ($translationTable, $localeKey) { |
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| 512 | $q->where($translationTable.'.'.$localeKey, $this->getFallbackLocale()) |
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| 513 | ->whereNotIn($translationTable.'.'.$this->getRelationKey(), function (QueryBuilder $q) use ( |
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| 514 | $translationTable, |
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| 515 | $localeKey |
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| 516 | ) { |
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| 517 | $q->select($translationTable.'.'.$this->getRelationKey()) |
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| 518 | ->from($translationTable) |
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| 519 | ->where($translationTable.'.'.$localeKey, $this->locale()); |
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| 520 | }); |
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| 521 | }); |
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| 522 | } |
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| 523 | } |
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| 524 | |||
| 525 | /** |
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| 526 | * This scope eager loads the translations for the default and the fallback locale only. |
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| 527 | * We can use this as a shortcut to improve performance in our application. |
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| 528 | * |
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| 529 | * @param Builder $query |
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| 530 | */ |
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| 531 | public function scopeWithTranslation(Builder $query) |
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| 532 | { |
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| 533 | $query->with([ |
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| 534 | 'translations' => function (Relation $query) { |
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| 535 | $query->where($this->getTranslationsTable().'.'.$this->getLocaleKey(), $this->locale()); |
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| 536 | |||
| 537 | if ($this->useFallback()) { |
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| 538 | return $query->orWhere($this->getTranslationsTable().'.'.$this->getLocaleKey(), $this->getFallbackLocale()); |
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| 539 | } |
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| 540 | }, |
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| 541 | ]); |
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| 542 | } |
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| 543 | |||
| 544 | /** |
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| 545 | * This scope filters results by checking the translation fields. |
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| 546 | * |
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| 547 | * @param \Illuminate\Database\Eloquent\Builder $query |
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| 548 | * @param string $key |
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| 549 | * @param string $value |
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| 550 | * @param string $locale |
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| 551 | * |
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| 552 | * @return \Illuminate\Database\Eloquent\Builder|static |
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| 553 | */ |
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| 554 | View Code Duplication | public function scopeWhereTranslation(Builder $query, $key, $value, $locale = null) |
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| 563 | |||
| 564 | /** |
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| 565 | * This scope filters results by checking the translation fields. |
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| 566 | * |
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| 567 | * @param \Illuminate\Database\Eloquent\Builder $query |
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| 568 | * @param string $key |
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| 569 | * @param string $value |
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| 570 | * @param string $locale |
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| 571 | * |
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| 572 | * @return \Illuminate\Database\Eloquent\Builder|static |
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| 573 | */ |
||
| 574 | View Code Duplication | public function scopeWhereTranslationLike(Builder $query, $key, $value, $locale = null) |
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| 583 | |||
| 584 | /** |
||
| 585 | * @return array |
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| 586 | */ |
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| 587 | public function toArray() |
||
| 588 | { |
||
| 589 | $attributes = parent::toArray(); |
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| 590 | |||
| 591 | if ($this->relationLoaded('translations') || $this->toArrayAlwaysLoadsTranslations()) { |
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| 592 | // continue |
||
| 593 | } else { |
||
| 594 | return $attributes; |
||
| 595 | } |
||
| 596 | |||
| 597 | $hiddenAttributes = $this->getHidden(); |
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| 598 | |||
| 599 | foreach ($this->translatedAttributes as $field) { |
||
| 600 | if (in_array($field, $hiddenAttributes)) { |
||
| 601 | continue; |
||
| 602 | } |
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| 603 | |||
| 604 | if ($translations = $this->getTranslation()) { |
||
| 605 | $attributes[$field] = $translations->$field; |
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| 606 | } |
||
| 607 | } |
||
| 608 | |||
| 609 | return $attributes; |
||
| 610 | } |
||
| 611 | |||
| 612 | /** |
||
| 613 | * @return string |
||
| 614 | */ |
||
| 615 | private function getTranslationsTable() |
||
| 619 | |||
| 620 | /** |
||
| 621 | * @return string |
||
| 622 | */ |
||
| 623 | protected function locale() |
||
| 624 | { |
||
| 625 | if ($this->defaultLocale) { |
||
| 626 | return $this->defaultLocale; |
||
| 627 | } |
||
| 628 | |||
| 629 | return app()->make('config')->get('translatable.locale') |
||
| 630 | ?: app()->make('translator')->getLocale(); |
||
| 631 | } |
||
| 632 | |||
| 633 | /** |
||
| 634 | * Set the default locale on the model. |
||
| 635 | * |
||
| 636 | * @param $locale |
||
| 637 | * |
||
| 638 | * @return $this |
||
| 639 | */ |
||
| 640 | public function setDefaultLocale($locale) |
||
| 641 | { |
||
| 642 | $this->defaultLocale = $locale; |
||
| 643 | |||
| 644 | return $this; |
||
| 645 | } |
||
| 646 | |||
| 647 | /** |
||
| 648 | * Get the default locale on the model. |
||
| 649 | * |
||
| 650 | * @return mixed |
||
| 651 | */ |
||
| 652 | public function getDefaultLocale() |
||
| 656 | |||
| 657 | /** |
||
| 658 | * Deletes all translations for this model. |
||
| 659 | * |
||
| 660 | * @param string|array|null $locales The locales to be deleted (array or single string) |
||
| 661 | * (e.g., ["en", "de"] would remove these translations). |
||
| 662 | */ |
||
| 663 | public function deleteTranslations($locales = null) |
||
| 676 | |||
| 677 | /** |
||
| 678 | * @param $key |
||
| 679 | * |
||
| 680 | * @return array |
||
| 681 | */ |
||
| 682 | private function getAttributeAndLocale($key) |
||
| 690 | |||
| 691 | /** |
||
| 692 | * @return bool |
||
| 693 | */ |
||
| 694 | private function toArrayAlwaysLoadsTranslations() |
||
| 698 | } |
||
| 699 |
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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: