Complex classes like MultiLang 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 MultiLang, and based on these observations, apply Extract Interface, too.
1 | <?php |
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21 | class MultiLang |
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22 | { |
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23 | /** |
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24 | * Language/Locale. |
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25 | * |
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26 | * @var string |
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27 | */ |
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28 | protected $lang; |
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29 | |||
30 | /** |
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31 | * System environment |
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32 | * |
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33 | * @var string |
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34 | */ |
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35 | protected $environment; |
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36 | |||
37 | /** |
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38 | * Config. |
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39 | * |
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40 | * @var \Longman\LaravelMultiLang\Config |
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41 | */ |
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42 | protected $config; |
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43 | |||
44 | /** |
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45 | * Repository |
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46 | * |
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47 | * @var \Longman\LaravelMultiLang\Repository |
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48 | */ |
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49 | protected $repository; |
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50 | |||
51 | /** |
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52 | * Texts. |
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53 | * |
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54 | * @var array |
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55 | */ |
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56 | protected $texts; |
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57 | |||
58 | /** |
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59 | * Missing texts. |
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60 | * |
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61 | * @var array |
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62 | */ |
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63 | protected $new_texts; |
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64 | |||
65 | /** |
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66 | * Application scope. |
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67 | * |
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68 | * @var string |
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69 | */ |
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70 | protected $scope = 'global'; |
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71 | |||
72 | /** |
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73 | * Create a new MultiLang instance. |
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74 | * |
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75 | * @param string $environment |
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76 | * @param array $config |
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77 | * @param \Illuminate\Cache\CacheManager $cache |
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78 | * @param \Illuminate\Database\DatabaseManager $db |
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79 | */ |
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80 | 26 | public function __construct($environment, array $config, Cache $cache, Database $db) |
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90 | |||
91 | /** |
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92 | * Set multilang config |
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93 | * |
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94 | * @param array $config |
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95 | * @return $this |
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96 | */ |
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97 | 26 | public function setConfig(array $config) |
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103 | |||
104 | /** |
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105 | * Set repository object |
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106 | * |
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107 | * @param \Longman\LaravelMultiLang\Repository $repository |
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108 | * @return $this |
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109 | */ |
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110 | 26 | public function setRepository(Repository $repository) |
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116 | |||
117 | /** |
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118 | * Get repository object |
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119 | * |
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120 | * @return \Longman\LaravelMultiLang\Repository |
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121 | */ |
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122 | 2 | public function getRepository() |
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126 | |||
127 | /** |
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128 | * Set application scope |
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129 | * |
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130 | * @param $scope |
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131 | * @return $this |
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132 | */ |
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133 | public function setScope($scope) |
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139 | |||
140 | /** |
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141 | * Get application scope |
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142 | * |
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143 | * @return string |
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144 | */ |
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145 | public function getScope() |
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149 | |||
150 | /** |
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151 | * Set locale and load texts |
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152 | * |
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153 | * @param string $lang |
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154 | * @param array $texts |
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155 | * @return void |
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156 | */ |
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157 | 24 | public function setLocale($lang, array $texts = null) |
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158 | { |
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159 | 24 | if (! $lang) { |
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160 | 1 | throw new InvalidArgumentException('Locale is empty'); |
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161 | } |
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162 | 23 | $this->lang = $lang; |
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163 | |||
164 | 23 | if (! is_array($texts)) { |
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165 | 20 | $texts = $this->loadTexts($this->getLocale(), $this->scope); |
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166 | 20 | } |
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167 | |||
168 | 23 | $this->texts = $texts; |
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169 | 23 | } |
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170 | |||
171 | /** |
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172 | * Load texts |
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173 | * |
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174 | * @param string $lang |
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175 | * @param string $scope |
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176 | * @return array |
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177 | */ |
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178 | 20 | public function loadTexts($lang, $scope = null) |
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179 | { |
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180 | 20 | if ($this->environment != 'production' || $this->config->get('cache.enabled', true) === false) { |
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181 | 18 | $texts = $this->repository->loadFromDatabase($lang, $scope); |
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182 | |||
183 | 18 | return $texts; |
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184 | } |
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185 | |||
186 | 3 | if ($this->repository->existsInCache($lang)) { |
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187 | $texts = $this->repository->loadFromCache($lang, $scope); |
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188 | } else { |
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189 | 3 | $texts = $this->repository->loadFromDatabase($lang, $scope); |
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190 | 3 | $this->repository->storeInCache($lang, $texts, $scope); |
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191 | } |
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192 | |||
193 | 3 | return $texts; |
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194 | } |
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195 | |||
196 | /** |
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197 | * Get translated text |
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198 | * |
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199 | * @param string $key |
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200 | * @param array $replace |
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201 | * @return string |
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202 | */ |
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203 | 9 | public function get($key, array $replace = []) |
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224 | |||
225 | /** |
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226 | * Replace markers in text |
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227 | * |
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228 | * @param string $text |
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229 | * @param array $replace |
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230 | * @return string |
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231 | */ |
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232 | 7 | protected function replaceMarkers($text, array $replace = []) |
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240 | |||
241 | /** |
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242 | * Make the place-holder replacements on a line. |
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243 | * |
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244 | * @param string $text |
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245 | * @param array $replace |
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246 | * @return string |
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247 | */ |
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248 | 1 | protected function makeReplacements($text, array $replace) |
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249 | { |
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250 | 1 | $replace = $this->sortReplacements($replace); |
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251 | |||
252 | 1 | foreach ($replace as $key => $value) { |
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253 | 1 | $text = str_replace( |
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254 | 1 | [':' . $key, ':' . Str::upper($key), ':' . Str::ucfirst($key)], |
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255 | 1 | [$value, Str::upper($value), Str::ucfirst($value)], |
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256 | $text |
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257 | 1 | ); |
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258 | 1 | } |
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259 | |||
260 | 1 | return $text; |
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261 | } |
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262 | |||
263 | /** |
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264 | * Sort the replacements array. |
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265 | * |
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266 | * @param array $replace |
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267 | * @return \Illuminate\Support\Collection |
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268 | */ |
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269 | protected function sortReplacements(array $replace) |
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275 | |||
276 | /** |
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277 | * Get redirect url in middleware |
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278 | * |
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279 | * @param \Illuminate\Http\Request $request |
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280 | * @return null|string |
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281 | */ |
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282 | 4 | public function getRedirectUrl(Request $request) |
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283 | { |
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284 | 4 | $locale = $request->segment(1); |
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285 | 4 | $fallback_locale = $this->config->get('default_locale', 'en'); |
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286 | 4 | $exclude_segments = $this->config->get('exclude_segments', []); |
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287 | 4 | if (in_array($locale, $exclude_segments)) { |
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288 | return null; |
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289 | } |
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290 | |||
291 | 4 | if (strlen($locale) == 2) { |
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292 | 3 | $locales = $this->config->get('locales', []); |
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293 | |||
294 | 3 | if (! isset($locales[$locale])) { |
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295 | 2 | $segments = $request->segments(); |
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296 | 2 | $segments[0] = $fallback_locale; |
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297 | 2 | $url = implode('/', $segments); |
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298 | 2 | if ($query_string = $request->server->get('QUERY_STRING')) { |
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299 | 1 | $url .= '?' . $query_string; |
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300 | 1 | } |
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301 | |||
302 | 2 | return $url; |
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303 | } |
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304 | 1 | } else { |
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305 | 1 | $segments = $request->segments(); |
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306 | 1 | $url = $fallback_locale . '/' . implode('/', $segments); |
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307 | 1 | if ($query_string = $request->server->get('QUERY_STRING')) { |
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308 | $url .= '?' . $query_string; |
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309 | } |
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310 | |||
311 | 1 | return $url; |
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312 | } |
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313 | |||
314 | 1 | return null; |
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315 | } |
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316 | |||
317 | /** |
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318 | * Detect locale based on url segment |
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319 | * |
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320 | * @param \Illuminate\Http\Request $request |
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321 | * @return string |
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322 | */ |
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323 | 1 | public function detectLocale(Request $request) |
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334 | |||
335 | /** |
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336 | * Wrap routes to available languages group |
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337 | * |
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338 | * @param \Closure $callback |
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339 | */ |
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340 | public function routeGroup(Closure $callback) |
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341 | { |
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342 | $router = app('router'); |
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343 | |||
344 | $locales = $this->config->get('locales', []); |
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345 | |||
346 | foreach ($locales as $locale => $val) { |
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347 | $router->group([ |
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348 | 'prefix' => $locale, |
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349 | 'as' => $locale . '.', |
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350 | ], $callback); |
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351 | } |
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352 | } |
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353 | |||
354 | /** |
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355 | * Manage texts |
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356 | */ |
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357 | public function manageTextsRoutes() |
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358 | { |
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359 | $router = app('router'); |
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360 | $route = $this->config->get('text-route.route', 'texts'); |
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361 | $controller = $this->config->get( |
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362 | 'text-route.controller', |
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363 | '\Longman\LaravelMultiLang\Controllers\TextsController' |
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364 | ); |
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365 | |||
366 | $router->get( |
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367 | $route, |
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368 | ['uses' => $controller . '@index'] |
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369 | ); |
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370 | $router->post( |
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371 | $route, |
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372 | ['uses' => $controller . '@save'] |
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373 | ); |
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374 | } |
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375 | |||
376 | /** |
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377 | * Get texts |
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378 | * |
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379 | * @return array |
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380 | */ |
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381 | 4 | public function getTexts() |
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386 | |||
387 | /** |
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388 | * Get all texts |
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389 | * |
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390 | * @param string $lang |
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391 | * @param string $scope |
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392 | * @return array |
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393 | */ |
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394 | public function getAllTexts($lang = null, $scope = null) |
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398 | |||
399 | /** |
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400 | * Set texts manually |
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401 | * |
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402 | * @param array $texts_array |
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403 | * @return \Longman\LaravelMultiLang\MultiLang |
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404 | */ |
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405 | 4 | public function setTexts(array $texts_array) |
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406 | { |
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407 | 4 | $texts = []; |
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408 | 4 | foreach ($texts_array as $key => $value) { |
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409 | 4 | $texts[$key] = $value; |
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410 | 4 | } |
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411 | |||
412 | 4 | $this->texts = $texts; |
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413 | |||
414 | 4 | return $this; |
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415 | } |
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416 | |||
417 | /** |
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418 | * Queue missing texts |
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419 | * |
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420 | * @param string $key |
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421 | * @return void |
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422 | */ |
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423 | 4 | protected function queueToSave($key) |
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427 | |||
428 | /** |
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429 | * Get language prefixed url |
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430 | * |
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431 | * @param string $path |
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432 | * @param string $lang |
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433 | * @return string |
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434 | */ |
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435 | 3 | public function getUrl($path, $lang = null) |
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444 | |||
445 | /** |
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446 | * Remove locale from the path |
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447 | * |
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448 | * @param string $path |
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449 | * @return string |
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450 | */ |
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451 | 3 | private function removeLocaleFromPath($path) |
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461 | |||
462 | /** |
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463 | * Get language prefixed route |
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464 | * |
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465 | * @param string $name |
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466 | * @return string |
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467 | */ |
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468 | 1 | public function getRoute($name) |
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477 | |||
478 | /** |
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479 | * Check if autosave allowed |
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480 | * |
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481 | * @return bool |
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482 | */ |
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483 | 5 | public function autoSaveIsAllowed() |
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491 | |||
492 | /** |
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493 | * Get locale |
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494 | * |
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495 | * @return string |
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496 | */ |
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497 | 21 | public function getLocale() |
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501 | |||
502 | /** |
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503 | * Get available locales |
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504 | * |
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505 | * @return array |
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506 | */ |
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507 | 1 | public function getLocales() |
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511 | |||
512 | /** |
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513 | * Save missing texts |
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514 | * |
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515 | * @return bool |
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516 | */ |
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517 | 3 | public function saveTexts() |
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527 | } |
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528 |
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: