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:
1 | <?php |
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22 | class Event extends Calculations_Base { |
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23 | |||
24 | /** |
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25 | * Calculates the total spaces on the event (not subtracting sales, but taking |
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26 | * sales into account; so this is the optimum sales that CAN still be achieved) |
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27 | * See EE_Event::total_available_spaces( true ); |
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28 | * |
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29 | * @param array $wpdb_row |
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30 | * @param \WP_REST_Request $request |
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31 | * @param Base $controller |
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32 | * @return int |
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33 | * @throws \EE_Error |
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34 | */ |
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35 | View Code Duplication | public static function optimum_sales_at_start( $wpdb_row, $request, $controller ){ |
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53 | |||
54 | |||
55 | |||
56 | /** |
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57 | * Calculates the total spaces on the event (ignoring all sales; so this is the optimum |
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58 | * sales that COULD have been achieved) |
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59 | * See EE_Event::total_available_spaces( true ); |
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60 | * |
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61 | * @param array $wpdb_row |
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62 | * @param \WP_REST_Request $request |
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63 | * @param Base $controller |
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64 | * @return int |
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65 | * @throws \EE_Error |
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66 | */ |
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67 | View Code Duplication | public static function optimum_sales_now( $wpdb_row, $request, $controller ){ |
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85 | |||
86 | |||
87 | |||
88 | /** |
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89 | * Like optimum_sales_now, but minus total sales so far. |
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90 | * See EE_Event::spaces_remaining_for_sale( true ); |
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91 | * |
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92 | * @param array $wpdb_row |
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93 | * @param \WP_REST_Request $request |
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94 | * @param Base $controller |
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95 | * @return int |
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96 | * @throws \EE_Error |
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97 | */ |
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98 | View Code Duplication | public static function spaces_remaining( $wpdb_row, $request, $controller ){ |
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116 | |||
117 | |||
118 | |||
119 | /** |
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120 | * Counts the number of approved registrations for this event (regardless |
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121 | * of how many datetimes each registrations' ticket purchase is for) |
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122 | * |
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123 | * @param array $wpdb_row |
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124 | * @param \WP_REST_Request $request |
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125 | * @param Base $controller |
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126 | * @return int |
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127 | * @throws \EE_Error |
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128 | */ |
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129 | View Code Duplication | public static function spots_taken( $wpdb_row, $request, $controller ){ |
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149 | |||
150 | |||
151 | |||
152 | /** |
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153 | * Counts the number of pending-payment registrations for this event (regardless |
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154 | * of how many datetimes each registrations' ticket purchase is for) |
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155 | * |
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156 | * @param array $wpdb_row |
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157 | * @param \WP_REST_Request $request |
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158 | * @param Base $controller |
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159 | * @return int |
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160 | * @throws \EE_Error |
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161 | * @throws \EventEspresso\core\libraries\rest_api\Rest_Exception |
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162 | */ |
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163 | View Code Duplication | public static function spots_taken_pending_payment( $wpdb_row, $request, $controller ){ |
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184 | |||
185 | |||
186 | |||
187 | /** |
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188 | * Counts all the registrations who have checked into one of this events' datetimes |
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189 | * See EE_Event::total_available_spaces( false ); |
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190 | * |
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191 | * @param array $wpdb_row |
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192 | * @param \WP_REST_Request $request |
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193 | * @param Base $controller |
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194 | * @return int|null if permission denied |
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195 | * @throws \EE_Error |
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196 | * @throws \EventEspresso\core\libraries\rest_api\Rest_Exception |
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197 | */ |
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198 | View Code Duplication | public static function registrations_checked_in_count( $wpdb_row, $request, $controller ){ |
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210 | |||
211 | |||
212 | |||
213 | /** |
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214 | * Counts all the registrations who have checked out of one of this events' datetimes |
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215 | * See EE_Event::total_available_spaces( false ); |
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216 | * |
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217 | * @param array $wpdb_row |
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218 | * @param \WP_REST_Request $request |
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219 | * @param Base $controller |
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220 | * @return int |
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221 | * @throws \EE_Error |
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222 | * @throws \EventEspresso\core\libraries\rest_api\Rest_Exception |
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223 | */ |
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224 | View Code Duplication | public static function registrations_checked_out_count( $wpdb_row, $request, $controller ){ |
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236 | |||
237 | /** |
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238 | * Gets the thumbnail image |
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239 | * @param array $wpdb_row |
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240 | * @param \WP_REST_Request $request |
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241 | * @param Base $controller |
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242 | * @return array |
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243 | */ |
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244 | public static function image_thumbnail( $wpdb_row, $request, $controller ) { |
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247 | |||
248 | /** |
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249 | * Gets the medium image |
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250 | * @param array $wpdb_row |
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251 | * @param \WP_REST_Request $request |
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252 | * @param Base $controller |
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253 | * @return array |
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254 | */ |
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255 | public static function image_medium( $wpdb_row, $request, $controller ) { |
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258 | |||
259 | /** |
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260 | * Gets the medium-large image |
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261 | * @param array $wpdb_row |
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262 | * @param \WP_REST_Request $request |
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263 | * @param Base $controller |
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264 | * @return array |
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265 | */ |
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266 | public static function image_medium_large( $wpdb_row, $request, $controller ) { |
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269 | |||
270 | /** |
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271 | * Gets the large image |
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272 | * @param array $wpdb_row |
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273 | * @param \WP_REST_Request $request |
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274 | * @param Base $controller |
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275 | * @return array |
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276 | */ |
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277 | public static function image_large( $wpdb_row, $request, $controller ) { |
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280 | |||
281 | /** |
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282 | * Gets the post-thumbnail image |
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283 | * @param array $wpdb_row |
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284 | * @param \WP_REST_Request $request |
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285 | * @param Base $controller |
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286 | * @return array |
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287 | */ |
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288 | public static function image_post_thumbnail( $wpdb_row, $request, $controller ) { |
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291 | |||
292 | /** |
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293 | * Gets the full size image |
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294 | * @param array $wpdb_row |
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295 | * @param \WP_REST_Request $request |
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296 | * @param Base $controller |
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297 | * @return array |
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298 | */ |
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299 | public static function image_full( $wpdb_row, $request, $controller ) { |
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302 | |||
303 | /** |
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304 | * Gets image specs and formats them for the display in the API, |
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305 | * according to the image size requested |
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306 | * @param int $EVT_ID |
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307 | * @param string $image_size one of these: thumbnail, medium, medium_large, large, post-thumbnail, full |
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308 | * @return array|false if no such image exists. If array it will have keys 'url', 'width', 'height' and 'original' |
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309 | */ |
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310 | protected static function _calculate_image_data( $EVT_ID, $image_size ) { |
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328 | } |
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329 |
Let’s assume that you have a directory layout like this:
and let’s assume the following content of
Bar.php
:If both files
OtherDir/Foo.php
andSomeDir/Foo.php
are loaded in the same runtime, you will see a PHP error such as the following:PHP Fatal error: Cannot use SomeDir\Foo as Foo because the name is already in use in OtherDir/Foo.php
However, as
OtherDir/Foo.php
does not necessarily have to be loaded and the error is only triggered if it is loaded beforeOtherDir/Bar.php
, this problem might go unnoticed for a while. In order to prevent this error from surfacing, you must import the namespace with a different alias: