Complex classes like MapsDisplayMapRenderer 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 MapsDisplayMapRenderer, and based on these observations, apply Extract Interface, too.
1 | <?php |
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13 | class MapsDisplayMapRenderer { |
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14 | |||
15 | /** |
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16 | * @since 2.0 |
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17 | * |
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18 | * @var iMappingService |
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19 | */ |
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20 | protected $service; |
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21 | |||
22 | /** |
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23 | * Constructor. |
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24 | * |
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25 | * @param iMappingService $service |
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26 | */ |
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27 | public function __construct( iMappingService $service ) { |
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28 | $this->service = $service; |
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29 | } |
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30 | |||
31 | /** |
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32 | * Returns the HTML to display the map. |
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33 | * |
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34 | * @since 2.0 |
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35 | * |
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36 | * @param array $params |
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37 | * @param Parser $parser |
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38 | * @param string $mapName |
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39 | * |
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40 | * @return string |
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41 | */ |
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42 | protected function getMapHTML( array $params, Parser $parser, $mapName ) { |
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58 | |||
59 | /** |
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60 | * Returns a PHP object to encode to JSON with the map data. |
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61 | * |
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62 | * @since 2.0 |
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63 | * |
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64 | * @param array $params |
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65 | * @param Parser $parser |
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66 | * |
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67 | * @return mixed |
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68 | */ |
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69 | protected function getJSONObject( array $params, Parser $parser ) { |
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70 | return $params; |
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71 | } |
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72 | |||
73 | /** |
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74 | * Handles the request from the parser hook by doing the work that's common for all |
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75 | * mapping services, calling the specific methods and finally returning the resulting output. |
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76 | * |
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77 | * @param array $params |
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78 | * @param Parser $parser |
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79 | * |
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80 | * @return string |
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81 | */ |
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82 | public final function renderMap( array $params, Parser $parser ) { |
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83 | $this->handleMarkerData( $params, $parser ); |
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84 | |||
85 | $mapName = $this->service->getMapId(); |
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86 | |||
87 | $output = $this->getMapHTML( $params, $parser, $mapName ); |
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88 | |||
89 | $configVars = Skin::makeVariablesScript( $this->service->getConfigVariables() ); |
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90 | |||
91 | $this->service->addDependencies( $parser ); |
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92 | $parser->getOutput()->addHeadItem( $configVars ); |
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93 | |||
94 | return $output; |
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95 | } |
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96 | |||
97 | /** |
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98 | * Converts the data in the coordinates parameter to JSON-ready objects. |
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99 | * These get stored in the locations parameter, and the coordinates on gets deleted. |
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100 | * |
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101 | * FIXME: complexity |
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102 | * |
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103 | * @since 1.0 |
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104 | * |
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105 | * @param array &$params |
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106 | * @param Parser $parser |
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107 | */ |
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108 | protected function handleMarkerData( array &$params, Parser $parser ) { |
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109 | if ( is_object( $params['centre'] ) ) { |
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110 | $params['centre'] = $params['centre']->getJSONObject(); |
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111 | } |
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112 | |||
113 | $parserClone = clone $parser; |
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114 | |||
115 | if ( is_object( $params['wmsoverlay'] ) ) { |
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116 | $params['wmsoverlay'] = $params['wmsoverlay']->getJSONObject(); |
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117 | } |
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118 | |||
119 | $iconUrl = MapsMapper::getFileUrl( $params['icon'] ); |
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120 | $visitedIconUrl = MapsMapper::getFileUrl( $params['visitedicon'] ); |
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121 | $params['locations'] = []; |
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122 | |||
123 | /** |
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124 | * @var Location $location |
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125 | */ |
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126 | foreach ( $params['coordinates'] as $location ) { |
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127 | $jsonObj = $location->getJSONObject( $params['title'], $params['label'], $iconUrl, '', '',$visitedIconUrl); |
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128 | |||
129 | $jsonObj['title'] = $parserClone->parse( $jsonObj['title'], $parserClone->getTitle(), new ParserOptions() )->getText(); |
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130 | $jsonObj['text'] = $parserClone->parse( $jsonObj['text'], $parserClone->getTitle(), new ParserOptions() )->getText(); |
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131 | $jsonObj['inlineLabel'] = strip_tags($parserClone->parse( $jsonObj['inlineLabel'], $parserClone->getTitle(), new ParserOptions() )->getText(),'<a><img>'); |
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132 | |||
133 | $hasTitleAndtext = $jsonObj['title'] !== '' && $jsonObj['text'] !== ''; |
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134 | $jsonObj['text'] = ( $hasTitleAndtext ? '<b>' . $jsonObj['title'] . '</b><hr />' : $jsonObj['title'] ) . $jsonObj['text']; |
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135 | $jsonObj['title'] = strip_tags( $jsonObj['title'] ); |
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136 | |||
137 | $params['locations'][] = $jsonObj; |
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138 | } |
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139 | |||
140 | unset( $params['coordinates'] ); |
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141 | |||
142 | $this->handleShapeData( $params, $parserClone ); |
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143 | |||
144 | if ( $params['mappingservice'] === 'openlayers' ) { |
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145 | $params['layers'] = self::evilOpenLayersHack( $params['layers'] ); |
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146 | } |
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147 | } |
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148 | |||
149 | protected function handleShapeData( array &$params, Parser $parserClone ) { |
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175 | |||
176 | /** |
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177 | * FIXME |
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178 | * |
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179 | * Temporary hack until the mapping service handling gets a proper refactor |
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180 | * This kind of JS construction is also rather evil and should not be done at this point |
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181 | * |
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182 | * @since 3.0 |
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183 | * @deprecated |
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184 | * |
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185 | * @param string[] $layers |
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186 | * |
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187 | * @return string[] |
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188 | */ |
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189 | public static function evilOpenLayersHack( $layers ) { |
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290 | |||
291 | /** |
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292 | * FIXME |
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293 | * @see evilOpenLayersHack |
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294 | */ |
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295 | private static function getLayerDependencies( array $layerNames ) { |
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311 | |||
312 | } |
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313 |
This check looks from parameters that have been defined for a function or method, but which are not used in the method body.