Total Complexity | 45 |
Total Lines | 242 |
Duplicated Lines | 0 % |
Changes | 4 | ||
Bugs | 1 | Features | 0 |
Complex classes like DeferBackend 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.
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 DeferBackend, and based on these observations, apply Extract Interface, too.
1 | <?php |
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20 | class DeferBackend extends Requirements_Backend |
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21 | { |
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22 | // It's better to write to the head with defer |
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23 | public $writeJavascriptToBody = false; |
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24 | |||
25 | /** |
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26 | * @return $this |
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27 | */ |
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28 | public static function getDeferBackend() |
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29 | { |
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30 | $backend = Requirements::backend(); |
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31 | if (!$backend instanceof self) { |
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32 | throw new Exception("Requirements backend is currently of class " . get_class($backend)); |
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33 | } |
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34 | return $backend; |
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35 | } |
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36 | |||
37 | /** |
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38 | * @param Requirements_Backend $oldBackend defaults to current backend |
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39 | * @return $this |
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40 | */ |
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41 | public static function replaceBackend(Requirements_Backend $oldBackend = null) |
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42 | { |
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43 | if ($oldBackend === null) { |
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44 | $oldBackend = Requirements::backend(); |
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45 | } |
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46 | $deferBackend = new static; |
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47 | foreach ($oldBackend->getCSS() as $file => $opts) { |
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48 | $deferBackend->css($file, null, $opts); |
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49 | } |
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50 | foreach ($oldBackend->getJavascript() as $file => $opts) { |
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51 | $deferBackend->javascript($file, null, $opts); |
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52 | } |
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53 | foreach ($oldBackend->getCustomCSS() as $id => $script) { |
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54 | $deferBackend->customCSS($script, $id); |
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55 | } |
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56 | foreach ($oldBackend->getCustomScripts() as $id => $script) { |
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57 | $deferBackend->customScript($script, $id); |
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58 | } |
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59 | Requirements::set_backend($deferBackend); |
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60 | return $deferBackend; |
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61 | } |
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62 | |||
63 | /** |
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64 | * Register the given JavaScript file as required. |
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65 | * |
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66 | * @param string $file Either relative to docroot or in the form "vendor/package:resource" |
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67 | * @param array $options List of options. Available options include: |
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68 | * - 'provides' : List of scripts files included in this file |
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69 | * - 'async' : Boolean value to set async attribute to script tag |
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70 | * - 'defer' : Boolean value to set defer attribute to script tag (true by default) |
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71 | * - 'type' : Override script type= value. |
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72 | * - 'integrity' : SubResource Integrity hash |
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73 | * - 'crossorigin' : Cross-origin policy for the resource |
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74 | * - 'cookie-consent' : Type of cookie for conditionnal loading : strictly-necessary,functionality,tracking,targeting |
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75 | */ |
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76 | public function javascript($file, $options = array()) |
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77 | { |
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78 | // We want to defer by default, but we can disable it if needed |
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79 | if (!isset($options['defer'])) { |
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80 | $options['defer'] = true; |
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81 | } |
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82 | if (isset($options['cookie-consent'])) { |
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83 | if (!in_array($options['cookie-consent'], ['strictly-necessary', 'functionality', 'tracking', 'targeting'])) { |
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84 | throw new InvalidArgumentException("The cookie-consent value is invalid, it must be one of: strictly-necessary,functionality,tracking,targeting"); |
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85 | } |
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86 | // switch to text plain for conditional loading |
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87 | $options['type'] = 'text/plain'; |
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88 | } |
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89 | parent::javascript($file, $options); |
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90 | if (isset($options['cookie-consent'])) { |
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91 | $this->javascript[$file]['cookie-consent'] = $options['cookie-consent']; |
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92 | } |
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93 | } |
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94 | |||
95 | /** |
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96 | * @param string $name |
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97 | * @param string|array $type Pass the type or an array of options |
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98 | * @return void |
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99 | */ |
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100 | public function themedJavascript($name, $type = null) |
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101 | { |
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102 | $path = ThemeResourceLoader::inst()->findThemedJavascript($name, SSViewer::get_themes()); |
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103 | if ($path) { |
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104 | $opts = []; |
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105 | if ($type) { |
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106 | if (is_string($type)) { |
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107 | $opts['type'] = $type; |
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108 | } elseif (is_array($type)) { |
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109 | $opts = $type; |
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110 | } |
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111 | } |
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112 | $this->javascript($path, $opts); |
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113 | } else { |
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114 | throw new InvalidArgumentException( |
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115 | "The javascript file doesn't exist. Please check if the file $name.js exists in any " |
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116 | . "context or search for themedJavascript references calling this file in your templates." |
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117 | ); |
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118 | } |
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119 | } |
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120 | |||
121 | /** |
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122 | * @inheritDoc |
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123 | */ |
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124 | public function customScript($script, $uniquenessID = null) |
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125 | { |
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126 | // Wrap script in a DOMContentLoaded |
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127 | // Make sure we don't add the eventListener twice (this will only work for simple scripts) |
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128 | // @link https://stackoverflow.com/questions/41394983/how-to-defer-inline-javascript |
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129 | if (strpos($script, 'window.addEventListener') === false) { |
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130 | $script = "window.addEventListener('DOMContentLoaded', function() { $script });"; |
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131 | } |
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132 | |||
133 | // Remove comments if any |
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134 | $script = preg_replace('/(?:(?:\/\*(?:[^*]|(?:\*+[^*\/]))*\*+\/)|(?:(?<!\:|\\\|\'|\")\/\/.*))/', '', $script); |
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135 | |||
136 | return parent::customScript($script, $uniquenessID); |
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137 | } |
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138 | |||
139 | /** |
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140 | * Get all css files |
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141 | * |
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142 | * @return array |
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143 | */ |
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144 | public function getCSS() |
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158 | } |
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159 | |||
160 | /** |
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161 | * Update the given HTML content with the appropriate include tags for the registered |
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162 | * requirements. Needs to receive a valid HTML/XHTML template in the $content parameter, |
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163 | * including a head and body tag. |
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164 | * |
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165 | * @param string $content HTML content that has already been parsed from the $templateFile through {@link SSViewer} |
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166 | * @return string HTML content augmented with the requirements tags |
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167 | */ |
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168 | public function includeInHTML($content) |
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264 |
This check compares calls to functions or methods with their respective definitions. If the call has more arguments than are defined, it raises an issue.
If a function is defined several times with a different number of parameters, the check may pick up the wrong definition and report false positives. One codebase where this has been known to happen is Wordpress. Please note the @ignore annotation hint above.