Complex classes like themes 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 themes, and based on these observations, apply Extract Interface, too.
| 1 | <?php  | 
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| 20 | trait themes { | 
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| 21 | /**  | 
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| 22 | * @param \cs\Request $Request  | 
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| 23 | *  | 
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| 24 | * @throws ExitException  | 
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| 25 | */  | 
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| 26 | 	static function admin_themes_get ($Request) { | 
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| 27 | 		if ($Request->route_path(3) == 'update_dependencies') { | 
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| 28 | /**  | 
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| 29 | * Get dependencies for theme during update  | 
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| 30 | */  | 
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| 31 | static::get_update_dependencies_for_theme($Request->route_path[2]);  | 
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| 32 | 		} elseif ($Request->route_path(2) == 'current') { | 
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| 33 | /**  | 
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| 34 | * Get current theme  | 
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| 35 | */  | 
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| 36 | static::get_current_theme();  | 
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| 37 | 		} else { | 
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| 38 | /**  | 
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| 39 | * Get array of themes in extended form  | 
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| 40 | */  | 
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| 41 | static::get_themes_list();  | 
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| 42 | }  | 
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| 43 | }  | 
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| 44 | /**  | 
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| 45 | * @param string $theme  | 
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| 46 | *  | 
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| 47 | * @throws ExitException  | 
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| 48 | */  | 
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| 49 | 	protected static function get_update_dependencies_for_theme ($theme) { | 
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| 108 | /**  | 
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| 109 | * @param array $theme  | 
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| 110 | * @param string $feature  | 
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| 111 | */  | 
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| 112 | 	protected static function check_theme_feature_availability (&$theme, $feature) { | 
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| 124 | /**  | 
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| 125 | * @param \cs\Request $Request  | 
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| 126 | *  | 
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| 127 | * @throws ExitException  | 
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| 128 | */  | 
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| 129 | 	static function admin_themes_put ($Request) { | 
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| 142 | /**  | 
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| 143 | * Provides next events:  | 
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| 144 | * admin/System/components/themes/current/before  | 
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| 145 | * ['name' => theme_name]  | 
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| 146 | *  | 
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| 147 | * admin/System/components/themes/current/after  | 
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| 148 | * ['name' => theme_name]  | 
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| 149 | *  | 
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| 150 | * @param string $theme  | 
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| 151 | *  | 
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| 152 | * @throws ExitException  | 
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| 153 | */  | 
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| 154 | 	protected static function set_current_theme ($theme) { | 
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| 183 | /**  | 
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| 184 | * Extract uploaded theme  | 
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| 185 | *  | 
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| 186 | * @throws ExitException  | 
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| 187 | */  | 
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| 188 | 	static function admin_themes_extract () { | 
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| 206 | /**  | 
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| 207 | * Update theme  | 
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| 208 | *  | 
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| 209 | * Provides next events:  | 
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| 210 | * admin/System/components/themes/update/before  | 
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| 211 | * ['name' => theme_name]  | 
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| 212 | *  | 
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| 213 | * admin/System/components/themes/update/after  | 
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| 214 | * ['name' => theme_name]  | 
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| 215 | *  | 
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| 216 | * @param \cs\Request $Request  | 
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| 217 | *  | 
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| 218 | * @throws ExitException  | 
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| 219 | */  | 
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| 220 | 	static function admin_themes_update ($Request) { | 
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| 266 | /**  | 
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| 267 | * Delete theme completely  | 
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| 268 | *  | 
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| 269 | * @param \cs\Request $Request  | 
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| 270 | *  | 
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| 271 | * @throws ExitException  | 
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| 272 | */  | 
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| 273 | 	static function admin_themes_delete ($Request) { | 
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| 288 | }  | 
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| 289 |