eventespresso /
event-espresso-core
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:
Complex classes like EEH_Template 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 EEH_Template, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 62 | class EEH_Template { |
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| 63 | |||
| 64 | private static $_espresso_themes = array(); |
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| 65 | |||
| 66 | |||
| 67 | /** |
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| 68 | * is_espresso_theme - returns TRUE or FALSE on whether the currently active WP theme is an espresso theme |
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| 69 | * |
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| 70 | * @return boolean |
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| 71 | */ |
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| 72 | public static function is_espresso_theme() { |
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| 73 | return wp_get_theme()->get( 'TextDomain' ) == 'event_espresso' ? TRUE : FALSE; |
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| 74 | } |
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| 75 | |||
| 76 | /** |
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| 77 | * load_espresso_theme_functions - if current theme is an espresso theme, or uses ee theme template parts, then load it's functions.php file ( if not already loaded ) |
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| 78 | * |
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| 79 | * @return void |
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| 80 | */ |
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| 81 | public static function load_espresso_theme_functions() { |
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| 82 | if ( ! defined( 'EE_THEME_FUNCTIONS_LOADED' )) { |
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| 83 | if ( is_readable( EE_PUBLIC . EE_Config::get_current_theme() . DS . 'functions.php' )) { |
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| 84 | require_once( EE_PUBLIC . EE_Config::get_current_theme() . DS . 'functions.php' ); |
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| 85 | } |
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| 86 | } |
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| 87 | } |
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| 88 | |||
| 89 | |||
| 90 | /** |
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| 91 | * get_espresso_themes - returns an array of Espresso Child themes located in the /templates/ directory |
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| 92 | * |
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| 93 | * @return array |
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| 94 | */ |
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| 95 | public static function get_espresso_themes() { |
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| 96 | if ( empty( EEH_Template::$_espresso_themes )) { |
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| 97 | $espresso_themes = glob( EE_PUBLIC . '*', GLOB_ONLYDIR ); |
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| 98 | if ( empty( $espresso_themes ) ) { |
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| 99 | return array(); |
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| 100 | } |
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| 101 | if (( $key = array_search( 'global_assets', $espresso_themes )) !== FALSE ) { |
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| 102 | unset( $espresso_themes[ $key ] ); |
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| 103 | } |
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| 104 | EEH_Template::$_espresso_themes = array(); |
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| 105 | foreach ( $espresso_themes as $espresso_theme ) { |
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| 106 | EEH_Template::$_espresso_themes[ basename( $espresso_theme ) ] = $espresso_theme; |
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| 107 | } |
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| 108 | } |
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| 109 | return EEH_Template::$_espresso_themes; |
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| 110 | } |
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| 111 | |||
| 112 | |||
| 113 | |||
| 114 | /** |
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| 115 | * EEH_Template::get_template_part |
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| 116 | * basically a copy of the WordPress get_template_part() function but uses EEH_Template::locate_template() instead, and doesn't add base versions of files |
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| 117 | * so not a very useful function at all except that it adds familiarity PLUS filtering based off of the entire template part name |
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| 118 | * |
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| 119 | * @param string $slug The slug name for the generic template. |
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| 120 | * @param string $name The name of the specialised template. |
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| 121 | * @param array $template_args |
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| 122 | * @param bool $return_string |
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| 123 | * @return string the html output for the formatted money value |
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| 124 | */ |
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| 125 | public static function get_template_part( $slug = NULL, $name = NULL, $template_args = array(), $return_string = FALSE ) { |
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| 126 | do_action( "get_template_part_{$slug}-{$name}", $slug, $name ); |
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| 127 | $templates = array(); |
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| 128 | $name = (string) $name; |
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| 129 | if ( $name != '' ) { |
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| 130 | $templates[] = "{$slug}-{$name}.php"; |
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| 131 | } |
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| 132 | // allow template parts to be turned off via something like: add_filter( 'FHEE__content_espresso_events_tickets_template__display_datetimes', '__return_false' ); |
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| 133 | if ( apply_filters( "FHEE__EEH_Template__get_template_part__display__{$slug}_{$name}", TRUE )) { |
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| 134 | EEH_Template::locate_template( $templates, $template_args, TRUE, $return_string ); |
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| 135 | } |
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| 136 | } |
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| 137 | |||
| 138 | |||
| 139 | |||
| 140 | /** |
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| 141 | * locate_template |
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| 142 | * |
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| 143 | * locate a template file by looking in the following places, in the following order: |
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| 144 | * <server path up to>/wp-content/themes/<current active WordPress theme>/ |
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| 145 | * <assumed full absolute server path> |
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| 146 | * <server path up to>/wp-content/uploads/espresso/templates/<current EE theme>/ |
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| 147 | * <server path up to>/wp-content/uploads/espresso/templates/ |
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| 148 | * <server path up to>/wp-content/plugins/<EE4 folder>/public/<current EE theme>/ |
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| 149 | * <server path up to>/wp-content/plugins/<EE4 folder>/core/templates/<current EE theme>/ |
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| 150 | * <server path up to>/wp-content/plugins/<EE4 folder>/ |
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| 151 | * as soon as the template is found in one of these locations, it will be returned or loaded |
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| 152 | * |
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| 153 | * Example: |
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| 154 | * You are using the WordPress Twenty Sixteen theme, |
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| 155 | * and you want to customize the "some-event.template.php" template, |
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| 156 | * which is located in the "/relative/path/to/" folder relative to the main EE plugin folder. |
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| 157 | * Assuming WP is installed on your server in the "/home/public_html/" folder, |
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| 158 | * EEH_Template::locate_template() will look at the following paths in order until the template is found: |
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| 159 | * |
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| 160 | * /home/public_html/wp-content/themes/twentysixteen/some-event.template.php |
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| 161 | * /relative/path/to/some-event.template.php |
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| 162 | * /home/public_html/wp-content/uploads/espresso/templates/Espresso_Arabica_2014/relative/path/to/some-event.template.php |
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| 163 | * /home/public_html/wp-content/uploads/espresso/templates/relative/path/to/some-event.template.php |
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| 164 | * /home/public_html/wp-content/plugins/event-espresso-core-reg/public/Espresso_Arabica_2014/relative/path/to/some-event.template.php |
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| 165 | * /home/public_html/wp-content/plugins/event-espresso-core-reg/core/templates/Espresso_Arabica_2014/relative/path/to/some-event.template.php |
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| 166 | * /home/public_html/wp-content/plugins/event-espresso-core-reg/relative/path/to/some-event.template.php |
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| 167 | * |
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| 168 | * Had you passed an absolute path to your template that was in some other location, |
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| 169 | * ie: "/absolute/path/to/some-event.template.php" |
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| 170 | * then the search would have been : |
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| 171 | * |
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| 172 | * /home/public_html/wp-content/themes/twentysixteen/some-event.template.php |
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| 173 | * /absolute/path/to/some-event.template.php |
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| 174 | * |
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| 175 | * and stopped there upon finding it in the second location |
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| 176 | * |
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| 177 | * @param array|string $templates array of template file names including extension (or just a single string) |
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| 178 | * @param array $template_args an array of arguments to be extracted for use in the template |
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| 179 | * @param boolean $load whether to pass the located template path on to the EEH_Template::display_template() method or simply return it |
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| 180 | * @param boolean $return_string whether to send output immediately to screen, or capture and return as a string |
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| 181 | * @param boolean $check_if_custom If TRUE, this flags this method to return boolean for whether this will generate a custom template or not. |
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| 182 | * Used in places where you don't actually load the template, you just want to know if there's a custom version of it. |
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| 183 | * @return mixed |
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| 184 | */ |
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| 185 | public static function locate_template( $templates = array(), $template_args = array(), $load = TRUE, $return_string = TRUE, $check_if_custom = FALSE ) { |
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| 289 | |||
| 290 | |||
| 291 | |||
| 292 | /** |
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| 293 | * _find_common_base_path |
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| 294 | * |
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| 295 | * given two paths, this determines if there is a common base path between the two |
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| 296 | * |
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| 297 | * @param array $paths |
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| 298 | * @return string |
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| 299 | */ |
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| 300 | protected static function _find_common_base_path( $paths ) { |
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| 316 | |||
| 317 | |||
| 318 | |||
| 319 | /** |
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| 320 | * load and display a template |
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| 321 | * @param bool|string $template_path server path to the file to be loaded, including file name and extension |
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| 322 | * @param array $template_args an array of arguments to be extracted for use in the template |
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| 323 | * @param boolean $return_string whether to send output immediately to screen, or capture and return as a string |
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| 324 | * @return mixed string |
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| 325 | */ |
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| 326 | public static function display_template( $template_path = FALSE, $template_args = array(), $return_string = FALSE ) { |
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| 360 | |||
| 361 | |||
| 362 | |||
| 363 | |||
| 364 | |||
| 365 | /** |
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| 366 | * get_object_css_class - attempts to generate a css class based on the type of EE object passed |
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| 367 | * |
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| 368 | * |
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| 369 | * @param EE_Base_Class $object the EE object the css class is being generated for |
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| 370 | * @param string $prefix added to the beginning of the generated class |
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| 371 | * @param string $suffix added to the end of the generated class |
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| 372 | * @return string |
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| 373 | */ |
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| 374 | public static function get_object_css_class( $object = NULL, $prefix = '', $suffix = '' ) { |
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| 396 | |||
| 397 | |||
| 398 | |||
| 399 | /** |
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| 400 | * EEH_Template::format_currency |
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| 401 | * This helper takes a raw float value and formats it according to the default config country currency settings, or the country currency settings from the supplied country ISO code |
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| 402 | * |
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| 403 | * @param float $amount raw money value |
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| 404 | * @param boolean $return_raw whether to return the formatted float value only with no currency sign or code |
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| 405 | * @param boolean $display_code whether to display the country code (USD). Default = TRUE |
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| 406 | * @param string $CNT_ISO 2 letter ISO code for a country |
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| 407 | * @param string $cur_code_span_class |
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| 408 | * @return string the html output for the formatted money value |
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| 409 | */ |
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| 410 | public static function format_currency( $amount = NULL, $return_raw = FALSE, $display_code = TRUE, $CNT_ISO = '', $cur_code_span_class = 'currency-code' ) { |
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| 457 | |||
| 458 | |||
| 459 | |||
| 460 | |||
| 461 | /** |
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| 462 | * This function is used for outputting the localized label for a given status id in the schema requested (and possibly plural). The intended use of this function is only for cases where wanting a label outside of a related status model or model object (i.e. in documentation etc.) |
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| 463 | * @param string $status_id Status ID matching a registered status in the esp_status table. If there is no match, then 'Unknown' will be returned. |
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| 464 | * @param boolean $plural Whether to return plural or not |
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| 465 | * @param string $schema 'UPPER', 'lower', or 'Sentence' |
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| 466 | * @return string The localized label for the status id. |
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| 467 | */ |
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| 468 | public static function pretty_status( $status_id, $plural = FALSE, $schema = 'upper' ) { |
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| 474 | |||
| 475 | |||
| 476 | |||
| 477 | /** |
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| 478 | * This helper just returns a button or link for the given parameters |
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| 479 | * @param string $url the url for the link |
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| 480 | * @param string $label What is the label you want displayed for the button |
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| 481 | * @param string $class what class is used for the button (defaults to 'button-primary') |
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| 482 | * @param string $icon |
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| 483 | * @return string the html output for the button |
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| 484 | */ |
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| 485 | public static function get_button_or_link( $url, $label, $class = 'button-primary', $icon = '' ) { |
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| 490 | |||
| 491 | |||
| 492 | |||
| 493 | /** |
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| 494 | * This returns a generated link that will load the related help tab on admin pages. |
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| 495 | * |
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| 496 | * |
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| 497 | * @param string $help_tab_id the id for the connected help tab |
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| 498 | * @param bool|string $page The page identifier for the page the help tab is on |
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| 499 | * @param bool|string $action The action (route) for the admin page the help tab is on. |
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| 500 | * @param bool|string $icon_style (optional) include css class for the style you want to use for the help icon. |
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| 501 | * @param bool|string $help_text (optional) send help text you want to use for the link if default not to be used |
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| 502 | * @return string generated link |
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| 503 | */ |
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| 504 | public static function get_help_tab_link( $help_tab_id, $page = FALSE, $action = FALSE, $icon_style = FALSE, $help_text = FALSE ) { |
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| 520 | |||
| 521 | |||
| 522 | |||
| 523 | /** |
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| 524 | * This helper generates the html structure for the jquery joyride plugin with the given params. |
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| 525 | * @link http://zurb.com/playground/jquery-joyride-feature-tour-plugin |
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| 526 | * @see EE_Admin_Page->_stop_callback() for the construct expected for the $stops param. |
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| 527 | * @param EE_Help_Tour |
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| 528 | * @return string html |
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| 529 | */ |
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| 530 | public static function help_tour_stops_generator( EE_Help_Tour $tour ) { |
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| 568 | |||
| 569 | |||
| 570 | |||
| 571 | /** |
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| 572 | * This is a helper method to generate a status legend for a given status array. |
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| 573 | * Note this will only work if the incoming statuses have a key in the EEM_Status->localized_status() methods status_array. |
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| 574 | * |
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| 575 | * @param array $status_array array of statuses that will make up the legend. In format: |
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| 576 | * array( |
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| 577 | * 'status_item' => 'status_name' |
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| 578 | * ) |
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| 579 | * @param string $active_status This is used to indicate what the active status is IF that is to be highlighted in the legend. |
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| 580 | * @throws EE_Error |
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| 581 | * @return string html structure for status. |
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| 582 | */ |
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| 583 | public static function status_legend( $status_array, $active_status = '' ) { |
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| 610 | |||
| 611 | |||
| 612 | |||
| 613 | /** |
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| 614 | * Gets HTML for laying out a deeply-nested array (and objects) in a format |
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| 615 | * that's nice for presenting in the wp admin |
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| 616 | * @param mixed $data |
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| 617 | * @return string |
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| 618 | */ |
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| 619 | public static function layout_array_as_table($data) { |
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| 663 | |||
| 664 | |||
| 665 | |||
| 666 | /** |
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| 667 | * wrapper for self::get_paging_html() that simply echos the generated paging html |
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| 668 | * |
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| 669 | * @since 4.4.0 |
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| 670 | * @see self:get_paging_html() for argument docs. |
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| 671 | * @param $total_items |
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| 672 | * @param $current |
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| 673 | * @param $per_page |
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| 674 | * @param $url |
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| 675 | * @param bool $show_num_field |
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| 676 | * @param string $paged_arg_name |
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| 677 | * @param array $items_label |
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| 678 | * |
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| 679 | * @return string |
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| 680 | */ |
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| 681 | public static function paging_html( $total_items, $current, $per_page, $url, $show_num_field = TRUE, $paged_arg_name = 'paged', $items_label = array() ) { |
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| 684 | |||
| 685 | |||
| 686 | |||
| 687 | /** |
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| 688 | * A method for generating paging similar to WP_List_Table |
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| 689 | * |
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| 690 | * @since 4.4.0 |
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| 691 | * @see wp-admin/includes/class-wp-list-table.php WP_List_Table::pagination() |
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| 692 | * |
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| 693 | * @param integer $total_items How many total items there are to page. |
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| 694 | * @param integer $current What the current page is. |
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| 695 | * @param integer $per_page How many items per page. |
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| 696 | * @param string $url What the base url for page links is. |
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| 697 | * @param boolean $show_num_field Whether to show the input for changing page number. |
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| 698 | * @param string $paged_arg_name The name of the key for the paged query argument. |
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| 699 | * @param array $items_label An array of singular/plural values for the items label: |
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| 700 | * array( |
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| 701 | * 'single' => 'item', |
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| 702 | * 'plural' => 'items' |
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| 703 | * ) |
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| 704 | * @return string |
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| 705 | */ |
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| 706 | public static function get_paging_html( $total_items, $current, $per_page, $url, $show_num_field = TRUE, $paged_arg_name = 'paged', $items_label = array() ) { |
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| 814 | |||
| 815 | |||
| 816 | } //end EEH_Template class |
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| 817 | |||
| 857 | } |
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If you define a variable conditionally, it can happen that it is not defined for all execution paths.
Let’s take a look at an example:
In the above example, the variable $x is defined if you pass “foo” or “bar” as argument for $a. However, since the switch statement has no default case statement, if you pass any other value, the variable $x would be undefined.
Available Fixes
Check for existence of the variable explicitly:
Define a default value for the variable:
Add a value for the missing path: