gravityview /
GravityView
Complex classes like GravityView_Duplicate_Entry 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 GravityView_Duplicate_Entry, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 22 | final class GravityView_Duplicate_Entry { |
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| 23 | |||
| 24 | /** |
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| 25 | * @var string The location of this file. |
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| 26 | */ |
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| 27 | static $file; |
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| 28 | |||
| 29 | /** |
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| 30 | * @var GravityView_Duplicate_Entry This instance. |
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| 31 | */ |
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| 32 | static $instance; |
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| 33 | |||
| 34 | /** |
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| 35 | * @var array Global entry state. |
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| 36 | */ |
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| 37 | var $entry; |
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| 38 | |||
| 39 | var $view_id; |
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| 40 | |||
| 41 | 1 | function __construct() { |
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| 42 | |||
| 43 | 1 | self::$file = plugin_dir_path( __FILE__ ); |
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| 44 | 1 | $this->add_hooks(); |
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| 45 | 1 | } |
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| 46 | |||
| 47 | /** |
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| 48 | * @since 2.5 |
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| 49 | */ |
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| 50 | 1 | private function add_hooks() { |
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| 51 | |||
| 52 | 1 | add_action( 'wp', array( $this, 'process_duplicate' ), 10000 ); |
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| 53 | |||
| 54 | 1 | add_filter( 'gravityview_entry_default_fields', array( $this, 'add_default_field' ), 10, 3 ); |
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| 55 | |||
| 56 | 1 | add_action( 'gravityview_before', array( $this, 'display_message' ) ); |
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| 57 | |||
| 58 | // For the Duplicate Entry Link, you don't want visible to all users. |
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| 59 | 1 | add_filter( 'gravityview_field_visibility_caps', array( $this, 'modify_visibility_caps' ), 10, 5 ); |
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| 60 | |||
| 61 | // Modify the field options based on the name of the field type |
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| 62 | 1 | add_filter( 'gravityview_template_duplicate_link_options', array( $this, 'duplicate_link_field_options' ), 10, 5 ); |
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| 63 | |||
| 64 | // add template path to check for field |
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| 65 | 1 | add_filter( 'gravityview_template_paths', array( $this, 'add_template_path' ) ); |
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| 66 | 1 | } |
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| 67 | |||
| 68 | /** |
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| 69 | * Return the instantiated class object |
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| 70 | * |
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| 71 | * @since 2.5 |
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| 72 | * @return GravityView_Duplicate_Entry |
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| 73 | */ |
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| 74 | 2 | static public function getInstance() { |
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| 75 | |||
| 76 | 2 | if ( empty( self::$instance ) ) { |
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| 77 | 1 | self::$instance = new self; |
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| 78 | } |
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| 79 | |||
| 80 | 2 | return self::$instance; |
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| 81 | } |
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| 82 | |||
| 83 | /** |
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| 84 | * Include this extension templates path |
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| 85 | * |
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| 86 | * @since 2.5 |
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| 87 | * |
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| 88 | * @param array $file_paths List of template paths ordered |
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| 89 | * |
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| 90 | * @return array File paths, with duplicate field path added at index 117 |
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| 91 | */ |
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| 92 | 2 | public function add_template_path( $file_paths ) { |
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| 100 | |||
| 101 | /** |
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| 102 | * Add "Duplicate Link Text" setting to the edit_link field settings |
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| 103 | * |
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| 104 | * @since 2.5 |
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| 105 | * |
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| 106 | * @param array $field_options [description] |
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| 107 | * @param [type] $template_id [description] |
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| 108 | * @param [type] $field_id [description] |
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| 109 | * @param [type] $context [description] |
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| 110 | * @param [type] $input_type [description] |
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| 111 | * |
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| 112 | * @return array [description] |
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| 113 | */ |
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| 114 | public function duplicate_link_field_options( $field_options, $template_id, $field_id, $context, $input_type ) { |
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| 142 | |||
| 143 | |||
| 144 | /** |
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| 145 | * Add Edit Link as a default field, outside those set in the Gravity Form form |
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| 146 | * |
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| 147 | * @since 2.5 |
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| 148 | * |
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| 149 | * @param array $entry_default_fields Existing fields |
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| 150 | * @param string|array $form form_ID or form object |
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| 151 | * @param string $zone Either 'single', 'directory', 'edit', 'header', 'footer' |
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| 152 | * |
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| 153 | * @return array $entry_default_fields, with `duplicate_link` added. Won't be added if in Edit Entry context. |
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| 154 | */ |
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| 155 | public function add_default_field( $entry_default_fields, $form = array(), $zone = '' ) { |
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| 167 | |||
| 168 | /** |
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| 169 | * Add Duplicate Entry Link to the Add Field dialog |
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| 170 | * |
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| 171 | * @since 2.5 |
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| 172 | * |
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| 173 | * @param array $available_fields |
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| 174 | * |
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| 175 | * @return array Fields with `duplicate_link` added |
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| 176 | */ |
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| 177 | public function add_available_field( $available_fields = array() ) { |
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| 189 | |||
| 190 | /** |
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| 191 | * Change wording for the Edit context to read Entry Creator |
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| 192 | * |
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| 193 | * @since 2.5 |
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| 194 | * |
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| 195 | * @param array $visibility_caps Array of capabilities to display in field dropdown. |
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| 196 | * @param string $field_type Type of field options to render (`field` or `widget`) |
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| 197 | * @param string $template_id Table slug |
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| 198 | * @param float|string $field_id GF Field ID - Example: `3`, `5.2`, `entry_link`, `created_by` |
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| 199 | * @param string $context What context are we in? Example: `single` or `directory` |
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| 200 | * @param string $input_type (textarea, list, select, etc.) |
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| 201 | * |
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| 202 | * @return array Array of field options with `label`, `value`, `type`, `default` keys |
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| 203 | */ |
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| 204 | public function modify_visibility_caps( $visibility_caps = array(), $template_id = '', $field_id = '', $context = '', $input_type = '' ) { |
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| 219 | |||
| 220 | /** |
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| 221 | * Make sure there's an entry |
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| 222 | * |
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| 223 | * @since 2.5 |
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| 224 | * |
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| 225 | * @param array $entry Current entry array |
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| 226 | * |
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| 227 | * @return void |
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| 228 | */ |
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| 229 | public function set_entry( $entry ) { |
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| 232 | |||
| 233 | /** |
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| 234 | * Generate a consistent nonce key based on the Entry ID |
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| 235 | * |
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| 236 | * @since 2.5 |
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| 237 | * |
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| 238 | * @param int $entry_id Entry ID |
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| 239 | * |
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| 240 | * @return string Key used to validate request |
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| 241 | */ |
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| 242 | 2 | public static function get_nonce_key( $entry_id ) { |
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| 243 | 2 | return sprintf( 'duplicate_%s', $entry_id ); |
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| 244 | } |
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| 245 | |||
| 246 | |||
| 247 | /** |
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| 248 | * Generate a nonce link with the base URL of the current View embed |
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| 249 | * |
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| 250 | * We don't want to link to the single entry, because when duplicated, there would be nothing to return to. |
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| 251 | * |
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| 252 | * @since 2.5 |
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| 253 | * |
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| 254 | * @param array $entry Gravity Forms entry array |
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| 255 | * @param int $view_id The View id. Not optional since 2.0 |
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| 256 | * @param int $post_id ID of the current post/page being embedded on, if any |
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| 257 | * |
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| 258 | * @return string|null If directory link is valid, the URL to process the duplicate request. Otherwise, `NULL`. |
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| 259 | */ |
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| 260 | 2 | public static function get_duplicate_link( $entry, $view_id, $post_id = null ) { |
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| 279 | |||
| 280 | /** |
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| 281 | * Handle the duplication request, if $_GET['action'] is set to "duplicate" |
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| 282 | * |
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| 283 | * 1. Check referrer validity |
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| 284 | * 2. Make sure there's an entry with the slug of $_GET['entry_id'] |
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| 285 | * 3. If so, attempt to duplicate the entry. If not, set the error status |
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| 286 | * 4. Remove `action=duplicate` from the URL |
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| 287 | * 5. Redirect to the page using `wp_safe_redirect()` |
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| 288 | * |
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| 289 | * @since 2.5 |
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| 290 | * |
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| 291 | * @uses wp_safe_redirect() |
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| 292 | * |
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| 293 | * @return void|string $url URL during tests instead of redirect. |
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| 294 | */ |
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| 295 | 2 | public function process_duplicate() { |
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| 376 | |||
| 377 | /** |
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| 378 | * Duplicate the entry. |
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| 379 | * |
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| 380 | * Done after all the checks in self::process_duplicate. |
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| 381 | * |
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| 382 | * @since 2.5 |
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| 383 | * |
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| 384 | * @param array $entry The entry to be duplicated |
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| 385 | * |
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| 386 | * @return WP_Error|boolean |
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| 387 | */ |
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| 388 | 1 | private function duplicate_entry( $entry ) { |
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| 484 | |||
| 485 | /** |
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| 486 | * Is the current nonce valid for editing the entry? |
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| 487 | * |
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| 488 | * @since 2.5 |
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| 489 | * |
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| 490 | * @return boolean |
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| 491 | */ |
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| 492 | 1 | public function verify_nonce() { |
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| 514 | |||
| 515 | /** |
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| 516 | * Get the onclick attribute for the confirm dialogs that warns users before they duplicate an entry |
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| 517 | * |
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| 518 | * @since 2.5 |
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| 519 | * |
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| 520 | * @return string HTML `onclick` attribute |
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| 521 | */ |
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| 522 | 1 | public static function get_confirm_dialog() { |
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| 539 | |||
| 540 | /** |
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| 541 | * Check if the user can edit the entry |
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| 542 | * |
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| 543 | * - Is the nonce valid? |
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| 544 | * - Does the user have the right caps for the entry |
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| 545 | * - Is the entry in the trash? |
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| 546 | * |
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| 547 | * @since 2.5 |
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| 548 | * |
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| 549 | * @param array $entry Gravity Forms entry array |
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| 550 | * @param int $view_id ID of the View being rendered |
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| 551 | * |
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| 552 | * @return boolean|WP_Error True: can edit form. WP_Error: nope. |
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| 553 | */ |
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| 554 | 1 | private function user_can_duplicate_entry( $entry = array(), $view_id = null ) { |
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| 575 | |||
| 576 | |||
| 577 | /** |
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| 578 | * checks if user has permissions to view the link or duplicate a specific entry |
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| 579 | * |
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| 580 | * @since 2.5 |
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| 581 | * |
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| 582 | * @param array $entry Gravity Forms entry array |
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| 583 | * @param array $field Field settings (optional) |
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| 584 | * @param int $view_id Pass a View ID to check caps against. If not set, check against current View |
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| 585 | * |
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| 586 | * @return bool |
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| 587 | */ |
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| 588 | 2 | public static function check_user_cap_duplicate_entry( $entry, $field = array(), $view_id = 0 ) { |
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| 663 | |||
| 664 | |||
| 665 | /** |
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| 666 | * After processing duplicate entry, the user will be redirected to the referring View or embedded post/page. Display a message on redirection. |
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| 667 | * |
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| 668 | * If success, there will be `status` URL parameters `status=>success` |
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| 669 | * If an error, there will be `status` and `message` URL parameters `status=>error&message=example` |
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| 670 | * |
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| 671 | * @since 2.5 |
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| 672 | * |
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| 673 | * @param int $current_view_id The ID of the View being rendered |
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| 674 | * |
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| 675 | * @return void |
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| 676 | */ |
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| 677 | 36 | public function display_message( $current_view_id = 0 ) { |
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| 716 | |||
| 717 | |||
| 718 | } // end class |
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| 719 | |||
| 722 |
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Adding explicit visibility (
private,protected, orpublic) is generally recommend to communicate to other developers how, and from where this method is intended to be used.