htmlburger /
carbon-fields
Complex classes like Fulfillable_Collection 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 Fulfillable_Collection, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 10 | class Fulfillable_Collection implements Fulfillable { |
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| 11 | |||
| 12 | /** |
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| 13 | * Condition factory used to translated condition types |
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| 14 | * |
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| 15 | * @var Factory |
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| 16 | */ |
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| 17 | protected $condition_factory; |
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| 18 | |||
| 19 | /** |
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| 20 | * Array translator used to support array representations of fulfillables |
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| 21 | * |
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| 22 | * @var Array_Translator |
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| 23 | */ |
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| 24 | protected $array_translator; |
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| 25 | |||
| 26 | /** |
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| 27 | * Array of fulfillables in this collection |
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| 28 | * |
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| 29 | * @var array<array> |
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| 30 | */ |
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| 31 | protected $fulfillables = array(); |
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| 32 | |||
| 33 | /** |
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| 34 | * Array of supported fulfillable comparisons |
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| 35 | * |
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| 36 | * @var array<string> |
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| 37 | */ |
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| 38 | protected $supported_fulfillable_comparisons = array( 'AND', 'OR' ); |
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| 39 | |||
| 40 | /** |
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| 41 | * Array of allowed condition types which propagate to child collections |
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| 42 | * |
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| 43 | * @var array<string> |
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| 44 | */ |
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| 45 | protected $condition_type_list = array(); |
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| 46 | |||
| 47 | /** |
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| 48 | * Whether the condition type list is a whitelist or a blacklist |
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| 49 | * |
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| 50 | * @var bool |
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| 51 | */ |
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| 52 | protected $condition_type_list_whitelist = false; |
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| 53 | |||
| 54 | /** |
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| 55 | * Constructor |
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| 56 | * |
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| 57 | * @param Factory $condition_factory |
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| 58 | * @param Array_Translator $array_translator |
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| 59 | */ |
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| 60 | public function __construct( Factory $condition_factory, Array_Translator $array_translator ) { |
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| 64 | |||
| 65 | /** |
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| 66 | * Get an array of the fulfillables in this collection |
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| 67 | * |
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| 68 | * @return array<Fulfillable> |
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| 69 | */ |
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| 70 | public function get_fulfillables() { |
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| 73 | |||
| 74 | /** |
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| 75 | * Get array of allowed condition types |
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| 76 | * |
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| 77 | * @return array<string> |
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| 78 | */ |
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| 79 | public function get_condition_type_list() { |
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| 82 | |||
| 83 | /** |
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| 84 | * Set array of allowed condition types |
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| 85 | * WARNING: this will NOT remove already added conditions which are no longer allowed |
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| 86 | * |
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| 87 | * @param array<string> $condition_type_list |
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| 88 | * @param bool $whitelist |
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| 89 | * @return Fulfillable_Collection $this |
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| 90 | */ |
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| 91 | public function set_condition_type_list( $condition_type_list, $whitelist ) { |
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| 97 | |||
| 98 | /** |
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| 99 | * Check if conditions types list is a whitelist |
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| 100 | * |
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| 101 | * @return bool |
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| 102 | */ |
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| 103 | public function is_condition_type_list_whitelist() { |
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| 106 | |||
| 107 | /** |
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| 108 | * Check if condition type is allowed |
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| 109 | * |
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| 110 | * @param string $condition_type |
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| 111 | * @return bool |
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| 112 | */ |
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| 113 | public function is_condition_type_allowed( $condition_type ) { |
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| 120 | |||
| 121 | /** |
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| 122 | * Propagate allowed condition types to child collections |
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| 123 | */ |
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| 124 | protected function propagate_condition_type_list() { |
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| 133 | |||
| 134 | /** |
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| 135 | * Shorthand for when with AND comparison |
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| 136 | * |
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| 137 | * @param string|array|callable $condition_type |
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| 138 | * @param string $comparison_operator Can be skipped. Defaults to "=" |
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| 139 | * @param mixed $value |
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| 140 | * @return Fulfillable_Collection $this |
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| 141 | */ |
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| 142 | public function and_when( $condition_type, $comparison_operator = '=', $value = null ) { |
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| 146 | |||
| 147 | /** |
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| 148 | * Shorthand for when with OR comparison |
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| 149 | * |
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| 150 | * @param string|array|callable $condition_type |
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| 151 | * @param string $comparison_operator Can be skipped. Defaults to "=" |
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| 152 | * @param mixed $value |
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| 153 | * @return Fulfillable_Collection $this |
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| 154 | */ |
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| 155 | public function or_when( $condition_type, $comparison_operator = '=', $value = null ) { |
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| 159 | |||
| 160 | /** |
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| 161 | * Add fulfillable with optional comparison_operator |
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| 162 | * This method assumes there is no fulfillable that can be compared with literal NULL |
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| 163 | * |
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| 164 | * @param string|array|callable $condition_type |
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| 165 | * @param string $comparison_operator Can be skipped. Defaults to "=" |
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| 166 | * @param mixed $value |
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| 167 | * @param string $fulfillable_comparison |
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| 168 | * @return Fulfillable_Collection $this |
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| 169 | */ |
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| 170 | public function when( $condition_type, $comparison_operator = '=', $value = null, $fulfillable_comparison = 'AND' ) { |
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| 195 | |||
| 196 | /** |
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| 197 | * Add a Fulfillable through array representation |
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| 198 | * |
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| 199 | * @param array $fulfillable_as_array |
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| 200 | * @param string $fulfillable_comparison |
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| 201 | * @return Fulfillable_Collection $this |
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| 202 | */ |
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| 203 | protected function when_array( $fulfillable_as_array, $fulfillable_comparison) { |
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| 208 | |||
| 209 | /** |
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| 210 | * Add a Fulfillable_Collection for nested logic |
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| 211 | * |
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| 212 | * @param callable $collection_callable |
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| 213 | * @param string $fulfillable_comparison |
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| 214 | * @return Fulfillable_Collection $this |
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| 215 | */ |
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| 216 | protected function when_collection( $collection_callable, $fulfillable_comparison) { |
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| 223 | |||
| 224 | /** |
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| 225 | * Add fulfillable to collection |
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| 226 | * |
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| 227 | * @param Fulfillable $fulfillable |
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| 228 | * @param string $fulfillable_comparison See static::$supported_fulfillable_comparisons |
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| 229 | */ |
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| 230 | public function add_fulfillable( Fulfillable $fulfillable, $fulfillable_comparison ) { |
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| 240 | |||
| 241 | /** |
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| 242 | * Remove fulfillable from collection |
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| 243 | * |
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| 244 | * @param Fulfillable $fulfillable |
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| 245 | * @return bool Fulfillable found and removed |
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| 246 | */ |
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| 247 | public function remove_fulfillable( Fulfillable $fulfillable ) { |
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| 259 | |||
| 260 | /** |
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| 261 | * Get a copy of the collection with conditions not in the whitelist filtered out |
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| 262 | * |
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| 263 | * @param array<string> $condition_whitelist |
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| 264 | * @return Fulfillable_Collection |
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| 265 | */ |
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| 266 | public function filter( $condition_whitelist ) { |
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| 293 | |||
| 294 | /** |
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| 295 | * Get a copy of the collection with passed conditions evaluated into boolean conditions |
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| 296 | * Useful when evaluating only certain condition types but preserving the rest |
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| 297 | * or when passing dynamic conditions to the front-end |
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| 298 | * |
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| 299 | * @param array<string> $condition_types |
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| 300 | * @param array|boolean $environment Environment array or a boolean value to force on conditions |
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| 301 | * @return Fulfillable_Collection |
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| 302 | */ |
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| 303 | public function evaluate( $condition_types, $environment ) { |
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| 330 | |||
| 331 | /** |
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| 332 | * Check if all fulfillables are fulfilled taking into account their fulfillable comparison |
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| 333 | * |
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| 334 | * @param array $environment |
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| 335 | * @return bool |
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| 336 | */ |
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| 337 | public function is_fulfilled( $environment ) { |
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| 366 | } |
