silverstripe /
silverstripe-elemental
| Total Complexity | 52 |
| Total Lines | 296 |
| Duplicated Lines | 0 % |
| Changes | 15 | ||
| Bugs | 2 | Features | 0 |
Complex classes like ElementalAreasExtension 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 ElementalAreasExtension, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 47 | class ElementalAreasExtension extends DataExtension |
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| 48 | { |
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| 49 | use Extensible; |
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| 50 | |||
| 51 | /** |
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| 52 | * Classes to ignore adding elements to |
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| 53 | * @config |
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| 54 | * @var array $ignored_classes |
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| 55 | */ |
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| 56 | private static $ignored_classes = []; |
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| 57 | |||
| 58 | /** |
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| 59 | * On saving the element area, should Elemental reset the main website |
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| 60 | * `$Content` field. |
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| 61 | * |
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| 62 | * @config |
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| 63 | * @var boolean |
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| 64 | */ |
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| 65 | private static $clear_contentfield = false; |
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| 66 | |||
| 67 | /** |
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| 68 | * Whether to sort the elements alphabetically by their title |
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| 69 | * |
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| 70 | * @config |
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| 71 | * @var boolean |
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| 72 | */ |
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| 73 | private static $sort_types_alphabetically = true; |
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| 74 | |||
| 75 | /** |
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| 76 | * Whether or not to replace the default SiteTree content field |
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| 77 | * Applies globally, across all page types; unless a page type overrides this with its own config setting of |
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| 78 | * `elemental_keep_content_field` |
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| 79 | * |
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| 80 | * @var boolean |
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| 81 | * @config |
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| 82 | */ |
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| 83 | private static $keep_content_fields = false; |
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| 84 | |||
| 85 | /** |
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| 86 | * Get the available element types for this page type, |
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| 87 | * |
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| 88 | * Uses allowed_elements, stop_element_inheritance, disallowed_elements in |
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| 89 | * order to get to correct list. |
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| 90 | * |
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| 91 | * @return array |
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| 92 | */ |
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| 93 | public function getElementalTypes() |
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| 94 | { |
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| 95 | $config = $this->owner->config(); |
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| 96 | |||
| 97 | if (is_array($config->get('allowed_elements'))) { |
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| 98 | if ($config->get('stop_element_inheritance')) { |
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| 99 | $availableClasses = $config->get('allowed_elements', Config::UNINHERITED); |
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| 100 | } else { |
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| 101 | $availableClasses = $config->get('allowed_elements'); |
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| 102 | } |
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| 103 | } else { |
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| 104 | $availableClasses = ClassInfo::subclassesFor(BaseElement::class); |
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| 105 | } |
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| 106 | |||
| 107 | if ($config->get('stop_element_inheritance')) { |
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| 108 | $disallowedElements = (array) $config->get('disallowed_elements', Config::UNINHERITED); |
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| 109 | } else { |
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| 110 | $disallowedElements = (array) $config->get('disallowed_elements'); |
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| 111 | } |
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| 112 | $list = []; |
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| 113 | |||
| 114 | foreach ($availableClasses as $availableClass) { |
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| 115 | /** @var BaseElement $inst */ |
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| 116 | $inst = singleton($availableClass); |
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| 117 | |||
| 118 | if (!in_array($availableClass, $disallowedElements ?? []) && $inst->canCreate()) { |
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| 119 | if ($inst->hasMethod('canCreateElement') && !$inst->canCreateElement()) { |
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| 120 | continue; |
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| 121 | } |
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| 122 | |||
| 123 | $list[$availableClass] = $inst->getType(); |
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| 124 | } |
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| 125 | } |
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| 126 | |||
| 127 | if ($config->get('sort_types_alphabetically') !== false) { |
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| 128 | asort($list); |
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| 129 | } |
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| 130 | |||
| 131 | if (isset($list[BaseElement::class])) { |
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| 132 | unset($list[BaseElement::class]); |
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| 133 | } |
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| 134 | |||
| 135 | $class = get_class($this->owner); |
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| 136 | $this->owner->invokeWithExtensions('updateAvailableTypesForClass', $class, $list); |
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| 137 | |||
| 138 | return $list; |
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| 139 | } |
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| 140 | |||
| 141 | /** |
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| 142 | * Returns an array of the relation names to ElementAreas. Ignores any |
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| 143 | * has_one fields named `Parent` as that would indicate that this is child |
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| 144 | * of an existing area |
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| 145 | * |
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| 146 | * @return array |
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| 147 | */ |
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| 148 | public function getElementalRelations() |
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| 149 | { |
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| 150 | $hasOnes = $this->owner->hasOne(); |
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| 151 | |||
| 152 | if (!$hasOnes) { |
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| 153 | return false; |
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| 154 | } |
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| 155 | |||
| 156 | $elementalAreaRelations = []; |
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| 157 | |||
| 158 | foreach ($hasOnes as $hasOneName => $hasOneClass) { |
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| 159 | if ($hasOneName === 'Parent' || $hasOneName === 'ParentID') { |
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| 160 | continue; |
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| 161 | } |
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| 162 | |||
| 163 | if ($hasOneClass == ElementalArea::class || is_subclass_of($hasOneClass, ElementalArea::class)) { |
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| 164 | $elementalAreaRelations[] = $hasOneName; |
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| 165 | } |
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| 166 | } |
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| 167 | |||
| 168 | return $elementalAreaRelations; |
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| 169 | } |
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| 170 | |||
| 171 | /** |
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| 172 | * Setup the CMS Fields |
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| 173 | * |
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| 174 | * @param FieldList |
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| 175 | */ |
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| 176 | public function updateCMSFields(FieldList $fields) |
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| 177 | { |
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| 178 | if (!$this->supportsElemental()) { |
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| 179 | return; |
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| 180 | } |
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| 181 | |||
| 182 | // add an empty holder for content as some module explicitly use insert after content |
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| 183 | $globalReplace = !Config::inst()->get(self::class, 'keep_content_fields'); |
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| 184 | $classOverride = Config::inst()->get(get_class($this->owner), 'elemental_keep_content_field'); |
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| 185 | if ($globalReplace && !$classOverride || $classOverride === false) { |
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| 186 | $fields->replaceField('Content', new LiteralField('Content', '')); |
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| 187 | } |
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| 188 | $elementalAreaRelations = $this->owner->getElementalRelations(); |
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| 189 | |||
| 190 | foreach ($elementalAreaRelations as $eaRelationship) { |
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| 191 | $key = $eaRelationship . 'ID'; |
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| 192 | |||
| 193 | // remove the scaffold dropdown |
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| 194 | $fields->removeByName($key); |
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| 195 | |||
| 196 | // remove the field, but don't add anything. |
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| 197 | if (!$this->owner->isInDb()) { |
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| 198 | continue; |
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| 199 | } |
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| 200 | |||
| 201 | // Example: $eaRelationship = 'ElementalArea'; |
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| 202 | $area = $this->owner->$eaRelationship(); |
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| 203 | |||
| 204 | $editor = ElementalAreaField::create($eaRelationship, $area, $this->getElementalTypes()); |
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| 205 | |||
| 206 | if ($this->owner instanceof SiteTree && $fields->findOrMakeTab('Root.Main')->fieldByName('Metadata')) { |
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| 207 | $fields->addFieldToTab('Root.Main', $editor, 'Metadata'); |
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| 208 | } else { |
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| 209 | $fields->addFieldToTab('Root.Main', $editor); |
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| 210 | } |
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| 211 | } |
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| 212 | |||
| 213 | return $fields; |
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| 214 | } |
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| 215 | |||
| 216 | /** |
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| 217 | * Make sure there is always an ElementalArea for adding Elements |
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| 218 | */ |
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| 219 | public function onBeforeWrite() |
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| 244 | } |
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| 245 | } |
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| 246 | |||
| 247 | /** |
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| 248 | * @return boolean |
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| 249 | */ |
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| 250 | public function supportsElemental() |
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| 251 | { |
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| 252 | if ($this->owner->hasMethod('includeElemental')) { |
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| 253 | $res = $this->owner->includeElemental(); |
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| 254 | |||
| 255 | if ($res !== null) { |
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| 256 | return $res; |
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| 257 | } |
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| 258 | } |
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| 259 | |||
| 260 | if (is_a($this->owner, RedirectorPage::class) || is_a($this->owner, VirtualPage::class)) { |
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| 261 | return false; |
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| 262 | } elseif ($ignored = Config::inst()->get(ElementalPageExtension::class, 'ignored_classes')) { |
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| 263 | foreach ($ignored as $check) { |
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| 264 | if (is_a($this->owner, $check ?? '')) { |
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| 265 | return false; |
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| 266 | } |
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| 267 | } |
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| 268 | } |
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| 269 | |||
| 270 | return true; |
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| 271 | } |
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| 272 | |||
| 273 | /** |
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| 274 | * Set all has_one relationships to an ElementalArea to a valid ID if they're unset |
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| 275 | * |
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| 276 | * @param array $elementalAreaRelations indexed array of relationship names that are to ElementalAreas |
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| 277 | * @return DataObject |
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| 278 | */ |
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| 279 | public function ensureElementalAreasExist($elementalAreaRelations) |
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| 280 | { |
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| 281 | foreach ($elementalAreaRelations as $eaRelationship) { |
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| 282 | $areaID = $eaRelationship . 'ID'; |
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| 283 | |||
| 284 | if (!$this->owner->$areaID) { |
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| 285 | $area = ElementalArea::create(); |
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| 286 | $area->OwnerClassName = get_class($this->owner); |
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| 287 | $area->write(); |
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| 288 | $this->owner->$areaID = $area->ID; |
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| 289 | } |
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| 290 | } |
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| 291 | return $this->owner; |
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| 292 | } |
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| 293 | |||
| 294 | /** |
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| 295 | * Extension hook {@see DataObject::requireDefaultRecords} |
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| 296 | * |
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| 297 | * @return void |
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| 298 | */ |
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| 299 | public function requireDefaultRecords() |
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| 343 | } |
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| 344 | } |
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| 345 |
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