Complex classes like SonataAdminExtension 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 SonataAdminExtension, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 42 | final class SonataAdminExtension extends AbstractExtension |
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| 43 | { |
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| 44 | // @todo: there are more locales which are not supported by moment and they need to be translated/normalized/canonicalized here |
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| 45 | public const MOMENT_UNSUPPORTED_LOCALES = [ |
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| 46 | 'de' => ['de', 'de-at'], |
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| 47 | 'es' => ['es', 'es-do'], |
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| 48 | 'nl' => ['nl', 'nl-be'], |
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| 49 | 'fr' => ['fr', 'fr-ca', 'fr-ch'], |
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| 50 | ]; |
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| 51 | |||
| 52 | /** |
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| 53 | * @var TranslatorInterface|null |
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| 54 | */ |
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| 55 | protected $translator; |
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| 56 | /** |
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| 57 | * @var Pool |
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| 58 | */ |
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| 59 | private $pool; |
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| 60 | |||
| 61 | /** |
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| 62 | * @var LoggerInterface |
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| 63 | */ |
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| 64 | private $logger; |
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| 65 | |||
| 66 | /** |
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| 67 | * @var string[] |
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| 68 | */ |
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| 69 | private $xEditableTypeMapping = []; |
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| 70 | |||
| 71 | /** |
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| 72 | * @var ContainerInterface |
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| 73 | */ |
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| 74 | private $templateRegistries; |
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| 75 | |||
| 76 | /** |
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| 77 | * @var AuthorizationCheckerInterface |
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| 78 | */ |
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| 79 | private $securityChecker; |
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| 80 | |||
| 81 | public function __construct( |
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| 82 | Pool $pool, |
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| 83 | ?LoggerInterface $logger = null, |
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| 84 | TranslatorInterface $translator, |
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| 85 | ?ContainerInterface $templateRegistries = null, |
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| 86 | ?AuthorizationCheckerInterface $securityChecker = null |
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| 87 | ) { |
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| 88 | $this->pool = $pool; |
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| 89 | $this->logger = $logger; |
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| 90 | $this->translator = $translator; |
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| 91 | $this->templateRegistries = $templateRegistries; |
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| 92 | $this->securityChecker = $securityChecker; |
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| 93 | } |
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| 94 | |||
| 95 | public function getFilters() |
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| 96 | { |
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| 97 | return [ |
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| 98 | new TwigFilter( |
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| 99 | 'render_list_element', |
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| 100 | [$this, 'renderListElement'], |
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| 101 | [ |
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| 102 | 'is_safe' => ['html'], |
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| 103 | 'needs_environment' => true, |
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| 104 | ] |
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| 105 | ), |
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| 106 | new TwigFilter( |
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| 107 | 'render_view_element', |
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| 108 | [$this, 'renderViewElement'], |
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| 109 | [ |
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| 110 | 'is_safe' => ['html'], |
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| 111 | 'needs_environment' => true, |
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| 112 | ] |
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| 113 | ), |
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| 114 | new TwigFilter( |
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| 115 | 'render_view_element_compare', |
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| 116 | [$this, 'renderViewElementCompare'], |
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| 117 | [ |
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| 118 | 'is_safe' => ['html'], |
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| 119 | 'needs_environment' => true, |
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| 120 | ] |
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| 121 | ), |
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| 122 | new TwigFilter( |
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| 123 | 'render_relation_element', |
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| 124 | [$this, 'renderRelationElement'] |
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| 125 | ), |
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| 126 | new TwigFilter( |
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| 127 | 'sonata_urlsafeid', |
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| 128 | [$this, 'getUrlSafeIdentifier'] |
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| 129 | ), |
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| 130 | new TwigFilter( |
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| 131 | 'sonata_xeditable_type', |
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| 132 | [$this, 'getXEditableType'] |
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| 133 | ), |
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| 134 | new TwigFilter( |
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| 135 | 'sonata_xeditable_choices', |
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| 136 | [$this, 'getXEditableChoices'] |
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| 137 | ), |
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| 138 | ]; |
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| 139 | } |
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| 140 | |||
| 141 | public function getFunctions() |
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| 142 | { |
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| 143 | return [ |
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| 144 | new TwigFunction('canonicalize_locale_for_moment', [$this, 'getCanonicalizedLocaleForMoment'], ['needs_context' => true]), |
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| 145 | new TwigFunction('canonicalize_locale_for_select2', [$this, 'getCanonicalizedLocaleForSelect2'], ['needs_context' => true]), |
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| 146 | new TwigFunction('is_granted_affirmative', [$this, 'isGrantedAffirmative']), |
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| 147 | ]; |
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| 148 | } |
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| 149 | |||
| 150 | public function getName() |
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| 151 | { |
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| 152 | return 'sonata_admin'; |
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| 153 | } |
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| 154 | |||
| 155 | /** |
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| 156 | * render a list element from the FieldDescription. |
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| 157 | * |
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| 158 | * @param object|array $listElement |
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| 159 | * @param array $params |
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| 160 | * |
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| 161 | * @return string |
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| 162 | */ |
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| 163 | public function renderListElement( |
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| 164 | Environment $environment, |
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| 165 | $listElement, |
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| 166 | FieldDescriptionInterface $fieldDescription, |
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| 167 | $params = [] |
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| 168 | ) { |
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| 169 | $template = $this->getTemplate( |
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| 170 | $fieldDescription, |
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| 171 | $this->getTemplateRegistry($fieldDescription->getAdmin()->getCode())->getTemplate('base_list_field'), |
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| 172 | $environment |
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| 173 | ); |
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| 174 | |||
| 175 | [$object, $value] = $this->getObjectAndValueFromListElement($listElement, $fieldDescription); |
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| 176 | |||
| 177 | return $this->render($fieldDescription, $template, array_merge($params, [ |
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| 178 | 'admin' => $fieldDescription->getAdmin(), |
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| 179 | 'object' => $object, |
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| 180 | 'value' => $value, |
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| 181 | 'field_description' => $fieldDescription, |
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| 182 | ]), $environment); |
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| 183 | } |
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| 184 | |||
| 185 | /** |
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| 186 | * render a view element. |
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| 187 | * |
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| 188 | * @param object $object |
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| 189 | * |
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| 190 | * @return string |
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| 191 | */ |
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| 192 | public function renderViewElement( |
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| 193 | Environment $environment, |
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| 194 | FieldDescriptionInterface $fieldDescription, |
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| 195 | $object |
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| 196 | ) { |
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| 197 | $template = $this->getTemplate( |
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| 198 | $fieldDescription, |
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| 199 | '@SonataAdmin/CRUD/base_show_field.html.twig', |
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| 200 | $environment |
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| 201 | ); |
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| 202 | |||
| 203 | try { |
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| 204 | $value = $fieldDescription->getValue($object); |
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| 205 | } catch (NoValueException $e) { |
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| 206 | // NEXT_MAJOR: Remove the try catch in order to throw the NoValueException. |
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| 207 | @trigger_error( |
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| 208 | 'Accessing a non existing value is deprecated' |
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| 209 | .' since sonata-project/admin-bundle 3.67 and will throw an exception in 4.0.', |
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| 210 | E_USER_DEPRECATED |
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| 211 | ); |
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| 212 | |||
| 213 | $value = null; |
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| 214 | } |
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| 215 | |||
| 216 | return $this->render($fieldDescription, $template, [ |
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| 217 | 'field_description' => $fieldDescription, |
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| 218 | 'object' => $object, |
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| 219 | 'value' => $value, |
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| 220 | 'admin' => $fieldDescription->getAdmin(), |
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| 221 | ], $environment); |
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| 222 | } |
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| 223 | |||
| 224 | /** |
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| 225 | * render a compared view element. |
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| 226 | * |
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| 227 | * @param mixed $baseObject |
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| 228 | * @param mixed $compareObject |
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| 229 | * |
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| 230 | * @return string |
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| 231 | */ |
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| 232 | public function renderViewElementCompare( |
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| 233 | Environment $environment, |
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| 234 | FieldDescriptionInterface $fieldDescription, |
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| 235 | $baseObject, |
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| 236 | $compareObject |
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| 237 | ) { |
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| 238 | $template = $this->getTemplate( |
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| 239 | $fieldDescription, |
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| 240 | '@SonataAdmin/CRUD/base_show_field.html.twig', |
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| 241 | $environment |
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| 242 | ); |
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| 243 | |||
| 244 | try { |
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| 245 | $baseValue = $fieldDescription->getValue($baseObject); |
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| 246 | } catch (NoValueException $e) { |
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| 247 | // NEXT_MAJOR: Remove the try catch in order to throw the NoValueException. |
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| 248 | @trigger_error( |
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| 249 | 'Accessing a non existing value is deprecated' |
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| 250 | .' since sonata-project/admin-bundle 3.67 and will throw an exception in 4.0.', |
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| 251 | E_USER_DEPRECATED |
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| 252 | ); |
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| 253 | |||
| 254 | $baseValue = null; |
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| 255 | } |
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| 256 | |||
| 257 | try { |
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| 258 | $compareValue = $fieldDescription->getValue($compareObject); |
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| 259 | } catch (NoValueException $e) { |
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| 260 | // NEXT_MAJOR: Remove the try catch in order to throw the NoValueException. |
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| 261 | @trigger_error( |
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| 262 | 'Accessing a non existing value is deprecated' |
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| 263 | .' since sonata-project/admin-bundle 3.67 and will throw an exception in 4.0.', |
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| 264 | E_USER_DEPRECATED |
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| 265 | ); |
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| 266 | |||
| 267 | $compareValue = null; |
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| 268 | } |
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| 269 | |||
| 270 | $baseValueOutput = $template->render([ |
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| 271 | 'admin' => $fieldDescription->getAdmin(), |
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| 272 | 'field_description' => $fieldDescription, |
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| 273 | 'value' => $baseValue, |
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| 274 | 'object' => $baseObject, |
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| 275 | ]); |
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| 276 | |||
| 277 | $compareValueOutput = $template->render([ |
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| 278 | 'field_description' => $fieldDescription, |
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| 279 | 'admin' => $fieldDescription->getAdmin(), |
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| 280 | 'value' => $compareValue, |
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| 281 | 'object' => $compareObject, |
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| 282 | ]); |
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| 283 | |||
| 284 | // Compare the rendered output of both objects by using the (possibly) overridden field block |
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| 285 | $isDiff = $baseValueOutput !== $compareValueOutput; |
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| 286 | |||
| 287 | return $this->render($fieldDescription, $template, [ |
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| 288 | 'field_description' => $fieldDescription, |
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| 289 | 'value' => $baseValue, |
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| 290 | 'value_compare' => $compareValue, |
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| 291 | 'is_diff' => $isDiff, |
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| 292 | 'admin' => $fieldDescription->getAdmin(), |
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| 293 | 'object' => $baseObject, |
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| 294 | ], $environment); |
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| 295 | } |
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| 296 | |||
| 297 | /** |
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| 298 | * @param mixed $element |
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| 299 | * |
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| 300 | * @throws \RuntimeException |
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| 301 | * |
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| 302 | * @return mixed |
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| 303 | */ |
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| 304 | public function renderRelationElement($element, FieldDescriptionInterface $fieldDescription) |
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| 305 | { |
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| 306 | if (!\is_object($element)) { |
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| 307 | return $element; |
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| 308 | } |
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| 309 | |||
| 310 | $propertyPath = $fieldDescription->getOption('associated_property'); |
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| 311 | |||
| 312 | if (null === $propertyPath) { |
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| 313 | // For BC kept associated_tostring option behavior |
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| 314 | $method = $fieldDescription->getOption('associated_tostring'); |
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| 315 | |||
| 316 | if ($method) { |
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| 317 | @trigger_error( |
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| 318 | 'Option "associated_tostring" is deprecated since version 2.3 and will be removed in 4.0. Use "associated_property" instead.', |
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| 319 | E_USER_DEPRECATED |
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| 320 | ); |
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| 321 | } else { |
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| 322 | $method = '__toString'; |
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| 323 | } |
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| 324 | |||
| 325 | if (!method_exists($element, $method)) { |
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| 326 | throw new \RuntimeException(sprintf( |
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| 327 | 'You must define an `associated_property` option or create a `%s::__toString` method' |
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| 328 | .' to the field option %s from service %s is ', |
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| 329 | \get_class($element), |
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| 330 | $fieldDescription->getName(), |
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| 331 | $fieldDescription->getAdmin()->getCode() |
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| 332 | )); |
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| 333 | } |
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| 334 | |||
| 335 | return $element->$method(); |
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| 336 | } |
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| 337 | |||
| 338 | if (\is_callable($propertyPath)) { |
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| 339 | return $propertyPath($element); |
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| 340 | } |
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| 341 | |||
| 342 | return $this->pool->getPropertyAccessor()->getValue($element, $propertyPath); |
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| 343 | } |
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| 344 | |||
| 345 | /** |
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| 346 | * Get the identifiers as a string that is safe to use in a url. |
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| 347 | * |
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| 348 | * @param object $model |
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| 349 | * |
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| 350 | * @return string string representation of the id that is safe to use in a url |
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| 351 | */ |
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| 352 | public function getUrlSafeIdentifier($model, ?AdminInterface $admin = null) |
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| 353 | { |
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| 354 | if (null === $admin) { |
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| 355 | $class = ClassUtils::getClass($model); |
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| 356 | if (!$this->pool->hasAdminByClass($class)) { |
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| 357 | throw new \InvalidArgumentException('You must pass an admin.'); |
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| 358 | } |
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| 359 | |||
| 360 | $admin = $this->pool->getAdminByClass($class); |
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| 361 | } |
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| 362 | |||
| 363 | return $admin->getUrlSafeIdentifier($model); |
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| 364 | } |
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| 365 | |||
| 366 | /** |
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| 367 | * @param string[] $xEditableTypeMapping |
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| 368 | */ |
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| 369 | public function setXEditableTypeMapping($xEditableTypeMapping): void |
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| 370 | { |
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| 371 | $this->xEditableTypeMapping = $xEditableTypeMapping; |
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| 372 | } |
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| 373 | |||
| 374 | /** |
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| 375 | * @return string|bool |
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| 376 | */ |
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| 377 | public function getXEditableType($type) |
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| 378 | { |
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| 379 | return isset($this->xEditableTypeMapping[$type]) ? $this->xEditableTypeMapping[$type] : false; |
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| 380 | } |
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| 381 | |||
| 382 | /** |
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| 383 | * Return xEditable choices based on the field description choices options & catalogue options. |
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| 384 | * With the following choice options: |
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| 385 | * ['Status1' => 'Alias1', 'Status2' => 'Alias2'] |
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| 386 | * The method will return: |
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| 387 | * [['value' => 'Status1', 'text' => 'Alias1'], ['value' => 'Status2', 'text' => 'Alias2']]. |
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| 388 | * |
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| 389 | * @return array |
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| 390 | */ |
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| 391 | public function getXEditableChoices(FieldDescriptionInterface $fieldDescription) |
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| 392 | { |
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| 393 | $choices = $fieldDescription->getOption('choices', []); |
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| 394 | $catalogue = $fieldDescription->getOption('catalogue'); |
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| 395 | $xEditableChoices = []; |
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| 396 | if (!empty($choices)) { |
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| 397 | reset($choices); |
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| 398 | $first = current($choices); |
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| 399 | // the choices are already in the right format |
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| 400 | if (\is_array($first) && \array_key_exists('value', $first) && \array_key_exists('text', $first)) { |
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| 401 | $xEditableChoices = $choices; |
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| 402 | } else { |
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| 403 | foreach ($choices as $value => $text) { |
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| 404 | if ($catalogue) { |
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| 405 | if (null !== $this->translator) { |
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| 406 | $text = $this->translator->trans($text, [], $catalogue); |
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| 407 | // NEXT_MAJOR: Remove this check |
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| 408 | } elseif (method_exists($fieldDescription->getAdmin(), 'trans')) { |
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| 409 | $text = $fieldDescription->getAdmin()->trans($text, [], $catalogue); |
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| 410 | } |
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| 411 | } |
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| 412 | |||
| 413 | $xEditableChoices[] = [ |
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| 414 | 'value' => $value, |
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| 415 | 'text' => $text, |
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| 416 | ]; |
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| 417 | } |
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| 418 | } |
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| 419 | } |
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| 420 | |||
| 421 | if (false === $fieldDescription->getOption('required', true) |
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| 422 | && false === $fieldDescription->getOption('multiple', false) |
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| 423 | ) { |
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| 424 | $xEditableChoices = array_merge([[ |
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| 425 | 'value' => '', |
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| 426 | 'text' => '', |
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| 427 | ]], $xEditableChoices); |
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| 428 | } |
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| 429 | |||
| 430 | return $xEditableChoices; |
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| 431 | } |
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| 432 | |||
| 433 | /* |
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| 434 | * Returns a canonicalized locale for "moment" NPM library, |
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| 435 | * or `null` if the locale's language is "en", which doesn't require localization. |
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| 436 | * |
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| 437 | * @return string|null |
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| 438 | */ |
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| 439 | public function getCanonicalizedLocaleForMoment(array $context) |
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| 440 | { |
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| 441 | $locale = strtolower(str_replace('_', '-', $context['app']->getRequest()->getLocale())); |
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| 442 | |||
| 443 | // "en" language doesn't require localization. |
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| 444 | if (('en' === $lang = substr($locale, 0, 2)) && !\in_array($locale, ['en-au', 'en-ca', 'en-gb', 'en-ie', 'en-nz'], true)) { |
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| 445 | return null; |
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| 446 | } |
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| 447 | |||
| 448 | foreach (self::MOMENT_UNSUPPORTED_LOCALES as $language => $locales) { |
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| 449 | if ($language === $lang && !\in_array($locale, $locales, true)) { |
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| 450 | $locale = $language; |
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| 451 | } |
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| 452 | } |
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| 453 | |||
| 454 | return $locale; |
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| 455 | } |
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| 456 | |||
| 457 | /** |
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| 458 | * Returns a canonicalized locale for "select2" NPM library, |
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| 459 | * or `null` if the locale's language is "en", which doesn't require localization. |
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| 460 | * |
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| 461 | * @return string|null |
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| 462 | */ |
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| 463 | public function getCanonicalizedLocaleForSelect2(array $context) |
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| 464 | { |
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| 465 | $locale = str_replace('_', '-', $context['app']->getRequest()->getLocale()); |
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| 466 | |||
| 467 | // "en" language doesn't require localization. |
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| 468 | if ('en' === $lang = substr($locale, 0, 2)) { |
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| 469 | return null; |
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| 470 | } |
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| 471 | |||
| 472 | switch ($locale) { |
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| 473 | case 'pt': |
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| 474 | $locale = 'pt-PT'; |
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| 475 | break; |
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| 476 | case 'ug': |
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| 477 | $locale = 'ug-CN'; |
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| 478 | break; |
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| 479 | case 'zh': |
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| 480 | $locale = 'zh-CN'; |
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| 481 | break; |
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| 482 | default: |
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| 483 | if (!\in_array($locale, ['pt-BR', 'pt-PT', 'ug-CN', 'zh-CN', 'zh-TW'], true)) { |
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| 484 | $locale = $lang; |
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| 485 | } |
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| 486 | } |
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| 487 | |||
| 488 | return $locale; |
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| 489 | } |
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| 490 | |||
| 491 | /** |
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| 492 | * @param string|array $role |
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| 493 | * @param object|null $object |
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| 494 | * @param string|null $field |
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| 495 | * |
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| 496 | * @return bool |
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| 497 | */ |
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| 498 | public function isGrantedAffirmative($role, $object = null, $field = null) |
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| 499 | { |
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| 500 | if (null === $this->securityChecker) { |
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| 501 | return false; |
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| 502 | } |
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| 503 | |||
| 504 | if (null !== $field) { |
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| 505 | $object = new FieldVote($object, $field); |
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| 506 | } |
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| 507 | |||
| 508 | if (!\is_array($role)) { |
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| 509 | $role = [$role]; |
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| 510 | } |
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| 511 | |||
| 512 | foreach ($role as $oneRole) { |
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| 513 | try { |
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| 514 | if ($this->securityChecker->isGranted($oneRole, $object)) { |
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| 515 | return true; |
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| 516 | } |
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| 517 | } catch (AuthenticationCredentialsNotFoundException $e) { |
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| 518 | // empty on purpose |
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| 519 | } |
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| 520 | } |
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| 521 | |||
| 522 | return false; |
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| 523 | } |
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| 524 | |||
| 525 | /** |
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| 526 | * return the value related to FieldDescription, if the associated object does no |
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| 527 | * exists => a temporary one is created. |
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| 528 | * |
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| 529 | * @param object $object |
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| 530 | * |
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| 531 | * @throws \RuntimeException |
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| 532 | * |
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| 533 | * @return mixed |
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| 534 | */ |
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| 535 | private function getValueFromFieldDescription( |
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| 536 | $object, |
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| 537 | FieldDescriptionInterface $fieldDescription, |
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| 538 | array $params = [] |
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| 539 | ) { |
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| 540 | if (isset($params['loop']) && $object instanceof \ArrayAccess) { |
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| 541 | throw new \RuntimeException('remove the loop requirement'); |
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| 542 | } |
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| 543 | |||
| 544 | $value = null; |
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| 545 | |||
| 546 | try { |
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| 547 | $value = $fieldDescription->getValue($object); |
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| 548 | } catch (NoValueException $e) { |
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| 549 | if ($fieldDescription->getAssociationAdmin()) { |
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| 550 | $value = $fieldDescription->getAssociationAdmin()->getNewInstance(); |
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| 551 | } |
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| 552 | } |
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| 553 | |||
| 554 | return $value; |
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| 555 | } |
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| 556 | |||
| 557 | /** |
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| 558 | * Get template. |
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| 559 | * |
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| 560 | * @param string $defaultTemplate |
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| 561 | * |
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| 562 | * @return TemplateWrapper |
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| 563 | */ |
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| 564 | private function getTemplate( |
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| 565 | FieldDescriptionInterface $fieldDescription, |
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| 566 | $defaultTemplate, |
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| 567 | Environment $environment |
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| 568 | ) { |
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| 569 | $templateName = $fieldDescription->getTemplate() ?: $defaultTemplate; |
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| 570 | |||
| 571 | try { |
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| 572 | $template = $environment->load($templateName); |
||
| 573 | } catch (LoaderError $e) { |
||
| 574 | @trigger_error(sprintf( |
||
| 575 | 'Relying on default template loading on field template loading exception is deprecated since 3.1' |
||
| 576 | .' and will be removed in 4.0. A %s exception will be thrown instead', |
||
| 577 | LoaderError::class |
||
| 578 | ), E_USER_DEPRECATED); |
||
| 579 | $template = $environment->load($defaultTemplate); |
||
| 580 | |||
| 581 | if (null !== $this->logger) { |
||
| 582 | $this->logger->warning(sprintf( |
||
| 583 | 'An error occured trying to load the template "%s" for the field "%s",' |
||
| 584 | .' the default template "%s" was used instead.', |
||
| 585 | $templateName, |
||
| 586 | $fieldDescription->getFieldName(), |
||
| 587 | $defaultTemplate |
||
| 588 | ), ['exception' => $e]); |
||
| 589 | } |
||
| 590 | } |
||
| 591 | |||
| 592 | return $template; |
||
| 593 | } |
||
| 594 | |||
| 595 | private function render( |
||
| 596 | FieldDescriptionInterface $fieldDescription, |
||
| 597 | TemplateWrapper $template, |
||
| 598 | array $parameters, |
||
| 599 | Environment $environment |
||
| 600 | ): ?string { |
||
| 601 | $content = $template->render($parameters); |
||
| 602 | |||
| 603 | if ($environment->isDebug()) { |
||
| 604 | $commentTemplate = <<<'EOT' |
||
| 605 | |||
| 606 | <!-- START |
||
| 607 | fieldName: %s |
||
| 608 | template: %s |
||
| 609 | compiled template: %s |
||
| 610 | --> |
||
| 611 | %s |
||
| 612 | <!-- END - fieldName: %s --> |
||
| 613 | EOT; |
||
| 614 | |||
| 615 | return sprintf( |
||
| 616 | $commentTemplate, |
||
| 617 | $fieldDescription->getFieldName(), |
||
| 618 | $fieldDescription->getTemplate(), |
||
| 619 | $template->getSourceContext()->getName(), |
||
| 620 | $content, |
||
| 621 | $fieldDescription->getFieldName() |
||
| 622 | ); |
||
| 623 | } |
||
| 624 | |||
| 625 | return $content; |
||
| 626 | } |
||
| 627 | |||
| 628 | /** |
||
| 629 | * @throws ServiceCircularReferenceException |
||
| 630 | * @throws ServiceNotFoundException |
||
| 631 | */ |
||
| 632 | private function getTemplateRegistry(string $adminCode): TemplateRegistryInterface |
||
| 643 | |||
| 644 | /** |
||
| 645 | * Extracts the object and requested value from the $listElement. |
||
| 646 | * |
||
| 647 | * @param object|array $listElement |
||
| 648 | * |
||
| 649 | * @throws \TypeError when $listElement is not an object or an array with an object on offset 0 |
||
| 650 | * |
||
| 651 | * @return array An array containing object and value |
||
| 652 | */ |
||
| 653 | private function getObjectAndValueFromListElement( |
||
| 654 | $listElement, |
||
| 655 | FieldDescriptionInterface $fieldDescription |
||
| 656 | ): array { |
||
| 657 | if (\is_object($listElement)) { |
||
| 658 | $object = $listElement; |
||
| 659 | } elseif (\is_array($listElement)) { |
||
| 660 | if (!isset($listElement[0]) || !\is_object($listElement[0])) { |
||
| 661 | throw new \TypeError(sprintf('If argument 1 passed to %s() is an array it must contain an object at offset 0.', __METHOD__)); |
||
| 688 | } |
||
| 689 |
This check marks access to variables or properties that have not been declared yet. While PHP has no explicit notion of declaring a variable, accessing it before a value is assigned to it is most likely a bug.