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<?php |
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namespace StoutLogic\AcfBuilder; |
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/** |
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* Manages an array of field configs |
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*/ |
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class FieldManager |
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{ |
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/** |
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* Array of fields |
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* @var array |
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*/ |
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private $fields; |
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/** |
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* @param array $fields optional default array of field configs |
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*/ |
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public function __construct($fields = []) |
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{ |
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$this->fields = $fields; |
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} |
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/** |
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* @return array[NamedBuilder] field configs |
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*/ |
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public function getFields() |
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{ |
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return $this->fields; |
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} |
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/** |
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* Return int of fields |
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* @return int field count |
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*/ |
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public function getCount() |
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{ |
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return count($this->getFields()); |
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} |
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/** |
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* Add field to end of array |
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* @param array|Builder $field Field array config or Builder |
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* @return void |
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*/ |
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public function pushField($field) |
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{ |
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$this->insertFields($field, $this->getCount()); |
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} |
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/** |
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* Remove last field from end of array |
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* @throws \OutOfRangeException if array is empty |
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* @return array|Builder Field array config or Builder |
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*/ |
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public function popField() |
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{ |
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if ($this->getCount() > 0) { |
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$fields = $this->removeFieldAtIndex($this->getCount() - 1); |
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return $fields[0]; |
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} |
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throw new \OutOfRangeException("Can't call popField when the field count is 0"); |
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} |
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/** |
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* Insert of field at a specific index |
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* @param NamedBuilder $fields a single field or an array of fields |
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* @param int $index insertion point |
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* @return void |
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*/ |
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public function insertFields($fields, $index) |
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{ |
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if (!$fields instanceof NamedBuilder && !is_array($fields)) { |
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return; |
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} |
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// If a singular field config, put into an array of fields |
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if ($fields instanceof NamedBuilder) { |
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$fields = [$fields]; |
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} |
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foreach ($fields as $i => $field) { |
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if ($this->validateField($field)) { |
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array_splice($this->fields, $index + $i, 0, [$field]); |
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} |
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} |
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} |
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/** |
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* Remove a field at a specific index |
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* @param int $index |
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* @return array removed field |
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*/ |
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private function removeFieldAtIndex($index) |
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{ |
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return array_splice($this->fields, $index, 1); |
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} |
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/** |
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* Remove a speicifc field by name |
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* @param string $name name of the field |
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* @return void |
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*/ |
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public function removeField($name) |
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{ |
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$index = $this->getFieldIndex($name); |
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$this->removeFieldAtIndex($index); |
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} |
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/** |
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* Replace a field with a single field or array of fields |
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* @param string $name name of field to replace |
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* @param array|Builder $field single or array of fields |
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* @return void |
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*/ |
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public function replaceField($name, $field) |
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{ |
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$index = $this->getFieldIndex($name); |
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$this->removeFieldAtIndex($index); |
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$this->insertFields($field, $index); |
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} |
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/** |
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* Check to see if a field name already exists |
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* @param string $name field name |
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* @return bool |
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*/ |
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public function fieldNameExists($name) |
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{ |
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try { |
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$this->getFieldIndex($name); |
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} catch (FieldNotFoundException $e) { |
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return false; |
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} |
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return true; |
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} |
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/** |
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* Return a field by name |
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* @param string $name field name |
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* @return FieldBuilder |
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*/ |
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public function getField($name) |
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{ |
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return $this->fields[$this->getFieldIndex($name)]; |
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} |
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/** |
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* Modify the configuration of a field |
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* @param string $name field name |
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* @param array $modifications field configuration |
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* @return void |
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*/ |
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public function modifyField($name, $modifications) |
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{ |
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$field = $this->getField($name)->updateConfig($modifications); |
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$this->replaceField($name, $field); |
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} |
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/** |
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* Validate a field |
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* @param NamedBuilder $field |
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* @return bool |
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*/ |
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private function validateField($field) |
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{ |
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return $this->validateFieldName($field); |
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} |
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/** |
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* Validates that a field's name doesn't already exist |
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* @param NamedBuilder $field |
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* @throws FieldNameCollisionException when the name already exists |
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* @return bool |
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*/ |
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private function validateFieldName($field) |
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{ |
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$fieldName = $field->getName(); |
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if (!$fieldName || $this->fieldNameExists($fieldName)) { |
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throw new FieldNameCollisionException("Field Name: `{$fieldName}` already exists."); |
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} |
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return true; |
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} |
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/** |
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* Return the index in the $this->fields array looked up by the field's name |
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* @param string $name Field Name |
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* @throws FieldNotFoundException if the field name doesn't exist |
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* @return int Field Index |
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*/ |
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public function getFieldIndex($name) |
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{ |
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foreach ($this->getFields() as $index => $field) { |
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if ($field->getName() === $name) { |
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return $index; |
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} |
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} |
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throw new FieldNotFoundException("Field `{$name}` not found."); |
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} |
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} |
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