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<?php |
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|
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namespace ImportWP\Common\Importer\Parser; |
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|
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use ImportWP\Common\Importer\ParserInterface; |
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|
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class JSONParser extends AbstractParser implements ParserInterface |
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{ |
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/** |
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* Decoded JSON record. |
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* |
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* @var array|null |
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*/ |
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private $json_record; |
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|
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/** |
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* Active sub-record when expanding a group base. |
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* |
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* @var array|null |
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*/ |
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private $query_base_record; |
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|
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/** |
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* Query a value from the current JSON record. |
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* |
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* Paths are slash-delimited relative to the record root, e.g. "/id", "/author/name". |
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* Legacy flat keys without a leading slash are also supported. |
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* |
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* @param string $query |
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* @param bool $as_string |
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* @return mixed |
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*/ |
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public function query($query, $as_string = true) |
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{ |
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$value = $this->resolvePath($query, $this->getActiveRecord()); |
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|
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if ($value === null || $value === false) { |
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return $as_string ? '' : false; |
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} |
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|
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if (!$as_string) { |
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return $value; |
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} |
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|
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if (is_array($value)) { |
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if ($this->isList($value)) { |
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$parts = []; |
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foreach ($value as $item) { |
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if (is_scalar($item) || $item === null) { |
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$parts[] = (string) $item; |
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} else { |
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$parts[] = wp_json_encode($item); |
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} |
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} |
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return implode(',', $parts); |
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} |
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|
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return wp_json_encode($value); |
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} |
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|
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return (string) $value; |
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} |
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|
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/** |
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* Query a group of JSON data, optionally expanding a nested array via base. |
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* |
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* @param array $group |
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* @return array |
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*/ |
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public function queryGroup($group) |
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{ |
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if (isset($group['base']) && $group['base'] !== '') { |
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$output = []; |
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$sub_records = $this->query($group['base'], false); |
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|
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if (!is_array($sub_records)) { |
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return []; |
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} |
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|
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if (!$this->isList($sub_records)) { |
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$sub_records = [$sub_records]; |
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} |
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|
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foreach ($sub_records as $record) { |
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if (!is_array($record)) { |
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continue; |
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} |
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$this->query_base_record = $record; |
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$output[] = parent::queryGroup($group); |
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} |
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$this->query_base_record = null; |
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|
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return $output; |
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} |
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|
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return parent::queryGroup($group); |
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} |
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|
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protected function onRecordLoaded() |
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{ |
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$this->json_record = json_decode($this->record, true); |
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$this->query_base_record = null; |
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|
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if (!is_array($this->json_record)) { |
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$this->json_record = []; |
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} |
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} |
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|
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public function record() |
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{ |
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return $this->json_record; |
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} |
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|
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/** |
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* @return array|null |
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*/ |
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private function getActiveRecord() |
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{ |
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if (is_array($this->query_base_record)) { |
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return $this->query_base_record; |
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} |
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|
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return $this->json_record; |
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} |
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|
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/** |
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* Resolve a slash path against a record array. |
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* |
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* @param string $query |
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* @param array|null $record |
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* @return mixed |
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*/ |
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private function resolvePath($query, $record) |
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{ |
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if (!is_array($record)) { |
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return null; |
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} |
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|
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$query = (string) $query; |
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if ($query === '' || $query === '/') { |
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return $record; |
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} |
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|
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if (strpos($query, '/') === 0) { |
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$query = substr($query, 1); |
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} |
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|
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// Legacy flat key: no slashes |
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if (strpos($query, '/') === false) { |
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return array_key_exists($query, $record) ? $record[$query] : null; |
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} |
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|
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$segments = explode('/', $query); |
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$current = $record; |
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|
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foreach ($segments as $segment) { |
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if ($segment === '') { |
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continue; |
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} |
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if (!is_array($current) || !array_key_exists($segment, $current)) { |
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return null; |
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} |
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$current = $current[$segment]; |
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} |
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|
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return $current; |
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} |
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|
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/** |
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* @param array $data |
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* @return bool |
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*/ |
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private function isList(array $data) |
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{ |
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if ($data === []) { |
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return true; |
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} |
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|
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return array_keys($data) === range(0, count($data) - 1); |
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} |
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} |
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|
