Method readData

lib/Datasource/Regex.php:64–120

* Read the Data * @param $option * @return array available options of the data source */

($option)

     * @return array available options of the data source
     */
	public function readData($option): array
	{
		$regex = isset($option['regex']) ? htmlspecialchars_decode($option['regex'], ENT_NOQUOTES) : '';
		$url = isset($option['url']) ? htmlspecialchars_decode($option['url'], ENT_NOQUOTES) : '';
		$urlError = ExternalUrlValidator::validate($url);
		if ($urlError !== null) {
			return [
				'header' => ['', 'Dimension2', 'Count'],
				'dimensions' => ['', 'Dimension2'],
				'data' => [],
				'error' => $urlError,
			];
		}

		// Fetch HTML content using cURL
		[$curlResult, $httpCode] = $this->fetchUrlContent($url);

		$header = ['', 'Dimension2', 'Count'];

		// Early return on HTTP error
		if ($httpCode < 200 || $httpCode >= 300) {
			return [
				'header' => $header,
				'dimensions' => ['', 'Dimension2'],
				'data' => [],
				'error' => 'HTTP response code: ' . $httpCode,
				'rawData' => $curlResult,
				'URL' => $url,
			];
		}

		// Apply regex and build data
		preg_match_all($regex, $curlResult, $matches);

		$dimensions = $matches['dimension'] ?? [];
		$values = $matches['value'] ?? [];
		$limit = isset($option['limit']) && (int)$option['limit'] > 0 ? (int)$option['limit'] : count($dimensions);

		// Use array_map for efficient data construction
		$data = [];
		for ($i = 0; $i < min($limit, count($dimensions), count($values)); $i++) {
			$data[] = [
				$option['name'] ?? '',
				$dimensions[$i],
				$values[$i]
			];
		}

		return [
			'header' => $header,
			'dimensions' => array_slice($header, 0, count($header) - 1),
			'data' => $data,
			'error' => 0,
			'rawData' => $curlResult,
			'URL' => $url,
		];
	}