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@@ -0,0 +1,152 @@
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<?php namespace SokoWeb\View;
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class Linker
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{
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const INLINE_ASSET_LIMIT = 2000;
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private string $view;
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public function __construct(string $view)
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{
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$this->view = $view;
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}
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public function generate(): void
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{
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$input = ROOT . '/views/' . $this->view . '.php';
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$temporaryFiles = [];
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$sections = ['externalCss' => '', 'inlineCss' => '', 'externalJs' => '', 'inlineJs' => ''];
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$extra = ['', ''];
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do {
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$parser = new Parser($input);
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$fragment = $parser->parse();
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$extends = $fragment->getExtends();
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$this->generateAssets($fragment, $sections);
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$sections = array_merge($sections, $fragment->getSections()); //TODO: detect if section defined multiple times
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$extra[0] = $fragment->getExtra()[0] . $extra[0];
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$extra[1] = $extra[1] . $fragment->getExtra()[1];
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if ($extends === null) {
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$this->writeFinal($extra, $input, ROOT . '/cache/views/' . $this->view . '.php');
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break;
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}
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$tmpFile = tempnam(sys_get_temp_dir(), 'mapg-view-');
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$temporaryFiles[] = $tmpFile;
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$this->extendTemplate($sections, ROOT . '/views/' . $extends . '.php', $tmpFile);
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$input = $tmpFile;
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} while (true);
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foreach ($temporaryFiles as $tmpFile) {
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unlink($tmpFile);
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}
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}
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private function extendTemplate(array $sections, string $file, string $output): void
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{
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$inputFileHandle = fopen($file, 'r');
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if (!$inputFileHandle) {
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throw new \Exception('Cannot open file ' . $file);
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}
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$outputFileHandle = fopen($output, 'w');
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if (!$outputFileHandle) {
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throw new \Exception('Cannot open file ' . $output . 'for writing.');
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}
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$lineNumber = 0;
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while (($line = fgets($inputFileHandle)) !== false) {
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++$lineNumber;
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if (preg_match('/^\s*@yields\(\'([\w\/]+)\'\)\s*$/', $line, $matches) === 1) {
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if (isset($sections[$matches[1]])) {
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fwrite($outputFileHandle, $sections[$matches[1]]);
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}
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} else {
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fwrite($outputFileHandle, $line);
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}
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}
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fclose($inputFileHandle);
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fclose($outputFileHandle);
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}
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private function writeFinal(array $extra, string $file, string $output): void
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{
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$dirname = pathinfo($output, PATHINFO_DIRNAME);
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if (!is_dir($dirname)) {
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mkdir($dirname, 0755, true);
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}
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$inputFileHandle = fopen($file, 'r');
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if (!$inputFileHandle) {
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throw new \Exception('Cannot open file ' . $file);
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}
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$outputFileHandle = fopen($output, 'w');
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if (!$outputFileHandle) {
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throw new \Exception('Cannot open file ' . $output . 'for writing.');
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}
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fwrite($outputFileHandle, $extra[0]);
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while (($line = fgets($inputFileHandle)) !== false) {
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fwrite($outputFileHandle, $line);
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}
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fwrite($outputFileHandle, $extra[1]);
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fclose($inputFileHandle);
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fclose($outputFileHandle);
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}
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private function generateAssets(ParsedFragment $fragment, array &$sections): void
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{
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foreach ($fragment->getCss() as $cssFile) {
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$asset = $this->parseAsset($cssFile);
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if (isset($asset['code'])) {
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$sections['inlineCss'] .= '<style>' . PHP_EOL;
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$sections['inlineCss'] .= $asset['code'];
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$sections['inlineCss'] .= '</style>' . PHP_EOL;
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} elseif (isset($asset['file'])) {
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$sections['externalCss'] .= '<link href="' . $asset['file'] . '" rel="stylesheet">' . PHP_EOL;
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}
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}
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foreach ($fragment->getJs() as $jsFile) {
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$asset = $this->parseAsset($jsFile);
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if (isset($asset['code'])) {
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$sections['inlineJs'] .= '<script>' . PHP_EOL;
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$sections['inlineJs'] .= $asset['code'];
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$sections['inlineJs'] .= '</script>' . PHP_EOL;
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} elseif (isset($asset['file'])) {
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$sections['externalJs'] .= '<script src="' . $asset['file'] . '"></script>' . PHP_EOL;
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}
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}
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}
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private function parseAsset(string $asset): array
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{
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$output = [];
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if (preg_match('/^[\w\/\.]+$/', $asset) === 1) {
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if (
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empty($_ENV['DEV']) &&
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filesize(ROOT . '/public/static/' . $asset) < self::INLINE_ASSET_LIMIT
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) {
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$output['code'] = file_get_contents(ROOT . '/public/static/' . $asset);
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} else {
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$output['file'] = '<?= $_ENV[\'STATIC_ROOT\'] ?>/' . $asset . '?rev=<?= REVISION ?>';
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}
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} else {
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$output['file'] = $asset;
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}
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return $output;
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}
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}
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@@ -0,0 +1,48 @@
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<?php namespace SokoWeb\View;
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class ParsedFragment
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{
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private ?string $extends;
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private array $css;
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private array $js;
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private array $sections;
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private array $extra;
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public function __construct(?string $extends, array $css, array $js, array $sections, array $extra)
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{
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$this->extends = $extends;
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$this->css = $css;
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$this->js = $js;
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$this->sections = $sections;
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$this->extra = $extra;
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}
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public function getExtends(): ?string
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{
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return $this->extends;
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}
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public function getCss(): array
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{
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return $this->css;
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}
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public function getJs(): array
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{
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return $this->js;
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}
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public function getSections(): array
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{
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return $this->sections;
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}
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public function getExtra(): array
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{
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return $this->extra;
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}
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}
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@@ -0,0 +1,159 @@
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<?php namespace SokoWeb\View;
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class Parser
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{
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private string $file;
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public function __construct(string $file)
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{
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$this->file = $file;
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}
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public function parse(): ParsedFragment
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{
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$sectionOpen = null;
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$extraOpen = false;
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$extends = null;
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$js = [];
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$css = [];
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$sections = [];
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$extra = ['', ''];
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$fileHandle = fopen($this->file, 'r');
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if (!$fileHandle) {
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throw new \Exception('Cannot open file ' . $this->file);
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}
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$lineNumber = 0;
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while (($line = fgets($fileHandle)) !== false) {
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++$lineNumber;
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if (($cssMatched = $this->matchCss($line)) !== null) {
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$css[] = $cssMatched;
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continue;
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}
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if (($jsMatched = $this->matchJs($line)) !== null) {
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$js[] = $jsMatched;
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continue;
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}
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if (($extendsMatched = $this->matchExtends($line)) !== null) {
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if ($extends !== null) {
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throw new \Exception('Error in file ' . $this->file . ' in line ' . $lineNumber . ' - There is already an \'@extends\' declared.');
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}
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$extends = $extendsMatched;
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continue;
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}
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if (($sectionMatched = $this->matchSection($line)) !== null) {
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if ($extends === null) {
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throw new \Exception('Error in file ' . $this->file . ' in line ' . $lineNumber . ' - \'@section\' has no meaning if view extends nothing.');
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}
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if ($sectionOpen !== null) {
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throw new \Exception('Parse error in file ' . $this->file . ' in line ' . $lineNumber . ' - A \'@section\' is already open (no \'@endsection\' found).');
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}
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$sectionOpen = $sectionMatched;
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$sections[$sectionOpen] = '';
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continue;
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}
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if ($this->matchEndSection($line)) {
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if ($sectionOpen === null) {
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throw new \Exception('Parse error in file ' . $this->file . ' in line ' . $lineNumber . ' - Cannot end section until no \'@section\' is open.');
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}
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$sectionOpen = null;
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}
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if ($this->matchExtra($line)) {
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if ($extraOpen) {
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throw new \Exception('Parse error in file ' . $this->file . ' in line ' . $lineNumber . ' - An \'@extra\' is already open (no \'@endextra\' found).');
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}
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$extraOpen = true;
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continue;
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}
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if ($this->matchEndExtra($line)) {
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if (!$extraOpen) {
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throw new \Exception('Parse error in file ' . $this->file . ' in line ' . $lineNumber . ' - Cannot end extra until no \'@extra\' is open.');
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}
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$extraOpen = false;
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}
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if ($sectionOpen !== null) {
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$sections[$sectionOpen] .= $line;
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}
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if ($extraOpen) {
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$offset = $extends === null ? 0 : 1;
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$extra[$offset] .= $line;
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}
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}
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fclose($fileHandle);
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return new ParsedFragment($extends, $css, $js, $sections, $extra);
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}
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private function matchCss(string $line): ?string
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{
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if (preg_match('/^\s*@css\((.*)\)\s*$/', $line, $matches) === 1) {
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return $matches[1];
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}
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return null;
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}
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private function matchJs(string $line): ?string
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{
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if (preg_match('/^\s*@js\((.*)\)\s*$/', $line, $matches) === 1) {
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return $matches[1];
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}
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return null;
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}
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private function matchExtends(string $line): ?string
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{
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if (preg_match('/^\s*@extends\(([\w\/]+)\)\s*$/', $line, $matches) === 1) {
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return $matches[1];
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}
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return null;
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}
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private function matchSection(string $line): ?string
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{
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if (preg_match('/^\s*@section\((\w+)\)\s*$/', $line, $matches) === 1) {
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return $matches[1];
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}
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return null;
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}
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private function matchEndSection(string $line): bool
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{
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return preg_match('/^\s*@endsection(?:\(\))?\s*$/', $line) === 1;
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}
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private function matchExtra(string $line): bool
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{
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return preg_match('/^\s*@extra(?:\(\))?\s*$/', $line) === 1;
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}
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private function matchEndExtra(string $line): bool
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{
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return preg_match('/^\s*@endextra(?:\(\))?\s*$/', $line) === 1;
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}
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}
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