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<?php |
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/** |
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* This file is part of the Disqus Helper package. |
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* |
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* Copyright (c) Nikola Posa <[email protected]> |
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* |
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* For full copyright and license information, please refer to the LICENSE file, |
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* located at the package root folder. |
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*/ |
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namespace DisqusHelper; |
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final class Code |
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{ |
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const INDENT = ' '; |
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/** |
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* @var string |
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*/ |
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private $shortName; |
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/** |
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* @var array |
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*/ |
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private $config = []; |
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/** |
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* @var array |
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*/ |
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private $scriptFiles = []; |
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/** |
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* @var array |
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*/ |
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private $htmlFragments = []; |
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private function __construct() |
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{ |
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} |
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public static function create(string $shortName) : Code |
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{ |
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$code = new self(); |
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$code->shortName = $shortName; |
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return $code; |
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} |
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public function mergeConfig(array $config) : Code |
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{ |
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$this->config = array_merge($this->config, $config); |
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return $this; |
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} |
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public function getConfig() : array |
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{ |
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return $this->config; |
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} |
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public function addScriptFile(string $name, array $options = []) : Code |
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{ |
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if (!isset($this->scriptFiles[$name])) { |
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$data = array_merge([ |
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'name' => $name, |
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'id' => null, |
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'lazy_load' => false, |
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], $options); |
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$this->scriptFiles[$name] = $data; |
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} |
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return $this; |
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} |
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public function hasScriptFile(string $fileName) : bool |
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{ |
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return isset($this->scriptFiles[$fileName]); |
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} |
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public function __toString() : string |
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{ |
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return $this->toHtml(); |
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} |
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public function toHtml() : string |
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{ |
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$this->htmlFragments = []; |
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$this->buildConfigVariablesHtml(); |
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$this->buildJsFilesHtml(); |
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return PHP_EOL . implode(PHP_EOL . PHP_EOL, $this->htmlFragments) . PHP_EOL; |
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} |
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private function buildConfigVariablesHtml() |
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{ |
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if (empty($this->config)) { |
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return; |
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} |
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$script = '<script>' . PHP_EOL; |
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$script .= self::INDENT . 'var disqus_config = function () {' . PHP_EOL; |
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foreach ($this->config as $key => $value) { |
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if (is_string($value)) { |
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$value = addslashes($value); |
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$value = "'$value'"; |
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} |
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$script .= self::INDENT . self::INDENT . "this.$key = $value;" . PHP_EOL; |
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} |
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$script .= self::INDENT . '};' . PHP_EOL ; |
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$script .= '</script>'; |
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$this->htmlFragments[] = $script; |
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} |
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private function buildJsFilesHtml() |
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{ |
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foreach ($this->scriptFiles as $fileData) { |
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if ($fileData['lazy_load']) { |
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$this->htmlFragments[] = $this->renderLazyLoadedJsFile($fileData); |
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continue; |
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} |
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$this->htmlFragments[] = $this->renderJsFile($fileData); |
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} |
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} |
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private function renderJsFile(array $fileData) : string |
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{ |
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return sprintf( |
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'<script id="%2$s" src="%1$s" async></script>', |
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$this->getJsFileUrl($fileData['name']), |
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$fileData['id'] |
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); |
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} |
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private function renderLazyLoadedJsFile(array $fileData) : string |
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{ |
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$script = '<script>' . PHP_EOL; |
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$script .= self::INDENT . '(function() {' . PHP_EOL; |
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$script .= self::INDENT . self::INDENT . 'var d = document, s = d.createElement("script");' . PHP_EOL; |
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$script .= self::INDENT . self::INDENT . 's.src = "' . $this->getJsFileUrl($fileData['name']) . '";' . PHP_EOL; |
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$script .= self::INDENT . self::INDENT . 's.setAttribute("data-timestamp", +new Date());' . PHP_EOL; |
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$script .= self::INDENT . self::INDENT . '(d.head || d.body).appendChild(s);' . PHP_EOL; |
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$script .= self::INDENT . '})();' . PHP_EOL; |
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$script .= '</script>'; |
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return $script; |
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} |
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private function getJsFileUrl(string $fileName) |
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{ |
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return '//' . $this->shortName . '.disqus.com/' . $fileName; |
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} |
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} |
nikolaposa /
disqus-helper
