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<?php |
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namespace SilverStripe\View\Shortcodes; |
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use SilverStripe\Core\Convert; |
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use SilverStripe\Core\Injector\Injector; |
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use SilverStripe\View\HTML; |
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use SilverStripe\View\Parsers\ShortcodeHandler; |
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use Embed\Adapters\Adapter; |
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use Embed\Embed; |
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use SilverStripe\View\Parsers\ShortcodeParser; |
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/** |
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* Provider for the [embed] shortcode tag used by the embedding service |
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* in the HTML Editor field. |
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* Provides the html needed for the frontend and the editor field itself. |
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*/ |
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class EmbedShortcodeProvider implements ShortcodeHandler |
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{ |
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/** |
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* Gets the list of shortcodes provided by this handler |
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* |
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* @return mixed |
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*/ |
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public static function get_shortcodes() |
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{ |
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return array('embed'); |
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} |
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/** |
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* Embed shortcode parser from Oembed. This is a temporary workaround. |
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* Oembed class has been replaced with the Embed external service. |
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* |
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* @param array $arguments |
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* @param string $content |
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* @param ShortcodeParser $parser |
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* @param string $shortcode |
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* @param array $extra |
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* |
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* @return string |
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*/ |
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public static function handle_shortcode($arguments, $content, $parser, $shortcode, $extra = array()) |
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{ |
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// Get service URL |
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if (!empty($content)) { |
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$serviceURL = $content; |
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} elseif (!empty($arguments['url'])) { |
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$serviceURL = $arguments['url']; |
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} else { |
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return ''; |
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} |
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// See https://github.com/oscarotero/Embed#example-with-all-options for service arguments |
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$serviceArguments = []; |
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if (!empty($arguments['width'])) { |
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$serviceArguments['min_image_width'] = $arguments['width']; |
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} |
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if (!empty($arguments['height'])) { |
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$serviceArguments['min_image_height'] = $arguments['height']; |
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} |
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// Allow resolver to be mocked |
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$dispatcher = null; |
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if (isset($extra['resolver'])) { |
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$dispatcher = Injector::inst()->create( |
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$extra['resolver']['class'], |
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$serviceURL, |
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$extra['resolver']['config'] |
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); |
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} |
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// Process embed |
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$embed = Embed::create($serviceURL, $serviceArguments, $dispatcher); |
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// Convert embed object into HTML |
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if ($embed && $embed instanceof Adapter) { |
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$result = static::embedForTemplate($embed, $arguments); |
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if ($result) { |
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return $result; |
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} |
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} |
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// Fallback to link to service |
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return static::linkEmbed($arguments, $serviceURL, $serviceURL); |
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} |
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/** |
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* @param Adapter $embed |
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* @param array $arguments Additional shortcode params |
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* @return string |
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*/ |
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public static function embedForTemplate($embed, $arguments) |
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{ |
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switch ($embed->getType()) { |
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case 'video': |
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case 'rich': |
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// Attempt to inherit width (but leave height auto) |
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if (empty($arguments['width']) && $embed->getWidth()) { |
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$arguments['width'] = $embed->getWidth(); |
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} |
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return self::videoEmbed($arguments, $embed->getCode()); |
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case 'link': |
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return self::linkEmbed($arguments, $embed->getUrl(), $embed->getTitle()); |
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case 'photo': |
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return self::photoEmbed($arguments, $embed->getUrl()); |
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default: |
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return null; |
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} |
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} |
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/** |
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* Build video embed tag |
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* |
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* @param array $arguments |
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* @param string $content Raw HTML content |
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* @return string |
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*/ |
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protected static function videoEmbed($arguments, $content) |
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{ |
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// Ensure outer div has given width (but leave height auto) |
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if (!empty($arguments['width'])) { |
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$arguments['style'] = 'width: ' . intval($arguments['width']) . 'px;'; |
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} |
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// Convert caption to <p> |
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if (!empty($arguments['caption'])) { |
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$xmlCaption = Convert::raw2xml($arguments['caption']); |
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$content .= "\n<p class=\"caption\">{$xmlCaption}</p>"; |
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} |
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unset($arguments['width']); |
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unset($arguments['height']); |
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unset($arguments['url']); |
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unset($arguments['caption']); |
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return HTML::createTag('div', $arguments, $content); |
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} |
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/** |
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* Build <a> embed tag |
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* |
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* @param array $arguments |
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* @param string $href |
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* @param string $title Default title |
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* @return string |
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*/ |
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protected static function linkEmbed($arguments, $href, $title) |
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{ |
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$title = !empty($arguments['caption']) ? ($arguments['caption']) : $title; |
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unset($arguments['caption']); |
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unset($arguments['width']); |
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unset($arguments['height']); |
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unset($arguments['url']); |
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$arguments['href'] = $href; |
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return HTML::createTag('a', $arguments, Convert::raw2xml($title)); |
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} |
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/** |
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* Build img embed tag |
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* |
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* @param array $arguments |
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* @param string $src |
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* @return string |
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*/ |
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protected static function photoEmbed($arguments, $src) |
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{ |
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$arguments['src'] = $src; |
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unset($arguments['url']); |
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return HTML::createTag('img', $arguments); |
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} |
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} |
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In PHP, under loose comparison (like
==
, or!=
, orswitch
conditions), values of different types might be equal.For
string
values, the empty string''
is a special case, in particular the following results might be unexpected: