<?php
/**
 * DokuWiki Syntax Plugin Web Component.
 * Implementatiojn of https://getbootstrap.com/docs/4.1/content/typography/#blockquotes
 *
 */
if (!defined('DOKU_INC')) {
    die();
}

require_once(__DIR__ . '/../webcomponent.php');

/**
 * All DokuWiki plugins to extend the parser/rendering mechanism
 * need to inherit from this class
 *
 * The name of the class must follow a pattern (don't change it)
 * ie:
 *    syntax_plugin_PluginName_ComponentName
 */
class syntax_plugin_webcomponent_blockquote extends DokuWiki_Syntax_Plugin
{


    const IMAGE_PATTERN = "\{\{(?:[^\}]|(?:\}[^\}]))+\}\}";


    /**
     * Syntax Type.
     *
     * Needs to return one of the mode types defined in $PARSER_MODES in parser.php
     * @see DokuWiki_Syntax_Plugin::getType()
     */
    function getType()
    {
        return 'protected';
    }

    /**
     * @return array
     * Allow which kind of plugin inside
     *
     * No one of array('container', 'formatting', 'substition', 'protected', 'disabled', 'paragraphs')
     * because we manage self the content and we call self the parser
     */
    public function getAllowedTypes()
    {
        return array();
    }

    /**
     * How Dokuwiki will add P element
     *
     * * 'normal' - The plugin can be used inside paragraphs
     *  * 'block'  - Open paragraphs need to be closed before plugin output - block should not be inside paragraphs
     *  * 'stack'  - Special case. Plugin wraps other paragraphs. - Stacks can contain paragraphs
     *
     * @see DokuWiki_Syntax_Plugin::getPType()
     */
    function getPType()
    {
        return 'block';
    }

    /**
     * @see Doku_Parser_Mode::getSort()
     * Higher number than the teaser-columns
     * because the mode with the lowest sort number will win out
     */
    function getSort()
    {
        return 200;
    }

    /**
     * Create a pattern that will called this plugin
     *
     * @see Doku_Parser_Mode::connectTo()
     * @param string $mode
     */
    function connectTo($mode)
    {

        $pattern = webcomponent::getLookAheadPattern($this->getPluginComponent());
        $this->Lexer->addEntryPattern($pattern, $mode, 'plugin_' . webcomponent::PLUGIN_NAME . '_' . $this->getPluginComponent());

    }

    public function postConnect()
    {

        $this->Lexer->addExitPattern('</' . self::getTagName() . '>', 'plugin_' . webcomponent::PLUGIN_NAME . '_' . $this->getPluginComponent());
        // Lookahead

        // Receive the cite
        $lookaheadPattern = webcomponent::getIncludeTagPattern(syntax_plugin_webcomponent_cite::getTag());
        $this->Lexer->addPattern($lookaheadPattern, 'plugin_' . webcomponent::PLUGIN_NAME . '_' . $this->getPluginComponent());

        // Receive the image
        $this->Lexer->addPattern(self::IMAGE_PATTERN, 'plugin_' . webcomponent::PLUGIN_NAME . '_' . $this->getPluginComponent());

    }

    /**
     *
     * The handle function goal is to parse the matched syntax through the pattern function
     * and to return the result for use in the renderer
     * This result is always cached until the page is modified.
     * @see DokuWiki_Syntax_Plugin::handle()
     *
     * @param string $match
     * @param int $state
     * @param int $pos
     * @param Doku_Handler $handler
     * @return array|bool
     */
    function handle($match, $state, $pos, Doku_Handler $handler)
    {

        switch ($state) {

            case DOKU_LEXER_ENTER:
                // Suppress the component name
                $match = utf8_substr($match, strlen($this->getPluginComponent()) + 1, -1);
                $parameters = webcomponent::parseMatch($match);
                return array($state, $parameters);

            case DOKU_LEXER_UNMATCHED :
                return array($state, $match);

            case DOKU_LEXER_MATCHED :

                $parameters = array();
                $citeTag = syntax_plugin_webcomponent_cite::getTag();
                if (preg_match('/<' . $citeTag . '>(.*)<\/' . $citeTag . '>/msSi', $match, $matches)) {
                    // We have a citation
                    $parameters['cite']['content'] = $matches[1];
                }

                if (preg_match('/' . self::IMAGE_PATTERN . '/msSi', $match, $matches)) {
                    // We have an image, we parse it (Doku_Handler_Parse_Media in handler.php)
                    $parameters['image'] = Doku_Handler_Parse_Media($match);
                }
                return array($state, $parameters);


            case DOKU_LEXER_EXIT :
                // Important to get an exit in the render phase
                return array($state, '');

        }

        return array();

    }

    /**
     * Render the output
     * @see DokuWiki_Syntax_Plugin::render()
     *
     * @param string $mode
     * @param Doku_Renderer $renderer
     * @param array $data - what the function handle() return'ed
     * @return bool
     */
    function render($mode, Doku_Renderer $renderer, $data)
    {

        if ($mode == 'xhtml') {

            /** @var Doku_Renderer_xhtml $renderer */
            list($state, $parameters) = $data;
            switch ($state) {

                case DOKU_LEXER_ENTER :
                    // w-75 for width 75
                    $class = "m-3";
                    if (array_key_exists("class", $parameters)) {
                        $class = $parameters["class"];
                    }
                    if ($class != "") {
                        $class = " " . $class;
                    }
                    $renderer->doc .= '<div class="card' . $class . '">' . DOKU_LF
                        . DOKU_TAB . '<div class="card-body">' . DOKU_LF
                        . DOKU_TAB . DOKU_TAB . '<' . self::getTagName() . ' class="' . self::getTagName() . ' m-0"';
                    // m-0 on the blockquote element is to correct a bottom margin from bootstrap of 1em that we don't want
                    $renderer->doc .= '>' . DOKU_LF;
                    break;

                case DOKU_LEXER_UNMATCHED :

                    $renderer->doc .= DOKU_TAB . DOKU_TAB . webcomponent::render($parameters) . DOKU_LF;
                    break;

                case DOKU_LEXER_MATCHED:

                    if (array_key_exists('cite', $parameters)) {
                        $content = $parameters['cite']['content'];
                        $renderer->doc .= DOKU_TAB . DOKU_TAB . '<footer class="blockquote-footer text-right"><cite>';
                        $renderer->doc .= webcomponent::render($content);
                        $renderer->doc .= "</cite></footer>" . DOKU_LF;
                    }

                    if (array_key_exists('image', $parameters)) {
                        $src = $parameters['image']['src'];
                        $width = $parameters['image']['width'];
                        $height = $parameters['image']['height'];
                        $title = $parameters['image']['title'];
                        //Snippet taken from $renderer->doc .= $renderer->internalmedia($src, $linking = 'nolink');
                        $renderer->doc .= '<img class="media my-3" src="' . ml($src, array('w' => $width, 'h' => $height, 'cache' => true)) . '" alt="' . $title . '" width="' . $width . '">';
                    }
                    break;

                case DOKU_LEXER_EXIT :

                    // Close the blockquote
                    $renderer->doc .= DOKU_TAB . DOKU_TAB . '</' . $this->getPluginComponent() . '>' . DOKU_LF
                        . DOKU_TAB . '</div>' . DOKU_LF;

                    // Close the card
                    $renderer->doc .= '</div>';

                    // Reinit
                    $this->content = "";
                    $this->img = "";
                    $this->cite = "";
                    break;
            }
            return true;
        }
        return false;
    }


    public static function getTagName()
    {
        list(/* $t */, /* $p */, /* $n */, $c) = explode('_', get_called_class(), 4);
        return (isset($c) ? $c : '');
    }


}