make it simple, but not simpler

1 files changed, 218 insertions, 0 deletions

diff --git a/lib/ext/MyParsedown.php b/lib/ext/MyParsedown.php
new file mode 100644
index 0000000..71dfa7f
--- /dev/null
+++ b/lib/ext/MyParsedown.php
@@ -0,0 +1,218 @@
+<?php
+
+class MyParsedown extends ParsedownExtended {
+
+    function __construct(
+        ?array         $opts = null,
+        protected bool $useImagePreviews = false
+    ) {
+        $parsedown_opts = [
+            'tables' => [
+                'tablespan' => true
+            ]
+        ];
+        if (!is_null($opts)) {
+            $parsedown_opts = array_merge($parsedown_opts, $opts);
+        }
+        parent::__construct($parsedown_opts);
+
+        $this->InlineTypes['{'][] = 'FileAttach';
+        $this->InlineTypes['{'][] = 'Image';
+        $this->InlineTypes['{'][] = 'Video';
+        $this->inlineMarkerList .= '{';
+    }
+
+    protected function inlineFileAttach($excerpt) {
+        if (preg_match('/^{fileAttach:([\w]{8})}{\/fileAttach}/', $excerpt['text'], $matches)) {
+            $random_id = $matches[1];
+            $upload = uploads::getUploadByRandomId($random_id);
+            $result = [
+                'extent' => strlen($matches[0]),
+                'element' => [
+                    'name' => 'span',
+                    'text' => '',
+                ],
+                'type' => ''
+            ];
+
+            if (!$upload) {
+                return $result;
+            }
+
+            unset($result['element']['text']);
+
+            $ctx = self::getSkinContext();
+            $result['element']['rawHtml'] = $ctx->fileupload($upload->name, $upload->getDirectUrl(), $upload->note, $upload->getSize());
+
+            return $result;
+        }
+    }
+
+    protected function inlineImage($excerpt) {
+        global $config;
+
+        if (preg_match('/^{image:([\w]{8}),(.*?)}{\/image}/', $excerpt['text'], $matches)) {
+            $random_id = $matches[1];
+
+            $opts = [
+                'w' => 'auto',
+                'h' => 'auto',
+                'align' => 'left',
+                'nolabel' => false,
+            ];
+            $inputopts = explode(',', $matches[2]);
+
+            foreach ($inputopts as $opt) {
+                if ($opt == 'nolabel')
+                    $opts[$opt] = true;
+                else {
+                    list($k, $v) = explode('=', $opt);
+                    if (!isset($opts[$k]))
+                        continue;
+                    $opts[$k] = $v;
+                }
+            }
+
+            $image = uploads::getUploadByRandomId($random_id);
+            $result = [
+                'extent' => strlen($matches[0]),
+                'element' => [
+                    'name' => 'span',
+                    'text' => '',
+                ],
+                'type' => ''
+            ];
+
+            if (!$image) {
+                return $result;
+            }
+
+            list($w, $h) = $image->getImagePreviewSize(
+                $opts['w'] == 'auto' ? null : $opts['w'],
+                $opts['h'] == 'auto' ? null : $opts['h']
+            );
+            $opts['w'] = $w;
+            // $opts['h'] = $h;
+
+            if (!$this->useImagePreviews)
+                $image_url = $image->getDirectUrl();
+            else
+                $image_url = $image->getDirectPreviewUrl($w, $h);
+
+            unset($result['element']['text']);
+
+            $ctx = self::getSkinContext();
+            $result['element']['rawHtml'] = $ctx->image(
+                w: $opts['w'],
+                nolabel: $opts['nolabel'],
+                align: $opts['align'],
+                padding_top: round($h / $w * 100, 4),
+                may_have_alpha: $image->imageMayHaveAlphaChannel(),
+
+                url: $image_url,
+                direct_url: $image->getDirectUrl(),
+                note: $image->note
+            );
+
+            return $result;
+        }
+    }
+
+    protected function inlineVideo($excerpt) {
+        if (preg_match('/^{video:([\w]{8})(?:,(.*?))?}{\/video}/', $excerpt['text'], $matches)) {
+            $random_id = $matches[1];
+
+            $opts = [
+                'w' => 'auto',
+                'h' => 'auto',
+                'align' => 'left',
+                'nolabel' => false,
+            ];
+            $inputopts = !empty($matches[2]) ? explode(',', $matches[2]) : [];
+
+            foreach ($inputopts as $opt) {
+                if ($opt == 'nolabel')
+                    $opts[$opt] = true;
+                else {
+                    list($k, $v) = explode('=', $opt);
+                    if (!isset($opts[$k]))
+                        continue;
+                    $opts[$k] = $v;
+                }
+            }
+
+            $video = uploads::getUploadByRandomId($random_id);
+            $result = [
+                'extent' => strlen($matches[0]),
+                'element' => [
+                    'name' => 'span',
+                    'text' => '',
+                ],
+                'type' => ''
+            ];
+
+            if (!$video) {
+                return $result;
+            }
+
+            $video_url = $video->getDirectUrl();
+
+            unset($result['element']['text']);
+
+            $ctx = self::getSkinContext();
+            $result['element']['rawHtml'] = $ctx->video(
+                url: $video_url,
+                w: $opts['w'],
+                h: $opts['h']
+            );
+
+            return $result;
+        }
+    }
+
+    protected function paragraph($line) {
+        if (preg_match('/^{fileAttach:([\w]{8})}{\/fileAttach}$/', $line['text'])) {
+            return $this->inlineFileAttach($line);
+        }
+        if (preg_match('/^{image:([\w]{8}),(?:.*?)}{\/image}/', $line['text'])) {
+            return $this->inlineImage($line);
+        }
+        if (preg_match('/^{video:([\w]{8})(?:,(?:.*?))?}{\/video}/', $line['text'])) {
+            return $this->inlineVideo($line);
+        }
+        return parent::paragraph($line);
+    }
+
+    protected function blockFencedCodeComplete($block) {
+        if (!isset($block['element']['element']['attributes'])) {
+            return $block;
+        }
+
+        $code = $block['element']['element']['text'];
+        $languageClass = $block['element']['element']['attributes']['class'];
+        $language = explode('-', $languageClass);
+
+        if ($language[1] == 'term') {
+            $lines = explode("\n", $code);
+            for ($i = 0; $i < count($lines); $i++) {
+                $line = $lines[$i];
+                if (str_starts_with($line, '$ ') || str_starts_with($line, '# ')) {
+                    $lines[$i] = '<span class="term-prompt">'.substr($line, 0, 2).'</span>'.htmlspecialchars(substr($line, 2), ENT_NOQUOTES, 'UTF-8');
+                } else {
+                    $lines[$i] = htmlspecialchars($line, ENT_NOQUOTES, 'UTF-8');
+                }
+            }
+            $block['element']['element']['rawHtml'] = implode("\n", $lines);
+            unset($block['element']['element']['text']);
+
+            return $block;
+        }
+
+        return parent::blockFencedCodeComplete($block);
+    }
+
+    protected static function getSkinContext(): SkinContext {
+        return new SkinContext('\\skin\\markdown');
+    }
+
+}