--- /dev/null
+<?php
+
+/**
+ * Plugin Markdown.
+ *
+ * Shaare's descriptions are parsed with Markdown.
+ */
+
+require_once 'Parsedown.php';
+
+/**
+ * Parse linklist descriptions.
+ *
+ * @param array $data linklist data.
+ *
+ * @return mixed linklist data parsed in markdown (and converted to HTML).
+ */
+function hook_markdown_render_linklist($data)
+{
+ foreach ($data['links'] as &$value) {
+ $value['description'] = process_markdown($value['description']);
+ }
+
+ return $data;
+}
+
+/**
+ * Parse daily descriptions.
+ *
+ * @param array $data daily data.
+ *
+ * @return mixed daily data parsed in markdown (and converted to HTML).
+ */
+function hook_markdown_render_daily($data)
+{
+ // Manipulate columns data
+ foreach ($data['cols'] as &$value) {
+ foreach ($value as &$value2) {
+ $value2['formatedDescription'] = process_markdown($value2['formatedDescription']);
+ }
+ }
+
+ return $data;
+}
+
+/**
+ * When link list is displayed, include markdown CSS.
+ *
+ * @param array $data includes data.
+ *
+ * @return mixed - includes data with markdown CSS file added.
+ */
+function hook_markdown_render_includes($data)
+{
+ if ($data['_PAGE_'] == Router::$PAGE_LINKLIST
+ || $data['_PAGE_'] == Router::$PAGE_DAILY
+ || $data['_PAGE_'] == Router::$PAGE_EDITLINK
+ ) {
+
+ $data['css_files'][] = PluginManager::$PLUGINS_PATH . '/markdown/markdown.css';
+ }
+
+ return $data;
+}
+
+/**
+ * Hook render_editlink.
+ * Adds an help link to markdown syntax.
+ *
+ * @param array $data data passed to plugin
+ *
+ * @return array altered $data.
+ */
+function hook_markdown_render_editlink($data)
+{
+ // Load help HTML into a string
+ $data['edit_link_plugin'][] = file_get_contents(PluginManager::$PLUGINS_PATH .'/markdown/help.html');
+ return $data;
+}
+
+
+/**
+ * Remove HTML links auto generated by Shaarli core system.
+ * Keeps HREF attributes.
+ *
+ * @param string $description input description text.
+ *
+ * @return string $description without HTML links.
+ */
+function reverse_text2clickable($description)
+{
+ return preg_replace('!<a +href="([^ ]*)">[^ ]+</a>!m', '$1', $description);
+}
+
+/**
+ * Remove <br> tag to let markdown handle it.
+ *
+ * @param string $description input description text.
+ *
+ * @return string $description without <br> tags.
+ */
+function reverse_nl2br($description)
+{
+ return preg_replace('!<br */?>!im', '', $description);
+}
+
+/**
+ * Remove HTML spaces ' ' auto generated by Shaarli core system.
+ *
+ * @param string $description input description text.
+ *
+ * @return string $description without HTML links.
+ */
+function reverse_space2nbsp($description)
+{
+ return preg_replace('/(^| ) /m', '$1 ', $description);
+}
+
+/**
+ * Remove '>' at start of line auto generated by Shaarli core system
+ * to allow markdown blockquotes.
+ *
+ * @param string $description input description text.
+ *
+ * @return string $description without HTML links.
+ */
+function reset_quote_tags($description)
+{
+ return preg_replace('/^( *)> /m', '$1> ', $description);
+}
+
+/**
+ * Render shaare contents through Markdown parser.
+ * 1. Remove HTML generated by Shaarli core.
+ * 2. Generate markdown descriptions.
+ * 3. Wrap description in 'markdown' CSS class.
+ *
+ * @param string $description input description text.
+ *
+ * @return string HTML processed $description.
+ */
+function process_markdown($description)
+{
+ $parsedown = new Parsedown();
+
+ $processedDescription = $description;
+ $processedDescription = reverse_text2clickable($processedDescription);
+ $processedDescription = reverse_nl2br($processedDescription);
+ $processedDescription = reverse_space2nbsp($processedDescription);
+ $processedDescription = reset_quote_tags($processedDescription);
+ $processedDescription = $parsedown
+ ->setMarkupEscaped(false)
+ ->setBreaksEnabled(true)
+ ->text($processedDescription);
+ $processedDescription = '<div class="markdown">'. $processedDescription . '</div>';
+
+ return $processedDescription;
+}