3 files changed, 111 insertions, 0 deletions

diff --git a/application/formatter/Parsedown/ShaarliParsedown.php b/application/formatter/Parsedown/ShaarliParsedown.php
new file mode 100644
index 00000000..8eb48fda
--- /dev/null
+++ b/application/formatter/Parsedown/ShaarliParsedown.php
@@ -0,0 +1,15 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Shaarli\Formatter\Parsedown;
+
+/**
+ * Parsedown extension for Shaarli.
+ *
+ * Extension for both Parsedown and ParsedownExtra centralized in ShaarliParsedownTrait.
+ */
+class ShaarliParsedown extends \Parsedown
+{
+    use ShaarliParsedownTrait;
+}
diff --git a/application/formatter/Parsedown/ShaarliParsedownExtra.php b/application/formatter/Parsedown/ShaarliParsedownExtra.php
new file mode 100644
index 00000000..15a35da4
--- /dev/null
+++ b/application/formatter/Parsedown/ShaarliParsedownExtra.php
@@ -0,0 +1,15 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Shaarli\Formatter\Parsedown;
+
+/**
+ * ParsedownExtra extension for Shaarli.
+ *
+ * Extension for both Parsedown and ParsedownExtra centralized in ShaarliParsedownTrait.
+ */
+class ShaarliParsedownExtra extends \ParsedownExtra
+{
+    use ShaarliParsedownTrait;
+}
diff --git a/application/formatter/Parsedown/ShaarliParsedownTrait.php b/application/formatter/Parsedown/ShaarliParsedownTrait.php
new file mode 100644
index 00000000..ed7b1747
--- /dev/null
+++ b/application/formatter/Parsedown/ShaarliParsedownTrait.php
@@ -0,0 +1,81 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Shaarli\Formatter\Parsedown;
+
+use Shaarli\Formatter\BookmarkDefaultFormatter as Formatter;
+
+/**
+ * Trait used for Parsedown and ParsedownExtra extension.
+ *
+ * Extended:
+ *   - Format links properly in search context
+ */
+trait ShaarliParsedownTrait
+{
+    /**
+     * @inheritDoc
+     */
+    protected function inlineLink($excerpt)
+    {
+        return $this->shaarliFormatLink(parent::inlineLink($excerpt), true);
+    }
+
+    /**
+     * @inheritDoc
+     */
+    protected function inlineUrl($excerpt)
+    {
+        return $this->shaarliFormatLink(parent::inlineUrl($excerpt), false);
+    }
+
+    /**
+     * Properly format markdown link:
+     *   - remove highlight tags from HREF attribute
+     *   - (optional) add highlight tags to link caption
+     *
+     * @param array|null $link     Parsedown formatted link array.
+     *                             It can be empty.
+     * @param bool       $fullWrap Add highlight tags the whole link caption
+     *
+     * @return array|null
+     */
+    protected function shaarliFormatLink(?array $link, bool $fullWrap): ?array
+    {
+        // If open and clean search tokens are found in the link, process.
+        if (
+            is_array($link)
+            && strpos($link['element']['attributes']['href'] ?? '', Formatter::SEARCH_HIGHLIGHT_OPEN) !== false
+            && strpos($link['element']['attributes']['href'] ?? '', Formatter::SEARCH_HIGHLIGHT_CLOSE) !== false
+        ) {
+            $link['element']['attributes']['href'] = $this->shaarliRemoveSearchTokens(
+                $link['element']['attributes']['href']
+            );
+
+            if ($fullWrap) {
+                $link['element']['text'] = Formatter::SEARCH_HIGHLIGHT_OPEN .
+                    $link['element']['text'] .
+                    Formatter::SEARCH_HIGHLIGHT_CLOSE
+                ;
+            }
+        }
+
+        return $link;
+    }
+
+    /**
+     * Remove open and close tags from provided string.
+     *
+     * @param string $entry input
+     *
+     * @return string Striped input
+     */
+    protected function shaarliRemoveSearchTokens(string $entry): string
+    {
+        $entry = str_replace(Formatter::SEARCH_HIGHLIGHT_OPEN, '', $entry);
+        $entry = str_replace(Formatter::SEARCH_HIGHLIGHT_CLOSE, '', $entry);
+
+        return $entry;
+    }
+}