From 8d1c6e52760686faf3907f2696eff54755cf04e2 Mon Sep 17 00:00:00 2001
From: Asko Nõmm <asko@bien.ee>
Date: Sat, 4 Dec 2021 17:33:56 -0300
Subject: Add strikethrough renderer

---
 src/clarktown/parsers/strikethrough.clj | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
 create mode 100644 src/clarktown/parsers/strikethrough.clj

(limited to 'src/clarktown/parsers')

diff --git a/src/clarktown/parsers/strikethrough.clj b/src/clarktown/parsers/strikethrough.clj
new file mode 100644
index 0000000..add4f6b
--- /dev/null
+++ b/src/clarktown/parsers/strikethrough.clj
@@ -0,0 +1,18 @@
+(ns clarktown.parsers.strikethrough
+  (:require
+    [clojure.string :as string]))
+
+
+(defn render
+  "Renders all occuring strikethrough text."
+  [block]
+  (loop [block block
+         matches (-> (re-seq #"~~.*?~~" block)
+                     distinct)]
+    (if (empty? matches)
+      block
+      (let [match (first matches)
+            value (subs match 2 (- (count match) 2))
+            replacement (str "<del>" value "</del>")]
+        (recur (string/replace block match replacement)
+               (drop 1 matches))))))
-- 
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