From a11b93480dd35e1ab03981c36bb9f451e6e786bb Mon Sep 17 00:00:00 2001
From: Baipyrus <simon.waltemathe@gmail.com>
Date: Fri, 13 Jan 2023 12:05:17 +0100
Subject: [PATCH] execute command for math and logic calculations

---
 js/commands.js | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/js/commands.js b/js/commands.js
index 123c471..7acf81b 100644
--- a/js/commands.js
+++ b/js/commands.js
@@ -5,4 +5,24 @@ function cmd_help() {
 function cmd_clear() {
     window.location.reload();
     return "";
+}
+
+function cmd_exec(input) {
+    if (input === undefined)
+        return "You must enter parameters!";
+    const str = input.join(' ');
+    if (/[',:;a-zA-Z]/.test(str) || str === "")
+        return "Invalid input!";
+    const chars = str.split('').filter(e => {
+        const code = e.charCodeAt(0);
+        const s = code ===  32;
+        const a = code >    36;
+        const b = code <    63;
+        const c = code ===  94;
+        const d = code === 124;
+        return !(s || a && b || c || d);
+    });
+    if (chars.length > 0)
+        return "Invalid input!";
+    return (new Function(`return ${str}`))();
 }
\ No newline at end of file