commit for publication

static/utils/validation.js

@@ -0,0 +1,48 @@
+
+const VALID = true;
+const INVALID = false;
+
+
+class validation {
+
+    static mac_addr(addr) {
+
+        const VALID_MAC_CHARS = "0123456789abcdefABCDEF";
+
+        if (addr.length !== 17) {
+            return INVALID;
+        }
+
+        const COLON_START_IDX = 2;
+        const COLON_STEP = 3;
+        for (let idx = COLON_START_IDX; idx < addr.length; idx += COLON_STEP) {
+            if (addr[idx] != ":") {
+                return INVALID;
+            }
+        }
+
+        const mac_sections = addr.split(":");
+        if (mac_sections.length !== 6) {
+            return INVALID;
+        }
+
+        for (const mac_byte of mac_sections) {
+
+            if (mac_byte.length !== 2) {
+                return INVALID;
+            }
+
+            for (const char of mac_byte) {
+                if (!VALID_MAC_CHARS.includes(char)) {
+                    return INVALID;
+                }
+            }
+        }
+
+        return VALID;
+
+    }
+
+}
+
+