finish implementing features, add logging, windows-specific features

amnet-server/src/utils.rs

@@ -36,3 +36,26 @@ pub (crate) fn parse_idm_hex(idm_hex: &String) -> Option<[u8; 8]> {
 
     Some(idm_bytes)
 }
+
+pub (crate) fn is_valid_access_code(code: &String) -> bool {
+    if code.len() > 20 {
+        return false;
+    }
+
+    let cleaned_code: String = code.chars().filter(|c| !c.is_whitespace()).collect();
+
+    if cleaned_code.len() != 20 {
+        return false;
+    }
+
+    let mut seen_non_zero = false;
+    let is_all_digits = cleaned_code.chars().all(|c| {
+        if c != '0' {
+            seen_non_zero = true;
+        }
+
+        c.is_ascii_digit()
+    });
+
+    is_all_digits && seen_non_zero
+}