initial rust commit

amnet-server/src/utils.rs

@@ -0,0 +1,38 @@
+pub (in crate) fn format_hex_bytes(bytes: &[u8]) -> String {
+    bytes.chunks(2)
+        .map(|chunk| chunk.iter().map(|b| format!("{:02X}", b)).collect::<String>())
+        .collect::<Vec<_>>()
+        .join(" ")
+}
+
+pub (in crate) fn parse_access_code(code: &String) -> Option<[u8; 10]> {
+    let matrix_code = format!("{:0>20}", code.replace(" ", ""));
+    let mut bytes: [u8; 10] = [0; 10];
+
+    for i in 0..bytes.len() {
+        let slice_str = &matrix_code[i*2..i*2+2];
+        let slice_val = u8::from_str_radix(slice_str, 16).ok()?;
+
+        bytes[i] = slice_val;
+    }
+
+    Some(bytes)
+}
+
+pub (in crate) fn parse_idm_hex(idm_hex: &String) -> Option<[u8; 8]> {
+    if idm_hex.len() > 16 || !idm_hex.chars().all(|c| c.is_ascii_hexdigit()) {
+        return None;
+    }
+
+    let padded_idm = format!("{:0>16}", idm_hex);
+    let mut idm_bytes: [u8; 8] = [0; 8];
+
+    for i in 0..idm_bytes.len() {
+        let slice_str = &padded_idm[i*2..i*2+2];
+        let slice_val = u8::from_str_radix(slice_str, 16).ok()?;
+
+        idm_bytes[i] = slice_val;
+    }
+
+    Some(idm_bytes)
+}