refactor: breaking refactor of domo_proto and domo_node

domo_proto/src/identifier.rs

@@ -0,0 +1,75 @@
+use std::fmt::{Display, Formatter, LowerHex};
+use rand::random;
+
+/// Helper struct for the identifiers used in `dest`, `src`, `packet_id` and `reply_to`.
+#[derive(Debug, Eq, PartialEq, Copy, Clone, Hash)]
+pub struct Identifier {
+    pub bytes: [u8; 4],
+}
+
+impl Identifier {
+    pub fn random() -> Identifier {
+        Identifier::from(random::<u32>())
+    }
+}
+
+impl Default for Identifier {
+    fn default() -> Self {
+        Identifier::from(0x00000000)
+    }
+}
+
+impl Display for Identifier {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        write!(
+            f,
+            "0x{:x}{:x}{:x}{:x}",
+            self.bytes[0], self.bytes[1], self.bytes[2], self.bytes[3]
+        )
+    }
+}
+
+impl LowerHex for Identifier {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        write!(
+            f,
+            "{:x}{:x}{:x}{:x}",
+            self.bytes[0], self.bytes[1], self.bytes[2], self.bytes[3]
+        )
+    }
+}
+
+impl From<&[u8]> for Identifier {
+    fn from(value: &[u8]) -> Self {
+        let mut bytes = [0_u8; 4];
+        bytes[..4].copy_from_slice(value[..4].as_ref());
+        Identifier {
+            bytes
+        }
+    }
+}
+
+impl From<Vec<u8>> for Identifier {
+    fn from(value: Vec<u8>) -> Self {
+        Identifier::from(value.as_slice())
+    }
+}
+
+impl From<u32> for Identifier {
+    fn from(value: u32) -> Self {
+        Identifier {
+            bytes: [
+                (value >> 24) as u8,
+                (value >> 16) as u8,
+                (value >> 8) as u8,
+                (value >> 0) as u8,
+            ],
+        }
+    }
+}
+
+impl Into<u32> for Identifier {
+    fn into(self) -> u32 {
+        u32::from_be_bytes(self.bytes)
+    }
+}