rings: introduce ring-specific decoders

Signed-off-by: Alejandro Mery <amery@jpi.io>

pkg/rings/decode.go

@@ -72,3 +72,51 @@ func unsafeDecodeAddress[T ~uint | NodeID](a, b, c, d byte) (RingID, RegionID, Z
 		return k, r, 0, n
 	}
 }
+
+// DecodeRingZeroAddress attempts to extract region, zone and node identifiers
+// from a given ring 0 address.
+//
+// revive:disable:function-result-limit
+func DecodeRingZeroAddress(addr netip.Addr) (RegionID, ZoneID, NodeID, bool) {
+	// revive:enable:function-result-limit
+	k, r, z, n := DecodeAddress[NodeID](addr)
+	if k == RingZeroID {
+		return r, z, n, true
+	}
+
+	return 0, 0, 0, false
+}
+
+// DecodeRingOneAddress attempts to extract region, zone and node identifiers
+// from a given ring 1 address.
+//
+// revive:disable:function-result-limit
+func DecodeRingOneAddress(addr netip.Addr) (RegionID, ZoneID, NodeID, bool) {
+	// revive:enable:function-result-limit
+	k, r, z, n := DecodeAddress[NodeID](addr)
+	if k == RingOneID {
+		return r, z, n, true
+	}
+
+	return 0, 0, 0, false
+}
+
+// DecodeRingTwoAddress attempts to extract region and unique identifier for
+// a kubernetes service from a given ring 2 address.
+func DecodeRingTwoAddress(addr netip.Addr) (RegionID, uint, bool) {
+	k, r, _, n := DecodeAddress[uint](addr)
+	if k == RingTwoID {
+		return r, n, true
+	}
+	return 0, 0, false
+}
+
+// DecodeRingThreeAddress attempts to extract region and unique identifier for
+// a kubernetes pod from a given ring 3 address.
+func DecodeRingThreeAddress(addr netip.Addr) (RegionID, uint, bool) {
+	k, r, _, n := DecodeAddress[uint](addr)
+	if k == RingThreeID {
+		return r, n, true
+	}
+	return 0, 0, false
+}