Enhance -p/--protocol-version to accept game version string

Now you can pass `-p 1.7.10` as an alternative to `-p 5`, etc

Author: iceiix

protocol/src/protocol/versions.rs

@@ -13,49 +13,50 @@ mod v15w39c;
 mod v1_8_9;
 mod v1_7_10;
 
+// https://wiki.vg/Protocol_History
+// https://wiki.vg/Protocol_version_numbers#Versions_after_the_Netty_rewrite
+
+pub fn protocol_name_to_protocol_version(s: String) -> i32 {
+    match s.as_ref() {
+        "" => SUPPORTED_PROTOCOLS[0],
+        "1.14" => 477,
+        "19w02a" => 452,
+        "18w50a" => 451,
+        "1.13.2" => 404,
+        "1.12.2" => 340,
+        "1.11.2" => 316,
+        "1.11" => 315,
+        "1.10.2" => 210,
+        "1.9.2" => 109,
+        "1.9" => 107,
+        "15w39c" => 74,
+        "1.8.9" => 47,
+        "1.7.10" => 5,
+        _ => {
+            if let Ok(n) = s.parse::<i32>() {
+                n
+            } else {
+                panic!("Unrecognized protocol name: {}", s)
+            }
+        }
+    }
+}
+
 pub fn translate_internal_packet_id_for_version(version: i32, state: State, dir: Direction, id: i32, to_internal: bool) -> i32 {
     match version {
-        // https://wiki.vg/Protocol_History
-        // https://wiki.vg/Protocol_version_numbers#Versions_after_the_Netty_rewrite
-
         477 => v1_14::translate_internal_packet_id(state, dir, id, to_internal),
-       
-        // 19w02a
         452 => v19w02a::translate_internal_packet_id(state, dir, id, to_internal),
-
-        // 18w50a
         451 => v18w50a::translate_internal_packet_id(state, dir, id, to_internal),
-
-        // 1.13.2
         404 => v1_13_2::translate_internal_packet_id(state, dir, id, to_internal),
-
-        // 1.12.2
         340 => v1_12_2::translate_internal_packet_id(state, dir, id, to_internal),
-
-        // 1.11.2
         316 => v1_11_2::translate_internal_packet_id(state, dir, id, to_internal),
-
-        // 1.11
         315 => v1_11_2::translate_internal_packet_id(state, dir, id, to_internal),
-
-        // 1.10.2
         210 => v1_10_2::translate_internal_packet_id(state, dir, id, to_internal),
-
-        // 1.9.2
         109 => v1_9_2::translate_internal_packet_id(state, dir, id, to_internal),
-
-        // 1.9
         107 => v1_9::translate_internal_packet_id(state, dir, id, to_internal),
-
-        // 15w39a/b/c
         74 => v15w39c::translate_internal_packet_id(state, dir, id, to_internal),
-
-        // 1.8.9 - 1.8
         47 => v1_8_9::translate_internal_packet_id(state, dir, id, to_internal),
-
-        // 1.7.10 - 1.7.6
         5 => v1_7_10::translate_internal_packet_id(state, dir, id, to_internal),
-
-        _ => panic!("unsupported protocol version"),
+        _ => panic!("unsupported protocol version: {}", version),
     }
 }