Implement new protocol version registry

src/main/java/us/myles/ViaVersion/api/protocol/ProtocolPipeline.java

@@ -82,11 +82,11 @@ public class ProtocolPipeline extends Protocol {
             String packet = "UNKNOWN";
 
             // For 1.8/1.9 server version, eventually we'll probably get an API for this...
-            if (ProtocolRegistry.SERVER_PROTOCOL >= ProtocolVersion.V1_8 &&
-                    ProtocolRegistry.SERVER_PROTOCOL <= ProtocolVersion.V1_9_2) {
+            if (ProtocolRegistry.SERVER_PROTOCOL >= ProtocolVersion.v1_8.getId() &&
+                    ProtocolRegistry.SERVER_PROTOCOL <= ProtocolVersion.v1_9_2.getId()) {
 
                 PacketType type;
-                if (ProtocolRegistry.SERVER_PROTOCOL == ProtocolVersion.V1_8) {
+                if (ProtocolRegistry.SERVER_PROTOCOL == ProtocolVersion.v1_8.getId()) {
                     if (direction == Direction.INCOMING) {
                         type = PacketType.findNewPacket(state, direction, originalID);
                     } else {

src/main/java/us/myles/ViaVersion/api/protocol/ProtocolRegistry.java

@@ -14,8 +14,8 @@ public class ProtocolRegistry {
 
     static {
         // Register built in protocols
-        registerProtocol(new Protocol1_9TO1_8(), Collections.singletonList(ProtocolVersion.V1_9), ProtocolVersion.V1_8);
-        registerProtocol(new Protocol1_9_1TO1_9(), Arrays.asList(ProtocolVersion.V1_9_1, ProtocolVersion.V1_9_2), ProtocolVersion.V1_9);
+        registerProtocol(new Protocol1_9TO1_8(), Collections.singletonList(ProtocolVersion.v1_9.getId()), ProtocolVersion.v1_8.getId());
+        registerProtocol(new Protocol1_9_1TO1_9(), Arrays.asList(ProtocolVersion.v1_9_1.getId(), ProtocolVersion.v1_9_2.getId()), ProtocolVersion.v1_9.getId());
     }
 
     /**

src/main/java/us/myles/ViaVersion/api/protocol/ProtocolVersion.java

@@ -1,13 +1,46 @@
 package us.myles.ViaVersion.api.protocol;
 
+import lombok.Data;
+import lombok.NonNull;
+
+import java.util.*;
+
+@Data
 public class ProtocolVersion {
-    /* Defined protocol constants */
-    public static final int V1_7_1 = 4;
-    public static final int V1_7_6 = 5;
+    private static final Map<Integer, ProtocolVersion> versions = new HashMap<>();
 
-    public static final int V1_8 = 47;
+    public static final ProtocolVersion v1_7_1;
+    public static final ProtocolVersion v1_7_6;
+    public static final ProtocolVersion v1_8;
+    public static final ProtocolVersion v1_9;
+    public static final ProtocolVersion v1_9_1;
+    public static final ProtocolVersion v1_9_2;
 
-    public static final int V1_9 = 107;
-    public static final int V1_9_1 = 108; // used for 1.9.1
-    public static final int V1_9_2 = 109;
+    private final int id;
+    private final String name;
+
+    static {
+        register(v1_7_1 = new ProtocolVersion(4, "1.7-1.7.5"));
+        register(v1_7_6 = new ProtocolVersion(5, "1.7.6-1.7.10"));
+        register(v1_8 = new ProtocolVersion(4, "1.8.x"));
+        register(v1_9 = new ProtocolVersion(107, "1.9"));
+        register(v1_9_1 = new ProtocolVersion(108, "1.9.1"));
+        register(v1_9_2 = new ProtocolVersion(109, "1.9.2"));
+    }
+
+    public static void register(@NonNull ProtocolVersion protocol) {
+        versions.put(protocol.getId(), protocol);
+    }
+
+    public static boolean isRegistered(int id) {
+        return versions.containsKey(id);
+    }
+
+    public static ProtocolVersion getProtocol(int id) {
+        return versions.get(id);
+    }
+
+    public static List<ProtocolVersion> getProtocols() {
+        return Collections.unmodifiableList(new ArrayList<ProtocolVersion>(versions.values()));
+    }
 }

src/main/java/us/myles/ViaVersion/boss/ViaBossBar.java

@@ -154,7 +154,7 @@ public class ViaBossBar implements BossBar {
     }
 
     private void sendPacket(UUID uuid, ByteBuf buf) {
-        if (!ViaVersion.getInstance().isPorted(uuid) || !(ViaVersion.getInstance().getPlayerVersion(uuid) >= ProtocolVersion.V1_9)) {
+        if (!ViaVersion.getInstance().isPorted(uuid) || !(ViaVersion.getInstance().getPlayerVersion(uuid) >= ProtocolVersion.v1_9.getId())) {
             players.remove(uuid);
             return;
         }

src/main/java/us/myles/ViaVersion/commands/defaultsubs/ListSubCmd.java

@@ -5,6 +5,7 @@ import org.bukkit.command.CommandSender;
 import org.bukkit.entity.Player;
 import us.myles.ViaVersion.api.ViaVersion;
 import us.myles.ViaVersion.api.command.ViaSubCommand;
+import us.myles.ViaVersion.api.protocol.ProtocolVersion;
 
 import java.util.*;
 
@@ -38,7 +39,7 @@ public class ListSubCmd extends ViaSubCommand {
         Map<Integer, Set<String>> sorted = new TreeMap<>(playerVersions);
 
         for (Map.Entry<Integer, Set<String>> entry : sorted.entrySet())
-            sender.sendMessage(String.format(color("&8[&6%s&8]: &b%s"), entry.getKey(), entry.getValue())); //TODO: Make versions like [1.8,1.9,1.9.1,1.9.2,etc] instead of protocol id
+            sender.sendMessage(String.format(color("&8[&6%s&8]: &b%s"), ProtocolVersion.getProtocol(entry.getKey()).getName(), entry.getValue()));
 
         sorted.clear();
         return true;