mc root source folder cleanup

mc/data/protocol_version.go

@@ -0,0 +1,65 @@
+package data
+
+//   {
+//    "minecraftVersion": "1.21.10-rc1",
+//    "version": 1073742098,
+//    "dataVersion": 4555,
+//    "usesNetty": true,
+//    "majorVersion": "1.21",
+//    "releaseType": "snapshot"
+//  },
+
+type VersionInfo struct {
+	MinecraftVersion string
+	Version          int32
+	DataVersion      int32
+	UsesNetty        bool
+	MajorVersion     string
+	ReleaseType      string
+}
+
+var ProtocolVersions []VersionInfo
+
+func LookUpVersionByName(name string) (ret VersionInfo, err error) {
+	for _, v := range ProtocolVersions {
+		if v.MinecraftVersion == name {
+			ret = v
+			return
+		}
+	}
+	err = UnknownMinecraftVersionError
+	return
+}
+
+func LookUpVersionByProtocolVersion(version int32) (ret VersionInfo, err error) {
+	for _, v := range ProtocolVersions {
+		if v.Version == version {
+			ret = v
+			return
+		}
+	}
+	err = UnknownMinecraftVersionError
+	return
+}
+
+func LookUpVersionByDataVersion(version int32) (ret VersionInfo, err error) {
+	for _, v := range ProtocolVersions {
+		if v.DataVersion == version {
+			ret = v
+			return
+		}
+	}
+	err = UnknownMinecraftVersionError
+	return
+}
+
+// MustLookupProtocolVersion panics if the version is not found only intended for testing code.
+func MustLookupProtocolVersion(version string) int32 {
+	v, err := LookUpVersionByName(version)
+	must(err)
+	return v.Version
+}
+
+func init() {
+	must(LoadJson("minecraft-data/pc/common/protocolVersions.json", &ProtocolVersions))
+}