add method find OsSpecifics to java versions

domain/structures.go

@@ -2,12 +2,23 @@ package domain
 
 type JavaVersion struct {
 	VersionNums `json:"version"`
-	Specifics   []struct {
+	Specifics   []JavaVersionSpecifics `json:"specifics"`
+}
+
+type JavaVersionSpecifics struct {
 	Os   string `json:"os"`
 	Arch string `json:"arch"`
 	URL  string `json:"URL"`
 	Sha1 string `json:"SHA1"`
-	} `json:"specifics"`
+}
+
+func (jv *JavaVersion) FindOs(os string, arch string) *JavaVersionSpecifics {
+	for _, s := range jv.Specifics {
+		if s.Os == os && s.Arch == arch {
+			return &s
+		}
+	}
+	return nil
 }
 
 type VersionNums struct {
@@ -32,6 +43,7 @@ type Version struct {
 	GameArgs    []Argument
 	JVMArgs     []Argument
 	Type        string      `json:"type"`
+	JavaVersion JavaVersion `json:"javaVersion"`
 }
 
 type AssetIndex struct {
@@ -45,6 +57,11 @@ type AssetIndex struct {
 // 	Rules []Rule `json:"rules"`
 // }
 
+type JavaVersionClientDistribution struct { //TODO Rename
+	Component    string `json:"component"`
+	MajorVersion int    `json:"majorVersion"`
+}
+
 type Rule struct {
 	Action RuleAct `json:"action" mapstructure:"action"`
 	// OS information. All fields are regexes.