goctl added

tools/goctl/api/util/case.go

@@ -0,0 +1,107 @@
+package util
+
+func IsUpperCase(r rune) bool {
+	if r >= 'A' && r <= 'Z' {
+		return true
+	}
+	return false
+}
+
+func IsLowerCase(r rune) bool {
+	if r >= 'a' && r <= 'z' {
+		return true
+	}
+	return false
+}
+
+func ToSnakeCase(s string) string {
+	out := []rune{}
+	for index, r := range s {
+		if index == 0 {
+			out = append(out, ToLowerCase(r))
+			continue
+		}
+
+		if IsUpperCase(r) && index != 0 {
+			if IsLowerCase(rune(s[index-1])) {
+				out = append(out, '_', ToLowerCase(r))
+				continue
+			}
+			if index < len(s)-1 && IsLowerCase(rune(s[index+1])) {
+				out = append(out, '_', ToLowerCase(r))
+				continue
+			}
+			out = append(out, ToLowerCase(r))
+			continue
+		}
+		out = append(out, r)
+	}
+	return string(out)
+}
+
+func ToCamelCase(s string) string {
+	s = ToLower(s)
+	out := []rune{}
+	for index, r := range s {
+		if r == '_' {
+			continue
+		}
+		if index == 0 {
+			out = append(out, ToUpperCase(r))
+			continue
+		}
+
+		if index > 0 && s[index-1] == '_' {
+			out = append(out, ToUpperCase(r))
+			continue
+		}
+
+		out = append(out, r)
+	}
+	return string(out)
+}
+
+func ToLowerCase(r rune) rune {
+	dx := 'A' - 'a'
+	if IsUpperCase(r) {
+		return r - dx
+	}
+	return r
+}
+func ToUpperCase(r rune) rune {
+	dx := 'A' - 'a'
+	if IsLowerCase(r) {
+		return r + dx
+	}
+	return r
+}
+
+func ToLower(s string) string {
+	out := []rune{}
+	for _, r := range s {
+		out = append(out, ToLowerCase(r))
+	}
+	return string(out)
+}
+
+func ToUpper(s string) string {
+	out := []rune{}
+	for _, r := range s {
+		out = append(out, ToUpperCase(r))
+	}
+	return string(out)
+}
+
+func LowerFirst(s string) string {
+	if len(s) == 0 {
+		return s
+	}
+	return ToLower(s[:1]) + s[1:]
+}
+
+func UpperFirst(s string) string {
+	if len(s) == 0 {
+		return s
+	}
+	return ToUpper(s[:1]) + s[1:]
+}