refactor php7

internal/version/version.go

@@ -0,0 +1,61 @@
+package version
+
+import (
+	"errors"
+	"strconv"
+	"strings"
+)
+
+type version struct {
+	major int
+	minor int
+}
+
+func Compare(a string, b string) (int, error) {
+	first, err := parse(a)
+	if err != nil {
+		return 0, err
+	}
+
+	second, err := parse(b)
+	if err != nil {
+		return 0, err
+	}
+
+	if first.major < second.major {
+		return -1, nil
+	}
+
+	if first.major > second.major {
+		return 1, nil
+	}
+
+	if first.minor < second.minor {
+		return -1, nil
+	}
+
+	if first.minor > second.minor {
+		return 1, nil
+	}
+
+	return 0, nil
+}
+
+func parse(v string) (version, error) {
+	parts := strings.Split(v, ".")
+	if len(parts) != 2 {
+		return version{}, errors.New("version must contain major and minor parts")
+	}
+
+	major, err := strconv.Atoi(parts[0])
+	if err != nil {
+		return version{}, err
+	}
+
+	minor, err := strconv.Atoi(parts[1])
+	if err != nil {
+		return version{}, err
+	}
+
+	return version{major, minor}, nil
+}