From 2f4437591e9a6e2d7ce46a1a9607762bf2fd002a Mon Sep 17 00:00:00 2001
From: Stefan Haller <stefan@haller-berlin.de>
Date: Sun, 10 Mar 2024 20:59:11 +0100
Subject: Show popup message with breaking changes on startup

---
 pkg/gui/types/version_number.go | 41 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)
 create mode 100644 pkg/gui/types/version_number.go

(limited to 'pkg/gui/types/version_number.go')

diff --git a/pkg/gui/types/version_number.go b/pkg/gui/types/version_number.go
new file mode 100644
index 000000000..ae51a2722
--- /dev/null
+++ b/pkg/gui/types/version_number.go
@@ -0,0 +1,41 @@
+package types
+
+import (
+	"errors"
+	"regexp"
+	"strconv"
+)
+
+type VersionNumber struct {
+	Major, Minor, Patch int
+}
+
+func (v *VersionNumber) IsOlderThan(otherVersion *VersionNumber) bool {
+	this := v.Major*1000*1000 + v.Minor*1000 + v.Patch
+	other := otherVersion.Major*1000*1000 + otherVersion.Minor*1000 + otherVersion.Patch
+	return this < other
+}
+
+func ParseVersionNumber(versionStr string) (*VersionNumber, error) {
+	re := regexp.MustCompile(`^v?(\d+)\.(\d+)(?:\.(\d+))?$`)
+	matches := re.FindStringSubmatch(versionStr)
+	if matches == nil {
+		return nil, errors.New("unexpected version format: " + versionStr)
+	}
+
+	v := &VersionNumber{}
+	var err error
+
+	if v.Major, err = strconv.Atoi(matches[1]); err != nil {
+		return nil, err
+	}
+	if v.Minor, err = strconv.Atoi(matches[2]); err != nil {
+		return nil, err
+	}
+	if len(matches[3]) > 0 {
+		if v.Patch, err = strconv.Atoi(matches[3]); err != nil {
+			return nil, err
+		}
+	}
+	return v, nil
+}
-- 
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