Add persistence for last used JID

1 files changed, 55 insertions, 0 deletions

diff --git a/persistence.go b/persistence.go
new file mode 100644
index 0000000..5199fc5
--- /dev/null
+++ b/persistence.go
@@ -0,0 +1,55 @@
+package main
+
+import (
+	"io/ioutil"
+	"os"
+	"path/filepath"
+)
+
+const (
+	RelDataPath = `/.config/limox`
+	RelJidPath  = `/last_jid.txt`
+)
+
+func setLastJid(j string) {
+	data, err := assertDatadir()
+	if err != nil {
+		return
+	}
+
+	path := filepath.Join(data, RelJidPath)
+
+	_ = ioutil.WriteFile(path, []byte(j), 0644)
+}
+
+func getLastJid() string {
+	data, err := assertDatadir()
+	if err != nil {
+		return ""
+	}
+
+	path := filepath.Join(data, RelJidPath)
+
+	content, err := ioutil.ReadFile(path)
+	if err != nil {
+		return ""
+	}
+
+	return string(content)
+}
+
+func assertDatadir() (string, error) {
+	home, err := os.UserHomeDir()
+	if err != nil {
+		return "", err
+	}
+
+	path := filepath.Join(home, RelDataPath)
+
+	err = os.MkdirAll(path, 0755)
+	if err != nil {
+		return "", err
+	}
+
+	return path, nil
+}