From 53e2e1f48c1c8b930334cb6444ad140e4f59615f Mon Sep 17 00:00:00 2001
From: Samuel Lorch <sam@soontm.de>
Date: Sun, 2 Apr 2023 02:44:21 +0200
Subject: [PATCH] Write Config Changes to Disk

---
 internal/config/apply.go       | 11 +++++++++++
 internal/config/discard.go     | 10 ++++++++++
 internal/config/save.go        | 23 +++++++++++++++++++++++
 internal/config/transaction.go |  5 +++++
 4 files changed, 49 insertions(+)
 create mode 100644 internal/config/save.go

diff --git a/internal/config/apply.go b/internal/config/apply.go
index fa2f81e..6e49265 100644
--- a/internal/config/apply.go
+++ b/internal/config/apply.go
@@ -2,6 +2,7 @@ package config
 
 import (
 	"fmt"
+	"os"
 
 	"golang.org/x/exp/slog"
 	"nfsense.net/nfsense/internal/definitions"
@@ -23,6 +24,16 @@ func (m *ConfigManager) ApplyPendingChanges() error {
 			return err
 		}
 	}
+	m.currentConfig = m.pendingConfig.Clone()
+
+	err := m.saveConfig(m.currentConfigFilePath, m.pendingConfig)
+	if err != nil {
+		return fmt.Errorf("Save Current Config: %w", err)
+	}
+	err = os.Remove(m.pendingConfigFilePath)
+	if err != nil {
+		return fmt.Errorf("Delete Pending Config: %w", err)
+	}
 	return nil
 }
 
diff --git a/internal/config/discard.go b/internal/config/discard.go
index 2d4f230..f4163ae 100644
--- a/internal/config/discard.go
+++ b/internal/config/discard.go
@@ -1,6 +1,16 @@
 package config
 
+import (
+	"errors"
+	"os"
+)
+
 func (m *ConfigManager) DiscardPendingConfig() error {
 	m.pendingConfig = m.currentConfig.Clone()
+
+	err := os.Remove(m.pendingConfigFilePath)
+	if !errors.Is(err, os.ErrNotExist) {
+		return err
+	}
 	return nil
 }
diff --git a/internal/config/save.go b/internal/config/save.go
new file mode 100644
index 0000000..2e526c0
--- /dev/null
+++ b/internal/config/save.go
@@ -0,0 +1,23 @@
+package config
+
+import (
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+
+	"nfsense.net/nfsense/internal/definitions"
+)
+
+func (m *ConfigManager) saveConfig(path string, conf *definitions.Config) error {
+	data, err := json.MarshalIndent(conf, "", "	")
+	if err != nil {
+		return fmt.Errorf("Marshal Config: %w", err)
+	}
+
+	err = ioutil.WriteFile(path, data, 0644)
+	if err != nil {
+		return fmt.Errorf("Write Config: %w", err)
+	}
+
+	return nil
+}
diff --git a/internal/config/transaction.go b/internal/config/transaction.go
index 9d3e2eb..f9c8fdb 100644
--- a/internal/config/transaction.go
+++ b/internal/config/transaction.go
@@ -39,6 +39,11 @@ func (t *ConfigTransaction) Commit() error {
 		return fmt.Errorf("validating Config before Apply: %w", err)
 	}
 
+	err = t.configManager.saveConfig(t.configManager.pendingConfigFilePath, t.changes)
+	if err != nil {
+		return fmt.Errorf("Save Current Config: %w", err)
+	}
+
 	t.configManager.pendingConfig = t.changes.Clone()
 
 	return nil