added file notifier type

config.tmpl

@@ -32,6 +32,9 @@ notifiers:
     user: "<user>"
     password: "<password>"
     to: "to@email.com"
+  File:
+    type: "file"
+    path: /config/notifications.log
 database:
   dsn: "/config/watch.db" # for docker usage
   prune: "@every 1h"

main.go

@@ -211,6 +211,12 @@ func (web *Web) initNotifiers() {
 				success = notifier.Open(notifierPath)
 				break
 			}
+		case "file":
+			{
+				notifier = &notifiers.FileNotifier{}
+				success = notifier.Open(notifierPath)
+				break
+			}
 		default:
 			{
 				log.Println("Did not recognize notifier type:", notifierType)

notifiers/file.go

@@ -0,0 +1,50 @@
+package notifiers
+
+import (
+	"fmt"
+	"log"
+	"os"
+
+	"github.com/spf13/viper"
+)
+
+type FileNotifier struct {
+	Path string
+}
+
+func (file *FileNotifier) Open(configPath string) bool {
+	pathPath := fmt.Sprintf("%s.path", configPath)
+	if !viper.IsSet(pathPath) {
+		log.Println("Need 'path' for FileNotifier")
+		return false
+	}
+	file.Path = viper.GetString(pathPath)
+
+	f, err := os.OpenFile(file.Path, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0666)
+	if err != nil {
+		log.Println("Could not open:", file.Path)
+		return false
+	}
+	f.Close()
+	log.Println("File notifier path: ", file.Path)
+	return true
+}
+
+func (file *FileNotifier) Message(message string) bool {
+	f, err := os.OpenFile(file.Path, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0666)
+	if err != nil {
+		log.Println("Could not open:", file.Path)
+		return false
+	}
+	defer f.Close()
+	_, err = f.WriteString(message + "\n")
+	if err != nil {
+		log.Println("Could not write notification to:", file.Path)
+		return false
+	}
+	return true
+}
+
+func (file *FileNotifier) Close() bool {
+	return true
+}