Work in progress

.gitignore

@@ -1 +1,2 @@
-*.yaml
+*.yaml
+photo-bot

README.md

@@ -2,12 +2,20 @@
 
 ## Compilation
 
-```
+Fetch dependencies.
+
+```sh
 go get -u github.com/go-telegram-bot-api/telegram-bot-api
 go get -u github.com/spf13/viper
 go get -u gopkg.in/yaml.v2
 ```
 
+Compile for Raspberry PI.
+
+```sh
+GOOS=linux GOARCH=arm64 go build -o photo-bot
+```
+
 ## Create a Bot
 
 Talk to [BotFather](https://core.telegram.org/bots#6-botfather) to create your bot.
@@ -18,19 +26,71 @@ Talk to [BotFather](https://core.telegram.org/bots#6-botfather) to create your b
 
 Keep your bot token secure and safe!
 
-## Create the configuration file
+## Installation
+
+On your Raspberry PI.
 
-Create a file named `photo-bot.yaml` in the current directory.
+```sh
+mkdir -p /opt/photo-bot/bin
+mkdir -p /opt/photo-bot/etc
+mkdir -p /srv/photo-bot
+useradd -d /srv/photo-bot -s /bin/false -m -r bot
+chown bot:bot /srv/photo-bot
+```
+
+```sh
+scp photo-bot root@raspberry-pi.example.test:/opt/photo-bot/bin/
+```
+
+Create a file named `photo-bot.yaml` in `/opt/photo-bot/etc/`.
 
 ```yaml
 TelegramToken: "bot.token.here"
 TelegramDebug: true
-TargetDir: /srv/photos
+TargetDir: /srv/photo-bot
 AuthorizedUsers:
 - john
 - jane
 ```
 
+```sh
+chown bot:bot /opt/photo-bot/etc/photo-bot.yaml
+chmod 600 /opt/photo-bot/etc/photo-bot.yaml
+```
+
+Start the bot manually.
+
+```sh
+sudo -u bot /opt/photo-bot/bin/photo-bot
+```
+
+Create the startup script in `/etc/init.d/photo-bot`.
+
+```sh
+#!/bin/sh /etc/rc.common
+# photo-bot
+
+# Start late in the boot process
+START=80
+STOP=20
+
+start() {
+  cd /opt/photo-bot/etc/ && start-stop-daemon -c bot -u bot -x /opt/photo-bot/bin/photo-bot -b -S
+}
+
+stop() {
+  start-stop-daemon -c bot -u bot -x /opt/photo-bot/bin/photo-bot -b -K
+}
+```
+
+```sh
+chmod 755 /etc/init.d/photo-bot
+service photo-bot enable
+service photo-bot start
+```
+
+
+
 ## Documentation
 
 - https://core.telegram.org/bots/api

main.go

@@ -30,6 +30,7 @@ func main() {
 	viper.SetDefault("MsgNoAlbum", "No album is currently open")
 	viper.SetDefault("MsgAlbumClosed", "Album closed")
 	viper.SetDefault("MsgDoNotUnderstand", "Unknown command")
+	viper.SetDefault("MsgNoUsername", "Sorry, you need to set your username")
 
 	viper.SetConfigName("photo-bot") // name of config file (without extension)
 	viper.AddConfigPath("/etc/photo-bot/")
@@ -40,6 +41,17 @@ func main() {
 		panic(fmt.Errorf("Cannot read config file: %s\n", err))
 	}
 
+	logFile := viper.GetString("LogFile")
+	var logHandle *os.File
+	if logFile != "" {
+		logHandle, err = os.OpenFile(logFile, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0600)
+		if err != nil {
+			panic(fmt.Errorf("Cannot open log file '%s': %s\n", logFile, err))
+		}
+		defer logHandle.Close()
+		log.SetOutput(logHandle)
+	}
+
 	target_dir := viper.GetString("TargetDir")
 	if (target_dir == "") {
 		panic("No target directory provided!")
@@ -86,6 +98,7 @@ func main() {
 		username := update.Message.From.UserName
 
 		if (username == "") {
+			replyToCommandWithMessage(bot, update.Message, viper.GetString("MsgNoUsername"))
 			continue
 		}
 		if (! authorized_users[username]) {
@@ -94,7 +107,10 @@ func main() {
 			continue
 		}
 
-		updateChatDB(update.Message)
+		err := updateChatDB(update.Message)
+		if err != nil {
+			log.Printf("[%s] cannot update chat db: %s", username, err)
+		}
 
 		if text != "" {
 			if strings.HasPrefix(text, "/") {
@@ -365,12 +381,6 @@ func getFile(bot *tgbotapi.BotAPI, message *tgbotapi.Message, fileId string) (st
 	return fileId + extension, nil
 }
 
-type AlbumMetadata struct {
-	Title string `yaml:"title"`
-	Date string `yaml:"date"`
-	Folder string `yaml:"folder"`
-}
-
 func closeAlbum() error {
 	target_dir := viper.GetString("TargetDir")
 	yamlData, err := ioutil.ReadFile(target_dir + "/data/.current/meta.yaml")
@@ -378,13 +388,13 @@ func closeAlbum() error {
 		return err
 	}
 
-	var metadata AlbumMetadata
+	var metadata map[string]string = make(map[string]string)
 	err = yaml.UnmarshalStrict(yamlData, &metadata)
 	if err != nil {
 		return err
 	}
 
-	err = os.Rename(target_dir + "/data/.current/", target_dir + "/data/" + metadata.Folder)
+	err = os.Rename(target_dir + "/data/.current/", target_dir + "/data/" + metadata["folder"])
 	if err != nil {
 		return err
 	}