reply functionality

Readme.md

@@ -1,7 +1,7 @@
 drivel
 ========
 
-drivel is a Twitter command line interface for status updates, media upload and mentions.
+drivel is a Twitter command line interface for status updates, media upload, mentions and replies.
 My personal opinion is that you shouldn't be on Twitter in the first place, but
 anyway...
 
@@ -27,13 +27,21 @@ To get your last 100 mentions:
 drivel mentions
 ```
 
-To update your status with optional media upload:
+To update your status with optional media upload...
 
 
 ```
 drivel status STATUS [FILE1, FILE2, ...]
 ```
 
+...or reply to a tweet with a specific ID:
+
+
+```
+drivel reply TWEET_ID MESSAGE [FILE1, FILE2, ...]
+```
+
+
 with any number of files, as long as they are .jpg, .png, .gif or .mp4 and smaller than 5 MB each. On first use, drivel will ask you to go to [https://apps.twitter.com/app/new](https://apps.twitter.com/app/new), register a new app and create an access token. Those values will be stored in HOME/.drivel/ for later use.
 
 drivel will automatically split large status messages and multiple files into separate tweets belonging to the same thread.

drivel.go

@@ -324,11 +324,10 @@ func (d *data) uploadVideo(client *http.Client, i int) []ObjectID {
 	return uploadAll(client, []string{vid})
 }
 
-func (d *data) push(client *http.Client) {
+func (d *data) push(client *http.Client, previous ObjectID) {
 	if d == nil {
 		return
 	}
-	var previous ObjectID = ""
 	empty := false
 	i, g, v := 0, 0, 0
 	for !empty {
@@ -359,20 +358,25 @@ func (d *data) push(client *http.Client) {
 	}
 }
 
-func status(args []string) error {
+func updateStatus(args []string, previous ObjectID) {
 	d := splitArguments(args)
 	httpClient := getClient()
-	d.push(httpClient)
+	d.push(httpClient, previous)
+}
+
+func status(args []string) error {
+	updateStatus(args, "")
 	return nil
 }
 
 type Mention struct {
 	Full_text string
+	Id_str    string
 	User      MentionUser
 }
 
 func (m Mention) String() string {
-	return m.User.Name + ":\n" + m.Full_text
+	return m.User.Name + " " + "(" + m.Id_str + ")" + ":\n" + m.Full_text
 }
 
 type MentionUser struct {
@@ -393,10 +397,20 @@ func mentions(args []string) error {
 	return nil
 }
 
+func reply(args []string) error {
+	if len(args) < 2 {
+		fmt.Fprintln(os.Stderr, "Usage: drivel reply TWEET_ID MESSAGE [FILE1, FILE2, ...]")
+		os.Exit(-1)
+	}
+	updateStatus(args[1:], ObjectID(args[0]))
+	return nil
+}
+
 func main() {
 	commands := []goutil.Command{
 		goutil.NewCommand("status", status, "post a status with message and/or media"),
 		goutil.NewCommand("mentions", mentions, "get your mentions"),
+		goutil.NewCommand("reply", reply, "reply to a tweet with a specific ID"),
 	}
 	err := goutil.Execute(commands)
 	if err != nil {