Fix duplicating emotes with /reloademotes

Don't reload emotes directly into the global common.Emotes variable.
Instead, load them into a new variable and write that to common.Emotes
after the search for new emotes completes.  Emotes should no longer
duplicate for each run of `/reloademotes`.

Also tweaked `/addemotes` to automatically reload emotes if nothing went
wrong downloading a new set.

chatcommands.go

@@ -438,26 +438,7 @@ var commands = &CommandControl{
 		common.CNReloadEmotes.String(): Command{
 			HelpText: "Reload the emotes on the server.",
 			Function: func(cl *Client, args []string) (string, error) {
-				go func() {
-					cl.SendServerMessage("Reloading emotes")
-					err := loadEmotes()
-					if err != nil {
-						common.LogErrorf("Unbale to reload emotes: %s\n", err)
-						//return "", err
-
-						cl.SendChatData(common.NewChatMessage("", "",
-							err.Error(),
-							common.CmdlUser, common.MsgCommandResponse))
-						return
-					}
-
-					cl.belongsTo.AddChatMsg(common.NewChatHiddenMessage(common.CdEmote, common.Emotes))
-					cl.belongsTo.AddModNotice(cl.name + " has reloaded emotes")
-
-					num := len(common.Emotes)
-					common.LogInfof("Loaded %d emotes\n", num)
-					cl.belongsTo.AddModNotice(fmt.Sprintf("%s reloaded %d emotes.", cl.name, num))
-				}()
+				go commandReloadEmotes(cl)
 				return "Reloading emotes...", nil
 			},
 		},
@@ -558,6 +539,8 @@ var commands = &CommandControl{
 					}
 
 					cl.belongsTo.AddModNotice(cl.name + " has added emotes from the following channels: " + strings.Join(args, ", "))
+
+					commandReloadEmotes(cl)
 				}()
 				return "Emote download initiated for the following channels: " + strings.Join(args, ", "), nil
 			},
@@ -633,3 +616,24 @@ func getHelp(lvl common.CommandLevel) map[string]string {
 	}
 	return helptext
 }
+
+func commandReloadEmotes(cl *Client) {
+	cl.SendServerMessage("Reloading emotes")
+	err := loadEmotes()
+	if err != nil {
+		common.LogErrorf("Unbale to reload emotes: %s\n", err)
+		//return "", err
+
+		cl.SendChatData(common.NewChatMessage("", "",
+			err.Error(),
+			common.CmdlUser, common.MsgCommandResponse))
+		return
+	}
+
+	cl.belongsTo.AddChatMsg(common.NewChatHiddenMessage(common.CdEmote, common.Emotes))
+	cl.belongsTo.AddModNotice(cl.name + " has reloaded emotes")
+
+	num := len(common.Emotes)
+	common.LogInfof("Loaded %d emotes\n", num)
+	cl.belongsTo.AddModNotice(fmt.Sprintf("%s reloaded %d emotes.", cl.name, num))
+}

common/emotes.go

@@ -14,10 +14,14 @@ var Emotes EmotesMap
 var reStripStatic = regexp.MustCompile(`^(\\|/)?static`)
 
 func init() {
-	Emotes = map[string]string{}
+	Emotes = NewEmotesMap()
 }
 
-func (em EmotesMap) Add(fullpath string) {
+func NewEmotesMap() EmotesMap {
+	return map[string]string{}
+}
+
+func (em EmotesMap) Add(fullpath string) EmotesMap {
 	fullpath = reStripStatic.ReplaceAllLiteralString(fullpath, "")
 
 	base := filepath.Base(fullpath)
@@ -35,8 +39,9 @@ func (em EmotesMap) Add(fullpath string) {
 		code = fmt.Sprintf("%s-%d", code, num)
 	}
 
-	Emotes[code] = fullpath
-	fmt.Printf("Added emote %s at path %q\n", code, fullpath)
+	em[code] = fullpath
+	//fmt.Printf("Added emote %s at path %q\n", code, fullpath)
+	return em
 }
 
 func EmoteToHtml(file, title string) string {

emotes.go

@@ -29,18 +29,20 @@ type EmoteInfo struct {
 
 func loadEmotes() error {
 	//fmt.Println(processEmoteDir(emoteDir))
-	err := processEmoteDir(emoteDir)
+	newEmotes, err := processEmoteDir(emoteDir)
 	if err != nil {
 		return err
 	}
 
+	common.Emotes = newEmotes
+
 	return nil
 }
 
-func processEmoteDir(path string) error {
+func processEmoteDir(path string) (common.EmotesMap, error) {
 	dirInfo, err := ioutil.ReadDir(path)
 	if err != nil {
-		return errors.Wrap(err, "could not open emoteDir:")
+		return nil, errors.Wrap(err, "could not open emoteDir:")
 	}
 
 	subDirs := []string{}
@@ -53,54 +55,62 @@ func processEmoteDir(path string) error {
 		}
 	}
 
+	em := common.NewEmotesMap()
 	// Find top level emotes
-	err = findEmotes(path)
+	em, err = findEmotes(path, em)
 	if err != nil {
-		return errors.Wrap(err, "could not findEmotes() in top level directory:")
+		return nil, errors.Wrap(err, "could not findEmotes() in top level directory:")
 	}
 
 	// Get second level subdirs (eg, "twitch", "zorchenhimer", etc)
 	for _, dir := range subDirs {
 		subd, err := ioutil.ReadDir(filepath.Join(path, dir))
 		if err != nil {
+			fmt.Printf("Error reading dir %q: %v\n", subd, err)
 			continue
 		}
 		for _, d := range subd {
 			if d.IsDir() {
 				//emotes = append(emotes, findEmotes(filepath.Join(path, dir, d.Name()))...)
-				findEmotes(filepath.Join(path, dir, d.Name()))
+				p := filepath.Join(path, dir, d.Name())
+				em, err = findEmotes(p, em)
+				if err != nil {
+					fmt.Printf("Error finding emotes in %q: %v\n", p, err)
+				}
 			}
 		}
 	}
 
-	return nil
+	fmt.Printf("processEmoteDir: %d\n", len(em))
+	return em, nil
 }
 
-func findEmotes(dir string) error {
+func findEmotes(dir string, em common.EmotesMap) (common.EmotesMap, error) {
+	//em := NewEmotesMap()
+
 	fmt.Printf("finding emotes in %q\n", dir)
 	emotePNGs, err := filepath.Glob(filepath.Join(dir, "*.png"))
 	if err != nil {
-		//return 0, fmt.Errorf("unable to glob emote directory: %s\n", err)
-		return nil
+		return em, fmt.Errorf("unable to glob emote directory: %s\n", err)
 	}
 	fmt.Printf("%d emotePNGs\n", len(emotePNGs))
 
 	emoteGIFs, err := filepath.Glob(filepath.Join(dir, "*.gif"))
 	if err != nil {
-		return errors.Wrap(err, "unable to glob emote directory:")
+		return em, errors.Wrap(err, "unable to glob emote directory:")
 	}
 	fmt.Printf("%d emoteGIFs\n", len(emoteGIFs))
 
 	for _, file := range emotePNGs {
-		common.Emotes.Add(file)
+		em = em.Add(file)
 		//emotes = append(emotes, common.Emote{FullPath: dir, Code: file})
 	}
 
 	for _, file := range emoteGIFs {
-		common.Emotes.Add(file)
+		em = em.Add(file)
 	}
 
-	return nil
+	return em, nil
 }
 
 func getEmotes(names []string) error {