Clean up various stuff (#508)

* various cleanups

9 files changed, 72 insertions, 50 deletions

diff --git a/bridge/api/api.go b/bridge/api/api.go
index da1f91e2..eef41a4a 100644
--- a/bridge/api/api.go
+++ b/bridge/api/api.go
@@ -110,8 +110,8 @@ func (b *Api) handleStream(c echo.Context) error {
 	c.Response().Header().Set(echo.HeaderContentType, echo.MIMEApplicationJSON)
 	c.Response().WriteHeader(http.StatusOK)
 	greet := config.Message{
-		Event:config.EVENT_API_CONNECTED,
-		Timestamp:time.Now(),
+		Event:     config.EVENT_API_CONNECTED,
+		Timestamp: time.Now(),
 	}
 	if err := json.NewEncoder(c.Response()).Encode(greet); err != nil {
 		return err
diff --git a/bridge/discord/discord.go b/bridge/discord/discord.go
index 116bf86d..0549187f 100644
--- a/bridge/discord/discord.go
+++ b/bridge/discord/discord.go
@@ -91,6 +91,7 @@ func (b *Bdiscord) Connect() error {
 	}
 	// obtaining guild members and initializing nickname mapping
 	b.Lock()
+	defer b.Unlock()
 	members, err := b.c.GuildMembers(b.guildID, "", 1000)
 	if err != nil {
 		b.Log.Error("Error obtaining guild members", err)
@@ -103,7 +104,6 @@ func (b *Bdiscord) Connect() error {
 			b.nickMemberMap[member.Nick] = member
 		}
 	}
-	b.Unlock()
 	return nil
 }
 
@@ -488,9 +488,16 @@ func (b *Bdiscord) handleUploadFile(msg *config.Message, channelID string) (stri
 	var err error
 	for _, f := range msg.Extra["file"] {
 		fi := f.(config.FileInfo)
-		files := []*discordgo.File{}
-		files = append(files, &discordgo.File{fi.Name, "", bytes.NewReader(*fi.Data)})
-		_, err = b.c.ChannelMessageSendComplex(channelID, &discordgo.MessageSend{Content: msg.Username + fi.Comment, Files: files})
+		file := discordgo.File{
+			Name:        fi.Name,
+			ContentType: "",
+			Reader:      bytes.NewReader(*fi.Data),
+		}
+		m := discordgo.MessageSend{
+			Content: msg.Username + fi.Comment,
+			Files:   []*discordgo.File{&file},
+		}
+		_, err = b.c.ChannelMessageSendComplex(channelID, &m)
 		if err != nil {
 			return "", fmt.Errorf("file upload failed: %#v", err)
 		}
diff --git a/bridge/irc/irc.go b/bridge/irc/irc.go
index cd37c0b4..c1cbdf60 100644
--- a/bridge/irc/irc.go
+++ b/bridge/irc/irc.go
@@ -106,7 +106,10 @@ func (b *Birc) Connect() error {
 	})
 
 	if b.GetBool("UseSASL") {
-		i.Config.SASL = &girc.SASLPlain{b.GetString("NickServNick"), b.GetString("NickServPassword")}
+		i.Config.SASL = &girc.SASLPlain{
+			User: b.GetString("NickServNick"),
+			Pass: b.GetString("NickServPassword"),
+		}
 	}
 
 	i.Handlers.Add(girc.RPL_WELCOME, b.handleNewConnection)
diff --git a/bridge/matrix/matrix.go b/bridge/matrix/matrix.go
index 95ba6b42..ba02d4aa 100644
--- a/bridge/matrix/matrix.go
+++ b/bridge/matrix/matrix.go
@@ -73,8 +73,11 @@ func (b *Bmatrix) Send(msg config.Message) (string, error) {
 
 	// Make a action /me of the message
 	if msg.Event == config.EVENT_USER_ACTION {
-		resp, err := b.mc.SendMessageEvent(channel, "m.room.message",
-			matrix.TextMessage{"m.emote", msg.Username + msg.Text})
+		m := matrix.TextMessage{
+			MsgType: "m.emote",
+			Body:    msg.Username + msg.Text,
+		}
+		resp, err := b.mc.SendMessageEvent(channel, "m.room.message", m)
 		if err != nil {
 			return "", err
 		}
@@ -158,7 +161,8 @@ func (b *Bmatrix) handleEvent(ev *matrix.Event) {
 
 		// Text must be a string
 		if rmsg.Text, ok = ev.Content["body"].(string); !ok {
-			b.Log.Errorf("Content[body] wasn't a %T ?", rmsg.Text)
+			b.Log.Errorf("Content[body] is not a string: %T\n%#v",
+				ev.Content["body"], ev.Content)
 			return
 		}
 
diff --git a/bridge/slack/handlers.go b/bridge/slack/handlers.go
index 1428cba2..d6894bf6 100644
--- a/bridge/slack/handlers.go
+++ b/bridge/slack/handlers.go
@@ -166,15 +166,14 @@ func (b *Bslack) handleMessageEvent(ev *slack.MessageEvent) (*config.Message, er
 	}
 
 	rmsg := config.Message{
-		Text:    ev.Text,
-		Channel: channelInfo.Name,
-		Account: b.Account,
-		ID:      "slack " + ev.Timestamp,
-		Extra:   map[string][]interface{}{},
+		Text:     ev.Text,
+		Channel:  channelInfo.Name,
+		Account:  b.Account,
+		ID:       "slack " + ev.Timestamp,
+		Extra:    map[string][]interface{}{},
 		ParentID: ev.ThreadTimestamp,
 	}
 
-
 	if b.useChannelID {
 		rmsg.Channel = "ID:" + channelInfo.ID
 	}
diff --git a/bridge/slack/helpers.go b/bridge/slack/helpers.go
index 4abe79cd..23d5816a 100644
--- a/bridge/slack/helpers.go
+++ b/bridge/slack/helpers.go
@@ -4,7 +4,6 @@ import (
 	"fmt"
 	"regexp"
 	"strings"
-	"sync"
 	"time"
 
 	"github.com/nlopes/slack"
@@ -61,22 +60,17 @@ func (b *Bslack) getChannelByID(ID string) (*slack.Channel, error) {
 
 const minimumRefreshInterval = 10 * time.Second
 
-var (
-	refreshMutex           sync.Mutex
-	refreshInProgress      bool
-	earliestChannelRefresh = time.Now()
-	earliestUserRefresh    = time.Now()
-)
-
 func (b *Bslack) populateUsers() {
-	refreshMutex.Lock()
-	if time.Now().Before(earliestUserRefresh) || refreshInProgress {
-		b.Log.Debugf("Not refreshing user list as it was done less than %d seconds ago.", int(minimumRefreshInterval.Seconds()))
-		refreshMutex.Unlock()
+	b.refreshMutex.Lock()
+	if time.Now().Before(b.earliestUserRefresh) || b.refreshInProgress {
+		b.Log.Debugf("Not refreshing user list as it was done less than %v ago.",
+			minimumRefreshInterval)
+		b.refreshMutex.Unlock()
+
 		return
 	}
-	refreshInProgress = true
-	refreshMutex.Unlock()
+	b.refreshInProgress = true
+	b.refreshMutex.Unlock()
 
 	users, err := b.sc.GetUsers()
 	if err != nil {
@@ -95,19 +89,22 @@ func (b *Bslack) populateUsers() {
 	defer b.usersMutex.Unlock()
 	b.users = newUsers
 
-	earliestUserRefresh = time.Now().Add(minimumRefreshInterval)
-	refreshInProgress = false
+	b.refreshMutex.Lock()
+	defer b.refreshMutex.Unlock()
+	b.earliestUserRefresh = time.Now().Add(minimumRefreshInterval)
+	b.refreshInProgress = false
 }
 
 func (b *Bslack) populateChannels() {
-	refreshMutex.Lock()
-	if time.Now().Before(earliestChannelRefresh) || refreshInProgress {
-		b.Log.Debugf("Not refreshing channel list as it was done less than %d seconds ago.", int(minimumRefreshInterval.Seconds()))
-		refreshMutex.Unlock()
+	b.refreshMutex.Lock()
+	if time.Now().Before(b.earliestChannelRefresh) || b.refreshInProgress {
+		b.Log.Debugf("Not refreshing channel list as it was done less than %v seconds ago.",
+			minimumRefreshInterval)
+		b.refreshMutex.Unlock()
 		return
 	}
-	refreshInProgress = true
-	refreshMutex.Unlock()
+	b.refreshInProgress = true
+	b.refreshMutex.Unlock()
 
 	newChannelsByID := map[string]*slack.Channel{}
 	newChannelsByName := map[string]*slack.Channel{}
@@ -139,8 +136,10 @@ func (b *Bslack) populateChannels() {
 	b.channelsByID = newChannelsByID
 	b.channelsByName = newChannelsByName
 
-	earliestChannelRefresh = time.Now().Add(minimumRefreshInterval)
-	refreshInProgress = false
+	b.refreshMutex.Lock()
+	defer b.refreshMutex.Unlock()
+	b.earliestChannelRefresh = time.Now().Add(minimumRefreshInterval)
+	b.refreshInProgress = false
 }
 
 var (
diff --git a/bridge/slack/slack.go b/bridge/slack/slack.go
index 924f4131..c1386a46 100644
--- a/bridge/slack/slack.go
+++ b/bridge/slack/slack.go
@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"strings"
 	"sync"
+	"time"
 
 	"github.com/42wim/matterbridge/bridge"
 	"github.com/42wim/matterbridge/bridge/config"
@@ -34,6 +35,11 @@ type Bslack struct {
 	channelsByID   map[string]*slack.Channel
 	channelsByName map[string]*slack.Channel
 	channelsMutex  sync.RWMutex
+
+	refreshInProgress      bool
+	earliestChannelRefresh time.Time
+	earliestUserRefresh    time.Time
+	refreshMutex           sync.Mutex
 }
 
 const (
@@ -68,12 +74,14 @@ func New(cfg *bridge.Config) bridge.Bridger {
 		cfg.Log.Fatalf("Could not create LRU cache for Slack bridge: %v", err)
 	}
 	b := &Bslack{
-		Config:         cfg,
-		uuid:           xid.New().String(),
-		cache:          newCache,
-		users:          map[string]*slack.User{},
-		channelsByID:   map[string]*slack.Channel{},
-		channelsByName: map[string]*slack.Channel{},
+		Config:                 cfg,
+		uuid:                   xid.New().String(),
+		cache:                  newCache,
+		users:                  map[string]*slack.User{},
+		channelsByID:           map[string]*slack.Channel{},
+		channelsByName:         map[string]*slack.Channel{},
+		earliestChannelRefresh: time.Now(),
+		earliestUserRefresh:    time.Now(),
 	}
 	return b
 }
diff --git a/bridge/telegram/telegram.go b/bridge/telegram/telegram.go
index 378f383d..93cc82f6 100644
--- a/bridge/telegram/telegram.go
+++ b/bridge/telegram/telegram.go
@@ -377,7 +377,10 @@ func (b *Btelegram) handleUploadFile(msg *config.Message, chatid int64) (string,
 	var c tgbotapi.Chattable
 	for _, f := range msg.Extra["file"] {
 		fi := f.(config.FileInfo)
-		file := tgbotapi.FileBytes{fi.Name, *fi.Data}
+		file := tgbotapi.FileBytes{
+			Name:  fi.Name,
+			Bytes: *fi.Data,
+		}
 		re := regexp.MustCompile(".(jpg|png)$")
 		if re.MatchString(fi.Name) {
 			c = tgbotapi.NewPhotoUpload(chatid, file)
diff --git a/bridge/xmpp/xmpp.go b/bridge/xmpp/xmpp.go
index 4ace2abd..4d6cc3cf 100644
--- a/bridge/xmpp/xmpp.go
+++ b/bridge/xmpp/xmpp.go
@@ -75,8 +75,6 @@ func (b *Bxmpp) JoinChannel(channel config.ChannelInfo) error {
 }
 
 func (b *Bxmpp) Send(msg config.Message) (string, error) {
-	var msgid = ""
-	var msgreplaceid = ""
 	// ignore delete messages
 	if msg.Event == config.EVENT_MSG_DELETE {
 		return "", nil
@@ -93,7 +91,8 @@ func (b *Bxmpp) Send(msg config.Message) (string, error) {
 		}
 	}
 
-	msgid = xid.New().String()
+	var msgreplaceid string
+	msgid := xid.New().String()
 	if msg.ID != "" {
 		msgid = msg.ID
 		msgreplaceid = msg.ID