another style pass

database/conference.go

@@ -1115,9 +1115,9 @@ func AmListConferences(ctx context.Context, cid int32, showHidden bool) ([]*Conf
 	}
 	rc := make([]*ConferenceSummary, 0)
 	for rs.Next() {
-		var cs ConferenceSummary
+		cs := new(ConferenceSummary)
 		if err = rs.Scan(&(cs.ConfId), &(cs.Name), &(cs.LastUpdate), &(cs.Description), &(cs.Sequence), &(cs.Hidden)); err == nil {
-			rc = append(rc, &cs)
+			rc = append(rc, cs)
 		} else {
 			return nil, err
 		}

database/ipban.go

@@ -67,7 +67,7 @@ type sweepentry struct {
 
 // banSweeper is a goroutine that sweeps the banned IP address cache, looking for entries that have expired
 // and kicking them out so the database can be rechecked.
-func banSweeper(done chan bool, ended chan bool, resetMe chan bool, input chan *sweepentry) {
+func banSweeper(ctx context.Context, done chan bool, resetMe chan bool, input chan *sweepentry) {
 	expireTab := make([]*sweepentry, 0) // table of expiring entries
 	running := true
 	var topEntry *sweepentry = nil   // always points to the top of expireTab
@@ -76,7 +76,7 @@ func banSweeper(done chan bool, ended chan bool, resetMe chan bool, input chan *
 		if checkTimer == nil {
 			// "timer idle" mode
 			select {
-			case <-done:
+			case <-ctx.Done():
 				running = false
 			case <-resetMe:
 				// this is bupkis, because we're resetting nothing
@@ -91,7 +91,7 @@ func banSweeper(done chan bool, ended chan bool, resetMe chan bool, input chan *
 		} else {
 			// "timer active" mode
 			select {
-			case <-done:
+			case <-ctx.Done():
 				running = false
 			case <-resetMe:
 				// clear out everything on a reset signal
@@ -129,7 +129,7 @@ func banSweeper(done chan bool, ended chan bool, resetMe chan bool, input chan *
 			}
 		}
 	}
-	ended <- true // signal that we're done
+	done <- true // signal that we're done
 }
 
 // banSweeperReset tells the ban sweeper to clear itself.
@@ -140,14 +140,14 @@ var banSweeperInput chan *sweepentry
 
 // setupIPBanSweep sets up the IP ban sweeper routine, and returns a function that tears it down.
 func setupIPBanSweep() func() {
+	ctx, cancel := context.WithCancel(context.Background())
 	banSweeperReset = make(chan bool)
 	banSweeperInput = make(chan *sweepentry, config.GlobalConfig.Tuning.Queues.IPBans)
 	done := make(chan bool)
-	ended := make(chan bool)
-	go banSweeper(done, ended, banSweeperReset, banSweeperInput)
+	go banSweeper(ctx, done, banSweeperReset, banSweeperInput)
 	return func() {
-		done <- true
-		<-ended
+		cancel()
+		<-done
 	}
 }
 
@@ -157,14 +157,10 @@ func nukeIPBanCache(bad, good bool) {
 	defer banMutex.Unlock()
 	if bad {
 		banSweeperReset <- true // send the reset signal to the sweeper
-		for k := range knownBans {
-			delete(knownBans, k)
-		}
+		clear(knownBans)
 	}
 	if good {
-		for k := range knownGood {
-			delete(knownGood, k)
-		}
+		clear(knownGood)
 	}
 }
 

database/topic.go

@@ -199,9 +199,9 @@ type TopicBozo struct {
 }
 
 // GetBozos returns all filtered users for a given user on the topic.
-func (t *Topic) GetBozos(ctx context.Context, u *User) ([]TopicBozo, error) {
+func (t *Topic) GetBozos(ctx context.Context, u *User) ([]*TopicBozo, error) {
 	if u.IsAnon {
-		return make([]TopicBozo, 0), nil
+		return make([]*TopicBozo, 0), nil
 	}
 	rs, err := amdb.QueryContext(ctx, `SELECT b.bozo_uid, u.username, c.given_name, c.family_name
 		FROM topicbozo b, users u, contacts c WHERE b.topicid = ? AND b.uid = ? AND b.bozo_uid = u.uid AND u.contactid = c.contactid
@@ -209,9 +209,9 @@ func (t *Topic) GetBozos(ctx context.Context, u *User) ([]TopicBozo, error) {
 	if err != nil {
 		return nil, err
 	}
-	rc := make([]TopicBozo, 0)
+	rc := make([]*TopicBozo, 0)
 	for rs.Next() {
-		var tb TopicBozo
+		tb := new(TopicBozo)
 		err = rs.Scan(&(tb.Uid), &(tb.Username), &(tb.GivenName), &(tb.FamilyName))
 		if err != nil {
 			return nil, err
@@ -279,7 +279,7 @@ func (t *Topic) GetSubscribers(ctx context.Context) ([]int32, error) {
  *     List of ActivityReport objects detailing the topic activity.
  *     Standard Go error status.
  */
-func (t *Topic) GetActivity(ctx context.Context, reportType int) ([]ActivityReport, error) {
+func (t *Topic) GetActivity(ctx context.Context, reportType int) ([]*ActivityReport, error) {
 	var myfield string
 	switch reportType {
 	case ActivityReportPosters:
@@ -295,9 +295,9 @@ func (t *Topic) GetActivity(ctx context.Context, reportType int) ([]ActivityRepo
 	if err != nil {
 		return nil, err
 	}
-	rc := make([]ActivityReport, 0)
+	rc := make([]*ActivityReport, 0)
 	for rs.Next() {
-		var cur ActivityReport
+		cur := new(ActivityReport)
 		err = rs.Scan(&(cur.Uid), &(cur.Username), &(cur.LastRead), &(cur.LastPost))
 		if err != nil {
 			return nil, err
@@ -698,12 +698,12 @@ func AmListTopics(ctx context.Context, confid int32, uid int32, viewOption int,
 	}
 	rc := make([]*TopicSummary, 0)
 	for rs.Next() {
-		var rec TopicSummary
+		rec := new(TopicSummary)
 		if err = rs.Scan(&rec.TopicID, &rec.Number, &rec.Name, &rec.Unread, &rec.Total, &rec.LastUpdate, &rec.Frozen,
 			&rec.Archived, &rec.Subscribed, &rec.Hidden, &rec.Sticky, &rec.NewFlag); err != nil {
 			log.Errorf("AmListTopics scan error: %v", err)
 		} else {
-			rc = append(rc, &rec)
+			rc = append(rc, rec)
 		}
 	}
 	return rc, nil

email/message.go

@@ -154,13 +154,9 @@ func recycleMessages(messages chan *amMessage, done chan bool) {
 		m.bcc = make([]string, 0)
 		m.subject = ""
 		m.text = ""
-		for k := range m.headers {
-			delete(m.headers, k)
-		}
+		clear(m.headers)
 		m.template = ""
-		for k := range m.vars {
-			delete(m.vars, k)
-		}
+		clear(m.vars)
 		freeMessages.Put(m)
 	}
 	done <- true

email/sender.go

@@ -90,11 +90,8 @@ func formatMessage(ctx context.Context, m *amMessage) ([]byte, error) {
 			hdrs[fmt.Sprintf("X-Disclaimer-%d", i+1)] = v
 		}
 
-		// Sort the header keys tro make for a better presentation.
-		keys := make([]string, 0, len(hdrs))
-		for k := range hdrs {
-			keys = append(keys, k)
-		}
+		// Sort the header keys to make for a better presentation.
+		keys := slices.Collect(maps.Keys(hdrs))
 		slices.Sort(keys)
 
 		// Build the actual message.

htmlcheck/checker.go

@@ -1071,12 +1071,8 @@ func (ht *htmlCheckerImpl) Reset() {
 	ht.outputBuffer.Reset()
 	ht.tempBuffer.Reset()
 	ht.tagStack.Clear()
-	for u := range ht.externalReferences {
-		delete(ht.externalReferences, u)
-	}
-	for k := range ht.internalReferences {
-		delete(ht.internalReferences, k)
-	}
+	clear(ht.externalReferences)
+	clear(ht.internalReferences)
 	for _, c := range ht.counters {
 		c.Reset()
 	}

top.go

@@ -366,10 +366,7 @@ func ManageSideboxes(ctxt ui.AmContext) (string, any) {
 	ctxt.VarMap().Set("sideboxes", disp)
 
 	// Create the list of available sideboxes to add.
-	addList := make([]*DisplaySidebox, 0, len(avail))
-	for _, v := range avail {
-		addList = append(addList, v)
-	}
+	addList := slices.Collect(maps.Values(avail))
 	if len(addList) > 0 {
 		slices.SortFunc(addList, func(a, b *DisplaySidebox) int {
 			return strings.Compare(strings.ToLower(a.Title), strings.ToLower(b.Title))

ui/amsession.go

@@ -192,9 +192,7 @@ func (sess *amSession) Set(key, value any) {
 func (sess *amSession) Erase() {
 	sess.mutex.Lock()
 	defer sess.mutex.Unlock()
-	for k := range sess.values {
-		delete(sess.values, k)
-	}
+	clear(sess.values)
 }
 
 // Uid returns the current user ID associated with this session.