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