Cleanup unnecessary pointers

campaigns.go

@@ -180,7 +180,7 @@ func handlePreviewCampaign(c echo.Context) error {
 	}
 
 	// Render the message body.
-	m := app.manager.NewMessage(camp, &sub)
+	m := app.manager.NewMessage(camp, sub)
 	if err := m.Render(); err != nil {
 		app.log.Printf("error rendering message: %v", err)
 		return echo.NewHTTPError(http.StatusBadRequest,
@@ -538,7 +538,7 @@ func handleTestCampaign(c echo.Context) error {
 	// Send the test messages.
 	for _, s := range subs {
 		sub := s
-		if err := sendTestMessage(&sub, &camp, app); err != nil {
+		if err := sendTestMessage(sub, &camp, app); err != nil {
 			return echo.NewHTTPError(http.StatusBadRequest,
 				fmt.Sprintf("Error sending test: %v", err))
 		}
@@ -548,7 +548,7 @@ func handleTestCampaign(c echo.Context) error {
 }
 
 // sendTestMessage takes a campaign and a subsriber and sends out a sample campaign message.
-func sendTestMessage(sub *models.Subscriber, camp *models.Campaign, app *App) error {
+func sendTestMessage(sub models.Subscriber, camp *models.Campaign, app *App) error {
 	if err := camp.CompileTemplate(app.manager.TemplateFuncs(camp)); err != nil {
 		app.log.Printf("error compiling template: %v", err)
 		return fmt.Errorf("Error compiling template: %v", err)

internal/manager/manager.go

@@ -27,7 +27,7 @@ const (
 // that provides subscriber and campaign records.
 type DataSource interface {
 	NextCampaigns(excludeIDs []int64) ([]*models.Campaign, error)
-	NextSubscribers(campID, limit int) ([]*models.Subscriber, error)
+	NextSubscribers(campID, limit int) ([]models.Subscriber, error)
 	GetCampaign(campID int) (*models.Campaign, error)
 	UpdateCampaignStatus(campID int, status string) error
 	CreateLink(url string) (string, error)
@@ -52,7 +52,7 @@ type Manager struct {
 	linksMutex sync.RWMutex
 
 	subFetchQueue  chan *models.Campaign
-	msgQueue       chan *Message
+	msgQueue       chan Message
 	msgErrorQueue  chan msgError
 	msgErrorCounts map[int]int
 }
@@ -60,7 +60,7 @@ type Manager struct {
 // Message represents an active subscriber that's being processed.
 type Message struct {
 	Campaign   *models.Campaign
-	Subscriber *models.Subscriber
+	Subscriber models.Subscriber
 	Body       []byte
 
 	from     string
@@ -96,7 +96,7 @@ func New(cfg Config, src DataSource, notifCB models.AdminNotifCallback, l *log.L
 		camps:          make(map[int]*models.Campaign),
 		links:          make(map[string]string),
 		subFetchQueue:  make(chan *models.Campaign, cfg.Concurrency),
-		msgQueue:       make(chan *Message, cfg.Concurrency),
+		msgQueue:       make(chan Message, cfg.Concurrency),
 		msgErrorQueue:  make(chan msgError, cfg.MaxSendErrors),
 		msgErrorCounts: make(map[int]int),
 	}
@@ -104,8 +104,8 @@ func New(cfg Config, src DataSource, notifCB models.AdminNotifCallback, l *log.L
 
 // NewMessage creates and returns a Message that is made available
 // to message templates while they're compiled.
-func (m *Manager) NewMessage(c *models.Campaign, s *models.Subscriber) *Message {
-	return &Message{
+func (m *Manager) NewMessage(c *models.Campaign, s models.Subscriber) Message {
+	return Message{
 		Campaign:   c,
 		Subscriber: s,
 

manager_db.go

@@ -29,8 +29,8 @@ func (r *runnerDB) NextCampaigns(excludeIDs []int64) ([]*models.Campaign, error)
 // Since batches are processed sequentially, the retrieval is ordered by ID,
 // and every batch takes the last ID of the last batch and fetches the next
 // batch above that.
-func (r *runnerDB) NextSubscribers(campID, limit int) ([]*models.Subscriber, error) {
-	var out []*models.Subscriber
+func (r *runnerDB) NextSubscribers(campID, limit int) ([]models.Subscriber, error) {
+	var out []models.Subscriber
 	err := r.queries.NextCampaignSubscribers.Select(&out, campID, limit)
 	return out, err
 }

templates.go

@@ -114,7 +114,7 @@ func handlePreviewTemplate(c echo.Context) error {
 	}
 
 	// Render the message body.
-	m := app.manager.NewMessage(&camp, &dummySubscriber)
+	m := app.manager.NewMessage(&camp, dummySubscriber)
 	if err := m.Render(); err != nil {
 		return echo.NewHTTPError(http.StatusBadRequest,
 			fmt.Sprintf("Error rendering message: %v", err))