func HandleCreateMessage(ctx context.Context, w http.ResponseWriter, r *http.Request) {
uid, ok := CurrentUserID(r)
if !ok {
// TODO - redirect to authentication page, but remember form content
tmpl.Render500(w, errors.New("not implemented"))
return
}
tid, err := strconv.Atoi(param(ctx, "topicid"))
if err != nil || tid < 0 {
tmpl.Render404(w, "Topic does not exist")
return
}
content := strings.TrimSpace(r.FormValue("content"))
if len(content) < 3 {
tmpl.Render400(w, "Message too short")
return
}
if len(content) > 20000 {
tmpl.Render400(w, "Message too long")
return
}
tx, err := DB(ctx).Beginx()
if err != nil {
tmpl.Render500(w, err)
return
}
defer tx.Rollback()
store := NewStore(tx)
t, err := store.TopicByID(uint(tid))
if err != nil {
if err == ErrNotFound {
tmpl.Render404(w, "Topic does not exist")
} else {
tmpl.Render500(w, err)
}
return
}
m, err := store.CreateMessage(t.TopicID, uid, content, time.Now())
if err != nil {
tmpl.Render500(w, err)
return
}
if err := tx.Commit(); err != nil {
tmpl.Render500(w, err)
return
}
murl := fmt.Sprintf(
"/t/%d/%s?page=%d#m%d",
t.TopicID, t.Topic.Slug(), t.Pages(), m.MessageID)
http.Redirect(w, r, murl, http.StatusFound)
}
func HandleListTopicMessages(ctx context.Context, w http.ResponseWriter, r *http.Request) {
tx, err := DB(ctx).Beginx()
if err != nil {
panic(err)
}
defer tx.Rollback()
store := NewStore(tx)
topicID, err := strconv.Atoi(param(ctx, "topicid"))
if err != nil || topicID < 0 {
tmpl.Render404(w, "Topic does not exist")
return
}
topic, err := store.TopicByID(uint(topicID))
if err == ErrNotFound {
tmpl.Render404(w, "Topic does not exist")
return
}
if err != nil {
tmpl.Render500(w, err)
return
}
if checkLastModified(w, r, topic.Updated) {
return
}
p := NewPaginator(r.URL.Query(), int(topic.Replies+1))
messages, err := store.TopicMessages(topic.TopicID, p.Offset(), p.Limit())
if err != nil {
tmpl.Render500(w, err)
return
}
type MessageWithUserPos struct {
*Message
*User
CollectionPos int // position number in messages collection
}
emsgs := make([]*MessageWithUserPos, 0, len(messages))
for i, m := range messages {
emsgs = append(emsgs, &MessageWithUserPos{
CollectionPos: i + (p.CurrentPage()-1)*int(p.PageSize()) + 1,
Message: &m.Message,
User: &m.User,
})
}
c := struct {
Topic *TopicWithUserCategory
Messages []*MessageWithUserPos
Paginator *Paginator
}{
Topic: topic,
Messages: emsgs,
Paginator: p,
}
tmpl.Render(w, http.StatusOK, "page_message_list", c)
}