func HandleListTopics(ctx context.Context, w http.ResponseWriter, r *http.Request) {
store := NewStore(DB(ctx))
p := NewSimplePaginator(time.Now())
if sec, err := strconv.Atoi(r.URL.Query().Get("page")); err == nil {
p.Current = int(sec)
}
if t, err := store.LastTopicUpdated(time.Unix(int64(p.Current), 0)); err != nil {
tmpl.Render500(w, err)
return
} else if checkLastModified(w, r, t) {
return
}
var categories []int
for _, raw := range r.URL.Query()["category"] {
if id, err := strconv.Atoi(raw); err == nil {
categories = append(categories, id)
}
}
topics, err := store.Topics(categories, time.Unix(int64(p.Current), 0), p.Limit())
if err != nil {
tmpl.Render500(w, err)
return
}
// if there are less topics than the page size, then this is the last page
if len(topics) == PageSize {
p.Next = int(topics[len(topics)-1].Updated.Unix())
}
c := struct {
Topics []*TopicWithUserCategory
Pagination *SimplePaginator
URLQuery URLQueryBuilder
}{
Topics: topics,
Pagination: p,
URLQuery: URLQueryBuilder{r},
}
tmpl.Render(w, http.StatusOK, "page_topic_list", c)
}
func HandleCreateTopic(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
}
var c struct {
Title string
TitleErr string
Category uint
CategoryErr string
Categories []*Category
Content string
ContentErr string
}
if r.Method == "GET" {
if cats, err := NewStore(DB(ctx)).Categories(); err != nil {
tmpl.Render500(w, err)
} else {
c.Categories = cats
tmpl.Render(w, http.StatusOK, "page_create_topic", c)
}
return
}
if err := r.ParseMultipartForm(2 << 20); err != nil {
tmpl.Render400(w, err.Error())
return
}
c.Content = strings.TrimSpace(r.FormValue("content"))
c.Title = strings.TrimSpace(r.FormValue("title"))
if len(c.Title) < 3 {
c.TitleErr = "Title must be at least 3 characters long"
}
if len(c.Title) > 200 {
c.TitleErr = "Title must not be longer than 200 characters"
}
if len(c.Content) < 3 {
c.ContentErr = "Content must be at least 3 characters long"
}
if len(c.Content) > 10000 {
c.ContentErr = "Content must be shorter than 10000 characters"
}
if raw := r.FormValue("category"); raw == "" {
c.CategoryErr = "Category is required"
} else {
if cat, err := strconv.Atoi(r.FormValue("category")); err == nil {
c.Category = uint(cat)
} else {
c.CategoryErr = "Invalid category"
}
}
if c.TitleErr != "" || c.ContentErr != "" || c.CategoryErr != "" {
if cats, err := NewStore(DB(ctx)).Categories(); err != nil {
tmpl.Render500(w, err)
} else {
c.Categories = cats
tmpl.Render(w, http.StatusBadRequest, "page_create_topic", c)
}
return
}
tx, err := DB(ctx).Beginx()
if err != nil {
tmpl.Render500(w, err)
return
}
defer tx.Rollback()
store := NewStore(tx)
now := time.Now()
topic, err := store.CreateTopic(c.Title, uid, c.Category, now)
if err != nil {
tmpl.Render500(w, err)
return
}
if _, err := store.CreateMessage(topic.TopicID, uid, c.Content, now); err != nil {
tmpl.Render500(w, err)
return
}
if err := tx.Commit(); err != nil {
tmpl.Render500(w, err)
return
}
turl := fmt.Sprintf("/t/%d/%s", topic.TopicID, topic.Slug())
http.Redirect(w, r, turl, 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)
}