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package http
import (
"errors"
"fmt"
"net/http"
"path/filepath"
"strings"
"github.com/mediocregopher/blog.mediocregopher.com/srv/http/apiutil"
"github.com/mediocregopher/blog.mediocregopher.com/srv/post"
)
func (a *api) renderDraftPostHandler() http.Handler {
tpl := a.mustParseBasedTpl("post.html")
renderDraftPostsIndexHandler := a.renderDraftPostsIndexHandler()
renderDraftEditPostHandler := a.renderEditPostHandler(true)
return http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
id := strings.TrimSuffix(filepath.Base(r.URL.Path), ".html")
if id == "/" {
renderDraftPostsIndexHandler.ServeHTTP(rw, r)
return
}
if _, ok := r.URL.Query()["edit"]; ok {
renderDraftEditPostHandler.ServeHTTP(rw, r)
return
}
p, err := a.params.PostDraftStore.GetByID(id)
if errors.Is(err, post.ErrPostNotFound) {
http.Error(rw, "Post not found", 404)
return
} else if err != nil {
apiutil.InternalServerError(
rw, r, fmt.Errorf("fetching post with id %q: %w", id, err),
)
return
}
tplPayload, err := a.postToPostTplPayload(post.StoredPost{Post: p})
if err != nil {
apiutil.InternalServerError(
rw, r, fmt.Errorf(
"generating template payload for post with id %q: %w",
id, err,
),
)
return
}
executeTemplate(rw, r, tpl, tplPayload)
})
}
func (a *api) renderDraftPostsIndexHandler() http.Handler {
renderEditPostHandler := a.renderEditPostHandler(true)
tpl := a.mustParseBasedTpl("draft-posts.html")
const pageCount = 20
return http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
if _, ok := r.URL.Query()["edit"]; ok {
renderEditPostHandler.ServeHTTP(rw, r)
return
}
page, err := apiutil.StrToInt(r.FormValue("p"), 0)
if err != nil {
apiutil.BadRequest(
rw, r, fmt.Errorf("invalid page number: %w", err),
)
return
}
posts, hasMore, err := a.params.PostDraftStore.Get(page, pageCount)
if err != nil {
apiutil.InternalServerError(
rw, r, fmt.Errorf("fetching page %d of posts: %w", page, err),
)
return
}
tplPayload := struct {
Posts []post.Post
PrevPage, NextPage int
}{
Posts: posts,
PrevPage: -1,
NextPage: -1,
}
if page > 0 {
tplPayload.PrevPage = page - 1
}
if hasMore {
tplPayload.NextPage = page + 1
}
executeTemplate(rw, r, tpl, tplPayload)
})
}
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