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60 lines
1.2 KiB
60 lines
1.2 KiB
package http
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import (
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"fmt"
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"net/http"
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"path/filepath"
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"strings"
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"github.com/mediocregopher/blog.mediocregopher.com/srv/http/apiutil"
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"github.com/mediocregopher/blog.mediocregopher.com/srv/post"
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)
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func (a *api) renderIndexHandler() http.Handler {
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tpl := a.mustParseBasedTpl("index.html")
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const pageCount = 10
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return http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
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if path := r.URL.Path; !strings.HasSuffix(path, "/") && filepath.Base(path) != "index.html" {
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http.Error(rw, "Page not found", 404)
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return
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}
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page, err := apiutil.StrToInt(r.FormValue("p"), 0)
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if err != nil {
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apiutil.BadRequest(
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rw, r, fmt.Errorf("invalid page number: %w", err),
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)
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return
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}
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posts, hasMore, err := a.params.PostStore.Get(page, pageCount)
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if err != nil {
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apiutil.InternalServerError(
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rw, r, fmt.Errorf("fetching page %d of posts: %w", page, err),
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)
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return
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}
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tplPayload := struct {
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Posts []post.StoredPost
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PrevPage, NextPage int
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}{
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Posts: posts,
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PrevPage: -1,
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NextPage: -1,
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}
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if page > 0 {
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tplPayload.PrevPage = page - 1
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}
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if hasMore {
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tplPayload.NextPage = page + 1
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}
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executeTemplate(rw, r, tpl, tplPayload)
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})
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}
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