mirror of https://github.com/jlelse/GoBlog
424 lines
12 KiB
Go
424 lines
12 KiB
Go
package main
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import (
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"context"
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"errors"
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"fmt"
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"net/http"
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"net/url"
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"path"
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"reflect"
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"strings"
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"time"
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"github.com/go-chi/chi/v5"
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"github.com/samber/lo"
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"github.com/vcraescu/go-paginator/v2"
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"go.goblog.app/app/pkgs/bufferpool"
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)
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var errPostNotFound = errors.New("post not found")
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type post struct {
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Path string
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Content string
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Published string
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Updated string
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Parameters map[string][]string
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Blog string
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Section string
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Status postStatus
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Visibility postVisibility
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Priority int
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// Not persisted
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Slug string
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RenderedTitle string
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}
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type postStatus string
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type postVisibility string
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const (
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statusDeletedSuffix postStatus = "-deleted"
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statusNil postStatus = ""
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statusPublished postStatus = "published"
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statusPublishedDeleted = statusPublished + statusDeletedSuffix
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statusDraft postStatus = "draft"
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statusDraftDeleted = statusDraft + statusDeletedSuffix
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statusScheduled postStatus = "scheduled"
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statusScheduledDeleted = statusScheduled + statusDeletedSuffix
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visibilityNil postVisibility = ""
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visibilityPublic postVisibility = "public"
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visibilityUnlisted postVisibility = "unlisted"
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visibilityPrivate postVisibility = "private"
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)
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func validPostStatus(s postStatus) bool {
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return s == statusPublished || s == statusPublishedDeleted ||
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s == statusDraft || s == statusDraftDeleted ||
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s == statusScheduled || s == statusScheduledDeleted
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}
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func validPostVisibility(v postVisibility) bool {
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return v == visibilityPublic || v == visibilityUnlisted || v == visibilityPrivate
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}
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func (a *goBlog) servePost(w http.ResponseWriter, r *http.Request) {
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p, err := a.getPost(r.URL.Path)
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if errors.Is(err, errPostNotFound) {
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a.serve404(w, r)
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return
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} else if err != nil {
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a.serveError(w, r, err.Error(), http.StatusInternalServerError)
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return
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}
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status := http.StatusOK
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if p.Deleted() {
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status = http.StatusGone
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}
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if asRequest, ok := r.Context().Value(asRequestKey).(bool); ok && asRequest {
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if r.URL.Path == a.getRelativePath(p.Blog, "") {
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a.serveActivityStreams(w, r, status, p.Blog)
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return
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}
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a.serveActivityStreamsPost(w, r, status, p)
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return
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}
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canonical := p.firstParameter("original")
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if canonical == "" {
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canonical = a.fullPostURL(p)
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}
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renderMethod := a.renderPost
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if p.Path == a.getRelativePath(p.Blog, "") {
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renderMethod = a.renderStaticHome
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}
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if p.Visibility != visibilityPublic {
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w.Header().Set("X-Robots-Tag", "noindex")
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}
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w.Header().Add("Link", fmt.Sprintf("<%s>; rel=shortlink", a.shortPostURL(p)))
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a.renderWithStatusCode(w, r, status, renderMethod, &renderData{
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BlogString: p.Blog,
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Canonical: canonical,
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Data: p,
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})
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}
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const defaultRandomPath = "/random"
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func (a *goBlog) redirectToRandomPost(rw http.ResponseWriter, r *http.Request) {
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blog, _ := a.getBlog(r)
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randomPath, err := a.getRandomPostPath(blog)
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if err != nil {
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a.serveError(rw, r, err.Error(), http.StatusInternalServerError)
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return
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}
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http.Redirect(rw, r, randomPath, http.StatusFound)
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}
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const defaultOnThisDayPath = "/onthisday"
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func (a *goBlog) redirectToOnThisDay(w http.ResponseWriter, r *http.Request) {
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_, bc := a.getBlog(r)
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// Get current local month and day
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now := time.Now()
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month := now.Month()
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day := now.Day()
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// Build the path
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targetPath := fmt.Sprintf("/x/%02d/%02d", month, day)
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targetPath = bc.getRelativePath(targetPath)
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// Redirect
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http.Redirect(w, r, targetPath, http.StatusFound)
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}
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type postPaginationAdapter struct {
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config *postsRequestConfig
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nums int64
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a *goBlog
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}
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func (p *postPaginationAdapter) Nums() (int64, error) {
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if p.nums == 0 {
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p.nums = int64(noError(p.a.db.countPosts(p.config)))
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}
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return p.nums, nil
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}
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func (p *postPaginationAdapter) Slice(offset, length int, data any) error {
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modifiedConfig := *p.config
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modifiedConfig.offset = offset
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modifiedConfig.limit = length
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posts, err := p.a.getPosts(&modifiedConfig)
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reflect.ValueOf(data).Elem().Set(reflect.ValueOf(&posts).Elem())
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return err
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}
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func (a *goBlog) serveHome(w http.ResponseWriter, r *http.Request) {
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blog, bc := a.getBlog(r)
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if asRequest, ok := r.Context().Value(asRequestKey).(bool); ok && asRequest {
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a.serveActivityStreams(w, r, http.StatusOK, blog)
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return
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}
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a.serveIndex(w, r.WithContext(context.WithValue(r.Context(), indexConfigKey, &indexConfig{
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path: a.getRelativePath(blog, ""),
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sections: lo.Filter(lo.Values(bc.Sections), func(s *configSection, _ int) bool { return !s.HideOnStart }),
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})))
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}
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func (a *goBlog) serveDrafts(w http.ResponseWriter, r *http.Request) {
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_, bc := a.getBlog(r)
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a.serveIndex(w, r.WithContext(context.WithValue(r.Context(), indexConfigKey, &indexConfig{
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path: bc.getRelativePath("/editor/drafts"),
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title: a.ts.GetTemplateStringVariant(bc.Lang, "drafts"),
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description: a.ts.GetTemplateStringVariant(bc.Lang, "draftsdesc"),
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status: []postStatus{statusDraft},
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})))
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}
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func (a *goBlog) servePrivate(w http.ResponseWriter, r *http.Request) {
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_, bc := a.getBlog(r)
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a.serveIndex(w, r.WithContext(context.WithValue(r.Context(), indexConfigKey, &indexConfig{
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path: bc.getRelativePath("/editor/private"),
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title: a.ts.GetTemplateStringVariant(bc.Lang, "privateposts"),
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description: a.ts.GetTemplateStringVariant(bc.Lang, "privatepostsdesc"),
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status: []postStatus{statusPublished},
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visibility: []postVisibility{visibilityPrivate},
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})))
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}
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func (a *goBlog) serveUnlisted(w http.ResponseWriter, r *http.Request) {
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_, bc := a.getBlog(r)
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a.serveIndex(w, r.WithContext(context.WithValue(r.Context(), indexConfigKey, &indexConfig{
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path: bc.getRelativePath("/editor/unlisted"),
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title: a.ts.GetTemplateStringVariant(bc.Lang, "unlistedposts"),
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description: a.ts.GetTemplateStringVariant(bc.Lang, "unlistedpostsdesc"),
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status: []postStatus{statusPublished},
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visibility: []postVisibility{visibilityUnlisted},
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})))
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}
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func (a *goBlog) serveScheduled(w http.ResponseWriter, r *http.Request) {
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_, bc := a.getBlog(r)
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a.serveIndex(w, r.WithContext(context.WithValue(r.Context(), indexConfigKey, &indexConfig{
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path: bc.getRelativePath("/editor/scheduled"),
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title: a.ts.GetTemplateStringVariant(bc.Lang, "scheduledposts"),
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description: a.ts.GetTemplateStringVariant(bc.Lang, "scheduledpostsdesc"),
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status: []postStatus{statusScheduled},
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})))
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}
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func (a *goBlog) serveDeleted(w http.ResponseWriter, r *http.Request) {
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_, bc := a.getBlog(r)
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a.serveIndex(w, r.WithContext(context.WithValue(r.Context(), indexConfigKey, &indexConfig{
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path: bc.getRelativePath("/editor/deleted"),
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title: a.ts.GetTemplateStringVariant(bc.Lang, "deletedposts"),
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description: a.ts.GetTemplateStringVariant(bc.Lang, "deletedpostsdesc"),
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status: []postStatus{statusPublishedDeleted, statusDraftDeleted, statusScheduledDeleted},
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})))
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}
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func (a *goBlog) serveDate(w http.ResponseWriter, r *http.Request) {
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year, month, day, title, datePath := a.extractDate(r)
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if year == 0 && month == 0 && day == 0 {
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a.serve404(w, r)
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return
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}
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var ic *indexConfig
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if cv := r.Context().Value(indexConfigKey); cv != nil {
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origIc := *(cv.(*indexConfig))
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copyIc := origIc
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ic = ©Ic
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ic.path = path.Join(ic.path, datePath)
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ic.titleSuffix = ": " + title
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} else {
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_, bc := a.getBlog(r)
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ic = &indexConfig{
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path: bc.getRelativePath(datePath),
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title: title,
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}
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}
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ic.year, ic.month, ic.day = year, month, day
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a.serveIndex(w, r.WithContext(context.WithValue(r.Context(), indexConfigKey, ic)))
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}
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func (a *goBlog) extractDate(r *http.Request) (year, month, day int, title, datePath string) {
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if ys := chi.URLParam(r, "year"); ys != "" && ys != "x" {
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year = stringToInt(ys)
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}
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if ms := chi.URLParam(r, "month"); ms != "" && ms != "x" {
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month = stringToInt(ms)
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}
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if ds := chi.URLParam(r, "day"); ds != "" {
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day = stringToInt(ds)
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}
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titleBuf, pathBuf := bufferpool.Get(), bufferpool.Get()
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defer bufferpool.Put(titleBuf, pathBuf)
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if year != 0 {
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_, _ = fmt.Fprintf(titleBuf, "%0004d", year)
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_, _ = fmt.Fprintf(pathBuf, "%0004d", year)
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} else {
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_, _ = titleBuf.WriteString("XXXX")
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_, _ = pathBuf.WriteString("x")
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}
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if month != 0 {
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_, _ = fmt.Fprintf(titleBuf, "-%02d", month)
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_, _ = fmt.Fprintf(pathBuf, "/%02d", month)
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} else if day != 0 {
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_, _ = titleBuf.WriteString("-XX")
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_, _ = pathBuf.WriteString("/x")
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}
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if day != 0 {
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_, _ = fmt.Fprintf(titleBuf, "-%02d", day)
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_, _ = fmt.Fprintf(pathBuf, "/%02d", day)
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}
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title = titleBuf.String()
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datePath = pathBuf.String()
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return
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}
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type indexConfig struct {
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path string
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section *configSection
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sections []*configSection
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tax *configTaxonomy
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taxValue string
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parameter string
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year, month, day int
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title string
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titleSuffix string
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description string
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summaryTemplate summaryTyp
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status []postStatus
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visibility []postVisibility
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search string
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}
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const defaultPhotosPath = "/photos"
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const indexConfigKey contextKey = "indexConfig"
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func (a *goBlog) serveIndex(w http.ResponseWriter, r *http.Request) {
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ic := r.Context().Value(indexConfigKey).(*indexConfig)
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blog, bc := a.getBlog(r)
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sections := lo.Map(ic.sections, func(i *configSection, _ int) string { return i.Name })
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if ic.section != nil {
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sections = append(sections, ic.section.Name)
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}
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defaultStatus, defaultVisibility := a.getDefaultPostStates(r)
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status := ic.status
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if len(status) == 0 {
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status = defaultStatus
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}
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visibility := ic.visibility
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if len(visibility) == 0 {
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visibility = defaultVisibility
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}
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// Parameter filter
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params, paramValues := []string{}, []string{}
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paramUrlValues := url.Values{}
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for param, values := range r.URL.Query() {
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if strings.HasPrefix(param, "p:") {
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paramKey := strings.TrimPrefix(param, "p:")
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for _, value := range values {
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params, paramValues = append(params, paramKey), append(paramValues, value)
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paramUrlValues.Add(param, value)
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}
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}
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}
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paramUrlQuery := ""
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if len(paramUrlValues) > 0 {
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paramUrlQuery += "?" + paramUrlValues.Encode()
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}
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// Create paginator
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p := paginator.New(&postPaginationAdapter{config: &postsRequestConfig{
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blog: blog,
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sections: sections,
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taxonomy: ic.tax,
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taxonomyValue: ic.taxValue,
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parameter: ic.parameter,
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allParams: params,
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allParamValues: paramValues,
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search: ic.search,
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publishedYear: ic.year,
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publishedMonth: ic.month,
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publishedDay: ic.day,
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status: status,
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visibility: visibility,
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priorityOrder: true,
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}, a: a}, bc.Pagination)
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p.SetPage(stringToInt(chi.URLParam(r, "page")))
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var posts []*post
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err := p.Results(&posts)
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if err != nil {
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a.serveError(w, r, err.Error(), http.StatusInternalServerError)
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return
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}
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// Title
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var title string
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if ic.title != "" {
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title = ic.title
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} else if ic.section != nil {
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title = ic.section.Title
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} else if ic.tax != nil {
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title = fmt.Sprintf("%s: %s", ic.tax.Title, ic.taxValue)
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} else if ic.search != "" {
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title = fmt.Sprintf("%s: %s", bc.Search.Title, ic.search)
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}
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title += ic.titleSuffix
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// Description
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var description string
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if ic.description != "" {
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description = ic.description
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} else if ic.section != nil {
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description = ic.section.Description
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}
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// Check if feed
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if ft := feedType(chi.URLParam(r, "feed")); ft != noFeed {
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a.generateFeed(blog, ft, w, r, posts, title, description, ic.path, paramUrlQuery)
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return
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}
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// Navigation
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var hasPrev, hasNext bool
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var prevPage, nextPage int
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var prevPath, nextPath string
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hasPrev, _ = p.HasPrev()
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if hasPrev {
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prevPage, _ = p.PrevPage()
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} else {
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prevPage, _ = p.Page()
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}
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if prevPage < 2 {
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prevPath = ic.path
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} else {
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prevPath = fmt.Sprintf("%s/page/%d", strings.TrimSuffix(ic.path, "/"), prevPage)
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}
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hasNext, _ = p.HasNext()
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if hasNext {
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nextPage, _ = p.NextPage()
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} else {
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nextPage, _ = p.Page()
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}
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nextPath = fmt.Sprintf("%s/page/%d", strings.TrimSuffix(ic.path, "/"), nextPage)
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summaryTemplate := ic.summaryTemplate
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if summaryTemplate == "" {
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summaryTemplate = defaultSummary
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}
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a.render(w, r, a.renderIndex, &renderData{
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Canonical: a.getFullAddress(ic.path) + paramUrlQuery,
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Data: &indexRenderData{
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title: title,
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description: description,
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posts: posts,
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hasPrev: hasPrev,
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hasNext: hasNext,
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first: ic.path,
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prev: prevPath,
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next: nextPath,
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summaryTemplate: summaryTemplate,
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paramUrlQuery: paramUrlQuery,
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},
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})
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}
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