Simple blogging system written in Go https://goblog.app
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GoBlog/editor.go

260 lines
6.8 KiB

package main
import (
"context"
"encoding/json"
"fmt"
"io"
"net/http"
"net/http/httptest"
"net/url"
"time"
"go.goblog.app/app/pkgs/bufferpool"
"go.goblog.app/app/pkgs/contenttype"
"go.goblog.app/app/pkgs/htmlbuilder"
"gopkg.in/yaml.v3"
ws "nhooyr.io/websocket"
)
const editorPath = "/editor"
func (a *goBlog) serveEditor(w http.ResponseWriter, r *http.Request) {
a.render(w, r, a.renderEditor, &renderData{
Data: &editorRenderData{},
})
}
func (a *goBlog) serveEditorPreview(w http.ResponseWriter, r *http.Request) {
blog, _ := a.getBlog(r)
c, err := ws.Accept(w, r, &ws.AcceptOptions{CompressionMode: ws.CompressionContextTakeover})
if err != nil {
return
}
c.SetReadLimit(1 << 20) // 1MB
defer c.Close(ws.StatusNormalClosure, "")
ctx, cancel := context.WithTimeout(r.Context(), time.Minute*60)
defer cancel()
for {
// Retrieve content
mt, message, err := c.Reader(ctx)
if err != nil {
break
}
if mt != ws.MessageText {
continue
}
// Create preview
w, err := c.Writer(ctx, ws.MessageText)
if err != nil {
break
}
a.createMarkdownPreview(w, blog, message)
if err = w.Close(); err != nil {
break
}
}
}
func (a *goBlog) createMarkdownPreview(w io.Writer, blog string, markdown io.Reader) {
md, err := io.ReadAll(markdown)
if err != nil {
_, _ = io.WriteString(w, err.Error())
return
}
p := &post{
Blog: blog,
Content: string(md),
}
if err = a.extractParamsFromContent(p); err != nil {
_, _ = io.WriteString(w, err.Error())
return
}
if err := a.checkPost(p); err != nil {
_, _ = io.WriteString(w, err.Error())
return
}
if t := p.Title(); t != "" {
p.RenderedTitle = a.renderMdTitle(t)
}
// Render post (using post's blog config)
hb := htmlbuilder.NewHtmlBuilder(w)
a.renderEditorPreview(hb, a.cfg.Blogs[p.Blog], p)
}
func (a *goBlog) serveEditorPost(w http.ResponseWriter, r *http.Request) {
if action := r.FormValue("editoraction"); action != "" {
switch action {
case "loadupdate":
post, err := a.getPost(r.FormValue("path"))
if err != nil {
a.serveError(w, r, err.Error(), http.StatusBadRequest)
return
}
a.render(w, r, a.renderEditor, &renderData{
Data: &editorRenderData{
updatePostUrl: a.fullPostURL(post),
updatePostContent: a.postToMfItem(post).Properties.Content[0],
},
})
case "updatepost":
buf := bufferpool.Get()
defer bufferpool.Put(buf)
err := json.NewEncoder(buf).Encode(map[string]any{
"action": actionUpdate,
"url": r.FormValue("url"),
"replace": map[string][]string{
"content": {
r.FormValue("content"),
},
},
})
if err != nil {
a.serveError(w, r, err.Error(), http.StatusInternalServerError)
return
}
req, err := http.NewRequestWithContext(r.Context(), http.MethodPost, "", buf)
if err != nil {
a.serveError(w, r, err.Error(), http.StatusInternalServerError)
return
}
req.Header.Set(contentType, contenttype.JSON)
a.editorMicropubPost(w, req, false)
case "upload":
a.editorMicropubPost(w, r, true)
case "tts":
parsedURL, err := url.Parse(r.FormValue("url"))
if err != nil {
a.serveError(w, r, err.Error(), http.StatusBadRequest)
return
}
post, err := a.getPost(parsedURL.Path)
if err != nil {
a.serveError(w, r, err.Error(), http.StatusBadRequest)
return
}
if err = a.createPostTTSAudio(post); err != nil {
a.serveError(w, r, err.Error(), http.StatusInternalServerError)
return
}
http.Redirect(w, r, post.Path, http.StatusFound)
case "helpgpx":
file, _, err := r.FormFile("file")
if err != nil {
a.serveError(w, r, err.Error(), http.StatusBadRequest)
return
}
gpx, err := io.ReadAll(a.min.Get().Reader(contenttype.XML, file))
if err != nil {
a.serveError(w, r, err.Error(), http.StatusBadRequest)
return
}
w.Header().Set(contentType, contenttype.TextUTF8)
_ = yaml.NewEncoder(w).Encode(map[string]string{
"gpx": string(gpx),
})
default:
a.serveError(w, r, "Unknown editoraction", http.StatusBadRequest)
}
return
}
a.editorMicropubPost(w, r, false)
}
func (a *goBlog) editorMicropubPost(w http.ResponseWriter, r *http.Request, media bool) {
recorder := httptest.NewRecorder()
if media {
addAllScopes(http.HandlerFunc(a.serveMicropubMedia)).ServeHTTP(recorder, r)
} else {
addAllScopes(http.HandlerFunc(a.serveMicropubPost)).ServeHTTP(recorder, r)
}
result := recorder.Result()
if location := result.Header.Get("Location"); location != "" {
http.Redirect(w, r, location, http.StatusFound)
return
}
if result.StatusCode >= 200 && result.StatusCode < 400 {
http.Redirect(w, r, editorPath, http.StatusFound)
return
}
w.WriteHeader(result.StatusCode)
_, _ = io.Copy(w, result.Body)
_ = result.Body.Close()
}
func (*goBlog) editorPostTemplate(blog string, bc *configBlog) string {
builder := bufferpool.Get()
defer bufferpool.Put(builder)
marsh := func(param string, i any) {
_ = yaml.NewEncoder(builder).Encode(map[string]any{
param: i,
})
}
builder.WriteString("---\n")
marsh("blog", blog)
marsh("section", bc.DefaultSection)
marsh("status", statusDraft)
marsh("visibility", visibilityPublic)
marsh("priority", 0)
marsh("slug", "")
marsh("title", "")
for _, t := range bc.Taxonomies {
marsh(t.Name, []string{""})
}
builder.WriteString("---\n")
return builder.String()
}
func (a *goBlog) editorPostDesc(bc *configBlog) string {
t := a.ts.GetTemplateStringVariant(bc.Lang, "editorpostdesc")
paramBuilder, statusBuilder, visibilityBuilder := bufferpool.Get(), bufferpool.Get(), bufferpool.Get()
defer bufferpool.Put(paramBuilder, statusBuilder, visibilityBuilder)
for i, param := range []string{
"published",
"updated",
"summary",
"translationkey",
"original",
a.cfg.Micropub.AudioParam,
a.cfg.Micropub.BookmarkParam,
a.cfg.Micropub.LikeParam,
a.cfg.Micropub.LikeTitleParam,
a.cfg.Micropub.LocationParam,
a.cfg.Micropub.PhotoParam,
a.cfg.Micropub.PhotoDescriptionParam,
a.cfg.Micropub.ReplyParam,
a.cfg.Micropub.ReplyTitleParam,
gpxParameter,
} {
if param == "" {
continue
}
if i > 0 {
paramBuilder.WriteString(", ")
}
paramBuilder.WriteByte('`')
paramBuilder.WriteString(param)
paramBuilder.WriteByte('`')
}
for i, status := range []postStatus{
statusPublished, statusDraft, statusScheduled,
} {
if i > 0 {
statusBuilder.WriteString(", ")
}
statusBuilder.WriteByte('`')
statusBuilder.WriteString(string(status))
statusBuilder.WriteByte('`')
}
for i, visibility := range []postVisibility{
visibilityPublic, visibilityUnlisted, visibilityPrivate,
} {
if i > 0 {
visibilityBuilder.WriteString(", ")
}
visibilityBuilder.WriteByte('`')
visibilityBuilder.WriteString(string(visibility))
visibilityBuilder.WriteByte('`')
}
return fmt.Sprintf(t, paramBuilder.String(), "status", "visibility", statusBuilder.String(), visibilityBuilder.String())
}