package website import ( "errors" "fmt" "html/template" "net/http" "strconv" "time" "git.handmade.network/hmn/hmn/src/db" "git.handmade.network/hmn/hmn/src/hmnurl" "git.handmade.network/hmn/hmn/src/models" "git.handmade.network/hmn/hmn/src/oops" "git.handmade.network/hmn/hmn/src/templates" "git.handmade.network/hmn/hmn/src/utils" ) func BlogIndex(c *RequestContext) ResponseData { type blogIndexEntry struct { Title string Url string Author templates.User Date time.Time Content template.HTML } type blogIndexData struct { templates.BaseData Posts []blogIndexEntry Pagination templates.Pagination CanCreatePost bool NewPostUrl string } const postsPerPage = 5 numThreads, err := CountThreads(c.Context(), c.Conn, c.CurrentUser, ThreadsQuery{ ProjectIDs: []int{c.CurrentProject.ID}, ThreadTypes: []models.ThreadType{models.ThreadTypeProjectBlogPost}, }) if err != nil { return c.ErrorResponse(http.StatusInternalServerError, oops.New(err, "failed to fetch total number of blog posts")) } numPages := utils.NumPages(numThreads, postsPerPage) page, ok := ParsePageNumber(c, "page", numPages) if !ok { c.Redirect(c.UrlContext.BuildBlog(page), http.StatusSeeOther) } threads, err := FetchThreads(c.Context(), c.Conn, c.CurrentUser, ThreadsQuery{ ProjectIDs: []int{c.CurrentProject.ID}, ThreadTypes: []models.ThreadType{models.ThreadTypeProjectBlogPost}, Limit: postsPerPage, Offset: (page - 1) * postsPerPage, }) if err != nil { return c.ErrorResponse(http.StatusInternalServerError, oops.New(err, "failed to fetch blog posts for index")) } var entries []blogIndexEntry for _, thread := range threads { entries = append(entries, blogIndexEntry{ Title: thread.Thread.Title, Url: c.UrlContext.BuildBlogThread(thread.Thread.ID, thread.Thread.Title), Author: templates.UserToTemplate(thread.FirstPostAuthor, c.Theme), Date: thread.FirstPost.PostDate, Content: template.HTML(thread.FirstPostCurrentVersion.TextParsed), }) } baseData := getBaseData(c, fmt.Sprintf("%s Blog", c.CurrentProject.Name), []templates.Breadcrumb{BlogBreadcrumb(c.UrlContext)}) canCreate := false if c.CurrentProject.HasBlog() && c.CurrentUser != nil { isProjectOwner := false owners, err := FetchProjectOwners(c.Context(), c.Conn, c.CurrentProject.ID) if err != nil { return c.ErrorResponse(http.StatusInternalServerError, oops.New(err, "failed to fetch project owners")) } for _, owner := range owners { if owner.ID == c.CurrentUser.ID { isProjectOwner = true break } } canCreate = c.CurrentUser.IsStaff || isProjectOwner } var res ResponseData res.MustWriteTemplate("blog_index.html", blogIndexData{ BaseData: baseData, Posts: entries, Pagination: templates.Pagination{ Current: page, Total: numPages, FirstUrl: c.UrlContext.BuildBlog(1), LastUrl: c.UrlContext.BuildBlog(numPages), PreviousUrl: c.UrlContext.BuildBlog(utils.IntClamp(1, page-1, numPages)), NextUrl: c.UrlContext.BuildBlog(utils.IntClamp(1, page+1, numPages)), }, CanCreatePost: canCreate, NewPostUrl: c.UrlContext.BuildBlogNewThread(), }, c.Perf) return res } func BlogThread(c *RequestContext) ResponseData { type blogPostData struct { templates.BaseData Thread templates.Thread MainPost templates.Post Comments []templates.Post ReplyLink string LoginLink string } cd, ok := getCommonBlogData(c) if !ok { return FourOhFour(c) } thread, posts, err := FetchThreadPosts(c.Context(), c.Conn, c.CurrentUser, cd.ThreadID, PostsQuery{ ProjectIDs: []int{c.CurrentProject.ID}, ThreadTypes: []models.ThreadType{models.ThreadTypeProjectBlogPost}, }) if errors.Is(err, db.NotFound) { return FourOhFour(c) } else if err != nil { return c.ErrorResponse(http.StatusInternalServerError, oops.New(err, "failed to fetch posts for blog thread")) } var templatePosts []templates.Post for _, p := range posts { post := templates.PostToTemplate(&p.Post, p.Author, c.Theme) post.AddContentVersion(p.CurrentVersion, p.Editor) addBlogUrlsToPost(c.UrlContext, &post, &p.Thread, p.Post.ID) if p.ReplyPost != nil { reply := templates.PostToTemplate(p.ReplyPost, p.ReplyAuthor, c.Theme) addBlogUrlsToPost(c.UrlContext, &reply, &p.Thread, p.Post.ID) post.ReplyPost = &reply } templatePosts = append(templatePosts, post) } // Update thread last read info if c.CurrentUser != nil { c.Perf.StartBlock("SQL", "Update TLRI") _, err := c.Conn.Exec(c.Context(), ` INSERT INTO handmade_threadlastreadinfo (thread_id, user_id, lastread) VALUES ($1, $2, $3) ON CONFLICT (thread_id, user_id) DO UPDATE SET lastread = EXCLUDED.lastread `, cd.ThreadID, c.CurrentUser.ID, time.Now(), ) c.Perf.EndBlock() if err != nil { return c.ErrorResponse(http.StatusInternalServerError, oops.New(err, "failed to update blog tlri")) } } baseData := getBaseData(c, thread.Title, []templates.Breadcrumb{BlogBreadcrumb(c.UrlContext)}) baseData.OpenGraphItems = append(baseData.OpenGraphItems, templates.OpenGraphItem{ Property: "og:description", Value: posts[0].Post.Preview, }) var res ResponseData res.MustWriteTemplate("blog_post.html", blogPostData{ BaseData: baseData, Thread: templates.ThreadToTemplate(&thread), MainPost: templatePosts[0], Comments: templatePosts[1:], ReplyLink: c.UrlContext.BuildBlogPostReply(cd.ThreadID, posts[0].Post.ID), LoginLink: hmnurl.BuildLoginPage(c.FullUrl()), }, c.Perf) return res } func BlogPostRedirectToThread(c *RequestContext) ResponseData { cd, ok := getCommonBlogData(c) if !ok { return FourOhFour(c) } thread, err := FetchThread(c.Context(), c.Conn, c.CurrentUser, cd.ThreadID, ThreadsQuery{ ProjectIDs: []int{c.CurrentProject.ID}, ThreadTypes: []models.ThreadType{models.ThreadTypeProjectBlogPost}, }) if errors.Is(err, db.NotFound) { return FourOhFour(c) } else if err != nil { return c.ErrorResponse(http.StatusInternalServerError, oops.New(err, "failed to fetch thread for blog redirect")) } threadUrl := c.UrlContext.BuildBlogThreadWithPostHash(cd.ThreadID, thread.Thread.Title, cd.PostID) return c.Redirect(threadUrl, http.StatusFound) } func BlogNewThread(c *RequestContext) ResponseData { baseData := getBaseData( c, fmt.Sprintf("Create New Post | %s", c.CurrentProject.Name), []templates.Breadcrumb{BlogBreadcrumb(c.UrlContext)}, ) editData := getEditorDataForNew(c.UrlContext, c.CurrentUser, baseData, nil) editData.SubmitUrl = c.UrlContext.BuildBlogNewThread() editData.SubmitLabel = "Create Post" var res ResponseData res.MustWriteTemplate("editor.html", editData, c.Perf) return res } func BlogNewThreadSubmit(c *RequestContext) ResponseData { tx, err := c.Conn.Begin(c.Context()) if err != nil { panic(err) } defer tx.Rollback(c.Context()) err = c.Req.ParseForm() if err != nil { return c.ErrorResponse(http.StatusBadRequest, oops.New(err, "the form data was invalid")) } title := c.Req.Form.Get("title") unparsed := c.Req.Form.Get("body") if title == "" { return RejectRequest(c, "You must provide a title for your post.") } if unparsed == "" { return RejectRequest(c, "You must provide a body for your post.") } // Create thread var threadId int err = tx.QueryRow(c.Context(), ` INSERT INTO handmade_thread (title, type, project_id, first_id, last_id) VALUES ($1, $2, $3, $4, $5) RETURNING id `, title, models.ThreadTypeProjectBlogPost, c.CurrentProject.ID, -1, -1, ).Scan(&threadId) if err != nil { panic(oops.New(err, "failed to create thread")) } // Create everything else CreateNewPost(c.Context(), tx, c.CurrentProject.ID, threadId, models.ThreadTypeProjectBlogPost, c.CurrentUser.ID, nil, unparsed, c.Req.Host) err = tx.Commit(c.Context()) if err != nil { return c.ErrorResponse(http.StatusInternalServerError, oops.New(err, "failed to create new blog post")) } newThreadUrl := c.UrlContext.BuildBlogThread(threadId, title) return c.Redirect(newThreadUrl, http.StatusSeeOther) } func BlogPostEdit(c *RequestContext) ResponseData { cd, ok := getCommonBlogData(c) if !ok { return FourOhFour(c) } if !UserCanEditPost(c.Context(), c.Conn, *c.CurrentUser, cd.PostID) { return FourOhFour(c) } post, err := FetchThreadPost(c.Context(), c.Conn, c.CurrentUser, cd.ThreadID, cd.PostID, PostsQuery{ ProjectIDs: []int{c.CurrentProject.ID}, ThreadTypes: []models.ThreadType{models.ThreadTypeProjectBlogPost}, }) if errors.Is(err, db.NotFound) { return FourOhFour(c) } else if err != nil { return c.ErrorResponse(http.StatusInternalServerError, oops.New(err, "failed to get blog post to edit")) } title := "" if post.Thread.FirstID == post.Post.ID { title = fmt.Sprintf("Editing \"%s\" | %s", post.Thread.Title, c.CurrentProject.Name) } else { title = fmt.Sprintf("Editing Post | %s", c.CurrentProject.Name) } baseData := getBaseData( c, title, BlogThreadBreadcrumbs(c.UrlContext, &post.Thread), ) editData := getEditorDataForEdit(c.UrlContext, c.CurrentUser, baseData, post) editData.SubmitUrl = c.UrlContext.BuildBlogPostEdit(cd.ThreadID, cd.PostID) editData.SubmitLabel = "Submit Edited Post" if post.Thread.FirstID != post.Post.ID { editData.SubmitLabel = "Submit Edited Comment" } var res ResponseData res.MustWriteTemplate("editor.html", editData, c.Perf) return res } func BlogPostEditSubmit(c *RequestContext) ResponseData { cd, ok := getCommonBlogData(c) if !ok { return FourOhFour(c) } if !UserCanEditPost(c.Context(), c.Conn, *c.CurrentUser, cd.PostID) { return FourOhFour(c) } tx, err := c.Conn.Begin(c.Context()) if err != nil { panic(err) } defer tx.Rollback(c.Context()) post, err := FetchThreadPost(c.Context(), tx, c.CurrentUser, cd.ThreadID, cd.PostID, PostsQuery{ ProjectIDs: []int{c.CurrentProject.ID}, ThreadTypes: []models.ThreadType{models.ThreadTypeProjectBlogPost}, }) if errors.Is(err, db.NotFound) { return FourOhFour(c) } else if err != nil { return c.ErrorResponse(http.StatusInternalServerError, oops.New(err, "failed to get blog post to submit edits")) } c.Req.ParseForm() title := c.Req.Form.Get("title") unparsed := c.Req.Form.Get("body") editReason := c.Req.Form.Get("editreason") if title != "" && post.Thread.FirstID != post.Post.ID { return RejectRequest(c, "You can only edit the title by editing the first post.") } if unparsed == "" { return RejectRequest(c, "You must provide a post body.") } CreatePostVersion(c.Context(), tx, post.Post.ID, unparsed, c.Req.Host, editReason, &c.CurrentUser.ID) if title != "" { _, err := tx.Exec(c.Context(), ` UPDATE handmade_thread SET title = $1 WHERE id = $2 `, title, post.Thread.ID, ) if err != nil { return c.ErrorResponse(http.StatusInternalServerError, oops.New(err, "failed to update thread title")) } } err = tx.Commit(c.Context()) if err != nil { return c.ErrorResponse(http.StatusInternalServerError, oops.New(err, "failed to edit blog post")) } postUrl := c.UrlContext.BuildBlogThreadWithPostHash(cd.ThreadID, post.Thread.Title, cd.PostID) return c.Redirect(postUrl, http.StatusSeeOther) } func BlogPostReply(c *RequestContext) ResponseData { cd, ok := getCommonBlogData(c) if !ok { return FourOhFour(c) } post, err := FetchThreadPost(c.Context(), c.Conn, c.CurrentUser, cd.ThreadID, cd.PostID, PostsQuery{ ProjectIDs: []int{c.CurrentProject.ID}, ThreadTypes: []models.ThreadType{models.ThreadTypeProjectBlogPost}, }) if errors.Is(err, db.NotFound) { return FourOhFour(c) } else if err != nil { return c.ErrorResponse(http.StatusInternalServerError, oops.New(err, "failed to get blog post for reply")) } baseData := getBaseData( c, fmt.Sprintf("Replying to comment in \"%s\" | %s", post.Thread.Title, c.CurrentProject.Name), BlogThreadBreadcrumbs(c.UrlContext, &post.Thread), ) replyPost := templates.PostToTemplate(&post.Post, post.Author, c.Theme) replyPost.AddContentVersion(post.CurrentVersion, post.Editor) editData := getEditorDataForNew(c.UrlContext, c.CurrentUser, baseData, &replyPost) editData.SubmitUrl = c.UrlContext.BuildBlogPostReply(cd.ThreadID, cd.PostID) editData.SubmitLabel = "Submit Reply" var res ResponseData res.MustWriteTemplate("editor.html", editData, c.Perf) return res } func BlogPostReplySubmit(c *RequestContext) ResponseData { cd, ok := getCommonBlogData(c) if !ok { return FourOhFour(c) } tx, err := c.Conn.Begin(c.Context()) if err != nil { panic(err) } defer tx.Rollback(c.Context()) err = c.Req.ParseForm() if err != nil { return c.ErrorResponse(http.StatusBadRequest, oops.New(nil, "the form data was invalid")) } unparsed := c.Req.Form.Get("body") if unparsed == "" { return RejectRequest(c, "Your reply cannot be empty.") } newPostId, _ := CreateNewPost(c.Context(), tx, c.CurrentProject.ID, cd.ThreadID, models.ThreadTypeProjectBlogPost, c.CurrentUser.ID, &cd.PostID, unparsed, c.Req.Host) err = tx.Commit(c.Context()) if err != nil { return c.ErrorResponse(http.StatusInternalServerError, oops.New(err, "failed to reply to blog post")) } newPostUrl := c.UrlContext.BuildBlogPost(cd.ThreadID, newPostId) return c.Redirect(newPostUrl, http.StatusSeeOther) } func BlogPostDelete(c *RequestContext) ResponseData { cd, ok := getCommonBlogData(c) if !ok { return FourOhFour(c) } if !UserCanEditPost(c.Context(), c.Conn, *c.CurrentUser, cd.PostID) { return FourOhFour(c) } post, err := FetchThreadPost(c.Context(), c.Conn, c.CurrentUser, cd.ThreadID, cd.PostID, PostsQuery{ ProjectIDs: []int{c.CurrentProject.ID}, ThreadTypes: []models.ThreadType{models.ThreadTypeProjectBlogPost}, }) if errors.Is(err, db.NotFound) { return FourOhFour(c) } else if err != nil { return c.ErrorResponse(http.StatusInternalServerError, oops.New(err, "failed to get blog post to delete")) } title := "" if post.Thread.FirstID == post.Post.ID { title = fmt.Sprintf("Deleting \"%s\" | %s", post.Thread.Title, c.CurrentProject.Name) } else { title = fmt.Sprintf("Deleting comment in \"%s\" | %s", post.Thread.Title, c.CurrentProject.Name) } baseData := getBaseData( c, title, BlogThreadBreadcrumbs(c.UrlContext, &post.Thread), ) templatePost := templates.PostToTemplate(&post.Post, post.Author, c.Theme) templatePost.AddContentVersion(post.CurrentVersion, post.Editor) type blogPostDeleteData struct { templates.BaseData Post templates.Post SubmitUrl string } var res ResponseData res.MustWriteTemplate("blog_post_delete.html", blogPostDeleteData{ BaseData: baseData, SubmitUrl: c.UrlContext.BuildBlogPostDelete(cd.ThreadID, cd.PostID), Post: templatePost, }, c.Perf) return res } func BlogPostDeleteSubmit(c *RequestContext) ResponseData { cd, ok := getCommonBlogData(c) if !ok { return FourOhFour(c) } if !UserCanEditPost(c.Context(), c.Conn, *c.CurrentUser, cd.PostID) { return FourOhFour(c) } tx, err := c.Conn.Begin(c.Context()) if err != nil { panic(err) } defer tx.Rollback(c.Context()) threadDeleted := DeletePost(c.Context(), tx, cd.ThreadID, cd.PostID) err = tx.Commit(c.Context()) if err != nil { return c.ErrorResponse(http.StatusInternalServerError, oops.New(err, "failed to delete post")) } if threadDeleted { return c.Redirect(c.UrlContext.BuildHomepage(), http.StatusSeeOther) } else { thread, err := FetchThread(c.Context(), c.Conn, c.CurrentUser, cd.ThreadID, ThreadsQuery{ ProjectIDs: []int{c.CurrentProject.ID}, ThreadTypes: []models.ThreadType{models.ThreadTypeProjectBlogPost}, }) if errors.Is(err, db.NotFound) { panic(oops.New(err, "the thread was supposedly not deleted after deleting a post in a blog, but the thread was not found afterwards")) } else if err != nil { return c.ErrorResponse(http.StatusInternalServerError, oops.New(err, "failed to fetch thread after blog post delete")) } threadUrl := c.UrlContext.BuildBlogThread(thread.Thread.ID, thread.Thread.Title) return c.Redirect(threadUrl, http.StatusSeeOther) } } type commonBlogData struct { c *RequestContext ThreadID int PostID int } func getCommonBlogData(c *RequestContext) (commonBlogData, bool) { c.Perf.StartBlock("BLOGS", "Fetch common blog data") defer c.Perf.EndBlock() res := commonBlogData{ c: c, } if threadIdStr, hasThreadId := c.PathParams["threadid"]; hasThreadId { threadId, err := strconv.Atoi(threadIdStr) if err != nil { return commonBlogData{}, false } res.ThreadID = threadId c.Perf.StartBlock("SQL", "Verify that the thread exists") threadExists, err := db.QueryBool(c.Context(), c.Conn, ` SELECT COUNT(*) > 0 FROM handmade_thread WHERE id = $1 AND project_id = $2 `, res.ThreadID, c.CurrentProject.ID, ) c.Perf.EndBlock() if err != nil { panic(err) } if !threadExists { return commonBlogData{}, false } } if postIdStr, hasPostId := c.PathParams["postid"]; hasPostId { postId, err := strconv.Atoi(postIdStr) if err != nil { return commonBlogData{}, false } res.PostID = postId c.Perf.StartBlock("SQL", "Verify that the post exists") postExists, err := db.QueryBool(c.Context(), c.Conn, ` SELECT COUNT(*) > 0 FROM handmade_post WHERE id = $1 AND thread_id = $2 `, res.PostID, res.ThreadID, ) c.Perf.EndBlock() if err != nil { panic(err) } if !postExists { return commonBlogData{}, false } } return res, true } func addBlogUrlsToPost(urlContext *hmnurl.UrlContext, p *templates.Post, thread *models.Thread, postId int) { p.Url = urlContext.BuildBlogThreadWithPostHash(thread.ID, thread.Title, postId) p.DeleteUrl = urlContext.BuildBlogPostDelete(thread.ID, postId) p.EditUrl = urlContext.BuildBlogPostEdit(thread.ID, postId) p.ReplyUrl = urlContext.BuildBlogPostReply(thread.ID, postId) }