hmn/src/website/blogs.go

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2021-07-30 19:59:48 +00:00
package website
import (
"net/http"
"strconv"
"git.handmade.network/hmn/hmn/src/db"
"git.handmade.network/hmn/hmn/src/hmnurl"
"git.handmade.network/hmn/hmn/src/templates"
)
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 := FetchThreadPostsAndStuff(
c.Context(),
c.Conn,
cd.ThreadID,
0, 0,
)
var templatePosts []templates.Post
for _, p := range posts {
post := templates.PostToTemplate(&p.Post, p.Author, c.Theme)
post.AddContentVersion(p.CurrentVersion, p.Editor)
addBlogUrlsToPost(&post, c.CurrentProject.Slug, p.Thread.ID, p.Post.ID)
if p.ReplyPost != nil {
reply := templates.PostToTemplate(p.ReplyPost, p.ReplyAuthor, c.Theme)
addBlogUrlsToPost(&reply, c.CurrentProject.Slug, p.Thread.ID, p.Post.ID)
post.ReplyPost = &reply
}
templatePosts = append(templatePosts, post)
}
baseData := getBaseData(c)
baseData.Title = thread.Title
var res ResponseData
res.MustWriteTemplate("blog_post.html", blogPostData{
BaseData: baseData,
Thread: templates.ThreadToTemplate(&thread),
MainPost: templatePosts[0],
Comments: templatePosts[1:],
}, c.Perf)
return res
}
func BlogPostRedirectToThread(c *RequestContext) ResponseData {
cd, ok := getCommonBlogData(c)
if !ok {
return FourOhFour(c)
}
thread := FetchThread(c.Context(), c.Conn, cd.ThreadID)
threadUrl := hmnurl.BuildBlogThread(c.CurrentProject.Slug, cd.ThreadID, thread.Title, 1)
return c.Redirect(threadUrl, http.StatusFound)
}
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(p *templates.Post, projectSlug string, threadId int, postId int) {
p.Url = hmnurl.BuildBlogPost(projectSlug, threadId, postId)
p.DeleteUrl = hmnurl.BuildBlogPostDelete(projectSlug, threadId, postId)
p.EditUrl = hmnurl.BuildBlogPostEdit(projectSlug, threadId, postId)
p.ReplyUrl = hmnurl.BuildBlogPostReply(projectSlug, threadId, postId)
}