459 lines
15 KiB
Go
459 lines
15 KiB
Go
package forum
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import (
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"bytes"
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"fmt"
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"io"
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"net/http"
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"os"
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"path/filepath"
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"strconv"
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"code.nonshy.com/nonshy/website/pkg/config"
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"code.nonshy.com/nonshy/website/pkg/log"
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"code.nonshy.com/nonshy/website/pkg/markdown"
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"code.nonshy.com/nonshy/website/pkg/models"
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"code.nonshy.com/nonshy/website/pkg/photo"
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"code.nonshy.com/nonshy/website/pkg/session"
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"code.nonshy.com/nonshy/website/pkg/templates"
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)
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// NewPost view.
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func NewPost() http.HandlerFunc {
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tmpl := templates.Must("forum/new_post.html")
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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// Query params.
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var (
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fragment = r.FormValue("to") // forum to (new post)
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toThreadID = r.FormValue("thread") // add reply to a thread ID
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quoteCommentID = r.FormValue("quote") // add reply to thread while quoting a comment
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editCommentID = r.FormValue("edit") // edit your comment
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intent = r.FormValue("intent") // preview or submit
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photoIntent = r.FormValue("photo_intent") // upload, remove photo attachment
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photoID = r.FormValue("photo_id") // existing CommentPhoto ID
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title = r.FormValue("title") // for new forum post only
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message = r.PostFormValue("message") // comment body
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isPinned = r.PostFormValue("pinned") == "true" // owners or admins only
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isExplicit = r.PostFormValue("explicit") == "true" // for thread only
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isNoReply = r.PostFormValue("noreply") == "true" // for thread only
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isDelete = r.FormValue("delete") == "true" // delete comment (along with edit=$id)
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forum *models.Forum
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thread *models.Thread // if replying to a thread
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comment *models.Comment // if editing a comment
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// If we are modifying a comment (post) and it's the OG post of the
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// thread, we show and accept the thread settings to be updated as
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// well (pinned, explicit, noreply)
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isOriginalComment bool
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// Polls
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pollOptions = []string{}
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pollExpires = 3
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pollMultipleChoice = r.FormValue("poll_multiple_choice") == "true"
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isPoll bool
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// Attached photo object.
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commentPhoto *models.CommentPhoto
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)
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// Get the current user.
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currentUser, err := session.CurrentUser(r)
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if err != nil {
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session.FlashError(w, r, "Couldn't get current user: %s", err)
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templates.Redirect(w, "/")
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return
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}
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// Look up the forum itself.
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if found, err := models.ForumByFragment(fragment); err != nil {
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session.FlashError(w, r, "Couldn't post to forum %s: not found.", fragment)
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templates.Redirect(w, "/forum")
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return
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} else {
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forum = found
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}
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// Are we manipulating a reply to an existing thread?
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if len(toThreadID) > 0 {
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if i, err := strconv.Atoi(toThreadID); err == nil {
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if found, err := models.GetThread(uint64(i)); err != nil {
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session.FlashError(w, r, "Couldn't find that thread ID!")
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templates.Redirect(w, fmt.Sprintf("/f/%s", forum.Fragment))
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return
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} else {
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thread = found
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}
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}
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}
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// Does the comment have an existing Photo ID?
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if len(photoID) > 0 {
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if i, err := strconv.Atoi(photoID); err == nil {
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if found, err := models.GetCommentPhoto(uint64(i)); err != nil {
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session.FlashError(w, r, "Couldn't find comment photo ID #%d!", i)
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templates.Redirect(w, fmt.Sprintf("/f/%s", forum.Fragment))
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return
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} else {
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commentPhoto = found
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}
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}
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}
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// Are we pre-filling the message with a quotation of an existing comment?
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if len(quoteCommentID) > 0 {
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if i, err := strconv.Atoi(quoteCommentID); err == nil {
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if comment, err := models.GetComment(uint64(i)); err == nil {
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message = markdown.Quotify(comment.Message) + "\n\n"
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}
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}
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}
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// Are we editing or deleting our comment?
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if len(editCommentID) > 0 {
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if i, err := strconv.Atoi(editCommentID); err == nil {
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if found, err := models.GetComment(uint64(i)); err == nil {
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comment = found
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// Verify that it is indeed OUR comment.
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if currentUser.ID != comment.UserID && !currentUser.IsAdmin {
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templates.ForbiddenPage(w, r)
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return
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}
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// Initialize the form w/ the content of this message.
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if r.Method == http.MethodGet {
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message = comment.Message
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}
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// Did this comment have a picture? Load it if so.
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if photos, err := comment.GetPhotos(); err == nil && len(photos) > 0 {
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commentPhoto = photos[0]
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}
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// Is this the OG thread of the post?
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if thread.CommentID == comment.ID {
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isOriginalComment = true
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// Restore the checkbox option form values from thread settings.
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if r.Method == http.MethodGet {
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isPinned = thread.Pinned
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isExplicit = thread.Explicit
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isNoReply = thread.NoReply
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}
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}
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// Are we DELETING this comment?
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if isDelete {
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// Is there a photo attachment? Remove it, too.
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if commentPhoto != nil {
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if err := photo.Delete(commentPhoto.Filename); err != nil {
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session.FlashError(w, r, "Error removing the photo from disk: %s", err)
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}
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if err := commentPhoto.Delete(); err != nil {
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session.FlashError(w, r, "Couldn't remove photo from DB: %s", err)
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} else {
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commentPhoto = nil
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}
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}
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if err := thread.DeleteReply(comment); err != nil {
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session.FlashError(w, r, "Error deleting your post: %s", err)
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} else {
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session.Flash(w, r, "Your post has been deleted.")
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}
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templates.Redirect(w, fmt.Sprintf("/forum/thread/%d", thread.ID))
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return
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}
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} else {
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// Comment not found - show the Forbidden page anyway.
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templates.ForbiddenPage(w, r)
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return
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}
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} else {
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templates.NotFoundPage(w, r)
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return
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}
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}
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// Submitting the form.
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if r.Method == http.MethodPost {
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// Polls: parse form parameters into a neat list of answers.
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pollExpires, _ = strconv.Atoi(r.FormValue("poll_expires"))
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var distinctPollChoices = map[string]interface{}{}
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for i := 0; i < config.PollMaxAnswers; i++ {
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if value := r.FormValue(fmt.Sprintf("answer%d", i)); value != "" {
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pollOptions = append(pollOptions, value)
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isPoll = len(pollOptions) >= 2
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// Make sure every option is distinct!
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if _, ok := distinctPollChoices[value]; ok {
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session.FlashError(w, r, "Your poll options must all be unique! Duplicate option '%s' seen in your post!", value)
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intent = "preview" // do not continue to submit
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}
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distinctPollChoices[value] = nil
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}
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}
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// If only one poll option, warn about it.
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if len(pollOptions) == 1 {
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session.FlashError(w, r, "Your poll should have at least two choices.")
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intent = "preview" // do not continue to submit
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}
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// Is a photo coming along?
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if forum.PermitPhotos {
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// Removing or replacing?
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if photoIntent == "remove" || photoIntent == "replace" {
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// Remove the attached photo.
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if commentPhoto == nil {
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session.FlashError(w, r, "Couldn't remove photo from post: no photo found!")
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} else {
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photo.Delete(commentPhoto.Filename)
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if err := commentPhoto.Delete(); err != nil {
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session.FlashError(w, r, "Couldn't remove photo from DB: %s", err)
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} else {
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session.Flash(w, r, "Photo attachment %sd from this post.", photoIntent)
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commentPhoto = nil
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}
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}
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}
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// Uploading a new picture?
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if photoIntent == "upload" || photoIntent == "replace" {
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log.Info("Receiving a photo upload for forum post")
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// Get their file upload.
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file, header, err := r.FormFile("file")
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if err != nil {
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session.FlashError(w, r, "Error receiving your file: %s", err)
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templates.Redirect(w, r.URL.Path)
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return
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}
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// Read the file contents.
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log.Debug("Receiving uploaded file (%d bytes): %s", header.Size, header.Filename)
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var buf bytes.Buffer
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io.Copy(&buf, file)
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filename, _, err := photo.UploadPhoto(photo.UploadConfig{
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Extension: filepath.Ext(header.Filename),
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Data: buf.Bytes(),
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})
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if err != nil {
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session.FlashError(w, r, "Error in UploadPhoto: %s", err)
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templates.Redirect(w, r.URL.Path)
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return
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}
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// Create the PhotoComment. If we don't have a Comment ID yet, let it be empty.
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ptmpl := models.CommentPhoto{
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Filename: filename,
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UserID: currentUser.ID,
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}
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if comment != nil {
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ptmpl.CommentID = comment.ID
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}
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// Get the filesize.
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if stat, err := os.Stat(photo.DiskPath(filename)); err == nil {
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ptmpl.Filesize = stat.Size()
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}
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// Create it in DB!
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p, err := models.CreateCommentPhoto(ptmpl)
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if err != nil {
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session.FlashError(w, r, "Couldn't create CommentPhoto in DB: %s", err)
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} else {
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log.Info("New photo! %+v", p)
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}
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commentPhoto = p
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}
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}
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// Default intent is preview unless told to submit.
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if intent == "submit" {
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// A message OR a photo is required.
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if forum.PermitPhotos && message == "" && commentPhoto == nil {
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session.FlashError(w, r, "A message OR photo is required for this post.")
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if thread != nil {
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templates.Redirect(w, fmt.Sprintf("/forum/thread/%d", thread.ID))
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} else if forum != nil {
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templates.Redirect(w, fmt.Sprintf("/f/%s", forum.Fragment))
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} else {
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templates.Redirect(w, "/forum")
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}
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return
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} else if !forum.PermitPhotos && message == "" {
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session.FlashError(w, r, "A message is required for this post.")
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if thread != nil {
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templates.Redirect(w, fmt.Sprintf("/forum/thread/%d", thread.ID))
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} else if forum != nil {
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templates.Redirect(w, fmt.Sprintf("/f/%s", forum.Fragment))
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} else {
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templates.Redirect(w, "/forum")
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}
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return
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}
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// Are we modifying an existing comment?
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if comment != nil {
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comment.Message = message
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// Can we update the thread props?
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if isOriginalComment {
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thread.Pinned = isPinned
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thread.Explicit = isExplicit
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thread.NoReply = isNoReply
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if err := thread.Save(); err != nil {
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session.FlashError(w, r, "Couldn't save thread properties: %s", err)
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}
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}
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if err := comment.Save(); err != nil {
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session.FlashError(w, r, "Couldn't save comment: %s", err)
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} else {
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session.Flash(w, r, "Comment updated!")
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}
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templates.Redirect(w, fmt.Sprintf("/forum/thread/%d", thread.ID))
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return
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}
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// Are we replying to an existing thread?
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if thread != nil {
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if reply, err := thread.Reply(currentUser, message); err != nil {
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session.FlashError(w, r, "Couldn't add reply to thread: %s", err)
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} else {
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session.Flash(w, r, "Reply added to the thread!")
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// If we're attaching a photo, link it to this reply CommentID.
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if commentPhoto != nil {
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commentPhoto.CommentID = reply.ID
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if err := commentPhoto.Save(); err != nil {
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log.Error("Couldn't save forum reply CommentPhoto.CommentID: %s", err)
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}
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}
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// What page number of the thread will this comment appear on?
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// Get the last page of the thread, and if not 1, append the
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// query string - so the notification might go to e.g.
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// "/forum/thread/:id?page=4#p50" to link directly to page 4
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// where comment 50 can be seen.
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var queryString = ""
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if lastPage := thread.Pages(); lastPage > 1 {
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queryString = fmt.Sprintf("?page=%d", lastPage)
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}
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// Notify watchers about this new post.
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for _, userID := range models.GetSubscribers("threads", thread.ID) {
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if userID == currentUser.ID {
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continue
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}
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notif := &models.Notification{
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UserID: userID,
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AboutUser: *currentUser,
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Type: models.NotificationAlsoPosted,
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TableName: "threads",
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TableID: thread.ID,
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Message: message,
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Link: fmt.Sprintf("/forum/thread/%d%s#p%d", thread.ID, queryString, reply.ID),
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}
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if err := models.CreateNotification(notif); err != nil {
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log.Error("Couldn't create thread reply notification for subscriber %d: %s", userID, err)
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}
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}
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// Subscribe the current user to further responses on this thread.
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if _, err := models.SubscribeTo(currentUser, "threads", thread.ID); err != nil {
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log.Error("Couldn't subscribe user %d to forum thread %d: %s", currentUser.ID, thread.ID, err)
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}
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// Redirect the poster to the correct page number too.
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templates.Redirect(w, fmt.Sprintf("/forum/thread/%d%s", thread.ID, queryString))
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return
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}
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// Called on the error case that the post couldn't be created -
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// probably should not happen.
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templates.Redirect(w, fmt.Sprintf("/forum/thread/%d", thread.ID))
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return
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}
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// Create a new thread?
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if thread, err := models.CreateThread(
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currentUser,
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forum.ID,
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title,
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message,
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isPinned,
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isExplicit,
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isNoReply,
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); err != nil {
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session.FlashError(w, r, "Couldn't create thread: %s", err)
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} else {
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session.Flash(w, r, "Thread created!")
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// If we're attaching a photo, link it to this CommentID.
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if commentPhoto != nil {
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commentPhoto.CommentID = thread.CommentID
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if err := commentPhoto.Save(); err != nil {
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log.Error("Couldn't save forum post CommentPhoto.CommentID: %s", err)
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}
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}
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// Are we attaching a poll to this new thread?
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if isPoll {
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log.Info("It's a Poll! Options: %+v", pollOptions)
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poll := models.CreatePoll(pollOptions, pollExpires)
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poll.MultipleChoice = pollMultipleChoice
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if err := poll.Save(); err != nil {
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session.FlashError(w, r, "Error creating poll: %s", err)
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}
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// Attach it to this thread.
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thread.PollID = &poll.ID
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if err := thread.Save(); err != nil {
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log.Error("Couldn't save PollID onto thread! %s", err)
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}
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}
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// Subscribe the current user to responses on this thread.
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if _, err := models.SubscribeTo(currentUser, "threads", thread.ID); err != nil {
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log.Error("Couldn't subscribe user %d to forum thread %d: %s", currentUser.ID, thread.ID, err)
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}
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templates.Redirect(w, fmt.Sprintf("/forum/thread/%d", thread.ID))
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return
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}
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}
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}
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var vars = map[string]interface{}{
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"Forum": forum,
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"Thread": thread,
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"Intent": intent,
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"PostTitle": title,
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"EditCommentID": editCommentID,
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"EditThreadSettings": isOriginalComment,
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"Message": message,
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// Thread settings (for editing the original comment esp.)
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"IsPinned": isPinned,
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"IsExplicit": isExplicit,
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"IsNoReply": isNoReply,
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// Polls
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"PollOptions": pollOptions,
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// Attached photo.
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"CommentPhoto": commentPhoto,
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}
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if err := tmpl.Execute(w, r, vars); err != nil {
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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})
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}
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