crates/api_crud/src/comment/create.rs

   1 use crate::PerformCrud;
   2 use actix_web::web::Data;
   3 use lemmy_api_common::{
   4   build_response::{build_comment_response, send_local_notifs},
   5   comment::{CommentResponse, CreateComment},
   6   context::LemmyContext,
   7   utils::{
   8     check_community_ban,
   9     check_community_deleted_or_removed,
  10     check_post_deleted_or_removed,
  11     generate_local_apub_endpoint,
  12     get_post,
  13     local_site_to_slur_regex,
  14     local_user_view_from_jwt,
  15     EndpointType,
  16   },
  17 };
  18 use lemmy_db_schema::{
  19   source::{
  20     actor_language::CommunityLanguage,
  21     comment::{Comment, CommentInsertForm, CommentLike, CommentLikeForm, CommentUpdateForm},
  22     comment_reply::{CommentReply, CommentReplyUpdateForm},
  23     local_site::LocalSite,
  24     person_mention::{PersonMention, PersonMentionUpdateForm},
  25   },
  26   traits::{Crud, Likeable},
  27 };
  28 use lemmy_utils::{
  29   error::{LemmyError, LemmyErrorExt, LemmyErrorType},
  30   utils::{
  31     mention::scrape_text_for_mentions,
  32     slurs::remove_slurs,
  33     validation::is_valid_body_field,
  34   },
  35 };
  36
  37 const MAX_COMMENT_DEPTH_LIMIT: usize = 100;
  38
  39 #[async_trait::async_trait(?Send)]
  40 impl PerformCrud for CreateComment {
  41   type Response = CommentResponse;
  42
  43   #[tracing::instrument(skip(context))]
  44   async fn perform(&self, context: &Data<LemmyContext>) -> Result<CommentResponse, LemmyError> {
  45     let data: &CreateComment = self;
  46     let local_user_view = local_user_view_from_jwt(&data.auth, context).await?;
  47     let local_site = LocalSite::read(&mut context.pool()).await?;
  48
  49     let content_slurs_removed = remove_slurs(
  50       &data.content.clone(),
  51       &local_site_to_slur_regex(&local_site),
  52     );
  53     is_valid_body_field(&Some(content_slurs_removed.clone()), false)?;
  54
  55     // Check for a community ban
  56     let post_id = data.post_id;
  57     let post = get_post(post_id, &mut context.pool()).await?;
  58     let community_id = post.community_id;
  59
  60     check_community_ban(local_user_view.person.id, community_id, &mut context.pool()).await?;
  61     check_community_deleted_or_removed(community_id, &mut context.pool()).await?;
  62     check_post_deleted_or_removed(&post)?;
  63
  64     // Check if post is locked, no new comments
  65     if post.locked {
  66       return Err(LemmyErrorType::Locked)?;
  67     }
  68
  69     // Fetch the parent, if it exists
  70     let parent_opt = if let Some(parent_id) = data.parent_id {
  71       Comment::read(&mut context.pool(), parent_id).await.ok()
  72     } else {
  73       None
  74     };
  75
  76     // If there's a parent_id, check to make sure that comment is in that post
  77     // Strange issue where sometimes the post ID of the parent comment is incorrect
  78     if let Some(parent) = parent_opt.as_ref() {
  79       if parent.post_id != post_id {
  80         return Err(LemmyErrorType::CouldntCreateComment)?;
  81       }
  82       check_comment_depth(parent)?;
  83     }
  84
  85     // if no language is set, copy language from parent post/comment
  86     let parent_language = parent_opt
  87       .as_ref()
  88       .map(|p| p.language_id)
  89       .unwrap_or(post.language_id);
  90     let language_id = data.language_id.unwrap_or(parent_language);
  91
  92     CommunityLanguage::is_allowed_community_language(
  93       &mut context.pool(),
  94       Some(language_id),
  95       community_id,
  96     )
  97     .await?;
  98
  99     let comment_form = CommentInsertForm::builder()
 100       .content(content_slurs_removed.clone())
 101       .post_id(data.post_id)
 102       .creator_id(local_user_view.person.id)
 103       .language_id(Some(language_id))
 104       .build();
 105
 106     // Create the comment
 107     let parent_path = parent_opt.clone().map(|t| t.path);
 108     let inserted_comment =
 109       Comment::create(&mut context.pool(), &comment_form, parent_path.as_ref())
 110         .await
 111         .with_lemmy_type(LemmyErrorType::CouldntCreateComment)?;
 112
 113     // Necessary to update the ap_id
 114     let inserted_comment_id = inserted_comment.id;
 115     let protocol_and_hostname = context.settings().get_protocol_and_hostname();
 116
 117     let apub_id = generate_local_apub_endpoint(
 118       EndpointType::Comment,
 119       &inserted_comment_id.to_string(),
 120       &protocol_and_hostname,
 121     )?;
 122     let updated_comment = Comment::update(
 123       &mut context.pool(),
 124       inserted_comment_id,
 125       &CommentUpdateForm::builder().ap_id(Some(apub_id)).build(),
 126     )
 127     .await
 128     .with_lemmy_type(LemmyErrorType::CouldntCreateComment)?;
 129
 130     // Scan the comment for user mentions, add those rows
 131     let mentions = scrape_text_for_mentions(&content_slurs_removed);
 132     let recipient_ids = send_local_notifs(
 133       mentions,
 134       &updated_comment,
 135       &local_user_view.person,
 136       &post,
 137       true,
 138       context,
 139     )
 140     .await?;
 141
 142     // You like your own comment by default
 143     let like_form = CommentLikeForm {
 144       comment_id: inserted_comment.id,
 145       post_id: post.id,
 146       person_id: local_user_view.person.id,
 147       score: 1,
 148     };
 149
 150     CommentLike::like(&mut context.pool(), &like_form)
 151       .await
 152       .with_lemmy_type(LemmyErrorType::CouldntLikeComment)?;
 153
 154     // If its a reply, mark the parent as read
 155     if let Some(parent) = parent_opt {
 156       let parent_id = parent.id;
 157       let comment_reply = CommentReply::read_by_comment(&mut context.pool(), parent_id).await;
 158       if let Ok(reply) = comment_reply {
 159         CommentReply::update(
 160           &mut context.pool(),
 161           reply.id,
 162           &CommentReplyUpdateForm { read: Some(true) },
 163         )
 164         .await
 165         .with_lemmy_type(LemmyErrorType::CouldntUpdateReplies)?;
 166       }
 167
 168       // If the parent has PersonMentions mark them as read too
 169       let person_id = local_user_view.person.id;
 170       let person_mention =
 171         PersonMention::read_by_comment_and_person(&mut context.pool(), parent_id, person_id).await;
 172       if let Ok(mention) = person_mention {
 173         PersonMention::update(
 174           &mut context.pool(),
 175           mention.id,
 176           &PersonMentionUpdateForm { read: Some(true) },
 177         )
 178         .await
 179         .with_lemmy_type(LemmyErrorType::CouldntUpdatePersonMentions)?;
 180       }
 181     }
 182
 183     build_comment_response(
 184       context,
 185       inserted_comment.id,
 186       Some(local_user_view),
 187       self.form_id.clone(),
 188       recipient_ids,
 189     )
 190     .await
 191   }
 192 }
 193
 194 pub fn check_comment_depth(comment: &Comment) -> Result<(), LemmyError> {
 195   let path = &comment.path.0;
 196   let length = path.split('.').count();
 197   if length > MAX_COMMENT_DEPTH_LIMIT {
 198     Err(LemmyErrorType::MaxCommentDepthReached)?
 199   } else {
 200     Ok(())
 201   }
 202 }