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   impls::actor_language::default_post_language,
  20   source::{
  21     actor_language::CommunityLanguage,
  22     comment::{Comment, CommentInsertForm, CommentLike, CommentLikeForm, CommentUpdateForm},
  23     comment_reply::{CommentReply, CommentReplyUpdateForm},
  24     local_site::LocalSite,
  25     person_mention::{PersonMention, PersonMentionUpdateForm},
  26   },
  27   traits::{Crud, Likeable},
  28 };
  29 use lemmy_utils::{
  30   error::{LemmyError, LemmyErrorExt, LemmyErrorType},
  31   utils::{
  32     mention::scrape_text_for_mentions,
  33     slurs::remove_slurs,
  34     validation::is_valid_body_field,
  35   },
  36 };
  37
  38 const MAX_COMMENT_DEPTH_LIMIT: usize = 100;
  39
  40 #[async_trait::async_trait(?Send)]
  41 impl PerformCrud for CreateComment {
  42   type Response = CommentResponse;
  43
  44   #[tracing::instrument(skip(context))]
  45   async fn perform(&self, context: &Data<LemmyContext>) -> Result<CommentResponse, LemmyError> {
  46     let data: &CreateComment = self;
  47     let local_user_view = local_user_view_from_jwt(&data.auth, context).await?;
  48     let local_site = LocalSite::read(&mut context.pool()).await?;
  49
  50     let content_slurs_removed = remove_slurs(
  51       &data.content.clone(),
  52       &local_site_to_slur_regex(&local_site),
  53     );
  54     is_valid_body_field(&Some(content_slurs_removed.clone()), false)?;
  55
  56     // Check for a community ban
  57     let post_id = data.post_id;
  58     let post = get_post(post_id, &mut context.pool()).await?;
  59     let community_id = post.community_id;
  60
  61     check_community_ban(local_user_view.person.id, community_id, &mut context.pool()).await?;
  62     check_community_deleted_or_removed(community_id, &mut context.pool()).await?;
  63     check_post_deleted_or_removed(&post)?;
  64
  65     // Check if post is locked, no new comments
  66     if post.locked {
  67       return Err(LemmyErrorType::Locked)?;
  68     }
  69
  70     // Fetch the parent, if it exists
  71     let parent_opt = if let Some(parent_id) = data.parent_id {
  72       Comment::read(&mut context.pool(), parent_id).await.ok()
  73     } else {
  74       None
  75     };
  76
  77     // If there's a parent_id, check to make sure that comment is in that post
  78     // Strange issue where sometimes the post ID of the parent comment is incorrect
  79     if let Some(parent) = parent_opt.as_ref() {
  80       if parent.post_id != post_id {
  81         return Err(LemmyErrorType::CouldntCreateComment)?;
  82       }
  83       check_comment_depth(parent)?;
  84     }
  85
  86     CommunityLanguage::is_allowed_community_language(
  87       &mut context.pool(),
  88       data.language_id,
  89       community_id,
  90     )
  91     .await?;
  92
  93     // attempt to set default language if none was provided
  94     let language_id = match data.language_id {
  95       Some(lid) => Some(lid),
  96       None => {
  97         default_post_language(
  98           &mut context.pool(),
  99           community_id,
 100           local_user_view.local_user.id,
 101         )
 102         .await?
 103       }
 104     };
 105
 106     let comment_form = CommentInsertForm::builder()
 107       .content(content_slurs_removed.clone())
 108       .post_id(data.post_id)
 109       .creator_id(local_user_view.person.id)
 110       .language_id(language_id)
 111       .build();
 112
 113     // Create the comment
 114     let parent_path = parent_opt.clone().map(|t| t.path);
 115     let inserted_comment =
 116       Comment::create(&mut context.pool(), &comment_form, parent_path.as_ref())
 117         .await
 118         .with_lemmy_type(LemmyErrorType::CouldntCreateComment)?;
 119
 120     // Necessary to update the ap_id
 121     let inserted_comment_id = inserted_comment.id;
 122     let protocol_and_hostname = context.settings().get_protocol_and_hostname();
 123
 124     let apub_id = generate_local_apub_endpoint(
 125       EndpointType::Comment,
 126       &inserted_comment_id.to_string(),
 127       &protocol_and_hostname,
 128     )?;
 129     let updated_comment = Comment::update(
 130       &mut context.pool(),
 131       inserted_comment_id,
 132       &CommentUpdateForm::builder().ap_id(Some(apub_id)).build(),
 133     )
 134     .await
 135     .with_lemmy_type(LemmyErrorType::CouldntCreateComment)?;
 136
 137     // Scan the comment for user mentions, add those rows
 138     let mentions = scrape_text_for_mentions(&content_slurs_removed);
 139     let recipient_ids = send_local_notifs(
 140       mentions,
 141       &updated_comment,
 142       &local_user_view.person,
 143       &post,
 144       true,
 145       context,
 146     )
 147     .await?;
 148
 149     // You like your own comment by default
 150     let like_form = CommentLikeForm {
 151       comment_id: inserted_comment.id,
 152       post_id: post.id,
 153       person_id: local_user_view.person.id,
 154       score: 1,
 155     };
 156
 157     CommentLike::like(&mut context.pool(), &like_form)
 158       .await
 159       .with_lemmy_type(LemmyErrorType::CouldntLikeComment)?;
 160
 161     // If its a reply, mark the parent as read
 162     if let Some(parent) = parent_opt {
 163       let parent_id = parent.id;
 164       let comment_reply = CommentReply::read_by_comment(&mut context.pool(), parent_id).await;
 165       if let Ok(reply) = comment_reply {
 166         CommentReply::update(
 167           &mut context.pool(),
 168           reply.id,
 169           &CommentReplyUpdateForm { read: Some(true) },
 170         )
 171         .await
 172         .with_lemmy_type(LemmyErrorType::CouldntUpdateReplies)?;
 173       }
 174
 175       // If the parent has PersonMentions mark them as read too
 176       let person_id = local_user_view.person.id;
 177       let person_mention =
 178         PersonMention::read_by_comment_and_person(&mut context.pool(), parent_id, person_id).await;
 179       if let Ok(mention) = person_mention {
 180         PersonMention::update(
 181           &mut context.pool(),
 182           mention.id,
 183           &PersonMentionUpdateForm { read: Some(true) },
 184         )
 185         .await
 186         .with_lemmy_type(LemmyErrorType::CouldntUpdatePersonMentions)?;
 187       }
 188     }
 189
 190     build_comment_response(
 191       context,
 192       inserted_comment.id,
 193       Some(local_user_view),
 194       self.form_id.clone(),
 195       recipient_ids,
 196     )
 197     .await
 198   }
 199 }
 200
 201 pub fn check_comment_depth(comment: &Comment) -> Result<(), LemmyError> {
 202   let path = &comment.path.0;
 203   let length = path.split('.').count();
 204   if length > MAX_COMMENT_DEPTH_LIMIT {
 205     Err(LemmyErrorType::MaxCommentDepthReached)?
 206   } else {
 207     Ok(())
 208   }
 209 }