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     sanitize_html,
  16     EndpointType,
  17   },
  18 };
  19 use lemmy_db_schema::{
  20   impls::actor_language::default_post_language,
  21   source::{
  22     actor_language::CommunityLanguage,
  23     comment::{Comment, CommentInsertForm, CommentLike, CommentLikeForm, CommentUpdateForm},
  24     comment_reply::{CommentReply, CommentReplyUpdateForm},
  25     local_site::LocalSite,
  26     person_mention::{PersonMention, PersonMentionUpdateForm},
  27   },
  28   traits::{Crud, Likeable},
  29 };
  30 use lemmy_utils::{
  31   error::{LemmyError, LemmyErrorExt, LemmyErrorType},
  32   utils::{
  33     mention::scrape_text_for_mentions,
  34     slurs::remove_slurs,
  35     validation::is_valid_body_field,
  36   },
  37 };
  38
  39 const MAX_COMMENT_DEPTH_LIMIT: usize = 100;
  40
  41 #[async_trait::async_trait(?Send)]
  42 impl PerformCrud for CreateComment {
  43   type Response = CommentResponse;
  44
  45   #[tracing::instrument(skip(context))]
  46   async fn perform(&self, context: &Data<LemmyContext>) -> Result<CommentResponse, LemmyError> {
  47     let data: &CreateComment = self;
  48     let local_user_view = local_user_view_from_jwt(&data.auth, context).await?;
  49     let local_site = LocalSite::read(&mut context.pool()).await?;
  50
  51     let content = remove_slurs(
  52       &data.content.clone(),
  53       &local_site_to_slur_regex(&local_site),
  54     );
  55     is_valid_body_field(&Some(content.clone()), false)?;
  56     let content = sanitize_html(&content);
  57
  58     // Check for a community ban
  59     let post_id = data.post_id;
  60     let post = get_post(post_id, &mut context.pool()).await?;
  61     let community_id = post.community_id;
  62
  63     check_community_ban(local_user_view.person.id, community_id, &mut context.pool()).await?;
  64     check_community_deleted_or_removed(community_id, &mut context.pool()).await?;
  65     check_post_deleted_or_removed(&post)?;
  66
  67     // Check if post is locked, no new comments
  68     if post.locked {
  69       return Err(LemmyErrorType::Locked)?;
  70     }
  71
  72     // Fetch the parent, if it exists
  73     let parent_opt = if let Some(parent_id) = data.parent_id {
  74       Comment::read(&mut context.pool(), parent_id).await.ok()
  75     } else {
  76       None
  77     };
  78
  79     // If there's a parent_id, check to make sure that comment is in that post
  80     // Strange issue where sometimes the post ID of the parent comment is incorrect
  81     if let Some(parent) = parent_opt.as_ref() {
  82       if parent.post_id != post_id {
  83         return Err(LemmyErrorType::CouldntCreateComment)?;
  84       }
  85       check_comment_depth(parent)?;
  86     }
  87
  88     CommunityLanguage::is_allowed_community_language(
  89       &mut context.pool(),
  90       data.language_id,
  91       community_id,
  92     )
  93     .await?;
  94
  95     // attempt to set default language if none was provided
  96     let language_id = match data.language_id {
  97       Some(lid) => Some(lid),
  98       None => {
  99         default_post_language(
 100           &mut context.pool(),
 101           community_id,
 102           local_user_view.local_user.id,
 103         )
 104         .await?
 105       }
 106     };
 107
 108     let comment_form = CommentInsertForm::builder()
 109       .content(content.clone())
 110       .post_id(data.post_id)
 111       .creator_id(local_user_view.person.id)
 112       .language_id(language_id)
 113       .build();
 114
 115     // Create the comment
 116     let parent_path = parent_opt.clone().map(|t| t.path);
 117     let inserted_comment =
 118       Comment::create(&mut context.pool(), &comment_form, parent_path.as_ref())
 119         .await
 120         .with_lemmy_type(LemmyErrorType::CouldntCreateComment)?;
 121
 122     // Necessary to update the ap_id
 123     let inserted_comment_id = inserted_comment.id;
 124     let protocol_and_hostname = context.settings().get_protocol_and_hostname();
 125
 126     let apub_id = generate_local_apub_endpoint(
 127       EndpointType::Comment,
 128       &inserted_comment_id.to_string(),
 129       &protocol_and_hostname,
 130     )?;
 131     let updated_comment = Comment::update(
 132       &mut context.pool(),
 133       inserted_comment_id,
 134       &CommentUpdateForm::builder().ap_id(Some(apub_id)).build(),
 135     )
 136     .await
 137     .with_lemmy_type(LemmyErrorType::CouldntCreateComment)?;
 138
 139     // Scan the comment for user mentions, add those rows
 140     let mentions = scrape_text_for_mentions(&content);
 141     let recipient_ids = send_local_notifs(
 142       mentions,
 143       &updated_comment,
 144       &local_user_view.person,
 145       &post,
 146       true,
 147       context,
 148     )
 149     .await?;
 150
 151     // You like your own comment by default
 152     let like_form = CommentLikeForm {
 153       comment_id: inserted_comment.id,
 154       post_id: post.id,
 155       person_id: local_user_view.person.id,
 156       score: 1,
 157     };
 158
 159     CommentLike::like(&mut context.pool(), &like_form)
 160       .await
 161       .with_lemmy_type(LemmyErrorType::CouldntLikeComment)?;
 162
 163     // If its a reply, mark the parent as read
 164     if let Some(parent) = parent_opt {
 165       let parent_id = parent.id;
 166       let comment_reply = CommentReply::read_by_comment(&mut context.pool(), parent_id).await;
 167       if let Ok(reply) = comment_reply {
 168         CommentReply::update(
 169           &mut context.pool(),
 170           reply.id,
 171           &CommentReplyUpdateForm { read: Some(true) },
 172         )
 173         .await
 174         .with_lemmy_type(LemmyErrorType::CouldntUpdateReplies)?;
 175       }
 176
 177       // If the parent has PersonMentions mark them as read too
 178       let person_id = local_user_view.person.id;
 179       let person_mention =
 180         PersonMention::read_by_comment_and_person(&mut context.pool(), parent_id, person_id).await;
 181       if let Ok(mention) = person_mention {
 182         PersonMention::update(
 183           &mut context.pool(),
 184           mention.id,
 185           &PersonMentionUpdateForm { read: Some(true) },
 186         )
 187         .await
 188         .with_lemmy_type(LemmyErrorType::CouldntUpdatePersonMentions)?;
 189       }
 190     }
 191
 192     build_comment_response(
 193       context,
 194       inserted_comment.id,
 195       Some(local_user_view),
 196       self.form_id.clone(),
 197       recipient_ids,
 198     )
 199     .await
 200   }
 201 }
 202
 203 pub fn check_comment_depth(comment: &Comment) -> Result<(), LemmyError> {
 204   let path = &comment.path.0;
 205   let length = path.split('.').count();
 206   if length > MAX_COMMENT_DEPTH_LIMIT {
 207     Err(LemmyErrorType::MaxCommentDepthReached)?
 208   } else {
 209     Ok(())
 210   }
 211 }