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