crates/api_crud/src/comment/create.rs

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