crates/api/src/comment/like.rs

   1 use crate::Perform;
   2 use actix_web::web::Data;
   3 use lemmy_api_common::{
   4   comment::{CommentResponse, CreateCommentLike},
   5   context::LemmyContext,
   6   utils::{check_community_ban, check_downvotes_enabled, local_user_view_from_jwt},
   7   websocket::UserOperation,
   8 };
   9 use lemmy_db_schema::{
  10   newtypes::LocalUserId,
  11   source::{
  12     comment::{CommentLike, CommentLikeForm},
  13     comment_reply::CommentReply,
  14     local_site::LocalSite,
  15   },
  16   traits::Likeable,
  17 };
  18 use lemmy_db_views::structs::{CommentView, LocalUserView};
  19 use lemmy_utils::{error::LemmyError, ConnectionId};
  20
  21 #[async_trait::async_trait(?Send)]
  22 impl Perform for CreateCommentLike {
  23   type Response = CommentResponse;
  24
  25   #[tracing::instrument(skip(context, websocket_id))]
  26   async fn perform(
  27     &self,
  28     context: &Data<LemmyContext>,
  29     websocket_id: Option<ConnectionId>,
  30   ) -> Result<CommentResponse, LemmyError> {
  31     let data: &CreateCommentLike = self;
  32     let local_site = LocalSite::read(context.pool()).await?;
  33     let local_user_view = local_user_view_from_jwt(&data.auth, context).await?;
  34
  35     let mut recipient_ids = Vec::<LocalUserId>::new();
  36
  37     // Don't do a downvote if site has downvotes disabled
  38     check_downvotes_enabled(data.score, &local_site)?;
  39
  40     let comment_id = data.comment_id;
  41     let orig_comment = CommentView::read(context.pool(), comment_id, None).await?;
  42
  43     check_community_ban(
  44       local_user_view.person.id,
  45       orig_comment.community.id,
  46       context.pool(),
  47     )
  48     .await?;
  49
  50     // Add parent poster or commenter to recipients
  51     let comment_reply = CommentReply::read_by_comment(context.pool(), comment_id).await;
  52     if let Ok(reply) = comment_reply {
  53       let recipient_id = reply.recipient_id;
  54       if let Ok(local_recipient) = LocalUserView::read_person(context.pool(), recipient_id).await {
  55         recipient_ids.push(local_recipient.local_user.id);
  56       }
  57     }
  58
  59     let like_form = CommentLikeForm {
  60       comment_id: data.comment_id,
  61       post_id: orig_comment.post.id,
  62       person_id: local_user_view.person.id,
  63       score: data.score,
  64     };
  65
  66     // Remove any likes first
  67     let person_id = local_user_view.person.id;
  68
  69     CommentLike::remove(context.pool(), person_id, comment_id).await?;
  70
  71     // Only add the like if the score isnt 0
  72     let do_add = like_form.score != 0 && (like_form.score == 1 || like_form.score == -1);
  73     if do_add {
  74       CommentLike::like(context.pool(), &like_form)
  75         .await
  76         .map_err(|e| LemmyError::from_error_message(e, "couldnt_like_comment"))?;
  77     }
  78
  79     context
  80       .send_comment_ws_message(
  81         &UserOperation::CreateCommentLike,
  82         data.comment_id,
  83         websocket_id,
  84         None,
  85         Some(local_user_view.person.id),
  86         recipient_ids,
  87       )
  88       .await
  89   }
  90 }