crates/api/src/comment/like.rs

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