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(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(context.pool(), comment_id, None).await?;
  38
  39     check_community_ban(
  40       local_user_view.person.id,
  41       orig_comment.community.id,
  42       context.pool(),
  43     )
  44     .await?;
  45
  46     // Add parent poster or commenter to recipients
  47     let comment_reply = CommentReply::read_by_comment(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) = LocalUserView::read_person(context.pool(), recipient_id).await {
  51         recipient_ids.push(local_recipient.local_user.id);
  52       }
  53     }
  54
  55     let like_form = CommentLikeForm {
  56       comment_id: data.comment_id,
  57       post_id: orig_comment.post.id,
  58       person_id: local_user_view.person.id,
  59       score: data.score,
  60     };
  61
  62     // Remove any likes first
  63     let person_id = local_user_view.person.id;
  64
  65     CommentLike::remove(context.pool(), person_id, comment_id).await?;
  66
  67     // Only add the like if the score isnt 0
  68     let do_add = like_form.score != 0 && (like_form.score == 1 || like_form.score == -1);
  69     if do_add {
  70       CommentLike::like(context.pool(), &like_form)
  71         .await
  72         .with_lemmy_type(LemmyErrorType::CouldntLikeComment)?;
  73     }
  74
  75     build_comment_response(
  76       context,
  77       comment_id,
  78       Some(local_user_view),
  79       None,
  80       recipient_ids,
  81     )
  82     .await
  83   }
  84 }