crates/api/src/post/like.rs

   1 use crate::Perform;
   2 use actix_web::web::Data;
   3 use lemmy_api_common::{
   4   context::LemmyContext,
   5   post::{CreatePostLike, PostResponse},
   6   utils::{
   7     check_community_ban,
   8     check_community_deleted_or_removed,
   9     check_downvotes_enabled,
  10     get_local_user_view_from_jwt,
  11     mark_post_as_read,
  12   },
  13   websocket::UserOperation,
  14 };
  15 use lemmy_db_schema::{
  16   source::{
  17     local_site::LocalSite,
  18     post::{Post, PostLike, PostLikeForm},
  19   },
  20   traits::{Crud, Likeable},
  21 };
  22 use lemmy_utils::{error::LemmyError, ConnectionId};
  23
  24 #[async_trait::async_trait(?Send)]
  25 impl Perform for CreatePostLike {
  26   type Response = PostResponse;
  27
  28   #[tracing::instrument(skip(context, websocket_id))]
  29   async fn perform(
  30     &self,
  31     context: &Data<LemmyContext>,
  32     websocket_id: Option<ConnectionId>,
  33   ) -> Result<PostResponse, LemmyError> {
  34     let data: &CreatePostLike = self;
  35     let local_user_view =
  36       get_local_user_view_from_jwt(&data.auth, context.pool(), context.secret()).await?;
  37     let local_site = LocalSite::read(context.pool()).await?;
  38
  39     // Don't do a downvote if site has downvotes disabled
  40     check_downvotes_enabled(data.score, &local_site)?;
  41
  42     // Check for a community ban
  43     let post_id = data.post_id;
  44     let post = Post::read(context.pool(), post_id).await?;
  45
  46     check_community_ban(local_user_view.person.id, post.community_id, context.pool()).await?;
  47     check_community_deleted_or_removed(post.community_id, context.pool()).await?;
  48
  49     let like_form = PostLikeForm {
  50       post_id: data.post_id,
  51       person_id: local_user_view.person.id,
  52       score: data.score,
  53     };
  54
  55     // Remove any likes first
  56     let person_id = local_user_view.person.id;
  57
  58     PostLike::remove(context.pool(), person_id, post_id).await?;
  59
  60     // Only add the like if the score isnt 0
  61     let do_add = like_form.score != 0 && (like_form.score == 1 || like_form.score == -1);
  62     if do_add {
  63       let like_form2 = like_form.clone();
  64       PostLike::like(context.pool(), &like_form2)
  65         .await
  66         .map_err(|e| LemmyError::from_error_message(e, "couldnt_like_post"))?;
  67     }
  68
  69     // Mark the post as read
  70     mark_post_as_read(person_id, post_id, context.pool()).await?;
  71
  72     context
  73       .send_post_ws_message(
  74         &UserOperation::CreatePostLike,
  75         data.post_id,
  76         websocket_id,
  77         Some(local_user_view.person.id),
  78       )
  79       .await
  80   }
  81 }