crates/api/src/post/like.rs

   1 use crate::Perform;
   2 use actix_web::web::Data;
   3 use lemmy_api_common::{
   4   build_response::build_post_response,
   5   context::LemmyContext,
   6   post::{CreatePostLike, PostResponse},
   7   utils::{
   8     check_community_ban,
   9     check_community_deleted_or_removed,
  10     check_downvotes_enabled,
  11     local_user_view_from_jwt,
  12     mark_post_as_read,
  13   },
  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, LemmyErrorExt, LemmyErrorType};
  23
  24 #[async_trait::async_trait(?Send)]
  25 impl Perform for CreatePostLike {
  26   type Response = PostResponse;
  27
  28   #[tracing::instrument(skip(context))]
  29   async fn perform(&self, context: &Data<LemmyContext>) -> Result<PostResponse, LemmyError> {
  30     let data: &CreatePostLike = self;
  31     let local_user_view = local_user_view_from_jwt(&data.auth, context).await?;
  32     let local_site = LocalSite::read(&mut context.pool()).await?;
  33
  34     // Don't do a downvote if site has downvotes disabled
  35     check_downvotes_enabled(data.score, &local_site)?;
  36
  37     // Check for a community ban
  38     let post_id = data.post_id;
  39     let post = Post::read(&mut context.pool(), post_id).await?;
  40
  41     check_community_ban(
  42       local_user_view.person.id,
  43       post.community_id,
  44       &mut context.pool(),
  45     )
  46     .await?;
  47     check_community_deleted_or_removed(post.community_id, &mut 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(&mut 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       PostLike::like(&mut context.pool(), &like_form)
  64         .await
  65         .with_lemmy_type(LemmyErrorType::CouldntLikePost)?;
  66     }
  67
  68     // Mark the post as read
  69     mark_post_as_read(person_id, post_id, &mut context.pool()).await?;
  70
  71     build_post_response(
  72       context,
  73       post.community_id,
  74       local_user_view.person.id,
  75       post_id,
  76     )
  77     .await
  78   }
  79 }