crates/api/src/post/like.rs

   1 use activitypub_federation::config::Data;
   2 use actix_web::web::Json;
   3 use lemmy_api_common::{
   4   build_response::build_post_response,
   5   context::LemmyContext,
   6   post::{CreatePostLike, PostResponse},
   7   send_activity::{ActivityChannel, SendActivityData},
   8   utils::{
   9     check_community_ban,
  10     check_community_deleted_or_removed,
  11     check_downvotes_enabled,
  12     local_user_view_from_jwt,
  13     mark_post_as_read,
  14   },
  15 };
  16 use lemmy_db_schema::{
  17   source::{
  18     community::Community,
  19     local_site::LocalSite,
  20     post::{Post, PostLike, PostLikeForm},
  21   },
  22   traits::{Crud, Likeable},
  23 };
  24 use lemmy_utils::error::{LemmyError, LemmyErrorExt, LemmyErrorType};
  25 use std::ops::Deref;
  26
  27 #[tracing::instrument(skip(context))]
  28 pub async fn like_post(
  29   data: Json<CreatePostLike>,
  30   context: Data<LemmyContext>,
  31 ) -> Result<Json<PostResponse>, LemmyError> {
  32   let local_user_view = local_user_view_from_jwt(&data.auth, &context).await?;
  33   let local_site = LocalSite::read(&mut context.pool()).await?;
  34
  35   // Don't do a downvote if site has downvotes disabled
  36   check_downvotes_enabled(data.score, &local_site)?;
  37
  38   // Check for a community ban
  39   let post_id = data.post_id;
  40   let post = Post::read(&mut context.pool(), post_id).await?;
  41
  42   check_community_ban(
  43     local_user_view.person.id,
  44     post.community_id,
  45     &mut context.pool(),
  46   )
  47   .await?;
  48   check_community_deleted_or_removed(post.community_id, &mut context.pool()).await?;
  49
  50   let like_form = PostLikeForm {
  51     post_id: data.post_id,
  52     person_id: local_user_view.person.id,
  53     score: data.score,
  54   };
  55
  56   // Remove any likes first
  57   let person_id = local_user_view.person.id;
  58
  59   PostLike::remove(&mut context.pool(), person_id, post_id).await?;
  60
  61   // Only add the like if the score isnt 0
  62   let do_add = like_form.score != 0 && (like_form.score == 1 || like_form.score == -1);
  63   if do_add {
  64     PostLike::like(&mut context.pool(), &like_form)
  65       .await
  66       .with_lemmy_type(LemmyErrorType::CouldntLikePost)?;
  67   }
  68
  69   // Mark the post as read
  70   mark_post_as_read(person_id, post_id, &mut context.pool()).await?;
  71
  72   ActivityChannel::submit_activity(
  73     SendActivityData::LikePostOrComment(
  74       post.ap_id,
  75       local_user_view.person.clone(),
  76       Community::read(&mut context.pool(), post.community_id).await?,
  77       data.score,
  78     ),
  79     &context,
  80   )
  81   .await?;
  82
  83   build_post_response(
  84     context.deref(),
  85     post.community_id,
  86     local_user_view.person.id,
  87     post_id,
  88   )
  89   .await
  90 }