crates/api_crud/src/post/read.rs

   1 use crate::PerformCrud;
   2 use actix_web::web::Data;
   3 use lemmy_api_common::{
   4   context::LemmyContext,
   5   post::{GetPost, GetPostResponse},
   6   utils::{check_private_instance, get_local_user_view_from_jwt_opt, mark_post_as_read},
   7 };
   8 use lemmy_db_schema::{
   9   aggregates::structs::{PersonPostAggregates, PersonPostAggregatesForm},
  10   source::{comment::Comment, local_site::LocalSite},
  11   traits::{Crud, DeleteableOrRemoveable},
  12 };
  13 use lemmy_db_views::structs::PostView;
  14 use lemmy_db_views_actor::structs::{CommunityModeratorView, CommunityView};
  15 use lemmy_utils::{error::LemmyError, ConnectionId};
  16
  17 #[async_trait::async_trait(?Send)]
  18 impl PerformCrud for GetPost {
  19   type Response = GetPostResponse;
  20
  21   #[tracing::instrument(skip(context, _websocket_id))]
  22   async fn perform(
  23     &self,
  24     context: &Data<LemmyContext>,
  25     _websocket_id: Option<ConnectionId>,
  26   ) -> Result<GetPostResponse, LemmyError> {
  27     let data: &GetPost = self;
  28     let local_user_view =
  29       get_local_user_view_from_jwt_opt(data.auth.as_ref(), context.pool(), context.secret())
  30         .await?;
  31     let local_site = LocalSite::read(context.pool()).await?;
  32
  33     check_private_instance(&local_user_view, &local_site)?;
  34
  35     let person_id = local_user_view.map(|u| u.person.id);
  36
  37     // I'd prefer fetching the post_view by a comment join, but it adds a lot of boilerplate
  38     let post_id = if let Some(id) = data.id {
  39       id
  40     } else if let Some(comment_id) = data.comment_id {
  41       Comment::read(context.pool(), comment_id)
  42         .await
  43         .map_err(|e| LemmyError::from_error_message(e, "couldnt_find_post"))?
  44         .post_id
  45     } else {
  46       Err(LemmyError::from_message("couldnt_find_post"))?
  47     };
  48
  49     let mut post_view = PostView::read(context.pool(), post_id, person_id)
  50       .await
  51       .map_err(|e| LemmyError::from_error_message(e, "couldnt_find_post"))?;
  52
  53     // Mark the post as read
  54     let post_id = post_view.post.id;
  55     if let Some(person_id) = person_id {
  56       mark_post_as_read(person_id, post_id, context.pool()).await?;
  57     }
  58
  59     // Necessary for the sidebar subscribed
  60     let community_id = post_view.community.id;
  61     let mut community_view = CommunityView::read(context.pool(), community_id, person_id)
  62       .await
  63       .map_err(|e| LemmyError::from_error_message(e, "couldnt_find_community"))?;
  64
  65     // Insert into PersonPostAggregates
  66     // to update the read_comments count
  67     if let Some(person_id) = person_id {
  68       let read_comments = post_view.counts.comments;
  69       let person_post_agg_form = PersonPostAggregatesForm {
  70         person_id,
  71         post_id,
  72         read_comments,
  73         ..PersonPostAggregatesForm::default()
  74       };
  75       PersonPostAggregates::upsert(context.pool(), &person_post_agg_form)
  76         .await
  77         .map_err(|e| LemmyError::from_error_message(e, "couldnt_find_post"))?;
  78     }
  79
  80     // Blank out deleted or removed info for non-logged in users
  81     if person_id.is_none() {
  82       if post_view.post.deleted || post_view.post.removed {
  83         post_view.post = post_view.post.blank_out_deleted_or_removed_info();
  84       }
  85
  86       if community_view.community.deleted || community_view.community.removed {
  87         community_view.community = community_view.community.blank_out_deleted_or_removed_info();
  88       }
  89     }
  90
  91     let moderators = CommunityModeratorView::for_community(context.pool(), community_id).await?;
  92
  93     let online = context.chat_server().get_post_users_online(post_id)?;
  94
  95     // Return the jwt
  96     Ok(GetPostResponse {
  97       post_view,
  98       community_view,
  99       moderators,
 100       online,
 101     })
 102   }
 103 }