lemmy/crates/apub/src/api/list_posts.rs

use crate::{
  api::listing_type_with_default,
  fetcher::resolve_actor_identifier,
  objects::community::ApubCommunity,
};
use activitypub_federation::config::Data;
use actix_web::web::{Json, Query};
use lemmy_api_common::{
  context::LemmyContext,
  post::{GetPosts, GetPostsResponse},
  utils::{check_private_instance, local_user_view_from_jwt_opt},
};
use lemmy_db_schema::source::{community::Community, local_site::LocalSite};
use lemmy_db_views::post_view::PostQuery;
use lemmy_utils::error::{LemmyError, LemmyErrorExt, LemmyErrorType};

#[tracing::instrument(skip(context))]
pub async fn list_posts(
  data: Query<GetPosts>,
  context: Data<LemmyContext>,
) -> Result<Json<GetPostsResponse>, LemmyError> {
  let local_user_view = local_user_view_from_jwt_opt(data.auth.as_ref(), &context).await;
  let local_site = LocalSite::read(&mut context.pool()).await?;

  check_private_instance(&local_user_view, &local_site)?;

  let sort = data.sort;

  let page = data.page;
  let limit = data.limit;
  let community_id = if let Some(name) = &data.community_name {
    Some(resolve_actor_identifier::<ApubCommunity, Community>(name, &context, &None, true).await?)
      .map(|c| c.id)
  } else {
    data.community_id
  };
  let saved_only = data.saved_only.unwrap_or_default();

  let liked_only = data.liked_only.unwrap_or_default();
  let disliked_only = data.disliked_only.unwrap_or_default();
  if liked_only && disliked_only {
    return Err(LemmyError::from(LemmyErrorType::ContradictingFilters));
  }

  let moderator_view = data.moderator_view.unwrap_or_default();

  let listing_type = Some(listing_type_with_default(
    data.type_,
    &local_site,
    community_id,
  )?);

  let posts = PostQuery {
    local_user: local_user_view.as_ref(),
    listing_type,
    sort,
    community_id,
    saved_only,
    liked_only,
    disliked_only,
    moderator_view,
    page,
    limit,
    ..Default::default()
  }
  .list(&mut context.pool())
  .await
  .with_lemmy_type(LemmyErrorType::CouldntGetPosts)?;

  Ok(Json(GetPostsResponse { posts }))
}