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

93 lines
2.6 KiB
Rust

use crate::{
api::{listing_type_with_default, sort_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,
};
use lemmy_db_schema::source::community::Community;
use lemmy_db_views::{
post_view::PostQuery,
structs::{LocalUserView, PaginationCursor, SiteView},
};
use lemmy_utils::error::{LemmyError, LemmyErrorExt, LemmyErrorType, LemmyResult};
#[tracing::instrument(skip(context))]
pub async fn list_posts(
data: Query<GetPosts>,
context: Data<LemmyContext>,
local_user_view: Option<LocalUserView>,
) -> LemmyResult<Json<GetPostsResponse>> {
let local_site = SiteView::read_local(&mut context.pool()).await?;
check_private_instance(&local_user_view, &local_site.local_site)?;
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, &local_user_view, true)
.await?,
)
.map(|c| c.id)
} else {
data.community_id
};
let saved_only = data.saved_only.unwrap_or_default();
let show_hidden = data.show_hidden.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 local_user_ref = local_user_view.as_ref().map(|u| &u.local_user);
let listing_type = Some(listing_type_with_default(
data.type_,
local_user_ref,
&local_site.local_site,
community_id,
));
let sort = Some(sort_type_with_default(
data.sort,
local_user_ref,
&local_site.local_site,
));
// parse pagination token
let page_after = if let Some(pa) = &data.page_cursor {
Some(pa.read(&mut context.pool()).await?)
} else {
None
};
let posts = PostQuery {
local_user: local_user_view.as_ref(),
listing_type,
sort,
community_id,
saved_only,
liked_only,
disliked_only,
page,
page_after,
limit,
show_hidden,
..Default::default()
}
.list(&local_site.site, &mut context.pool())
.await
.with_lemmy_type(LemmyErrorType::CouldntGetPosts)?;
// if this page wasn't empty, then there is a next page after the last post on this page
let next_page = posts.last().map(PaginationCursor::after_post);
Ok(Json(GetPostsResponse { posts, next_page }))
}