lemmy/crates/api_crud/src/post/read.rs

114 lines
3.3 KiB
Rust

use actix_web::web::{Data, Json, Query};
use lemmy_api_common::{
context::LemmyContext,
post::{GetPost, GetPostResponse},
utils::{check_private_instance, is_mod_or_admin_opt, mark_post_as_read},
};
use lemmy_db_schema::{
aggregates::structs::{PersonPostAggregates, PersonPostAggregatesForm},
source::{comment::Comment, local_site::LocalSite, post::Post},
traits::Crud,
};
use lemmy_db_views::{
post_view::PostQuery,
structs::{LocalUserView, PostView},
};
use lemmy_db_views_actor::structs::{CommunityModeratorView, CommunityView};
use lemmy_utils::error::{LemmyError, LemmyErrorExt, LemmyErrorType};
#[tracing::instrument(skip(context))]
pub async fn get_post(
data: Query<GetPost>,
context: Data<LemmyContext>,
local_user_view: Option<LocalUserView>,
) -> Result<Json<GetPostResponse>, LemmyError> {
let local_site = LocalSite::read(&mut context.pool()).await?;
check_private_instance(&local_user_view, &local_site)?;
let person_id = local_user_view.as_ref().map(|u| u.person.id);
// I'd prefer fetching the post_view by a comment join, but it adds a lot of boilerplate
let post_id = if let Some(id) = data.id {
id
} else if let Some(comment_id) = data.comment_id {
Comment::read(&mut context.pool(), comment_id)
.await
.with_lemmy_type(LemmyErrorType::CouldntFindPost)?
.post_id
} else {
Err(LemmyErrorType::CouldntFindPost)?
};
// Check to see if the person is a mod or admin, to show deleted / removed
let community_id = Post::read(&mut context.pool(), post_id).await?.community_id;
let is_mod_or_admin = is_mod_or_admin_opt(
&mut context.pool(),
local_user_view.as_ref(),
Some(community_id),
)
.await
.is_ok();
let post_view = PostView::read(&mut context.pool(), post_id, person_id, is_mod_or_admin)
.await
.with_lemmy_type(LemmyErrorType::CouldntFindPost)?;
// Mark the post as read
let post_id = post_view.post.id;
if let Some(person_id) = person_id {
mark_post_as_read(person_id, post_id, &mut context.pool()).await?;
}
// Necessary for the sidebar subscribed
let community_view = CommunityView::read(
&mut context.pool(),
community_id,
person_id,
is_mod_or_admin,
)
.await
.with_lemmy_type(LemmyErrorType::CouldntFindCommunity)?;
// Insert into PersonPostAggregates
// to update the read_comments count
if let Some(person_id) = person_id {
let read_comments = post_view.counts.comments;
let person_post_agg_form = PersonPostAggregatesForm {
person_id,
post_id,
read_comments,
..PersonPostAggregatesForm::default()
};
PersonPostAggregates::upsert(&mut context.pool(), &person_post_agg_form)
.await
.with_lemmy_type(LemmyErrorType::CouldntFindPost)?;
}
let moderators = CommunityModeratorView::for_community(&mut context.pool(), community_id).await?;
// Fetch the cross_posts
let cross_posts = if let Some(url) = &post_view.post.url {
let mut x_posts = PostQuery {
url_search: Some(url.inner().as_str().into()),
..Default::default()
}
.list(&mut context.pool())
.await?;
// Don't return this post as one of the cross_posts
x_posts.retain(|x| x.post.id != post_id);
x_posts
} else {
Vec::new()
};
// Return the jwt
Ok(Json(GetPostResponse {
post_view,
community_view,
moderators,
cross_posts,
}))
}