lemmy/crates/api/src/community.rs

915 lines
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use crate::{
check_community_ban,
get_user_from_jwt,
get_user_from_jwt_opt,
is_admin,
is_mod_or_admin,
Perform,
};
use actix_web::web::Data;
use anyhow::Context;
use lemmy_api_structs::{blocking, community::*};
use lemmy_apub::{
generate_apub_endpoint,
generate_followers_url,
generate_inbox_url,
generate_shared_inbox_url,
ActorType,
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CommunityType,
EndpointType,
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UserType,
};
use lemmy_db_queries::{
diesel_option_overwrite_to_url,
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source::{
comment::Comment_,
community::{CommunityModerator_, Community_},
post::Post_,
},
ApubObject,
Bannable,
Crud,
Followable,
Joinable,
ListingType,
SortType,
};
use lemmy_db_schema::{
naive_now,
source::{comment::Comment, community::*, moderator::*, post::Post, site::*, user::User_},
};
use lemmy_db_views::comment_view::CommentQueryBuilder;
use lemmy_db_views_actor::{
community_follower_view::CommunityFollowerView,
community_moderator_view::CommunityModeratorView,
community_view::{CommunityQueryBuilder, CommunityView},
user_view::UserViewSafe,
};
use lemmy_utils::{
apub::generate_actor_keypair,
location_info,
utils::{check_slurs, check_slurs_opt, is_valid_community_name, naive_from_unix},
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ApiError,
ConnectionId,
LemmyError,
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};
use lemmy_websocket::{
messages::{GetCommunityUsersOnline, SendCommunityRoomMessage},
LemmyContext,
UserOperation,
};
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use std::str::FromStr;
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#[async_trait::async_trait(?Send)]
impl Perform for GetCommunity {
type Response = GetCommunityResponse;
async fn perform(
&self,
context: &Data<LemmyContext>,
_websocket_id: Option<ConnectionId>,
) -> Result<GetCommunityResponse, LemmyError> {
let data: &GetCommunity = &self;
let user = get_user_from_jwt_opt(&data.auth, context.pool()).await?;
let user_id = user.map(|u| u.id);
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let community_id = match data.id {
Some(id) => id,
None => {
let name = data.name.to_owned().unwrap_or_else(|| "main".to_string());
match blocking(context.pool(), move |conn| {
Community::read_from_name(conn, &name)
})
.await?
{
Ok(community) => community,
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Err(_e) => return Err(ApiError::err("couldnt_find_community").into()),
}
.id
}
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};
let community_view = match blocking(context.pool(), move |conn| {
CommunityView::read(conn, community_id, user_id)
})
.await?
{
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Ok(community) => community,
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Err(_e) => return Err(ApiError::err("couldnt_find_community").into()),
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};
let moderators: Vec<CommunityModeratorView> = match blocking(context.pool(), move |conn| {
CommunityModeratorView::for_community(conn, community_id)
})
.await?
{
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Ok(moderators) => moderators,
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Err(_e) => return Err(ApiError::err("couldnt_find_community").into()),
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};
let online = context
.chat_server()
.send(GetCommunityUsersOnline { community_id })
.await
.unwrap_or(1);
let res = GetCommunityResponse {
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community_view,
moderators,
online,
};
// Return the jwt
Ok(res)
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}
}
#[async_trait::async_trait(?Send)]
impl Perform for CreateCommunity {
type Response = CommunityResponse;
async fn perform(
&self,
context: &Data<LemmyContext>,
_websocket_id: Option<ConnectionId>,
) -> Result<CommunityResponse, LemmyError> {
let data: &CreateCommunity = &self;
let user = get_user_from_jwt(&data.auth, context.pool()).await?;
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check_slurs(&data.name)?;
check_slurs(&data.title)?;
check_slurs_opt(&data.description)?;
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if !is_valid_community_name(&data.name) {
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return Err(ApiError::err("invalid_community_name").into());
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}
// Double check for duplicate community actor_ids
let community_actor_id = generate_apub_endpoint(EndpointType::Community, &data.name)?;
let actor_id_cloned = community_actor_id.to_owned();
let community_dupe = blocking(context.pool(), move |conn| {
Community::read_from_apub_id(conn, &actor_id_cloned)
})
.await?;
if community_dupe.is_ok() {
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return Err(ApiError::err("community_already_exists").into());
}
// Check to make sure the icon and banners are urls
let icon = diesel_option_overwrite_to_url(&data.icon)?;
let banner = diesel_option_overwrite_to_url(&data.banner)?;
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// When you create a community, make sure the user becomes a moderator and a follower
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let keypair = generate_actor_keypair()?;
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let community_form = CommunityForm {
name: data.name.to_owned(),
title: data.title.to_owned(),
description: data.description.to_owned(),
icon,
banner,
creator_id: user.id,
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removed: None,
deleted: None,
nsfw: data.nsfw,
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updated: None,
actor_id: Some(community_actor_id.to_owned()),
local: true,
private_key: Some(keypair.private_key),
public_key: Some(keypair.public_key),
last_refreshed_at: None,
published: None,
followers_url: Some(generate_followers_url(&community_actor_id)?),
inbox_url: Some(generate_inbox_url(&community_actor_id)?),
shared_inbox_url: Some(Some(generate_shared_inbox_url(&community_actor_id)?)),
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};
let inserted_community = match blocking(context.pool(), move |conn| {
Community::create(conn, &community_form)
})
.await?
{
Ok(community) => community,
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Err(_e) => return Err(ApiError::err("community_already_exists").into()),
};
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// The community creator becomes a moderator
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let community_moderator_form = CommunityModeratorForm {
community_id: inserted_community.id,
user_id: user.id,
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};
let join = move |conn: &'_ _| CommunityModerator::join(conn, &community_moderator_form);
if blocking(context.pool(), join).await?.is_err() {
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return Err(ApiError::err("community_moderator_already_exists").into());
}
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// Follow your own community
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let community_follower_form = CommunityFollowerForm {
community_id: inserted_community.id,
user_id: user.id,
pending: false,
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};
let follow = move |conn: &'_ _| CommunityFollower::follow(conn, &community_follower_form);
if blocking(context.pool(), follow).await?.is_err() {
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return Err(ApiError::err("community_follower_already_exists").into());
}
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let user_id = user.id;
let community_view = blocking(context.pool(), move |conn| {
CommunityView::read(conn, inserted_community.id, Some(user_id))
})
.await??;
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Ok(CommunityResponse { community_view })
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}
}
#[async_trait::async_trait(?Send)]
impl Perform for EditCommunity {
type Response = CommunityResponse;
async fn perform(
&self,
context: &Data<LemmyContext>,
websocket_id: Option<ConnectionId>,
) -> Result<CommunityResponse, LemmyError> {
let data: &EditCommunity = &self;
let user = get_user_from_jwt(&data.auth, context.pool()).await?;
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check_slurs(&data.title)?;
check_slurs_opt(&data.description)?;
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// Verify its a mod (only mods can edit it)
let community_id = data.community_id;
let mods: Vec<i32> = blocking(context.pool(), move |conn| {
CommunityModeratorView::for_community(conn, community_id)
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.map(|v| v.into_iter().map(|m| m.moderator.id).collect())
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})
.await??;
if !mods.contains(&user.id) {
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return Err(ApiError::err("not_a_moderator").into());
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}
let community_id = data.community_id;
let read_community = blocking(context.pool(), move |conn| {
Community::read(conn, community_id)
})
.await??;
let icon = diesel_option_overwrite_to_url(&data.icon)?;
let banner = diesel_option_overwrite_to_url(&data.banner)?;
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let community_form = CommunityForm {
name: read_community.name,
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title: data.title.to_owned(),
description: data.description.to_owned(),
icon,
banner,
creator_id: read_community.creator_id,
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removed: Some(read_community.removed),
deleted: Some(read_community.deleted),
nsfw: data.nsfw,
updated: Some(naive_now()),
actor_id: Some(read_community.actor_id),
local: read_community.local,
private_key: read_community.private_key,
public_key: read_community.public_key,
last_refreshed_at: None,
published: None,
followers_url: None,
inbox_url: None,
shared_inbox_url: None,
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};
let community_id = data.community_id;
match blocking(context.pool(), move |conn| {
Community::update(conn, community_id, &community_form)
})
.await?
{
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Ok(community) => community,
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Err(_e) => return Err(ApiError::err("couldnt_update_community").into()),
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};
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// TODO there needs to be some kind of an apub update
// process for communities and users
let community_id = data.community_id;
let user_id = user.id;
let community_view = blocking(context.pool(), move |conn| {
CommunityView::read(conn, community_id, Some(user_id))
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})
.await??;
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let res = CommunityResponse { community_view };
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send_community_websocket(&res, context, websocket_id, UserOperation::EditCommunity);
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Ok(res)
}
}
#[async_trait::async_trait(?Send)]
impl Perform for DeleteCommunity {
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type Response = CommunityResponse;
async fn perform(
&self,
context: &Data<LemmyContext>,
websocket_id: Option<ConnectionId>,
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) -> Result<CommunityResponse, LemmyError> {
let data: &DeleteCommunity = &self;
let user = get_user_from_jwt(&data.auth, context.pool()).await?;
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// Verify its the creator (only a creator can delete the community)
let community_id = data.community_id;
let read_community = blocking(context.pool(), move |conn| {
Community::read(conn, community_id)
})
.await??;
if read_community.creator_id != user.id {
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return Err(ApiError::err("no_community_edit_allowed").into());
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}
// Do the delete
let community_id = data.community_id;
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let deleted = data.deleted;
let updated_community = match blocking(context.pool(), move |conn| {
Community::update_deleted(conn, community_id, deleted)
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})
.await?
{
Ok(community) => community,
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Err(_e) => return Err(ApiError::err("couldnt_update_community").into()),
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};
// Send apub messages
if deleted {
updated_community.send_delete(context).await?;
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} else {
updated_community.send_undo_delete(context).await?;
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}
let community_id = data.community_id;
let user_id = user.id;
let community_view = blocking(context.pool(), move |conn| {
CommunityView::read(conn, community_id, Some(user_id))
})
.await??;
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let res = CommunityResponse { community_view };
send_community_websocket(&res, context, websocket_id, UserOperation::DeleteCommunity);
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Ok(res)
}
}
#[async_trait::async_trait(?Send)]
impl Perform for RemoveCommunity {
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type Response = CommunityResponse;
async fn perform(
&self,
context: &Data<LemmyContext>,
websocket_id: Option<ConnectionId>,
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) -> Result<CommunityResponse, LemmyError> {
let data: &RemoveCommunity = &self;
let user = get_user_from_jwt(&data.auth, context.pool()).await?;
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// Verify its an admin (only an admin can remove a community)
is_admin(context.pool(), user.id).await?;
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// Do the remove
let community_id = data.community_id;
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let removed = data.removed;
let updated_community = match blocking(context.pool(), move |conn| {
Community::update_removed(conn, community_id, removed)
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})
.await?
{
Ok(community) => community,
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Err(_e) => return Err(ApiError::err("couldnt_update_community").into()),
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};
// Mod tables
let expires = match data.expires {
Some(time) => Some(naive_from_unix(time)),
None => None,
};
let form = ModRemoveCommunityForm {
mod_user_id: user.id,
community_id: data.community_id,
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removed: Some(removed),
reason: data.reason.to_owned(),
expires,
};
blocking(context.pool(), move |conn| {
ModRemoveCommunity::create(conn, &form)
})
.await??;
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// Apub messages
if removed {
updated_community.send_remove(context).await?;
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} else {
updated_community.send_undo_remove(context).await?;
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}
let community_id = data.community_id;
let user_id = user.id;
let community_view = blocking(context.pool(), move |conn| {
CommunityView::read(conn, community_id, Some(user_id))
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})
.await??;
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let res = CommunityResponse { community_view };
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send_community_websocket(&res, context, websocket_id, UserOperation::RemoveCommunity);
Ok(res)
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}
}
#[async_trait::async_trait(?Send)]
impl Perform for ListCommunities {
type Response = ListCommunitiesResponse;
async fn perform(
&self,
context: &Data<LemmyContext>,
_websocket_id: Option<ConnectionId>,
) -> Result<ListCommunitiesResponse, LemmyError> {
let data: &ListCommunities = &self;
let user = get_user_from_jwt_opt(&data.auth, context.pool()).await?;
let user_id = match &user {
Some(user) => Some(user.id),
None => None,
};
let show_nsfw = match &user {
Some(user) => user.show_nsfw,
None => false,
};
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let type_ = ListingType::from_str(&data.type_)?;
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let sort = SortType::from_str(&data.sort)?;
let page = data.page;
let limit = data.limit;
let communities = blocking(context.pool(), move |conn| {
CommunityQueryBuilder::create(conn)
.listing_type(&type_)
.sort(&sort)
.show_nsfw(show_nsfw)
.my_user_id(user_id)
.page(page)
.limit(limit)
.list()
})
.await??;
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// Return the jwt
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Ok(ListCommunitiesResponse { communities })
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}
}
#[async_trait::async_trait(?Send)]
impl Perform for FollowCommunity {
type Response = CommunityResponse;
async fn perform(
&self,
context: &Data<LemmyContext>,
_websocket_id: Option<ConnectionId>,
) -> Result<CommunityResponse, LemmyError> {
let data: &FollowCommunity = &self;
let user = get_user_from_jwt(&data.auth, context.pool()).await?;
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let community_id = data.community_id;
let community = blocking(context.pool(), move |conn| {
Community::read(conn, community_id)
})
.await??;
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let community_follower_form = CommunityFollowerForm {
community_id: data.community_id,
user_id: user.id,
pending: false,
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};
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if community.local {
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if data.follow {
check_community_ban(user.id, community_id, context.pool()).await?;
let follow = move |conn: &'_ _| CommunityFollower::follow(conn, &community_follower_form);
if blocking(context.pool(), follow).await?.is_err() {
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return Err(ApiError::err("community_follower_already_exists").into());
}
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} else {
let unfollow =
move |conn: &'_ _| CommunityFollower::unfollow(conn, &community_follower_form);
if blocking(context.pool(), unfollow).await?.is_err() {
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return Err(ApiError::err("community_follower_already_exists").into());
}
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}
} else if data.follow {
// Dont actually add to the community followers here, because you need
// to wait for the accept
user.send_follow(&community.actor_id(), context).await?;
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} else {
user.send_unfollow(&community.actor_id(), context).await?;
let unfollow = move |conn: &'_ _| CommunityFollower::unfollow(conn, &community_follower_form);
if blocking(context.pool(), unfollow).await?.is_err() {
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return Err(ApiError::err("community_follower_already_exists").into());
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}
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}
let community_id = data.community_id;
let user_id = user.id;
let mut community_view = blocking(context.pool(), move |conn| {
CommunityView::read(conn, community_id, Some(user_id))
})
.await??;
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// TODO: this needs to return a "pending" state, until Accept is received from the remote server
// For now, just assume that remote follows are accepted.
// Otherwise, the subscribed will be null
if !community.local {
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community_view.subscribed = data.follow;
}
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Ok(CommunityResponse { community_view })
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}
}
#[async_trait::async_trait(?Send)]
impl Perform for GetFollowedCommunities {
type Response = GetFollowedCommunitiesResponse;
async fn perform(
&self,
context: &Data<LemmyContext>,
_websocket_id: Option<ConnectionId>,
) -> Result<GetFollowedCommunitiesResponse, LemmyError> {
let data: &GetFollowedCommunities = &self;
let user = get_user_from_jwt(&data.auth, context.pool()).await?;
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let user_id = user.id;
let communities = match blocking(context.pool(), move |conn| {
CommunityFollowerView::for_user(conn, user_id)
})
.await?
{
Ok(communities) => communities,
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_ => return Err(ApiError::err("system_err_login").into()),
};
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// Return the jwt
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Ok(GetFollowedCommunitiesResponse { communities })
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}
}
#[async_trait::async_trait(?Send)]
impl Perform for BanFromCommunity {
type Response = BanFromCommunityResponse;
async fn perform(
&self,
context: &Data<LemmyContext>,
websocket_id: Option<ConnectionId>,
) -> Result<BanFromCommunityResponse, LemmyError> {
let data: &BanFromCommunity = &self;
let user = get_user_from_jwt(&data.auth, context.pool()).await?;
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let community_id = data.community_id;
let banned_user_id = data.user_id;
// Verify that only mods or admins can ban
is_mod_or_admin(context.pool(), user.id, community_id).await?;
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let community_user_ban_form = CommunityUserBanForm {
community_id: data.community_id,
user_id: data.user_id,
};
if data.ban {
let ban = move |conn: &'_ _| CommunityUserBan::ban(conn, &community_user_ban_form);
if blocking(context.pool(), ban).await?.is_err() {
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return Err(ApiError::err("community_user_already_banned").into());
}
// Also unsubscribe them from the community, if they are subscribed
let community_follower_form = CommunityFollowerForm {
community_id: data.community_id,
user_id: banned_user_id,
pending: false,
};
blocking(context.pool(), move |conn: &'_ _| {
CommunityFollower::unfollow(conn, &community_follower_form)
})
.await?
.ok();
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} else {
let unban = move |conn: &'_ _| CommunityUserBan::unban(conn, &community_user_ban_form);
if blocking(context.pool(), unban).await?.is_err() {
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return Err(ApiError::err("community_user_already_banned").into());
}
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}
// Remove/Restore their data if that's desired
if data.remove_data {
// Posts
blocking(context.pool(), move |conn: &'_ _| {
Post::update_removed_for_creator(conn, banned_user_id, Some(community_id), true)
})
.await??;
// Comments
// TODO Diesel doesn't allow updates with joins, so this has to be a loop
let comments = blocking(context.pool(), move |conn| {
CommentQueryBuilder::create(conn)
.creator_id(banned_user_id)
.community_id(community_id)
.limit(std::i64::MAX)
.list()
})
.await??;
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for comment_view in &comments {
let comment_id = comment_view.comment.id;
blocking(context.pool(), move |conn: &'_ _| {
Comment::update_removed(conn, comment_id, true)
})
.await??;
}
}
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// Mod tables
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// TODO eventually do correct expires
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let expires = match data.expires {
Some(time) => Some(naive_from_unix(time)),
None => None,
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};
let form = ModBanFromCommunityForm {
mod_user_id: user.id,
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other_user_id: data.user_id,
community_id: data.community_id,
reason: data.reason.to_owned(),
banned: Some(data.ban),
expires,
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};
blocking(context.pool(), move |conn| {
ModBanFromCommunity::create(conn, &form)
})
.await??;
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let user_id = data.user_id;
let user_view = blocking(context.pool(), move |conn| {
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UserViewSafe::read(conn, user_id)
})
.await??;
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let res = BanFromCommunityResponse {
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user_view,
banned: data.ban,
};
context.chat_server().do_send(SendCommunityRoomMessage {
op: UserOperation::BanFromCommunity,
response: res.clone(),
community_id,
websocket_id,
});
Ok(res)
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}
}
#[async_trait::async_trait(?Send)]
impl Perform for AddModToCommunity {
type Response = AddModToCommunityResponse;
async fn perform(
&self,
context: &Data<LemmyContext>,
websocket_id: Option<ConnectionId>,
) -> Result<AddModToCommunityResponse, LemmyError> {
let data: &AddModToCommunity = &self;
let user = get_user_from_jwt(&data.auth, context.pool()).await?;
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let community_id = data.community_id;
// Verify that only mods or admins can add mod
is_mod_or_admin(context.pool(), user.id, community_id).await?;
// Update in local database
let community_moderator_form = CommunityModeratorForm {
community_id: data.community_id,
user_id: data.user_id,
};
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if data.added {
let join = move |conn: &'_ _| CommunityModerator::join(conn, &community_moderator_form);
if blocking(context.pool(), join).await?.is_err() {
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return Err(ApiError::err("community_moderator_already_exists").into());
}
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} else {
let leave = move |conn: &'_ _| CommunityModerator::leave(conn, &community_moderator_form);
if blocking(context.pool(), leave).await?.is_err() {
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return Err(ApiError::err("community_moderator_already_exists").into());
}
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}
// Mod tables
let form = ModAddCommunityForm {
mod_user_id: user.id,
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other_user_id: data.user_id,
community_id: data.community_id,
removed: Some(!data.added),
};
blocking(context.pool(), move |conn| {
ModAddCommunity::create(conn, &form)
})
.await??;
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// Send to federated instances
let updated_mod_id = data.user_id;
let updated_mod = blocking(context.pool(), move |conn| {
User_::read(conn, updated_mod_id)
})
.await??;
let community = blocking(context.pool(), move |conn| {
Community::read(conn, community_id)
})
.await??;
if data.added {
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community.send_add_mod(&user, updated_mod, context).await?;
} else {
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community
.send_remove_mod(&user, updated_mod, context)
.await?;
}
// Note: in case a remote mod is added, this returns the old moderators list, it will only get
// updated once we receive an activity from the community (like `Announce/Add/Moderator`)
let community_id = data.community_id;
let moderators = blocking(context.pool(), move |conn| {
CommunityModeratorView::for_community(conn, community_id)
})
.await??;
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let res = AddModToCommunityResponse { moderators };
context.chat_server().do_send(SendCommunityRoomMessage {
op: UserOperation::AddModToCommunity,
response: res.clone(),
community_id,
websocket_id,
});
Ok(res)
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}
}
// TODO: we dont do anything for federation here, it should be updated the next time the community
// gets fetched. i hope we can get rid of the community creator role soon.
#[async_trait::async_trait(?Send)]
impl Perform for TransferCommunity {
type Response = GetCommunityResponse;
async fn perform(
&self,
context: &Data<LemmyContext>,
_websocket_id: Option<ConnectionId>,
) -> Result<GetCommunityResponse, LemmyError> {
let data: &TransferCommunity = &self;
let user = get_user_from_jwt(&data.auth, context.pool()).await?;
let community_id = data.community_id;
let read_community = blocking(context.pool(), move |conn| {
Community::read(conn, community_id)
})
.await??;
let site_creator_id = blocking(context.pool(), move |conn| {
Site::read(conn, 1).map(|s| s.creator_id)
})
.await??;
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let mut admins = blocking(context.pool(), move |conn| UserViewSafe::admins(conn)).await??;
// Making sure the creator, if an admin, is at the top
let creator_index = admins
.iter()
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.position(|r| r.user.id == site_creator_id)
.context(location_info!())?;
let creator_user = admins.remove(creator_index);
admins.insert(0, creator_user);
// Make sure user is the creator, or an admin
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if user.id != read_community.creator_id
&& !admins.iter().map(|a| a.user.id).any(|x| x == user.id)
{
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return Err(ApiError::err("not_an_admin").into());
}
let community_id = data.community_id;
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let new_creator = data.user_id;
let update = move |conn: &'_ _| Community::update_creator(conn, community_id, new_creator);
if blocking(context.pool(), update).await?.is_err() {
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return Err(ApiError::err("couldnt_update_community").into());
};
// You also have to re-do the community_moderator table, reordering it.
let community_id = data.community_id;
let mut community_mods = blocking(context.pool(), move |conn| {
CommunityModeratorView::for_community(conn, community_id)
})
.await??;
let creator_index = community_mods
.iter()
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.position(|r| r.moderator.id == data.user_id)
.context(location_info!())?;
let creator_user = community_mods.remove(creator_index);
community_mods.insert(0, creator_user);
let community_id = data.community_id;
blocking(context.pool(), move |conn| {
CommunityModerator::delete_for_community(conn, community_id)
})
.await??;
// TODO: this should probably be a bulk operation
for cmod in &community_mods {
let community_moderator_form = CommunityModeratorForm {
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community_id: cmod.community.id,
user_id: cmod.moderator.id,
};
let join = move |conn: &'_ _| CommunityModerator::join(conn, &community_moderator_form);
if blocking(context.pool(), join).await?.is_err() {
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return Err(ApiError::err("community_moderator_already_exists").into());
}
}
// Mod tables
let form = ModAddCommunityForm {
mod_user_id: user.id,
other_user_id: data.user_id,
community_id: data.community_id,
removed: Some(false),
};
blocking(context.pool(), move |conn| {
ModAddCommunity::create(conn, &form)
})
.await??;
let community_id = data.community_id;
let user_id = user.id;
let community_view = match blocking(context.pool(), move |conn| {
CommunityView::read(conn, community_id, Some(user_id))
})
.await?
{
Ok(community) => community,
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Err(_e) => return Err(ApiError::err("couldnt_find_community").into()),
};
let community_id = data.community_id;
let moderators = match blocking(context.pool(), move |conn| {
CommunityModeratorView::for_community(conn, community_id)
})
.await?
{
Ok(moderators) => moderators,
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Err(_e) => return Err(ApiError::err("couldnt_find_community").into()),
};
// Return the jwt
Ok(GetCommunityResponse {
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community_view,
moderators,
online: 0,
})
}
}
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fn send_community_websocket(
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res: &CommunityResponse,
context: &Data<LemmyContext>,
websocket_id: Option<ConnectionId>,
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op: UserOperation,
) {
// Strip out the user id and subscribed when sending to others
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let mut res_sent = res.clone();
res_sent.community_view.subscribed = false;
context.chat_server().do_send(SendCommunityRoomMessage {
op,
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response: res_sent,
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community_id: res.community_view.community.id,
websocket_id,
});
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}