lemmy/crates/api/src/community.rs

524 lines
16 KiB
Rust

use crate::Perform;
use actix_web::web::Data;
use anyhow::Context;
use lemmy_api_common::{
blocking,
check_community_ban,
check_community_deleted_or_removed,
community::*,
get_local_user_view_from_jwt,
is_mod_or_admin,
remove_user_data_in_community,
};
use lemmy_apub::{
activities::block::SiteOrCommunity,
objects::{community::ApubCommunity, person::ApubPerson},
protocol::activities::{
block::{block_user::BlockUser, undo_block_user::UndoBlockUser},
community::{add_mod::AddMod, remove_mod::RemoveMod},
following::{follow::FollowCommunity as FollowCommunityApub, undo_follow::UndoFollowCommunity},
},
};
use lemmy_db_schema::{
source::{
community::{
Community,
CommunityFollower,
CommunityFollowerForm,
CommunityModerator,
CommunityModeratorForm,
CommunityPersonBan,
CommunityPersonBanForm,
},
community_block::{CommunityBlock, CommunityBlockForm},
moderator::{
ModAddCommunity,
ModAddCommunityForm,
ModBanFromCommunity,
ModBanFromCommunityForm,
ModTransferCommunity,
ModTransferCommunityForm,
},
person::Person,
},
traits::{Bannable, Blockable, Crud, Followable, Joinable},
};
use lemmy_db_views_actor::{
community_moderator_view::CommunityModeratorView,
community_view::CommunityView,
person_view::PersonViewSafe,
};
use lemmy_utils::{location_info, utils::naive_from_unix, ConnectionId, LemmyError};
use lemmy_websocket::{messages::SendCommunityRoomMessage, LemmyContext, UserOperation};
#[async_trait::async_trait(?Send)]
impl Perform for FollowCommunity {
type Response = CommunityResponse;
#[tracing::instrument(skip(context, _websocket_id))]
async fn perform(
&self,
context: &Data<LemmyContext>,
_websocket_id: Option<ConnectionId>,
) -> Result<CommunityResponse, LemmyError> {
let data: &FollowCommunity = self;
let local_user_view =
get_local_user_view_from_jwt(&data.auth, context.pool(), context.secret()).await?;
let community_id = data.community_id;
let community: ApubCommunity = blocking(context.pool(), move |conn| {
Community::read(conn, community_id)
})
.await??
.into();
let community_follower_form = CommunityFollowerForm {
community_id: data.community_id,
person_id: local_user_view.person.id,
pending: false,
};
if community.local {
if data.follow {
check_community_ban(local_user_view.person.id, community_id, context.pool()).await?;
check_community_deleted_or_removed(community_id, context.pool()).await?;
let follow = move |conn: &'_ _| CommunityFollower::follow(conn, &community_follower_form);
blocking(context.pool(), follow)
.await?
.map_err(LemmyError::from)
.map_err(|e| e.with_message("community_follower_already_exists"))?;
} else {
let unfollow =
move |conn: &'_ _| CommunityFollower::unfollow(conn, &community_follower_form);
blocking(context.pool(), unfollow)
.await?
.map_err(LemmyError::from)
.map_err(|e| e.with_message("community_follower_already_exists"))?;
}
} else if data.follow {
// Dont actually add to the community followers here, because you need
// to wait for the accept
FollowCommunityApub::send(&local_user_view.person.clone().into(), &community, context)
.await?;
} else {
UndoFollowCommunity::send(&local_user_view.person.clone().into(), &community, context)
.await?;
let unfollow = move |conn: &'_ _| CommunityFollower::unfollow(conn, &community_follower_form);
blocking(context.pool(), unfollow)
.await?
.map_err(LemmyError::from)
.map_err(|e| e.with_message("community_follower_already_exists"))?;
}
let community_id = data.community_id;
let person_id = local_user_view.person.id;
let mut community_view = blocking(context.pool(), move |conn| {
CommunityView::read(conn, community_id, Some(person_id))
})
.await??;
// 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 {
community_view.subscribed = data.follow;
}
Ok(CommunityResponse { community_view })
}
}
#[async_trait::async_trait(?Send)]
impl Perform for BlockCommunity {
type Response = BlockCommunityResponse;
#[tracing::instrument(skip(context, _websocket_id))]
async fn perform(
&self,
context: &Data<LemmyContext>,
_websocket_id: Option<ConnectionId>,
) -> Result<BlockCommunityResponse, LemmyError> {
let data: &BlockCommunity = self;
let local_user_view =
get_local_user_view_from_jwt(&data.auth, context.pool(), context.secret()).await?;
let community_id = data.community_id;
let person_id = local_user_view.person.id;
let community_block_form = CommunityBlockForm {
person_id,
community_id,
};
if data.block {
let block = move |conn: &'_ _| CommunityBlock::block(conn, &community_block_form);
blocking(context.pool(), block)
.await?
.map_err(LemmyError::from)
.map_err(|e| e.with_message("community_block_already_exists"))?;
// Also, unfollow the community, and send a federated unfollow
let community_follower_form = CommunityFollowerForm {
community_id: data.community_id,
person_id,
pending: false,
};
blocking(context.pool(), move |conn: &'_ _| {
CommunityFollower::unfollow(conn, &community_follower_form)
})
.await?
.ok();
let community = blocking(context.pool(), move |conn| {
Community::read(conn, community_id)
})
.await??;
UndoFollowCommunity::send(&local_user_view.person.into(), &community.into(), context).await?;
} else {
let unblock = move |conn: &'_ _| CommunityBlock::unblock(conn, &community_block_form);
blocking(context.pool(), unblock)
.await?
.map_err(LemmyError::from)
.map_err(|e| e.with_message("community_block_already_exists"))?;
}
let community_view = blocking(context.pool(), move |conn| {
CommunityView::read(conn, community_id, Some(person_id))
})
.await??;
Ok(BlockCommunityResponse {
blocked: data.block,
community_view,
})
}
}
#[async_trait::async_trait(?Send)]
impl Perform for BanFromCommunity {
type Response = BanFromCommunityResponse;
#[tracing::instrument(skip(context, websocket_id))]
async fn perform(
&self,
context: &Data<LemmyContext>,
websocket_id: Option<ConnectionId>,
) -> Result<BanFromCommunityResponse, LemmyError> {
let data: &BanFromCommunity = self;
let local_user_view =
get_local_user_view_from_jwt(&data.auth, context.pool(), context.secret()).await?;
let community_id = data.community_id;
let banned_person_id = data.person_id;
let remove_data = data.remove_data.unwrap_or(false);
let expires = data.expires.map(naive_from_unix);
// Verify that only mods or admins can ban
is_mod_or_admin(context.pool(), local_user_view.person.id, community_id).await?;
let community_user_ban_form = CommunityPersonBanForm {
community_id: data.community_id,
person_id: data.person_id,
expires: Some(expires),
};
let community: ApubCommunity = blocking(context.pool(), move |conn: &'_ _| {
Community::read(conn, community_id)
})
.await??
.into();
let banned_person: ApubPerson = blocking(context.pool(), move |conn: &'_ _| {
Person::read(conn, banned_person_id)
})
.await??
.into();
if data.ban {
let ban = move |conn: &'_ _| CommunityPersonBan::ban(conn, &community_user_ban_form);
blocking(context.pool(), ban)
.await?
.map_err(LemmyError::from)
.map_err(|e| e.with_message("community_user_already_banned"))?;
// Also unsubscribe them from the community, if they are subscribed
let community_follower_form = CommunityFollowerForm {
community_id: data.community_id,
person_id: banned_person_id,
pending: false,
};
blocking(context.pool(), move |conn: &'_ _| {
CommunityFollower::unfollow(conn, &community_follower_form)
})
.await?
.ok();
BlockUser::send(
&SiteOrCommunity::Community(community),
&banned_person,
&local_user_view.person.clone().into(),
remove_data,
data.reason.clone(),
expires,
context,
)
.await?;
} else {
let unban = move |conn: &'_ _| CommunityPersonBan::unban(conn, &community_user_ban_form);
blocking(context.pool(), unban)
.await?
.map_err(LemmyError::from)
.map_err(|e| e.with_message("community_user_already_banned"))?;
UndoBlockUser::send(
&SiteOrCommunity::Community(community),
&banned_person,
&local_user_view.person.clone().into(),
data.reason.clone(),
context,
)
.await?;
}
// Remove/Restore their data if that's desired
if remove_data {
remove_user_data_in_community(community_id, banned_person_id, context.pool()).await?;
}
// Mod tables
let form = ModBanFromCommunityForm {
mod_person_id: local_user_view.person.id,
other_person_id: data.person_id,
community_id: data.community_id,
reason: data.reason.to_owned(),
banned: Some(data.ban),
expires,
};
blocking(context.pool(), move |conn| {
ModBanFromCommunity::create(conn, &form)
})
.await??;
let person_id = data.person_id;
let person_view = blocking(context.pool(), move |conn| {
PersonViewSafe::read(conn, person_id)
})
.await??;
let res = BanFromCommunityResponse {
person_view,
banned: data.ban,
};
context.chat_server().do_send(SendCommunityRoomMessage {
op: UserOperation::BanFromCommunity,
response: res.clone(),
community_id,
websocket_id,
});
Ok(res)
}
}
#[async_trait::async_trait(?Send)]
impl Perform for AddModToCommunity {
type Response = AddModToCommunityResponse;
#[tracing::instrument(skip(context, websocket_id))]
async fn perform(
&self,
context: &Data<LemmyContext>,
websocket_id: Option<ConnectionId>,
) -> Result<AddModToCommunityResponse, LemmyError> {
let data: &AddModToCommunity = self;
let local_user_view =
get_local_user_view_from_jwt(&data.auth, context.pool(), context.secret()).await?;
let community_id = data.community_id;
// Verify that only mods or admins can add mod
is_mod_or_admin(context.pool(), local_user_view.person.id, community_id).await?;
let community = blocking(context.pool(), move |conn| {
Community::read(conn, community_id)
})
.await??;
if local_user_view.person.admin && !community.local {
return Err(LemmyError::from_message("not_a_moderator"));
}
// Update in local database
let community_moderator_form = CommunityModeratorForm {
community_id: data.community_id,
person_id: data.person_id,
};
if data.added {
let join = move |conn: &'_ _| CommunityModerator::join(conn, &community_moderator_form);
blocking(context.pool(), join)
.await?
.map_err(LemmyError::from)
.map_err(|e| e.with_message("community_moderator_already_exists"))?;
} else {
let leave = move |conn: &'_ _| CommunityModerator::leave(conn, &community_moderator_form);
blocking(context.pool(), leave)
.await?
.map_err(LemmyError::from)
.map_err(|e| e.with_message("community_moderator_already_exists"))?;
}
// Mod tables
let form = ModAddCommunityForm {
mod_person_id: local_user_view.person.id,
other_person_id: data.person_id,
community_id: data.community_id,
removed: Some(!data.added),
};
blocking(context.pool(), move |conn| {
ModAddCommunity::create(conn, &form)
})
.await??;
// Send to federated instances
let updated_mod_id = data.person_id;
let updated_mod: ApubPerson = blocking(context.pool(), move |conn| {
Person::read(conn, updated_mod_id)
})
.await??
.into();
let community: ApubCommunity = community.into();
if data.added {
AddMod::send(
&community,
&updated_mod,
&local_user_view.person.into(),
context,
)
.await?;
} else {
RemoveMod::send(
&community,
&updated_mod,
&local_user_view.person.into(),
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??;
let res = AddModToCommunityResponse { moderators };
context.chat_server().do_send(SendCommunityRoomMessage {
op: UserOperation::AddModToCommunity,
response: res.clone(),
community_id,
websocket_id,
});
Ok(res)
}
}
// 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;
#[tracing::instrument(skip(context, _websocket_id))]
async fn perform(
&self,
context: &Data<LemmyContext>,
_websocket_id: Option<ConnectionId>,
) -> Result<GetCommunityResponse, LemmyError> {
let data: &TransferCommunity = self;
let local_user_view =
get_local_user_view_from_jwt(&data.auth, context.pool(), context.secret()).await?;
let admins = blocking(context.pool(), PersonViewSafe::admins).await??;
// Fetch the community mods
let community_id = data.community_id;
let mut community_mods = blocking(context.pool(), move |conn| {
CommunityModeratorView::for_community(conn, community_id)
})
.await??;
// Make sure transferrer is either the top community mod, or an admin
if local_user_view.person.id != community_mods[0].moderator.id
&& !admins
.iter()
.map(|a| a.person.id)
.any(|x| x == local_user_view.person.id)
{
return Err(LemmyError::from_message("not_an_admin"));
}
// You have to re-do the community_moderator table, reordering it.
// Add the transferee to the top
let creator_index = community_mods
.iter()
.position(|r| r.moderator.id == data.person_id)
.context(location_info!())?;
let creator_person = community_mods.remove(creator_index);
community_mods.insert(0, creator_person);
// Delete all the mods
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
// Re-add the mods, in the new order
for cmod in &community_mods {
let community_moderator_form = CommunityModeratorForm {
community_id: cmod.community.id,
person_id: cmod.moderator.id,
};
let join = move |conn: &'_ _| CommunityModerator::join(conn, &community_moderator_form);
blocking(context.pool(), join)
.await?
.map_err(LemmyError::from)
.map_err(|e| e.with_message("community_moderator_already_exists"))?;
}
// Mod tables
let form = ModTransferCommunityForm {
mod_person_id: local_user_view.person.id,
other_person_id: data.person_id,
community_id: data.community_id,
removed: Some(false),
};
blocking(context.pool(), move |conn| {
ModTransferCommunity::create(conn, &form)
})
.await??;
let community_id = data.community_id;
let person_id = local_user_view.person.id;
let community_view = blocking(context.pool(), move |conn| {
CommunityView::read(conn, community_id, Some(person_id))
})
.await?
.map_err(LemmyError::from)
.map_err(|e| e.with_message("couldnt_find_community"))?;
let community_id = data.community_id;
let moderators = blocking(context.pool(), move |conn| {
CommunityModeratorView::for_community(conn, community_id)
})
.await?
.map_err(LemmyError::from)
.map_err(|e| e.with_message("couldnt_find_community"))?;
// Return the jwt
Ok(GetCommunityResponse {
community_view,
moderators,
online: 0,
})
}
}