lemmy/crates/api/src/community.rs

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use crate::Perform;
use actix_web::web::Data;
use anyhow::Context;
use lemmy_api_common::{
blocking,
check_community_ban,
community::*,
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get_local_user_view_from_jwt,
is_mod_or_admin,
};
use lemmy_apub::{
activities::following::{
follow::FollowCommunity as FollowCommunityApub,
undo::UndoFollowCommunity,
},
CommunityType,
};
use lemmy_db_queries::{
source::{comment::Comment_, community::CommunityModerator_, post::Post_},
Bannable,
Crud,
Followable,
Joinable,
};
use lemmy_db_schema::source::{
comment::Comment,
community::*,
moderator::*,
person::Person,
post::Post,
site::*,
};
use lemmy_db_views::comment_view::CommentQueryBuilder;
use lemmy_db_views_actor::{
community_moderator_view::CommunityModeratorView,
community_view::CommunityView,
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person_view::PersonViewSafe,
};
use lemmy_utils::{location_info, utils::naive_from_unix, ApiError, ConnectionId, LemmyError};
use lemmy_websocket::{messages::SendCommunityRoomMessage, LemmyContext, UserOperation};
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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> {
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let data: &FollowCommunity = self;
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let local_user_view = get_local_user_view_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,
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person_id: local_user_view.person.id,
pending: false,
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};
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if community.local {
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if data.follow {
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check_community_ban(local_user_view.person.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
FollowCommunityApub::send(&local_user_view.person, &community, context).await?;
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} else {
UndoFollowCommunity::send(&local_user_view.person, &community, 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;
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let person_id = local_user_view.person.id;
let mut community_view = blocking(context.pool(), move |conn| {
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CommunityView::read(conn, community_id, Some(person_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 BanFromCommunity {
type Response = BanFromCommunityResponse;
async fn perform(
&self,
context: &Data<LemmyContext>,
websocket_id: Option<ConnectionId>,
) -> Result<BanFromCommunityResponse, LemmyError> {
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let data: &BanFromCommunity = self;
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let local_user_view = get_local_user_view_from_jwt(&data.auth, context.pool()).await?;
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let community_id = data.community_id;
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let banned_person_id = data.person_id;
// Verify that only mods or admins can ban
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is_mod_or_admin(context.pool(), local_user_view.person.id, community_id).await?;
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let community_user_ban_form = CommunityPersonBanForm {
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community_id: data.community_id,
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person_id: data.person_id,
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};
let community = blocking(context.pool(), move |conn: &'_ _| {
Community::read(conn, community_id)
})
.await??;
let banned_person = blocking(context.pool(), move |conn: &'_ _| {
Person::read(conn, banned_person_id)
})
.await??;
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if data.ban {
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let ban = move |conn: &'_ _| CommunityPersonBan::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,
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person_id: banned_person_id,
pending: false,
};
blocking(context.pool(), move |conn: &'_ _| {
CommunityFollower::unfollow(conn, &community_follower_form)
})
.await?
.ok();
community
.send_block_user(&local_user_view.person, banned_person, context)
.await?;
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} else {
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let unban = move |conn: &'_ _| CommunityPersonBan::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());
}
community
.send_undo_block_user(&local_user_view.person, banned_person, context)
.await?;
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}
// Remove/Restore their data if that's desired
if data.remove_data.unwrap_or(false) {
// Posts
blocking(context.pool(), move |conn: &'_ _| {
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Post::update_removed_for_creator(conn, banned_person_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)
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.creator_id(banned_person_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 = data.expires.map(naive_from_unix);
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let form = ModBanFromCommunityForm {
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mod_person_id: local_user_view.person.id,
other_person_id: data.person_id,
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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 person_id = data.person_id;
let person_view = blocking(context.pool(), move |conn| {
PersonViewSafe::read(conn, person_id)
})
.await??;
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let res = BanFromCommunityResponse {
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person_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> {
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let data: &AddModToCommunity = self;
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let local_user_view = get_local_user_view_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
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is_mod_or_admin(context.pool(), local_user_view.person.id, community_id).await?;
// Update in local database
let community_moderator_form = CommunityModeratorForm {
community_id: data.community_id,
person_id: data.person_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 {
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mod_person_id: local_user_view.person.id,
other_person_id: data.person_id,
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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.person_id;
let updated_mod = blocking(context.pool(), move |conn| {
Person::read(conn, updated_mod_id)
})
.await??;
let community = blocking(context.pool(), move |conn| {
Community::read(conn, community_id)
})
.await??;
if data.added {
community
.send_add_mod(&local_user_view.person, updated_mod, context)
.await?;
} else {
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community
.send_remove_mod(&local_user_view.person, updated_mod, context)
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.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> {
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let data: &TransferCommunity = self;
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let local_user_view = get_local_user_view_from_jwt(&data.auth, context.pool()).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| PersonViewSafe::admins(conn)).await??;
// Making sure the site creator, if an admin, is at the top
let creator_index = admins
.iter()
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.position(|r| r.person.id == site_creator_id)
.context(location_info!())?;
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let creator_person = admins.remove(creator_index);
admins.insert(0, creator_person);
// 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
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&& !admins
.iter()
.map(|a| a.person.id)
.any(|x| x == local_user_view.person.id)
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{
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return Err(ApiError::err("not_an_admin").into());
}
// You have to re-do the community_moderator table, reordering it.
// Add the transferee to the top
let creator_index = community_mods
.iter()
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.position(|r| r.moderator.id == data.person_id)
.context(location_info!())?;
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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 {
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community_id: cmod.community.id,
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person_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
// TODO there should probably be another table for transfer community
// Right now, it will just look like it modded them twice
let form = ModAddCommunityForm {
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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| {
ModAddCommunity::create(conn, &form)
})
.await??;
let community_id = data.community_id;
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let person_id = local_user_view.person.id;
let community_view = blocking(context.pool(), move |conn| {
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CommunityView::read(conn, community_id, Some(person_id))
})
.await?
.map_err(|_| ApiError::err("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(|_| ApiError::err("couldnt_find_community"))?;
// Return the jwt
Ok(GetCommunityResponse {
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community_view,
moderators,
online: 0,
})
}
}