1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
use crate::{
activities::community::announce::AnnounceActivity,
fetcher::{
fetch::fetch_remote_object,
is_deleted,
person::get_or_fetch_and_upsert_person,
should_refetch_actor,
},
objects::{community::Group, FromApub},
};
use activitystreams::collection::{CollectionExt, OrderedCollection};
use anyhow::Context;
use diesel::result::Error::NotFound;
use lemmy_api_common::blocking;
use lemmy_apub_lib::ActivityHandler;
use lemmy_db_queries::{source::community::Community_, ApubObject, Joinable};
use lemmy_db_schema::source::community::{Community, CommunityModerator, CommunityModeratorForm};
use lemmy_db_views_actor::community_moderator_view::CommunityModeratorView;
use lemmy_utils::{location_info, LemmyError};
use lemmy_websocket::LemmyContext;
use log::debug;
use url::Url;
pub(crate) async fn get_or_fetch_and_upsert_community(
apub_id: &Url,
context: &LemmyContext,
recursion_counter: &mut i32,
) -> Result<Community, LemmyError> {
let apub_id_owned = apub_id.to_owned();
let community = blocking(context.pool(), move |conn| {
Community::read_from_apub_id(conn, &apub_id_owned.into())
})
.await?;
match community {
Ok(c) if !c.local && should_refetch_actor(c.last_refreshed_at) => {
debug!("Fetching and updating from remote community: {}", apub_id);
fetch_remote_community(apub_id, context, Some(c), recursion_counter).await
}
Ok(c) => Ok(c),
Err(NotFound {}) => {
debug!("Fetching and creating remote community: {}", apub_id);
fetch_remote_community(apub_id, context, None, recursion_counter).await
}
Err(e) => Err(e.into()),
}
}
async fn fetch_remote_community(
apub_id: &Url,
context: &LemmyContext,
old_community: Option<Community>,
request_counter: &mut i32,
) -> Result<Community, LemmyError> {
let group = fetch_remote_object::<Group>(context.client(), apub_id, request_counter).await;
if let Some(c) = old_community.to_owned() {
if is_deleted(&group) {
blocking(context.pool(), move |conn| {
Community::update_deleted(conn, c.id, true)
})
.await??;
} else if group.is_err() {
return Ok(c);
}
}
let group = group?;
let community = Community::from_apub(&group, context, apub_id, request_counter).await?;
update_community_mods(&group, &community, context, request_counter).await?;
if old_community.is_none() {
fetch_community_outbox(context, &group.outbox, request_counter).await?
}
Ok(community)
}
async fn update_community_mods(
group: &Group,
community: &Community,
context: &LemmyContext,
request_counter: &mut i32,
) -> Result<(), LemmyError> {
let new_moderators = fetch_community_mods(context, group, request_counter).await?;
let community_id = community.id;
let current_moderators = blocking(context.pool(), move |conn| {
CommunityModeratorView::for_community(conn, community_id)
})
.await??;
for mod_user in ¤t_moderators {
if !new_moderators.contains(&mod_user.moderator.actor_id.clone().into()) {
let community_moderator_form = CommunityModeratorForm {
community_id: mod_user.community.id,
person_id: mod_user.moderator.id,
};
blocking(context.pool(), move |conn| {
CommunityModerator::leave(conn, &community_moderator_form)
})
.await??;
}
}
for mod_uri in new_moderators {
let mod_user = get_or_fetch_and_upsert_person(&mod_uri, context, request_counter).await?;
if !current_moderators
.clone()
.iter()
.map(|c| c.moderator.actor_id.clone())
.any(|x| x == mod_user.actor_id)
{
let community_moderator_form = CommunityModeratorForm {
community_id: community.id,
person_id: mod_user.id,
};
blocking(context.pool(), move |conn| {
CommunityModerator::join(conn, &community_moderator_form)
})
.await??;
}
}
Ok(())
}
async fn fetch_community_outbox(
context: &LemmyContext,
outbox: &Url,
recursion_counter: &mut i32,
) -> Result<(), LemmyError> {
let outbox =
fetch_remote_object::<OrderedCollection>(context.client(), outbox, recursion_counter).await?;
let outbox_activities = outbox.items().context(location_info!())?.clone();
let mut outbox_activities = outbox_activities.many().context(location_info!())?;
if outbox_activities.len() > 20 {
outbox_activities = outbox_activities[0..20].to_vec();
}
for announce in outbox_activities {
let ser = serde_json::to_string(&announce)?;
let announce: AnnounceActivity = serde_json::from_str(&ser)?;
announce.receive(context, recursion_counter).await?;
}
Ok(())
}
pub(crate) async fn fetch_community_mods(
context: &LemmyContext,
group: &Group,
recursion_counter: &mut i32,
) -> Result<Vec<Url>, LemmyError> {
if let Some(mods_url) = &group.moderators {
let mods =
fetch_remote_object::<OrderedCollection>(context.client(), mods_url, recursion_counter)
.await?;
let mods = mods
.items()
.map(|i| i.as_many())
.flatten()
.context(location_info!())?
.iter()
.filter_map(|i| i.as_xsd_any_uri())
.map(|u| u.to_owned())
.collect();
Ok(mods)
} else {
Ok(vec![])
}
}