Files
handmade-revolt-backend/src/notifications/subscriptions.rs
Paul 8f6e5be1d4 Events: Distribute user updates to servers.
Fix: Deleting a server now correctly deletes all associated objects.
2021-07-28 13:40:03 +01:00

88 lines
2.4 KiB
Rust

use crate::database::*;
use super::hive::get_hive;
use futures::StreamExt;
use hive_pubsub::PubSub;
use mongodb::bson::doc;
use mongodb::bson::Document;
use mongodb::options::FindOptions;
pub async fn generate_subscriptions(user: &User) -> Result<(), String> {
let hive = get_hive();
hive.subscribe(user.id.clone(), user.id.clone())?;
if let Some(relations) = &user.relations {
for relation in relations {
hive.subscribe(user.id.clone(), relation.id.clone())?;
}
}
let server_ids = User::fetch_server_ids(&user.id)
.await
.map_err(|_| "Failed to fetch memberships.".to_string())?;
let channel_ids = get_collection("servers")
.find(
doc! {
"_id": {
"$in": &server_ids
}
},
None,
)
.await
.map_err(|_| "Failed to fetch servers.".to_string())?
.filter_map(async move |s| s.ok())
.collect::<Vec<Document>>()
.await
.into_iter()
.filter_map(|x| {
x.get_array("channels").ok().map(|v| {
v.into_iter()
.filter_map(|x| x.as_str().map(|x| x.to_string()))
.collect::<Vec<String>>()
})
})
.flatten()
.collect::<Vec<String>>();
for id in server_ids {
hive.subscribe(user.id.clone(), id)?;
}
for id in channel_ids {
hive.subscribe(user.id.clone(), id)?;
}
let mut cursor = get_collection("channels")
.find(
doc! {
"$or": [
{
"channel_type": "SavedMessages",
"user": &user.id
},
{
"channel_type": "DirectMessage",
"recipients": &user.id
},
{
"channel_type": "Group",
"recipients": &user.id
}
]
},
FindOptions::builder().projection(doc! { "_id": 1 }).build(),
)
.await
.map_err(|_| "Failed to fetch channels.".to_string())?;
while let Some(result) = cursor.next().await {
if let Ok(doc) = result {
hive.subscribe(user.id.clone(), doc.get_str("_id").unwrap().to_string())?;
}
}
Ok(())
}