120 lines
3.7 KiB
Rust
120 lines
3.7 KiB
Rust
use crate::Result;
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use ruma_events::{collections::only::Event as EduEvent, EventJson};
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use ruma_identifiers::{RoomId, UserId};
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use std::collections::HashMap;
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pub struct AccountData {
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pub(super) roomuserdataid_accountdata: sled::Tree, // RoomUserDataId = Room + User + Count + Type
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}
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impl AccountData {
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/// Places one event in the account data of the user and removes the previous entry.
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pub fn update(
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&self,
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room_id: Option<&RoomId>,
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user_id: &UserId,
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event: EduEvent,
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globals: &super::globals::Globals,
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) -> Result<()> {
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let mut prefix = room_id
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.map(|r| r.to_string())
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.unwrap_or_default()
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.as_bytes()
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.to_vec();
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prefix.push(0xff);
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prefix.extend_from_slice(&user_id.to_string().as_bytes());
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prefix.push(0xff);
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// Remove old entry
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if let Some(old) = self
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.roomuserdataid_accountdata
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.scan_prefix(&prefix)
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.keys()
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.rev()
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.filter_map(|r| r.ok())
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.take_while(|key| key.starts_with(&prefix))
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.find(|key| {
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key.split(|&b| b == 0xff)
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.nth(1)
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.filter(|&user| user == user_id.to_string().as_bytes())
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.is_some()
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})
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{
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// This is the old room_latest
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self.roomuserdataid_accountdata.remove(old)?;
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println!("removed old account data");
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}
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let mut key = prefix;
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key.extend_from_slice(&globals.next_count()?.to_be_bytes());
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key.push(0xff);
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let json = serde_json::to_value(&event)?;
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key.extend_from_slice(json["type"].as_str().unwrap().as_bytes());
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self.roomuserdataid_accountdata
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.insert(key, &*json.to_string())
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.unwrap();
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Ok(())
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}
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// TODO: Optimize
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/// Searches the account data for a specific kind.
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pub fn get(
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&self,
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room_id: Option<&RoomId>,
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user_id: &UserId,
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kind: &str,
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) -> Result<Option<EventJson<EduEvent>>> {
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Ok(self.all(room_id, user_id)?.remove(kind))
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}
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/// Returns all changes to the account data that happened after `since`.
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pub fn changes_since(
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&self,
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room_id: Option<&RoomId>,
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user_id: &UserId,
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since: u64,
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) -> Result<HashMap<String, EventJson<EduEvent>>> {
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let mut userdata = HashMap::new();
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let mut prefix = room_id
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.map(|r| r.to_string())
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.unwrap_or_default()
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.as_bytes()
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.to_vec();
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prefix.push(0xff);
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prefix.extend_from_slice(&user_id.to_string().as_bytes());
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prefix.push(0xff);
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// Skip the data that's exactly at since, because we sent that last time
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let mut first_possible = prefix.clone();
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first_possible.extend_from_slice(&(since + 1).to_be_bytes());
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for json in self
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.roomuserdataid_accountdata
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.range(&*first_possible..)
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.filter_map(|r| r.ok())
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.take_while(move |(k, _)| k.starts_with(&prefix))
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.map(|(_, v)| serde_json::from_slice::<serde_json::Value>(&v).unwrap())
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{
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userdata.insert(
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json["type"].as_str().unwrap().to_owned(),
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serde_json::from_value::<EventJson<EduEvent>>(json)
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.expect("userdata in db is valid"),
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);
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}
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Ok(userdata)
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}
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/// Returns all account data.
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pub fn all(
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&self,
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room_id: Option<&RoomId>,
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user_id: &UserId,
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) -> Result<HashMap<String, EventJson<EduEvent>>> {
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self.changes_since(room_id, user_id, 0)
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}
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}
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