114 lines
3.0 KiB
Rust
114 lines
3.0 KiB
Rust
use std::collections::HashMap;
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use uuid::Uuid;
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use model::room::RoomMessageModel;
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use serde::{Deserialize, Serialize};
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use crate::rooms::RM_COLUMNS;
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use crate::ChannelResult;
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#[derive(Debug, Clone, Serialize, Deserialize)]
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pub struct ClientState {
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pub user_id: Uuid,
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pub last_seq: HashMap<Uuid, i64>,
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pub last_seen: chrono::DateTime<chrono::Utc>,
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}
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#[derive(Debug, Clone, Serialize, Deserialize)]
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pub struct MissedMessage {
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pub room_id: Uuid,
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pub message_id: Uuid,
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pub seq: i64,
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pub content: String,
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pub sender_id: Uuid,
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pub send_at: chrono::DateTime<chrono::Utc>,
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}
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#[derive(Clone)]
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pub struct ReconnectManager {
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cache: cache::AppCache,
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db: db::AppDatabase,
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}
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impl ReconnectManager {
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pub fn new(cache: cache::AppCache, db: db::AppDatabase) -> Self {
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Self { cache, db }
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}
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pub async fn save_client_state(
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&self,
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user_id: Uuid,
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room_id: Uuid,
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last_seq: i64,
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) -> ChannelResult<()> {
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let key = format!("client:state:{}:{}", user_id, room_id);
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self.cache.set(&key, &last_seq.to_string()).await?;
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if let Some(cluster) = &self.cache.cluster {
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cluster
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.expire(&key, std::time::Duration::from_secs(86400))
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.await?;
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}
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Ok(())
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}
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pub async fn get_last_seq(
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&self,
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user_id: Uuid,
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room_id: Uuid,
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) -> ChannelResult<Option<i64>> {
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let key = format!("client:state:{}:{}", user_id, room_id);
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let value: Option<String> = self.cache.get(&key).await?;
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Ok(value.and_then(|v| v.parse::<i64>().ok()))
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}
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pub async fn get_missed_messages(
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&self,
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room_id: Uuid,
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since_seq: i64,
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) -> ChannelResult<Vec<MissedMessage>> {
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let messages = db::sqlx::query_as::<_, RoomMessageModel>(
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db::sqlx::AssertSqlSafe(format!(
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"SELECT {RM_COLUMNS} FROM room_message \
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WHERE room = $1 AND seq > $2 AND deleted_at IS NULL \
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ORDER BY seq ASC \
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LIMIT 100"
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)),
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)
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.bind(room_id)
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.bind(since_seq)
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.fetch_all(self.db.reader())
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.await?;
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let missed: Vec<MissedMessage> = messages
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.into_iter()
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.map(|m| MissedMessage {
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room_id: m.room,
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message_id: m.id,
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seq: m.seq,
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content: m.content,
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sender_id: m.author,
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send_at: m.created_at,
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})
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.collect();
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Ok(missed)
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}
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pub async fn handle_reconnect(
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&self,
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_user_id: Uuid,
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room_states: HashMap<Uuid, i64>,
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) -> ChannelResult<HashMap<Uuid, Vec<MissedMessage>>> {
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let mut result = HashMap::new();
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for (room_id, client_seq) in room_states {
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let missed = self.get_missed_messages(room_id, client_seq).await?;
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if !missed.is_empty() {
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result.insert(room_id, missed);
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}
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}
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Ok(result)
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}
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}
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