feat(ai-help): delete ai history after six months

.settings.dev.toml

@@ -51,3 +51,4 @@ flag_repo = "flags"
 [ai]
 api_key = ""
 limit_reset_duration_in_sec = 3600
+history_deletion_period_in_sec = 15_778_476

.settings.local.toml

@@ -13,10 +13,10 @@ scopes = "openid profile email profile:subscriptions"
 auth_cookie_name = "auth-cookie"
 login_cookie_name = "login-cookie"
 auth_cookie_secure = false
-client_id="TEST_CLIENT_ID"
-client_secret="TEST_CLIENT_SECRET"
+client_id = "TEST_CLIENT_ID"
+client_secret = "TEST_CLIENT_SECRET"
 cookie_key = "DUwIFZuUYzRhHPlhOm6DwTHSDUSyR5SyvZHIeHdx4DIanxm5/GD/4dqXROLvn5vMofOYUq37HhhivjCyMCWP4w=="
-admin_update_bearer_token="TEST_TOKEN"
+admin_update_bearer_token = "TEST_TOKEN"
 
 [application]
 document_base_url = "https://developer.allizom.org"
@@ -51,3 +51,4 @@ flag_repo = "flags"
 [ai]
 api_key = ""
 limit_reset_duration_in_sec = 3600
+history_deletion_period_in_sec = 15_778_476

.settings.test.toml

@@ -13,10 +13,10 @@ scopes = "openid profile email profile:subscriptions"
 auth_cookie_name = "auth-cookie"
 login_cookie_name = "login-cookie"
 auth_cookie_secure = false
-client_id="TEST_CLIENT_ID"
-client_secret="TEST_CLIENT_SECRET"
+client_id = "TEST_CLIENT_ID"
+client_secret = "TEST_CLIENT_SECRET"
 cookie_key = "DUwIFZuUYzRhHPlhOm6DwTHSDUSyR5SyvZHIeHdx4DIanxm5/GD/4dqXROLvn5vMofOYUq37HhhivjCyMCWP4w=="
-admin_update_bearer_token="TEST_TOKEN"
+admin_update_bearer_token = "TEST_TOKEN"
 
 [application]
 document_base_url = "http://localhost:4321"
@@ -52,3 +52,4 @@ flag_repo = "flags"
 limit_reset_duration_in_sec = 5
 api_key = ""
 explain_sign_key = "kmMAMku9PB/fTtaoLg82KjTvShg8CSZCBUNuJhUz5Pg="
+history_deletion_period_in_sec = 15_778_476

src/api/admin.rs

@@ -1,6 +1,11 @@
+use crate::db::ai_history::do_delete_old_ai_history;
 use crate::db::v2::synchronize_bcd_updates_db::update_bcd;
+use crate::db::Pool;
 use crate::settings::SETTINGS;
+use actix_rt::ArbiterHandle;
 use actix_web::dev::{HttpServiceFactory, ServiceRequest};
+use actix_web::web::Data;
+use actix_web::HttpResponse;
 use actix_web::{web, Error};
 use actix_web_httpauth::extractors::bearer::BearerAuth;
 use actix_web_httpauth::middleware::HttpAuthentication;
@@ -22,4 +27,19 @@ pub fn admin_service() -> impl HttpServiceFactory {
     web::scope("/admin-api")
         .wrap(HttpAuthentication::bearer(validator))
         .service(web::resource("/v2/updates/").route(web::post().to(update_bcd)))
+        .service(web::resource("/ai-history/").route(web::post().to(delete_old_ai_history)))
+}
+
+pub async fn delete_old_ai_history(
+    pool: Data<Pool>,
+    arbiter: Data<ArbiterHandle>,
+) -> Result<HttpResponse, ApiError> {
+    if !arbiter.spawn(async move {
+        if let Err(e) = do_delete_old_ai_history(pool).await {
+            error!("{}", e);
+        }
+    }) {
+        return Ok(HttpResponse::InternalServerError().finish());
+    }
+    Ok(HttpResponse::Accepted().finish())
 }

src/db/ai_history.rs

@@ -0,0 +1,35 @@
+use crate::db::schema::ai_help_history;
+use crate::db::Pool;
+use crate::diesel::QueryDsl;
+use crate::{api::error::ApiError, settings::SETTINGS};
+use actix_web::web::Data;
+use chrono::Utc;
+use diesel::{ExpressionMethods, RunQueryDsl};
+use std::ops::Sub;
+use std::time::Duration;
+
+/// This removes old AI history records from the database. It is meant to be called from a
+/// cron job calling the respective endpoint in the admin API.
+pub async fn do_delete_old_ai_history(pool: Data<Pool>) -> Result<(), ApiError> {
+    let mut conn = pool.get()?;
+    let history_deletion_period_in_sec = SETTINGS
+        .ai
+        .as_ref()
+        .map(|ai| ai.history_deletion_period_in_sec)
+        .ok_or(ApiError::Generic(
+            "ai.history_deletion_period_in_sec missing from configuration".to_string(),
+        ))?;
+
+    let oldest_timestamp = Utc::now()
+        .sub(Duration::from_secs(history_deletion_period_in_sec))
+        .naive_utc();
+
+    let affected_rows = diesel::delete(
+        ai_help_history::table.filter(ai_help_history::updated_at.lt(oldest_timestamp)),
+    )
+    .execute(&mut conn)?;
+    info!(
+        "Deleted old AI history before {oldest_timestamp}: {affected_rows} old record(s) deleted."
+    );
+    Ok(())
+}

src/db/mod.rs

@@ -1,5 +1,6 @@
 pub mod ai_explain;
 pub mod ai_help;
+pub mod ai_history;
 pub mod documents;
 pub mod error;
 pub mod fxa_webhook;

src/settings.rs

@@ -81,6 +81,7 @@ pub struct AI {
     pub limit_reset_duration_in_sec: i64,
     #[serde_as(as = "Base64")]
     pub explain_sign_key: [u8; 32],
+    pub history_deletion_period_in_sec: u64,
 }
 
 #[serde_as]

tests/api/ai_help_history.rs

@@ -5,11 +5,19 @@ use actix_web::test;
 use anyhow::Error;
 use async_openai::types::ChatCompletionRequestMessage;
 use async_openai::types::Role::{Assistant, User};
+use chrono::{NaiveDateTime, Utc};
+use diesel::dsl::count;
+use diesel::prelude::*;
+use diesel::{insert_into, ExpressionMethods, RunQueryDsl};
 use rumba::ai::help::RefDoc;
 use rumba::db::ai_help::{add_help_history, add_help_history_message};
-use rumba::db::model::{AIHelpHistoryMessageInsert, SettingsInsert};
+use rumba::db::model::{AIHelpHistoryInsert, AIHelpHistoryMessageInsert, SettingsInsert};
+use rumba::db::schema::ai_help_history;
 use rumba::db::settings::create_or_update_settings;
+use rumba::settings::SETTINGS;
 use serde_json::Value::Null;
+use std::ops::Sub;
+use std::time::Duration;
 use uuid::Uuid;
 
 const CHAT_ID: Uuid = Uuid::nil();
@@ -95,6 +103,105 @@ async fn test_history() -> Result<(), Error> {
     Ok(())
 }
 
+#[actix_rt::test]
+#[stubr::mock(port = 4321)]
+async fn test_history_deletion() -> Result<(), Error> {
+    let pool = reset()?;
+    let app = test_app_with_login(&pool).await.unwrap();
+    let service = test::init_service(app).await;
+    let mut _logged_in_client = TestHttpClient::new(&service).await;
+    let mut conn = pool.get()?;
+
+    let history_deletion_period_in_sec = &SETTINGS
+        .ai
+        .as_ref()
+        .map(|ai| ai.history_deletion_period_in_sec)
+        .expect("ai.history_deletion_period_in_sec missing");
+
+    // Add an old chat history entry, double our configured period ago.
+    let ts = Utc::now()
+        .sub(Duration::from_secs(history_deletion_period_in_sec * 2))
+        .naive_utc();
+    let history = AIHelpHistoryInsert {
+        user_id: 1,
+        chat_id: Uuid::from_u128(1),
+        created_at: Some(ts),
+        updated_at: Some(ts),
+        label: "old entry".to_string(),
+    };
+    insert_into(ai_help_history::table)
+        .values(history)
+        .execute(&mut conn)?;
+
+    // Add a newer chat history entry, half of our configured period ago.
+    let ts = Utc::now()
+        // .checked_sub_months(Months::new(2))
+        .sub(Duration::from_secs(history_deletion_period_in_sec / 2))
+        .naive_utc();
+    let history = AIHelpHistoryInsert {
+        user_id: 1,
+        chat_id: Uuid::from_u128(2),
+        created_at: Some(ts),
+        updated_at: Some(ts),
+        label: "new entry".to_string(),
+    };
+    insert_into(ai_help_history::table)
+        .values(history)
+        .execute(&mut conn)?;
+
+    // check the history count before we run the delete job
+    let rec_count = ai_help_history::table
+        .filter(ai_help_history::user_id.eq(1))
+        .select(count(ai_help_history::user_id))
+        .first::<i64>(&mut conn)?;
+
+    assert_eq!(2, rec_count);
+
+    // Now, run the delete job.
+    let req = test::TestRequest::post()
+        .uri("/admin-api/ai-history/")
+        .insert_header((
+            "Authorization",
+            format!("Bearer {}", SETTINGS.auth.admin_update_bearer_token),
+        ))
+        .to_request();
+
+    let res = test::call_service(&service, req).await;
+    assert!(res.response().status().is_success());
+
+    // Check database that the old entry is gone.
+    // Loop until we see the old entry is gone because the
+    // delete job runs asynchonously.
+    let mut retry = 0;
+    const MAX_RETRIES: u32 = 40;
+    let mut records: Vec<NaiveDateTime>;
+    loop {
+        records = ai_help_history::table
+            .filter(ai_help_history::user_id.eq(1))
+            .select(ai_help_history::updated_at)
+            .get_results(&mut conn)?;
+        if records.len() == 1 {
+            break;
+        }
+
+        actix_rt::time::sleep(Duration::from_millis(5)).await;
+        retry += 1;
+        if retry > MAX_RETRIES {
+            break;
+        }
+    }
+
+    assert_eq!(1, records.len());
+    // we only compare up to millisecond precision
+    assert_eq!(
+        ts.timestamp_micros(),
+        records.get(0).unwrap().timestamp_micros()
+    );
+
+    drop_stubr(stubr).await;
+    Ok(())
+}
+
 fn normalize_digits(s: &str) -> String {
     let mut result = String::new();