Add ban tracking

- Add bans table
- Periodically refresh bans list every 1-1.25 hours

db/50-bans.sql

@@ -0,0 +1,3 @@
+CREATE TABLE bans (
+	userid integer
+)

src/app.ts

@@ -262,11 +262,32 @@ app.get("/", async (request, response) => {
 //
 //});
 
-app.get("/streamer/auth", async ({}, response) => response.redirect(307, `https://id.twitch.tv/oauth2/authorize?client_id=${config.twitchClientId}&redirect_uri=${config.urlPrefix}/callback&response_type=code&scope=channel:read:subscriptions moderation:read`));
-
 // Logout
 app.get("/logout", async (request, response) => request.session!.destroy(() => response.redirect(307, '/')));
 
+async function processBannedUsers() {
+	console.log("processBannedUsers run at " + new Date().toISOString());
+	var streamer = await db.query(queries.getStreamerIdToken).then((result: pg.QueryResult) => result.rows[0]);
+	if (streamer['tokenpair'] != null) {
+		var response = await twitch.apiRequest(streamer['tokenpair'],"/moderation/banned?broadcaster_id=" + streamer['userid']);
+		var dbconn = await db.connect();
+		try {
+			await dbconn.query('BEGIN');
+			for (var ban of response.data) {
+				if (ban.expires_at == '') dbconn.query(Object.assign(queries.insertBan,{ values: [ban.user_id] }))
+			}
+			await dbconn.query('COMMIT');
+		} catch (e) {
+			await dbconn.query('ROLLBACK');
+		} finally {
+			dbconn.release();
+		}
+	}
+	setTimeout(processBannedUsers,3600000+Math.floor(Math.random()*900000)) // Run every 1-1.25 hours to balance load
+}
+
+processBannedUsers();
+
 app.listen(config.port, () => {
   console.log(`Listening on port ${config.port}`);
 });