use channel id instead of the user uuid, some easy anti spamming measure

app.js

@@ -118,6 +118,7 @@ if (config.Email.enabled) {
 }
 
 const notifQueue = []
+const notifHistory = {}
 
 function now() {
   return Math.floor(Date.now() / 1000)
@@ -131,11 +132,19 @@ async function sendEmailPush(channel) {
   if (!emailTransport) {
     return
   }
+
+  // Don't re-send notifications within an hour if a channel happens to go live again
+  if (notifHistory[channel] && notifHistory[channel] > now() - 3600) {
+    return
+  }
+  notifHistory[channel] = now()
+
   const db = await dbPromise
-  const data = await db.get('SELECT name FROM channels WHERE user_uuid = ?', channel)
+  const data = await db.get('SELECT name FROM channels WHERE id = ?', channel)
   if (!data) {
     return;
   }
+
   const subs = await db.all('SELECT email,unsubkey FROM emailsub WHERE uuid = ? AND active = 1', channel);
   for (const sub of subs) {
     const unsubURL = config.Email.baseURL + 'unsubscribe/' + sub.unsubkey
@@ -160,12 +169,12 @@ async function subscribeToChannel(channel, email) {
   }
 
   const db = await dbPromise
-  const data = await db.get('SELECT user_uuid FROM channels WHERE name = ?', channel)
+  const data = await db.get('SELECT id FROM channels WHERE name = ?', channel)
   if (!data) {
     throw new Error('Invalid channel!')
   }
 
-  const exists = await db.get('SELECT * FROM emailsub WHERE email = ? AND uuid = ?', [email, data.user_uuid])
+  const exists = await db.get('SELECT * FROM emailsub WHERE email = ? AND uuid = ?', [email, data.id])
   if (exists) {
     throw new Error('A subscription already exists for this email address.')
   }
@@ -175,7 +184,7 @@ async function subscribeToChannel(channel, email) {
   const unsubKey = key()
   const activateURL = config.Email.baseURL + 'email/' + activateKey
   await db.run('INSERT INTO emailsub (unsubkey, activatekey, email, uuid, active, created_at) VALUES '
-    + '(?, ?, ?, ?, 0, ?)', [unsubKey, activateKey, email, data.user_uuid, now()])
+    + '(?, ?, ?, ?, 0, ?)', [unsubKey, activateKey, email, data.id, now()])
 
   await emailTransport.sendMail({
     from: config.Email.from,
@@ -328,7 +337,7 @@ app.post('/publish', async (req, res) => {
 
   // Set channel streaming status
   db.run('UPDATE channels SET live_at=? WHERE id=?', Date.now(), streamer.id)
-  cache.live.push(streamer.name)
+  cache.live.push(streamer.id)
 
   // Send notifications
   if (!notifQueue.includes(streamer.user_uuid)) {