Handle player redirects on screen slug change

src/player.js

@@ -396,27 +396,32 @@ async function start() {
       if (!command) {
         return res.status(400).json({ error: 'Command is required' });
       }
-        if (['refresh', 'reload', 'pause', 'blackout', 'previous', 'next', 'left', 'right'].indexOf(command) === -1) {
+      if (['refresh', 'reload', 'redirect', 'pause', 'blackout', 'previous', 'next', 'left', 'right'].indexOf(command) === -1) {
         return res.status(400).json({ error: 'Unsupported command' });
       }
 
-      const [screenRows] = await pool.query('SELECT id, name, slug FROM screens WHERE slug = ?', [req.params.slug]);
-      if (!screenRows.length) {
-        return res.status(404).json({ error: 'Screen not found' });
+      const isRedirectCommand = command === 'redirect';
+      let screenRows = [];
+      if (!isRedirectCommand) {
+        [screenRows] = await pool.query('SELECT id, name, slug FROM screens WHERE slug = ?', [req.params.slug]);
+        if (!screenRows.length) {
+          return res.status(404).json({ error: 'Screen not found' });
+        }
       }
 
-      const commandPayload = command === 'blackout' && blackoutValue !== undefined
-        ? {
-            command: command,
-            blackout: blackoutValue
-          }
+      const commandPayload = req.body && typeof req.body === 'object' && !Array.isArray(req.body)
+        ? Object.assign({}, req.body, { command: command })
         : command;
+      if (command === 'blackout' && blackoutValue !== undefined && commandPayload && typeof commandPayload === 'object') {
+        commandPayload.blackout = blackoutValue;
+      }
 
       const sent = connectionId
         ? sendCommandToConnection(req.params.slug, connectionId, commandPayload)
         : broadcastCommand(req.params.slug, commandPayload);
+
       res.json({
-        screen: screenRows[0],
+        screen: screenRows[0] || null,
         screenSlug: req.params.slug,
         command: command,
         connectionId: connectionId || null,