feat: board opacity/background link with the room + start of screenshots feat

lib/data/redis.js

@@ -112,21 +112,31 @@ db.prototype = {
   },
 
   // Board metadata commands
-  createBoardMetas(room, id, board) {
-    const boardString = JSON.stringify(board)
+  createBoardMetas(room, id, metaObj) {
     redisClient.hset(
       `${REDIS_PREFIX}-room:${room}-board`,
       id,
-      boardString
+      JSON.stringify(metaObj)
     )
   },
+
   getBoardMetas(room, callback) {
     redisClient.hgetall(`${REDIS_PREFIX}-room:${room}-board`, (err, res) => {
-      console.log('board metas', res)
-      callback(JSON.parse(res))
+      const metas = {}
+      if (res) {
+        for (const key in res) {
+          try {
+            metas[key] = JSON.parse(res[key])
+          } catch (e) {
+            console.error('JSON error in board metas', key, res[key])
+          }
+        }
+      }
+      callback(metas)
     })
   },
 
+
   editBoardMetas(room, id, prop, value) {
     redisClient.hget(`${REDIS_PREFIX}-room:${room}-board`, id, (err, res) => {
       const board = JSON.parse(res)