用户分组权限

data-structure.js

/* 

This example shows how you can use your data structure as a basis for 
your Firebase security rules to implement role-based security. We store
each user by their Twitter uid, and use the following simplistic approach
for user roles:

0 - GUEST
10 - USER
20 - MODERATOR
99 - ADMINISTRATOR

This file shows the data structure, and the security-rules file below 
shows the corresponding security rules.

*/
 
{
    "users": {
        "twitter:12345": {
            "full-name": "Sara Robinson",
            "username": "SRobTweets",
            "role-value": 10
        },
        "twitter:56789": {
            "full-name": "Michael 'Kato' Wulf",
            "username": "katowulf",
            "role-value": 20
        }
        ....
    },
    "rooms": {
        "public-room-1": {
            "users": {
                "twitter:56789": 20,
                "twitter:12345": 10
            }
        },
        "admin-only-room": {
            "users": {
                "twitter:56789": 20
            }
        }
        ...
    },
    "messages": {
        "public-room-1": {
           -JVwTPcWMIt0J6Gbtrqh: {
                "user": "twitter:12345",
                "text": "Hello everyone!"
            }
            ...
        },
        "admin-only-room": {
            -JVwU5tLQRPbzXo4s_a1: {
                "user": "twitter:56789",
                "text": "This is a top secret message."
            }
            ...    
        }
    }
}