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/* | |
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 |
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/*************************************************** | |
* Assuming you can't use priorities (e.g. they are already being used for something else) | |
* You can store the email addresses in an index and use that to match them to user ids | |
***************************************************/ | |
var fb = new Firebase(URL); | |
/** | |
* Looks up a user id by email address and invokes callback with the id or null if not found | |
* @return {Object|null} the object contains the key/value hash for one user |
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function go() { | |
var userId = prompt('Username?', 'Guest'); | |
checkIfUserExists(userId); | |
} | |
var USERS_LOCATION = 'https://SampleChat.firebaseIO-demo.com/users'; | |
function userExistsCallback(userId, exists) { | |
if (exists) { | |
alert('user ' + userId + ' exists!'); |
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