sync-function.json

{
    "scopes": {
       "_default": {
          "collections": {
             "lists": {
                "sync": `
function(doc, oldDoc, meta) { 
    var owner = doc._deleted ? oldDoc.owner : doc.owner;
    requireUser(owner);

    var listChannel = 'lists.' + doc._id;
    var contributorRole = 'role:' + listChannel + '.contributor';
    role(owner, contributorRole);
    access(contributorRole, listChannel);
    
    channel(listChannel);
}
`
             },
             "tasks": {
                "sync": `
function(doc, oldDoc, meta) {
    var listId = doc._deleted ? oldDoc.taskList.id : doc.taskList.id;

    var listChannel = 'lists.' + listId;
    var contributorRoleName = listChannel + '.contributor';
    var contributorRole = 'role:' + contributorRoleName;
    
    requireRole(contributorRoleName);

    var tasksChannel = listChannel + '.tasks';
    access(contributorRole, tasksChannel);
    channel(tasksChannel);
} 
`
             },
             "users": {
                "sync": `
function(doc, oldDoc, meta) {
    var owner = doc._deleted ? oldDoc.taskList.owner : doc.taskList.owner;
    requireUser(owner);

    var listId = doc._deleted ? oldDoc.taskList.id : doc.taskList.id;
    var listChannel = 'lists.' + listId;
    var contributorRole = 'role:' + listChannel + '.contributor';

    if (!doc._deleted) {
        var username = doc._deleted ? oldDoc.username : doc.username;
        role(username, contributorRole);
    }
    
    var usersChannel = listChannel + '.users';
    access(owner, usersChannel);
    channel(usersChannel);
} 
`
             }
          }
       }
    }
 }