index.js

// Generated by CoffeeScript 1.9.3
var randomString,
  hasProp = {}.hasOwnProperty;

randomString = function(length) {
  var string;
  if (length == null) {
    length = 32;
  }
  string = "";
  while (string.length < length) {
    string += Math.random().toString(36).substr(2);
  }
  return string.substr(0, length);
};

exports.check = function(model, permission, req, callback) {
  var clearance, key;
  if (!model.clearance || model.clearance.length === 0) {
    return callback(null, false);
  }
  if (model.clearance === 'public') {
    return callback(null, true);
  }
  if (!Array.isArray(model.clearance)) {
    return callback(new Error('malformed clearance'), false);
  }
  key = req.query.key;
  clearance = model.clearance.filter(function(clearance) {
    return clearance.key === key && -1 !== clearance.perm.indexOf(permission);
  });
  return callback(null, clearance[0] || false);
};

exports.make = function(model, permission, details) {
  var clearance, property, value;
  if (details == null) {
    details = {};
  }
  clearance = {
    perm: permission
  };
  for (property in details) {
    if (!hasProp.call(details, property)) continue;
    value = details[property];
    clearance[property] = value;
  }
  clearance.key = randomString();
  return clearance;
};

exports.add = function(model, permission, details, callback) {
  var clearance, ref, rule;
  if (callback == null) {
    ref = [{}, details], details = ref[0], callback = ref[1];
  }
  rule = exports.make(model, permission, details);
  clearance = model.clearance || [];
  clearance = clearance.concat(rule);
  return model.updateAttributes({
    clearance: clearance
  }, function(err) {
    return callback(err, rule.key);
  });
};

exports.revoke = function(model, details, callback) {
  var clearance, dontMatch;
  dontMatch = function(clearance) {
    var property, value;
    for (property in details) {
      if (!hasProp.call(details, property)) continue;
      value = details[property];
      if (clearance[property] !== value) {
        return true;
      }
    }
    return false;
  };
  clearance = model.clearance.filter(dontMatch);
  return model.updateAttributes({
    clearance: clearance
  }, callback);
};

exports.replace = function(model, newclearance, callback) {
  return model.updateAttributes({
    clearance: newclearance
  }, callback);
};

exports.controller = require('./controller');