opensocial.data.js

fetchData = function(key, p) {
	var d = new Deferred;
	var params = {};
	params[opensocial.IdSpec.Field.USER_ID]  = opensocial.IdSpec.PersonId.OWNER;
	params[opensocial.IdSpec.Field.GROUP_ID] = 'SELF';
	$.extend(params, p || {});
	var request = opensocial.newDataRequest();
	request.add(
		request.newFetchPersonAppDataRequest(opensocial.newIdSpec(params), key),
		key
	);
	request.send(function(data) {
		var response = data.get(key).getData();
		var ret;
		for (var n in response)
			ret = gadgets.json.parse(gadgets.util.unescapeString(response[n][key]));
		d.call.call(d, ret);
	});
	return d;
};

fetchOwnerData = fetchData;

fetchViewerData = function(key) {
	var params = {};
	params[opensocial.IdSpec.Field.USER_ID]  = opensocial.IdSpec.PersonId.VIEWER;
	params[opensocial.IdSpec.Field.GROUP_ID] = 'SELF';

	return fetchData(key, params);
};

updateData = function(key, value) {
	value = gadgets.json.stringify(value);

	var d = new Deferred;
	var request = opensocial.newDataRequest();
	request.add(
		request.newUpdatePersonAppDataRequest(opensocial.IdSpec.PersonId.VIEWER, key, value),
		key
	);
	request.send(d.call.bind(d));
	return d;
};

removeData = function(key) {
	if (!(key instanceof Array)) key = [key];
	var d = new Deferred;
	var request = opensocial.newDataRequest();
	request.add(
		request.newRemovePersonAppDataRequest(opensocial.IdSpec.PersonId.VIEWER, key),
		key
	);
	request.send(d.call.bind(d));
	return d;
};

fetchPerson = function(target) {
	var d = new Deferred;
	var request = opensocial.newDataRequest();
	request.add(
		request.newFetchPersonRequest(opensocial.IdSpec.PersonId[target.toUpperCase()]),
		target
	);
	request.send(function(data) {
		d.call.call(d, data.get(target).getData());
	});
	return d;
};

fetchOwner = function() { return fetchPerson('owner'); };

fetchViewer = function() { return fetchPerson('viewer'); };