provider.valid_request(req, function(err, isValid) {
if (err) {
if (err.message === 'Invalid Signature') {
return callback({'code': 401, 'msg': 'Invalid Signature'});
}
log.error({'err': err}, 'An LTI launch resulted in an error');
return callback({'code': 400, 'msg': err.message});
} else if (!isValid) {
log.warn('An LTI launch was invalid');
return callback({'code': 400, 'msg': 'Failed validation'});
}
// Create the course on the fly
var courseInfo = {
'name': req.body.context_title
};
if (toolId === 'assetlibrary') {
courseInfo.assetlibrary_url = req.headers.referer;
} else if (toolId === 'dashboard') {
courseInfo.dashboard_url = req.headers.referer;
} else if (toolId === 'engagementindex') {
courseInfo.engagementindex_url = req.headers.referer;
} else if (toolId === 'whiteboards') {
courseInfo.whiteboards_url = req.headers.referer;
}
CourseAPI.getOrCreateCourse(canvas_course_id, canvas, courseInfo, function(err, course) {
if (err) {
return callback(err);
}
// If the LTI launch did not provide a recognized Canvas enrollment state, mark the user inactive to
// keep them from surfacing as a course site member.
if (!_.includes(_.values(CollabosphereConstants.ENROLLMENT_STATE), canvas_enrollment_state)) {
canvas_enrollment_state = 'inactive';
}
// Site admins are likewise considered inactive.
if (_.includes(CollabosphereConstants.ADMIN_ROLES, canvas_course_role)) {
canvas_enrollment_state = 'inactive';
}
// Create the user on the fly
var defaults = {
'canvas_course_role': canvas_course_role,
'canvas_full_name': canvas_full_name,
'canvas_image': canvas_image,
'canvas_email': canvas_email,
'canvas_enrollment_state': canvas_enrollment_state
};
UsersAPI.getOrCreateUser(canvas_user_id, course, defaults, function(err, user) {
if (err) {
return callback(err);
}
// Store or update the user's analytics properties
AnalyticsAPI.identifyUser(user);
// Keep track of the URL that is performing the LTI launch
provider.body.tool_url = req.headers.referer;
// Keep track of whether this Canvas instance supports custom cross-window messaging
provider.body.supports_custom_messaging = canvas.supports_custom_messaging;
return callback(null, provider.body, user);
});
});
});
provider.valid_request(req, function(err, isValid) {
if (err) {
if (err.message === 'Invalid Signature') {
return callback({'code': 401, 'msg': 'Invalid Signature'});
}
log.error({'err': err}, 'An LTI launch resulted in an error');
return callback({'code': 400, 'msg': err.message});
} else if (!isValid) {
log.warn('An LTI launch was invalid');
return callback({'code': 400, 'msg': 'Failed validation'});
}
// Create the course on the fly
var courseInfo = {
'name': req.body.context_title
};
if (toolId === 'assetlibrary') {
courseInfo.assetlibrary_url = req.headers.referer;
} else if (toolId === 'dashboard') {
courseInfo.dashboard_url = req.headers.referer;
} else if (toolId === 'engagementindex') {
courseInfo.engagementindex_url = req.headers.referer;
} else if (toolId === 'whiteboards') {
courseInfo.whiteboards_url = req.headers.referer;
}
CourseAPI.getOrCreateCourse(canvas_course_id, canvas, courseInfo, function(err, course) {
if (err) {
return callback(err);
}
// By default, everyone who launches in an LTI tool is considered to be active
var canvas_enrollment_state = 'active';
// However, when a site admin launches the tool, we set their enrollment_state to
// `inactive` as they shouldn't really appear in the engagement index
if (_.includes(CollabosphereConstants.ADMIN_ROLES, canvas_course_role)) {
canvas_enrollment_state = 'inactive';
}
// Create the user on the fly
var defaults = {
'canvas_course_role': canvas_course_role,
'canvas_full_name': canvas_full_name,
'canvas_image': canvas_image,
'canvas_email': canvas_email,
'canvas_enrollment_state': canvas_enrollment_state
};
UsersAPI.getOrCreateUser(canvas_user_id, course, defaults, function(err, user) {
if (err) {
return callback(err);
}
// Store or update the user's analytics properties
AnalyticsAPI.identify(user);
// Keep track of the URL that is performing the LTI launch
provider.body.tool_url = req.headers.referer;
// Keep track of whether this Canvas instance supports custom cross-window messaging
provider.body.supports_custom_messaging = canvas.supports_custom_messaging;
return callback(null, provider.body, user);
});
});
});