StudySystemProtocol DEFINITIONS EXPLICIT TAGS ::= BEGIN

ActivityType ::= ENUMERATED {
	reading(0),
	exercises(1)
}

Session ::= SEQUENCE {
	subjectId INTEGER,
	type ActivityType,
	timestamp INTEGER,
	minutes INTEGER
}

Request ::= CHOICE {
	ping [0] NULL,
	listPrioritizedActivities [1] NULL,
	logSession [2] Session
}

PrioritizedActivity ::= SEQUENCE {
	subjectId INTEGER,
	subjectName UTF8String,
	type ActivityType,
	priority INTEGER
}

Error ::= ENUMERATED {
	invalidRequest(0),
	invalidArguments(1),
	serverError(2)
}

Response ::= CHOICE {
	error [0] Error,
	ack [1] NULL,
	prioritizedActivities [2] SEQUENCE OF PrioritizedActivity
}

END