stats:role:assistant
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Table of Contents
Assistant Role
Assistants have access to many procedures in the Exercise Management and Sheets section.
Parameter: Exercise Identifier
Procedures
Exercise Management
changeAttributes(ident uid, ident id, string lecture, string term) {
assume exists /account[uid]/admin || exists /account[uid]/assistant[id];
assume exists /exercise[id]; # implicitly true in OO implementations
update /exercise[id]/lecture lecture;
update /exercise[id]/term term;
}
Sheet and Group Management
createSheet(ident uid, ident id, ident sheetId, double maxPoints) {
assume exists /account[uid]/assistant[id];
assume exists /exercise[id];
assume not exists /exercise[id]/sheet[sheetId];
assume maxPoints >= 0;
insert /exercise[id] <sheet id=[sheetId] maxPoints=[maxPoints] />;
}
createGroup(ident uid, ident id, ident groupId, string day, string time, string location, integer maxSize) {
assume exists /account[uid]/assistant[id];
assume exists /exercise[id];
assume not exists /exercise[id]/group[groupId];
assume maxSize >= 0;
assume day = "Monday" || day = "Tuesday" || ...;
insert /exercise[id] <group id=[groupId] day=[day] time=[time] location=[location] curSize=[0] maxSize=[maxSize] />;
}
changeAttributes(ident uid, ident id, ident sheetId, double maxPoints) {
assume exists /account[uid]/assistant[id];
assume exists /exercise[id]/sheet[sheetId]; # implies the existence of the exercise
assume maxPoints >= 0;
assume /exercise[id]/student[x]/result[sheetId]/points <= maxPoints;
update /exercise[id]/sheet[sheetId]/maxPoints maxPoints;
}
changeAttributes(ident uid, ident id, ident groupId, string day, string time, string location, integer maxSize) {
assume exists /account[uid]/assistant[id];
assume exists /exercise[id]/group[groupId]; # implicitly true in OO implementations
assume maxSize >= 0;
assume /exercise[id]/group[groupId]/curSize <= maxSize;
update /exercise[id]/group[groupId]/day day;
update /exercise[id]/group[groupId]/time time;
update /exercise[id]/group[groupId]/location location;
update /exercise[id]/group[groupId]/maxSize maxSize;
}
deleteSheet(ident uid, ident id, ident sheetId) {
assume exists /account[uid]/assistant[id];
assume exists /exercise[id]/sheet[sheetId]; # implies existence of the exercise
assume size(/exercise[id]/student/result[sheetId]) = 0;
remove /exercise[id]/sheet[sheetId];
}
deleteGroup(ident uid, ident id, ident groupId) {
assume exists /account[uid]/assistant[id];
assume exists /exercise[id]/group[groupId];
assume size(/exercise[id]/group[groupId]/tutor) = 0;
assume count(groupId, /exercise[id]/student/group)) = 0;
remove /exercise[id]/group[groupId];
}
Tutor Management
grantTutorRights(ident uid, ident username, ident exerciseId, ident groupId) {
assume exists /account[uid]/assistant[exerciseId];
assume exists /account[username]; # implicitly true in OO implementations
assume exists /exercise[exerciseId]/group[groupId];
assume not exists /account[username]/tutor[exerciseId]/group[groupId]);
assume not exists /exercise[exerciseId]/group[groupId]/tutor[username];
# implied by integrity and the assumption before
if not exists /account[username]/tutor[exerciseId] then # we could split the tutor rights here
insert /account[username] <tutor exercise=[exerciseId] />;
fi
insert /account[username]/tutor[exerciseId] <group id=[groupId] />;
insert /exercise[exerciseId]/group[groupId] <tutor account=[account] />;
}
revokeTutorRights(ident uid, ident username, ident exerciseId, ident groupId) {
assume exists /account[uid]/assistant[exerciseId];
assume exists /account[username]/tutor[exerciseId]/group[groupId];
assume exists /exercise[exerciseId]/group[groupId]/tutor[username];
# implied by integrity and the assumption before
remove /account[username]/tutor[exerciseId]/group[groupId];
if size(/account[username]/tutor[exerciseId]/group) = 0 then # should this be an additional procedure?
remove /account[username]/tutor[exerciseId];
fi
remove /exercise[exerciseId]/group[groupId]/tutor[username];
}
Student Management
signUpGroup(ident uid, ident id, ident studentId, ident groupId) {
assume exists /exercise[id] && /exercise[id]/open &&
exists /account[uid]/student && /account[uid]/student/id = studentId
|| exists /account[uid]/assistant[id];
assume exists /exercise[id]/student[studentId]; # implies the existence of the exercise
assume exists /exercise[id]/group[groupId]; # also implies it, but once is really enough
assume not exists /exercise[id]/student[studentId]/group;
assume /exercise[id]/group[groupId]/curSize < /exercise[id]/group[groupId]/maxSize;
insert /exercise[id]/student[studentId]/group groupId;
update /exercise[id]/group[groupId]/curSize (/exercise[id]/group[groupId]/curSize + 1);
}
signOutGroup(ident uid, ident id, ident studentId) {
assume exists /exercise[id] && /exercise[id]/open &&
exists /account[uid]/student && /account[uid]/student/id = studentId
|| exists /account[uid]/assistant[id];
assume exists /exercise[id]/student[studentId]/group;
# implies existence of the exercise and student, even the group
update /exercise[id]/group[/exercise[id]/student[studentId]/group]/curSize
(/exercise[id]/group[/exercise[id]/student[studentId]/group]/curSize - 1)
remove /exercise[id]/student[studentId]/group;
}
addResult(ident uid, ident id, ident studentId, ident sheetId, double points) {
assume exists /account[uid]/assistant[id]
|| exists /account[uid]/tutor[id]/group[/exercise[id]/student[studentId]/group];
assume exists /exercise[id]/student[studentId]; # implies the existence of the exercise
assume exists /exercise[id]/sheet[sheetId]; # dito
assume not exists /exercise[id]/student[studentId]/result[sheetId];
assume points >= 0 && points <= /exercise[id]/sheet[sheetId]/maxPoints;
insert /exercise[id]/student[studentId] <result sheet=[sheetId] points=[points] />;
}
removeResult(ident uid, ident id, ident studentId, ident sheetId) {
assume exists /account[uid]/assistant[id]
|| exists /account[uid]/tutor[id]/group[/exercise[id]/student[studentId]/group];
assume exists /exercise[id]/student[studentId]/result[sheetId]; # implies the existence of pretty much everything
remove /exercise[id]/student[studentId]/result[sheetId];
}
stats/role/assistant.1317249983.txt.gz · Last modified: 2011/09/29 00:46 by Patrick Michel
