/// <summary>
/// Downloads the submissions for a given checkpoint, according to the
/// options specified by the user, in the form of a zip archive.
/// </summary>
public async Task <Stream> DownloadSubmissionsAsync(
string classroomName,
string projectName,
string checkpointName,
IList <int> selectedUserIds,
ProjectSubmissionDownloadFormat format)
{
var checkpoint = await LoadCheckpointAsync
(
classroomName,
projectName,
checkpointName
);
var allCheckpointSubmissions = GetCheckpointSubmissionsQuery
(
checkpoint,
section: null // Include all sections
);
var selectedUserIdsHash = new HashSet <int>(selectedUserIds);
var userIdsWithSubmissions = new HashSet <int>
(
await allCheckpointSubmissions
.Where(submission => selectedUserIdsHash.Contains(submission.Commit.UserId))
.GroupBy(submission => submission.Commit.User)
.Select(group => group.Key.Id)
.ToListAsync()
);
var sectionMemberships = await LoadSectionMembershipsAsync(classroomName);
var studentDownloadRequests = sectionMemberships
.Where
(
sm => selectedUserIdsHash.Contains(sm.ClassroomMembership.UserId)
)
.Select
(
sm => new StudentDownloadRequest
(
sm.ClassroomMembership,
userIdsWithSubmissions.Contains(sm.ClassroomMembership.User.Id)
)
)
.ToList();
var templateContents = await _submissionDownloader.DownloadTemplateContentsAsync
(
checkpoint.Project
);
var submissionContents = await _submissionDownloader.DownloadSubmissionsAsync
(
checkpoint,
studentDownloadRequests
);
return(await _submissionArchiveBuilder.BuildSubmissionArchiveAsync
(
checkpoint.Project,
templateContents,
submissionContents,
format
));
}
/// <summary>
/// Downloads all submissions for a given checkpoint in a section,
/// in the form of a zip archive. The archive will also include
/// the latest state of repositories for which there is no submission.
/// </summary>
public async Task <Stream> DownloadSubmissionsAsync(
string classroomName,
string projectName,
string checkpointName,
string sectionName)
{
var section = await LoadSectionAsync(classroomName, sectionName);
var checkpoint = await LoadCheckpointAsync
(
classroomName,
projectName,
checkpointName
);
var students = await _dbContext.ClassroomMemberships
.Where
(
cm => cm.SectionMemberships.Any
(
sm => sm.SectionId == section.Id &&
sm.Role == SectionRole.Student
)
)
.Include(cm => cm.User)
.ToListAsync();
var allCheckpointSubmissions =
await GetCheckpointSubmissionsQuery(checkpoint, section)
.ToListAsync();
var usersWithSubmissions = new HashSet <User>
(
allCheckpointSubmissions
.GroupBy(submission => submission.Commit.User)
.Select(group => group.Key)
.ToList()
);
var studentDownloadRequests = students
.Select
(
student => new StudentDownloadRequest
(
student,
usersWithSubmissions.Contains(student.User)
)
).ToList();
var templateContents = await _submissionDownloader.DownloadTemplateContentsAsync
(
checkpoint.Project
);
var submissionContents = await _submissionDownloader.DownloadSubmissionsAsync
(
checkpoint,
studentDownloadRequests
);
return(await _submissionArchiveBuilder.BuildSubmissionArchiveAsync
(
checkpoint.Project,
templateContents,
submissionContents
));
}
