/**
* Stats of a problem
*
* @param Request $r
* @return array
* @throws ForbiddenAccessException
* @throws InvalidDatabaseOperationException
*/
public static function apiStats(Request $r)
{
// Get user
self::authenticateRequest($r);
// Validate request
self::validateRuns($r);
// We need to check that the user has priviledges on the problem
if (!Authorization::CanEditProblem($r['current_user_id'], $r['problem'])) {
throw new ForbiddenAccessException();
}
try {
// Array of GUIDs of pending runs
$pendingRunsGuids = RunsDAO::GetPendingRunsOfProblem($r['problem']->getProblemId());
// Count of pending runs (int)
$totalRunsCount = RunsDAO::CountTotalRunsOfProblem($r['problem']->getProblemId());
// List of verdicts
$verdict_counts = array();
foreach (self::$verdicts as $verdict) {
$verdict_counts[$verdict] = RunsDAO::CountTotalRunsOfProblemByVerdict($r['problem']->getProblemId(), $verdict);
}
// Array to count AC stats per case.
// Let's try to get the last snapshot from cache.
$problemStatsCache = new Cache(Cache::PROBLEM_STATS, $r['problem']->getAlias());
$cases_stats = $problemStatsCache->get();
if (is_null($cases_stats)) {
// Initialize the array at counts = 0
$cases_stats = array();
$cases_stats['counts'] = array();
// We need to save the last_id that we processed, so next time we do not repeat this
$cases_stats['last_id'] = 0;
// Build problem dir
$problem_dir = PROBLEMS_PATH . '/' . $r['problem']->getAlias() . '/cases/';
// Get list of cases
$dir = opendir($problem_dir);
if (is_dir($problem_dir)) {
while (($file = readdir($dir)) !== false) {
// If we have an input
if (strstr($file, '.in')) {
// Initialize it to 0
$cases_stats['counts'][str_replace('.in', '', $file)] = 0;
}
}
closedir($dir);
}
}
// Get all runs of this problem after the last id we had
$runs = RunsDAO::searchRunIdGreaterThan(new Runs(array('problem_id' => $r['problem']->getProblemId())), $cases_stats['last_id'], 'run_id');
// For each run we got
foreach ($runs as $run) {
// Build grade dir
$grade_dir = RunController::getGradePath($run);
// Skip it if it failed to compile.
if (file_exists("{$grade_dir}/compile_error.log")) {
continue;
}
// Try to open the details file.
if (file_exists("{$grade_dir}/details.json")) {
$details = json_decode(file_get_contents("{$grade_dir}/details.json"));
foreach ($details as $group) {
foreach ($group->cases as $case) {
if ($case->score > 0) {
$cases_stats['counts'][$case->name]++;
}
}
}
}
}
} catch (Exception $e) {
throw new InvalidDatabaseOperationException($e);
}
// Save the last id we saw in case we saw something
if (!is_null($runs) && count($runs) > 0) {
$cases_stats['last_id'] = $runs[count($runs) - 1]->getRunId();
}
// Save in cache what we got
$problemStatsCache->set($cases_stats, APC_USER_CACHE_PROBLEM_STATS_TIMEOUT);
return array('total_runs' => $totalRunsCount, 'pending_runs' => $pendingRunsGuids, 'verdict_counts' => $verdict_counts, 'cases_stats' => $cases_stats['counts'], 'status' => 'ok');
}
