plateforme-corres2math/server_files/model.php

<?php

function loadUserValues()
{
	$_SESSION["user"] = $_SESSION["team"] = null;
	unset($_SESSION["user"]);
	unset($_SESSION["role"]);
	unset($_SESSION["team"]);

	if (isset($_SESSION["user_id"])) {
		$user = $_SESSION["user"] = User::fromId($_SESSION["user_id"]);
		if ($user == null) {
			unset($_SESSION["user_id"]);
			return;
		}

		$_SESSION["role"] = $user->getRole();

		if ($user->getTeamId() !== null)
			$_SESSION["team"] = Team::fromId($user->getTeamId());
	}
}

function quitTeam($user_id = -1)
{
	global $DB, $URL_BASE;

	if ($user_id == -1)
		header("Location: $URL_BASE");

	$user_id = $user_id >= 0 ? $user_id : $_SESSION["user_id"];
	/** @var User $user */
	$user = User::fromId($user_id);
	$role = $user->getRole();

	if ($role == Role::ADMIN)
		return;

	if ($role == Role::PARTICIPANT)
		for ($i = 1; $i <= 5; ++$i)
			/** @noinspection SqlResolve */
			$DB->exec("UPDATE `teams` SET `participant_$i` = NULL WHERE `participant_$i` = $user_id;");
	else
		$DB->exec("UPDATE `teams` SET `encadrant` = NULL WHERE `encadrant` = $user_id;");
	$user->setTeamId(null);
	for ($i = 1; $i <= 4; ++$i) {
		/** @noinspection SqlResolve */
		$DB->exec("UPDATE `teams` SET `participant_$i` = `participant_" . strval($i + 1) . "`, `participant_" . strval($i + 1) . "` = NULL WHERE `participant_$i` IS NULL;");
	}

	$DB->exec("DELETE FROM `teams` WHERE `encadrant` IS NULL AND `participant_1` IS NULL;");
	$req = $DB->query("SELECT `file_id` FROM `documents` WHERE `user` = $user_id;");
	while (($data = $req->fetch()) !== false)
		unlink("$URL_BASE/files/" . $data["file_id"]);
	$DB->exec("DELETE FROM `documents` WHERE `user` = $user_id;");

	$_SESSION["team"] = null;
	unset($_SESSION["team"]);
}

function userExists($email)
{
	global $DB, $YEAR;

	$req = $DB->prepare("SELECT `id` FROM `users` WHERE `email` = ? AND `year` = '$YEAR';");
	$req->execute([$email]);
	return $req->fetch();
}

function teamExists($name)
{
	global $DB, $YEAR;

	$req = $DB->prepare("SELECT `id` FROM `teams` WHERE `name` = ? AND `year` = '$YEAR';");
	$req->execute([$name]);
	return $req->fetch();
}

function trigramExists($trigram)
{
	global $DB, $YEAR;

	$req = $DB->prepare("SELECT `id` FROM `teams` WHERE `trigram` = ? AND `year` = '$YEAR';");
	$req->execute([$trigram]);
	return $req->fetch();
}

function canValidate(Team $team)
{
	global $DB, $CONFIG;

	$can_validate = date("Y-m-d H:i:s") < $CONFIG->getInscriptionDate();
	$can_validate &= $team->getValidationStatus() == ValidationStatus::NOT_READY;
	$can_validate &= $team->getEncadrantId() != null;
	$can_validate &= $team->getParticipants()[2] != null;
	$can_validate &= preg_match("#[1-4]#", $team->getProblem());

	if ($team->getEncadrantId() != null) {
		$req = $DB->prepare("SELECT COUNT(*) AS `version` FROM `documents` WHERE `user` = ? AND `problem` = ?;");
		$req->execute([$team->getEncadrantId(), $team->getProblem()]);
		$d = $req->fetch();
		$can_validate &= $d["version"] > 0;
	}

	for ($i = 1; $i <= 5; ++$i) {
		if ($team->getParticipants()[$i] === NULL)
			continue;

		$req = $DB->prepare("SELECT COUNT(*) AS `version` FROM `documents` WHERE `user` = ? AND `problem` = ?;");
		$req->execute([$team->getParticipants()[$i], $team->getProblem()]);
		$d = $req->fetch();
		$can_validate &= $d["version"] > 0;
	}

	return $can_validate;
}

function printDocuments($documents)
{
	echo "<div class=\"alert alert-info\">\n";
	foreach ($documents as $document) {
		$file_id = $document->getFileId();
		$user = User::fromId($document->getUserId());
		$surname = $user->getSurname();
		$first_name = $user->getFirstName();
		$name = "Autorisation de droit à l'image";
		$version = $document->getVersion();
		echo "$name de $first_name $surname (version $version) : <a href=\"/file/$file_id\"><strong>Télécharger</strong></a><br />\n";
	}
	echo "</div>\n";
}

function getZipFile($problem, $team_id = -1)
{
	global $LOCAL_PATH;

	$zip = new ZipArchive();

	$file_name = tempnam("tmp", "corres2math-");

	if ($zip->open($file_name, ZipArchive::CREATE) !== true) {
		die("Impossible de créer le fichier zip.");
	}

	$data = Document::getAllDocuments($problem, $team_id);

	/** @var Document $file */
	foreach ($data as $file) {
		$file_id = $file->getFileId();
		$user = User::fromId($file->getUserId());
		$name = "Autorisation de droit à l'image de " . $user->getFirstName() . " " . $user->getSurname() . ".pdf";

		$zip->addFile("$LOCAL_PATH/files/$file_id", $name);
	}

	$zip->close();

	return $file_name;
}

function displayVideo($link)
{
	if (preg_match("#(https?\://|)(www\.|)youtube\.com\/watch\?v=(.*)#", $link, $matches)) {
		$code = $matches[3];
		echo "<center><iframe width=\"854px\" height=\"480px\" src=\"https://www.youtube.com/embed/$code\" frameborder=\"0\" allow=\"accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen></iframe></center><br />\n";
	}
	elseif (preg_match("#(https?\://|)(www\.|)vimeo\.com/([0-9]*)#", $link, $matches)) {
		$code = $matches[3];
		echo "<center><iframe src=\"https://player.vimeo.com/video/$code?color=3be6c3\" width=\"853\" height=\"480\" frameborder=\"0\" allow=\"autoplay; fullscreen\" allowfullscreen></iframe></center>";

	}
	elseif (preg_match("#(https?\://|)(www\.|)dailymotion\.com/video/(.*)#", $link, $matches)) {
		$code = $matches[3];
		echo "<center><iframe frameborder=\"0\" width=\"853\" height=\"480\" src=\"https://www.dailymotion.com/embed/video/$code\" allowfullscreen allow=\"autoplay\"></iframe></center>";
	}
}