plateforme-corres2math/server_files/controllers/view_file.php

<?php

if (!isset($_GET["file_id"])) {
	header("Location: $URL_BASE");
	exit();
}

if (!isset($_SESSION["user_id"]))
	require_once "server_files/403.php";

$id = htmlspecialchars($_GET["file_id"]);

$file = Document::fromId($id);

if ($file !== null) {
	$team = Team::fromId($file->getTeamId());;
	$trigram = $team->getTrigram();

	$user = User::fromId($file->getUserId());
	$type = $file->getType();

	if (($_SESSION["role"] == Role::PARTICIPANT || $_SESSION["role"] == Role::ENCADRANT) && $user->getId() != $_SESSION["user_id"])
		require_once "server_files/403.php";

	$surname = $user->getSurname();
	$first_name = $user->getFirstName();
	$name = "Autorisation de droit à l'image de $first_name $surname.pdf";

	header("Content-Type: application/pdf");
}
else {
	$question = Question::fromAttachedFile($id);
	if ($question != null)
	{
		$from = Team::fromId($question->getFrom());
		$to = Team::fromId($question->getTo());
		$mime_type = finfo_file(finfo_open(FILEINFO_MIME_TYPE), "$LOCAL_PATH/files/$id");
		$name = "Pièce jointe n°" . $question->getNumber() . " de l'équipe " . $from->getTrigram() . " pour l'équipe " . $from->getTrigram() . " (problème " . $question->getProblem() . ")";
		switch ($mime_type) {
			case "application/pdf":
				$name .= "pdf";
				break;
			case "image/png":
				$name .= ".png";
				break;
			case "image/jpg":
			case "image/jpeg":
				$name .= ".jpg";
				break;
			case "application/zip":
				$name .= ".zip";
				break;
		}
		header("Content-Type: " . $mime_type);
	}
	else
		require_once "server_files/404.php";
}

header("Content-Disposition: inline; filename=\"$name\"");

readfile("$LOCAL_PATH/files/$id");

exit();