<?php
////////////////////////
// RequestManager.php //
// DigiErbe Tresor    //
////////////////////////

class RequestManager {

    private $requestDir;

    public function __construct(
        $dirName = '/requests'
    ) {
        $this->requestDir = __DIR__ . $dirName;
    }

    public function generateRequest($owner, $key) {
        if(!isset($owner) || !isset($key))
            return ['error'=>'Request could not be processed', 'status'=> 400];
        $requester = $_SERVER['PHP_AUTH_USER'];
        if($owner == $requester)
            return ['error'=>'You do not need to request access to your own keys', 'status'=> 400];
        $requestFileName = $this->requestDir . '/' . $owner . '.json';
        $openRequests = new stdClass();
        if(file_exists($requestFileName))
            $openRequests = json_decode(file_get_contents($requestFileName));
        foreach($openRequests->{$requester} as $request) {
            if($request->requested_key == $key)
                return ['error'=>'You already requested that key', 'status'=>400];
        }
        $newData = new StdClass();
        $newData->requested_key = $key;
        $newData->created = new DateTime()->format('c');
        if(!isset($openRequests->{$requester}));
            $openRequests->{$requester} = array();
        $dataIndex = count($openRequests->{$requester});
        $openRequests->{$requester}[$dataIndex] = $newData;
        if(!file_put_contents($requestFileName, json_encode($openRequests, JSON_PRETTY_PRINT)))
             return['error'=>'request cannot be stored on the server', 'status'=>400];
        return ['success'=>'Your request was registered successfully', 'status'=>200];
    }
}