<?php
require __DIR__ . '/medoo.php';
require_once __DIR__ . '/../../config.php';

class EmailTracker {
    /**
     * @var Database connector object. A medoo object.
     */
    private $dbObj;

    /**
     * Contructor
     */
    function __construct() {
        $dbOptions = array(
            'database_type' => 'mysql',
            'database_name' => PLUGIN_EMAILTRACKING_DB_DB,
            'server' => PLUGIN_EMAILTRACKING_DB_HOST,
            'username' => PLUGIN_EMAILTRACKING_DB_USER,
            'password' => PLUGIN_EMAILTRACKING_DB_PASS,
            'port' => PLUGIN_EMAILTRACKING_DB_PORT,
            'charset' => 'utf8',
        );
        $this->dbObj = new medoo($dbOptions);
    }

    /**
     * Generates a new ID out of some values
     *
     * @param $emailId
     * @param $destAddr
     * @param $srcAddr
     * @param $subject
     * @return string
     */
    public function getNewTrackingCode ($emailId, $destAddr, $srcAddr, $subject) {
        $currentTimeStamp = time();

        $trackingHash = md5($emailId . $destAddr . $subject . $currentTimeStamp);

        $data = array(
            "email_id" => $emailId,
            "destination_addr" => $destAddr,
            "source_addr" => $srcAddr,
            "subject" => $subject,
            "current_time" => date('Y-m-d H:i:s',$currentTimeStamp),
            "generated_id" => $trackingHash
        );
        $this->dbObj->insert("trackingid", $data);

        return $trackingHash;
    }

    /**
     * Get the database ID for the given hash
     *
     * @param $trackingHash
     * @return int
     */
    private function getTrackingIDbyCode ($trackingHash) {
        $filter = array(
            "generated_id" => $trackingHash,
        );

        $data = $this->dbObj->select("trackingid", "id", $filter);

        if (is_array($data) && count($data) > 0) {
            return $data[0];
        } else {
            return -1;
        }
    }

    /**
     * Stores a new log entry to db
     *
     * @param $trackingHash
     * @param $data
     */
    public function addLog($trackingHash, $data) {
        // first get the id - to add it to our new entry
        $dbID = $this->getTrackingIDbyCode($trackingHash);

        // check if trackingHash was valid
        if($dbID != -1) {
            // build our tracking entry
            $data["trackingid_id"] = $dbID;

            $this->dbObj->insert("trackinglog", $data);
        }
    }

    /**
     * Get all Tracking logs for the specified hash.
     *
     * @param $trackingHash
     * @return array|bool
     */
	public function getAllLogs($trackingHash) {
        // first get the id - to add it to our new entry
        $dbID = $this->getTrackingIDbyCode($trackingHash);

        // check if trackingHash was valid
        if($dbID != -1) {
            $data = $this->dbObj->select("trackinglog", [
                "ip_addr",
                "timestamp",
                "referrer",
                "client",
                "tracking_type"
            ], [
                "trackingid_id" => $dbID
            ]);

            return $data;
        }

        return false;
	}
}