<?php
$servername = "localhost";
$username = "root";
$password = "xxxxxx";
//$currentDB;
$conn;

handleInMsg(); //this guy will call our constructive functions to make stuff happen



function ConnectMySQL($currentDB) { //Connects to DB
    $success = false;
    // Create connection
    if ($currentDB==null) {
        $conn = new mysqli($servername, $username, $password);
    }
    if ($currentDB!=null) {
        $conn = new mysqli($servername, $username, $password, $currentDB);
    }
    // Check connection
    if ($conn->connect_error) {
        //die("");
        $success = false;
        return $success;
    }
    $success = true;
    return $success;
}

function disconMySQL() {
    $conn->close();
}

function createDB($dbName) { //creates DB
    $success = false;
    $sql = "CREATE DATABASE IF NOT EXISTS ".$dbName;
    if ($conn->query($sql) === TRUE) {
        if (createTable()) {
            $success = true;
            return $success;
        } else {
            $success = false;
            return $success;
        }
    } else {
        $success = false;
        return $success;
    }

}

function createTable() { //automatically sets up tables for DB
    $success = false;
    $sql = "CREATE TABLE BoxSet (
    id INT(6) UNSIGNED AUTO_INCREMENT PRIMARY KEY,
    gap INT(6) UNSIGNED NOT NULL,
    length INT(6) UNSIGNED NOT NULL,
    currentTime TIMESTAMP
    )";

    if ($conn->query($sql) === TRUE) {
        $success = true;
        return $success;
    } else {
        $success = false;
        return $success;
    }
}

function insertData($gap, $length) {
    $sql = "INSERT INTO BoxSet (gap, length)
    VALUES ('".$gap."', '".$length."')";

    if ($conn->query($sql) === TRUE) {
        echo "New record created successfully";
    } else {
        echo "Error: " . $sql . "<br>" . $conn->error;
    }
}


function handleInMsg() { //listens for commands via post
    $command = $_POST["command"];
    if ($command == "insertData") {
        $postGap = $_POST["gap"];
        $postLength = $_POST["length"];
        insertData($postGap,$postLength);
        return;
    }
    if ($command == "connectNewDB") {
        $postNewDBName = $_POST["gap"];
        ConnectMySQL();
        createDB($postNewDBName);
        return;
    }
    if ($command == "connectEDB") {
        $postExistingDBName = $_POST["gap"];
        ConnectMySQL($postExistingDBName);
        return;
    }
    if ($command == "ping") {
        echo "pong";
    }
    if ($command == "disconnectDB") {
        disconMySQL();
        return;
    } else {
        echo "Command not recognized: ".$command;
    }
}
?>