dbHandler.php

<?php
/*
  MySQL database handler
*/

class dbHandler
{
  private $dbIniFile = "../../db_config.ini";
  private $charset = "utf8";
  private $conn = null;
  private $alreadyConnected = false;
  private $configKeys = array(
    "server", "db", "username", "password", "eventcode", "tbakey",
    "fbapikey", "fbauthdomain", "fbdburl", "fbprojectid", "fbstoragebucket",
    "fbsenderid", "fbappid", "fbmeasurementid",
    "datatable", "tbatable", "pittable", "ranktable",
    "useP", "useQm", "useQf", "useSf", "useF"
  );

  function connectToDB()
  {
    if (!$this->alreadyConnected)
    {
      $dbConfig = $this->readDbConfig();
      $dsn = "mysql:host=" . $dbConfig["server"] . ";dbname=" . $dbConfig["db"] . ";charset=" . $this->charset;
      $opt = [
        PDO::ATTR_ERRMODE            => PDO::ERRMODE_EXCEPTION,
        PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
        PDO::ATTR_EMULATE_PREPARES   => false
      ];
      $this->conn = new PDO($dsn, $dbConfig["username"], $dbConfig["password"], $opt);
      $this->alreadyConnected = true;
    }
    return ($this->conn);
  }

  function connectToServer()
  {

    $dbConfig = $this->readDbConfig();
    $dsn = "mysql:host=" . $dbConfig["server"] . ";charset=" . $this->charset;
    $opt = [
      PDO::ATTR_ERRMODE            => PDO::ERRMODE_EXCEPTION,
      PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
      PDO::ATTR_EMULATE_PREPARES   => false
    ];
    $this->alreadyConnected = true;

    return (new PDO($dsn, $dbConfig["username"], $dbConfig["password"], $opt));
  }

  function writeRowToTable($data)
  {
    $dbConfig = $this->readDbConfig();
    $sql = "INSERT INTO " . $dbConfig["datatable"] . "(entrykey,
                       teamnumber,
                       exitcommunity,
                       autonconesbottom,
                       autonconesmiddle,
                       autonconestop,
                       autoncubesbottom,
                       autoncubesmiddle,
                       autoncubestop,
                       autonchargelevel,
                       teleopconesbottom,
                       teleopconesmiddle,
                       teleopconestop,
                       teleopcubesbottom,
                       teleopcubesmiddle,
                       teleopcubestop,
                       pickedupcube,
                       pickedupupright,
                       pickeduptipped,
                       endgamechargelevel,
                       died,
                       matchnumber,
                       eventcode,
                       scoutname,
                       comment)
                VALUES(:entrykey,
                       :teamnumber,
                       :exitcommunity,
                       :autonconesbottom,
                       :autonconesmiddle,
                       :autonconestop,
                       :autoncubesbottom,
                       :autoncubesmiddle,
                       :autoncubestop,
                       :autonchargelevel,
                       :teleopconesbottom,
                       :teleopconesmiddle,
                       :teleopconestop,
                       :teleopcubesbottom,
                       :teleopcubesmiddle,
                       :teleopcubestop,
                       :pickedupcube,
                       :pickedupupright,
                       :pickeduptipped,
                       :endgamechargelevel,
                       :died,
                       :matchnumber,
                       :eventcode,
                       :scoutname,
                       :comment)";
    $prepared_statement = $this->conn->prepare($sql);
    $prepared_statement->execute($data);
  }

  function enforceInt($val)
  {
    return intval($val);
  }

  function enforceDataTyping($data)
  {
    $out = array();
    foreach ($data as $row)
    {
      foreach ($row as $key => $value)
      {
        if ($key == "exitedcommunity" || $key == "autonconesbottom" || $key == "autonconesmiddle" || $key == "autonconestop" || $key == "autoncubesbottom" || $key == "autoncubesmiddle" || $key == "autoncubestop" || $key == "autonchargelevel" ||$key == "teleopconesbottom" || $key == "teleopconesmiddle" || $key == "teleopconestop" || $key == "teleopcubesbottom" || $key == "teleopcubesmiddle" || $key == "teleopcubestop" || $key == "pickedupcube" || $key == "pickedupupright" || $key == "pickeduptipped" || $key == "endgamechargelevel" || $key == "died")
        {
          $row[$key] = $this->enforceInt($value);
        }
        else
        {
          $row[$key] = $value;
        }
      }
      array_push($out, $row);
    }
    return $out;
  }

  function readAllData($eventCode)
  {
    $dbConfig = $this->readDbConfig();
    $sql = "SELECT teamnumber,
                     exitcommunity,
                     autonconesbottom,
                     autonconesmiddle,
                     autonconestop,
                     autoncubesbottom,
                     autoncubesmiddle,
                     autoncubestop,
                     autonchargelevel,
                     teleopconesbottom,
                     teleopconesmiddle,
                     teleopconestop,
                     teleopcubesbottom,
                     teleopcubesmiddle,
                     teleopcubestop,
                     pickedupcube,
                     pickedupupright,
                     pickeduptipped,
                     endgamechargelevel,
                     died,
                     matchnumber,
                     eventcode,
                     scoutname,
                     comment from " . $dbConfig["datatable"] . " where eventcode='" . $eventCode . "'";
    $prepared_statement = $this->conn->prepare($sql);
    $prepared_statement->execute();
    $result = $prepared_statement->fetchAll();
    return $this->enforceDataTyping($result);
  }

  function readTeamData($teamNumber, $eventCode)
  {
    $dbConfig = $this->readDbConfig();
    $sql = "SELECT teamnumber,
                     exitcommunity,
                     autonconesbottom,
                     autonconesmiddle,
                     autonconestop,
                     autoncubesbottom,
                     autoncubesmiddle,
                     autoncubestop,
                     autonchargelevel,
                     teleopconesbottom,
                     teleopconesmiddle,
                     teleopconestop,
                     teleopcubesbottom,
                     teleopcubesmiddle,
                     teleopcubestop,
                     pickedupcube,
                     pickedupupright,
                     pickeduptipped,
                     endgamechargelevel,
                     died,
                     matchnumber,
                     eventcode,
                     scoutname, 
                     comment from " . $dbConfig["datatable"] . " where
                     eventcode='" . $eventCode . "' AND
                     teamnumber='" . $teamNumber . "'";
    $prepared_statement = $this->conn->prepare($sql);
    $prepared_statement->execute();
    $result = $prepared_statement->fetchAll();
    return $this->enforceDataTyping($result);
  }

  function writeRowToPitTable($data)
  {
    $dbConfig = $this->readDbConfig();
    $sql = "INSERT INTO " . $dbConfig["pittable"] . "(entrykey,
                       eventcode,
                       teamnumber,
                       numbatteries,
                       pitorg,
                       spareparts,
                       computervision,
                       swerve,
                       proglanguage,
                       drivemotors,
                       preparedness)
                VALUES(:entrykey,
                       :eventcode,
                       :teamnumber,
                       :numbatteries,
                       :pitorg,
                       :spareparts,
                       :computervision,
                       :swerve,
                       :proglanguage,
                       :drivemotors,
                       :preparedness)";
    $prepared_statement = $this->conn->prepare($sql);
    $prepared_statement->execute($data);
  }

  function readPitData($eventCode)
  {
    $dbConfig = $this->readDbConfig();
    $sql = "SELECT teamnumber,
                     numbatteries,
                     pitorg,
                     spareparts,
                     computervision,
                     swerve,
                     proglanguage,
                     drivemotors,
                     preparedness from " . $dbConfig["pittable"] . " where
                     eventcode='" . $eventCode . "'";
    $prepared_statement = $this->conn->prepare($sql);
    $prepared_statement->execute();
    $result = $prepared_statement->fetchAll();
    return $result;
  }

  function createDB()
  {
    $dbConfig = $this->readDbConfig();
    $connection = $this->connectToServer();
    $statement = $connection->prepare('CREATE DATABASE IF NOT EXISTS ' . $dbConfig["db"]);
    if (!$statement->execute())
    {
      throw new Exception("createDB Error: CREATE DATABASE query failed.");
    }
  }

  function createDataTable()
  {
    $conn = $this->connectToDB();
    $dbConfig = $this->readDbConfig();
    $query = "CREATE TABLE " . $dbConfig["db"] . "." . $dbConfig["datatable"] . " (
            entrykey VARCHAR(60) NOT NULL PRIMARY KEY,
            teamnumber VARCHAR(6) NOT NULL,
            exitcommunity TINYINT UNSIGNED NOT NULL,
            autonconesbottom TINYINT UNSIGNED NOT NULL,
            autonconesmiddle TINYINT UNSIGNED NOT NULL,
            autonconestop TINYINT UNSIGNED NOT NULL,
            autoncubesbottom TINYINT UNSIGNED NOT NULL,
            autoncubesmiddle TINYINT UNSIGNED NOT NULL,
            autoncubestop TINYINT UNSIGNED NOT NULL,
            autonchargelevel TINYINT UNSIGNED NOT NULL,
            teleopconesbottom TINYINT UNSIGNED NOT NULL,
            teleopconesmiddle TINYINT UNSIGNED NOT NULL,
            teleopconestop TINYINT UNSIGNED NOT NULL,
            teleopcubesbottom TINYINT UNSIGNED NOT NULL,
            teleopcubesmiddle TINYINT UNSIGNED NOT NULL,
            teleopcubestop TINYINT UNSIGNED NOT NULL,
            pickedupcube TINYINT UNSIGNED NOT NULL,
            pickedupupright TINYINT UNSIGNED NOT NULL,
            pickeduptipped TINYINT UNSIGNED NOT NULL,
            endgamechargelevel TINYINT UNSIGNED NOT NULL,
            died TINYINT UNSIGNED NOT NULL,
            matchnumber VARCHAR(10) NOT NULL,
            eventcode VARCHAR(10) NOT NULL,
            scoutname VARCHAR(100) NOT NULL,
            comment VARCHAR(500) NOT NULL
        )";
    $statement = $conn->prepare($query);
    if (!$statement->execute())
    {
      throw new Exception("createTable Error: CREATE TABLE " . $dbConfig["datatable"] . " query failed.");
    }
  }

  function createTBATable()
  {
    $conn = $this->connectToDB();
    $dbConfig = $this->readDbConfig();
    $query = "CREATE TABLE " . $dbConfig["db"] . "." . $dbConfig["tbatable"] . " (
            requestURI VARCHAR(100) NOT NULL PRIMARY KEY,
            expiryTime BIGINT NOT NULL,
            response MEDIUMTEXT NOT NULL
        )";
    $statement = $conn->prepare($query);
    if (!$statement->execute())
    {
      throw new Exception("createTBATable Error: CREATE TABLE " . $dbConfig["tbatable"] . " query failed.");
    }
  }

  function createPitTable()
  {
    $conn = $this->connectToDB();
    $dbConfig = $this->readDbConfig();
    $query = "CREATE TABLE " . $dbConfig["db"] . "." . $dbConfig["pittable"] . " (
            entrykey VARCHAR(60) NOT NULL PRIMARY KEY,
            eventcode VARCHAR(10) NOT NULL,
            teamnumber VARCHAR(6) NOT NULL,
            numbatteries TINYINT UNSIGNED NOT NULL,
            pitorg TINYINT UNSIGNED NOT NULL,
            spareparts TINYINT UNSIGNED NOT NULL,
            computervision TINYINT UNSIGNED NOT NULL,
            swerve TINYINT UNSIGNED NOT NULL,
            proglanguage VARCHAR(20) NOT NULL,
            drivemotors VARCHAR(20) NOT NULL,
            preparedness TINYINT UNSIGNED NOT NULL
        )";
    $statement = $conn->prepare($query);
    if (!$statement->execute())
    {
      throw new Exception("createPitTable Error: CREATE TABLE " . $dbConfig["pittable"] . " query failed.");
    }
  }

  function createRankTable()
  {
    $conn = $this->connectToDB();
    $dbConfig = $this->readDbConfig();
    $query = "CREATE TABLE " . $dbConfig["db"] . "." . $dbConfig["ranktable"] . " (
            eventcode VARCHAR(10) NOT NULL,
            matchkey VARCHAR(60) NOT NULL,
            teamrank MEDIUMTEXT NOT NULL
        )";
    $statement = $conn->prepare($query);
    if (!$statement->execute())
    {
      throw new Exception("createRankingTable Error: CREATE TABLE " . $dbConfig["ranktable"] . " query failed.");
    }
  }

  function writeRowToRankTable($data)
  {
    $dbConfig = $this->readDbConfig();
    $sql = "INSERT INTO " . $dbConfig["ranktable"] . "(eventcode, matchkey, teamrank)
                VALUES(:eventcode, :matchkey, :teamrank)";
    $prepared_statement = $this->conn->prepare($sql);
    $prepared_statement->execute($data);
  }

  function readRawRankData($eventCode)
  {
    $dbConfig = $this->readDbConfig();
    $sql = "SELECT matchkey,
                     teamrank from " . $dbConfig["ranktable"] . " where
                     eventcode='" . $eventCode . "'";
    $prepared_statement = $this->conn->prepare($sql);
    $prepared_statement->execute();
    $result = $prepared_statement->fetchAll();
    return $result;
  }

  function readRankData($eventCode)
  {
    $rawRankData = $this->readRawRankData($eventCode);
    $rankData = array();
    $dataSize = sizeof($rawRankData);
    for ($i = 0; $i < $dataSize; $i++)
    {
      array_push($rankData, json_decode($rawRankData[$i]["teamrank"], True));
    }
    return $rankData;
  }

  function deleteRowFromRankTable($data)
  {
    $dbConfig = $this->readDbConfig();
    $sql = "DELETE FROM " . $dbConfig["ranktable"] . " WHERE eventcode = :eventcode AND matchkey = :matchkey AND teamrank = :teamrank LIMIT 1";
    $prepared_statement = $this->conn->prepare($sql);
    $prepared_statement->execute($data);
  }

  function readDbConfig()
  {
    // Read dbIniFile
    // If File doesn't exist, instantiate array as empty
    try
    {
      $ini_arr = parse_ini_file($this->dbIniFile);
    }
    catch (Exception $e)
    {
      $ini_arr = array();
    }
    // If required keys don't exist, instantiate them to default empty string
    foreach ($this->configKeys as $key)
    {
      if (!isset($ini_arr[$key]))
      {
        $ini_arr[$key] = "";
      }

      # Specific checking
      if ($key == "useP" || $key == "useQm" || $key == "useQf" || $key == "useSf" || $key == "useF")
      {
        if ($ini_arr[$key] == "")
        {
          $ini_arr[$key] = true;
        }
        else if ($ini_arr[$key] == "1" || $ini_arr[$key] == "true")
        {
          $ini_arr[$key] = true;
        }
        else
        {
          $ini_arr[$key] = false;
        }
      }
    }
    return $ini_arr;
  }

  function writeDbConfig($dat)
  {
    // Get values to write
    // If value is not in input, read from current DB config
    $currDBConfig = $this->readDbConfig();
    foreach ($dat as $key => $value)
    {
      $currDBConfig[$key] = $value;
    }
    // Build ini file string
    $data = "";
    foreach ($currDBConfig as $key => $value)
    {
      $data = $data . $key . "=" . $value . "\r\n";
    }
    // Write ini file string to actual file
    if ($fp = fopen($this->dbIniFile, 'w'))
    {
      $startTime = microtime(True);
      do
      {
        $writeLock = flock($fp, LOCK_EX);
        if (!$writeLock)
        {
          usleep(round(21350));
        }
      } while ((!$writeLock) and ((microtime(True) - $startTime) < 5));

      if ($writeLock)
      {
        fwrite($fp, $data);
        flock($fp, LOCK_UN);
      }
    }
    fclose($fp);
  }

  function getStatus()
  {
    $dbConfig = $this->readDbConfig();
    $out = array();
    //
    $out["server"]          = $dbConfig["server"];
    $out["db"]              = $dbConfig["db"];
    $out["tbakey"]          = substr($dbConfig["tbakey"], 0, 3) . "******";
    $out["eventcode"]       = $dbConfig["eventcode"];
    $out["username"]        = substr($dbConfig["username"], 0, 1) . "*****";
    $out["fbapikey"]        = substr($dbConfig["fbapikey"], 0, 1) . "*****";
    $out["fbauthdomain"]    = $dbConfig["fbauthdomain"];
    $out["fbdburl"]         = substr($dbConfig["fbdburl"], 0, 1) . "*****";
    $out["fbprojectid"]     = substr($dbConfig["fbprojectid"], 0, 1) . "*****";
    $out["fbstoragebucket"] = substr($dbConfig["fbstoragebucket"], 0, 1) . "*****";
    $out["fbsenderid"]      = substr($dbConfig["fbsenderid"], 0, 1) . "*****";
    $out["fbappid"]         = substr($dbConfig["fbappid"], 0, 1) . "*****";
    $out["fbmeasurementid"] = substr($dbConfig["fbmeasurementid"], 0, 1) . "*****";
    $out["dbExists"]        = false;
    $out["serverExists"]    = false;
    $out["dataTableExists"] = false;
    $out["tbaTableExists"]  = false;
    $out["pitTableExists"]  = false;
    $out["rankTableExists"] = false;
    $out["useP"]            = $dbConfig["useP"];
    $out["useQm"]           = $dbConfig["useQm"];
    $out["useQf"]           = $dbConfig["useQf"];
    $out["useSf"]           = $dbConfig["useSf"];
    $out["useF"]            = $dbConfig["useF"];

    //DB Connection
    try
    {
      $dsn = "mysql:host=" . $dbConfig["server"] . ";dbname=" . $dbConfig["db"] . ";charset=" . $this->charset;
      $conn = new PDO($dsn, $dbConfig["username"], $dbConfig["password"]);
      $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
      $out["dbExists"] = true;
    }
    catch (PDOException $e)
    {
      $out["DBExists"] = false;
    }
    //Server Connection
    try
    {
      $dsn = "mysql:host=" . $dbConfig["server"] . ";charset=" . $this->charset;
      $conn = new PDO($dsn, $dbConfig["username"], $dbConfig["password"]);
      $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
      $out["serverExists"] = true;
    }
    catch (PDOException $e)
    {
      $out["ServerExists"] = false;
    }
    // Table Connection
    try
    {
      $dsn = "mysql:host=" . $dbConfig["server"] . ";dbname=" . $dbConfig["db"] . ";charset=" . $this->charset;
      $conn = new PDO($dsn, $dbConfig["username"], $dbConfig["password"]);
      $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
      $val = $conn->query('SELECT * from ' . $dbConfig["datatable"]);
      $out["dataTableExists"] = true;
    }
    catch (PDOException $e)
    {
      $out["dataTableExists"] = false;
    }
    try
    {
      $dsn = "mysql:host=" . $dbConfig["server"] . ";dbname=" . $dbConfig["db"] . ";charset=" . $this->charset;
      $conn = new PDO($dsn, $dbConfig["username"], $dbConfig["password"]);
      $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
      $val = $conn->query('SELECT * from ' . $dbConfig["tbatable"]);
      $out["tbaTableExists"] = true;
    }
    catch (PDOException $e)
    {
      $out["tbaTableExists"] = false;
    }
    try
    {
      $dsn = "mysql:host=" . $dbConfig["server"] . ";dbname=" . $dbConfig["db"] . ";charset=" . $this->charset;
      $conn = new PDO($dsn, $dbConfig["username"], $dbConfig["password"]);
      $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
      $val = $conn->query('SELECT * from ' . $dbConfig["pittable"]);
      $out["pitTableExists"] = true;
    }
    catch (PDOException $e)
    {
      $out["pitTableExists"] = false;
    }
    try
    {
      $dsn = "mysql:host=" . $dbConfig["server"] . ";dbname=" . $dbConfig["db"] . ";charset=" . $this->charset;
      $conn = new PDO($dsn, $dbConfig["username"], $dbConfig["password"]);
      $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
      $val = $conn->query('SELECT * from ' . $dbConfig["ranktable"]);
      $out["rankTableExists"] = true;
    }
    catch (PDOException $e)
    {
      $out["rankTableExists"] = false;
    }
    return $out;
  }
}