process_text.php

<?php

    header("content-type: text/xml");
    echo "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n";

    $_procStart = microtime();
    require_once "game_engine/game_constants.php";
    require_once "game_engine/game_engine.php";

    // Collect the posted array
    $_arrPOST = $_POST;

    // Check to see if we have POST vars, if not set up some test vars.
    if (!isset($_arrPOST["Body"])) {
        $_arrPOST["SmsSid"] = "test";
        $_arrPOST["From"] = "localtest";
        $_arrPOST["Body"] = "south";
    }

    // Check to see if the user has played before
    $_returnText = array();
    $dbEngine = new dbEngine();
    $hasCallerPlayedBefore = $dbEngine->hasCallerPlayedBefore($_arrPOST["From"]);
    if ($hasCallerPlayedBefore === false) {
        $_returnText[] = $dbEngine->getTextForAudioID("game_start");
        $_returnText[] = $dbEngine->getTextForAudioID("call_costs");
        $_arrPOST["Body"] = "";
    } else {
        $_arrPOST["Body"] = strtolower($_arrPOST["Body"]);
        $hasCallerCompletedGame = $dbEngine->hasCallerCompletedGame($_arrPOST["From"]);
        if ($hasCallerCompletedGame === true) {
            if ($_arrPOST["Body"] == TEXT_COMMAND_RESET) {
                $dbEngine->resetPlayerEntry($_arrPOST["From"]);
                $_arrPOST["Body"] = null;
            } else {
                $_returnText[] = $dbEngine->getTextForAudioID("reset_game");
            }
        }
    }

    // Setup a new game engine session
    $_playingByText = true;
    $_gameEngine = new gameEngine($_arrPOST, $_playingByText);

    // What did the user want to do?
    if (isset($_arrPOST["Body"]) && !empty($_arrPOST["Body"])) {
        if (in_array($_arrPOST["Body"], array(TEXT_COMMAND_NORTH, TEXT_COMMAND_SOUTH, TEXT_COMMAND_EAST, TEXT_COMMAND_WEST))) {
            $checkAction = $_gameEngine->processAction();
            if (!$checkAction) {
                $_returnText[] = $_gameEngine->getResponseForInvalidMove();
            }
        } else {
            $_returnText[] = $_gameEngine->getResponseForInvalidKeyPress();
        }
    } elseif ($hasCallerPlayedBefore === true) {
        $_returnText[] = $dbEngine->getTextForAudioID("game_start");
        $_returnText[] = $dbEngine->getTextForAudioID("call_costs");
    }

    // Get the audio files we need to play
    $_sendText = $_gameEngine->getResponse();
    foreach ($_sendText as $text) {
        $_returnText[] = $text;
    }

    // Create the outgoing Twilio XML and echo it to the session
    $_returnXML = $_gameEngine->createReturnXMLForSMS($_returnText);

    // -----------------------------------------------------
    $_procEnd = microtime();
    $_procComplete = $_procEnd - $_procStart;

    // Log this information in the db as a game move
    $_gameEngine->logEvent($_procComplete);

    // Last job is to echo out the return XML to Twilio
    echo "\n".$_returnXML;

?>