index.php

<?php
require 'vendor/autoload.php';
require_once 'consts.php';
\Slim\Slim::registerAutoloader();

$app = new \Slim\Slim();
$app->view(new \JsonApiView());
$app->add(new \JsonApiMiddleware());

$app->get(
    '/',
    function () use ($app) {
        $app->render(
            200,
            array(
                'msg' => 'welcome to PraiseAPi!',
            )
        );
    }
);

$app->get(
    '/message/',
    function () use ($app) {
        messageGet($app);
    }
);
$app->post(
    '/praise/',
    function () use ($app) {
        praiseAdd($app);
    }
);

$app->get('/functest', 'selectMessages');
$app->post(
    '/users/',
    function () use ($app) {

        if ($app->request->post('user') !== '') {
            addUser($app);
        }
    }
);


function messageGet($app)
{
    $msg = selectMessages();
    $imageurl = getImageURL();
    $app->render(
        200,
        array(
            'user_name' => 'hoge',
            'message' => $msg,
            'image' => $imageurl
        )
    );
}

function praiseAdd($app)
{
    $jsonPosted = $app->request->getBody();
    $deserialize = json_decode($jsonPosted);
    $ret = file_put_contents(__DIR__ . DS . MESSAGES_FILENAME, $deserialize->{'message'} . "\n", FILE_APPEND | LOCK_EX);
    if ($ret === FALSE) {
        $app->render(
            500,
            array(
                'description' => 'insert error'
            )
        );
    }
    $app->render(
        200,
        array(
            'user_name' => 'hoge'
        )
    );
}

$app->run();

function selectMessages()
{
    // メッセージを全部呼びこむ
    $messages = file(__DIR__ . DS . MESSAGES_FILENAME);

    // メッセージ数確認
    $messagesLength = count($messages);
    // ランダム選択
    $selected = rand(0, $messagesLength - 1);
    return $messages[$selected];
}

function getImageURL()
{
    $img = getImage();
    $URL = $img;
    return $URL;
}

function getImage()
{
    $imagefiles = [];
    $res_dir    = opendir('./' . IMAGE_PATH);
    while ($file_name = readdir($res_dir)) {
        array_push($imagefiles, $file_name);
    }
    $imagelength = count($imagefiles);
    $selected    = rand(0, $imagelength - 1);
    $imgfile     = $imagefiles[$selected];
    closedir($res_dir);

    return $imgfile;
}