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<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" integrity="sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO" crossorigin="anonymous">
        <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/handlebars.js/4.0.11/handlebars.min.js"></script>
        <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
    </head>
    <script id="body-template" type="text/x-handlebars-template">
        <div class="container">
            <div class="alert alert-secondary" role="alert">
                <strong>Please note:</strong> All flags are case-sensitive and look like <samp>CIRCUS{IS_REALLY_C00L}</samp>.
            </div>
            {{#each challenges}}
                <div class="card {{#if foundFlag}}border-success{{/if}}" style="margin-bottom: 20px">
                    <div class="card-header">
                        {{ name }}
                        <span class="badge badge-light">
                            {{ category }}
                        </span>
                    </div>
                    <div class="card-body">
                        <p>
                            {{{ description }}}
                        </p>
                        {{#if foundFlag}}
                            <p class="text-success">Flag found!</p>
                        {{else}}
                            <form class="input-group mb-3" onsubmit="event.preventDefault();submitThis(this);">
                                <input type="hidden" name="challengeName" value="{{ name }}">
                                <input type="text" class="form-control" aria-label="Flag" aria-describedby="button-submit" name="flag">
                                <div class="input-group-append">
                                    <button class="btn btn-outline-primary" type="submit" id="button-submit">Submit flag</button>
                                </div>
                            </form>
                        {{/if}}
                    </div>
                </div>
            {{/each}}
        </div>
    </script>
    <body>
        <nav class="navbar navbar-expand-md navbar-dark bg-dark mb-4">
            <a class="navbar-brand" href="/">Companion</a>
            <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarCollapse" aria-controls="navbarCollapse" aria-expanded="false" aria-label="Toggle navigation">
                <span class="navbar-toggler-icon"></span>
            </button>
            <div class="collapse navbar-collapse" id="navbarCollapse">
                <ul class="navbar-nav mr-auto">
                    <li class="nav-item">
                        <a class="nav-link" href="/">Home <span class="sr-only">(current)</span></a>
                    </li>
                    <li class="nav-item active">
                        <a class="nav-link" href="/challenges">Challenges</a>
                    </li>
                </ul>
                <form class="form-inline mt-2 mt-md-0" action="/logout" method="post">
                    <button class="btn btn-outline-danger my-2 my-sm-0" type="submit">Logout</button>
                </form>
            </div>
        </nav>
        <main class="container" role="main" id="challenge-list">
            <div class="alert alert-info" role="alert">
                Loading challenges...
            </div>
        </main>
    </body>
    <script type="text/javascript">
        var template = Handlebars.compile($("#body-template").html());

        function loadChallengesAndRender() {
            $.ajax({
                url: "/api/getChallenges",
                success: function(result) {
                    $("#challenge-list").html(
                        template(jQuery.parseJSON(result))
                    );
                }
            });
        }

        function submitThis(t) {
            submitFlag($(t).find('[name=challengeName]').val(), $(t).find('[name=flag]'));
        }

        function submitFlag(challengeName, flagObject) {
            $.post("/api/submitFlag", {
                "challengeName": challengeName,
                "flag": flagObject.val()
            }).done(function(data) {
                var result = jQuery.parseJSON(data);
                if(result["correctFlag"] == "true") {
                    // yay!
                    loadChallengesAndRender();
                } else {
                    // nay!
                    flagObject.addClass("alert-danger").blur();
                }
            });
        }

        $(document).ready(function() {
            loadChallengesAndRender();
        });
    </script>
</html>