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<html>
<head>
<script src="../build/axolotl.js"></script>
<script>

document.addEventListener("DOMContentLoaded", function (event) {
    function progress(who, message) {
        var message_element = document.createElement("pre");
        var progress = document.getElementById(who + "_progress");
        var start_content = document.createTextNode(message + "...");
        var done_content = document.createTextNode(message + "... Done");
        function start() {
            message_element.appendChild(start_content);
            progress.appendChild(message_element);
        }
        function done() {
            message_element.replaceChild(done_content, start_content);
        }
        return {start:start, done:done};
    }

    var alice = new Axolotl.Account();
    var bob = new Axolotl.Account();
    var a_session = new Axolotl.Session();
    var b_session = new Axolotl.Session();
    var message_1;
    var tasks = [];

    tasks.push(["alice", "Creating account", function() { alice.create() }]);
    tasks.push(["bob", "Creating account", function() { bob.create() }]);
    tasks.push(["alice", "Create outbound session", function() {
        var bobs_keys_1 = JSON.parse(bob.identity_keys())[0];
        var bobs_keys_2 = JSON.parse(bob.one_time_keys())[1];
        a_session.create_outbound(
            alice, bobs_keys_1[1], bobs_keys_2[0], bobs_keys_2[1]
        );
    }]);
    tasks.push(["alice", "Encrypt first message", function() {
        message_1 = a_session.encrypt("");
    }]);
    tasks.push(["bob", "Create inbound session", function() {
        b_session.create_inbound(bob, message_1.body);
    }]);
    tasks.push(["bob", "Decrypt first message", function() {
        b_session.decrypt(message_1.type, message_1.body);
    }]);

    function glue_encrypt(from, to, from_session) {
        var plain_input = document.getElementById(from + "_plain_input");
        var cipher_output = document.getElementById(from + "_cipher_output");
        var cipher_input = document.getElementById(to + "_cipher_input");
        var encrypt = document.getElementById(from + "_encrypt");

        encrypt.addEventListener("click", function() {
            var message = from_session.encrypt(plain_input.value);
            var message_element = document.createElement("pre");
            var content = document.createTextNode(JSON.stringify(message));
            message_element.appendChild(content);
            cipher_output.appendChild(message_element);
            message_element.addEventListener("click", function() {
                cipher_input.value = JSON.stringify(message);
            }, false);
        }, false);
    }

    function glue_decrypt(to, to_session) {
        var cipher_input = document.getElementById(to + "_cipher_input");
        var plain_output = document.getElementById(to + "_plain_output");
        var decrypt = document.getElementById(to + "_decrypt");

        decrypt.addEventListener("click", function() {
            var message = JSON.parse(cipher_input.value);
            try {
                var plaintext = to_session.decrypt(message.type, message.body);
            } catch (e) {
                var plaintext = "ERROR: " + e.message;
            }
            var message_element = document.createElement("pre");
            var message_content = document.createTextNode(plaintext);
            message_element.appendChild(message_content);
            plain_output.appendChild(message_element);
        }, false);
    }

    function do_tasks(next) {
        if (tasks.length > 0) {
            var task = tasks.shift();
            var p = progress(task[0], task[1])
            p.start();
            window.setTimeout(function() {
                task[2]();
                p.done();
                window.setTimeout(do_tasks, 0, next);
            }, 0)
        } else {
            next();
        }
    }

    do_tasks(function() {
        glue_encrypt("alice", "bob", a_session);
        glue_decrypt("bob", b_session);

        glue_encrypt("bob", "alice", b_session);
        glue_decrypt("alice", a_session);
    });
 }, false);

</script>
<body>
<div id="alice">
    <h1>Alice</h1>
    <div id="alice_progress"></div>
    <h2>Encryption</h2>
    <textarea id="alice_plain_input"></textarea>
    <button id="alice_encrypt">Encrypt</button>
    <div id="alice_cipher_output"></div>
    <h2>Decryption</h2>
    <textarea id="alice_cipher_input"></textarea>
    <button id="alice_decrypt">Decrypt</button>
    <div id="alice_plain_output"></div>
</div>
<div id="bob">
    <h1>Bob</h1>
    <div id="bob_progress"></div>
    <h2>Encryption</h2>
    <textarea id="bob_plain_input"></textarea>
    <button id="bob_encrypt">Encrypt</button>
    <div id="bob_cipher_output"></div>
    <h2>Decryption</h2>
    <textarea id="bob_cipher_input"></textarea>
    <button id="bob_decrypt">Decrypt</button>
    <div id="bob_plain_output"></div>
</div>
</body>
</html>