client/index.html


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<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8"/>
        <title>Radio Station Emulator</title>
        <meta name="viewport" content="width=device-width, initial-scale=1">
        <link rel="stylesheet preload" href="./css/styles.css" type="text/css" as="style"/>
    </head>
    <body>
        <div>
            <div class="header">
                <img class="logo" src="./img/logo.jpg"/>
                <div>
                    <h1>Radio Station Emulator</h1>
                    <em>by <a href="https://kaotisk-hund.com/" target="_blank">Kaotisk Hund</a>, for <a href="https://arching-kaos.org" target="_blank">Arching Kaos</a> and for everyone.</em>
                </div>
            </div>
            <div class="main">
                <div class="start-top">
                    <div class="div-groups" style="flex-grow:1;">
                        <div class="now-playing-details">
                            <div class="div-groups-row">
                                <img class="generated"/>
                                <table>
                                    <tr>
                                        <th>Artist</th>
                                        <td class="artist"></td>
                                    </tr>
                                    <tr>
                                        <th>Title</th>
                                        <td class="title"></td>
                                    </tr>
                                    <tr>
                                        <th>Starts On (ms)</th>
                                        <td class="starts-on"></td>
                                    </tr>
                                    <tr>
                                        <th>Duration (s)</th>
                                        <td class="show-duration"></td>
                                    </tr>
                                </table>
                            </div>
                        </div>
                        <div class="enhanced-player">
                            <div class="radio-player">
                                <audio preload="auto" controls muted></audio>
                            </div>
                            <div class="div-row">
                                <button onclick="start_radio()">Start!</button>
                                <button onclick="sync_radio()">Sync!</button>
                            </div>
                        </div>
                    </div>
                    <div class="previously-played">
                    </div>
                </div>
                <div class="more-details">
                    <details>
                        <summary>Progress details</summary>
                        <div>
                            <p>Download progress:</p>
                            <progress class="dl-progress" max="100"></progress>
                        </div>
                        <div>
                            <p>Live progress:</p>
                            <progress class="play-progress"></progress>
                        </div>
                        <div class="div-inline">
                            <div class="div-inline">
                                <p>Listening at:</p>
                                <p class="listening-at"></p>
                            </div>
                            <div class="div-inline">
                                <p>Show playback: </p>
                                <div class="no-break">
                                    <p class="relative-time"></p>
                                    <p>/</p>
                                    <p class="show-duration"></p>
                                </div>
                            </div>
                        </div>
                    </details>
                    <details>
                        <summary>Sync info</summary>
                        <div class="groups">
                            <table>
                                <tr>
                                    <th>Time of visit (ms)</th>
                                    <td class="time-of-visit"></td>
                                </tr>
                                <tr>
                                    <th>Time elapsed since visited (s)</th>
                                    <td class="you-are-here"></td>
                                </tr>
                                <tr>
                                    <th>List started on (ms)</th>
                                    <td class="started-on"></td>
                                </tr>
                                <tr>
                                    <th>List duration (s)</th>
                                    <td class="list-duration"></td>
                                </tr>
                            </table>
                            <h3>Calculations</h3>
                            <table>
                                <tr>
                                    <th>Times Fully Played</th>
                                    <td class="min-played"></td>
                                </tr>
                                <tr>
                                    <th>Times Played</th>
                                    <td class="max-played"></td>
                                </tr>
                                <tr>
                                    <th>Dt = TP - TFP</th>
                                    <td class="d-t"></td>
                                </tr>
                                <tr>
                                    <th>Delta time</th>
                                    <td class="delta-time"></td>
                                </tr>
                                <tr>
                                    <th>Initial "tune in" time (s)</th>
                                    <td class="current-time"></td>
                                </tr>
                            </table>
                        </div>
                    </details>
                    <details >
                        <summary>Info to get you started</summary>
                        <h2>Notice</h2>
                        <p>
                            If you are visiting for the first time, you might need to
                            "Allow Audio" first. Please do and refresh the page.
                        </p>
                        <h2>About</h2>
                        <p>
                            This is a "Radio Station Emulator". We create lists with
                            shows to be played, but since we are not doing streaming of
                            the playlists, we offer another way of "tuning in".
                        </p>
                        <p>
                            Providing the time a list started playing and having
                            pre-calculated the starting timestamps of each show relevant
                            to the list start timestamp, we can calculate which show is
                            on and what its current time of playing is.
                        </p>
                        <p>
                            Ultimately, you are hearing what we would be streaming, as
                            you would do for a regular radio station.
                        </p>
                        <h2>Steps</h2>
                        <ol>
                            <li>
                                First, your browser is going to ask our server here,
                                what is the current list that plays right now. It will
                                get a response and will fetch that list.
                            </li>
                            <li>
                                Based on properties of the list overall and the time of
                                visit, your browser will start comparing each show's
                                properties found in the list, to figure the relative
                                time of yours on the list. A progress bar labeled "Live
                                progress" will be indicating the correct time on the
                                show.
                            </li>
                            <li>
                                Having figured out the show that is playing, it will go
                                and download the whole show. Progress of that would be
                                observable via the "Download progress" bar below.
                            </li>
                            <li>
                                Upon completion of the download, the "Sync" button is
                                auto pressed and the player start playing the show from
                                the calculated second it calculated previously.
                            </li>
                        </ol>
                        <h2>Notes</h2>
                        <ul>
                            <li>
                                Sometimes, you might need to press the "Sync" button
                                more than once. That's mostly due to bandwidth
                                capabilities of both the server and the client. The
                                "tune" would be right if you press it multiple times and
                                land near the same timespace over and over.
                            </li>
                            <li>
                                Ideally, if "Listening at:" and "Show playback:" have
                                the same value then you are in sync!
                            </li>
                        </ul>
                    </details>
                    <details>
                        <summary>Data segments</summary>
                        <h3>Hash of list</h3>
                        <pre class="list-hash"></pre>
                        <h3>List info (JSON)</h3>
                        <pre class="list-info"></pre>
                        <h3>Hash of current show</h3>
                        <pre class="current-show-hash"></pre>
                        <h3>Show info (JSON)</h3>
                        <pre class="show-info"></pre>
                        <div>
                            <a href="./data.html" target="_blank">Data</a>
                        </div>
                    </details>
                </div>
            </div>
        </div>
        <script src="./js/image_generator.js"></script>
        <script src="./js/radio_emulator.js"></script>
    </body>
</html>