<?php

$secure = !empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] == 'on';
$port   = ($secure && $_SERVER['SERVER_PORT'] == 443) || $_SERVER['SERVER_PORT'] == 80 ? '' : ":" . $_SERVER['SERVER_PORT'];
$self = 'http' .
        ($secure ? 's' : '') .
        '://' . 
        $_SERVER['SERVER_NAME'] .
        $port . 
        preg_replace('/^(.*)\?.*$/', '$1', $_SERVER['REQUEST_URI']);

$flexgetCmd = 'sudo -u transmission -H /var/transmission/flexget-dev/bin/flexget';

$messages = array();
$errors = array();

$currentSeries = array();

if (isset($_POST['action'])) {
    $action = $_POST['action'];

    switch ($action) {
        case 'inject':
            if (!isset($_POST['inject'])) {
                $errors[] = 'No inject parameter specified';
                break;
            }

            $injectTitle = escapeshellarg($_POST['inject']);
            $injectUrl   = escapeshellarg($_POST['injecturl']);
            $runCmd      = '';

            # if there's an url, have it downloaded, else just learn the title
            if (preg_match("#https?://.*#", $injectUrl)) {
                $runCmd = "{$flexgetCmd} --inject {$injectTitle} {$injectUrl} ACCEPT";
            } else {
                $runCmd = "{$flexgetCmd} --inject {$injectTitle} --learn";
            }

            $output = '';
            $returnValue = 0;
            exec($runCmd, $output, $returnValue);
            
            if ($returnValue) {
                $error = urlencode('Failed to inject ' . $_POST['inject'] . "\n" . join("\n", $output));
                header("Location: {$self}?error={$error}");
                exit(0);
            } else {
                # Redirect and display a success message
                $message = urlencode('Successfully injected ' . $_POST['inject']);
                header("Location: {$self}?message={$message}");
                exit(0);
            }
            break;
            
        case 'series-forget':
            if (!isset($_POST['series'])) {
                $errors[] = 'No series parameter specified';
                break;
            }
            if (!isset($_POST['episode'])) {
                $errors[] = 'No episode parameter specified';
                break;
            } else {
                if (!$_POST['episode']) {
                    $errors[] = 'No episode number specified';
                    break;
                }
            }

            $forgetSeriesArg = escapeshellarg($_POST['series']);
            $forgetEpisodeArg = escapeshellarg($_POST['episode']);

            # The database may have multiple entries, so keep removing until it no longer matches anything
            do {
                $runCmd = "{$flexgetCmd} --series-forget $forgetSeriesArg $forgetEpisodeArg";
    
                $output = '';
                $returnValue = 0;
                exec($runCmd, $output, $returnValue);
            } while (preg_match("/^Removed/", $output[0]));

            if ($returnValue) {
                $error = urlencode('Failed to forget about ' . $_POST['series'] . ' ' . $_POST['episode'] . "\n" . join("\n", $output));
                header("Location: {$self}?error={$error}");
                exit(0);
            } else {
                $message = urlencode('Successfully forgot about ' . $_POST['series'] . ' ' . $_POST['episode']);
                header("Location: {$self}?message={$message}");
                exit(0);
            }
            break;

        default: 
            $error = urlencode('Unsupported action: ' . $_POST['action']);
            header("Location: {$self}?error={$error}");
            exit(0);
    }
} else {
    if (isset($_GET['message'])) {
        $messages[] = $_GET['message'];
    }
    if (isset($_GET['error'])) {
        $errors[] = $_GET['error'];
    }
}

# Grab the up-to-date list of tv series for display
$runCmd = "{$flexgetCmd} --series";

$output = '';
$returnValue = 0;
exec($runCmd, $output, $returnValue);

if (!$returnValue) {
    // Ignore the first and last two lines from the output
    assert('count($output) >= 4; // Expecting at least four lines of output from flexget');
    $output = array_slice($output, 2, -2);

    /*
          Name                          Latest              Status               
         -------------------------------------------------------------------------------
          castle                        s02e10              *hdtv-Proper         
     */
    foreach ($output as $line) {
        $matches = array();
        if (!preg_match('/^\s(?P<series>.{1,30})\s+(?P<episode>.{1,20})\s+(?P<quality>.*)\s+/', $line, $matches)) {
            $errors[] = "Failed to parse '$line'";
            continue;
        }

        $currentSeries[trim($matches['series'])] = array(
            'episode' => trim($matches['episode']),
            'quality' => trim($matches['quality']),
        );
    }
    ksort($currentSeries);
} else {
    $errors[] = 'Unable to get the current series/episode list. (Maybe flexget is currently running?)';
}

?><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
    <head>
        <title>Sihnon bittorrent utilities</title>
        <script lang="javascript">
function addEvent(obj, eventname, func, name) {
    if (obj.attachEvent) {
        //IE
        obj.attachEvent('on'+eventname, func);
    } else {
        //Non-IE (Firefox, Netscape, W3C standard)
        obj.addEventListener(eventname, func, false);
    }
}

addEvent(window, 'load', function() {
    addSimpleFormEvents([id('inject')]);
    addSimpleFormEvents([id('forgetSeries'), id('forgetEpisode')]);
});

function addSimpleFormEvents(inputFields) {
    for (var i = 0; i < inputFields.length; ++i) {
        var field = inputFields[i];

        addEvent(field, 'focus', function() {
            if (this.value == field.defaultValue) {
                this.value = "";
                removeClass(this, "default");
            }
        });

        addEvent(field, 'blur', function() {
            if (this.value == "") {
                this.value = this.defaultValue;
                addClass(this, "default");
            }
        });
    }
}

function id(elementId) {
    return document.getElementById(elementId);
}

function addClass(element, newclass) {
    //Return it immediately if it already exists
    if (element.className.indexOf(newclass) > -1)
        return;

    //Split it into an array, separated by spaces
    var classes = element.className.split(' ');

    //Add the new class
    classes.push(newclass);

    //Then return the array joined back into a string with spaces
    element.className = classes.join(' ');
}

function removeClass(element, oldclass) {
    //Split the class list into an array by spaces
    var classes = element.className.split(' ');
    for (var cls in classes) {
        //Iterate through the array of classes...
        if (classes[cls] == oldclass) {
            //...removing that class if it exists
            classes[cls] = undefined;
        }
    }
    //Then join the array back together and return.
    //We remove double-spaces as "delete" doesn't seem to delete the element entirely
    element.className = classes.join(' ').replace('  ',' ');
}

function seriesForget(series, episode) {
    id("listAction").value = "series-forget";
    id("listForgetSeries").value = series;
    id("listForgetEpisode").value = episode;

    id("listOperations").submit();
}
        </script>
        <style>
body {
    font-family: verdana, helvetica, sans-serif;
}

a {
    color: gray;
}

label {
    margin-left: 1em;
    margin-right: 1em;
}

#errors {
    border: 1px solid firebrick;
    background: peachpuff;
    color: darkred;
    margin: 1em;
}

#messages {
    border: 1px solid cornflowerblue;
    background: lightcyan;
    color: darkblue;
    margin: 1em;
}

.default {
    background: beige;
    color: darkgray;
    font-style: italic;
}

.icon {
    height: 16px;
    width: 16px;
}
        </style>
    </head>
    <body>
        <h1>Sihnon bittorrent utilities</h1>

        <?php if ($errors) { ?>
            <div id="errors">
                <ul>
                    <?php foreach ($errors as $error) { ?>
                        <li><?php echo htmlspecialchars($error); ?></li>
                    <?php } ?>
                </ul>
            </div>
        <?php } ?>
        <?php if ($messages) { ?>
            <div id="messages">
                <ul>
                    <?php foreach ($messages as $message) { ?>
                        <li><?php echo htmlspecialchars($message); ?></li>
                    <?php } ?>
                </ul>
            </div>
        <?php } ?>

        <h2>Inject a seen episode title into the flexget seen list</h2>
        <form action="<?=$self?>" method="post">
            <fieldset>
                <legend>Inject an entry into the list of seen TV episodes, and optionally download it</legend>

                <p>If an URL is provided, the episode will be injected into the list of seen episodes, and also downloaded immediately. If the URL is left blank, the episode will be learned only.</p>

                <input type="hidden" name="action" value="inject" />
                <label for="inject">Title:</label><input type="text" id="inject" name="inject" value="some.show.s01e01.quality" class="default" />
                <label for="injecturl">Url:</label><input type="text" id="injecturl" name="injecturl" value="http://" class="default" />
                <input type="submit" id="injectSubmit" name="submit" value="Send" />
            </fieldset>
        </form>

        <h2>Forget about an already seen episode</h2>
        <form action="<?=$self?>" method="post">
            <fieldset>
                <legend>Forget about an already seen episode</legend>
                <input type="hidden" name="action" value="series-forget" />
                <label for="forgetSeries">Series:</label><input type="text" id="forgetSeries" name="series" value="some show" class="default" />
                <label for="forgetEpisode">Episode:</label><input type="text" id="forgetEpisode" name="episode" value="s01e01" class="default" />
                <input type="submit" id="forgetSubmit" name="submit" value="Send" />
            </fieldset>
        </form>

        <h2>Currently known series/episodes</h2>
        <form action="<?$self?>" method="post" id="listOperations">
            <fieldset>
                <legend></legend>
                <input type="hidden" id="listAction" name="action" value="" />
                <input type="hidden" id="listForgetSeries" name="series" value="" />
                <input type="hidden" id="listForgetEpisode" name="episode" value="" />

                <table id="seriesList">
                    <thead>
                        <tr>
                            <th>Series Name</th>
                            <th>Current episode</th>
                            <th>Qualities seen</th>
                            <th>Operations</th>
                        </tr>
                    </thead>
                    <?php foreach ($currentSeries as $series => $details) {?>
                        <tr>
                            <td><?=htmlspecialchars($series)?></td>
                            <td><?=htmlspecialchars($details['episode'])?></td>
                            <td><?=htmlspecialchars($details['quality'])?></td>
                            <td><a title="Forget" onclick="seriesForget('<?=htmlspecialchars($series)?>','<?=htmlspecialchars($details['episode'])?>')"><img class="icon" src="bin.png" /></td>
                        </tr>
                    <?php } ?>
                </table>
            </fieldset>

    </body>
</html>