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"Added sample: php/playlist_localizations.php"
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@AndyDiamondstein
AndyDiamondstein committed Nov 19, 2015
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<?php

/**
* This sample sets and retrieves localized metadata for a playlist by:
*
* 1. Updating language of the default metadata and setting localized metadata
* for a playlist via "playlists.update" method.
* 2. Getting the localized metadata for a playlist in a selected language using the
* "playlists.list" method and setting the "hl" parameter.
* 3. Listing the localized metadata for a playlist using the "playlists.list" method
* and including "localizations" in the "part" parameter.
*
* @author Ibrahim Ulukaya
*/

$htmlBody = <<<END
<form method="GET">
<div>
Action:
<select id="action" name="action">
<option value="set">Set Localization - Fill in: playlist ID, default language, language, , title and description</option>
<option value="get">Get Localization- Fill in: playlist ID, language</option>
<option value="list">List Localizations - Fill in: playlist ID, language</option>
</select>
</div>
<br>
<div>
Playlist ID: <input type="text" id="playlistId" name="playlistId" placeholder="Enter Playlist ID">
</div>
<br>
<div>
Default Language: <input type="text" id="defaultLanguage" name="defaultLanguage" placeholder="Enter Default Language (BCP-47 language code)">
</div>
<br>
<div>
Language: <input type="text" id="language" name="language" placeholder="Enter Local Language (BCP-47 language code)">
</div>
<br>
<div>
Title: <input type="text" id="title" name="title" placeholder="Enter Title">
</div>
<br>
<div>
Description: <input type="text" id="description" name="description" placeholder="Enter Description">
</div>
<br>
<input type="submit" value="GO!">
</form>
END;

// Call set_include_path() as needed to point to your client library.
require_once 'Google/Client.php';
require_once 'Google/Service/YouTube.php';
session_start();


/*
* You can acquire an OAuth 2.0 client ID and client secret from the
* {{ Google Cloud Console }} <{{ https://cloud.google.com/console }}>
* For more information about using OAuth 2.0 to access Google APIs, please see:
* <https://developers.google.com/youtube/v3/guides/authentication>
* Please ensure that you have enabled the YouTube Data API for your project.
*/
$OAUTH2_CLIENT_ID = 'REPLACE_ME';
$OAUTH2_CLIENT_SECRET = 'REPLACE_ME';

$action = $_GET['action'];
$resource = $_GET['resource'];
$playlistId = $_GET['playlistId'];
$language = $_GET['language'];
$defaultLanguage = $_GET['defaultLanguage'];
$title = $_GET['title'];
$description = $_GET['description'];

$client = new Google_Client();
$client->setClientId($OAUTH2_CLIENT_ID);
$client->setClientSecret($OAUTH2_CLIENT_SECRET);

/*
* This OAuth 2.0 access scope allows for full read/write access to the
* authenticated user's account.
*/
$client->setScopes('https://www.googleapis.com/auth/youtube');
$redirect = filter_var('http://' . $_SERVER['HTTP_HOST'] . $_SERVER['PHP_SELF'],
FILTER_SANITIZE_URL);
$client->setRedirectUri($redirect);

// Define an object that will be used to make all API requests.
$youtube = new Google_Service_YouTube($client);

if (isset($_GET['code'])) {
if (strval($_SESSION['state']) !== strval($_GET['state'])) {
die('The session state did not match.');
}

$client->authenticate($_GET['code']);
$_SESSION['token'] = $client->getAccessToken();
header('Location: ' . $redirect);
}

if (isset($_SESSION['token'])) {
$client->setAccessToken($_SESSION['token']);
}

// Check to ensure that the access token was successfully acquired.
if ($client->getAccessToken()) {
// This code executes if the user enters an action in the form
// and submits the form. Otherwise, the page displays the form above.
if ($_GET['action']) {
try {
switch ($action) {
case 'set':
setPlaylistLocalization($youtube, $playlistId, $defaultLanguage,
$language, $title, $description, $htmlBody);
break;
case 'get':
getPlaylistLocalization($youtube, $playlistId, $language, $htmlBody);
break;
case 'list':
listPlaylistLocalizations($youtube, $playlistId, $htmlBody);
break;
}
} catch (Google_Service_Exception $e) {
$htmlBody .= sprintf('<p>A service error occurred: <code>%s</code></p>',
htmlspecialchars($e->getMessage()));
} catch (Google_Exception $e) {
$htmlBody .= sprintf('<p>An client error occurred: <code>%s</code></p>',
htmlspecialchars($e->getMessage()));
}
}
$_SESSION['token'] = $client->getAccessToken();
} else {
// If the user hasn't authorized the app, initiate the OAuth flow
$state = mt_rand();
$client->setState($state);
$_SESSION['state'] = $state;

$authUrl = $client->createAuthUrl();
$htmlBody = <<<END
<h3>Authorization Required</h3>
<p>You need to <a href="$authUrl">authorize access</a> before proceeding.<p>
END;
}


/**
* Updates a playlist's default language and sets its localized metadata.
*
* @param Google_Service_YouTube $youtube YouTube service object.
* @param string $playlistId The id parameter specifies the playlist ID for the resource
* that is being updated.
* @param string $defaultLanguage The language of the playlist's default metadata
* @param string $language The language of the localized metadata
* @param string $title The localized title to be set
* @param string $description The localized description to be set
* @param $htmlBody - html body.
*/
function setPlaylistLocalization(Google_Service_YouTube $youtube, $playlistId, $defaultLanguage,
$language, $title, $description, &$htmlBody) {
// Call the YouTube Data API's playlists.list method to retrieve playlists.
$playlists = $youtube->playlists->listPlaylists("snippet,localizations", array(
'id' => $playlistId
));

// If $playlists is empty, the specified playlist was not found.
if (empty($playlists)) {
$htmlBody .= sprintf('<h3>Can\'t find a playlist with playlist id: %s</h3>', $playlistId);
} else {
// Since the request specified a playlist ID, the response only
// contains one playlist resource.
$updatePlaylist = $playlists[0];

// Modify playlist's default language and localizations properties.
// Ensure that a value is set for the resource's snippet.defaultLanguage property.
$updatePlaylist['snippet']['defaultLanguage'] = $defaultLanguage;
$localizations = $updatePlaylist['localizations'];

if (is_null($localizations)) {
$localizations = array();
}
$localizations[$language] = array('title' => $title, 'description' => $description);
$updatePlaylist['localizations'] = $localizations;

// Call the YouTube Data API's playlists.update method to update an existing playlist.
$playlistUpdateResponse = $youtube->playlists->update("snippet,localizations", $updatePlaylist);

$htmlBody .= "<h2>Updated playlist</h2><ul>";
$htmlBody .= sprintf('<li>(%s) default language: %s</li>', $playlistId,
$playlistUpdateResponse['snippet']['defaultLanguage']);
$htmlBody .= sprintf('<li>title(%s): %s</li>', $language,
$playlistUpdateResponse['localizations'][$language]['title']);
$htmlBody .= sprintf('<li>description(%s): %s</li>', $language,
$playlistUpdateResponse['localizations'][$language]['description']);
$htmlBody .= '</ul>';
}
}

/**
* Returns localized metadata for a playlist in a selected language.
* If the localized text is not available in the requested language,
* this method will return text in the default language.
*
* @param Google_Service_YouTube $youtube YouTube service object.
* @param string $playlistId The videoId parameter instructs the API to return the
* localized metadata for the playlist specified by the playlist id.
* @param string language The language of the localized metadata.
* @param $htmlBody - html body.
*/
function getPlaylistLocalization(Google_Service_YouTube $youtube, $playlistId,
$language, &$htmlBody) {
// Call the YouTube Data API's playlists.list method to retrieve playlists.
$playlists = $youtube->playlists->listPlaylists("snippet", array(
'id' => $playlistId,
'hl' => $language
));

// If $playlists is empty, the specified playlist was not found.
if (empty($playlists)) {
$htmlBody .= sprintf('<h3>Can\'t find a playlist with playlist id: %s</h3>', $playlistId);
} else {
// Since the request specified a playlist ID, the response only
// contains one playlist resource.
$localized = $playlists[0]["snippet"]["localized"];

$htmlBody .= "<h3>Playlist</h3><ul>";
$htmlBody .= sprintf('<li>title(%s): %s</li>', $language, $localized['title']);
$htmlBody .= sprintf('<li>description(%s): %s</li>', $language, $localized['description']);
$htmlBody .= '</ul>';
}
}

/**
* Returns a list of localized metadata for a playlist.
*
* @param Google_Service_YouTube $youtube YouTube service object.
* @param string $playlistId The videoId parameter instructs the API to return the
* localized metadata for the playlist specified by the playlist id.
* @param $htmlBody - html body.
*/
function listPlaylistLocalizations(Google_Service_YouTube $youtube, $playlistId, &$htmlBody) {
// Call the YouTube Data API's playlists.list method to retrieve playlists.
$playlists = $youtube->playlists->listPlaylists("snippet", array(
'id' => $playlistId
));

// If $playlists is empty, the specified playlist was not found.
if (empty($playlists)) {
$htmlBody .= sprintf('<h3>Can\'t find a playlist with playlist id: %s</h3>', $playlistId);
} else {
// Since the request specified a playlist ID, the response only
// contains one playlist resource.
$localizations = $playlists[0]["localizations"];

$htmlBody .= "<h3>Playlist</h3><ul>";
foreach ($localizations as $language => $localization) {
$htmlBody .= sprintf('<li>title(%s): %s</li>', $language, $localization['title']);
$htmlBody .= sprintf('<li>description(%s): %s</li>', $language, $localization['description']);
}
$htmlBody .= '</ul>';
}
}
?>

<!doctype html>
<html>
<head>
<title>Set and retrieve localized metadata for a playlist</title>
</head>
<body>
<?=$htmlBody?>
</body>
</html>

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