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[0] in function chmod in /var/www/hopeinstoughton_www/wp-content/plugins/simple-universal-google-analytics/main.php on line 8
[1] in function include_once in /var/www/hopeinstoughton_www/wp-settings.php on line 560
[2] in function require_once in /var/www/hopeinstoughton_www/wp-config.php on line 85
[3] in function require_once in /var/www/hopeinstoughton_www/wp-load.php on line 50
[4] in function require_once in /var/www/hopeinstoughton_www/wp-blog-header.php on line 13
[5] in function require in /var/www/hopeinstoughton_www/index.php on line 17

<?php

/*
Plugin Name: YouTube Playlists
Plugin URI: http://hostz.org/
Description: Manage Youtube Playlists
Version: 1.0.0
Author: Phil Young
Author URI: http://hostz.org/
License: Whatever
*/

/*
	For service account, need to go to admin.google.com and log in as admin...
	main menu -> Security => Access and data controls => API controls
			(down bottom) -> Domain wide delegation -> Manage -> ... -> OAuth Scopes

	log in to youtube = create playlists - add/remove/rebuild items
	maybe:  create entry for streaming video
*/

use \Google\Client;
use \Google\Service\YouTube;
use \Google\Service\YouTube\PlaylistSnippet;
use \Google\Service\YouTube\PlaylistStatus;
use \Google\Service\YouTube\PlaylistItem;
use \Google\Service\YouTube\PlaylistItemSnippet;
use \Google\Service\YouTube\Playlist;

class youtube_playlist_class {

	const CHANNEL = 'UCIi20hlVjzrt04G3YPNRTgw';
    const OPTIONGROUP = 'login-options';
	private $valid;
	private	$old_playlist;
	private $event_id;

	public function __construct() {
		@session_start();
		$this->valid = $_SESSION['playlist_valid'] ?? 0;

		$this->URL = plugin_dir_url(__FILE__);
		add_action( 'wp_loaded', [$this, 'custom_urls'], 5 );                    // custom urls
		if ($this->valid) {
			add_action( 'event_save_before', [$this, '__eventsave'] );
			add_action( 'event_save_after', [$this, '__eventaftersave'] );
		}
		add_action( 'event_fields', [$this, '__eventfields'] , 50, 2);
	}

	public function fetchAccessToken() {
		$client = $this->getGoogleClient();
		$access_token = $client->fetchAccessTokenWithAssertion();
		return $access_token;
	}
	
	protected function getGoogleClient() {
		$client = new \Google\Client();
		$client->setAuthConfig(__DIR__ . '/bulk-email-445521-a159a94e7089.json');
		$client->useApplicationDefaultCredentials();
		$client->addScope(YouTube::YOUTUBE);
		$client->setApplicationName('youtube3');			// change app name whenever scope permissions change for Domain-wide Delegation
		return $client;
	}

    public function custom_urls() {
		$cache = $_SERVER['REQUEST_URI'];
        if (($p = strpos($cache, '?')) !== FALSE) {
            $cache = substr($cache, 0, $p);
        }
        $admin = current_user_can('editor') || current_user_can('administrator');
		$isYouTube = (int) ($_GET['youtube'] ?? '0');
		if ($isYouTube) {
			setCookie('youtube', 1, 0, '/');				// for this session, assume login is for youtube as well
			$_COOKIE['youtube'] = 1;
		}
		if ($admin) {
			if (preg_match('#/~/test/(\d+)$#', $cache, $matches)) {
				$this->CreatePlaylist((int)($matches[1] ?? '0'));
				exit;
			} elseif (preg_match('#/~/test$#', $cache, $matches)) {
				header('Content-type: text/plain');
				$this->Test();
				exit;
			}
		}
	}

	public function Test() {
		$client = $this->getGoogleClient();
		$youtube = new YouTube($client);
		
		// Set parameters for the request
		$queryParams = [
			'channelId' => static::CHANNEL, // Example: Google Developers Channel
			'maxResults' => 25
		];

		// Call the playlists.list method
		$response = $youtube->playlists->listPlaylists('snippet,contentDetails', $queryParams);

		foreach ($response['items'] as $playlist) {
			echo "Title: " . $playlist['snippet']['title'] . PHP_EOL;
			echo "Playlist ID: " . $playlist['id'] . PHP_EOL;
			echo "Item Count: " . $playlist['contentDetails']['itemCount'] . PHP_EOL . "---" . PHP_EOL;
		}		
	}

	protected function getGoogleClientAccess() {		// get handle to logged-in users youtube account
		$options = get_option(static::OPTIONGROUP, []);
		$token = $_SESSION['google_token'];

		$client = new \Google\Client([
			'client_id'	=> $options['au_client_id'],
		]);
		$client->setClientSecret($options['au_secret']);
		$client->addScope(YouTube::YOUTUBE);
		$client->setAccessToken($token);
		if ($client->isAccessTokenExpired()) {
			$client->fetchAccessTokenWithRefreshToken($client->getRefreshToken());
			// Store the updated token back to your database or session
			$token = $client->getAccessToken();
			$_SESSION['google_token'] = $token;
			unset($client);
			$client = new \Google\Client([
				'client_id'	=> $options['au_client_id'],
			]);
			$client->setClientSecret($options['au_secret']);
			$client->addScope(YouTube::YOUTUBE);
			$client->setAccessToken($token);
		}

		return $client;
	}
	
	public function CreatePlaylist($event_id) {
        global $wpdb;
		if (!$event_id) die("Event Id not specified");

		// load the event
		$did = "'" . esc_sql($event_id) . "'";
		$data = $wpdb->get_row("select me_id,me_topic,me_playlist,me_playlistid from mm_event where me_id=$did");
		$playlist = $data->me_playlistid ?? '';

		$client = $this->getGoogleClientAccess();
		$youtube = new YouTube($client);

		// this must be a real YouTube user, using OAuth2.  Cannot use a service account to create/update playlists
		// otherwise:       "message": "Unauthorized", "domain": "youtube.header", "reason": "youtubeSignupRequired",

		// do we have a playlist?  if not create it and update database
		if ($playlist == '') {

			// 2. Define the playlist metadata (Snippet)
			$playlistSnippet = new PlaylistSnippet();
			$playlistSnippet->setTitle($data->me_topic);
//			$playlistSnippet->setDescription('Visit us at https://hopeinstoughton.org/');

			// 3. Define the privacy status
			$playlistStatus = new PlaylistStatus();
			$playlistStatus->setPrivacyStatus('public');

			// 4. Combine into a Playlist object
			$youTubePlaylist = new Playlist();
			$youTubePlaylist->setSnippet($playlistSnippet);
			$youTubePlaylist->setStatus($playlistStatus);

			// 5. Execute the request
			try {
				$playlistResponse = $youtube->playlists->insert('snippet,status', $youTubePlaylist, []);
				$playlist = $playlistResponse['id'];
				$sql = 'update mm_event set me_playlistid=%s where me_id=%s';
				$wpdb->query(
					$wpdb->prepare($sql, $playlist, $event_id)
				);
			} catch (Google_Service_Exception $e) {
				echo "Service error: " . $e->getMessage();
				die('Error');
			}
			sleep(5);			// wait for the playlist to be created
		}

		// get the list of videos to be added to the playlist
		$sql = <<<BLOCK
select mixe_sequence, mi_title, mi_other, mi_date
	from mm_item_x_event 
		inner join mm_item on mixe_item=mi_id
where mixe_event=%d
order by mixe_sequence
BLOCK;
		$rows = $wpdb->get_results( $wpdb->prepare( $sql, $event_id) );
		$target = [];
		foreach($rows as $row) {
			$payload = json_decode($row->mi_other, TRUE);
			$current_link = $payload['youtube'] ?? '';
			$res = ParseVideoUrl($current_link);
			if ($res->source == 'youtube' && $res->id !== FALSE) {
				$target[] = [ 'id' => $res->id, 'title' => $row->mi_title ];
			}
			
		}

		// get the list of videos currently on the Playlist
		// changing names of titles has to be done manually
		
		$params = [
			'playlistId' => $playlist, 
			'maxResults' => 100
		];
		$current = [];
		// Call the playlistItems.list method
		try {
			$response = $youtube->playlistItems->listPlaylistItems('snippet,contentDetails', $params);
			foreach ($response['items'] as $item) {
				$current[] = [ 'id' => $item['contentDetails']['videoId'], 'title' => $item['snippet']['title'] ];
			}
		} finally {
		}

		$hasError = FALSE;
		foreach($target as $tindex => $item) {
			$found = FALSE;
			foreach($current as $cindex => $x) {
				if ($item['id'] == $x['id']) {
					$found = $cindex;
					break;
				}
			}
			if ($found !== FALSE) {			// already listed - no need to do anything
				unset($current[$found]);
			} else {						// need to add it to the playlist

				try {
					// 2. Define the resourceId (the video to add)
					$resourceId = new \Google\Service\YouTube\ResourceId();
					$resourceId->setVideoId($item['id']);
					$resourceId->setKind('youtube#video');

					// 3. Define the snippet (the playlist container)
					$playlistItemSnippet = new PlaylistItemSnippet();
					$playlistItemSnippet->setPlaylistId($playlist); 
					$playlistItemSnippet->setResourceId($resourceId);

					// 4. Create the PlaylistItem object
					$playlistItem = new PlaylistItem();
					$playlistItem->setSnippet($playlistItemSnippet);

					// 5. Execute the insert request
					// The "part" parameter defines which properties the API should return
					$response = $youtube->playlistItems->insert('snippet', $playlistItem);

				} catch (\Google\Service\Exception $e) {
					echo "{$item['id']} API error: " . $e->getMessage();
					$hasError = TRUE;
				} catch (Exception $e) {
					echo "General error: " . $e->getMessage();
					$hasError = TRUE;
				}
		
			}
		}
		if ($hasError) die('Error');

		// anything remaining in $current should be removed
	}
		
	public function __eventsave($payload) {
        global $wpdb;
		if ($payload->event_id) {
			// get the old event
			$did = "'" . esc_sql($payload->event_id) . "'";
            $data = $wpdb->get_row("select me_playlist from mm_event where me_id=$did");
            $this->old_playlist = (int) $data->me_playlist;
		} else {
			$this->old_playlist = 0;
		}
		$payload->types[] = '%d';
		$payload->values['me_playlist'] = empty($_POST['me_playlist']) ? 0 : 1;
	}
	
	public function __eventaftersave($payload) {
		// has the playlist changed?  And Have we logged in as youtube
//		if ($this->old_playlist != $payload->values['me_playlist']) {
			if ($payload->values['me_playlist']) {
				$this->CreatePlaylist($payload->event_id);
			}
//		}
		
	}

	function submit_button( $text = null, $type = 'primary', $name = 'submit', $wrap = true, $other_attributes = null ) {
        return get_submit_button( $text, $type, $name, $wrap, $other_attributes );
    }

	public function __eventfields($payload, $mediamanager) {
        global $wpdb;
		$data = $payload->data;
		if ($this->valid) {
			$text = $mediamanager->FormField($data, 'me_playlist', 'YouTube Playlist', [ 'checkbox' => TRUE  ] );		// ,'suffix' => '<a href="' . . '#">Log in to YouTube</a>'
			$sql = <<<BLOCK
select mixe_sequence, mi_id, mi_title, mi_other, mi_date
	from mm_item_x_event 
		inner join mm_item on mixe_item=mi_id
where mixe_event=%d
order by mixe_sequence
BLOCK;
			$rows = $wpdb->get_results( $wpdb->prepare( $sql, $data->me_id) );
			$topic = $data->me_topic;
			$html = '';
			foreach($rows as $row) {
				$title = trim($row->mi_title);
				if ($title != '') $title = " - {$title}";
				$html .= "ren {$row->mi_id}.mp4 \"[{$row->mixe_sequence}] $topic{$title}.mp4\"\r";
			}
			$html = str_replace("—", '-', $html);
/*			$text .= <<<BLOCK
</td></tr><tr><td></td><td>
<textarea name="unused" style="width:700px;height:150px">$html</textarea>
BLOCK;
//  */
			$payload->fields .= $text;
		} else {
			$text = '';
		}
	
//		$payload->buttons .= ' ' . $this->submit_button('YouTube Playlist', 'secondary', 'play', FALSE);
		
		if (($data->me_playlistid ?? '') != '') {
			$payload->buttons .= " <a href=\"https://www.youtube.com/playlist?list={$data->me_playlistid}\" target=\playlist\" rel=\"nofollow\" class=\"button\">YouTube Playlist</a>";
		}
	}

}

/*
			if ($_SERVER['REMOTE_ADDR'] == '173.48.93.56') 
*/

new youtube_playlist_class();