/wp-content/plugins/youtube-embed/includes/generate-embed-code.php

<?php

/**

* Generate embed code

*

* Functions calls to generate the required YouTube code

*

* @package	YouTubeEmbed

*/



/**

* Generate embed code

*

* Generate XHTML compatible YouTube embed code

*

* @since	2.0

*

* @uses		ye_convert_id			Convert special characters in ID

* @uses		ye_error				Display an error

* @uses		ye_extract_id			Get the video ID

* @uses		ye_validate_list		Get the requested listr

* @uses		ye_validate_id			Validate the video ID

* @uses		ye_validate_profile		Get the requested profile

* @uses		ye_set_general_defaults	Get general options

* @uses		ye_set_profile_defaults	Set default profile options

*

* @param	string		$id				Video ID

* @param	string		$type			Embed type

* @param	string		$width			Video width

* @param	string		$height			Video height

* @param	string		$fullscreen		Fullscreen button

* @param	string		$related		Show related info.

* @param	string		$autoplay		Start video automatically

* @param	string		$loop			Loop video to start

* @param	string		$start			Start in seconds

* @param	string		$info			Show video info.

* @param	string		$annotation		Annotations

* @param	string		$cc				Closed captions

* @param	string		$style			Stylesheet information

* @param	string		$link			Link back to YouTube

* @param	string		$react			Show EmbedPlus reactions

* @param	string		$stop			Stop in seconds

* @param	string		$sweetspot		Show EmbedPlus sweetspots

* @param	string		$disablekb		Disable keyboard controls

* @param	string		$ratio			Video size ratio

* @param	string		$autohide		Autohide controls

* @param	string		$controls		Display controls

* @param	string		$profile		Which profile to use

* @param	string		$list_style		How to use a list, if used

* @param	string		$audio			Only show controls, for audio playback

* @param	string		$template		Display template

* @param	string		$hd				Use HD, if available

* @param	string		$color		 	Progress bar colour

* @param	string		$theme			Use dark or light theme

* @param	string		$https			Use HTTPS for links

* @return	string						Code output

*/



function ye_generate_youtube_code( $id = '', $type = '', $width = '', $height = '', $fullscreen = '', $related = '', $autoplay = '', $loop = '', $start = '', $info = '', $annotation = '', $cc = '', $style = '', $link = '', $react = '', $stop = '', $sweetspot = '', $disablekb = '', $ratio = '', $autohide = '', $controls = '', $profile = '', $list_style = '', $audio = '', $template = '', $hd = '', $color = '', $theme = '', $https = '' )  {



	// Ensure an ID is passed

	if ( $id == '' ) { return ye_error( 'No video/playlist ID has been supplied' ); }



	// Get general options

	$general = ye_set_general_defaults();



	// Find the profile, if one is specified

	$profile = ye_validate_profile( $profile, $general[ 'profile_no' ] );



	// Get default values if no values are supplied

	$options = ye_set_profile_defaults( $profile );



	// Check it's not a list

	$playlist_ids = '';

	$list = ye_validate_list( $id, $general[ 'list_no' ] );

	if ( !is_array( $list ) ) {



		// Check if certain parameters are included in the URL

		$width = ye_get_url_para( $id, 'w', $width );

		$height = ye_get_url_para( $id, 'h', $height );



		// Extract the ID if a full URL has been specified

		$id = ye_extract_id( $id );



		// Is it being previewed? In which case remove any cache

		if ( ( preg_match( '/p=([0-9]*)&preview=true/', $_SERVER['QUERY_STRING'] ) == 1 ) && ( $general[ 'preview' ] == 1 ) ) {

			delete_transient( 'ye_type_' . $id );

			delete_transient( 'ye_title_' . $id );

		}



		// Check what type of video it is and whether it's valid

		$return = ye_validate_id( $id, true );

		$title = $return['title'];

		$embed_type = $return[ 'type' ];



		// If the video is invalid, output an appropriate error

		if ( ( $embed_type == '' ) or ( strlen ( $embed_type ) != 1 ) ) {

			if ( $embed_type == '' ) {

				$error = 'The YouTube ID of ' . $id . ' is invalid.';

			} else {

				$error = $embed_type;

			}

			$result = "\n<!-- YouTube Embed v" . youtube_embed_version . " | http://www.artiss.co.uk/artiss-youtube-embed -->\n";

			$result .= "<!-- " . $error . " -->\n" . ye_decode( $general[ 'error_message' ] ) . "\n<!-- End of YouTube Embed code -->\n";

			return $result;

		}



	} else {



		$embed_type = 'v';



		// Randomize the video

		if ( $list_style == 'random' ) { shuffle( $list ); }



		// Extract one video randomly

		if ( $list_style == 'single' ) {

			$id = $list[ array_rand( $list, 1 ) ];



		// Build the playlist

		} else {



			$id = $list [ 0 ];

			$title = '';

			// Build the playlist

			if ( count( $list ) > 1 ) {

				$loop = 1;

				while ( $loop < count( $list ) ) {

					if ( $playlist_ids != '' ) { $playlist_ids .= ','; }

					$list_id = ye_extract_id( $list[ $loop ] );

					$playlist_ids .= $list_id;

					$loop ++;

				}

			}

		}

	}



	// Generate a cache key for the above passed parameters

	$cache_key = 'ye_video_' . base64_encode( sha1( $id . $type . $width . $height . $fullscreen . $related . $autoplay . $loop . $start . $info . $annotation . $cc . $style . $link . $react . $stop . $sweetspot . $disablekb . $ratio . $autohide . $controls . $profile . $list_style . $audio . $template . $hd . $color . $theme . $https . print_r( $general, true ) . print_r( $options, true ) . print_r( $list, true ) ) );



	// Try and get the output from cache. If it exists, return the code

	if ( ( $general[ 'embed_cache' ] != 0 ) && ( !is_feed() ) ) {

		$result = get_transient( $cache_key );

		if ( $result !== false) { return $result; }

	}



	$metadata = $general[ 'metadata' ];



	// Work out correct protocol to use - HTTP or HTTPS

	if ( $https == '' ) { $https = $options[ 'https' ]; }

	if ( $https == 1 ) { $https = 's'; } else { $https = ''; }



	// If this is a feed then display a thumbnail and/or text link to the original video

	if ( is_feed () ) {

		$result = '';

		if ( $playlist_ids != '' ) {

			$result .= '<p>'.__('A video list cannot be viewed within this feed - please view the original content').".</p>\n";

		} else {

			$youtube_url = 'http' . $https . '://www.youtube.com/watch?' . $embed_type . '=' . $id;

			if ( ( $embed_type == 'v' ) && ( $general[ 'feed' ] != 't' ) ) { $result .= '<p><a href="' . $youtube_url . '"><img src="http://img.youtube.com/vi/' . $id . '/' . $general[ 'thumbnail' ] . ".jpg\"></a></p>\n"; }

			if ( ( $general ['feed'] != 'v' ) or ( $embed_type != 'v' ) ) { $result .= '<p><a href="' . $youtube_url . '">' . __( 'Click here</a> to view the video on YouTube' ) . ".</p>\n"; }

		}

		return $result;

	}



	// Only set width and height from defaults if both are missing

	if ( ( $width == '' ) && ( $height == '' ) ) {

		$width = $options[ 'width' ];

		$height = $options[ 'height' ];

	}



	// If values have not been pressed, use the default values

	if ( $fullscreen == '' ) { $fullscreen = $options[ 'fullscreen' ]; }

	if ( $related == '' ) { $related = $options[ 'related' ]; }

	if ( $autoplay == '' ) { $autoplay = $options[ 'autoplay' ]; }

	if ( $loop == '' ) { $loop = $options[ 'loop' ]; }

	if ( $info == '' ) { $info = $options[ 'info' ]; }

	if ( $annotation == '' ) { $annotation = $options[ 'annotation' ]; }

	if ( $cc == '' ) { $cc = $options[ 'cc' ]; }

	if ( $link == '' ) { $link = $options[ 'link' ]; }

	if ( $react == '' ) { $react = $options[ 'react' ]; }

	if ( $sweetspot == '' ) { $sweetspot = $options[ 'sweetspot' ]; }

	if ( $disablekb == '' ) { $disablekb = $options[ 'disablekb' ]; }

	if ( $autohide == '' ) { $autohide = $options[ 'autohide' ]; }

	if ( $controls == '' ) { $controls = $options[ 'controls' ]; }

	if ( $audio == '' ) { $audio = $options[ 'audio' ]; }

	if ( $hd == '' ) { $hd = $options[ 'hd' ]; }

	if ( $style == '' ) { $style = $options[ 'style' ]; }

	if ( $color == '' ) { $color = $options[ 'color' ]; }

	if ( $theme == '' ) { $theme = $options[ 'theme' ]; }



	$wmode = $options[ 'wmode' ];

	$shadow = $options[ 'shadow' ];



	// Build the required template

	if ( $template == '' ) { $template = $options[ 'template' ]; } else { $template = ye_decode( $template ); }

	if ( strpos( $template, '%video%' ) === false ) { $template = '%video%'; }



	// If a multi-play list has been specified and EmbedPlus selected, use fallback embedding method instead

	if ( ( $playlist_ids != '' ) && ( $type == 'm' ) && ( $list_style != 'single' ) ) { $type = $options[ 'fallback' ]; }



	// If looping and no playlist has been generated, add the current ID

	// This is a workaround for the AS3 player which won't otherwise loop

	if ( ( $loop == 1 ) && ( $embed_type != 'p' ) && ( $playlist_ids == '' ) ) { $playlist_ids = $id; }



	// If no type was specified, depending on whether this is a video or playlist, set the specific default

	if ( $type == '' ) {

		if ( $embed_type == 'v' ) {

			$type = $options[ 'type' ];

		} else {

			$type = $options[ 'playlist' ];

		}

	}



	// Set parameters without default values

	if ( $start == '' ) { $start = '0'; }

	if ( $stop == '' ) { $stop = '0'; }



	// If height or width is missing, calculate missing parameter using ratio

	if ( ( ( $width == '' ) or ( $height == '' ) ) && ( ( $width != '' ) or ( $height != '' ) ) ) {

		$ratio_to_use = '';

		if ( $ratio != '' ) {

			// Extract the ratio from the provided string

			$pos = strpos( $ratio, ':', 0 );

			if ( $pos !== false ) {

				$ratio_l = substr( $ratio, 0, $pos );

				$ratio_r = substr( $ratio, $pos + 1 );

				if ( ( is_numeric( $ratio_l ) ) && ( is_numeric( $ratio_r ) ) ) { $ratio_to_use = $ratio_l / $ratio_r; }

			}

		}



		// If no, or invalid, ratio supplied, calculate from the default video dimensions

		if ( $ratio_to_use == '' ) { $ratio_to_use = $options[ 'width' ] / $options[ 'height' ]; }



		// Complete the missing width or height using the ratio

		if ( $width == '' ) { $width = round( $height * $ratio_to_use, 0); }

		if ( $height == '' ) { $height = round( $width / $ratio_to_use, 0); }

	}



	// If audio playback option is set, restrict the height to just show the player toolbar

	if ( $audio == '1' ) { $height = 27; }



	// Set up embed types

	$tab = '';

	$class = 'youtube-player';

	$paras = 'version=3&amp;modestbranding=1';



	$embedplus = false;

	$swf = false;

	$iframe = false;

    $chromeless = false;



	if ( $type != 'v' ) {

		if ( $type == 'm' ) {

			$embedplus = true;

			$tab = "\t";

			$embedheight = $height + 32;

			$class = 'cantembedplus';

			$fallback = $options[ 'fallback' ];

		} else {

            if ( $type == "c" ) {

                $chromeless = true;

            } else {

                $swf = true;

            }

		}

	} else {

        $iframe = true;

	}



	// Generate parameters to add to URL

	if ( $fullscreen == 1 ) { $paras .= '&amp;fs=1'; } else { $paras .= '&amp;fs=0'; }

	if ( $related != 1 ) { $paras .= '&amp;rel=0'; }

	if ( $autoplay == 1 ) { $paras .= '&amp;autoplay=1'; $paras_ep .= '&amp;autoplay=1'; }

	if ( $loop == 1 ) { $paras .= '&amp;loop=1'; }

	if ( $info == 1 ) { $paras .= '&amp;showinfo=1'; }

	if ( $annotation != 1 ) { $paras .= '&amp;iv_load_policy=3'; }

	if ( $cc == 1 ) { $paras .= '&amp;cc_load_policy=1'; }

	if ( $disablekb == 1 ) { $paras .= '&amp;disablekb=1'; }

	if ( $autohide != 2 ) { $paras .= '&amp;autohide=' . $autohide; }

	if ( $controls != 1 ) { $paras .= '&amp;controls=0'; }

	if ( strtolower( $color ) != 'red' ) { $paras .= '&amp;color=' . strtolower( $color ); }

	if ( strtolower( $theme ) != 'dark' ) { $paras .= '&amp;theme=' . strtolower( $theme ); }



	// If not a playlist, add the playlist parameter

	if ( $playlist_ids != '' ) { $paras .= '&amp;playlist=' . $playlist_ids; }



	// Generate EmbedPlus parameters

	$paras_ep = '&amp;width=' . $width . '&amp;height=' . $height;

	if ( $react != 1 ) { $paras_ep .= '&amp;react=0'; }

	if ( $sweetspot != 1 ) { $paras_ep .= '&amp;sweetspot=0'; }

	if ( $hd == 1 ) { $paras_ep .= '&amp;hd=1'; }



	// Add start & stop parameters

	if ( $start != 0 ) { $paras .= '&amp;start=' . $start; $paras_ep .= '&amp;start=' . $start; }

	if ( $stop != 0 ) { $paras_ep .= '&amp;stop=' . $stop; }



	$result = '';



	// Add EmbedPlus code

	if ( $embedplus ) {

		$result .= "<object type=\"application/x-shockwave-flash\" width=\"" . $width . "\" height=\"" . $embedheight . "\" data=\"http://getembedplus.com/embedplus.swf\" style=\"" . $style . "\" id=\"" . uniqid( 'ep_', true ) . "\">\n";

		$result .= "\t<param value=\"http://getembedplus.com/embedplus.swf\" name=\"movie\" />\n";

		$result .= "\t<param value=\"high\" name=\"quality\" />\n";

		$result .= "\t<param value=\"" . $wmode . "\" name=\"wmode\" />\n";

		$result .= "\t<param value=\"always\" name=\"allowscriptaccess\" />\n";

		if ( $fullscreen == 1 ) { $result .= "\t<param name=\"allowFullScreen\" value=\"true\" />\n"; }

		$result .= "\t<param name=\"flashvars\" value=\"ytid=" . $id . $paras_ep . "\" />\n";

	}



	// Add AS3 YouTube embed code

	if ( ( $swf ) or ( $chromeless ) or ( ( $embedplus ) && ( ( $fallback == 'o' ) or ( $fallback == 'p' ) ) ) ) {



        if ( $chromeless ) {

            $url_start = 'http' . $https . '://www.youtube.com/apiplayer?video_id=' . $id . '&';

        } else {

            $url_start = 'http' . $https . '://www.youtube.com/' . $embed_type . '/' . $id . '?';

        }



		$result .= $tab . "<object class=\"" . $class . "\" type=\"application/x-shockwave-flash\" data=\"" . $url_start . $paras . "\" width=\"" . $width . "\" height=\"" . $height . "\" style=\"" . $style . "\"";



		if ( $metadata != 0 ) { $result .= " rel=\"media:video\" resource=\"http" . $https . "://www.youtube.com/" . $embed_type . "/" . $id ."\" xmlns:media=\"http://search.yahoo.com/searchmonkey/media/\""; }

		$result .= ">\n";

		if ( $metadata != 0 ) { $result .= $tab . "\t<a rel=\"media:thumbnail\" href=\"http://img.youtube.com/vi/" . $id . "/default.jpg\" />\n"; }

		$result .= $tab . "\t<param name=\"movie\" value=\"http" . $https . "://www.youtube.com/" . $embed_type . "/" . $id . "?" . $paras . "\" />\n";

		$result .= $tab . "\t<param name=\"wmode\" value=\"" . $wmode . "\" />\n";

		if ( $fullscreen == 1 ) { $result .= $tab . "\t<param name=\"allowFullScreen\" value=\"true\" />\n"; }

		if ( ( $link != 1 ) && ( $link != '' ) ) { $result .= $tab . "\t<param name=\"allowNetworking\" value=\"internal\" />\n"; }

		if ( ( $metadata != 0 ) && ( $title != '' ) ) { $result .= $tab . "\t<span property=\"media:title\" content=\"" . htmlentities( $title ) . "\" />\n"; }

		$result .= $tab . "</object>\n";

	}



	// Add IFRAME embed code

	if ( ( $iframe ) or ( ( $embedplus ) && ( $fallback == "v" ) ) ) {

		if ( $embed_type == "p" ) { $playlist_para = "p/"; } else { $playlist_para = ''; }

		$result .= $tab . '<iframe style="border: 0;' . $style . '" class="' . $class . '" width="' . $width . '" height="' . $height . '" src="http' . $https . '://www.youtube.com/embed/' . $playlist_para . $id . '?' . $paras . '&amp;wmode=' . $wmode . '"';

		if ( $fullscreen == 1 ) { $result .= ' allowfullscreen="allowfullscreen"'; }

		$result .= "></iframe>\n";

	}



	// If using EmbedPlus, add the OBJECT closure tag

	if ( $embedplus ) { $result .= "</object>\n<!--[if lte IE 6]> <style type=\"text/css\">.cantembedplus{display:none;}</style><![endif]-->\n"; }



	// Add drop shadow

	if ( ( is_numeric( $shadow ) ) && ( $shadow != 0 ) ) { $result .= "<br/><img src=\"" . plugins_url() . "/youtube-embed/images/shadow.png\" alt=\"\" title=\"\" height=\"" . $shadow . "\" width=\"" . $width . "\" />\n"; }



	// Now apply the template to the result

	$result = str_replace( '%video%', $result, $template );



	// Now add a commented header and trailer

	$result = "\n<!-- YouTube Embed v" . youtube_embed_version . " | http://www.artiss.co.uk/artiss-youtube-embed -->\n" . $result;

	$result .= "<!-- End of YouTube Embed code -->\n";



	// Cache the output

	if ( $general[ 'embed_cache' ] != 0 ) { set_transient( $cache_key, $result, 3600 * $general[ 'embed_cache' ] );	}



	return $result;

}



/**

* Validate a supplied profile name

*

* Returns a profile number for a supplied name

*

* @since	2.0

*

* @param	string		$name		The name of the profile to find

* @param	string		$number		The number of profiles available

* @return	string					The profile number (defaults to 0)

*/



function ye_validate_profile( $name, $number ) {



	$profile = 0;

	$name = strtolower( $name );



	if ( ( $name != '' ) && ( $name != 'default' ) ) {



		// Loop around, fetching in profile names

		$loop = 1;

		while ( ( $loop <= $number ) && ( $profile == 0 ) ) {

			if ( ( $name == $loop ) or ( $name == 'Profile ' . $loop ) ) {

				$profile = $loop;

			} else {

				$profiles = get_option( 'youtube_embed_profile' . $loop );

				$profname = strtolower( $profiles[ 'name' ] );

				if ( $profname == $name ) { $profile = $loop; }

			}

			$loop ++;

		}

	}

	return $profile;

}



/**

* Validate a supplied list name

*

* Returns a list for a supplied list number or name name - blank if not a valid list

*

* @since	2.0

*

* @param	string		$name		The name of the list to find

* @param	string		$number		The number of lists available

* @return	string					The list (defaults to blank)

*/



function ye_validate_list( $name, $number ) {



	$list = '';



	// If the parameter contains commas, assume to be a comma seperated list and move into an array

	if ( strpos( $name, ',' ) !== false ) {

		$list = explode( ',', $name );

	} else {



		// No comma, so check if this is a named list

		$name = strtolower( $name );



		if ( $name != '' ) {



			// Loop around, fetching in profile names

			$loop = 1;

			while ( ( $loop <= $number ) && ( $list == '' ) ) {

				$listfiles = get_option( 'youtube_embed_list' . $loop );

				if ( ( $name == strval( $loop ) ) or ( $name == 'List ' . $loop ) ) {

					$list = $listfiles[ 'list' ];

				} else {

					$listname = strtolower( $listfiles[ 'name' ] );

					if ( $listname == $name ) { $list = $listfiles[ 'list' ]; }

				}

				$loop ++;

			}

		}

		if ( $list != '' ) { $list = explode( "\n", $list ); }

	}

	return $list;

}



/**

* Get URL parameters

*

* Extract a requested parameter from a URL

*

* @since	2.0

*

* @param	string		$id			The ID of the video

* @param	string		$para		The parameter to extract

* @param	string		$current	The current parameter value

* @return	string					The parameter value

*/



function ye_get_url_para( $id, $para, $current ) {



	// Look for an ampersand

	$start_pos = false;

	if ( strpos( $id, '&amp;' . $para . '=' ) !== false ) {	$start_pos = strpos( $id, '&amp;' . $para . '=' ) + 6 + strlen( $para ); }



	// If a parameter was found, look for the end of it

	if ( $start_pos !== false ) {

		$end_pos = strpos( $id, '&amp;', $start_pos + 1 );

		if ( !$end_pos ) { $end_pos = strlen( $id ); }



		// Extract the parameter and return it

		$current = substr( $id, $start_pos, $end_pos - $start_pos );

	}



	return $current;

}



/**

* Decode a string

*

* Decode an HTML encoded string. I'm not using htmlspecialchars_decode to maintain

* PHP 4 compatibility.

*

* @since	2.0.3

*

* @param	string		$encoded	The encoded string

* @return	string					The decoded string

*/



function ye_decode( $encoded ) {



	$find = array( '&amp;', '&quot;', '&#039;', '&lt;', '&gt;' );

	$replace = array( '&', '"', "'", '<', '>' );



	$decoded = str_replace($find,$replace,$encoded);



	return $decoded;

}

?>