<?php

/*
*	Sanitize theme options
*	Will convert the string to a database sage option string
*/

/*--------------------------------------------------------------------------------------------------
	Get option - This function will return the option
	@option : if specified, returns the option value , if not, returns the full list of category options
	@category : returns the saved options category
--------------------------------------------------------------------------------------------------*/
	global $saved_options;
	$saved_options = '';

	function zget_option( $option,$category = false , $all = false , $default = false ) {
		
		global $saved_options;
		
		if ( !ZN()->theme_data ) {
			return false;
		}

		if ( empty( $saved_options ) ) {
			$saved_options = get_option( ZN()->theme_data['options_prefix'] );
		}
		
		if ( $all ){
			return $saved_options;
		}
		
		if ( !empty($saved_options[$category][$option]) || ( isset($saved_options[$category][$option]) && $saved_options[$category][$option] === '0' ) ) {
			$return = $saved_options[$category][$option];
		}
		elseif( isset( $default ) ){
			$return = $default;
		}
		else {
			$return = false;
		}
		
		return $return;
	}


	function zn_uid( $prepend = 'eluid', $length = 8 ){
		return $prepend . substr(str_shuffle(MD5(microtime())), 0, $length);
	}	



function zn_get_col_size( $col )
{
	$cols = array
		(
			'1' => 'col-sm-12',
			'2' => 'col-sm-6',
			'3' => 'col-sm-4',
			'4' => 'col-sm-3',
			'5' => 'col-sm-4 col-sm-1-5',
		);

	return $cols[$col];
}

/*--------------------------------------------------------------------------------------------------
	Move to top - Moves an array key to the top position
	@array : The array that we need to change
	@key : The key that we need to move to first position
	return : the array with the keys changed
--------------------------------------------------------------------------------------------------*/
function zn_move_to_top(&$array, $key) {
    $temp = array($key => $array[$key]);
    unset($array[$key]);
    $array = $temp + $array;
}

/*--------------------------------------------------------------------------------------------------
	Move to end - Moves an array key to the top position
	@array : The array that we need to change
	@key : The key that we need to move to first position
	return : the array with the keys changed
--------------------------------------------------------------------------------------------------*/
function zn_move_to_end(&$array, $key) {
    $temp = array($key => $array[$key]);
    unset($array[$key]);
    $array =  $array + $temp;
}


add_action('zn_save_theme_options', 'zn_refresh_mailchimp_lists');
function zn_refresh_mailchimp_lists(){
	delete_option( 'zn_mailchimp_lists' );
}

/* RETURNS A LIST OF MAILCHIMP CREATED LISTS */
	function generate_mailchimp_lists( $option_id = 'mailchimp_api' , $option_page = 'advanced' ,$refresh = false ){

	//	delete_option('zn_mailchimp_lists');

		$loaded_lists = get_option( 'zn_mailchimp_lists' );

		if( $loaded_lists && $refresh == false ) {
			return $loaded_lists;
		}
		elseif( $mailchimp_api = zget_option( $option_id , $option_page ) ) {

			require_once ( THEME_BASE .'/framework/classes/class-mailchimp.php' );

			$mailchimp = new ZnMailChimp($mailchimp_api);

			$lists = $mailchimp->call( 'lists/list' );

			$loaded_lists = array();

			if ( isset( $lists['data'] ) && is_array( $lists['data'] ) ) {
				foreach ( $lists['data'] as $key => $list ) {
					$loaded_lists[$list['id']] = $list['name'];
				}
			}

			add_option( 'zn_mailchimp_lists', $loaded_lists, '', false );
			return $loaded_lists;
		}
		else{
			return array();
		}

	}

/* CONVERTS A YOUTUBE LINK INTO AN EMBED */
	// function get_video_from_link( $string, $css = null , $width = '425px' , $height = '239px' ) {
		
	// 	// Save old string in case no video is provided
	// 	$old_string = $string;
	// 	$video_url = parse_url($string);
		
	// 	if ( $video_url['host'] == 'www.youtube.com' || $video_url['host'] == 'youtube.com' ) {
			
	// 		preg_match('#(?<=v=)[a-zA-Z0-9-]+(?=&)|(?<=v\/)[^&\n]+|(?<=v=)[^&\n]+|(?<=youtu.be/)[^&\n]+#', $string, $matches);
	// 		$string = '<iframe class="'.$css.'" width="'.$width.'" height="'.$height.'" src="//www.youtube.com/embed/'.$matches[0].'?iv_load_policy=3&enablejsapi=0&amp;wmode=transparent&amp;modestbranding=1&amp;rel=0&amp;showinfo=0&amp;feature=player_embedded" frameborder="0" allowfullscreen></iframe>';
		
	// 	}
	// 	elseif( $video_url['host'] == 'www.dailymotion.com' ){
	// 		$id = strtok(basename($old_string), '_');
	// 		$string = '<iframe frameborder="0" width="'.$width.'" height="'.$height.'" src="//www.dailymotion.com/embed/video/'.$id.'"></iframe>';
	// 	}
	// 	else {
	// 		$string = preg_replace('#http://(www\.)?vimeo\.com/([^ ?\n/]+)((\?|/).*?(\n|\s))?#i', '<iframe class="youtube-player '.$css.'" type="text/html" src="//player.vimeo.com/video/$2" width="'.$width.'" height="'.$height.'" frameborder="0" webkitAllowFullScreen mozallowfullscreen allowFullScreen></iframe>', $string);
	// 	}
		
	// 	// If no video link was provided return the full link
	// 	if ( $string != $old_string ) {
	// 		return $string;
	// 	}
	// 	else {
			
	// 		return;
	// 	}
	// }

	function get_video_id_from_link( $string ){
		// Save old string in case no video is provided
		$old_string = $string;
		$video_url = parse_url($string);

		if ( $video_url['host'] == 'www.youtube.com' || $video_url['host'] == 'youtube.com' ) {

			preg_match('#(?<=v=)[a-zA-Z0-9-]+(?=&)|(?<=v\/)[^&\n]+|(?<=v=)[^&\n]+|(?<=youtu.be/)[^&\n]+#', $string, $matches);
			$string = $matches[0];

		}

		// If no video link was provided return the full link
		if ( $string != $old_string ) {
			return $string;
		}
		else {
			return;
		}

	}

	function zn_hex_to_rgb($hex){
	    $hex = str_replace('#', '', $hex);
	    if ( strlen($hex) == 3 ) {
	        $hex = str_repeat(substr($hex,0,1), 2).str_repeat(substr($hex,1,1), 2).str_repeat(substr($hex,2,1), 2);
	    }
	    else{
	    	$hex = substr($hex,0,2).substr($hex,2,2).substr($hex,4,2);
	    	
	    }

	    return $hex;
	}

	function zn_hex2rgb($hex) {
	   $hex = str_replace("#", "", $hex);

	   if(strlen($hex) == 3) {
		  $r = hexdec(substr($hex,0,1).substr($hex,0,1));
		  $g = hexdec(substr($hex,1,1).substr($hex,1,1));
		  $b = hexdec(substr($hex,2,1).substr($hex,2,1));
	   } else {
		  $r = hexdec(substr($hex,0,2));
		  $g = hexdec(substr($hex,2,2));
		  $b = hexdec(substr($hex,4,2));
	   }
	   $rgb = array($r, $g, $b);
	   //return implode(",", $rgb); // returns the rgb values separated by commas
	   return $rgb; // returns an array with the rgb values
	}
	
	function zn_hex2rgb_str($hex){
		$hex = zn_hex2rgb($hex);
		return 'rgb('.$hex[0].','.$hex[1].','.$hex[2].')';
	}
	
	function zn_hex2rgba($hex, $percent = 100) {
		$rgb = zn_hex2rgb($hex);
		$argb = array($rgb[0], $rgb[1], $rgb[2], $percent/100);
		return $argb;
	}
	
	function zn_hex2rgba_str($hex, $percent = 100){
		$argb = zn_hex2rgba($hex, $percent);
		return 'rgba('.$argb[0].','.$argb[1].','.$argb[2].','.$argb[3].')';
	}

	function adjustBrightness($hex, $percentage_adjuster) {
	    // Steps should be between . Negative = darker, positive = lighter
		$percentage_adjuster = round( $percentage_adjuster/100,2 );

	    // Format the hex color string
      	$hex = str_replace("#","",$hex);
        $r = (strlen($hex) == 3)? hexdec(substr($hex,0,1).substr($hex,0,1)):hexdec(substr($hex,0,2));
        $g = (strlen($hex) == 3)? hexdec(substr($hex,1,1).substr($hex,1,1)):hexdec(substr($hex,2,2));
        $b = (strlen($hex) == 3)? hexdec(substr($hex,2,1).substr($hex,2,1)):hexdec(substr($hex,4,2));
        $r = round($r - (max(1,$r)*$percentage_adjuster));
        $g = round($g - (max(1,$g)*$percentage_adjuster));
        $b = round($b - (max(1,$b)*$percentage_adjuster));
 
        return "#".str_pad(dechex( max(0,min(255,$r)) ),2,"0",STR_PAD_LEFT)
            .str_pad(dechex( max(0,min(255,$g)) ),2,"0",STR_PAD_LEFT)
            .str_pad(dechex( max(0,min(255,$b)) ),2,"0",STR_PAD_LEFT);

	}

	function adjustBrightnessByStep($hex, $diff) {
		$rgb = str_split(trim($hex, '# '), 2);
	 
		foreach ($rgb as &$hex) {
			$dec = hexdec($hex);
			if ($diff >= 0) {
				$dec += $diff;
			}
			else {
				$dec -= abs($diff);			
			}
			$dec = max(0, min(255, $dec));
			$hex = str_pad(dechex($dec), 2, '0', STR_PAD_LEFT);
		}
	 
		return '#'.implode($rgb);

	}

function get_brightness($hex, $compare = false) {

	// strip off any leading #
	$hex = zn_hex_to_rgb($hex);

	$c_r = hexdec(substr($hex, 0, 2));
	$c_g = hexdec(substr($hex, 2, 2));
	$c_b = hexdec(substr($hex, 4, 2));

	$brighntess = (($c_r * 299) + ($c_g * 587) + ($c_b * 114)) / 1000;

	if ( $compare ) {
		$brighntess = $brighntess > $compare ? true : false;
	}

	return $brighntess;
}

	function zn_create_folder( &$folder, $addindex = true )
	{
	    if( is_dir( $folder ) && $addindex == false)
	        return true;

	    $created = wp_mkdir_p( trailingslashit( $folder ) );
	    // SET PERMISSIONS
	    @chmod( $folder, 0777 );

	    if($addindex == false) return $created;

	    // ADD AN INDEX.PHP FILE
	    $index_file = trailingslashit( $folder ) . 'index.php';
	    if ( file_exists( $index_file ) )
	        return $created;

	    $handle = @fopen( $index_file, 'w' );
	    if ($handle)
	    {
	        fwrite( $handle, "<?php\r\necho 'Directory browsing is not allowed!';\r\n?>" );
	        fclose( $handle );
	    }

	    return $created;
	}


	function zn_delete_folder( $path )
	{
		//echo $path;
		//check if folder exists
		if( is_dir( $path) )
		{

			$it = new RecursiveDirectoryIterator($path);
			$files = new RecursiveIteratorIterator($it, RecursiveIteratorIterator::CHILD_FIRST);

			foreach($files as $file) {
				if ($file->getFilename() === '.' || $file->getFilename() === '..') 
				{
					continue;
				}

				if ( $file->isDir() ){
					rmdir($file->getRealPath());
				} 
				else {
					unlink($file->getRealPath());
				}
			}

			rmdir($path);
		}
	}

	function find_file( $folder , $extension )
	{
		$files = scandir( $folder );
		
		foreach($files as $file)
		{ 
			if(strpos(strtolower($file), $extension )  !== false && $file[0] != '.')
			{
				return $file;
			}
		}

		return false;
	}

/*--------------------------------------------------------------------------------------------------
	zn_extract_link - This function will return the option
	@accepts : An link option
	@returns : array containing a link start and link end HTML
--------------------------------------------------------------------------------------------------*/
function zn_extract_link( $link_array , $class = false , $attributes = false ){

	if ( !is_array( $link_array ) || empty( $link_array['url'] ) ) { 
		$link['start'] = '';
		$link['end'] = '';
	}
	else{
		$link = array( 'start' => '<a href="'.esc_url( $link_array['url'] ).'" '.$attributes.' class="'.$class.'" title="'.esc_attr( $link_array['title'] ).'" target="'.esc_attr( $link_array['target'] ).'">' , 'end' => '</a>' );
	}

	return $link;

}

/*--------------------------------------------------------------------------------------------------
	Minimifyes CSS code
--------------------------------------------------------------------------------------------------*/
function zn_minimify( $css_code ){

	// Minimiy CSS
	$css_code = preg_replace('!/\*[^*]*\*+([^/][^*]*\*+)*/!', '', $css_code); // Remove comments
	$css_code = str_replace(': ', ':', $css_code); // Remove space after colons
	$css_code = str_replace(array("\r\n", "\r", "\n", "\t", '  ', '    ', '    '), '', $css_code); // Remove whitespace

	return $css_code;
}

/*--------------------------------------------------------------------------------------------------
	Sanitize string
--------------------------------------------------------------------------------------------------*/
function zn_sanitize_string( $string , $prepend = false , $not_empty = false ){

	$string = remove_accents( $string );
	$string = preg_replace(array('~[\W\s]~' , '/_+/'), '_', $string);
	$string = strtolower($string);

	if( $not_empty )
	{
		if(str_replace('_', '', $string) == '') return;
	}

	if ( $prepend ) {
		$string = $prepend . $string;
	}

	return $string;
}

function zn_make_theme_options_slug( $string ) {

	$string = strtolower($string);
	$invalid_characters = array("$", "%", "#", "<", ">", "|", " ");
	$string = str_replace($invalid_characters, "", $string);

	return $string;
}



function is_ajax_pb(){
	if ( current_user_can( 'edit_posts' ) && isset( $_POST['nonce'] ) && wp_verify_nonce($_POST['nonce'], 'ZnNonce') ) {
		return true;
	}
	else {
		return false;
	}
}

global $zn_current_post_id;
function zn_get_the_id() {
	global $zn_current_post_id;

	if ( isset( $zn_current_post_id ) ) {
		$id = $zn_current_post_id;
	}
	else{
		if( isset( $_POST['post_id'] ) ){
			$id = $zn_current_post_id = $_POST['post_id'];
		}
		else{
			$post = get_post();
			if(isset( $post->ID) ) {
				$id = $zn_current_post_id = get_queried_object_id();
			}
			else{
				$id = $zn_current_post_id = false;
			}
			
		}
	}

	$id = apply_filters('zn_get_the_id', $id);

	return $id;

}

/*--------------------------------------------------------------------------------------------------
	Preety print
--------------------------------------------------------------------------------------------------*/
function print_z($string) {
	echo '<pre>';
		print_r($string);
	echo '</pre>';
}

/*--------------------------------------------------------------------------------------------------
	Sanitize string for widgets
--------------------------------------------------------------------------------------------------*/
function zn_sanitize_widget_id($id){
	return str_replace(' ','_',strtolower($id) );
}
/*--------------------------------------------------------------------------------------------------
	Check if the debug flag was set
--------------------------------------------------------------------------------------------------*/
function zn_is_debug(){
	if( isset(ZN()->theme_data['debug']) && ZN()->theme_data['debug'] === true ){
		return true;
	}
	else{
		return false;
	}

}

/*--------------------------------------------------------------------------------------------------
	Create dynamic css
--------------------------------------------------------------------------------------------------*/
function generate_options_css( $data = false ) {

	global $zn_framework, $saved_options;

	/* CLEAR THE FW OPTIONS CACHE */
	$saved_options = false;

	/** Define some vars **/
	$uploads = wp_upload_dir();
	$css_dir = apply_filters( 'zn_dynamic_css_location', THEME_BASE. '/css/'); // Shorten code, save 1 call

	$zn_uploads_dir = trailingslashit( $uploads['basedir'] );
	
	/** Capture CSS output **/
	ob_start();
	require($css_dir . 'dynamic_css.php');
	$css = ob_get_clean();

	$css = apply_filters('zn_dynamic_css',$css);
	$css = zn_minimify( $css );

	/** Write to zn_dynamic.css file **/
	file_put_contents( $zn_uploads_dir . 'zn_dynamic.css', $css );

}

/*--------------------------------------------------------------------------------------------------
	Adds user generated custom css
--------------------------------------------------------------------------------------------------*/
add_filter( 'zn_dynamic_css', 'add_custom_css', 100 );
function add_custom_css( $css ){

	$saved_css = '';
	$uploads = wp_upload_dir();
	$zn_uploads_dir = trailingslashit( $uploads['basedir'] );
	if ( file_exists( $zn_uploads_dir . 'zn_custom_css.css') ){
		$saved_css = file_get_contents( $zn_uploads_dir . 'zn_custom_css.css' );
	}
			
	$new_css = $css  . $saved_css;

	return $new_css;
}


/* CUSTOM WP_FOOTER FUNCTION
	Fixes problems with next gen gallery
*/
function zn_footer(){
	do_action('zn_footer');
}

/**
 * Checks if a plugin is installed. The $plugin variable should contain the plugin name and main file ( for example zn_framework/zn_framework.php )
 * @param type $plugin 
 * @return bool
 */
function zn_is_plugin_installed( $plugin ){
	if ( file_exists( WP_PLUGIN_DIR . '/' . $plugin ) ) {
		return true;
	} else {
		return false;
	}
}

?>