<?php  if ( ! defined('AVIA_FW')) exit('No direct script access allowed');
/**
 * This file holds the class that creates styles for the theme based on the backend options
 *
 *
 * @author		Christian "Kriesi" Budschedl
 * @copyright	Copyright (c) Christian Budschedl
 * @link		http://kriesi.at
 * @link		http://aviathemes.com
 * @since		Version 1.0
 * @package 	AviaFramework
 */

/**
 *
 */


if( !class_exists( 'avia_style_generator' ) )
{


	/**
	 *  The avia_style_generator class holds all methods necessary to create and overwrite the default css styles with those set in the wordpress backend
	 *  @package 	AviaFramework
	 */

	class avia_style_generator
	{

		/**
		 * This array hold all styledata defined for the theme that should be overwriten dynamically
		 * @var array
		 */
		var $rules;

		/**
		 * $output contains the html string that is printed in the frontend
		 * @var string
		 */
		var $output = "";

		/**
		 * $extra_output contains html content that should be printed after the actual css rules. for example a javascript with cufon rules
		 * @var string
		 */
		var $extra_output = "";

        /*
         * Add print var to check if we need to output style tags or not
         */
        var $print_styles = '';
        var $print_extra_output = '';
        var $used_fonts = array();
        var $google_fontlist = "";
        
        var $stylewizard = array();	// holds all available styling rules that are defined in the config files 
        var $stylewizardIDs = array(); // holds all saved elements that contain rules
		
		/**
		 *
		 * @since 4.5.1
		 * @var array 
		 */
		protected $fallback_fonts;

        public function __construct(&$avia_superobject, $print_styles = true, $print_extra_output = true, $addaction = true)
        {
            $this->print_styles = $print_styles;
            $this->print_extra_output = $print_extra_output;
			
			$this->fallback_fonts = array(
										"'HelveticaNeue'", 
										"'Helvetica Neue'",
										"'Helvetica-Neue'", 
										'Helvetica', 
										'Arial', 
										'sans-serif'
								);
            

            //check if stylesheet exists...
			$safe_name = avia_backend_safe_string($avia_superobject->base_data['prefix']);
			
            if( get_option('avia_stylesheet_exists'.$safe_name) == 'true' ) $this->print_styles = false;
		
			$this->get_style_wizard_additions($avia_superobject->option_page_data);	

            if($addaction) 
            {
            	add_action('wp_head',array(&$this, 'create_styles'),5);
            	add_action('wp_head',array(&$this, 'print_extra_output'),5);
            	add_action('wp_head',array(&$this, 'print_styles'),1000);
            	add_action('wp_footer',array(&$this, 'print_footer'),1000);
        	}
        }

        public function __destruct()
        {
			unset( $this->rules );
            unset( $this->print_styles );
            unset( $this->print_extra_output );
			unset( $this->used_fonts );
			unset( $this->stylewizard );
			unset( $this->stylewizardIDs );
			unset( $this->fallback_fonts );
        }
        
        // gather styling wizard elements so the rules can be converted as well
        function get_style_wizard_additions($option_page_data)
        {
        	foreach($option_page_data as $data)
        	{
        		if($data['type'] == 'styling_wizard') 
        		{
        			$this->stylewizardIDs[] = $data['id'];
        			$this->stylewizard = array_merge($this->stylewizard, $data['elements']);
        		}
        	}
        }
		
		/**
		 * Returns a filterable array of fallback fonts that can be used to add to the font-family.
		 * Default is Helvetia family
		 * 
		 * @since 4.5.1
		 * @param string $selected_font_family
		 * @return array
		 */
		public function get_fallback_fonts_array( $selected_font_family )
		{
			return apply_filters( 'avf_fallback_fonts_array', $this->fallback_fonts, $selected_font_family );
		}
		
		/**
		 * Returns the font family string extended with the fallback fonts.
		 * Tries to filter double entries.
		 * 
		 * @since 4.5.1
		 * @param string $selected_font_family
		 * @param string $rule
		 * @return string
		 */
		public function font_family_string( $selected_font_family, $rule = '' )
		{
			$fallback = $this->get_fallback_fonts_array( $selected_font_family );
			
			$plain_selected = strtolower( str_replace( array( '"', "'" ), '', $selected_font_family ) );
			foreach( $fallback as $key => $font ) 
			{
				$plain_font = strtolower( str_replace( array( '"', "'" ), '', $font ) );
				if( ( stripos( $rule, $font ) !== false ) || ( $plain_selected == $plain_font ) )
				{
					unset( $fallback[ $key ] );
				}
			}
			
			$family = "'{$plain_selected}'";
			
			if( ! empty( $fallback ) )
			{
				$family .= ', ';
				$family .= implode( ', ', $fallback );
			}
			
			return $family;
		}
				
		
		function create_styles()
		{
			global $avia_config;
			if(!isset($avia_config['font_stack'])) $avia_config['font_stack'] = "";
			if(!isset($avia_config['style'])) return;

			$avia_config['style'] = apply_filters('avia_style_filter',$avia_config['style']);
			$this->rules = $avia_config['style'];
			
			/**
			 * @used_by				AviaTypeFonts			10
			 * @since 4.3
			 */
			$this->output = apply_filters( 'avf_create_dynamic_stylesheet', $this->output, $this, 'before' );
			
			//default styling rules
			if(is_array($this->rules))
			{
				foreach($this->rules as $rule)
				{
					
					$rule['value'] = str_replace('{{AVIA_BASE_URL}}', AVIA_BASE_URL, $rule['value']);
					$rule['value'] = preg_replace('/(http|https):\/\//', '//', $rule['value']);
					
					//check if a executing method was passed, if not simply put the string together based on the key and value array
					if(isset($rule['key']) && method_exists($this, $rule['key']) && $rule['value'] != "")
					{
						$this->output .= $this->{$rule['key']}($rule)."\n";
					}
					else if($rule['value'] != "")
					{
						$this->output .= $rule['elements']."{\n".$rule['key'].":".$rule['value'].";\n}\n\n";
					}

				}
			}
			
			//css wizard styling rules
			$this->create_wizard_styles();
			
			/**
			 * @since 4.3
			 */
			$this->output = apply_filters( 'avf_create_dynamic_stylesheet', $this->output, $this, 'after' );
				
            //output inline css in head section or return the style code
            if( !empty($this->output) )
            {
                if( !empty($this->print_styles) )
                {
                    
                }
                else
                {
                    $return = $this->output;
                }
            }
            
            if(!empty($return)) return $return;
		}
		
		
		
		function create_wizard_styles()
		{
			if(empty($this->stylewizardIDs)) return;
			
			global $avia_config;
			
			foreach($this->stylewizardIDs as $id)
			{
				$options = avia_get_option($id);
				if(empty($options)) continue;
				
				foreach($options as $style)
				{
				
					if(empty($this->stylewizard[$style['id']]['selector'])) continue;
				
					//first of all we need to build the selector string
					$selectorArray 	= $this->stylewizard[$style['id']]['selector'];
					$sectionCheck	= $this->stylewizard[$style['id']]['sections'];
					
					
					foreach($selectorArray as $selector => $ruleset)
					{
						$temp_selector  = "";
						$rules			= "";
						$sectionActive  = strpos($selector, '[sections]') !== false ? true : false;
					
						//hover check
						if(isset($style['hover_active']) && $style['hover_active'] != 'disabled')
						{
							$selector = str_replace("[hover]", ":hover", $selector);
						}
						else
						{
							$selector = str_replace("[hover]", "", $selector);
						}
			
						//active check
						if(isset($style['item_active']) && $style['item_active'] != 'disabled' && isset(  $this->stylewizard[$style['id']]['active'] ))
						{
							$selector = str_replace("[active]", $this->stylewizard[$style['id']]['active'] , $selector);
						}
						else
						{
							$selector = str_replace("[active]", "", $selector);
						}
						
						//if sections are enabled make sure that the selector string gets generated for each section
						if($sectionActive && $sectionCheck && isset($avia_config['color_sets']))
						{
							//check if all color sections are selected. if so we dont need to loop several times but only once
							$all_sets_selected 		= true;
							$color_sets_to_iterate 	= $avia_config['color_sets'];
							
							foreach($avia_config['color_sets'] as $key => $name)
							{
								if( empty($style[$key]) ||  (isset($style[$key]) && $style[$key] == 'disabled'))
								{
									$all_sets_selected = false;
								}
							}
							
							if($all_sets_selected)
							{
								$color_sets_to_iterate = array('all_colors' => '');
							}
							
							foreach($color_sets_to_iterate as $key => $name)
							{
								if( (isset($style[$key]) && $style[$key] != 'disabled' ) || $key == 'all_colors')
								{
									if(!empty($temp_selector)) $temp_selector .= ", ";
									$temp_selector .= str_replace("[sections]", ".".$key, $selector);
								}
							}
							
							if(empty($temp_selector)) continue;
						}
						
						//apply modified rules to the selector
						if(!empty($temp_selector)) $selector = $temp_selector;
						
						
						//we got the selector stored in $selector, now we need to generate the rules
						foreach($style as $key => $value)
						{
			
							if($value != "" && $value != "true" && $value != "disabled" && $key != "id")
							{
								if( is_array( $ruleset ) )
								{
									foreach($ruleset as $rule_key => $rule_val)
									{
										//if the $rule_val is an array we only apply the rules if the user selected value is the same as the first rule_val entry
										if(is_array($rule_val))
										{
											if($rule_val[0] !== $value)
											{
												continue;
											}
											else
											{
												$rule_val = $rule_val[1];
											}
										}
										
										if($rule_key == $key )
										{
											if(str_replace('_','-',$rule_key) == "font-family")
											{
												$typefont = AviaSuperobject()->type_fonts();
												$font = $typefont->split_font_info( $value );
												
												if( 'google' != $typefont->get_selected_font_type( $font ) )
												{
													$font = $typefont->set_font_family( $font );
												}
												else
												{
													$this->add_google_font( $font['family'], $font['weight'] );
												}
												
//	replaced in 4.5.1 - can be removed in future releases:												
//												$value = "'" . $font['family'] . "', 'Helvetica Neue', Helvetica, Arial, sans-serif";
												
												$value = $this->font_family_string( $font['family'], $rule_val );
											}
											
											$rules .= str_replace( "%{$key}%", $value, $rule_val );
											
										}
									}
								}
								else
								{
									$key = str_replace('_','-',$key);
								
									switch( $key )
									{
										case "font-family": 
											
											$typefont = AviaSuperobject()->type_fonts();
											$font = $typefont->split_font_info( $value );
											
											if( 'google' != $typefont->get_selected_font_type( $font ) )
											{
												$font = $typefont->set_font_family( $font );
											}
											else
											{
												$this->add_google_font( $font['family'], $font['weight'] );
											}
																					
//	replaced in 4.5.1 - can be removed in future releases:
//											$rules .= "font-family: '{$font['family']}', 'Helvetica Neue', Helvetica, Arial, sans-serif;"; 
											
											$family = $this->font_family_string( $font['family'] );
											$rules .= "font-family: {$family};";
											break;
										default: 			
											$rules .= "{$key}:{$value};"; 
											break;
									}
								}
							}
						}
						
						if(!empty($rules))
						{
							$this->output .= $selector.'{'.$rules.'}' . "\r\n";
						}
					}
				}
			}
		}
		
		




		function print_styles()
		{	
			if(empty($this->print_styles)) return;
		
			echo "\n<!-- custom styles set at your backend-->\n";
			echo "<style type='text/css' id='dynamic-styles'>\n";
			echo $this->output;
			echo "</style>\n";
			echo "\n<!-- end custom styles-->\n\n";
		}


        function print_extra_output()
        {
        	if($this->print_extra_output) 
        	{
	        	$fonts = avia_get_option('gfonts_in_footer');
        		if(empty($fonts) || $fonts == "disabled") $this->extra_output .= $this->link_google_font();
        		
        		echo $this->extra_output;
        	}
        }
        
        function print_footer()
        {
	        $fonts = avia_get_option('gfonts_in_footer');
        	if(!empty($fonts) && $fonts == "gfonts_in_footer") $this->footer = $this->link_google_font();
	        
        	if(!empty($this->footer)) 
        	{
        		echo $this->footer;
        	}
        }


		function cufon($rule)
		{
			if(empty($this->footer)) $this->footer = "";
			
			$rule_split = explode('__',$rule['value']);
			if(!isset($rule_split[1])) $rule_split[1] = 1;
			$this->footer .= "\n<!-- cufon font replacement -->\n";
			$this->footer .= "<script type='text/javascript' src='".AVIA_BASE_URL."fonts/cufon.js'></script>\n";
			$this->footer .= "<script type='text/javascript' src='".AVIA_BASE_URL."fonts/".$rule_split[0].".font.js'></script>\n";
			$this->footer .= "<script type='text/javascript'>\n\t
			var avia_cufon_size_mod = '".$rule_split[1]."'; \n\tCufon.replace('".$rule['elements']."',{  fontFamily: 'cufon', hover:'true' }); \n</script>\n";
		}

		/**
		 * Add custom font settings
		 * 
		 * @param array $rule
		 */
		function google_webfont( array $rule )
		{
			global $avia_config;
			
			/**
			 * check if the font has a weight applied to it and extract it. eg: "Yanone Kaffeesatz:200"
			 */
			$typefont = AviaSuperobject()->type_fonts();
			$font = $typefont->split_font_info( $rule['value'] );
			$type = $typefont->get_selected_font_type( $font );
			
			/**
			 * Allow to specify a specific font size in selectbox
			 * e.g. myfont__1.5, google_font__1.5::100,300,500
			 */
			$rule_split = explode( '__', $font['family'] );
			$font['family'] = $rule_split[0];
			if( ! isset( $rule_split[1] ) ) 
			{
				$rule_split[1] = 1;
			}
			$font_weight = '';
			
			if( 'google' != $type )
			{
				$font = $typefont->set_font_family( $font );
				
				/**
				 * FF does not recognise when ' ' at beginning !!
				 */
				if( ! empty( $avia_config['font_stack'] ) )
				{
					$avia_config['font_stack'] .= ' ';
				}
				
				$avia_config['font_stack'] .= $font['family'] . '-' . $type;
				
				if( 'websave' == $type )
				{
					$font['family'] = str_replace( '-', ' ' , $font['family'] );
				}
			}
			else
			{
				$this->add_google_font( $font['family'], $font['weight'] );
			
				if( ! empty( $font_weight ) && strpos( $font_weight, ',' ) === false ) 
				{ 
					$font_weight = "font-weight:" . $font_weight . ";";
				} 
			}
			
			$font_css = strtolower( str_replace( " ", "_" , $font['family'] ) );

//	replaced in 4.5.1 - can be removed in future releases:
//			$this->output .= $rule['elements'] . ".{$font_css} {font-family:'" . $font['family'] ."', 'HelveticaNeue', 'Helvetica Neue', Helvetica, Arial, sans-serif;" . $font_weight . "}";
			
			$family = $this->font_family_string( $font['family'] );
			$this->output .= $rule['elements'] . ".{$font_css} {font-family:{$family}; {$font_weight}}";
			
			if( $rule_split[1] !== 1 && $rule_split[1] ) 
			{
				$this->output .= $rule['elements'] . "{font-size:" . $rule_split[1]  ."em;}";
			}
			
			$avia_config['font_stack'] .= " " . $font_css . " ";
		}
		
		
		//add the font to the query string
		function add_google_font($font_family, $font_weight = "")
		{
			if(!in_array($font_family.$font_weight, $this->used_fonts))
			{
				$this->used_fonts[] = $font_family.$font_weight;
				if(!empty($this->google_fontlist)) $this->google_fontlist .= "%7C";
				if(!empty($font_weight)) $font_weight = ":".$font_weight;
				
				$this->google_fontlist .= str_replace(' ','+',$font_family).$font_weight;
			}
		}
		
		
		//write the link tag with the $this->google_fontlist
		function link_google_font()
		{
			if( empty( $this->google_fontlist ) ) 
			{
				return '';
			}
			
			if( true != apply_filters( 'avf_output_google_webfonts_script', true ) )
			{
				return '';
			}
			
			$output  = "";
			$output .= "\n<!-- google webfont font replacement -->\n";
			$output .= "
			<script type='text/javascript'>
			if(!document.cookie.match(/aviaPrivacyGoogleWebfontsDisabled/)){
				(function() {
					var f = document.createElement('link');
					
					f.type 	= 'text/css';
					f.rel 	= 'stylesheet';
					f.href 	= '//fonts.googleapis.com/css?family=".apply_filters('avf_google_fontlist', $this->google_fontlist)."';
					f.id 	= 'avia-google-webfont';
					
					document.getElementsByTagName('head')[0].appendChild(f);
				})();
			}
			</script>
			";
			
			return $output;
		}
		
		
		

		function direct_input($rule)
		{
			return $rule['value'];
		}

		function backgroundImage($rule)
		{
			return $rule['elements']."{\nbackground-image:url(".$rule['value'].");\n}\n\n";
		}


	}
}

