wordpress category-taxonomy template

<?php 
 if (!class_exists('aduta_Category_Template')){
	class aduta_Category_Template{

	    /*
	    *  class constructor
	    */
	    public function __construct()
	    {
	    	/*
		    *  template selection
		    */

	        // Category

	        add_filter( 'category_template', array($this,'get_aduta_category_template' ));

	        // Taxonomy

	        add_filter( 'template_include', array($this,'get_aduta_taxonomy_template' ));

	        // add extra fields to category NEW/EDIT form hook
	        add_action ( 'edit_category_form_fields', array($this,'category_template_meta_box'));
	        add_action( 'category_add_form_fields', array( &$this, 'category_template_meta_box') );

	        add_action('admin_init',array($this,'init'),999);

	        // save extra category extra fields hook
	        add_action( 'created_category', array( &$this, 'save_category_template' ));
	        add_action ( 'edited_category', array($this,'save_category_template'));
	        
	        //extra action on constructor
	        do_action('aduta_Category_Template_constructor',$this);
	    }
			
		public function init(){
			$args=array(
			  'public'   => true,
			  '_builtin' => false
			  
			); 
			$output = 'names';
			$operator = 'and';
			$taxonomies=get_taxonomies($args,$output,$operator);
			$exclude = apply_filters('custom_taxonomy_template_tax_exclude',array());
			if  ($taxonomies) {
			 	foreach ($taxonomies  as $taxonomy ) {
					if (!in_array($taxonomy,$exclude)){
					  	//add extra fields to taxonomy edit form hook
		    		    add_action ( $taxonomy.'_edit_form_fields', array($this,'taxonomy_template_meta_box'));
			    	    add_action( $taxonomy.'_add_form_fields', array( &$this, 'taxonomy_template_meta_box') );
				        // save extra taxonomy extra fields hook
						add_action ( 'edited_'.$taxonomy, array($this,'save_taxonomy_template'));
		    			add_action ( 'created_'.$taxonomy, array($this,'save_taxonomy_template'));
					}
			  	}
			}
		}

	    /**
	     * category_template_meta_box add extra fields to category edit form callback function
	     */
	    public function category_template_meta_box( $tag ) 
	    {
	        $t_id = $tag->term_id;
	        $category_meta = get_option( "category_templates");
	        $template = isset($category_meta[$t_id]) ? $category_meta[$t_id] : false;
	        ?>
	        <tr class="form-field">
	            <th scope="row" valign="top"><label for="cat_Image_url"><?php _e('Category Template'); ?></label></th>
	            <td>
	                <select name="cat_template" id="cat_template">
	                    <option value='default'><?php _e('Default Template'); ?></option>
	                    <?php page_template_dropdown($template); ?>
	                </select>
	                <br />
	                    <span class="description"><?php _e('Select a specific template for this category'); ?></span>
	            </td>
	        </tr>
	        <?php
	        do_action('aduta_Category_Template_ADD_FIELDS',$tag);
	    }
	    public function taxonomy_template_meta_box( $tag ) 
	    {
		    $t_id = isset($tag->term_id) ? $tag->term_id: 0;
		    $tax_meta = get_option( "taxonomy_templates");
		    $template = isset($tax_meta[$t_id]) ? $tax_meta[$t_id] : false;
			?>
			<tr class="form-field">
				<th scope="row" valign="top"><label for="cat_Image_url"><?php _e('taxonomy Template'); ?></label></th>
				<td>
					<select name="tax_template" id="tax_template">
						<option value='default'><?php _e('Default Template'); ?></option>
						<?php page_template_dropdown($template); ?>
					</select>
					<br />
			            <span class="description"><?php _e('Select a specific template for this taxonomy'); ?></span>
			    </td>
			</tr>
			<?php
			do_action('Custom_Taxonomy_Template_ADD_FIELDS',$tag);
		}

	    /**
	     * save_category_template save extra category extra fields callback function
	     */
	    public function save_category_template( $term_id ) {
	        if ( isset( $_POST['cat_template'] )) {
	            $category_meta = get_option( "category_templates");
	            $category_meta[$term_id] = $_POST['cat_template'];
	            update_option( "category_templates", $category_meta );
	            do_action('aduta_Category_Template_SAVE_FIELDS',$term_id);
	        }
	    }
		public function save_taxonomy_template( $term_id ) 
		{
		    if ( isset( $_POST['tax_template'] ) ) {
		        $tax_meta = get_option( "taxonomy_templates");
		        $tax_meta[$term_id] = $_POST['tax_template'];
		        update_option( "taxonomy_templates", $tax_meta );
		        do_action('Custom_Taxonomy_Template_SAVE_FIELDS',$term_id);
		    }
		}

	    /**
	     * get_aduta_category_template handle category template picking
	     */
	    function get_aduta_category_template( $category_template ) {
			$cat_ID = absint( get_query_var('cat') );
			$category_meta = get_option('category_templates');
			if (isset($category_meta[$cat_ID]) && $category_meta[$cat_ID] != 'default' ){
				$temp = locate_template($category_meta[$cat_ID]);
				if (!empty($temp))
					return apply_filters("aduta_Category_Template_found",$temp);
			}
		    return $category_template;
		}
	    function get_aduta_taxonomy_Template( $taxonomy_template ) {
			if (!is_tax())
				return $taxonomy_template;
			$term_slug = get_query_var( 'term' );
			$taxonomyName = get_query_var( 'taxonomy' );
			$current_term = get_term_by( 'slug', $term_slug, $taxonomyName );

			$term_ID = $current_term->term_id;
			$tax_meta = get_option('taxonomy_templates');
			if (isset($tax_meta[$term_ID]) && $tax_meta[$term_ID] != 'default'){
				$temp = locate_template($tax_meta[$term_ID]);
				if (!empty($temp))
					return apply_filters("Custom_Taxonomy_Template_found",$temp);
			}
		    return $taxonomy_template;
		}
	}//end class
}//end if
$cat_template = new aduta_Category_Template();

?>