pizza-settings-page.php

<?php
/*
*	WP Pizzeria plugin settings pag
*/

/* Add submenu */
add_action('admin_menu', 'wp_pizzeria_menu_item');

function wp_pizzeria_menu_item() {	    	     	   
	add_menu_page( esc_html__("WP Pizzeria Settings", 'wp_pizzeria'), esc_html__("WP Pizzeria", 'wp_pizzeria'), 'manage_options', 'wp_pizzeria_settings', 'wp_pizzeria_settings' );
}     
	
/* Settings page main function */
function wp_pizzeria_settings(){
	// Check for relevant permission
	if ( false === current_user_can('manage_options') ) {
		wp_die( esc_html__( "You don't have permission to access this page." ) );
	}
	/* Save function */
	if ( true === isset( $_POST['wp_pizzeria_settings_submit'] ) ) {
		$pizzeria_settings = maybe_unserialize( get_option('wp_pizzeria_settings') );
		if ( false === is_array($pizzeria_settings) ) {
			$pizzeria_settings = array();
		}

		// Update default price after changing default size
		if ( true === array_key_exists('primary',$pizzeria_settings['sizes'] ) ) {
			$old_primary = $pizzeria_settings['sizes']['primary'];
		} else {
			$old_primary = '';
		}
		if ( sanitize_title($_POST['primary']) !== $old_primary) {
			$all_pizzas = get_posts( array('post_type' => 'wp_pizzeria_pizza','numberposts' => -1) );
			foreach ($all_pizzas as $post){
				unset($pizza_prices);
				setup_postdata($post);
				$pizza_prices = maybe_unserialize( get_post_meta($post->ID, 'wp_pizzeria_prices', true) );
				update_post_meta( $post->ID, 'wp_pizzeria_price', $pizza_prices[sanitize_title($_POST['primary'])] );	
			}
		}		
		// Save new sizes
		unset($pizzeria_settings['sizes']);

		if ( true === isset( $_POST['size'] ) ) {
			$primary = $_POST['primary'];
			foreach ( $_POST['size'] as $size ) {
				if ( false === empty( $size ) ) {
					$pizzeria_settings['sizes'][sanitize_title( $size )] = $size;
					if ( $size === $primary ) {
						$pizzeria_settings['sizes']['primary'] = sanitize_title( $size );
					}
				}	
			}	
		}
		// Save currency
		if ( true === isset( $_POST['wp_pizzeria_currency'] )
		     && '' !== trim( $_POST['wp_pizzeria_currency'] )
		) {
			$pizzeria_settings['currency'] = sanitize_text_field( $_POST['wp_pizzeria_currency'] );
		}
		if ( true === isset( $_POST['wp_pizzeria_currency_position'] )
		     && true === in_array( $_POST['wp_pizzeria_currency_position'], array( 'before', 'after' ), true )
		) {
			$pizzeria_settings['currency_pos'] = sanitize_text_field( $_POST['wp_pizzeria_currency_position'] );
		}
		update_option( 'wp_pizzeria_settings', maybe_serialize( $pizzeria_settings ) ); 	 	
	}
	/* Settings page UI */
	?>	
	<div class="wrap">
		<div id="icon-options-general" class="icon32 icon32-posts-wp_pizzeria_pizza"><br/></div>
		<h2><?php esc_html_e('WP Pizzeria plugin settings', 'wp_pizzeria'); ?></h2>
		<br/><br/>
		<?php
			$pizzeria_settings = maybe_unserialize( get_option('wp_pizzeria_settings') );
			if ( false === is_array( $pizzeria_settings ) )
				$pizzeria_settings = array();	
		?>
		<form action="<?php echo esc_url( add_query_arg( array() ) ); ?>" method="post">
			<table class="form-table">
				<tr>
					<th><?php esc_html_e('Pizza sizes', 'wp_pizzeria'); ?></th>
					<td>
						<div id="sizes">
						<?php 
							if ( true === array_key_exists( 'sizes', $pizzeria_settings ) ) :
								foreach ( $pizzeria_settings['sizes'] as $key => $size ) :
									if ( 'primary' === $key ) {
										continue;
									}
						?>
							<div class="size">
								<label for="<?php echo $size; ?>">
									<input type="radio" name="primary" value="<?php echo esc_attr( $size ); ?>"<?php checked( $pizzeria_settings['sizes']['primary'], $key ); ?>/>
									<input type="text" name="size[]" id="<?php echo esc_attr( $size ); ?>" value="<?php echo esc_attr( $size ); ?>" />
								</label>
								<span><a href="#" title="<?php esc_attr_e('Remove', 'wp_pizzeria'); ?>" class="remove"><?php esc_html_e('Remove', 'wp_pizzeria'); ?></a></span>
								</div>
						<?php endforeach;
								endif; ?>
						</div>
						<a href="#" title="<?php esc_attr_e('Add pizza size'); ?>" id="add_pizza_size"><?php esc_html_e('Add pizza size'); ?></a>
						<?php /* Todo: use sprintf */ ?>
						<p class="description">Check the radio button (<input type="radio" checked="checked"/>) beside pizza size to set this size as default</p>						
					</td>					
				</tr>
				<tr>
					<th><label for="wp_pizzeria_currency"><?php esc_html_e('Currency', 'wp_pizzeria'); ?></label></th>
					<td>
						<?php 
							if( false === array_key_exists('currency', $pizzeria_settings) )
								$pizzeria_settings['currency'] = '';
						?>
						<input type="text" value="<?php echo esc_attr( $pizzeria_settings['currency'] ); ?>" name="wp_pizzeria_currency" id="wp_pizzeria_currency" />
						<p class="desctiption"><?php esc_html_e( 'Add your currency sign to display it next to your price. Include also spaces if necessary.', 'wp_pizzeria' ); ?></p>
					</td>				
				</tr>
				<tr>
					<th><label for="wp_pizzeria_currency_position"><?php esc_html_e('Currency position', 'wp_pizzeria'); ?></label></th>
					<td>
						<?php 
							if( false === array_key_exists('currency_pos', $pizzeria_settings) ) {
								$pizzeria_settings['currency_pos'] = 'after';
							}
						?>
						<select name="wp_pizzeria_currency_position" id="wp_pizzeria_currency_position">
							<option value="before"<?php if ( $pizzeria_settings['currency_pos'] == 'before' ){ echo ' selected="selected"'; } ?>><?php esc_html_e('Before', 'wp_pizzeria'); ?></option>
							<option value="after"<?php if ( $pizzeria_settings['currency_pos'] == 'after' ){ echo ' selected="selected"'; } ?>><?php esc_html_e('After', 'wp_pizzeria'); ?></option>
						</select>
						<p class="desctiption"><?php esc_html_e( 'Select position of currency sign relative to price', 'wp_pizzeria' ); ?></p>
					</td>				
				</tr>
			</table>
			<p class="submit">
				<input type="submit" value="<?php esc_attr_e('Save'); ?>" name="wp_pizzeria_settings_submit" class="button-primary"/>
			</p>
		</form>
	</div>
	<script type="text/javascript" >
		jQuery(document).ready(function($){
			$('#add_pizza_size').click(function(e){
				e.preventDefault();
				$('#sizes').append('<div class="size"><input type="radio" value="" name="primary"/><input type="text" name="size[]" class="new_price" value="" />&nbsp; <span><a href="#" title="<?php esc_attr_e('Remove', 'wp_pizzeria'); ?>" class="remove"><?php esc_html_e('Remove', 'wp_pizzeria'); ?></a></span></div>');
			})
			$('.new_price').live('change', function(){
				var value = $(this).val();
				$(this).siblings('[name="primary"]').val(value);
			});	
			$('.remove').live('click', function(e){
				e.preventDefault();
				$(this).parent().remove();	
			});
		});
	</script>
<?php	
}