<?php
/**
 * Helper function to assist with modifying the Customizer Controls (add, remove, etc).
 *
 */

/**
 * Insert controls before specific controls in the config array.
 *
 * @param    string $key           Key of the elemt that you want to insert-before
 * @param    array $config         The existing config array to be modified
 * @param    array $new_elements   Nested array containing new field elements
 * @return   array                 The newly modified config array
 */
if( ! function_exists( 'layers_insert_config_elements_before' ) ) {
	function layers_insert_config_elements_before( $key, $config, $new_elements ) {
		
		if ( isset( $config[$key] ) ) {
			
			/**
			 * This case is for one-dimentional config arrays e.g. Sections, Panels
			 */
			$offset = ( array_search( $key, array_keys( $config ) ) );
			
			$config =	array_slice( $config, 0, $offset, true ) +
							$new_elements +
							array_slice( $config, $offset, count( $config ) - 1, true );
		}
		else {
			
			/**
			 * This case is for multi-dimentional config arrays e.g. Controls
			 */
			foreach ( $config as $group_key => $group_array ) {
				
				if ( isset( $group_array[$key] ) ) {
					
					$offset = ( array_search( $key, array_keys( $group_array ) ) );
					
					$group_array =	array_slice( $group_array, 0, $offset, true ) +
									$new_elements +
									array_slice( $group_array, $offset, count( $group_array ) - 1, true );
									
					$config[$group_key] = $group_array;
				}
			}
		}
		
		return $config;
	}
}

/**
 * Insert controls after specific controls in the config array.
 *
 * @param    string $key           Key of the elemt that you want to insert-after
 * @param    array $config         The existing config array to be modified
 * @param    array $new_elements   Nested array containing new field elements
 * @return   array                 The newly modified config array
 */
if( ! function_exists( 'layers_insert_config_elements_after' ) ) {
	function layers_insert_config_elements_after( $key, $config, $new_elements ) {
		
		if ( isset( $config[$key] ) ) {
			
			/**
			 * This case is for one-dimentional config arrays e.g. Sections, Panels
			 */
			$offset = ( array_search( $key, array_keys( $config ) ) ) + 1;
			
			$config =	array_slice( $config, 0, $offset, true ) +
						$new_elements +
						array_slice( $config, $offset, count( $config ) - 1, true );
		}
		else {
			
			/**
			 * This case is for multi-dimentional config arrays e.g. Controls
			 */
			foreach ( $config as $group_key => $group_array ) {
			
				if ( isset( $group_array[$key] ) ) {
					
					$offset = ( array_search( $key, array_keys( $group_array ) ) ) + 1;
					
					$group_array =	array_slice( $group_array, 0, $offset, true ) +
									$new_elements +
									array_slice( $group_array, $offset, count( $group_array ) - 1, true );
									
					$config[$group_key] = $group_array;
				}
			}
		}
		
		return $config;
	}
}

/**
 * Remove control from config array.
 *
 * @param    string $key           Key of the element that you want to remove
 * @param    array $config         The existing config array to be modified
 * @return   array                 The newly modified config array
 */
if( ! function_exists( 'layers_remove_config_element' ) ) {
	function layers_remove_config_element( $key, $config ) {
		
		foreach ( $config as $group_key => $group_array ) {
			
			// Remove top level elements - like the Panels & Sections.
			if ( $key == $group_key ) unset( $config[$key] );
			
			// Remove deeper level elements - like the Controls.
			if ( isset( $group_array[$key] ) ) {
				unset( $group_array[$key] ); // Remove it.
				$config[$group_key] = $group_array; // Return it to the config array.
			}
		}
		
		return $config;
	}
}