Control automatic .htaccess update

In some case, users might want to disable automatic configuration.
Henceforth, there is an option to control that. fixes #37

includes/admin/class-powered-cache-admin-actions.php

@@ -13,7 +13,7 @@ class Powered_Cache_Admin_Actions {
 	 * @since 1.0
 	 */
 	public static function update_settings() {
-		global $powered_cache_options, $powered_cache_fs;
+		global $powered_cache_options, $powered_cache_fs, $is_apache;;
 
 
 		if ( ! defined( 'POWERED_CACHE_SAVING_OPTIONS' ) ) {
@@ -33,13 +33,20 @@ public static function update_settings() {
 			case 'basic-options':
 			default:
 				$new_options['enable_page_caching']        = ( isset( $_post['enable_page_caching'] ) && 1 == $_post['enable_page_caching'] ? true : false );
+				$new_options['configure_htaccess']         = ( isset( $_post['configure_htaccess'] ) && 1 == $_post['configure_htaccess'] ? true : false );
 				$new_options['object_cache']               = ( isset( $_post['object_cache'] ) ? sanitize_text_field( $_post['object_cache'] ) : 'off' );
 				$new_options['cache_mobile']               = ( isset( $_post['cache_mobile'] ) && 1 == $_post['cache_mobile'] ? true : false );
-				$new_options['cache_mobile_separate_file'] = ( ( isset( $_post['cache_mobile'] ) && 1 == $_post['cache_mobile'] ) && ( isset( $_post['cache_mobile_separate_file'] ) && 1 == $_post['cache_mobile_separate_file'] ) ? true : false );
+				$new_options['cache_mobile_separate_file'] = ( true === $new_options['cache_mobile'] && ( isset( $_post['cache_mobile_separate_file'] ) && 1 == $_post['cache_mobile_separate_file'] ) ? true : false );
 				$new_options['loggedin_user_cache']        = ( isset( $_post['loggedin_user_cache'] ) && 1 == $_post['loggedin_user_cache'] ? true : false );
 				$new_options['ssl_cache']                  = ( isset( $_post['ssl_cache'] ) && 1 == $_post['ssl_cache'] ? true : false );
 				$new_options['gzip_compression']           = ( isset( $_post['gzip_compression'] ) && 1 == $_post['gzip_compression'] ? true : false );
 
+
+				// this option only valid on apache
+				if ( ! $is_apache ) {
+					unset( $new_options['configure_htaccess'] );
+				}
+
 				/**
 				 * Calculate timeout with given interval, saving as minutes.
 				 *

includes/admin/settings/basic-options.php

@@ -27,6 +27,12 @@
 							<?php _e( 'Enable page caching that will reduce the response time of your site.', 'powered-cache' ); ?>
 							(<a target="_blank" href="http://docs.poweredcache.com/article/4-page-cache">?</a>)
 						</label>
+						<?php global $is_apache;
+						if ( $is_apache && ( ( is_multisite() && current_user_can( 'manage_network' ) ) || current_user_can( 'activate_plugins' ) ) ): ?>
+							<div id="configure-htaccess-option">
+								<label><input type="checkbox" id="cache_configure_htaccess" name="powered_cache_settings[configure_htaccess]" <?php checked( powered_cache_get_option( 'configure_htaccess' ), 1 ); ?> value="1"><?php _e( 'Configure <code>.htaccess</code> file automatically.', 'powered-cache' ); ?></label>
+							</div>
+						<?php endif; ?>
 					</td>
 				</tr>
 

includes/class-powered-cache-config.php

@@ -58,6 +58,7 @@ public function default_settings() {
 		$settings = array(
 			// basic options
 			'enable_page_caching'        => false,
+			'configure_htaccess'         => true,
 			'object_cache'               => 'off',
 			'cache_mobile'               => true,
 			'cache_mobile_separate_file' => false,
@@ -412,6 +413,17 @@ public function configure_htaccess( $enable = true ) {
 			return false;
 		}
 
+		/**
+		 * Apache users can control automatic configuration
+		 *
+		 * @since 1.2
+		 */
+		$automatic_configuration = powered_cache_get_option( 'configure_htaccess' );
+
+		if ( ! $automatic_configuration ) {
+			return false;
+		}
+
 		if ( $powered_cache_fs->is_writable( $htaccess_file ) ) {
 			$contents = $powered_cache_fs->get_contents( $htaccess_file );