fix: the mess with escape and unescaping

includes/admin/feedzy-rss-feeds-import.php

@@ -565,6 +565,10 @@ public function save_feedzy_import_feed_meta( $post_id, $post ) {
 			$data_meta['import_auto_translation'] = isset( $data_meta['import_auto_translation'] ) ? $data_meta['import_auto_translation'] : 'no';
 			// Check feeds external image URL checkbox checked OR not.
 			$data_meta['import_use_external_image'] = isset( $data_meta['import_use_external_image'] ) ? $data_meta['import_use_external_image'] : 'no';
+			// If it is filter_conditions we want to escape it.
+			if ( isset( $data_meta['filter_conditions'] ) ) {
+				$data_meta['filter_conditions'] = wp_slash( $data_meta['filter_conditions'] );
+			}
 
 			// $data_meta['feedzy_post_author'] should be the author username. We convert it to the author ID.
 			if ( ! empty( $data_meta['import_post_author'] ) ) {

includes/util/feedzy-rss-feeds-conditions.php

@@ -219,11 +219,10 @@ public function is_condition_met( $condition, $value ): bool {
 				}
 				break;
 			case self::OPERATOR_REGEX:
-				$regex_pattern = $condition_value;
 				if ( ! preg_match( '/^\/.*\/[imsxuADU]*$/', $condition_value ) ) {
-					$regex_pattern = '/' . $condition_value . '/i';
+					$condition_value = '/' . $condition_value . '/i';
 				}
-				return preg_match( $regex_pattern, $value ) === 1;
+				return preg_match( $condition_value, $value ) === 1;
 			default:
 				// Default is self::OPERATOR_HAS_VALUE
 				return ! empty( $value );

js/Conditions/index.js

@@ -36,27 +36,11 @@ const App = () => {
 		const field = document.getElementById('feed-post-filters-conditions');
 		if (field && field.value) {
 			const parsedConditions = JSON.parse(field.value);
-			if (parsedConditions && parsedConditions.conditions) {
-				parsedConditions.conditions = parsedConditions.conditions.map(
-					(condition) => {
-						// We do all these schananigans to make sure we JS doesn't confuse regex for special characters.
-						if (typeof condition.value === 'string') {
-							condition.value = condition.value
-								.replace(/\u0008/g, '\\b')
-								.replace(/\u000C/g, '\\f')
-								.replace(/\n/g, '\\n')
-								.replace(/\r/g, '\\r')
-								.replace(/\t/g, '\\t');
-						}
-						return condition;
-					}
-				);
-				setConditions(parsedConditions);
-			} else {
-				setConditions({ conditions: [], match: 'all' });
-			}
-		} else {
-			setConditions({ conditions: [], match: 'all' });
+			setConditions(
+				parsedConditions && parsedConditions.conditions
+					? parsedConditions
+					: { conditions: [], match: 'all' }
+			);
 		}
 	}, []);
 

tests/test-conditions.php

@@ -145,5 +145,12 @@ public function test_is_condition_met_regex() {
             'value'    => '/test/',
         );
         $this->assertTrue( $this->conditions->is_condition_met( $condition, 'this is a test' ) );
+
+
+        $condition = array(
+            'operator' => 'regex',
+            'value'    => '\band\b',
+        );
+        $this->assertTrue( $this->conditions->is_condition_met( $condition, 'matt and tommy' ) );
     }
 }