Add RegExp string filtering capabilities (#362)

CHANGELOG.md

@@ -3,6 +3,7 @@
 ## Not released
 
 - Implement multiple operationColumn in core functions [#347](https://github.com/CartoDB/carto-react/pull/347)
+- Add RegExp string filtering capabilities [#362](https://github.com/CartoDB/carto-react/pull/362)
 
 ## 1.2
 

packages/react-core/__tests__/filters/FilterTypes.test.js

@@ -91,6 +91,11 @@ describe('FilterTypes', () => {
 
       // Multiples filter values (OR)
       expect(stringSearchFilter(['_test_', 'carto'], featureValue)).toBe(true);
+
+      // Regexp filtering
+      expect(stringSearchFilter(['\\w+RT\\w'], featureValue, { useRegExp: true })).toBe(
+        true
+      );
     });
   });
 });

packages/react-core/src/filters/FilterTypes.js

@@ -48,18 +48,18 @@ function closedOpen(filterValues, featureValue) {
 // FilterTypes.STRING_SEARCH
 function stringSearch(filterValues, featureValue, params = {}) {
   const normalizedFeatureValue = normalize(featureValue, params);
-  const stringRegExp = filterValues
-    .map((filterValue) => {
-      let stringRegExp = escapeRegExp(normalize(filterValue, params));
+  const stringRegExp = params.useRegExp
+    ? filterValues
+    : filterValues.map((filterValue) => {
+        let stringRegExp = escapeRegExp(normalize(filterValue, params));
 
-      if (params.mustStart) stringRegExp = `^${stringRegExp}`;
-      if (params.mustEnd) stringRegExp = `${stringRegExp}$`;
+        if (params.mustStart) stringRegExp = `^${stringRegExp}`;
+        if (params.mustEnd) stringRegExp = `${stringRegExp}$`;
 
-      return stringRegExp;
-    })
-    .join('|');
+        return stringRegExp;
+      });
 
-  const regex = new RegExp(stringRegExp, 'g');
+  const regex = new RegExp(stringRegExp.join('|'), params.caseSensitive ? 'g' : 'gi');
   return !!normalizedFeatureValue.match(regex);
 }
 
@@ -72,9 +72,7 @@ function escapeRegExp(value) {
 }
 
 function normalize(data, params) {
-  let normalizedData = '' + data;
-
-  if (!params.caseSensitive) normalizedData = normalizedData.toLocaleLowerCase();
+  let normalizedData = String(data);
   if (!params.keepSpecialCharacters)
     normalizedData = normalizedData.normalize('NFD').replace(normalizeRegExp, '');