Support contains queries in overview page.

src/lib/query.ts

@@ -1,6 +1,13 @@
 import { NextApiRequest } from 'next';
 import { getAllowedUnits, getMinimumUnit } from './date';
 import { getWebsiteDateRange } from '../queries';
+import { FILTER_COLUMNS, OPERATORS } from 'lib/constants';
+
+const OPERATOR_SYMBOLS = {
+  '!': 'neq',
+  '~': 'c',
+  '!~': 'dnc',
+};
 
 export async function parseDateRangeQuery(req: NextApiRequest) {
   const { websiteId, startAt, endAt, unit } = req.query;
@@ -29,3 +36,28 @@ export async function parseDateRangeQuery(req: NextApiRequest) {
     unit: (getAllowedUnits(startDate, endDate).includes(unit as string) ? unit : minUnit) as string,
   };
 }
+
+export function getQueryFilters(req: NextApiRequest) {
+  return Object.keys(FILTER_COLUMNS).reduce((obj, key) => {
+    const value = req.query[key];
+
+    if (value) {
+      obj[key] = value;
+    }
+
+    if (typeof value === 'string') {
+      const [, prefix, paramValue] = value.match(/^(!~|!|~)?(.*)$/);
+
+      if (prefix && paramValue) {
+        obj[key] = {
+          name: key,
+          column: FILTER_COLUMNS[key],
+          operator: OPERATOR_SYMBOLS[prefix] || OPERATORS.equals,
+          value: paramValue,
+        };
+      }
+    }
+
+    return obj;
+  }, {});
+}