Filter tag enhancements.

src/lib/params.ts

@@ -0,0 +1,15 @@
+import { OPERATOR_PREFIXES, OPERATORS } from 'lib/constants';
+
+export function parseParameterValue(param: string) {
+  const [, prefix, value] = param.match(/^(!~|!|~)?(.*)$/);
+
+  const operator =
+    Object.keys(OPERATOR_PREFIXES).find(key => OPERATOR_PREFIXES[key] === prefix) ||
+    OPERATORS.equals;
+
+  return { operator, value };
+}
+
+export function operatorEquals(operator: any) {
+  return [OPERATORS.equals, OPERATORS.notEquals].includes(operator);
+}