From 665b8afcbf7eae4f19ae90beb5cdeb97fefecaff Mon Sep 17 00:00:00 2001
From: Arman Ozak <arman@armanozak.com>
Date: Wed, 5 Aug 2020 15:37:26 +0300
Subject: [PATCH] feat: add createTokenParser string util

---
 .../core/src/lib/tests/string-utils.spec.ts   | 22 +++++++++++++++++++
 .../packages/core/src/lib/utils/index.ts      |  3 ++-
 .../core/src/lib/utils/string-utils.ts        | 17 ++++++++++++++
 3 files changed, 41 insertions(+), 1 deletion(-)
 create mode 100644 npm/ng-packs/packages/core/src/lib/tests/string-utils.spec.ts
 create mode 100644 npm/ng-packs/packages/core/src/lib/utils/string-utils.ts

diff --git a/npm/ng-packs/packages/core/src/lib/tests/string-utils.spec.ts b/npm/ng-packs/packages/core/src/lib/tests/string-utils.spec.ts
new file mode 100644
index 0000000000..a0642e43ee
--- /dev/null
+++ b/npm/ng-packs/packages/core/src/lib/tests/string-utils.spec.ts
@@ -0,0 +1,22 @@
+import { createTokenParser } from '../utils/string-utils';
+
+describe('String Utils', () => {
+  describe('#createTokenParser', () => {
+    const parseTokens = createTokenParser('{subDomain}.{domain}.{gtld}|{domain}.{gtld}');
+
+    test.each`
+      url                       | subDomain     | domain       | gtld
+      ${'www.example.com'}      | ${'www'}      | ${'example'} | ${'com'}
+      ${'test.sub.example.com'} | ${'test.sub'} | ${'example'} | ${'com'}
+      ${'example.com'}          | ${undefined}  | ${'example'} | ${'com'}
+    `(
+      'should return subDomain as $subDomain, domain as $domain, and gtld as $gtld when url is $url',
+      ({ url, subDomain, domain, gtld }) => {
+        const parsed = parseTokens(url);
+        expect(parsed.subDomain[0]).toBe(subDomain);
+        expect(parsed.domain[0]).toBe(domain);
+        expect(parsed.gtld[0]).toBe(gtld);
+      },
+    );
+  });
+});
diff --git a/npm/ng-packs/packages/core/src/lib/utils/index.ts b/npm/ng-packs/packages/core/src/lib/utils/index.ts
index b31c0320f1..9949fa9f26 100644
--- a/npm/ng-packs/packages/core/src/lib/utils/index.ts
+++ b/npm/ng-packs/packages/core/src/lib/utils/index.ts
@@ -6,8 +6,9 @@ export * from './generator-utils';
 export * from './initial-utils';
 export * from './lazy-load-utils';
 export * from './localization-utils';
+export * from './multi-tenancy-utils';
 export * from './number-utils';
 export * from './route-utils';
 export * from './rxjs-utils';
-export * from './multi-tenancy-utils';
+export * from './string-utils';
 export * from './tree-utils';
diff --git a/npm/ng-packs/packages/core/src/lib/utils/string-utils.ts b/npm/ng-packs/packages/core/src/lib/utils/string-utils.ts
new file mode 100644
index 0000000000..00db697325
--- /dev/null
+++ b/npm/ng-packs/packages/core/src/lib/utils/string-utils.ts
@@ -0,0 +1,17 @@
+export function createTokenParser(format: string) {
+  return (string: string) => {
+    const tokens: string[] = [];
+    const regex = format.replace(/\./g, '\\.').replace(/\{\s?([0-9a-zA-Z]+)\s?\}/g, (_, token) => {
+      tokens.push(token);
+      return '(.+)';
+    });
+
+    const matches = (string.match(regex) || []).slice(1);
+
+    return matches.reduce((acc, v, i) => {
+      const key = tokens[i];
+      acc[key] = [...(acc[key] || []), v].filter(Boolean);
+      return acc;
+    }, {} as Record<string, string[]>);
+  };
+}