From 4f7167595ee8aa534a2d6a23dbcb27a8de0125ca Mon Sep 17 00:00:00 2001
From: Arman Ozak <arman@armanozak.com>
Date: Tue, 1 Dec 2020 02:58:09 +0300
Subject: [PATCH] feat: add jsonNetCamelCase as case util

---
 .../extensions/src/lib/utils/case.util.ts     | 37 +++++++++++++++++++
 .../extensions/src/tests/case.util.spec.ts    | 18 +++++++++
 2 files changed, 55 insertions(+)
 create mode 100644 npm/ng-packs/packages/theme-shared/extensions/src/lib/utils/case.util.ts
 create mode 100644 npm/ng-packs/packages/theme-shared/extensions/src/tests/case.util.spec.ts

diff --git a/npm/ng-packs/packages/theme-shared/extensions/src/lib/utils/case.util.ts b/npm/ng-packs/packages/theme-shared/extensions/src/lib/utils/case.util.ts
new file mode 100644
index 0000000000..5833b82de2
--- /dev/null
+++ b/npm/ng-packs/packages/theme-shared/extensions/src/lib/utils/case.util.ts
@@ -0,0 +1,37 @@
+// https://github.com/JamesNK/Newtonsoft.Json/blob/master/Src/Newtonsoft.Json/Utilities/StringUtils.cs#L155
+export function jsonNetCamelCase(str: string) {
+  if (!str || !isUpperCase(str[0])) return str;
+
+  const chars = str.split('');
+  const { length } = chars;
+
+  for (let i = 0; i < length; i++) {
+    if (i === 1 && !isUpperCase(chars[i])) break;
+
+    const hasNext = i + 1 < length;
+
+    if (i > 0 && hasNext && !isUpperCase(chars[i + 1])) {
+      if (isSeparator(chars[i + 1])) {
+        chars[i] = toLowerCase(chars[i]);
+      }
+
+      break;
+    }
+
+    chars[i] = toLowerCase(chars[i]);
+  }
+
+  return chars.join('');
+}
+
+function isSeparator(str = '') {
+  return /[\s\u2000-\u206F\u2E00-\u2E7F\\'!"#$%&()*+,\-.\/:;<=>?@\[\]^_`{|}~]+/.test(str);
+}
+
+function isUpperCase(str = '') {
+  return /[A-Z]+/.test(str);
+}
+
+function toLowerCase(str = '') {
+  return str.toLowerCase();
+}
diff --git a/npm/ng-packs/packages/theme-shared/extensions/src/tests/case.util.spec.ts b/npm/ng-packs/packages/theme-shared/extensions/src/tests/case.util.spec.ts
new file mode 100644
index 0000000000..db9f7b1de8
--- /dev/null
+++ b/npm/ng-packs/packages/theme-shared/extensions/src/tests/case.util.spec.ts
@@ -0,0 +1,18 @@
+import { jsonNetCamelCase } from '../lib/utils/case.util';
+
+describe('Case Utils', () => {
+  describe('#jsonNetCamelCase', () => {
+    test.each`
+      input                 | output
+      ${'Primary'}          | ${'primary'}
+      ${'PrimaryRole'}      | ${'primaryRole'}
+      ${'Primary Role'}     | ${'primary Role'}
+      ${'PrimaryRole_Text'} | ${'primaryRole_Text'}
+      ${'ISBN'}             | ${'isbn'}
+      ${''}                 | ${''}
+      ${'iMDB'}             | ${'iMDB'}
+    `('should return $output when input is $input', ({ input, output }) => {
+      expect(jsonNetCamelCase(input)).toBe(output);
+    });
+  });
+});