From d93233852f345930275d68197de14e89891b66ed Mon Sep 17 00:00:00 2001
From: Shinigami <chrissi92@hotmail.de>
Date: Thu, 18 Apr 2024 08:56:40 +0200
Subject: [PATCH] refactor(deps): inline decamelize dependency (#1099)

---
 package.json                  |  1 -
 pnpm-lock.yaml                |  9 ---------
 src/utils/createSchemalize.ts |  5 +++--
 src/utils/decamelize.ts       | 36 +++++++++++++++++++++++++++++++++++
 src/utils/index.ts            |  1 +
 test/utils/decamelize.spec.ts | 30 +++++++++++++++++++++++++++++
 6 files changed, 70 insertions(+), 12 deletions(-)
 create mode 100644 src/utils/decamelize.ts
 create mode 100644 test/utils/decamelize.spec.ts

diff --git a/package.json b/package.json
index 4a02a478..7c26d990 100644
--- a/package.json
+++ b/package.json
@@ -95,7 +95,6 @@
     "url": "https://github.com/salsita/node-pg-migrate.git"
   },
   "dependencies": {
-    "decamelize": "^5.0.0",
     "mkdirp": "~1.0.0",
     "yargs": "~17.7.0"
   },
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index dfe13d50..c1e996de 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -13,9 +13,6 @@ importers:
 
   .:
     dependencies:
-      decamelize:
-        specifier: ^5.0.0
-        version: 5.0.1
       mkdirp:
         specifier: ~1.0.0
         version: 1.0.4
@@ -1015,10 +1012,6 @@ packages:
     resolution: {integrity: sha512-z2S+W9X73hAUUki+N+9Za2lBlun89zigOyGrsax+KUQ6wKW4ZoWpEYBkGhQjwAjjDCkWxhY0VKEhk8wzY7F5cA==}
     engines: {node: '>=0.10.0'}
 
-  decamelize@5.0.1:
-    resolution: {integrity: sha512-VfxadyCECXgQlkoEAjeghAr5gY3Hf+IKjKb+X8tGVDtveCjN+USwprd2q3QXBR9T1+x2DG0XZF5/w+7HAtSaXA==}
-    engines: {node: '>=10'}
-
   decompress-response@3.3.0:
     resolution: {integrity: sha512-BzRPQuY1ip+qDonAOz42gRm/pg9F768C+npV/4JOsxRC2sq+Rlk+Q4ZCAsOhnIaMrgarILY+RMUIvMmmX1qAEA==}
     engines: {node: '>=4'}
@@ -3638,8 +3631,6 @@ snapshots:
 
   decamelize@1.2.0: {}
 
-  decamelize@5.0.1: {}
-
   decompress-response@3.3.0:
     dependencies:
       mimic-response: 1.0.1
diff --git a/src/utils/createSchemalize.ts b/src/utils/createSchemalize.ts
index 3aa725aa..6fd8884b 100644
--- a/src/utils/createSchemalize.ts
+++ b/src/utils/createSchemalize.ts
@@ -1,6 +1,7 @@
-import decamelize from 'decamelize';
-import { identity, quote } from '.';
 import type { Name } from '../operations/generalTypes';
+import { decamelize } from './decamelize';
+import { identity } from './identity';
+import { quote } from './quote';
 
 /** @deprecated Use createSchemalize(options) instead. */
 export function createSchemalize(
diff --git a/src/utils/decamelize.ts b/src/utils/decamelize.ts
new file mode 100644
index 00000000..043d6bb8
--- /dev/null
+++ b/src/utils/decamelize.ts
@@ -0,0 +1,36 @@
+// Simplified copy of https://github.com/sindresorhus/decamelize/blob/5deb8c5b88c3dbc93ef0d68faa0fc45cf98cad9d/index.js
+const REPLACEMENT = '$1_$2';
+
+/**
+ * Convert a string into a decamelize lowercased one.
+ *
+ * @example
+ * unicornsAndRainbows → unicorns_and_rainbows
+ * myURLString → my_url_string
+ *
+ * @param text The string to decamelize.
+ * @returns The decamelized string.
+ */
+export function decamelize(text: string): string {
+  // Checking the second character is done later on. Therefore process shorter strings here.
+  if (text.length < 2) {
+    return text.toLowerCase();
+  }
+
+  // Split lowercase sequences followed by uppercase character.
+  // `dataForUSACounties` → `data_For_USACounties`
+  // `myURLstring → `my_URLstring`
+  const decamelized = text.replace(
+    /([\p{Lowercase_Letter}\d])(\p{Uppercase_Letter})/gu,
+    REPLACEMENT
+  );
+
+  // Split multiple uppercase characters followed by one or more lowercase characters.
+  // `my_URLstring` → `my_ur_lstring`
+  return decamelized
+    .replace(
+      /(\p{Uppercase_Letter})(\p{Uppercase_Letter}\p{Lowercase_Letter}+)/gu,
+      REPLACEMENT
+    )
+    .toLowerCase();
+}
diff --git a/src/utils/index.ts b/src/utils/index.ts
index c9a9b95d..2b285922 100644
--- a/src/utils/index.ts
+++ b/src/utils/index.ts
@@ -1,5 +1,6 @@
 export { createSchemalize } from './createSchemalize';
 export { createTransformer } from './createTransformer';
+export { decamelize } from './decamelize';
 export { escapeValue } from './escapeValue';
 export { formatLines } from './formatLines';
 export { formatParams } from './formatParams';
diff --git a/test/utils/decamelize.spec.ts b/test/utils/decamelize.spec.ts
new file mode 100644
index 00000000..0f8f9aa2
--- /dev/null
+++ b/test/utils/decamelize.spec.ts
@@ -0,0 +1,30 @@
+import { describe, expect, it } from 'vitest';
+import { decamelize } from '../../src/utils';
+
+describe('utils', () => {
+  describe('decamelize', () => {
+    it.each([
+      ['', ''],
+      ['A', 'a'],
+      ['A B', 'a b'],
+      ['a2b', 'a2b'],
+      ['A2B', 'a2_b'],
+      ['_A2B', '_a2_b'],
+      ['myURLstring', 'my_ur_lstring'],
+      ['unicornsAndRainbows', 'unicorns_and_rainbows'],
+      ['UNICORNS AND RAINBOWS', 'unicorns and rainbows'],
+      ['unicorns-and-rainbows', 'unicorns-and-rainbows'],
+      ['thisIsATest', 'this_is_a_test'],
+      ['myURLString', 'my_url_string'],
+      ['URLString', 'url_string'],
+      ['StringURL', 'string_url'],
+      ['testGUILabel', 'test_gui_label'],
+      ['CAPLOCKED1', 'caplocked1'],
+      ['my_URL_string', 'my_url_string'],
+    ])('should handle string %s', (input, expected) => {
+      const actual = decamelize(input);
+
+      expect(actual).toBe(expected);
+    });
+  });
+});