From af2778076322b14dec6f1164b651beb557994ef4 Mon Sep 17 00:00:00 2001
From: "Lin, Hung-Shin" <wancat@wancat.cc>
Date: Wed, 25 Oct 2023 13:34:10 +0800
Subject: [PATCH] feat: buildFileCheckCmd

---
 packages/utils/commands.js      | 16 ++++++++++++++
 packages/utils/commands.test.js | 38 +++++++++++++++++++++++++++++++++
 packages/utils/index.js         |  1 +
 3 files changed, 55 insertions(+)
 create mode 100644 packages/utils/commands.js
 create mode 100644 packages/utils/commands.test.js

diff --git a/packages/utils/commands.js b/packages/utils/commands.js
new file mode 100644
index 0000000..45c6a9a
--- /dev/null
+++ b/packages/utils/commands.js
@@ -0,0 +1,16 @@
+const fileTypes = {
+  file: '-f',
+  folder: '-d',
+  link: '-L',
+  socket: '-S',
+}
+
+// eslint-disable-next-line import/prefer-default-export
+export function buildFileCheckCmd(files) {
+  return files
+    .map(
+      ({ path, type, exists }) =>
+        `${exists ? '' : '! '}test ${fileTypes[type] || '-e'} ${path}`
+    )
+    .join(' && ')
+}
diff --git a/packages/utils/commands.test.js b/packages/utils/commands.test.js
new file mode 100644
index 0000000..25c81a6
--- /dev/null
+++ b/packages/utils/commands.test.js
@@ -0,0 +1,38 @@
+import { buildFileCheckCmd } from './commands.js'
+
+describe('buildFileCheckCmd function', () => {
+  it('builds the file check command correctly', () => {
+    const testcases = [
+      {
+        input: [{ path: '/etc/passwd', type: 'file', exists: true }],
+        output: 'test -f /etc/passwd',
+      },
+      {
+        input: [{ path: '/etc', type: 'folder', exists: false }],
+        output: '! test -d /etc',
+      },
+      {
+        input: [
+          { path: '/etc/passwd', type: 'file', exists: true },
+          { path: '/etc', type: 'folder', exists: false },
+        ],
+        output: 'test -f /etc/passwd && ! test -d /etc',
+      },
+      {
+        input: [
+          { path: '/tmp/socket', type: 'socket', exists: true },
+          { path: '/tmp/link', type: 'link', exists: false },
+        ],
+        output: 'test -S /tmp/socket && ! test -L /tmp/link',
+      },
+      {
+        input: [{ path: '/unknown', type: 'unknown', exists: true }],
+        output: 'test -e /unknown',
+      },
+    ]
+
+    testcases.forEach(({ input, output }) => {
+      expect(buildFileCheckCmd(input)).toBe(output)
+    })
+  })
+})
diff --git a/packages/utils/index.js b/packages/utils/index.js
index ab747e8..8d79493 100644
--- a/packages/utils/index.js
+++ b/packages/utils/index.js
@@ -1 +1,2 @@
 export { isValidEmail, isValidUsername } from './auth.js'
+export { buildFileCheckCmd } from './commands.js'