From edd276e59b13241a886cb3de517aa8d3f8557d18 Mon Sep 17 00:00:00 2001
From: francoismassart <francois.massart@gmail.com>
Date: Fri, 11 Jul 2025 14:47:05 +0200
Subject: [PATCH] feat: is valid class name worker

---
 src/util/tailwindcss-api/index.ts             |  6 +++
 .../worker/get-sorted-class-names.spec.ts     | 12 +++---
 .../worker/is-valid-class-name.mjs            | 40 +++++++++++++++++++
 .../worker/is-valid-class-name.spec.ts        | 22 ++++++++++
 4 files changed, 74 insertions(+), 6 deletions(-)
 create mode 100644 src/util/tailwindcss-api/worker/is-valid-class-name.mjs
 create mode 100644 src/util/tailwindcss-api/worker/is-valid-class-name.spec.ts

diff --git a/src/util/tailwindcss-api/index.ts b/src/util/tailwindcss-api/index.ts
index 7e63951..bb39819 100644
--- a/src/util/tailwindcss-api/index.ts
+++ b/src/util/tailwindcss-api/index.ts
@@ -11,3 +11,9 @@ export const getSortedClassNamesWorker: (
 ) => Array<string> = createSyncFn(
   require.resolve("./worker/get-sorted-class-names.mjs")
 );
+export const isValidClassNameWorker: (
+  cssConfigPath: string,
+  className: string
+) => boolean = createSyncFn(
+  require.resolve("./worker/is-valid-class-name.mjs")
+);
diff --git a/src/util/tailwindcss-api/worker/get-sorted-class-names.spec.ts b/src/util/tailwindcss-api/worker/get-sorted-class-names.spec.ts
index 2d6b722..ee7ce34 100644
--- a/src/util/tailwindcss-api/worker/get-sorted-class-names.spec.ts
+++ b/src/util/tailwindcss-api/worker/get-sorted-class-names.spec.ts
@@ -8,15 +8,15 @@ test(`Sort classnames based on "normal.css"`, () => {
     "lg:flex",
     "block",
     "top-0",
-    "unkown",
+    "unknown",
     "text-red-100",
   ];
   const sorted = getSortedClassNamesWorker(path, unorderdClassNames);
   // Unknown classnames should be first
-  expect(sorted[0]).toBe("unkown");
+  expect(sorted[0]).toBe("unknown");
   // The rest should be sorted as well
   expect(sorted).toStrictEqual([
-    "unkown",
+    "unknown",
     "top-0",
     "block",
     "text-red-100",
@@ -28,16 +28,16 @@ test(`Sort "tw:" prefixed classnames based on "tiny-prefixed.css"`, () => {
   const path = require.resolve("../../../../tests/stubs/css/tiny-prefixed.css");
   const unorderdClassNames = [
     "tw:flex",
-    "tw:unkown",
+    "tw:unknown",
     "tw:hover:text-tiny",
     "tw:top-0",
   ];
   const sorted = getSortedClassNamesWorker(path, unorderdClassNames);
   // Unknown classnames should be first
-  expect(sorted[0]).toBe("tw:unkown");
+  expect(sorted[0]).toBe("tw:unknown");
   // The rest should be sorted as well
   expect(sorted).toStrictEqual([
-    "tw:unkown",
+    "tw:unknown",
     "tw:top-0",
     "tw:flex",
     "tw:hover:text-tiny",
diff --git a/src/util/tailwindcss-api/worker/is-valid-class-name.mjs b/src/util/tailwindcss-api/worker/is-valid-class-name.mjs
new file mode 100644
index 0000000..dacee2d
--- /dev/null
+++ b/src/util/tailwindcss-api/worker/is-valid-class-name.mjs
@@ -0,0 +1,40 @@
+/**
+ * ⚠️ This is a worker script which is ran in node's `worker_threads`.
+ * 🤓 This means that it is not executed in the main thread, but in a separate thread.
+ * 😅 Because of this, expect some disturbances, like:
+ *   - `console.log` won't work `vitest`... (seems to work with `jest`).
+ *   - You cannot pass complex objects as arguments, only serializable ones.
+ *   - You cannot retun complex objects, only serializable ones.
+ *   - e.g. You cannot return the `utils.context` directly, but you can return some of its properties...
+ *
+ * ℹ️ It uses the `*.mjs` extension to indicate that it is an ES module.
+ * ✅ We still check the syntax with TypeScript, but it is not a TypeScript file.
+ */
+
+// @ts-check
+
+import { runAsWorker } from "synckit";
+import { TailwindUtils } from "tailwind-api-utils";
+
+runAsWorker(
+  async (
+    /**
+     * @type {string} The path to the Tailwind CSS config file
+     */
+    cssConfigPath,
+    /**
+     * @type {string} Class name to validate
+     */
+    className
+  ) => {
+    const utils = new TailwindUtils();
+    await utils.loadConfigV4(cssConfigPath);
+    if (!utils.context) {
+      throw new Error(
+        `Failed to load the Tailwind CSS theme using: "${cssConfigPath}"`
+      );
+    }
+    const sorted = await utils.isValidClassName(className);
+    return sorted;
+  }
+);
diff --git a/src/util/tailwindcss-api/worker/is-valid-class-name.spec.ts b/src/util/tailwindcss-api/worker/is-valid-class-name.spec.ts
new file mode 100644
index 0000000..0ca5cfd
--- /dev/null
+++ b/src/util/tailwindcss-api/worker/is-valid-class-name.spec.ts
@@ -0,0 +1,22 @@
+import { expect, test } from "vitest";
+
+import { isValidClassNameWorker } from "..";
+
+test(`Validate classnames based on "normal.css"`, () => {
+  const path = require.resolve("../../../../tests/stubs/css/normal.css");
+  // Unknown classnames should be invalid
+  expect(isValidClassNameWorker(path, "unknown")).toBe(false);
+  // Known classnames should be valid
+  expect(isValidClassNameWorker(path, "flex")).toBe(true);
+});
+
+test(`Validate "tw:" prefixed classnames based on "tiny-prefixed.css"`, () => {
+  const path = require.resolve("../../../../tests/stubs/css/tiny-prefixed.css");
+  // Unknown classnames should be invalid
+  expect(isValidClassNameWorker(path, "tw:unknown")).toBe(false);
+  // Known classnames should be valid
+  expect(isValidClassNameWorker(path, "tw:flex")).toBe(true);
+  expect(isValidClassNameWorker(path, "tw:border-tiny")).toBe(true);
+  // Unprefixed classnames should be invalid
+  expect(isValidClassNameWorker(path, "flex")).toBe(false);
+});