feat: custom transformer composable

docs/.vitepress/transformer/core.ts

@@ -0,0 +1,53 @@
+import consola from 'consola'
+
+type Transform = {
+  name: string
+  find: string | RegExp
+  replace: string | ((match: string) => string)
+}
+
+type TransformerFunc = (name: string, transforms: Transform[]) => Replacer
+
+interface Replacer {
+  transform: TransformerFunc
+  getText(): string
+}
+
+export const transformer = (text: string) => {
+  const handler: ProxyHandler<{ text: string }> = {
+    get(target, prop) {
+      if (prop === 'transform') {
+        return (name: string, transforms: Transform[]): Replacer => {
+          consola.debug(`Starting transform ${name} with ${transforms}`)
+
+          transforms.forEach(({ name, find, replace }) => {
+            consola.debug(`Transforming ${name} with ${find}`)
+            target.text = target.text.replace(find, replace as any)
+          })
+
+          // @ts-expect-error - Proxy is not typed
+          return proxy
+        }
+      }
+      if (prop === 'getText') {
+        return () => target.text
+      }
+      return Reflect.get(target, prop)
+    }
+  }
+
+  const target = { text }
+  const proxy = new Proxy(target, handler)
+  return proxy as unknown as Replacer
+}
+
+export function replaceUnderscore(text: string): string {
+  const pattern = /\/#[\w\-]+(?:_[\w]+)*/g
+  const matches = text.match(pattern) || []
+  let _text = text
+  for (const match of matches) {
+    const replacement = match.replace(/_/g, '-')
+    _text = _text.replace(match, replacement)
+  }
+  return _text
+}