fix: working on ast instead of string for script tag (#24)

src/extract-i18n-keys.ts

@@ -5,9 +5,10 @@ import _ from 'lodash';
 import fs from 'node:fs/promises';
 import path from 'node:path';
 import { walk } from 'estree-walker';
-import { extractKeyPathFromFile, stripScriptTag } from './string-utils.js';
+import { extractKeyPathFromFile } from './string-utils.js';
 import { scanDir } from './utils.js';
 import { preprocess, PreprocessorGroup, parse } from 'svelte/compiler';
+import printAst from '@vardario/svelte-ast-printer';
 
 function extractI18nKeys(root: any, callIdentifier: string): string[] {
   const result: string[] = [];
@@ -49,15 +50,17 @@ export async function processSvelteFile(
   const preprocessExtract = (): PreprocessorGroup => {
     return {
       async markup({ content, filename }) {
-        const { code } = stripScriptTag(rawCode);
-        const ast = parse(code, { modern: true });
+        const ast = parse(content, { modern: true });
         keys.push(...extractI18nKeys(ast.fragment, callIdentifier));
-        return { code: content };
-      },
-      async script({ content, filename }) {
-        const ast = acorn.parse(content, { ecmaVersion: 'latest', sourceType: 'module' }) as Node;
-        keys.push(...extractI18nKeys(ast, callIdentifier));
-        return { code: content };
+        if (ast.instance) {
+          keys.push(...extractI18nKeys(ast.instance.content, callIdentifier));
+        }
+
+        if (ast.module) {
+          keys.push(...extractI18nKeys(ast.module.content, callIdentifier));
+        }
+
+        return { code: printAst(ast) };
       }
     };
   };

src/i18n-preprocessor.ts

@@ -1,9 +1,10 @@
-import printHtml, { PrinterIdentOptions } from '@vardario/svelte-ast-printer';
+import { PrinterIdentOptions } from '@vardario/svelte-ast-printer';
 import { parse as scriptParse } from 'acorn';
 import { CallExpression, Node } from 'estree';
 import { walk } from 'estree-walker';
-import { addPrefixToI18nArgument, extractKeyPathFromFile, stripScriptTag } from './string-utils.js';
+import { extractKeyPathFromFile } from './string-utils.js';
 import { AST, type PreprocessorGroup, parse as svelteParse } from 'svelte/compiler';
+import printAst from '@vardario/svelte-ast-printer';
 
 export function create18nCallLabelAttribute(callIdentifier: string, i18nKey: string) {
   const expression = scriptParse(`${callIdentifier}("${i18nKey}")`, { ecmaVersion: 'latest' });
@@ -114,16 +115,12 @@ export const i18nProcessor = (options?: I18nProcessorOptions): PreprocessorGroup
   return {
     async markup({ content, filename }) {
       return preprocess(content, filename, async () => {
-        const { code, scriptTags } = stripScriptTag(content);
-        const root = svelteParse(code, { modern: true });
+        const root = svelteParse(content, { modern: true });
         const keyPath = extractKeyPathFromFile(filename!);
 
         adjustI18nKeys(root, keyPath, callIdentifier);
 
-        const processedScriptTags = scriptTags.map(tag => addPrefixToI18nArgument(tag, keyPath));
-        const transformedCode = printHtml(root, options?.indent);
-        const result = `${processedScriptTags.join('\n')}${processedScriptTags.length ? '\n' : ''}${transformedCode}`;
-        return { code: result };
+        return { code: printAst(root, options?.indent) };
       });
     }
   };

src/string-utils.ts

@@ -1,16 +1,5 @@
 import path from 'node:path';
 
-export function stripScriptTag(code: string) {
-  const scriptTagRegEx = /(<script[\s\S]*?[\s\S\]*?>[\s\S]*?<\/script>)/gi;
-  const scriptTags: string[] = [];
-
-  for (const match of code.matchAll(scriptTagRegEx)) {
-    scriptTags.push(match[0]);
-  }
-
-  return { code: code.replace(scriptTagRegEx, ''), scriptTags };
-}
-
 export function extractKeyPathFromFile(filename: string) {
   filename = filename.split('.').slice(0, -1).join('.');
   const regEx = /(components|routes)/;

src/tests/string-utils.test.ts

@@ -1,6 +1,6 @@
 import path from 'node:path';
 import { describe, expect, test } from 'vitest';
-import { addPrefixToI18nArgument, extractKeyPathFromFile, stripScriptTag } from '../string-utils.js';
+import { addPrefixToI18nArgument, extractKeyPathFromFile } from '../string-utils.js';
 import { __dirname } from '../utils.js';
 
 describe('string-utils', () => {
@@ -17,24 +17,6 @@ describe('string-utils', () => {
     );
   });
 
-  test('stripScriptTag', () => {
-    const result0 = stripScriptTag('<script lang="ts">let a;</script><main/>');
-    const result1 = stripScriptTag('<script>let a;</script><main/>');
-    const result2 = stripScriptTag('<script lang="ts">let a;</script><script context="module">let a;</script><main/>');
-
-    expect(result0.code).toBe('<main/>');
-    expect(result0.scriptTags).toStrictEqual(['<script lang="ts">let a;</script>']);
-
-    expect(result1.code).toBe('<main/>');
-    expect(result1.scriptTags).toStrictEqual(['<script>let a;</script>']);
-
-    expect(result2.code).toBe('<main/>');
-    expect(result2.scriptTags).toStrictEqual([
-      '<script lang="ts">let a;</script>',
-      '<script context="module">let a;</script>'
-    ]);
-  });
-
   test('addPrefixToI18nArgument', () => {
     expect(addPrefixToI18nArgument("const a = $i18n('key')", 'prefix')).toBe("const a = $i18n('prefix.key')");
     expect(addPrefixToI18nArgument("const a = $i18n('key', { count: 1 })", 'prefix')).toBe(