refactor: dedupe shared helpers

scripts/check-docs-mdx.mjs

@@ -3,6 +3,10 @@
 import fs from "node:fs";
 import path from "node:path";
 import { compile } from "@mdx-js/mdx";
+import {
+  checkMintlifyAccordionIndentation,
+  MINTLIFY_ACCORDION_INDENT_MESSAGE,
+} from "./lib/mintlify-accordion.mjs";
 
 const MINTLIFY_LANGUAGE_CODES = new Set([
   "en",
@@ -120,59 +124,13 @@ function formatMdxError(filePath, error) {
 }
 
 function checkMintlifyMdxStructure(filePath, raw) {
-  const errors = [];
-  const lines = stripFrontmatter(raw).split(/\r?\n/u);
-  const accordionStack = [];
-  let inCodeFence = false;
-
-  for (let index = 0; index < lines.length; index += 1) {
-    const line = lines[index];
-    if (/^\s*(```|~~~)/u.test(line)) {
-      inCodeFence = !inCodeFence;
-      continue;
-    }
-    if (inCodeFence) {
-      continue;
-    }
-
-    const openAccordion = line.match(/^(\s*)<Accordion\b/u);
-    if (openAccordion) {
-      accordionStack.push({
-        indent: openAccordion[1].length,
-        line: index + 1,
-        hasOutdentedListItem: false,
-      });
-      continue;
-    }
-
-    const listItem = line.match(/^(\s*)[-*+]\s+/u);
-    if (listItem) {
-      for (const accordion of accordionStack) {
-        if (listItem[1].length < accordion.indent) {
-          accordion.hasOutdentedListItem = true;
-        }
-      }
-    }
-
-    const closeAccordion = line.match(/^(\s*)<\/Accordion>/u);
-    if (!closeAccordion) {
-      continue;
-    }
-
-    const opening = accordionStack.pop();
-    if (opening && opening.hasOutdentedListItem && closeAccordion[1].length > opening.indent) {
-      errors.push({
-        type: "mintlify-mdx",
-        file: filePath,
-        line: index + 1,
-        column: closeAccordion[1].length + 1,
-        message:
-          "Accordion closing tag is indented deeper than its opening tag; Mintlify can parse following markdown as nested content.",
-      });
-    }
-  }
-
-  return errors;
+  return checkMintlifyAccordionIndentation(stripFrontmatter(raw)).map((error) => ({
+    type: "mintlify-mdx",
+    file: filePath,
+    line: error.line,
+    column: error.column,
+    message: MINTLIFY_ACCORDION_INDENT_MESSAGE,
+  }));
 }
 
 async function checkMdxFile(filePath) {