> ## Documentation Index
> Fetch the complete documentation index at: https://docs.fetchski-attract.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Check a document before importing it

> Runs the import’s checks without saving or fetching anything.

```ts TypeScript wrap theme={"dark"}
import { createSiteClient } from '@fetchski/attract-cms-sdk';

const site = createSiteClient();
const blogValidateResult = await site.blogPosts().validateBlogImport({ markdown: 'Example markdown' });
```

```json 200 wrap theme={"dark"}
{
  "valid": false,
  "errors": [
    {
      "message": "Front matter must include a \"title\"."
    }
  ]
}
```

## In your app

A function makes the call on the client it is given, so your code passes the real one and a test passes a fake.

**1. Add the function**

```ts src/attract/validate-blog-import.ts theme={"dark"}
import type { SiteClient } from '@fetchski/attract-cms-sdk';

export async function validateBlogImport(site: SiteClient) {
  return site.blogPosts().validateBlogImport({ markdown: 'Example markdown' });
}
```

The other values are the example’s: take yours from the request, a form or your database.

**2. Call it**

A script makes the client once and calls the function:

```ts scripts/validate-blog-import.ts theme={"dark"}
import { createSiteClient } from '@fetchski/attract-cms-sdk';
import { validateBlogImport } from '../src/attract/validate-blog-import.ts';

const site = createSiteClient();
console.log(await validateBlogImport(site));
```

```bash Terminal theme={"dark"}
node --env-file=.env scripts/validate-blog-import.ts
```

A route handler, a job or a queue worker calls it the same way.

Findings are the answer: a document with problems still returns 200 with `valid: false`.

**Publishing:** `publish=true` publishes only when the caller may (a key needs `content:blog:publish`); otherwise the post is saved as a draft. An MDX import is always a draft.

> [accordion] Required parameters
>
> One object, e.g. `validateBlogImport({ markdown })`; leave out the optional fields.
>
> **markdown** `string` *required*
>
> **Required.** The whole document, exactly as the import would take it.

> [accordion] Optional parameters
>
> **generateImages** `boolean | null | undefined`
>
> **Optional.** Leave it out (or pass `null`) and it isn’t sent: the site’s default applies. The same as the body’s `generateImages`.
>
> **format** `Format | null | undefined`
>
> **Optional.** Leave it out and the site uses `"md"`. How to read `markdown`: plain Markdown (`md`) or MDX (`mdx`). One of `md`, `mdx`.
>
> **filenames** `readonly string[] | null | undefined`
>
> **Optional.** Leave it out (or pass `null`) and it isn’t sent: the site’s default applies. The image filenames the real import will post, so references to them count as found. At most 10 items.

> [accordion] Returns
>
> A `BlogValidateResult`. The findings. Read its properties (`blogValidateResult.valid`): each says whether the site always sends it.
>
> **valid** `boolean`
>
> **Always sent.**
>
> **errors** `readonly BlogValidateResultErrorsItem[]`
>
> **Always sent.** A list of `BlogValidateResultErrorsItem`.
>
> **BlogValidateResultErrorsItem**
>
> **message** `string`
>
> **Always sent.** What is wrong and how to fix it.
>
> **line** `number`
>
> **Sometimes sent:** `undefined` when the site leaves it out. The body line, when known.
>
> **tag** `string`
>
> **Sometimes sent:** `undefined` when the site leaves it out. The MDX component, when one is at fault.

> [accordion] Errors
>
> Nothing to catch: the SDK retries what is safe, and throws the rest as the classes below; catch only what you want to react to (see [Errors and testing](https://docs.fetchski-attract.com/typescript/errors.md)).
>
> **ValidationFailed** `400`
>
> The request is not valid; the message says which part and how to fix it.
>
> **Retried first:** No. **Read:** `errors` (field → messages), `siteMessage`.
>
> **AuthenticationFailed** `401`
>
> The API key is missing, malformed, unknown, disabled, expired or archived, or a request its signing mode requires to be signed is not.
>
> **Retried first:** No. **Read:** `siteMessage`, `errorName`, `data`.
>
> **Forbidden** `403`
>
> The API key lacks the scope this route needs (the message names it) or is used from outside its allowlist; or, on a route that answers 403 to everyone it refuses, the caller may not use it.
>
> **Retried first:** No. **Read:** `siteMessage`, `errorName`, `data`.
>
> **RateLimited** `429`
>
> The key used up its per-minute limit. Still, after the client’s own waits and retries.
>
> **Retried first:** Yes: the client waits `Retry-After` (1 s when absent; over 60 s it gives up at once) and retries, up to `retries` times (2 by default). **Read:** `retryAfter` (seconds, or null), `siteMessage`.
>
> **SiteError** `5xx`
>
> The site failed (or something in front of it did). Its logs say why.
>
> **Retried first:** No: a write may have landed. **Read:** `siteMessage`, `errorName`, `data`.
>
> **SiteUnreachable** `no answer`
>
> No answer: DNS, a refused connection, TLS, or the timeout (15 s per attempt by default).
>
> **Retried first:** Only when nothing reached the site (`neverConnected()`); never after a timeout, when it may have landed. **Read:** `reason`, `neverConnected`.
>
> **RequestNotSent** `not sent`
>
> The client refused to send it (e.g. a path segment of `..`); the site never saw it.
>
> **Retried first:** No. **Read:** `reason` (what to change).
>
> **SiteRequestFailed** `any other`
>
> Any other status, or a success whose JSON doesn’t match this SDK version’s types (update the SDK).
>
> **Retried first:** No. **Read:** `reason`, `status`.
>
> **UnknownSite** `setup`
>
> `sites.forSite('acme')` named a slug your sites (`createSiteClients()`) don’t have.
>
> **Retried first:** No: nothing was sent. **Read:** `message`, `slug`.
>
> **SiteConfigurationError** `setup`
>
> The client’s settings are wrong: no `FETCHSKI_ATTRACT_URL` (or `baseUrl`), or a malformed API key.
>
> **Retried first:** No: nothing was sent. **Read:** `message` (what to fix).

## Behavior

* **Access:** an API key with `content:blog:write`, or `content:blog:all`, or `content:all`, or `admin:all`, or a signed-in user holding the `blog:import-markdown` permission. Other callers get 403.
* **Rate limit:** the key’s own writes-per-minute limit, set when the key is created (default 120), and 30 imports and validations a minute per caller: whichever runs out first answers 429 with `Retry-After`. The client waits and retries for you; you see `RateLimited` only if that runs out.
* **Retries:** a write is sent again only after a 429 (refused before it acted) or when it never reached the site. After a timeout or a 5xx it may have landed: check before you send it again.
* **Timeout:** 15 s per attempt by default; raise `timeout` (milliseconds) on the client for longer.

## Test it

It calls the function above with a fake client: the fake answers every call with a valid example, so nothing leaves your machine and no settings or key are needed. Run it with `node --test`.

```ts tests/blogPosts-validateBlogImport.test.ts theme={"dark"}
import { test } from 'node:test';
import { fakeSite } from '@fetchski/attract-cms-sdk/testing';
import { validateBlogImport } from '../src/attract/validate-blog-import.ts';

test('blogPosts.validateBlogImport', async () => {
  const site = fakeSite();
  await validateBlogImport(site);
  site.assertCalled('blogPosts.validateBlogImport');
});
```

**Answer with your own values:** fake `blogPosts.validateBlogImport` with `factories.BlogValidateResult({...})`, the fields you give over a valid example.

```ts tests/blogPosts-validateBlogImport-answer.test.ts theme={"dark"}
import assert from 'node:assert/strict';
import { test } from 'node:test';
import { factories, fakeSite } from '@fetchski/attract-cms-sdk/testing';

test('blogPosts.validateBlogImport answers your values', async () => {
  const site = fakeSite({
    'blogPosts.validateBlogImport': factories.BlogValidateResult({ valid: false })
  });
  const blogValidateResult = await site.blogPosts().validateBlogImport({ markdown: 'Example markdown' });
  assert.equal(blogValidateResult.valid, false);
});
```

## Related

> [card] [List a blog post’s locales](https://docs.fetchski-attract.com/typescript/reference/blog-posts/get-blog-locales.md)
>
> `site.blogPosts().getBlogLocales()`

> [card] [Get the Markdown template](https://docs.fetchski-attract.com/typescript/reference/blog-posts/get-blog-markdown-template.md)
>
> `site.blogPosts().getBlogMarkdownTemplate()`

> [card] [Get the MDX template](https://docs.fetchski-attract.com/typescript/reference/blog-posts/get-blog-mdx-template.md)
>
> `site.blogPosts().getBlogMdxTemplate()`

> [card] [List blog posts](https://docs.fetchski-attract.com/typescript/reference/blog-posts/list-blogs.md)
>
> `site.blogPosts().listBlogs()`

> [card] [Create a blog post](https://docs.fetchski-attract.com/typescript/reference/blog-posts/create-blog.md)
>
> `site.blogPosts().createBlog()`

> [card] [Get a blog post](https://docs.fetchski-attract.com/typescript/reference/blog-posts/get-blog.md)
>
> `site.blogPosts().getBlog()`

> [card] [POST /@apostrophecms/blog/from-markdown/validate](https://docs.fetchski-attract.com/api-reference/blog-posts/check-a-document-before-importing-it.md)
>
> The endpoint this calls, in the API reference: the HTTP request and answer, and every rule the site checks.


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