将文章导出到 WordPress 站点

此 query 将文章从当前 WordPress 站点导出到任意下游 WordPress 站点。

Gato GraphQL 插件（免费版）必须安装在下游网站上，并需要公开一个启用了「Nested mutations」的端点。

$update 参数用于指定是在下游站点创建还是更新文章。

更新文章时，上游站点与下游站点之间的公共标识符为文章的 slug。

query CheckHasPost($postSlug: String!)
{
  post(by: { slug: $postSlug }, status: any)
    @fail(
      message: "There is no post in the upstream site with the provided slug"
      data: {
        slug: $postSlug
      }
    )
  {
    rawTitle
      @export(as: "postTitle")
    rawContent
      @export(as: "postContent")
  }
 
  isMissingPostInUpstream: _isNull(value: $__post)
    @export(as: "isMissingPostInUpstream")
}
 
query ExportDownstreamGraphQLQuery
  @depends(on: "CheckHasPost")
  @skip(if: $isMissingPostInUpstream)
{
  query: _echo(value: """
 
mutation LoginUserAndUpdatePost(
  $update: Boolean! = false
  $username: String!
  $userPassword: String!
  $postSlug: String!
  $postTitle: String!
  $postContent: String!
) {
  loginUser(by: {
    credentials: {
      usernameOrEmail: $username,
      password: $userPassword
    }
  }) {
    userID
  }
 
  post(by: { slug: $postSlug }, status: any)
    @include(if: $update)
  {
    update(input: {
      title: $postTitle,
      contentAs: { html: $postContent },
    }) {
      status
      errors {
        __typename
        ...on ErrorPayload {
          message
        }
      }
      post {
        title
        slug
        content
        status
      }
    }
  }
 
  createPost(input: {
    title: $postTitle,
    slug: $postSlug,
    contentAs: { html: $postContent },
    status: draft
  })
    @skip(if: $update)
  {
    status
    errors {
      __typename
      ...on ErrorPayload {
        message
      }
    }
    post {
      title
      slug
      content
      status
    }
  }
}
 
    """
  )
    @export(as: "query")
    @remove
}
 
query ExportPostToWPSite(
  $downstreamServerGraphQLEndpointURL: String!
  $update: Boolean! = false
  $username: String!
  $userPassword: String!
  $postSlug: String!
)
  @depends(on: "ExportDownstreamGraphQLQuery")
  @skip(if: $isMissingPostInUpstream)
{
  _sendGraphQLHTTPRequest(
    input: {
      endpoint: $downstreamServerGraphQLEndpointURL,
      query: $query,
      variables: [
        {
          name: "update",
          value: $update
        },
        {
          name: "username",
          value: $username
        },
        {
          name: "userPassword",
          value: $userPassword
        },
        {
          name: "postSlug",
          value: $postSlug
        },
        {
          name: "postTitle",
          value: $postTitle
        },
        {
          name: "postContent",
          value: $postContent
        }
      ]
    }
  )
}