从 WordPress RSS 订阅源导入新文章

此 query 使用文章的标题、内容和摘要，从 WordPress RSS 订阅源导入所有新文章。

新文章是指在过去 24 小时内（可通过变量配置）创建的文章。每天执行此持久化 query 的自动化任务，即可自动从其他站点导入所有新文章。

变量 $url 接收 WordPress 文章归档 RSS 订阅源的 URL。通常为文章归档 URL + "/feed/rss/?withoutcomments=1"。例如：

https://wordpress.com/blog/feed/rss/?withoutcomments=1

变量 $timeDeltaInSeconds 指定将文章视为新文章的时间范围。默认值为 86400 秒（即一天）。

query GetTime(
  $timeDeltaInSeconds: Int! = 86400
) {
  now: _time
  
  newPostsStartTime: _intSubtract(
    from: $__now
    subtract: $timeDeltaInSeconds,
  )
    @export(as: "newPostsStartTime")
}
 
query GetPostsFromRSSFeedAndExportData(
  $url: URL!
)
  @depends(on: "GetTime")
{
  _sendHTTPRequest(input: {
    url: $url,
    method: GET
  }) {
    body
    rssJSON: _strDecodeXMLAsJSON(
      xml: $__body
      alwaysArrayTagNames: [
        "item",
      ],
    )
      @export(as: "rssJSON")
  }
}
 
query CreatePostInputsFromRSSFeed
  @depends(on: "GetPostsFromRSSFeedAndExportData")
{
  items: _objectProperty(
    object: $rssJSON,
    by: { path: "rss.channel.item" }
  )
  inputs: _echo(value: $__items)
    @underEachArrayItem(
      passValueOnwardsAs: "item"
      affectDirectivesUnderPos: [1, 2, 3, 4, 6]
    )
      @applyField(
        name: "_objectProperty"
        arguments: {
          object: $item
          by: { key: "pubDate" }
        }
        passOnwardsAs: "dateAsString"
      )
      @applyField(
        name: "_strToTime",
        arguments: {
          string: $dateAsString
        },
        passOnwardsAs: "date"
      )
      @applyField(
        name: "_greaterThanOrEquals",
        arguments: {
          value1: $date,
          value2: $newPostsStartTime
        },
        passOnwardsAs: "isNewPost"
      )
      @unless(
        condition: $isNewPost
      )
        @setNull
      @if(
        condition: $isNewPost
        affectDirectivesUnderPos: [1, 2, 3, 4]
      )
        @applyField(
          name: "_objectProperty"
          arguments: {
            object: $item
            by: { key: "title" }
          }
          passOnwardsAs: "title"
        )
        @applyField(
          name: "_objectProperty"
          arguments: {
            object: $item
            by: { key: "content:encoded" }
          }
          passOnwardsAs: "content"
        )
        @applyField(
          name: "_objectProperty"
          arguments: {
            object: $item
            by: { key: "description" }
          }
          passOnwardsAs: "excerpt"
        )
        @applyField(
          name: "_echo",
          arguments: {
            value: {
              status: draft,
              contentAs: {
                html: $content
              },
              excerpt: $excerpt
              title: $title
            }
          },
          setResultInResponse: true
        )
    @arrayFilter
    @export(as: "inputs")
}
 
mutation ImportNewPostsFromWordPressRSSFeed
  @depends(on: "CreatePostInputsFromRSSFeed")
{
  createPosts(inputs: $inputs) {
    status
    errors {
      __typename
      ...on ErrorPayload {
        message
      }
    }
    post {
      id
      slug
      date
      status
 
      content
      excerpt
      title
    }
  }
}