medium_final.js

const graphql_query = `
query UserStreamOverview($userId: ID!, $pagingOptions: PagingOptions) {
  user(username: $userId) {
    name
    profileStreamConnection(paging: $pagingOptions) {
      ...commonStreamConnection
      __typename
    }
    __typename
  }
}
fragment commonStreamConnection on StreamConnection {
  pagingInfo {
    next {
      limit
      page
      source
      to
      ignoredIds
      __typename
    }
    __typename
  }
  stream {
    ...StreamItemList_streamItem
    __typename
  }
  __typename
}
fragment StreamItemList_streamItem on StreamItem {
  ...StreamItem_streamItem
  __typename
}
fragment StreamItem_streamItem on StreamItem {
  itemType {
    __typename
    ... on StreamItemPostPreview {
        post {
            id
            mediumUrl
            title
            firstPublishedAt
            creator {
                name
            }
            previewImage {
                id
            }
            tags {
                id
            }
            __typename
        }
      __typename
    }
  }
  __typename
}
`
const page_limit = 25;
async function get_medium_post(username, page) {
  let graphql_body = {
    "operationName": "UserStreamOverview",
    "query": graphql_query,
    "variables": {
      "userId": username,
      "pagingOptions": {
          "limit": page_limit,
          "page": null,
          "source": null,
          "to": page ? String(page) : String(Date.now()),
          "ignoredIds":null
      }
    }
  }

  // NOTE: sending request to rss2json to help us transofrm rss to json data
  let resp = await fetch(
    "https://medium.com/_/graphql",
    {
      method: "POST",
      headers: {
        "Content-Type": "application/json"
      },
      body: JSON.stringify(graphql_body)
    }
  );

  // NOTE: strip non-post items and strip description fields
  let resp_data = await resp.json();
  let author = resp_data.data.user.name;
  let posts = resp_data.data.user.profileStreamConnection.stream
    .map(stream => {
      return stream.itemType.post
    })
    .map(post => {
      return {
        "title": post.title,
        "link": post.mediumUrl,
        "pubDate": post.firstPublishedAt,
        "thumbnail": "https://miro.medium.com/focal/875/263/11/60/" + post.previewImage.id,
        "categories": post.tags.map(tag_obj => tag_obj.id)
      }
    }
  );

  if (posts.length === page_limit) {
    next = resp_data.data.user.profileStreamConnection.pagingInfo.next.to;
  } else {
    next = null;
  }
  
  return {
    "author": author,
    "posts": posts,
    "next": next
  };
}