lấy hết comment trong bài viết của nhóm.

get_comment.js

function getDTSG() {
  return JSON.parse(document.querySelector("#__eqmc").textContent).f;
}

async function getComments(id, dtsg, reactions, after = "null") {
  console.log(new Date().toLocaleString(), "Get comments....");
  const urlencoded = new URLSearchParams();
  urlencoded.append("__a", "1");
  urlencoded.append("__comet_req", "15");
  urlencoded.append("fb_dtsg", dtsg);
  urlencoded.append(
    "variables",
    '{"commentsAfterCount":-1,"commentsAfterCursor":' +
      after +
      ',"commentsBeforeCount":null,"commentsBeforeCursor":null,"commentsIntentToken":null,"feedLocation":"GROUP_PERMALINK","focusCommentID":null,"scale":1,"useDefaultActor":false,"id":"' +
      id +
      '"}'
  );
  urlencoded.append(
    "doc_id",
    require("CommentsListComponentsPaginationQuery_facebookRelayOperation")
  );

  const requestOptions = {
    method: "POST",
    body: urlencoded,
    redirect: "follow",
  };

  const response = await fetch(
    "https://www.facebook.com/api/graphql/",
    requestOptions
  );
  const json = await response.json();
  const { data } = json;
  const items =
    data.node.comment_rendering_instance_for_feed_location.comments.edges
      .map((item) => {
        const node = item.node;
        const { author, body_renderer } = node;
        if (!body_renderer) {
          return null;
        }
        return {
          id: node.legacy_fbid,
          author: pick(author, ["id", "name", "url"]),
          message: body_renderer.text,
          tagged: body_renderer.ranges.map((range) =>
            pick(range.entity, ["id", "url"])
          ),
          reaction: reactions.find((r) => r.id === author.id)?.reaction || {
            id: null,
            name: null,
            label: null,
          },
        };
      })
      .filter((i) => !!i);
  console.log(
    new Date().toLocaleString(),
    `Get more ${items.length} comments...`
  );
  if (
    data.node.comment_rendering_instance_for_feed_location.comments.page_info
      .has_next_page
  ) {
    return items.concat(
      await getComments(
        id,
        dtsg,
        reactions,
        `"${data.node.comment_rendering_instance_for_feed_location.comments.page_info.end_cursor}"`
      )
    );
  }
  return items;
}

async function getReactions(id, dtsg, reactionTypes, after = "null") {
  console.log(new Date().toLocaleString(), "Get reaction....");
  const urlencoded = new URLSearchParams();
  urlencoded.append("__a", "1");
  urlencoded.append("fb_dtsg", dtsg);
  urlencoded.append(
    "variables",
    '{"count":10,"cursor":' +
      after +
      ',"feedbackTargetID":"' +
      id +
      '","reactionID":null,"scale":1,"id":"' +
      id +
      '"}'
  );
  urlencoded.append(
    "doc_id",
    require("CometUFIReactionsDialogTabContentRefetchQuery_facebookRelayOperation")
  );

  const requestOptions = {
    method: "POST",
    body: urlencoded,
    redirect: "follow",
  };

  const response = await fetch(
    "https://www.facebook.com/api/graphql/",
    requestOptions
  );
  const json = await response.json();
  const { data } = json;
  const items = data.node.reactors.edges
    .map((item) => {
      const node = item.node;
      const reactionId = item.feedback_reaction_info.id;
      const reactionType = reactionTypes[reactionId];
      return {
        ...pick(node, ["id", "name", "url"]),
        reaction: {
          id: reactionId,
          name: reactionType.name,
          label: reactionType.display_name,
        },
      };
    })
    .filter((i) => !!i);
  console.log(
    new Date().toLocaleString(),
    `Get more ${items.length} reactions...`
  );
  if (data.node.reactors.page_info.has_next_page) {
    return items.concat(
      await getReactions(
        id,
        dtsg,
        reactionTypes,
        `"${data.node.reactors.page_info.end_cursor}"`
      )
    );
  }
  return items;
}

function pick(obj, keys) {
  return keys.reduce((acc, key) => {
    return { ...acc, [key]: obj[key] };
  }, {});
}

function last(arr) {
  return arr[arr.length - 1];
}

function sleep(ms) {
  return new Promise((resolve) => setTimeout(resolve, ms));
}

(async () => {
  console.log("Open reaction dialog");
  document
    .querySelector('[role="toolbar"]')
    .firstElementChild.querySelector("div")
    .click();
  await sleep(3000);
  const id = btoa(
    "feedback:" + last(location.pathname.split("/").filter((i) => !!i.trim()))
  );
  const dtsg = getDTSG();
  const reactionTypes = require("DynamicUFIReactionTypes").reactions;
  const reactions = await getReactions(id, dtsg, reactionTypes);
  console.log(reactions);
  const comments = await getComments(id, dtsg, reactions);
  console.log(comments);
  console.log("Done");
  // open('https://www.convertcsv.com/json-to-csv.htm', '_blank');
})().catch(console.error);

mở dialog này trước khi chạy