Quick and dirty snippet for exporting links from Google Spaces

dump_google_spaces.js

/**
 * This dirty, dirty script, allows you to export links from google spaces
 * so that you don't have to do it manually before April 17th.
 * I could not find any official way to do this so I quickly threw this script
 * together.
 *
 * USAGE:
 * 1. Place yourself on the space page you want to export 
 *    (such as: https://spaces.google.com/space/XXXXXXXXXXXXXXX)
 *
 * 2. Refresh the page (don't forget to do this)
 *
 * 3. Paste the following script in the console run it
 *
 * 4. Choose a location for the resulting file
 *
 * I've only tested this in Chrome 50 only.
 * It probably needs a modern browser given that I've used ES6 Promises.
 */

function waitForCb(selector, resolve, action) {
  if (!document.querySelector(selector)) {
    if (action) { action(selector); };
    setTimeout(waitForCb.bind(this, selector, resolve, action), 500);
  } else {
      console.log("Selector detected", selector);
      resolve();
  }
}

function waitFor(selector, action) {
  console.log("Waiting for", selector);
  return new Promise(function(resolve) {
    waitForCb(selector, resolve, action);
  });
}

function getScript(source, callback) {
    var script = document.createElement("script");
    var prior = document.getElementsByTagName("script")[0];
    script.async = 1;
    prior.parentNode.insertBefore(script, prior);

    script.onload = script.onreadystatechange = function( _, isAbort ) {
        if(isAbort || !script.readyState || /loaded|complete/.test(script.readyState) ) {
            script.onload = script.onreadystatechange = null;
            script = undefined;

            if(!isAbort) { if(callback) callback(); }
        }
    };

    script.src = source;
}

function dumpPosts() {
  var posts = Array.prototype.slice.call(document.querySelectorAll(".c1tmJe"));

  return posts.map(
    function(item) {
      var linkElem = item.querySelector("a.b3n6fb");
      var link = linkElem ? linkElem.getAttribute("href") : false;

      var titleElem = item.querySelector(".q9hwKf");
      var title = titleElem ? titleElem.innerHTML : false;
      
      var commentElem = item.querySelector(".RdlBPc");
      var comment = commentElem ? commentElem.innerHTML : false;

      return {
        title: title,
        link: link,
        comment: comment
      };
    }
  )
  .filter(function(item) { return Boolean(item.link) });
}

function loadMore() {  
  document.querySelector(".CtH2pf.eejsDc").scrollTop = 
    document.querySelector(".CtH2pf.eejsDc").scrollHeight
  ;
}

function loadAllContent() {
  return waitFor(".kGA74e", loadMore).then(function() {
    console.log("Dumping all posts");
    var data = dumpPosts();
    return Promise.resolve(data);
  });
}

function dumpCurrentSpace() {
  waitFor(".OlExvc.W8JrHd").then(function() {
    var name = document.querySelector(".OlExvc.W8JrHd").innerHTML;
    loadAllContent().then(function(data) {
      var f = new File([JSON.stringify(data, null, 4)], "Spaces "+name+".json", { type: "text/plain" });
      saveAs(f);
    });
  });
}

getScript("https://cdnjs.cloudflare.com/ajax/libs/FileSaver.js/1.3.3/FileSaver.min.js", function() {
  dumpCurrentSpace();
});