Proof of concept for a lite-style revision history in Google Docs

revisionHistoryLite.gs

function revisionHistoryLite() {
  var doc = DocumentApp.getActiveDocument();
  var eds = doc.getEditors();
  var original = doc.getBody().getParagraphs();

  var revs = Drive.Revisions.list(doc.getId())

  var editsList = [];

  for(var i=0; i<revs.items.length; i++) {
    var revision = revs.items[i];
    editsList.push([revision.id, revision.kind, revision.modifiedDate, revision.lastModifyingUser.emailAddress]);

    if(revision.lastModifyingUser.emailAddress == "bbennett@elkhart.k12.in.us") {
      var revUrl = Drive.Revisions.get(doc.getId(), revision.id).exportLinks["text/plain"] + "&access_token=" + ScriptApp.getOAuthToken();

      // revUrl returns https://docs.google.com/feeds/download/documents/export/Export?id=docIdString&revision=1&exportFormat=txt

      var revString = UrlFetchApp.fetch(revUrl).getContentText();
      // Logger.log(revString); // Contains full HTTP markup

      // Append the body contents to a temporary document for further processing
//      var tempDoc = DocumentApp.create("Temp").getBody();
//      
//      tempDoc.appendParagraph(revString);
      
      // Test the string for sameness in the doc
      // Ran into problems here testing a paragraph element as a string. Need to break it
      // into sections and capture the offsets at some point.
      for(var p=0; p<original.length; p++) {
        if(original[p].getText() == revString) {
          original[p].editAsText().setForegroundColor("#0000ff");
        }
        if(original[p].getText() == revString) {
          Logger.log(original[p].getText());
        }
      }
    }
  }
}