diff --git a/.ep_initialized b/.ep_initialized
new file mode 100644
index 0000000..348ebd9
--- /dev/null
+++ b/.ep_initialized
@@ -0,0 +1 @@
+done
\ No newline at end of file
diff --git a/LICENSE b/LICENSE
new file mode 100755
index 0000000..366aa1a
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
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+      "License" shall mean the terms and conditions for use, reproduction,
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+      "Legal Entity" shall mean the union of the acting entity and all
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+      "You" (or "Your") shall mean an individual or Legal Entity
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+      "Derivative Works" shall mean any work, whether in Source or Object
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+      "Contribution" shall mean any work of authorship, including
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+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
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+   2. Grant of Copyright License. Subject to the terms and conditions of
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+   4. Redistribution. You may reproduce and distribute copies of the
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+      (a) You must give any other recipients of the Work or
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+      (b) You must cause any modified files to carry prominent notices
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+      (c) You must retain, in the Source form of any Derivative Works
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+          notices within Derivative Works that You distribute, alongside
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+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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+      appropriateness of using or redistributing the Work and assume any
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+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright 2013 THE ETHERPAD FOUNDATION
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
diff --git a/README.md b/README.md
new file mode 100755
index 0000000..e1d982b
--- /dev/null
+++ b/README.md
@@ -0,0 +1,30 @@
+## Who made what changes to a pad?
+
+And when?  This plugin aids to help authors that have been absent from a pad only to return and find that the content they contributed has been removed.  The author can see who removed content and also who added new content.
+
+To use the plugin visit the timeslider and click the Magnifying glass button.
+
+# Installing
+
+Option 1.
+
+Use the ``/admin`` interface, search for ``ep_who_did_what`` and click Install
+
+Option 2.
+```
+npm install ep_who_did_what
+```
+
+Option 3.
+```
+cd your_etherpad_install/node_modules
+git clone https://github.com/JohnMcLear/ep_who_did_what
+```
+
+# Bug Reports
+
+Please submit bug reports or patches at https://github.com/JohnMcLear/ep_who_did_what/issues
+
+# Todo
+
+- [ ] Full test coverage
diff --git a/ep.json b/ep.json
new file mode 100755
index 0000000..b172f35
--- /dev/null
+++ b/ep.json
@@ -0,0 +1,20 @@
+{
+    "parts": [
+        {
+            "name": "ep_who_did_what",
+            "hooks": {
+                "eejsBlock_timesliderStyles": "ep_who_did_what/index",
+                "eejsBlock_timesliderScripts": "ep_who_did_what/index",
+                "eejsBlock_timesliderEditbarRight": "ep_who_did_what/index",
+                "eejsBlock_timesliderBody": "ep_who_did_what/index",
+                "clientVars": "ep_who_did_what/index",
+                "eejsBlock_mySettings": "ep_who_did_what/index",
+                "eejsBlock_body": "ep_who_did_what/index",
+                "eejsBlock_customStyles": "ep_who_did_what/index",
+                "expressCreateServer": "ep_who_did_what/express"
+            },
+            "client_hooks": {
+            }
+        }
+    ]
+}
diff --git a/exportWhoDidWhat.js b/exportWhoDidWhat.js
new file mode 100644
index 0000000..5ead415
--- /dev/null
+++ b/exportWhoDidWhat.js
@@ -0,0 +1,144 @@
+var async = require("ep_etherpad-lite/node_modules/async");
+var Changeset = require("ep_etherpad-lite/static/js/Changeset");
+var padManager = require("ep_etherpad-lite/node/db/PadManager");
+var ERR = require("ep_etherpad-lite/node_modules/async-stacktrace");
+var Security = require('ep_etherpad-lite/static/js/security');
+var authorManager = require('ep_etherpad-lite/node/db/AuthorManager')
+var Pad = require('ep_etherpad-lite/node/db/Pad')
+
+exports.whoDidWhat = async function(padId, revNum, callback)
+{
+  let exists = await padManager.doesPadExists(padId);
+  if (!exists) {
+    console.error("Pad does not exist");
+    process.exit(1);
+  }
+
+  // get the pad
+  let pad = await padManager.getPad(padId);
+  var head = pad.getHeadRevisionNumber();
+
+  //create an array with all revisions
+  var revisions = [];
+  var beginningTime;
+  var endTime;
+
+  for(var i=0;i<=head;i++)
+  {
+    revisions.push(i);
+  }
+
+  let authors = await pad.getAllAuthors();
+  var authorsObj = {};
+  var items = {};
+  var prevDate;
+  var threshold = 10; // CAKE TODO
+
+  for(var author in authors){
+    let authr = await authorManager.getAuthor(authors[author]);
+    let color = await authorManager.getAuthorColorId(authors[author]);
+    let authorName = await authorManager.getAuthorName(authors[author]);
+    authorsObj[authors[author]] = {};
+    authorsObj[authors[author]].name = authorName;
+
+    if(typeof color === "string" && color.indexOf("#") !== -1){
+      authorsObj[authors[author]].color = color;
+    }else{
+      // color needs to come from index
+      let palette = authorManager.getColorPalette();
+      color = palette[color];
+      authorsObj[authors[author]].color = color;
+    }
+  }
+
+  //run trough all revisions
+  async.forEachSeries(revisions, async function(revNum, callback){
+
+    let revision = await pad.getRevision(revNum);
+
+    if(authorsObj[revision.meta.author]){
+      var authorColor = authorsObj[revision.meta.author].color.toUpperCase();
+      var authorName = authorsObj[revision.meta.author].name;
+      if(!authorName) authorName = "Anonymous"
+      var opType = typeOfOp(revision.changeset);
+      var unpacked = Changeset.unpack(revision.changeset);
+      var changeLength = Math.abs(unpacked.oldLen - unpacked.newLen);
+      var per = Math.round(( 100 / unpacked.oldLen) * changeLength);
+      var humanTime = new Date(revision.meta.timestamp).toLocaleTimeString();
+      var humanDate = new Date(revision.meta.timestamp).toDateString();
+
+      if(opType === "="){
+        var actionString = "changed some attributes"
+        var keyword = "orange";
+      }
+      if(opType === "-"){
+        var actionString = "removed some content("+changeLength+" chars[" + per +"%]";
+        var keyword = "red";
+      }
+      if(opType === "+"){
+        var actionString = "added some content("+changeLength+" chars[" + per +"%]";
+        var keyword = "green"
+      }
+
+      if(prevDate === humanDate){
+        var logString = "#" + revNum + 	" at " + humanTime + " " + authorName + " " + actionString;
+      }else{
+        if(per > threshold){
+          // console.log(humanDate);
+          var logString = "#" + revNum + 	" at " + humanTime + " " + authorName + " " + actionString;
+        }
+      }
+
+      // By default we ignore any percentage that is lower than 1%
+      if(per > threshold){
+        // console.log(keyword, logString);
+        prevDate = humanDate;
+        items[revNum] = {
+          "timestamp": revision.meta.timestamp,
+          "time": humanTime,
+          "date": humanDate,
+          "authorName": authorName,
+          "opType": opType,
+          "changeLength": changeLength,
+          "percent": per
+        }
+      }
+
+    }
+
+    // setImmediate required else it will crash on large pads
+    // See https://caolan.github.io/async/v3/ Common Pitfalls
+    async.setImmediate(function() {
+      callback()
+    });
+  }, function(){
+    callback(null, items);
+  });
+};
+
+// returns "-", "+" or "=" depending on the type of edit
+function typeOfOp(changeset){
+  var unpacked = Changeset.unpack(changeset);
+  var iter = Changeset.opIterator(unpacked.ops);
+  while (iter.hasNext()) {
+    var o = iter.next();
+    var code;
+    switch (o.opcode) {
+    case '=':
+      code = "="
+      break;
+    case '-':
+      code = "-"
+      break;
+    case '+':
+      {
+        code = "+"
+        break;
+      }
+    }
+  }
+
+  return code;
+}
+
+
diff --git a/express.js b/express.js
new file mode 100644
index 0000000..0a5cf70
--- /dev/null
+++ b/express.js
@@ -0,0 +1,14 @@
+var exportWhoDidWhat = require('./exportWhoDidWhat');
+
+exports.expressCreateServer = function (hook_name, args, cb) {
+  args.app.get('/p/:pad/:rev?/export/whoDidWhat', function(req, res, next) {
+    var padID = req.params.pad;
+    var revision = req.params.rev ? req.params.rev : null;
+
+    exportWhoDidWhat.whoDidWhat(padID, revision, function(err, result) {
+//      res.attachment(padID+'.json');
+      res.contentType('text/json');
+      res.send(result);
+    });
+  });
+};
diff --git a/index.js b/index.js
new file mode 100755
index 0000000..dd6cf10
--- /dev/null
+++ b/index.js
@@ -0,0 +1,67 @@
+/**
+ * Copyright 2020 John McLear <john@mclear.co.uk>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS-IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+var log4js = require('ep_etherpad-lite/node_modules/log4js')
+var statsLogger = log4js.getLogger("stats");
+var eejs = require('ep_etherpad-lite/node/eejs/');
+var settings = require('ep_etherpad-lite/node/utils/Settings');
+var stats = require('ep_etherpad-lite/node/stats')
+
+exports.eejsBlock_timesliderStyles = function(fn, args, cb){
+  return cb();
+}
+
+exports.eejsBlock_timesliderScripts = function(fn, args, cb){
+  args.content = args.content + eejs.require("ep_who_did_what/static/js/whoDidWhat.js");
+// "<script type='text/javascript' src='../../static/plugins/ep_who_did_what/static/js/whoDidWhat.js'></script>";
+  return cb();
+}
+
+exports.eejsBlock_timesliderEditbarRight = function(fn, args, cb){
+  args.content = args.content + eejs.require("ep_who_did_what/templates/button.ejs", {}, module);
+  return cb();
+}
+
+exports.eejsBlock_timesliderBody = function(fn, args, cb){
+  args.content = args.content + eejs.require("ep_who_did_what/templates/modal.ejs", {}, module);
+}
+
+exports.clientVars = function(hook, context, callback)
+{
+  if(!settings.ep_what_have_i_missed) settings.ep_what_have_i_missed = {};
+  return callback({
+    ep_what_have_i_missed: {
+    }
+  });
+};
+
+exports.eejsBlock_mySettings = function (hook, context, callback)
+{
+  if(!settings.ep_what_have_i_missed) settings.ep_what_have_i_missed = {};
+  context.content += eejs.require('ep_what_have_i_missed/templates/settings.ejs', {
+  });
+  callback();
+};
+
+exports.eejsBlock_customStyles = function (hook_name, args, cb) {
+  args.content = args.content + eejs.require("ep_what_have_i_missed/templates/styles.html", {}, module);
+  return cb();
+};
+
+
+exports.eejsBlock_body = function (hook_name, args, cb) {
+  args.content = args.content + eejs.require("ep_what_have_i_missed/templates/diff.ejs", {}, module);
+  return cb();
+};
diff --git a/locales/en.json b/locales/en.json
new file mode 100755
index 0000000..083c610
--- /dev/null
+++ b/locales/en.json
@@ -0,0 +1,3 @@
+{
+    "pad.ep_who_did_what_catchup.title": "Who made changes to this pad and when?"
+}
diff --git a/package.json b/package.json
new file mode 100755
index 0000000..31f30af
--- /dev/null
+++ b/package.json
@@ -0,0 +1,8 @@
+{
+  "name": "ep_who_did_what",
+  "version": "0.0.1",
+  "description": "Who made what changes to a pad?  A historical report available in the timeslider",
+  "author": "John McLear <john@mclear.co.uk>",
+  "contributors": [],
+  "dependencies": {}
+}
diff --git a/static/js/diff.min.js b/static/js/diff.min.js
new file mode 100644
index 0000000..976ad93
--- /dev/null
+++ b/static/js/diff.min.js
@@ -0,0 +1,38 @@
+/*!
+
+ diff v4.0.1
+
+Software License Agreement (BSD License)
+
+Copyright (c) 2009-2015, Kevin Decker <kpdecker@gmail.com>
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms, with or without modification,
+are permitted provided that the following conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of Kevin Decker nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
+IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
+IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+@license
+*/
+!function(e,n){"object"==typeof exports&&"undefined"!=typeof module?n(exports):"function"==typeof define&&define.amd?define(["exports"],n):n((e=e||self).Diff={})}(this,function(e){"use strict";function t(){}function g(e,n,t,r,i){for(var o=0,s=n.length,l=0,a=0;o<s;o++){var u=n[o];if(u.removed){if(u.value=e.join(r.slice(a,a+u.count)),a+=u.count,o&&n[o-1].added){var f=n[o-1];n[o-1]=n[o],n[o]=f}}else{if(!u.added&&i){var d=t.slice(l,l+u.count);d=d.map(function(e,n){var t=r[a+n];return t.length>e.length?t:e}),u.value=e.join(d)}else u.value=e.join(t.slice(l,l+u.count));l+=u.count,u.added||(a+=u.count)}}var c=n[s-1];return 1<s&&"string"==typeof c.value&&(c.added||c.removed)&&e.equals("",c.value)&&(n[s-2].value+=c.value,n.pop()),n}t.prototype={diff:function(a,u){var e=2<arguments.length&&void 0!==arguments[2]?arguments[2]:{},n=e.callback;"function"==typeof e&&(n=e,e={}),this.options=e;var f=this;function d(e){return n?(setTimeout(function(){n(void 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diff --git a/static/js/whoDidWhat.js b/static/js/whoDidWhat.js
new file mode 100755
index 0000000..41a7c82
--- /dev/null
+++ b/static/js/whoDidWhat.js
@@ -0,0 +1,19 @@
+<script type="text/javascript">
+toggleWhoDidWhatReport = function(){
+  var hasRun = false;
+  var module = $("#whoDidWhat");
+  if (module.hasClass('popup-show')) {
+    $('#whoDidWhat').removeClass('popup-show');
+  } else {
+    if(!hasRun){
+      hasRun = true;
+      console.log("getting who did what report");
+      $.getJSON("./export/whoDidWhat", function(data){
+        $('#whoDidWhatOutput').text(data);
+        console.log(data);
+      });
+    }
+    $('#whoDidWhat').addClass('popup-show');
+  }
+}
+</script>
diff --git a/static/tests/frontend/specs/enable_disable.js b/static/tests/frontend/specs/enable_disable.js
new file mode 100755
index 0000000..dce6b88
--- /dev/null
+++ b/static/tests/frontend/specs/enable_disable.js
@@ -0,0 +1,36 @@
+describe('enable and disable author follow', function() {
+  beforeEach(function(cb) {
+    // Make sure webrtc is disabled, and reload with the firefox fake webrtc pref
+    // (Chrome needs a CLI parameter to have fake webrtc)
+    helper.newPad(cb);
+    this.timeout(60000);
+  });
+
+  it('disables author follow if the user uses the checkbox', function(done) {
+    var chrome$ = helper.padChrome$;
+    var $cb = chrome$("#options-enableFollow");
+    expect($cb.prop("checked")).to.be(true);
+    expect(chrome$.window.clientVars.ep_what_have_i_missed.enableFollow).to.be(true);
+    $cb.click();
+
+    expect($cb.prop("checked")).to.be(false)
+
+    helper.waitFor(function(){
+      return chrome$.window.clientVars.ep_what_have_i_missed.enableFollow === false;
+    }, 1000).done(done);
+  });
+
+  it('enables author follow if the user uses the checkbox', function(done) {
+    var chrome$ = helper.padChrome$;
+    var $cb = chrome$("#options-enableFollow");
+    expect($cb.prop("checked")).to.be(true)
+    expect(chrome$.window.clientVars.ep_what_have_i_missed.enableFollow).to.be(true);
+    $cb.click();
+    $cb.click();
+    expect($cb.prop("checked")).to.be(true)
+
+    helper.waitFor(function(){
+      return chrome$.window.clientVars.ep_what_have_i_missed.enableFollow === true;
+    }, 1000).done(done);
+  });
+});
diff --git a/templates/button.ejs b/templates/button.ejs
new file mode 100644
index 0000000..5511c11
--- /dev/null
+++ b/templates/button.ejs
@@ -0,0 +1,7 @@
+<ul><!-- note this is a temp fix -->
+  <li data-type="button" data-key="who_did_what" onClick="toggleWhoDidWhatReport();">
+    <a class="grouped-left ep_who_did_what" data-l10n-id="ep_who_did_what" title="Who did what?" aria-label="who did what">
+      <button class="buttonicon buttonicon-who_did_what ep_who_did_what" data-l10n-id="ep_who_did_what_" title="Who did what?" aria-label="who_did_what">🔍</button>
+    </a>
+  </li>
+</ul>
diff --git a/templates/diff.ejs b/templates/diff.ejs
new file mode 100755
index 0000000..44b559d
--- /dev/null
+++ b/templates/diff.ejs
@@ -0,0 +1,8 @@
+<div class="popup toolbar-popup ep_what_have_i_missed-popup" id="ep_what_have_i_missedModal">
+  <div class="popup-content">
+    <pre id="diffDisplay"></pre>
+    <p>
+      <button id="timesliderLink">To see further history visit the timeslider</button>.
+    </p>
+  </div>
+</div>
diff --git a/templates/modal.ejs b/templates/modal.ejs
new file mode 100644
index 0000000..e794060
--- /dev/null
+++ b/templates/modal.ejs
@@ -0,0 +1,5 @@
+<div id="whoDidWhat" class="whoDidWhat popup toolbar-popup">
+  <div class="popup-content">
+    <div id="whoDidWhatOutput"></div>
+  </div>
+</div>
diff --git a/templates/settings.ejs b/templates/settings.ejs
new file mode 100755
index 0000000..e69de29
diff --git a/templates/styles.html b/templates/styles.html
new file mode 100755
index 0000000..44ed433
--- /dev/null
+++ b/templates/styles.html
@@ -0,0 +1,8 @@
+<style type="text/css">
+#diffDisplay{
+
+}
+#ep_what_have_i_missed{
+  color:red;
+}
+</style>