13 files changed, 216 insertions, 30 deletions

diff --git a/lib/migrations/20180525153000-user-add-delete-token.js b/lib/migrations/20180525153000-user-add-delete-token.js
new file mode 100644
index 00000000..642fa5d4
--- /dev/null
+++ b/lib/migrations/20180525153000-user-add-delete-token.js
@@ -0,0 +1,13 @@
+'use strict'
+module.exports = {
+  up: function (queryInterface, Sequelize) {
+    return queryInterface.addColumn('Users', 'deleteToken', {
+      type: Sequelize.UUID,
+      defaultValue: Sequelize.UUIDV4
+    })
+  },
+
+  down: function (queryInterface, Sequelize) {
+    return queryInterface.removeColumn('Users', 'deleteToken')
+  }
+}
diff --git a/lib/models/author.js b/lib/models/author.js
index 8b4f74e5..03f832a4 100644
--- a/lib/models/author.js
+++ b/lib/models/author.js
@@ -24,12 +24,16 @@ module.exports = function (sequelize, DataTypes) {
         Author.belongsTo(models.Note, {
           foreignKey: 'noteId',
           as: 'note',
-          constraints: false
+          constraints: false,
+          onDelete: 'CASCADE',
+          hooks: true
         })
         Author.belongsTo(models.User, {
           foreignKey: 'userId',
           as: 'user',
-          constraints: false
+          constraints: false,
+          onDelete: 'CASCADE',
+          hooks: true
         })
       }
     }
diff --git a/lib/models/note.js b/lib/models/note.js
index 2a048e37..7d8e9625 100644
--- a/lib/models/note.js
+++ b/lib/models/note.js
@@ -85,13 +85,15 @@ module.exports = function (sequelize, DataTypes) {
       type: DataTypes.DATE
     }
   }, {
-    paranoid: true,
+    paranoid: false,
     classMethods: {
       associate: function (models) {
         Note.belongsTo(models.User, {
           foreignKey: 'ownerId',
           as: 'owner',
-          constraints: false
+          constraints: false,
+          onDelete: 'CASCADE',
+          hooks: true
         })
         Note.belongsTo(models.User, {
           foreignKey: 'lastchangeuserId',
diff --git a/lib/models/revision.js b/lib/models/revision.js
index 9ecd14dc..8bc95cb1 100644
--- a/lib/models/revision.js
+++ b/lib/models/revision.js
@@ -102,7 +102,9 @@ module.exports = function (sequelize, DataTypes) {
         Revision.belongsTo(models.Note, {
           foreignKey: 'noteId',
           as: 'note',
-          constraints: false
+          constraints: false,
+          onDelete: 'CASCADE',
+          hooks: true
         })
       },
       getNoteRevisions: function (note, callback) {
diff --git a/lib/models/user.js b/lib/models/user.js
index 0f6acd65..5dd13869 100644
--- a/lib/models/user.js
+++ b/lib/models/user.js
@@ -31,6 +31,10 @@ module.exports = function (sequelize, DataTypes) {
     refreshToken: {
       type: DataTypes.TEXT
     },
+    deleteToken: {
+      type: DataTypes.UUID,
+      defaultValue: Sequelize.UUIDV4
+    },
     email: {
       type: Sequelize.TEXT,
       validate: {
@@ -66,6 +70,9 @@ module.exports = function (sequelize, DataTypes) {
         })
       },
       getProfile: function (user) {
+        if (!user) {
+          return null
+        }
         return user.profile ? User.parseProfile(user.profile) : (user.email ? User.parseProfileByEmail(user.email) : null)
       },
       parseProfile: function (profile) {
diff --git a/lib/realtime.js b/lib/realtime.js
index 070bde2d..f6c62d4e 100644
--- a/lib/realtime.js
+++ b/lib/realtime.js
@@ -486,11 +486,13 @@ function startConnection (socket) {
       for (var i = 0; i < note.authors.length; i++) {
         var author = note.authors[i]
         var profile = models.User.getProfile(author.user)
-        authors[author.userId] = {
-          userid: author.userId,
-          color: author.color,
-          photo: profile.photo,
-          name: profile.name
+        if (profile) {
+          authors[author.userId] = {
+            userid: author.userId,
+            color: author.color,
+            photo: profile.photo,
+            name: profile.name
+          }
         }
       }
 
diff --git a/lib/response.js b/lib/response.js
index 89ade7a7..4cfa9a74 100644
--- a/lib/response.js
+++ b/lib/response.js
@@ -2,6 +2,7 @@
 // response
 // external modules
 var fs = require('fs')
+var path = require('path')
 var markdownpdf = require('markdown-pdf')
 var shortId = require('shortid')
 var querystring = require('querystring')
@@ -61,7 +62,10 @@ function responseError (res, code, detail, msg) {
 }
 
 function showIndex (req, res, next) {
-  res.render(config.indexPath, {
+  var authStatus = req.isAuthenticated()
+  var deleteToken = ''
+
+  var data = {
     url: config.serverURL,
     useCDN: config.useCDN,
     allowAnonymous: config.allowAnonymous,
@@ -81,10 +85,28 @@ function showIndex (req, res, next) {
     email: config.isEmailEnable,
     allowEmailRegister: config.allowEmailRegister,
     allowPDFExport: config.allowPDFExport,
-    signin: req.isAuthenticated(),
+    signin: authStatus,
     infoMessage: req.flash('info'),
-    errorMessage: req.flash('error')
-  })
+    errorMessage: req.flash('error'),
+    privacyStatement: fs.existsSync(path.join(config.docsPath, 'privacy.md')),
+    termsOfUse: fs.existsSync(path.join(config.docsPath, 'terms-of-use.md')),
+    deleteToken: deleteToken
+  }
+
+  if (authStatus) {
+    models.User.findOne({
+      where: {
+        id: req.user.id
+      }
+    }).then(function (user) {
+      if (user) {
+        data.deleteToken = user.deleteToken
+        res.render(config.indexPath, data)
+      }
+    })
+  } else {
+    res.render(config.indexPath, data)
+  }
 }
 
 function responseHackMD (res, note) {
diff --git a/lib/web/userRouter.js b/lib/web/userRouter.js
index 963961c7..db786d53 100644
--- a/lib/web/userRouter.js
+++ b/lib/web/userRouter.js
@@ -1,8 +1,11 @@
 'use strict'
 
+const archiver = require('archiver')
+const async = require('async')
 const Router = require('express').Router
 
 const response = require('../response')
+const config = require('../config')
 const models = require('../models')
 const logger = require('../logger')
 const {generateAvatar} = require('../letter-avatars')
@@ -36,6 +39,87 @@ UserRouter.get('/me', function (req, res) {
   }
 })
 
+// delete the currently authenticated user
+UserRouter.get('/me/delete/:token?', function (req, res) {
+  if (req.isAuthenticated()) {
+    models.User.findOne({
+      where: {
+        id: req.user.id
+      }
+    }).then(function (user) {
+      if (!user) {
+        return response.errorNotFound(res)
+      }
+      if (user.deleteToken === req.params.token) {
+        user.destroy().then(function () {
+          res.redirect(config.serverURL + '/')
+        })
+      } else {
+        return response.errorForbidden(res)
+      }
+    }).catch(function (err) {
+      logger.error('delete user failed: ' + err)
+      return response.errorInternalError(res)
+    })
+  } else {
+    return response.errorForbidden(res)
+  }
+})
+
+// export the data of the authenticated user
+UserRouter.get('/me/export', function (req, res) {
+  if (req.isAuthenticated()) {
+    // let output = fs.createWriteStream(__dirname + '/example.zip');
+    let archive = archiver('zip', {
+      zlib: { level: 3 } // Sets the compression level.
+    })
+    res.setHeader('Content-Type', 'application/zip')
+    res.attachment('archive.zip')
+    archive.pipe(res)
+    archive.on('error', function (err) {
+      logger.error('export user data failed: ' + err)
+      return response.errorInternalError(res)
+    })
+    models.User.findOne({
+      where: {
+        id: req.user.id
+      }
+    }).then(function (user) {
+      models.Note.findAll({
+        where: {
+          ownerId: user.id
+        }
+      }).then(function (notes) {
+        let list = []
+        async.each(notes, function (note, callback) {
+          let title
+          let extension = ''
+          do {
+            title = note.title + extension
+            extension++
+          } while (list.indexOf(title) !== -1)
+
+          list.push(title)
+          logger.debug('Write: ' + title + '.md')
+          archive.append(Buffer.from(note.content), { name: title + '.md', date: note.lastchangeAt })
+          callback(null, null)
+        }, function (err) {
+          if (err) {
+            return response.errorInternalError(res)
+          }
+
+          archive.finalize()
+        })
+      })
+    }).catch(function (err) {
+      logger.error('export user data failed: ' + err)
+      return response.errorInternalError(res)
+    })
+  } else {
+    return response.errorForbidden(res)
+  }
+})
+
 UserRouter.get('/user/:username/avatar.svg', function (req, res, next) {
   res.setHeader('Content-Type', 'image/svg+xml')
   res.setHeader('Cache-Control', 'public, max-age=86400')
diff --git a/locales/en.json b/locales/en.json
index 1aef3f6d..f9c29b53 100644
--- a/locales/en.json
+++ b/locales/en.json
@@ -105,5 +105,11 @@
 	"Export to Snippet": "Export to Snippet",
 	"Select Visibility Level": "Select Visibility Level",
 	"Night Theme": "Night Theme",
-	"Follow us on %s and %s.": "Follow us on %s, and %s."
+	"Follow us on %s and %s.": "Follow us on %s, and %s.",
+	"Privacy": "Privacy",
+	"Terms of Use": "Terms of Use",
+	"Do you really want to delete your user account?": "Do you really want to delete your user account?",
+	"This will delete your account, all notes that are owned by you and remove all references to your account from other notes.": "This will delete your account, all notes that are owned by you and remove all references to your account from other notes.",
+	"Delete user": "Delete user",
+	"Export user data": "Export user data"
 }
diff --git a/package.json b/package.json
index b7420ceb..20920e21 100644
--- a/package.json
+++ b/package.json
@@ -16,6 +16,7 @@
   },
   "dependencies": {
     "Idle.Js": "git+https://github.com/shawnmclean/Idle.js",
+    "archiver": "^2.1.1",
     "async": "^2.1.4",
     "aws-sdk": "^2.7.20",
     "base64url": "^3.0.0",
diff --git a/public/docs/privacy.md.example b/public/docs/privacy.md.example
new file mode 100644
index 00000000..08bf9091
--- /dev/null
+++ b/public/docs/privacy.md.example
@@ -0,0 +1,17 @@
+Privacy
+===
+
+We process the following data, for the following purposes:
+
+|your data|our usage|
+|---------|---------|
+|IP-Address|Used to communicate with your browser and our servers. It's may exposed to third-parties which provide resources for this service. These services are, depending on your login method, the document you visit and the setup of this instance: Google, Disqus, MathJax, GitHub, SlideShare/LinkedIn, yahoo, Gravatar, Imgur, Amazon, and Cloudflare.|
+|Usernames and profiles|Your username as well as user profiles that are connected with it are transmitted and stored by us to provide a useful login integration with services like GitHub, Facebook, Twitter, GitLab, Dropbox, Google. Depending on the setup of this HackMD instance there are maybe other third-parties involved using SAML, LDAP or the integration with a Mattermost instance.|
+|Profile pictures| Your profile picture is either loaded from the service you used to login, the HackMD instance or Gravatar.|
+|Uploaded pictures| Pictures that are uploaded for documents are either uploaded to Amazon S3, Imgur, a minio instance or the local filesystem of the HackMD server.|
+
+All account data and notes are stored in a mysql/postgres/sqlite database. Besides the user accounts and the document themselves also relationships between the documents and the user accounts are stored. This includes ownership, authorship and revisions of all changes made during the creation of a note.
+
+To delete your account and all your notes owned by your user account, you can find a button in the drop down menu on the front page.
+
+The deletion of guest notes is not possible. These don't have any ownership and this means we can't connect these to you or anyone else. If you participated in a guest note or a note owned by someone else, your authorship for the revisions is removed from these notes as well. But the content you created will stay in place as the integrity of these notes has to stay untouched.
diff --git a/public/js/cover.js b/public/js/cover.js
index c9c2b6cb..2a09b4c3 100644
--- a/public/js/cover.js
+++ b/public/js/cover.js
@@ -39,7 +39,7 @@ const options = {
             '<a href="#">' +
                 '<div class="item">' +
                     '<div class="ui-history-pin fa fa-thumb-tack fa-fw"></div>' +
-                    '<div class="ui-history-close fa fa-close fa-fw" data-toggle="modal" data-target=".delete-modal"></div>' +
+                    '<div class="ui-history-close fa fa-close fa-fw" data-toggle="modal" data-target=".delete-history-modal"></div>' +
                     '<div class="content">' +
                         '<h4 class="text"></h4>' +
                         '<p>' +
@@ -208,8 +208,8 @@ function historyCloseClick (e) {
   e.preventDefault()
   const id = $(this).closest('a').siblings('span').html()
   const value = historyList.get('id', id)[0]._values
-  $('.ui-delete-modal-msg').text('Do you really want to delete below history?')
-  $('.ui-delete-modal-item').html(`<i class="fa fa-file-text"></i> ${value.text}<br><i class="fa fa-clock-o"></i> ${value.time}`)
+  $('.ui-delete-history-modal-msg').text('Do you really want to delete below history?')
+  $('.ui-delete-history-modal-item').html(`<i class="fa fa-file-text"></i> ${value.text}<br><i class="fa fa-clock-o"></i> ${value.time}`)
   clearHistory = false
   deleteId = id
 }
@@ -277,7 +277,7 @@ function deleteHistory () {
           checkHistoryList()
         }
       }
-      $('.delete-modal').modal('hide')
+      $('.delete-history-modal').modal('hide')
       deleteId = null
       clearHistory = false
     })
@@ -297,12 +297,12 @@ function deleteHistory () {
         deleteId = null
       })
     }
-    $('.delete-modal').modal('hide')
+    $('.delete-history-modal').modal('hide')
     clearHistory = false
   })
 }
 
-$('.ui-delete-modal-confirm').click(() => {
+$('.ui-delete-history-modal-confirm').click(() => {
   deleteHistory()
 })
 
@@ -342,8 +342,8 @@ $('.ui-open-history').bind('change', e => {
 })
 
 $('.ui-clear-history').click(() => {
-  $('.ui-delete-modal-msg').text('Do you really want to clear all history?')
-  $('.ui-delete-modal-item').html('There is no turning back.')
+  $('.ui-delete-history-modal-msg').text('Do you really want to clear all history?')
+  $('.ui-delete-history-modal-item').html('There is no turning back.')
   clearHistory = true
   deleteId = null
 })
@@ -371,6 +371,10 @@ $('.ui-refresh-history').click(() => {
   })
 })
 
+$('.ui-delete-user-modal-cancel').click(() => {
+  $('.ui-delete-user').parent().removeClass('active')
+})
+
 $('.ui-logout').click(() => {
   clearLoginState()
   location.href = `${serverurl}/logout`
diff --git a/public/views/index/body.ejs b/public/views/index/body.ejs
index 122335a4..220e0dae 100644
--- a/public/views/index/body.ejs
+++ b/public/views/index/body.ejs
@@ -27,6 +27,8 @@
                                     </button>
                                     <ul class="dropdown-menu" aria-labelledby="profileLabel">
                                         <li><a href="<%- url %>/features"><i class="fa fa-dot-circle-o fa-fw"></i> <%= __('Features') %></a></li>
+                                        <li><a href="<%- url %>/me/export"><i class="fa fa-cloud-download fa-fw"></i> <%= __('Export user data') %></a></li>
+                                        <li><a class="ui-delete-user" data-toggle="modal" data-target=".delete-user-modal"><i class="fa fa-trash fa-fw"></i> <%= __('Delete user') %></a></li>
                                         <li><a href="<%- url %>/logout"><i class="fa fa-sign-out fa-fw"></i> <%= __('Sign Out') %></a></li>
                                     </ul>
                                 </span>
@@ -108,7 +110,7 @@
                         <span class="btn btn-default btn-file ui-open-history" title="<%= __('Import history') %>">
                             <i class="fa fa-folder-open-o"></i><input type="file" />
                         </span>
-                    <a href="#" class="btn btn-default ui-clear-history" title="<%= __('Clear history') %>" data-toggle="modal" data-target=".delete-modal"><i class="fa fa-trash-o"></i></a>
+                    <a href="#" class="btn btn-default ui-clear-history" title="<%= __('Clear history') %>" data-toggle="modal" data-target=".delete-history-modal"><i class="fa fa-trash-o"></i></a>
                     </span>
                     <a href="#" class="btn btn-default ui-refresh-history" title="<%= __('Refresh history') %>"><i class="fa fa-refresh"></i></a>
                 </form>
@@ -148,7 +150,7 @@
                         <option value="ko">한국어</option>
                     </select>
                     <p>
-                        &copy; 2018 <a href="https://hackmd.io">HackMD</a> | <a href="<%- url %>/s/release-notes" target="_blank"><%= __('Releases') %></a>
+                        &copy; 2018 <a href="https://hackmd.io">HackMD</a> | <a href="<%- url %>/s/release-notes" target="_blank"><%= __('Releases') %></a><% if(privacyStatement) { %> | <a href="<%- url %>/s/privacy" target="_blank"><%= __('Privacy') %></a><% } %><% if(termsOfUse) { %> | <a href="<%- url %>/s/terms-of-use" target="_blank"><%= __('Terms of Use') %></a><% } %>
                     </p>
                     <h6 class="social-foot">
                         <%- __('Follow us on %s and %s.', '<a href="https://github.com/hackmdio/HackMD" target="_blank"><i class="fa fa-github"></i> GitHub</a>, <a href="https://twitter.com/hackmdio" target="_blank"><i class="fa fa-twitter"></i> Twitter</a>', '<a href="https://www.facebook.com/hackmdio" target="_blank"><i class="fa fa-facebook-square"></i> Facebook</a>') %>
@@ -158,8 +160,8 @@
         </div>
     </div>
 </div>
-<!-- delete modal -->
-<div class="modal fade delete-modal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true">
+<!-- delete history modal -->
+<div class="modal fade delete-history-modal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true">
     <div class="modal-dialog modal-sm">
         <div class="modal-content">
             <div class="modal-header">
@@ -168,12 +170,32 @@
                 <h4 class="modal-title" id="myModalLabel"><%= __('Are you sure?') %></h4>
             </div>
             <div class="modal-body" style="color:black;">
-                <h5 class="ui-delete-modal-msg"></h5>
-                <strong class="ui-delete-modal-item"></strong>
+                <h5 class="ui-delete-history-modal-msg"></h5>
+                <strong class="ui-delete-history-modal-item"></strong>
             </div>
             <div class="modal-footer">
                 <button type="button" class="btn btn-default" data-dismiss="modal"><%= __('Cancel') %></button>
-                <button type="button" class="btn btn-danger ui-delete-modal-confirm"><%= __('Yes, do it!') %></button>
+                <button type="button" class="btn btn-danger ui-delete-history-modal-confirm"><%= __('Yes, do it!') %></button>
+            </div>
+        </div>
+    </div>
+</div>
+<!-- delete user modal -->
+<div class="modal fade delete-user-modal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true">
+    <div class="modal-dialog modal-sm">
+        <div class="modal-content">
+            <div class="modal-header">
+                <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">&times;</span>
+                </button>
+                <h4 class="modal-title" id="myModalLabel"><%= __('Are you sure?') %></h4>
+            </div>
+            <div class="modal-body" style="color:black;">
+                <h5 class="ui-delete-user-modal-msg"><%= __('Do you really want to delete your user account?') %></h5>
+                <strong class="ui-delete-user-modal-item"><%= __('This will delete your account, all notes that are owned by you and remove all references to your account from other notes.') %></strong>
+            </div>
+            <div class="modal-footer">
+                <button type="button" class="btn btn-default ui-delete-user-modal-cancel" data-dismiss="modal"><%= __('Cancel') %></button>
+                <a type="button" class="btn btn-danger" href="<%- url %>/me/delete/<%- deleteToken %>"><%= __('Yes, do it!') %></a>
             </div>
         </div>
     </div>