Enforce a consistent ES6 coding style

Replace the old (and broken) jshint + jscsrc by eslint and configure
it to support some of the ES6 features.

The command `eslint` currently has one error which is a bug that was
discovered by its static analysis and should be fixed (usage of a
dead object).

6 files changed, 92 insertions, 97 deletions

diff --git a/server/lib/utils.js b/server/lib/utils.js
index 56c87c0b..3e141f06 100644
--- a/server/lib/utils.js
+++ b/server/lib/utils.js
@@ -1,5 +1,5 @@
 allowIsBoardAdmin = function(userId, board) {
-  var admins = _.pluck(_.where(board.members, {isAdmin: true}), 'userId');
+  const admins = _.pluck(_.where(board.members, {isAdmin: true}), 'userId');
   return _.contains(admins, userId);
 };
 
diff --git a/server/migrations.js b/server/migrations.js
index e9b60ed9..05f5ff7d 100644
--- a/server/migrations.js
+++ b/server/migrations.js
@@ -11,35 +11,35 @@
 //
 // To prevent this bug we always have to disable the schema validation and
 // argument transformations. We generally use the shorthandlers defined below.
-var noValidate = {
+const noValidate = {
   validate: false,
   filter: false,
   autoConvert: false,
   removeEmptyStrings: false,
-  getAutoValues: false
+  getAutoValues: false,
 };
-var noValidateMulti = _.extend(noValidate, { multi: true });
+const noValidateMulti = { ...noValidate, multi: true };
 
-Migrations.add('board-background-color', function() {
-  var defaultColor = '#16A085';
+Migrations.add('board-background-color', () => {
+  const defaultColor = '#16A085';
   Boards.update({
     background: {
-      $exists: false
-    }
+      $exists: false,
+    },
   }, {
     $set: {
       background: {
         type: 'color',
-        color: defaultColor
-      }
-    }
+        color: defaultColor,
+      },
+    },
   }, noValidateMulti);
 });
 
-Migrations.add('lowercase-board-permission', function() {
-  _.forEach(['Public', 'Private'], function(permission) {
+Migrations.add('lowercase-board-permission', () => {
+  _.forEach(['Public', 'Private'], (permission) => {
     Boards.update(
-      { permission: permission },
+      { permission },
       { $set: { permission: permission.toLowerCase() } },
       noValidateMulti
     );
@@ -47,23 +47,23 @@ Migrations.add('lowercase-board-permission', function() {
 });
 
 // Security migration: see https://github.com/wekan/wekan/issues/99
-Migrations.add('change-attachments-type-for-non-images', function() {
-  var newTypeForNonImage = 'application/octet-stream';
-  Attachments.find().forEach(function(file) {
-    if (! file.isImage()) {
+Migrations.add('change-attachments-type-for-non-images', () => {
+  const newTypeForNonImage = 'application/octet-stream';
+  Attachments.find().forEach((file) => {
+    if (!file.isImage()) {
       Attachments.update(file._id, {
         $set: {
           'original.type': newTypeForNonImage,
-          'copies.attachments.type': newTypeForNonImage
-        }
+          'copies.attachments.type': newTypeForNonImage,
+        },
       }, noValidate);
     }
   });
 });
 
-Migrations.add('card-covers', function() {
-  Cards.find().forEach(function(card) {
-    var cover =  Attachments.findOne({ cardId: card._id, cover: true });
+Migrations.add('card-covers', () => {
+  Cards.find().forEach((card) => {
+    const cover =  Attachments.findOne({ cardId: card._id, cover: true });
     if (cover) {
       Cards.update(card._id, {$set: {coverId: cover._id}}, noValidate);
     }
@@ -71,54 +71,54 @@ Migrations.add('card-covers', function() {
   Attachments.update({}, {$unset: {cover: ''}}, noValidateMulti);
 });
 
-Migrations.add('use-css-class-for-boards-colors', function() {
-  var associationTable = {
+Migrations.add('use-css-class-for-boards-colors', () => {
+  const associationTable = {
     '#27AE60': 'nephritis',
     '#C0392B': 'pomegranate',
     '#2980B9': 'belize',
     '#8E44AD': 'wisteria',
     '#2C3E50': 'midnight',
-    '#E67E22': 'pumpkin'
+    '#E67E22': 'pumpkin',
   };
-  Boards.find().forEach(function(board) {
-    var oldBoardColor = board.background.color;
-    var newBoardColor = associationTable[oldBoardColor];
+  Boards.find().forEach((board) => {
+    const oldBoardColor = board.background.color;
+    const newBoardColor = associationTable[oldBoardColor];
     Boards.update(board._id, {
       $set: { color: newBoardColor },
-      $unset: { background: '' }
+      $unset: { background: '' },
     }, noValidate);
   });
 });
 
-Migrations.add('denormalize-star-number-per-board', function() {
-  Boards.find().forEach(function(board) {
-    var nStars = Users.find({'profile.starredBoards': board._id}).count();
+Migrations.add('denormalize-star-number-per-board', () => {
+  Boards.find().forEach((board) => {
+    const nStars = Users.find({'profile.starredBoards': board._id}).count();
     Boards.update(board._id, {$set: {stars: nStars}}, noValidate);
   });
 });
 
 // We want to keep a trace of former members so we can efficiently publish their
 // infos in the general board publication.
-Migrations.add('add-member-isactive-field', function() {
-  Boards.find({}, {fields: {members: 1}}).forEach(function(board) {
-    var allUsersWithSomeActivity = _.chain(
-      Activities.find({boardId: board._id}, {fields:{userId:1}}).fetch())
+Migrations.add('add-member-isactive-field', () => {
+  Boards.find({}, {fields: {members: 1}}).forEach((board) => {
+    const allUsersWithSomeActivity = _.chain(
+      Activities.find({ boardId: board._id }, { fields:{ userId:1 }}).fetch())
         .pluck('userId')
         .uniq()
         .value();
-    var currentUsers = _.pluck(board.members, 'userId');
-    var formerUsers = _.difference(allUsersWithSomeActivity, currentUsers);
+    const currentUsers = _.pluck(board.members, 'userId');
+    const formerUsers = _.difference(allUsersWithSomeActivity, currentUsers);
 
-    var newMemberSet = [];
-    _.forEach(board.members, function(member) {
+    const newMemberSet = [];
+    _.forEach(board.members, (member) => {
       member.isActive = true;
       newMemberSet.push(member);
     });
-    _.forEach(formerUsers, function(userId) {
+    _.forEach(formerUsers, (userId) => {
       newMemberSet.push({
-        userId: userId,
+        userId,
         isAdmin: false,
-        isActive: false
+        isActive: false,
       });
     });
     Boards.update(board._id, {$set: {members: newMemberSet}}, noValidate);
diff --git a/server/publications/activities.js b/server/publications/activities.js
index 5277206c..38c61ebf 100644
--- a/server/publications/activities.js
+++ b/server/publications/activities.js
@@ -1,24 +1,19 @@
-// We use activities fields at three different places:
-// 1. The home page that contains
-// 2. The board
-// 3.
-// We use publish paginate for these three publications.
+// We use activities fields at two different places:
+// 1. The board sidebar
+// 2. The card activity tab
+// We use this publication to paginate for these two publications.
 
-Meteor.publish('activities', function(mode, id, limit) {
-  check(mode, Match.Where(function(x) {
+Meteor.publish('activities', (kind, id, limit) => {
+  check(kind, Match.Where((x) => {
     return ['board', 'card'].indexOf(x) !== -1;
   }));
   check(id, String);
   check(limit, Number);
 
-  var selector = {};
-  if (mode === 'board')
-    selector.boardId = id;
-  else if (mode === 'card')
-    selector.cardId = id;
-
-  return Activities.find(selector, {
+  return Activities.find({
+    [`${kind}Id`]: id,
+  }, {
+    limit,
     sort: {createdAt: -1},
-    limit: limit
   });
 });
diff --git a/server/publications/boards.js b/server/publications/boards.js
index ae30357f..7f6a544b 100644
--- a/server/publications/boards.js
+++ b/server/publications/boards.js
@@ -5,20 +5,20 @@
 Meteor.publish('boards', function() {
   // Ensure that the user is connected. If it is not, we need to return an empty
   // array to tell the client to remove the previously published docs.
-  if (! Match.test(this.userId, String))
+  if (!Match.test(this.userId, String))
     return [];
 
   // Defensive programming to verify that starredBoards has the expected
   // format -- since the field is in the `profile` a user can modify it.
-  var starredBoards = Users.findOne(this.userId).profile.starredBoards || [];
+  const starredBoards = Users.findOne(this.userId).profile.starredBoards || [];
   check(starredBoards, [String]);
 
   return Boards.find({
     archived: false,
     $or: [
       { 'members.userId': this.userId },
-      { _id: { $in: starredBoards } }
-    ]
+      { _id: { $in: starredBoards } },
+    ],
   }, {
     fields: {
       _id: 1,
@@ -27,13 +27,13 @@ Meteor.publish('boards', function() {
       title: 1,
       color: 1,
       members: 1,
-      permission: 1
-    }
+      permission: 1,
+    },
   });
 });
 
 Meteor.publish('archivedBoards', function() {
-  if (! Match.test(this.userId, String))
+  if (!Match.test(this.userId, String))
     return [];
 
   return Boards.find({
@@ -41,23 +41,23 @@ Meteor.publish('archivedBoards', function() {
     members: {
       $elemMatch: {
         userId: this.userId,
-        isAdmin: true
-      }
-    }
+        isAdmin: true,
+      },
+    },
   }, {
     fields: {
       _id: 1,
       archived: 1,
       slug: 1,
-      title: 1
-    }
-  })
+      title: 1,
+    },
+  });
 });
 
 Meteor.publishComposite('board', function(boardId) {
   check(boardId, String);
   return {
-    find: function() {
+    find() {
       return Boards.find({
         _id: boardId,
         archived: false,
@@ -65,18 +65,18 @@ Meteor.publishComposite('board', function(boardId) {
         // it.
         $or: [
           { permission: 'public' },
-          { 'members.userId': this.userId }
-        ]
+          { 'members.userId': this.userId },
+        ],
       }, { limit: 1 });
     },
     children: [
       // Lists
       {
-        find: function(board) {
+        find(board) {
           return Lists.find({
-            boardId: board._id
+            boardId: board._id,
           });
-        }
+        },
       },
 
       // Cards and cards comments
@@ -103,48 +103,48 @@ Meteor.publishComposite('board', function(boardId) {
       // And in the meantime our code below works pretty well -- it's not even a
       // hack!
       {
-        find: function(board) {
+        find(board) {
           return Cards.find({
-            boardId: board._id
+            boardId: board._id,
           });
         },
 
         children: [
           // comments
           {
-            find: function(card) {
+            find(card) {
               return CardComments.find({
-                cardId: card._id
+                cardId: card._id,
               });
-            }
+            },
           },
           // Attachments
           {
-            find: function(card) {
+            find(card) {
               return Attachments.find({
-                cardId: card._id
+                cardId: card._id,
               });
-            }
-          }
-        ]
+            },
+          },
+        ],
       },
 
       // Board members. This publication also includes former board members that
       // aren't members anymore but may have some activities attached to them in
       // the history.
       {
-        find: function(board) {
+        find(board) {
           return Users.find({
-            _id: { $in: _.pluck(board.members, 'userId') }
+            _id: { $in: _.pluck(board.members, 'userId') },
           });
         },
         // Presence indicators
         children: [{
-          find: function(user) {
+          find(user) {
             return Presences.find({userId: user._id});
-          }
-        }]
-      }
-    ]
+          },
+        }],
+      },
+    ],
   };
 });
diff --git a/server/publications/cards.js b/server/publications/cards.js
index a9664095..c9abc421 100644
--- a/server/publications/cards.js
+++ b/server/publications/cards.js
@@ -1,4 +1,4 @@
-Meteor.publish('card', function(cardId) {
+Meteor.publish('card', (cardId) => {
   check(cardId, String);
   return Cards.find({ _id: cardId });
 });
diff --git a/server/publications/unsavedEdits.js b/server/publications/unsavedEdits.js
index ecc24646..264eba74 100644
--- a/server/publications/unsavedEdits.js
+++ b/server/publications/unsavedEdits.js
@@ -1,5 +1,5 @@
 Meteor.publish('unsaved-edits', function() {
   return UnsavedEditCollection.find({
-    userId: this.userId
+    userId: this.userId,
   });
 });