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diff --git a/collections/users.js b/collections/users.js
new file mode 100644
index 00000000..1dcccf12
--- /dev/null
+++ b/collections/users.js
@@ -0,0 +1,106 @@
+Users = Meteor.users;
+
+// Search a user in the complete server database by its name or username. This
+// is used for instance to add a new user to a board.
+var searchInFields = ['username', 'profile.name'];
+Users.initEasySearch(searchInFields, {
+  use: 'mongo-db',
+  returnFields: searchInFields
+});
+
+Users.helpers({
+  boards: function() {
+    return Boards.find({ userId: this._id });
+  },
+  starredBoards: function() {
+    var starredBoardIds = this.profile.starredBoards || [];
+    return Boards.find({_id: {$in: starredBoardIds}});
+  },
+  hasStarred: function(boardId) {
+    var starredBoardIds = this.profile.starredBoards || [];
+    return _.contains(starredBoardIds, boardId);
+  },
+  isBoardMember: function() {
+    var board = Boards.findOne(Session.get('currentBoard'));
+    return board && _.contains(_.pluck(board.members, 'userId'), this._id) &&
+                         _.where(board.members, {userId: this._id})[0].isActive;
+  },
+  isBoardAdmin: function() {
+    var board = Boards.findOne(Session.get('currentBoard'));
+    if (this.isBoardMember(board))
+      return _.where(board.members, {userId: this._id})[0].isAdmin;
+  }
+});
+
+Users.before.insert(function(userId, doc) {
+  doc.profile = {};
+
+  // connect profile.status default
+  doc.profile.status = 'offline';
+
+  // slugify to username
+  //doc.username = getSlug(doc.profile.name, '');
+});
+
+if (Meteor.isServer) {
+  // Each board document contains the de-normalized number of users that have
+  // starred it. If the user star or unstar a board, we need to update this
+  // counter.
+  // We need to run this code on the server only, otherwise the incrementation
+  // will be done twice.
+  Users.after.update(function(userId, user, fieldNames) {
+    // The `starredBoards` list is hosted on the `profile` field. If this
+    // field hasn't been modificated we don't need to run this hook.
+    if (! _.contains(fieldNames, 'profile'))
+      return;
+
+    // To calculate a diff of board starred ids, we get both the previous
+    // and the newly board ids list
+    var getStarredBoardsIds = function(doc) {
+      return doc.profile && doc.profile.starredBoards;
+    };
+    var oldIds = getStarredBoardsIds(this.previous);
+    var newIds = getStarredBoardsIds(user);
+
+    // The _.difference(a, b) method returns the values from a that are not in
+    // b. We use it to find deleted and newly inserted ids by using it in one
+    // direction and then in the other.
+    var incrementBoards = function(boardsIds, inc) {
+      _.forEach(boardsIds, function(boardId) {
+        Boards.update(boardId, {$inc: {stars: inc}});
+      });
+    };
+    incrementBoards(_.difference(oldIds, newIds), -1);
+    incrementBoards(_.difference(newIds, oldIds), +1);
+  });
+
+  // XXX i18n
+  Users.after.insert(function(userId, doc) {
+    var ExampleBoard = {
+      title: 'Welcome Board',
+      userId: doc._id,
+      permission: 'private'
+    };
+
+    // Insert the Welcome Board
+    Boards.insert(ExampleBoard, function(err, boardId) {
+
+      _.forEach(['Basics', 'Advanced'], function(title) {
+        var list = {
+          title: title,
+          boardId: boardId,
+          userId: ExampleBoard.userId,
+
+          // XXX Not certain this is a bug, but we except these fields get
+          // inserted by the Lists.before.insert collection-hook. Since this
+          // hook is not called in this case, we have to dublicate the logic and
+          // set them here.
+          archived: false,
+          createdAt: new Date()
+        };
+
+        Lists.insert(list);
+      });
+    });
+  });
+}