Add admin ability : Impersonate one user.

client/components/settings/peopleBody.jade

@@ -104,6 +104,8 @@ template(name="peopleRow")
       a.edit-user
         i.fa.fa-edit
         | {{_ 'edit'}}
+      a.more-settings-user
+        i.fa.fa-ellipsis-h
 
 template(name="editUserPopup")
   form
@@ -200,3 +202,10 @@ template(name="newUserPopup")
       input.js-profile-password(type="password")
     div.buttonsContainer
       input.primary.wide(type="submit" value="{{_ 'save'}}")
+
+template(name="settingsUserPopup")
+  ul.pop-over-list
+    li
+      a.impersonate-user
+        i.fa.fa-user
+        | {{_ 'impersonate-user'}}

client/components/settings/peopleBody.js

@@ -194,6 +194,7 @@ BlazeComponent.extendComponent({
     return [
       {
         'click a.edit-user': Popup.open('editUser'),
+        'click a.more-settings-user': Popup.open('settingsUser'),
       },
     ];
   },
@@ -343,3 +344,16 @@ Template.newUserPopup.events({
     Popup.close();
   },
 });
+
+Template.settingsUserPopup.events({
+  'click .impersonate-user'(event) {
+    event.preventDefault();
+
+    Meteor.call('impersonate', this.userId, err => {
+      if (!err) {
+        FlowRouter.go('/');
+        Meteor.connection.setUserId(this.userId);
+      }
+    });
+  },
+});

client/components/settings/peopleBody.styl

@@ -46,3 +46,6 @@ table
 
   div
     margin: auto
+
+.more-settings-user
+  margin-left: 10px;

models/users.js

@@ -905,6 +905,16 @@ if (Meteor.isServer) {
       }
       return { username: user.username, email: user.emails[0].address };
     },
+    impersonate(userId) {
+      check(userId, String);
+
+      if (!Meteor.users.findOne(userId))
+        throw new Meteor.Error(404, 'User not found');
+      if (!Meteor.user().isAdmin)
+        throw new Meteor.Error(403, 'Permission denied');
+
+      this.setUserId(userId);
+    },
   });
   Accounts.onCreateUser((options, user) => {
     const userCount = Users.find().count();