From a90618f406f0336e5888f9835bae1d8b4fa847dd Mon Sep 17 00:00:00 2001
From: Chaoyi Zha <summermontreal@gmail.com>
Date: Fri, 21 Apr 2017 17:32:30 -0400
Subject: [PATCH] Check for updates using GitHub rreleases API on the client
 side

---
 docs/user-guide/upgrading.md           |  8 ++--
 public/css/admin.css                   |  4 ++
 public/js/AdminCtrl.js                 | 57 +++++++++++++++++++++++++-
 resources/views/admin.blade.php        | 15 +++++++
 resources/views/layouts/base.blade.php |  3 ++
 5 files changed, 82 insertions(+), 5 deletions(-)

diff --git a/docs/user-guide/upgrading.md b/docs/user-guide/upgrading.md
index e55f288..ac3133f 100644
--- a/docs/user-guide/upgrading.md
+++ b/docs/user-guide/upgrading.md
@@ -5,10 +5,10 @@ To upgrade your Polr instance to the latest `master` or to a new release, you mu
 ## Upgrading from 2.x:
 
 - Back up your database and files
-- Update your files by using `git pull` or downloading a release
-- Run `composer install --no-dev -o` to ensure dependencies are up to date
-- Migrate database with `php artisan migrate` to ensure database structure is up to date
+- Update your files using `git pull` or `git checkout <version_tag>` (e.g `git checkout 2.2.0`)
+- Run `composer install --no-dev -o` to ensure your dependencies are up to date
+- Migrate your database with `php artisan migrate` to ensure your table structure is up to date
 
 ## Upgrading from 1.x:
 
-There are breaking changes between 2.x and 1.x; it is not yet possible to automatically upgrade to 2.x.
+There are breaking changes between 2.x and 1.x, thus it is not yet possible to automatically upgrade from 1.x to 2.x.
diff --git a/public/css/admin.css b/public/css/admin.css
index b718f20..9f2275d 100644
--- a/public/css/admin.css
+++ b/public/css/admin.css
@@ -23,6 +23,10 @@
     display: none;
 }
 
+.update-status {
+    margin-left: 0.3em;
+}
+
 .api-quota {
     display: inline;
 }
diff --git a/public/js/AdminCtrl.js b/public/js/AdminCtrl.js
index cd0c606..432cc52 100644
--- a/public/js/AdminCtrl.js
+++ b/public/js/AdminCtrl.js
@@ -1,6 +1,11 @@
 polr.controller('AdminCtrl', function($scope, $compile) {
     $scope.state = {
-        showNewUserWell: false
+        showNewUserWell: false,
+        updates: {
+            statusClass: 'fa fa-spin fa-gear',
+            status: 'Checking for updates...',
+            newVersionAvailable: false
+        }
     };
     $scope.datatables = {};
 
@@ -70,6 +75,51 @@ polr.controller('AdminCtrl', function($scope, $compile) {
         }, datatables_config));
     };
 
+    $scope.compSemver = function(a, b) {
+        var pa = a.split('.');
+        var pb = b.split('.');
+        for (var i = 0; i < 3; i++) {
+            var na = Number(pa[i]);
+            var nb = Number(pb[i]);
+            if (na > nb) return 1;
+            if (nb > na) return -1;
+            if (!isNaN(na) && isNaN(nb)) return 1;
+            if (isNaN(na) && !isNaN(nb)) return -1;
+        }
+        return 0;
+    };
+
+    $scope.checkPolrUpdates = function() {
+        $.ajax({
+            url: 'https://api.github.com/repos/cydrobolt/polr/releases/latest',
+            method: 'GET',
+            dataType: 'json',
+            headers: null
+        }).done(function(data) {
+            console.log(data);
+            // Given the latest release, compare to currently installed release.
+            // Show a notice to admins if a newer version is available.
+            // https://developer.github.com/v3/repos/releases/#get-the-latest-release
+            var remoteVersion = data.tag_name; // e.g 2.2.0
+            var updateDescription = data.body; // detailed changelog
+
+            var compResult = $scope.compSemver(POLR_VERSION, remoteVersion);
+
+            if (compResult == 1) {
+                $scope.state.updates.statusClass = 'fa fa-gears';
+                $scope.state.updates.status = 'A new update is available: ' + data.name;
+                $scope.state.updates.newVersionAvailable = true;
+            }
+            else {
+                $scope.state.updates.statusClass = 'fa fa-check';
+                $scope.state.updates.status = 'You are running the latest version of Polr';
+            }
+        }).fail(function(error) {
+            alert('lmao it no work');
+        });
+
+    };
+
     // Append modals to Angular root
     $scope.appendModal = function(html, id) {
         id = esc_selector(id);
@@ -302,6 +352,11 @@ polr.controller('AdminCtrl', function($scope, $compile) {
         });
 
         $scope.initTables();
+
+        if (true) {
+            // FIXME should check if admin
+            $scope.checkPolrUpdates();
+        }
     };
 
     $scope.init();
diff --git a/resources/views/admin.blade.php b/resources/views/admin.blade.php
index 1940187..64be9ba 100644
--- a/resources/views/admin.blade.php
+++ b/resources/views/admin.blade.php
@@ -15,6 +15,7 @@
 
             @if ($role == $admin_role)
             <li role='presentation' class='admin-nav-item'><a href='#admin'>Admin</a></li>
+            <li role='presentation' class='admin-nav-item'><a href='#updates'>Updates <span id="updates-counter"></span></a></li>
             @endif
 
             @if ($api_active == 1)
@@ -85,8 +86,22 @@
                 @include('snippets.user_table', [
                     'table_id' => 'admin_users_table'
                 ])
+            </div>
+
+            <div role="tabpanel" class="tab-pane" id="updates">
+                <h3>Updates</h3>
+                <p>
+                    <i ng-class="state.updates.statusClass"></i>
+                    <span class="text-muted update-status" ng-bind="state.updates.status">Checking for updates...</span>
+                </p>
+                <p ng-if="state.updates.newVersionAvailable">
+                    To upgrade Polr, follow the instructions provided in the <a href="//docs.polr.me/en/latest/user-guide/upgrading/">upgrade guide</a>.
+                </p>
+
 
             </div>
+
+
             @endif
 
             @if ($api_active == 1)
diff --git a/resources/views/layouts/base.blade.php b/resources/views/layouts/base.blade.php
index 85d0ea2..c3a90c6 100644
--- a/resources/views/layouts/base.blade.php
+++ b/resources/views/layouts/base.blade.php
@@ -78,6 +78,9 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
             toastr["error"](`{{ str_replace('`', '\`', $error) }}`, "Error")
         @endforeach
     @endif
+
+    // Define Polr version
+    var POLR_VERSION = '{{ env('POLR_VERSION') }}';
     </script>
 
     @yield('js')