From 10a3973cba0d650217f88b3f5317da20254d8c6b Mon Sep 17 00:00:00 2001
From: Davor Spasovski <davor@spasovski.net>
Date: Mon, 6 Feb 2017 13:39:46 -0500
Subject: [PATCH] add compare query version support (re #7)

---
 .../pages/queries/compare-query-dialog.css    |   54 +
 .../pages/queries/compare-query-dialog.html   |   33 +
 .../app/pages/queries/compare-query-dialog.js |   52 +
 client/app/pages/queries/query.html           |    4 +
 client/app/pages/queries/view.js              |   15 +
 npm-shrinkwrap.json                           | 3095 +++++++++++++++++
 package.json                                  |    1 +
 redash/handlers/api.py                        |    9 +-
 redash/handlers/dashboards.py                 |    1 +
 redash/handlers/queries.py                    |   15 +
 redash/models.py                              |   40 +-
 tests/handlers/test_queries.py                |   27 +
 tests/models/test_changes.py                  |   13 +-
 tests/test_models.py                          |    3 +-
 14 files changed, 3331 insertions(+), 31 deletions(-)
 create mode 100644 client/app/pages/queries/compare-query-dialog.css
 create mode 100644 client/app/pages/queries/compare-query-dialog.html
 create mode 100644 client/app/pages/queries/compare-query-dialog.js
 create mode 100644 npm-shrinkwrap.json

diff --git a/client/app/pages/queries/compare-query-dialog.css b/client/app/pages/queries/compare-query-dialog.css
new file mode 100644
index 0000000000..ce2d01370e
--- /dev/null
+++ b/client/app/pages/queries/compare-query-dialog.css
@@ -0,0 +1,54 @@
+/* Compare Query Version container */
+/* Offers slight visual improvement (alignment) to modern UAs */
+.compare-query-version {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+}
+
+.diff-removed {
+  background-color: rgba(208, 2, 27, 0.3);
+}
+
+.diff-added {
+  background-color: rgba(65, 117, 5, 0.3);
+}
+
+.query-diff-container span {
+  display: inline-block;
+  border-radius: 3px;
+  line-height: 20px;
+  vertical-align: middle;
+  margin: 0 5px 0 0;
+}
+
+.query-diff-container > div:not(.compare-query-version-controls) {
+  float: left;
+  width: calc(50% - 5px);
+  margin: 0 10px 0 0;
+}
+
+.compare-query-version {
+  background-color: #f5f5f5;
+  padding: 5px;
+  border: 1px solid #ccc;
+  margin-right: 15px;
+  border-radius: 3px;
+}
+
+.diff-content {
+  border: 1px solid #ccc;
+  background-color: #f5f5f5;
+  border-radius: 3px;
+  padding: 15px;
+}
+
+.query-diff-container > div:last-child {
+  margin: 0;
+}
+
+.compare-query-version-controls {
+  display: flex;
+  align-items: center;
+  margin-bottom: 25px;
+}
diff --git a/client/app/pages/queries/compare-query-dialog.html b/client/app/pages/queries/compare-query-dialog.html
new file mode 100644
index 0000000000..5214046055
--- /dev/null
+++ b/client/app/pages/queries/compare-query-dialog.html
@@ -0,0 +1,33 @@
+<div class="modal-header">
+    <button type="button" class="close" aria-label="Close" ng-click="$ctrl.close()">
+        <span aria-hidden="true">&times;</span>
+    </button>
+    <h4 class="modal-title">Compare Query</h4>
+</div>
+<div class="modal-body query-diff-container">
+    <div class="compare-query-version-controls">
+        <div class="compare-query-version">
+            <span>Compare current version to</span>
+            <select id="version-choice" ng-model="compareQueryVersion" ng-change="$ctrl.compareQueries()">
+                <option ng-repeat="version in $ctrl.versions.slice(0, $ctrl.versions.length-1)" value="{{version.object_version}}">Version {{version.object_version}}</option>
+            </select>
+        </div>
+        <div class="compare-query-revert-wrapper hidden"><a ng-click="$ctrl.revertQuery()" class="btn btn-default">Revert to version {{$ctrl.previousQueryVersion + 1}}</a></div>
+    </div>
+    <div>
+        <h5>Current Version {{$ctrl.currentQuery.version}}</h5>
+        <div class="diff-content">
+            <p id="current-query-diff">
+                <span ng-class="{'diff-added': part.added, 'diff-removed': part.removed}" ng-repeat="part in $ctrl.currentDiff">
+                    {{part.value}}
+                </span>
+            </p>
+        </div>
+    </div>
+    <div>
+        <h5>Previous Version {{$ctrl.previousQueryVersion + 1}}</h5>
+        <div class="diff-content">
+            <p>{{$ctrl.previousQuery}}</p>
+        </div>
+    </div>
+</div>
diff --git a/client/app/pages/queries/compare-query-dialog.js b/client/app/pages/queries/compare-query-dialog.js
new file mode 100644
index 0000000000..bdb5c4d97e
--- /dev/null
+++ b/client/app/pages/queries/compare-query-dialog.js
@@ -0,0 +1,52 @@
+import * as jsDiff from 'diff';
+import template from './compare-query-dialog.html';
+import './compare-query-dialog.css';
+
+const CompareQueryDialog = {
+  controller: ['clientConfig', '$http', function doCompare(clientConfig, $http) {
+    this.currentQuery = this.resolve.query;
+
+    this.previousQuery = '';
+    this.currentDiff = [];
+    this.previousDiff = [];
+    this.versions = [];
+    this.previousQueryVersion = this.currentQuery.version - 2; // due to 0-indexed versions[]
+
+    this.compareQueries = (isInitialLoad) => {
+      if (!isInitialLoad) {
+        this.previousQueryVersion = document.getElementById('version-choice').value - 1; // due to 0-indexed versions[]
+      }
+
+      this.previousQuery = this.versions[this.previousQueryVersion].change.query.current;
+      this.currentDiff = jsDiff.diffChars(this.previousQuery, this.currentQuery.query);
+      document.querySelector('.compare-query-revert-wrapper').classList.remove('hidden');
+    };
+
+    this.revertQuery = () => {
+      this.resolve.query.query = this.previousQuery;
+      this.resolve.saveQuery();
+
+      // Close modal.
+      this.dismiss();
+    };
+
+    $http.get(`/api/queries/${this.currentQuery.id}/version`).then((response) => {
+      this.versions = response.data;
+      this.compareQueries(true);
+    });
+  }],
+  scope: {
+    query: '=',
+    saveQuery: '<',
+  },
+  bindings: {
+    resolve: '<',
+    close: '&',
+    dismiss: '&',
+  },
+  template,
+};
+
+export default function (ngModule) {
+  ngModule.component('compareQueryDialog', CompareQueryDialog);
+}
diff --git a/client/app/pages/queries/query.html b/client/app/pages/queries/query.html
index b6d9e1de24..cecfd12e3b 100644
--- a/client/app/pages/queries/query.html
+++ b/client/app/pages/queries/query.html
@@ -125,12 +125,16 @@ <h3>
                     <li ng-if="!query.is_archived && query.id != undefined && (isQueryOwner || currentUser.hasPermission('admin')) && showPermissionsControl"><a ng-click="showManagePermissionsModal()">Manage Permissions</a></li>
                     <li ng-if="!query.is_draft && query.id != undefined && (isQueryOwner || currentUser.hasPermission('admin'))"><a ng-click="togglePublished()">Unpublish Query</a></li>
                     <li ng-if="query.id != undefined"><a ng-click="showApiKey()">Show API Key</a></li>
+                    <li ng-if="query.id && (isQueryOwner || currentUser.hasPermission('admin'))">
+                      <a ng-click="compareQueryVersion()">Query Versions</a>
+                    </li>
                   </ul>
                 </div>
               </div>
             </div>
             <p style="height:calc(100% - 40px);">
               <query-editor query="query"
+                            id="query-source"
                             schema="schema"
                             syntax="dataSource.syntax"></query-editor>
             </p>
diff --git a/client/app/pages/queries/view.js b/client/app/pages/queries/view.js
index 8c26993694..eb4bb006a5 100644
--- a/client/app/pages/queries/view.js
+++ b/client/app/pages/queries/view.js
@@ -267,6 +267,21 @@ function QueryViewCtrl(
     $location.hash(visualization.id);
   };
 
+  $scope.compareQueryVersion = () => {
+    if (!$scope.query.query) {
+      return;
+    }
+
+    $uibModal.open({
+      windowClass: 'modal-xl',
+      component: 'compareQueryDialog',
+      resolve: {
+        query: $scope.query,
+        saveQuery: () => $scope.saveQuery,
+      },
+    });
+  };
+
   $scope.$watch('query.name', () => {
     Title.set($scope.query.name);
   });
diff --git a/npm-shrinkwrap.json b/npm-shrinkwrap.json
new file mode 100644
index 0000000000..3e2d5e1fbc
--- /dev/null
+++ b/npm-shrinkwrap.json
@@ -0,0 +1,3095 @@
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+  "name": "redash-client",
+  "version": "1.0.0",
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+    },
+    "3d-view-controls": {
+      "version": "2.1.1",
+      "from": "3d-view-controls@>=2.0.0 <3.0.0",
+      "resolved": "https://registry.npmjs.org/3d-view-controls/-/3d-view-controls-2.1.1.tgz"
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+    },
+    "yargs": {
+      "version": "3.10.0",
+      "from": "yargs@>=3.10.0 <3.11.0",
+      "resolved": "https://registry.npmjs.org/yargs/-/yargs-3.10.0.tgz"
+    },
+    "zero-crossings": {
+      "version": "1.0.1",
+      "from": "zero-crossings@>=1.0.0 <2.0.0",
+      "resolved": "https://registry.npmjs.org/zero-crossings/-/zero-crossings-1.0.1.tgz"
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+}
diff --git a/package.json b/package.json
index b2092e14db..bf58031aaa 100644
--- a/package.json
+++ b/package.json
@@ -42,6 +42,7 @@
     "d3": "^3.5.17",
     "d3-cloud": "^1.2.4",
     "debug": "^3.1.0",
+    "diff": "^3.3.0",
     "font-awesome": "^4.7.0",
     "jquery": "^3.2.1",
     "jquery-ui": "^1.12.1",
diff --git a/redash/handlers/api.py b/redash/handlers/api.py
index 0e1003c7e6..db77b43241 100644
--- a/redash/handlers/api.py
+++ b/redash/handlers/api.py
@@ -6,10 +6,13 @@
 from redash.handlers.base import org_scoped_rule
 from redash.handlers.permissions import ObjectPermissionsListResource, CheckPermissionResource
 from redash.handlers.alerts import AlertResource, AlertListResource, AlertSubscriptionListResource, AlertSubscriptionResource
-from redash.handlers.dashboards import DashboardListResource, RecentDashboardsResource, DashboardResource, DashboardShareResource, PublicDashboardResource 
+from redash.handlers.dashboards import DashboardListResource, RecentDashboardsResource, DashboardResource, DashboardShareResource, PublicDashboardResource
 from redash.handlers.data_sources import DataSourceTypeListResource, DataSourceListResource, DataSourceSchemaResource, DataSourceResource, DataSourcePauseResource, DataSourceTestResource
 from redash.handlers.events import EventResource
-from redash.handlers.queries import QueryForkResource, QueryRefreshResource, QueryListResource, QueryRecentResource, QuerySearchResource, QueryResource, MyQueriesResource
+from redash.handlers.queries import (
+    MyQueriesResource, QueryForkResource, QueryListResource,
+    QueryRecentResource, QueryRefreshResource, QueryResource,
+    QuerySearchResource, QueryVersionListResource, ChangeResource)
 from redash.handlers.query_results import QueryResultListResource, QueryResultResource, JobResource
 from redash.handlers.users import UserResource, UserListResource, UserInviteResource, UserResetPasswordResource
 from redash.handlers.visualizations import VisualizationListResource
@@ -73,6 +76,8 @@ def json_representation(data, code, headers=None):
 api.add_org_resource(QueryRefreshResource, '/api/queries/<query_id>/refresh', endpoint='query_refresh')
 api.add_org_resource(QueryResource, '/api/queries/<query_id>', endpoint='query')
 api.add_org_resource(QueryForkResource, '/api/queries/<query_id>/fork', endpoint='query_fork')
+api.add_org_resource(QueryVersionListResource, '/api/queries/<query_id>/version', endpoint='query_versions')
+api.add_org_resource(ChangeResource, '/api/changes/<change_id>', endpoint='changes')
 
 api.add_org_resource(ObjectPermissionsListResource, '/api/<object_type>/<object_id>/acl', endpoint='object_permissions')
 api.add_org_resource(CheckPermissionResource, '/api/<object_type>/<object_id>/acl/<access_type>', endpoint='check_permissions')
diff --git a/redash/handlers/dashboards.py b/redash/handlers/dashboards.py
index 21564e05ee..79f352bdff 100644
--- a/redash/handlers/dashboards.py
+++ b/redash/handlers/dashboards.py
@@ -57,6 +57,7 @@ def post(self):
                                      user=self.current_user,
                                      is_draft=True,
                                      layout='[]')
+        dashboard.record_changes(changed_by=self.current_user)
         models.db.session.add(dashboard)
         models.db.session.commit()
         return dashboard.to_dict()
diff --git a/redash/handlers/queries.py b/redash/handlers/queries.py
index aa3daa9bd4..8215c6dea6 100644
--- a/redash/handlers/queries.py
+++ b/redash/handlers/queries.py
@@ -124,6 +124,7 @@ def post(self):
         query_def['org'] = self.current_org
         query_def['is_draft'] = True
         query = models.Query.create(**query_def)
+        query.record_changes(changed_by=self.current_user)
         models.db.session.add(query)
         models.db.session.commit()
 
@@ -207,6 +208,7 @@ def post(self, query_id):
 
         try:
             self.update_model(query, query_def)
+            query.record_changes(self.current_user)
             models.db.session.commit()
         except StaleDataError:
             abort(409)
@@ -280,3 +282,16 @@ def post(self, query_id):
         parameter_values = collect_parameters_from_request(request.args)
 
         return run_query(query.data_source, parameter_values, query.query_text, query.id)
+
+
+class QueryVersionListResource(BaseResource):
+    @require_permission('view_query')
+    def get(self, query_id):
+        results = models.Change.list_versions(models.Query.get_by_id(query_id))
+        return [q.to_dict() for q in results]
+
+
+class ChangeResource(BaseResource):
+    @require_permission('view_query')
+    def get(self, change_id):
+        return models.Change.query.get(change_id).to_dict()
diff --git a/redash/models.py b/redash/models.py
index ecb1ed8bef..9675838a14 100644
--- a/redash/models.py
+++ b/redash/models.py
@@ -178,10 +178,6 @@ class ChangeTrackingMixin(object):
     skipped_fields = ('id', 'created_at', 'updated_at', 'version')
     _clean_values = None
 
-    def __init__(self, *a, **kw):
-        super(ChangeTrackingMixin, self).__init__(*a, **kw)
-        self.record_changes(self.user)
-
     def prep_cleanvalues(self):
         self.__dict__['_clean_values'] = {}
         for attr in inspect(self.__class__).column_attrs:
@@ -192,10 +188,10 @@ def prep_cleanvalues(self):
     def __setattr__(self, key, value):
         if self._clean_values is None:
             self.prep_cleanvalues()
-        for attr in inspect(self.__class__).column_attrs:
-            col, = attr.columns
-            previous = getattr(self, attr.key, None)
-            self._clean_values[col.name] = previous
+
+        if key in inspect(self.__class__).column_attrs:
+            previous = getattr(self, key, None)
+            self._clean_values[key] = previous
 
         super(ChangeTrackingMixin, self).__setattr__(key, value)
 
@@ -206,13 +202,19 @@ def record_changes(self, changed_by):
         for attr in inspect(self.__class__).column_attrs:
             col, = attr.columns
             if attr.key not in self.skipped_fields:
-                changes[col.name] = {'previous': self._clean_values[col.name],
-                                     'current': getattr(self, attr.key)}
+                prev = self._clean_values[col.name]
+                current = getattr(self, attr.key)
+                if prev != current:
+                    changes[col.name] = {'previous': prev, 'current': current}
 
-        db.session.add(Change(object=self,
-                              object_version=self.version,
-                              user=changed_by,
-                              change=changes))
+        if changes:
+            self.version = (self.version or 0) + 1
+            change = Change(object=self,
+                            object_version=self.version,
+                            user=changed_by,
+                            change=changes)
+            db.session.add(change)
+            return change
 
 
 class BelongsToOrgMixin(object):
@@ -807,7 +809,7 @@ def should_schedule_next(previous_iteration, now, schedule, failures):
 
 class Query(ChangeTrackingMixin, TimestampMixin, BelongsToOrgMixin, db.Model):
     id = Column(db.Integer, primary_key=True)
-    version = Column(db.Integer, default=1)
+    version = Column(db.Integer, default=0)
     org_id = Column(db.Integer, db.ForeignKey('organizations.id'))
     org = db.relationship(Organization, backref="queries")
     data_source_id = Column(db.Integer, db.ForeignKey("data_sources.id"), nullable=True)
@@ -1013,6 +1015,7 @@ def fork(self, user):
         kwargs = {a: getattr(self, a) for a in forked_list}
         forked_query = Query.create(name=u'Copy of (#{}) {}'.format(self.id, self.name),
                                     user=user, **kwargs)
+        forked_query.record_changes(changed_by=user)
 
         for v in self.visualizations:
             if v.type == 'TABLE':
@@ -1141,7 +1144,6 @@ def to_dict(self, full=True):
             'id': self.id,
             'object_id': self.object_id,
             'object_type': self.object_type,
-            'change_type': self.change_type,
             'object_version': self.object_version,
             'change': self.change,
             'created_at': self.created_at
@@ -1161,6 +1163,12 @@ def last_change(cls, obj):
             cls.object_type == obj.__class__.__tablename__).order_by(
                 cls.object_version.desc()).first()
 
+    @classmethod
+    def list_versions(cls, query):
+        return cls.query.filter(
+            cls.object_id == query.id,
+            cls.object_type == 'queries')
+
 
 class Alert(TimestampMixin, db.Model):
     UNKNOWN_STATE = 'unknown'
diff --git a/tests/handlers/test_queries.py b/tests/handlers/test_queries.py
index 0092045b26..8853f25b4a 100644
--- a/tests/handlers/test_queries.py
+++ b/tests/handlers/test_queries.py
@@ -183,3 +183,30 @@ def test_must_have_full_access_to_data_source(self):
         rv = self.make_request('post', '/api/queries/{}/fork'.format(query.id))
 
         self.assertEqual(rv.status_code, 403)
+
+
+class ChangeResourceTests(BaseTestCase):
+    def test_list(self):
+        query = self.factory.create_query()
+        query.name = 'version A'
+        query.record_changes(self.factory.user)
+        query.name = 'version B'
+        query.record_changes(self.factory.user)
+        rv = self.make_request('get', '/api/queries/{0}/version'.format(query.id))
+        self.assertEquals(rv.status_code, 200)
+        self.assertEquals(len(rv.json), 2)
+        self.assertEquals(rv.json[0]['change']['name']['current'], 'version A')
+        self.assertEquals(rv.json[1]['change']['name']['current'], 'version B')
+
+    def test_get(self):
+        query = self.factory.create_query()
+        query.name = 'version A'
+        ch1 = query.record_changes(self.factory.user)
+        query.name = 'version B'
+        ch2 = query.record_changes(self.factory.user)
+        rv1 = self.make_request('get', '/api/changes/' + str(ch1.id))
+        self.assertEqual(rv1.status_code, 200)
+        self.assertEqual(rv1.json['change']['name']['current'], 'version A')
+        rv2 = self.make_request('get', '/api/changes/' + str(ch2.id))
+        self.assertEqual(rv2.status_code, 200)
+        self.assertEqual(rv2.json['change']['name']['current'], 'version B')
diff --git a/tests/models/test_changes.py b/tests/models/test_changes.py
index 124e17a30d..3d7c7496e8 100644
--- a/tests/models/test_changes.py
+++ b/tests/models/test_changes.py
@@ -56,23 +56,12 @@ def test_properly_log_modification(self):
         obj.record_changes(changed_by=self.factory.user)
         obj.name = 'Query 2'
         obj.description = 'description'
-        db.session.flush()
         obj.record_changes(changed_by=self.factory.user)
 
         change = Change.last_change(obj)
 
         self.assertIsNotNone(change)
-        # TODO: https://github.com/getredash/redash/issues/1550
-        # self.assertEqual(change.object_version, 2)
+        self.assertEqual(change.object_version, 2)
         self.assertEqual(change.object_version, obj.version)
         self.assertIn('name', change.change)
         self.assertIn('description', change.change)
-
-    def test_logs_create_method(self):
-        q = Query(name='Query', description='', query_text='',
-                  user=self.factory.user, data_source=self.factory.data_source,
-                  org=self.factory.org)
-        change = Change.last_change(q)
-
-        self.assertIsNotNone(change)
-        self.assertEqual(q.user, change.user)
diff --git a/tests/test_models.py b/tests/test_models.py
index 2d33357d3b..ab47e664e8 100644
--- a/tests/test_models.py
+++ b/tests/test_models.py
@@ -180,7 +180,8 @@ def test_failure_extends_schedule(self):
         Execution failures recorded for a query result in exponential backoff
         for scheduling future execution.
         """
-        query = self.factory.create_query(schedule="60", schedule_failures=4)
+        query = self.factory.create_query(schedule="60")
+        query.schedule_failures = 4
         retrieved_at = utcnow() - datetime.timedelta(minutes=16)
         query_result = self.factory.create_query_result(
             retrieved_at=retrieved_at, query_text=query.query_text,