From 0533130de3e970c24c8d3654c89b29a8c147be5a Mon Sep 17 00:00:00 2001
From: Joseph Schorr <joseph.schorr@coreos.com>
Date: Wed, 15 Apr 2015 15:23:50 -0400
Subject: [PATCH 1/5] Fix NPE

---
 static/js/directives/repo-view/repo-panel-tags.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/static/js/directives/repo-view/repo-panel-tags.js b/static/js/directives/repo-view/repo-panel-tags.js
index 283ce2dde..cf2f25595 100644
--- a/static/js/directives/repo-view/repo-panel-tags.js
+++ b/static/js/directives/repo-view/repo-panel-tags.js
@@ -164,7 +164,7 @@ angular.module('quay').directive('repoPanelTags', function () {
                 'end_ts': tag.end_ts,
                 'time': currentTime,
                 'docker_image_id': imageId,
-                'old_docker_image_id': oldImageId
+                'old_docker_image_id': oldImageId || ''
               })
             }
 

From daa2ce19aa7ce69a36604ef8c3b68375cce8cbb5 Mon Sep 17 00:00:00 2001
From: Joseph Schorr <joseph.schorr@coreos.com>
Date: Wed, 15 Apr 2015 15:38:59 -0400
Subject: [PATCH 2/5] Fix typo

---
 static/directives/repo-view/repo-panel-tags.html | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/static/directives/repo-view/repo-panel-tags.html b/static/directives/repo-view/repo-panel-tags.html
index 575d91dcc..13f82ed80 100644
--- a/static/directives/repo-view/repo-panel-tags.html
+++ b/static/directives/repo-view/repo-panel-tags.html
@@ -140,7 +140,7 @@
       </td>
       <td>{{ tag.size | bytes }}</td>
       <td class="image-id-col">
-        <span class="image-link" repoository="repository" image-id="tag.image_id"></span>
+        <span class="image-link" repository="repository" image-id="tag.image_id"></span>
       </td>
       <td class="image-track" ng-repeat="it in imageTracks">
         <span class="image-track-dot" ng-if="it.image_id == tag.image_id"

From 20b399318eb31f1ec7826d2a46234f893b1c36fb Mon Sep 17 00:00:00 2001
From: Joseph Schorr <joseph.schorr@coreos.com>
Date: Wed, 15 Apr 2015 16:11:04 -0400
Subject: [PATCH 3/5] Fix off by one issue

---
 static/js/directives/repo-view/repo-panel-tags.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/static/js/directives/repo-view/repo-panel-tags.js b/static/js/directives/repo-view/repo-panel-tags.js
index cf2f25595..74e83847a 100644
--- a/static/js/directives/repo-view/repo-panel-tags.js
+++ b/static/js/directives/repo-view/repo-panel-tags.js
@@ -194,7 +194,7 @@ angular.module('quay').directive('repoPanelTags', function () {
             var next = tagData[i - 1];
 
             if (new Date(current.time).getDate() != new Date(next.time).getDate()) {
-              tagData.splice(i - 1, 0, {
+              tagData.splice(i, 0, {
                 'date_break': true,
                 'date': new Date(current.time)
               });

From 2a77bd2c9281eeeb5500a589dc0dd438d141b291 Mon Sep 17 00:00:00 2001
From: Joseph Schorr <joseph.schorr@coreos.com>
Date: Wed, 15 Apr 2015 18:39:05 -0400
Subject: [PATCH 4/5] - UI improvements in prep for adding undo ability - Move
 the tag history into its own directive and clean up the code

---
 .../directives/repo-view/repo-panel-tags.css  | 127 --------------
 static/css/directives/ui/repo-tag-history.css | 131 +++++++++++++++
 static/directives/repo-tag-history.html       |  45 +++++
 .../directives/repo-view/repo-panel-tags.html |  54 +-----
 .../directives/repo-view/repo-panel-tags.js   | 135 +--------------
 static/js/directives/ui/repo-tag-history.js   | 155 ++++++++++++++++++
 6 files changed, 335 insertions(+), 312 deletions(-)
 create mode 100644 static/css/directives/ui/repo-tag-history.css
 create mode 100644 static/directives/repo-tag-history.html
 create mode 100644 static/js/directives/ui/repo-tag-history.js

diff --git a/static/css/directives/repo-view/repo-panel-tags.css b/static/css/directives/repo-view/repo-panel-tags.css
index 1a81a5604..9df9c2679 100644
--- a/static/css/directives/repo-view/repo-panel-tags.css
+++ b/static/css/directives/repo-view/repo-panel-tags.css
@@ -68,131 +68,4 @@
 .repo-panel-tags-element .options-col .fa-download {
   color: #999;
   cursor: pointer;
-}
-
-.repo-panel-tags-element .history-list {
-  margin: 10px;
-  border-left: 2px solid #eee;
-}
-
-.repo-panel-tags-element .history-entry {
-  position:relative;
-  margin-top:  20px;
-  padding-left: 26px;
-
-  transition: all 350ms ease-in-out;
-}
-
-.repo-panel-tags-element .history-entry .history-text {
-  transition: transform 350ms ease-in-out, opacity 350ms ease-in-out;
-  overflow: hidden;
-  height: 40px;
-}
-
-.repo-panel-tags-element .history-entry.filtered-mismatch {
-  margin-top: 10px;
-}
-
-.repo-panel-tags-element .history-entry.filtered-mismatch .history-text {
-  height: 18px;
-  opacity: 0;
-}
-
-.repo-panel-tags-element .history-entry.filtered-mismatch .history-icon {
-  opacity: 0.5;
-  transform: scale(0.5, 0.5);
-}
-
-.repo-panel-tags-element .history-entry .history-date-break {
-  font-size: 16px;
-}
-
-.repo-panel-tags-element .history-entry .history-date-break:before {
-  content: "";
-  position: absolute;
-  border-radius: 50%;
-  width: 12px;
-  height: 12px;
-  background: #ccc;
-  top: 4px;
-  left: -7px;
-}
-
-.repo-panel-tags-element .history-entry .history-icon {
-  border-radius: 50%;
-  width: 32px;
-  height: 32px;
-  line-height: 33px;
-  text-align: center;
-  font-size: 20px;
-  color: white;
-  background: #ccc;
-
-  position: absolute;
-  left: -17px;
-  top: -4px;
-  display: inline-block;
-
-  transition: all 350ms ease-in-out;
-}
-
-.repo-panel-tags-element .history-entry.move .history-icon:before {
-  content: "\f061";
-  font-family: FontAwesome;
-}
-
-.repo-panel-tags-element .history-entry.create .history-icon:before {
-  content: "\f02b";
-  font-family: FontAwesome;
-}
-
-.repo-panel-tags-element .history-entry.delete .history-icon:before {
-  content: "\f014";
-  font-family: FontAwesome;
-}
-
-.repo-panel-tags-element .history-entry.move .history-icon {
-  background-color: #1f77b4;
-}
-
-.repo-panel-tags-element .history-entry.create .history-icon {
-  background-color: #98df8a;
-}
-
-.repo-panel-tags-element .history-entry.delete .history-icon {
-  background-color: #ff9896;
-}
-
-.repo-panel-tags-element .history-entry .history-icon .fa-tag {
-  margin-right: 0px;
-}
-
-.repo-panel-tags-element .history-entry .tag-span {
-  display: inline-block;
-  border-radius: 4px;
-  padding: 2px;
-  background: #eee;
-  padding-right: 6px;
-  color: black;
-  cursor: pointer;
-}
-
-.repo-panel-tags-element .history-entry .tag-span.checked {
-  background: #F6FCFF;
-}
-
-.repo-panel-tags-element .history-entry .tag-span:before {
-  content: "\f02b";
-  font-family: FontAwesome;
-  margin-left: 4px;
-  margin-right: 4px;
-}
-
-.repo-panel-tags-element .history-entry .history-description {
-  color: #777;
-}
-
-.repo-panel-tags-element .history-entry .history-datetime {
-  font-size: 12px;
-  color: #ccc;
 }
\ No newline at end of file
diff --git a/static/css/directives/ui/repo-tag-history.css b/static/css/directives/ui/repo-tag-history.css
new file mode 100644
index 000000000..7ee39b7bc
--- /dev/null
+++ b/static/css/directives/ui/repo-tag-history.css
@@ -0,0 +1,131 @@
+.repo-tag-history-element .history-list {
+  margin: 10px;
+  border-left: 2px solid #eee;
+  margin-right: 150px;
+}
+
+.repo-tag-history-element .history-entry {
+  position:relative;
+  margin-top:  20px;
+  padding-left: 26px;
+
+  transition: all 350ms ease-in-out;
+}
+
+.repo-tag-history-element .history-entry .history-text {
+  transition: transform 350ms ease-in-out, opacity 350ms ease-in-out;
+  overflow: hidden;
+  height: 40px;
+}
+
+.repo-tag-history-element .history-entry.filtered-mismatch {
+  margin-top: 10px;
+}
+
+.repo-tag-history-element .history-entry.filtered-mismatch .history-text {
+  height: 18px;
+  opacity: 0;
+}
+
+.repo-tag-history-element .history-entry.filtered-mismatch .history-icon {
+  opacity: 0.5;
+  transform: scale(0.5, 0.5);
+}
+
+.repo-tag-history-element .history-entry.filtered-mismatch.current .history-icon {
+  background-color: #ccc !important;
+}
+
+.repo-tag-history-element .history-entry .history-date-break {
+  font-size: 16px;
+}
+
+.repo-tag-history-element .history-entry .history-date-break:before {
+  content: "";
+  position: absolute;
+  border-radius: 50%;
+  width: 12px;
+  height: 12px;
+  background: #ccc;
+  top: 4px;
+  left: -7px;
+}
+
+.repo-tag-history-element .history-entry .history-icon {
+  position: absolute;
+  left: -17px;
+  top: -4px;
+
+  border-radius: 50%;
+  width: 32px;
+  height: 32px;
+  line-height: 32px;
+  text-align: center;
+  font-size: 20px;
+  color: white;
+  background: #ccc;
+
+  display: inline-block;
+  transition: all 350ms ease-in-out;
+}
+
+.repo-tag-history-element .history-entry.move .history-icon:before {
+  content: "\f061";
+  font-family: FontAwesome;
+}
+
+.repo-tag-history-element .history-entry.create .history-icon:before {
+  content: "\f02b";
+  font-family: FontAwesome;
+}
+
+.repo-tag-history-element .history-entry.delete .history-icon:before {
+  content: "\f014";
+  font-family: FontAwesome;
+}
+
+.repo-tag-history-element .history-entry.current.move .history-icon {
+  background-color: #77BFF0;
+}
+
+.repo-tag-history-element .history-entry.current.create .history-icon {
+  background-color: #98df8a;
+}
+
+.repo-tag-history-element .history-entry.current.delete .history-icon {
+  background-color: #ff9896;
+}
+
+.repo-tag-history-element .history-entry .history-icon .fa-tag {
+  margin-right: 0px;
+}
+
+.repo-tag-history-element .history-entry .tag-span {
+  display: inline-block;
+  border-radius: 4px;
+  padding: 2px;
+  background: #eee;
+  padding-right: 6px;
+  color: black;
+  cursor: pointer;
+}
+
+.repo-tag-history-element .history-entry .tag-span.checked {
+  background: #F6FCFF;
+}
+
+.repo-tag-history-element .history-entry .tag-span:before {
+  content: "\f02b";
+  font-family: FontAwesome;
+  margin-left: 4px;
+  margin-right: 4px;
+}
+
+.repo-tag-history-element .history-entry .history-description {
+  color: #777;
+}
+
+.repo-tag-history-element .history-entry .history-datetime {
+  font-size: 12px;
+  color: #ccc;
+}
\ No newline at end of file
diff --git a/static/directives/repo-tag-history.html b/static/directives/repo-tag-history.html
new file mode 100644
index 000000000..73bd1c6b2
--- /dev/null
+++ b/static/directives/repo-tag-history.html
@@ -0,0 +1,45 @@
+ <div class="repo-tag-history-element">
+   <div class="cor-loader" ng-if="!historyEntries"></div>
+
+   <span class="co-filter-box" style="float:right">
+    <input class="form-control" type="text" ng-model="filter" placeholder="Filter History...">
+   </span>
+
+   <div class="history-list">
+     <div class="empty" ng-if="!historyEntries.length">
+      <div class="empty-primary-msg">This repository is empty.</div>
+      <div class="empty-secondary-msg">Push a tag or initiate a build to populate this repository.</div>
+     </div>
+
+     <div class="history-entry" ng-repeat="entry in historyEntries"
+          ng-class="getEntryClasses(entry, filter)">
+        <div class="history-date-break" ng-if="entry.date_break">
+          {{ entry.date | amDateFormat:'dddd, MMMM Do YYYY' }}
+        </div>
+        <div ng-if="!entry.date_break">
+          <div class="history-icon-container"><div class="history-icon"></div></div>
+          <div class="history-text">
+            <div class="history-description">
+              <span class="tag-span"
+                    ng-click="showHistory(true, entry.tag_name)">{{ entry.tag_name }}</span>
+              <span ng-switch on="entry.action">
+                <span ng-switch-when="create">
+                  was created pointing to image <span class="image-link" repository="repository" image-id="entry.docker_image_id"></span>
+                </span>
+                <span ng-switch-when="delete">
+                  was deleted
+                </span>
+                <span ng-switch-when="move">
+                  was moved to image
+                  <span class="image-link" repository="repository" image-id="entry.docker_image_id"></span>
+                  from image
+                  <span class="image-link" repository="repository" image-id="entry.old_docker_image_id"></span>
+                </span>
+              </span>
+            </div>
+            <div class="history-datetime">{{ entry.time | amDateFormat:'dddd, MMMM Do YYYY, h:mm:ss a' }}</div>
+          </div>
+        </div>
+     </div>
+   </div>
+ </div>
\ No newline at end of file
diff --git a/static/directives/repo-view/repo-panel-tags.html b/static/directives/repo-view/repo-panel-tags.html
index 13f82ed80..9454d8f4e 100644
--- a/static/directives/repo-view/repo-panel-tags.html
+++ b/static/directives/repo-view/repo-panel-tags.html
@@ -1,5 +1,5 @@
 <div class="repo-panel-tags-element">
-  <div class="tab-header-controls">
+  <div class="tab-header-controls" ng-show="images">
     <div class="btn-group btn-group-sm" ng-show="repository.can_write">
       <button class="btn" ng-class="!showingHistory ? 'btn-primary active' : 'btn-default'" ng-click="showHistory(false)">
         <i class="fa fa-tags"></i>Current Tags
@@ -13,56 +13,8 @@
  <h3 class="tab-header">Repository Tags</h3>
 
  <!-- History view -->
- <div ng-show="showingHistory">
-   <div ng-show="showingHistory">
-     <div class="cor-loader" ng-if="!tagHistoryData"></div>
-   </div>
-
-   <div style="height: 40px;">
-     <span class="co-filter-box" style="float:right">
-      <input class="form-control" type="text" ng-model="options.historyFilter" placeholder="Filter History...">
-     </span>
-   </div>
-
-   <div class="history-list">
-     <div class="empty" ng-if="!tagHistoryData.length">
-      <div class="empty-primary-msg">This repository is empty.</div>
-      <div class="empty-secondary-msg">Push a tag or initiate a build to populate this repository.</div>
-     </div>
-
-     <div class="history-entry" ng-repeat="entry in tagHistoryData"
-          ng-class="getEntryClasses(entry, options.historyFilter)">
-        <div class="history-date-break" ng-if="entry.date_break">
-          {{ entry.date | amDateFormat:'dddd, MMMM Do YYYY' }}
-        </div>
-        <div ng-if="!entry.date_break">
-          <div class="history-icon"></div>
-          <div class="history-text">
-            <div class="history-description">
-              <span class="tag-span"
-                    ng-class="isChecked(entry.tag_name, checkedTags.checked) ? 'checked' : ''"
-                    ng-click="showHistory(true, entry.tag_name)">{{ entry.tag_name }}</span>
-              <span ng-switch on="entry.action">
-                <span ng-switch-when="create">
-                  was created pointing to image <span class="image-link" repository="repository" image-id="entry.docker_image_id"></span>
-                </span>
-                <span ng-switch-when="delete">
-                  was deleted
-                </span>
-                <span ng-switch-when="move">
-                  was moved to image
-                  <span class="image-link" repository="repository" image-id="entry.docker_image_id"></span>
-                  from image
-                  <span class="image-link" repository="repository" image-id="entry.old_docker_image_id"></span>
-                </span>
-              </span>
-            </div>
-            <div class="history-datetime">{{ entry.time | amDateFormat:'dddd, MMMM Do YYYY, h:mm:ss a' }}</div>
-          </div>
-        </div>
-     </div>
-   </div>
- </div>
+ <div class="repo-tag-history" repository="repository" filter="options.historyFilter"
+      is-enabled="showingHistory" ng-show="showingHistory"></div>
 
  <!-- Normal View -->
  <div class="resource-view" resource="imagesResource" error-message="'Could not load images'"
diff --git a/static/js/directives/repo-view/repo-panel-tags.js b/static/js/directives/repo-view/repo-panel-tags.js
index 74e83847a..3d0604503 100644
--- a/static/js/directives/repo-view/repo-panel-tags.js
+++ b/static/js/directives/repo-view/repo-panel-tags.js
@@ -119,136 +119,11 @@ angular.module('quay').directive('repoPanelTags', function () {
 
         // Process each of the tags.
         setTagState();
-
-        if ($scope.showingHistory) {
-          loadTimeline();
-        }
       });
 
-      var loadTimeline = function() {
-        var params = {
-          'repository': $scope.repository.namespace + '/' + $scope.repository.name
-        };
-
-        ApiService.listRepoTags(null, params).then(function(resp) {
-          var tagData = [];
-          var currentTags = {};
-
-          resp.tags.forEach(function(tag) {
-            var tagName = tag.name;
-            var imageId = tag.docker_image_id;
-            var oldImageId = null;
-
-            if (tag.end_ts) {
-              var action = 'delete';
-
-              // If the end time matches the existing start time for this tag, then this is a move
-              // instead of a delete.
-              var currentTime = tag.end_ts * 1000;
-              if (currentTags[tagName] && currentTags[tagName].start_ts == tag.end_ts) {
-                action = 'move';
-
-                // Remove the create.
-                var index = tagData.indexOf(currentTags[tagName]);
-                var createEntry = tagData.splice(index, 1)[0];
-
-                imageId = createEntry.docker_image_id;
-                oldImageId = tag.docker_image_id;
-              }
-
-              // Add the delete/move.
-              tagData.push({
-                'tag_name': tagName,
-                'action': action,
-                'start_ts': tag.start_ts,
-                'end_ts': tag.end_ts,
-                'time': currentTime,
-                'docker_image_id': imageId,
-                'old_docker_image_id': oldImageId || ''
-              })
-            }
-
-            if (tag.start_ts) {
-              var currentTime = tag.start_ts * 1000;
-              var create = {
-                'tag_name': tagName,
-                'action': 'create',
-                'start_ts': tag.start_ts,
-                'end_ts': tag.end_ts,
-                'time': currentTime,
-                'docker_image_id': tag.docker_image_id,
-                'old_docker_image_id': ''
-              };
-
-              tagData.push(create);
-              currentTags[tagName] = create;
-            }
-          });
-
-          tagData.sort(function(a, b) {
-            return b.time - a.time;
-          });
-
-          for (var i = tagData.length - 1; i >= 1; --i) {
-            var current = tagData[i];
-            var next = tagData[i - 1];
-
-            if (new Date(current.time).getDate() != new Date(next.time).getDate()) {
-              tagData.splice(i, 0, {
-                'date_break': true,
-                'date': new Date(current.time)
-              });
-              i--;
-            }
-          }
-
-          if (tagData.length > 0) {
-            tagData.splice(0, 0, {
-              'date_break': true,
-              'date': new Date(tagData[0].time)
-            });
-          }
-
-          $scope.tagHistoryData = tagData;
-        });
-      };
-
-      $scope.getEntryClasses = function(entry, historyFilter) {
-        var classes = entry.action + ' ';
-        if (!historyFilter || !entry.action) {
-          return classes;
-        }
-
-        var parts = (historyFilter || '').split(',');
-        var isMatch = parts.some(function(part) {
-          if (part && entry.tag_name) {
-            isMatch = entry.tag_name.indexOf(part) >= 0;
-            isMatch = isMatch || entry.docker_image_id.indexOf(part) >= 0;
-            isMatch = isMatch || entry.old_docker_image_id.indexOf(part) >= 0;
-            return isMatch;
-          }
-        });
-
-        classes += isMatch ? 'filtered-match' : 'filtered-mismatch';
-        return classes;
-      };
-
       $scope.showHistory = function(value, opt_tagname) {
-        if (opt_tagname) {
-          $scope.options.historyFilter = opt_tagname;
-        } else {
-          $scope.options.historyFilter = '';
-        }
-
-        if ($scope.showingHistory == value) {
-          return;
-        }
-
+        $scope.options.historyFilter = opt_tagname ? opt_tagname : '';
         $scope.showingHistory = value;
-
-        if ($scope.showingHistory) {
-          loadTimeline();
-        }
       };
 
       $scope.toggleHistory = function() {
@@ -349,14 +224,6 @@ angular.module('quay').directive('repoPanelTags', function () {
 
         return names.join(',');
       };
-
-      $scope.isChecked = function(tagName, checked) {
-        return checked.some(function(tag) {
-          if (tag.name == tagName) {
-            return true;
-          }
-        });
-      };
     }
   };
   return directiveDefinitionObject;
diff --git a/static/js/directives/ui/repo-tag-history.js b/static/js/directives/ui/repo-tag-history.js
new file mode 100644
index 000000000..840441c1c
--- /dev/null
+++ b/static/js/directives/ui/repo-tag-history.js
@@ -0,0 +1,155 @@
+/**
+ * An element which displays its contents wrapped in an <a> tag, but only if the href is not null.
+ */
+angular.module('quay').directive('repoTagHistory', function () {
+  var directiveDefinitionObject = {
+    priority: 0,
+    templateUrl: '/static/directives/repo-tag-history.html',
+    replace: false,
+    transclude: true,
+    restrict: 'C',
+    scope: {
+      'repository': '=repository',
+      'filter': '=filter',
+      'isEnabled': '=isEnabled'
+    },
+    controller: function($scope, $element, ApiService) {
+      $scope.tagHistoryData = null;
+      $scope.tagHistoryLeaves = {};
+
+      var loadTimeline = function() {
+        if (!$scope.repository || !$scope.isEnabled) { return; }
+
+        var params = {
+          'repository': $scope.repository.namespace + '/' + $scope.repository.name
+        };
+
+        ApiService.listRepoTags(null, params).then(function(resp) {
+          processTags(resp.tags);
+        });
+      };
+
+      $scope.$watch('isEnabled', loadTimeline);
+      $scope.$watch('repository', loadTimeline);
+
+      var processTags = function(tags) {
+        var entries = [];
+        var tagEntries = {};
+
+        // For each tag, turn the tag into create, move, delete, restore, etc entries.
+        tags.forEach(function(tag) {
+          var tagName = tag.name;
+          var dockerImageId = tag.docker_image_id;
+
+          if (!tagEntries[tagName]) {
+            tagEntries[tagName] = [];
+          }
+
+          var removeEntry = function(entry) {
+            entries.splice(entries.indexOf(entry), 1);
+            tagEntries[entry.tag_name].splice(tagEntries[entry.tag_name].indexOf(entry), 1);
+          };
+
+          var addEntry = function(action, time, opt_docker_id, opt_old_docker_id) {
+            var entry = {
+              'tag_name': tagName,
+              'action': action,
+              'start_ts': tag.start_ts,
+              'end_ts': tag.end_ts,
+              'time': time * 1000, // JS expects ms, not s since epoch.
+              'docker_image_id': opt_docker_id || dockerImageId,
+              'old_docker_image_id': opt_old_docker_id || ''
+            };
+
+            tagEntries[tagName].push(entry);
+            entries.push(entry);
+          };
+
+          // If the tag has an end time, it was either deleted or moved.
+          if (tag.end_ts) {
+            // If a future entry exists with a start time equal to the end time for this tag,
+            // then the action was a move, rather than a delete and a create.
+            var currentEntries = tagEntries[tagName];
+            var futureEntry = currentEntries.length > 0 ? currentEntries[currentEntries.length - 1] : {};
+            if (futureEntry.start_ts == tag.end_ts) {
+              removeEntry(futureEntry);
+              addEntry('move', tag.end_ts, futureEntry.docker_image_id, dockerImageId);
+            } else {
+              addEntry('delete', tag.end_ts)
+            }
+          }
+
+          // If the tag has a start time, it was created.
+          if (tag.start_ts) {
+            addEntry('create', tag.start_ts);
+          }
+        });
+
+        // Sort the overall entries by datetime descending.
+        entries.sort(function(a, b) {
+          return b.time - a.time;
+        });
+
+        // Sort the tag entries by datetime descending.
+        Object.keys(tagEntries).forEach(function(name) {
+          var te = tagEntries[name];
+          te.sort(function(a, b) {
+            return b.time - a.time;
+          });
+        });
+
+        // Add date dividers in.
+        for (var i = entries.length - 1; i >= 1; --i) {
+          var current = entries[i];
+          var next = entries[i - 1];
+
+          if (new Date(current.time).getDate() != new Date(next.time).getDate()) {
+            entries.splice(i, 0, {
+              'date_break': true,
+              'date': new Date(current.time)
+            });
+            i--;
+          }
+        }
+
+        // Add the top-level date divider.
+        if (entries.length > 0) {
+          entries.splice(0, 0, {
+            'date_break': true,
+            'date': new Date(entries[0].time)
+          });
+        }
+
+        $scope.historyEntries = entries;
+        $scope.historyEntryMap = tagEntries;
+      };
+
+      $scope.getEntryClasses = function(entry, historyFilter) {
+        if (!entry.action) { return ''; }
+
+        var classes = entry.action + ' ';
+        if ($scope.historyEntryMap[entry.tag_name][0] == entry) {
+          classes += ' current ';
+        }
+
+        if (!historyFilter || !entry.action) {
+          return classes;
+        }
+
+        var parts = (historyFilter || '').split(',');
+        var isMatch = parts.some(function(part) {
+          if (part && entry.tag_name) {
+            isMatch = entry.tag_name.indexOf(part) >= 0;
+            isMatch = isMatch || entry.docker_image_id.indexOf(part) >= 0;
+            isMatch = isMatch || entry.old_docker_image_id.indexOf(part) >= 0;
+            return isMatch;
+          }
+        });
+
+        classes += isMatch ? 'filtered-match' : 'filtered-mismatch';
+        return classes;
+      };
+    }
+  };
+  return directiveDefinitionObject;
+});
\ No newline at end of file

From f19d2f684ef3aa60847a5fb02f12ca685f7a3c3b Mon Sep 17 00:00:00 2001
From: Joseph Schorr <joseph.schorr@coreos.com>
Date: Thu, 16 Apr 2015 17:18:00 -0400
Subject: [PATCH 5/5] Add ability to revert tags via time machine

---
 data/database.py                              |  1 +
 ...decf6b9c4_add_revert_tag_log_entry_kind.py | 29 +++++++++
 ..._add_reversion_column_to_the_tags_table.py | 26 ++++++++
 data/model/legacy.py                          | 21 ++++++-
 endpoints/api/tag.py                          | 63 ++++++++++++++++++-
 initdb.py                                     |  1 +
 .../directives/repo-view/repo-panel-tags.css  | 17 ++++-
 static/css/directives/ui/repo-tag-history.css | 20 ++++--
 .../directives/ui/tag-operations-dialog.css   |  4 ++
 static/directives/repo-tag-history.html       |  6 ++
 .../directives/repo-view/repo-panel-tags.html | 30 +++++++--
 static/directives/tag-operations-dialog.html  | 17 +++++
 .../directives/repo-view/repo-panel-tags.js   | 22 +++++++
 static/js/directives/ui/logs-view.js          |  2 +
 static/js/directives/ui/repo-tag-history.js   |  4 +-
 .../js/directives/ui/tag-operations-dialog.js | 33 ++++++++++
 16 files changed, 277 insertions(+), 19 deletions(-)
 create mode 100644 data/migrations/versions/1c3decf6b9c4_add_revert_tag_log_entry_kind.py
 create mode 100644 data/migrations/versions/4ce2169efd3b_add_reversion_column_to_the_tags_table.py
 create mode 100644 static/css/directives/ui/tag-operations-dialog.css

diff --git a/data/database.py b/data/database.py
index 8bc0488a7..29b7e3c04 100644
--- a/data/database.py
+++ b/data/database.py
@@ -497,6 +497,7 @@ class RepositoryTag(BaseModel):
   lifetime_start_ts = IntegerField(default=get_epoch_timestamp)
   lifetime_end_ts = IntegerField(null=True, index=True)
   hidden = BooleanField(default=False)
+  reversion = BooleanField(default=False)
 
   class Meta:
     database = db
diff --git a/data/migrations/versions/1c3decf6b9c4_add_revert_tag_log_entry_kind.py b/data/migrations/versions/1c3decf6b9c4_add_revert_tag_log_entry_kind.py
new file mode 100644
index 000000000..6e2bccb68
--- /dev/null
+++ b/data/migrations/versions/1c3decf6b9c4_add_revert_tag_log_entry_kind.py
@@ -0,0 +1,29 @@
+"""Add revert_tag log entry kind
+
+Revision ID: 1c3decf6b9c4
+Revises: 4ce2169efd3b
+Create Date: 2015-04-16 17:14:11.154856
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '1c3decf6b9c4'
+down_revision = '4ce2169efd3b'
+
+from alembic import op
+import sqlalchemy as sa
+
+
+def upgrade(tables):
+    op.bulk_insert(tables.logentrykind,
+    [
+        {'id': 47, 'name':'revert_tag'},
+    ])
+
+
+def downgrade(tables):
+    op.execute(
+        (tables.logentrykind.delete()
+            .where(tables.logentrykind.c.name == op.inline_literal('revert_tag')))
+
+    )
\ No newline at end of file
diff --git a/data/migrations/versions/4ce2169efd3b_add_reversion_column_to_the_tags_table.py b/data/migrations/versions/4ce2169efd3b_add_reversion_column_to_the_tags_table.py
new file mode 100644
index 000000000..9329942b0
--- /dev/null
+++ b/data/migrations/versions/4ce2169efd3b_add_reversion_column_to_the_tags_table.py
@@ -0,0 +1,26 @@
+"""Add reversion column to the tags table
+
+Revision ID: 4ce2169efd3b
+Revises: 2b4dc0818a5e
+Create Date: 2015-04-16 17:10:16.039835
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '4ce2169efd3b'
+down_revision = '2b4dc0818a5e'
+
+from alembic import op
+import sqlalchemy as sa
+
+
+def upgrade(tables):
+    ### commands auto generated by Alembic - please adjust! ###
+    op.add_column('repositorytag', sa.Column('reversion', sa.Boolean(), nullable=False))
+    ### end Alembic commands ###
+
+
+def downgrade(tables):
+    ### commands auto generated by Alembic - please adjust! ###
+    op.drop_column('repositorytag', 'reversion')
+    ### end Alembic commands ###
diff --git a/data/model/legacy.py b/data/model/legacy.py
index 7ec27eed9..49d569bf5 100644
--- a/data/model/legacy.py
+++ b/data/model/legacy.py
@@ -1762,13 +1762,17 @@ def _tag_alive(query, now_ts=None):
                      (RepositoryTag.lifetime_end_ts > now_ts))
 
 
-def list_repository_tag_history(repository, limit=100):
+def list_repository_tag_history(repository, limit=100, specific_tag=None):
   query = (RepositoryTag
            .select(RepositoryTag, Image)
            .join(Image)
            .where(RepositoryTag.repository == repository)
            .order_by(RepositoryTag.lifetime_start_ts.desc())
            .limit(limit))
+
+  if specific_tag:
+    query = query.where(RepositoryTag.name == specific_tag)
+
   return query
 
 
@@ -1990,7 +1994,7 @@ def get_parent_images(namespace_name, repository_name, image_obj):
 
 
 def create_or_update_tag(namespace_name, repository_name, tag_name,
-                         tag_docker_image_id):
+                         tag_docker_image_id, reversion=False):
   try:
     repo = _get_repository(namespace_name, repository_name)
   except Repository.DoesNotExist:
@@ -2015,7 +2019,7 @@ def create_or_update_tag(namespace_name, repository_name, tag_name,
       raise DataModelException('Invalid image with id: %s' % tag_docker_image_id)
 
     return RepositoryTag.create(repository=repo, image=image, name=tag_name,
-                                lifetime_start_ts=now_ts)
+                                lifetime_start_ts=now_ts, reversion=reversion)
 
 def delete_tag(namespace_name, repository_name, tag_name):
   now_ts = get_epoch_timestamp()
@@ -2823,3 +2827,14 @@ def repository_is_starred(user, repository):
     return True
   except Star.DoesNotExist:
     return False
+
+
+def revert_tag(namespace_name, repository_name, tag_name, docker_image_id):
+  """ Reverts a tag to a specific image ID. """
+  image = get_image_by_id(namespace_name, repository_name, docker_image_id)
+  if image is None:
+    raise DataModelException('Cannot revert to unknown image')
+
+  return create_or_update_tag(namespace_name, repository_name, tag_name, docker_image_id,
+                              reversion=True)
+
diff --git a/endpoints/api/tag.py b/endpoints/api/tag.py
index f698be851..c5a6b2288 100644
--- a/endpoints/api/tag.py
+++ b/endpoints/api/tag.py
@@ -2,7 +2,7 @@ from flask import request, abort
 
 from endpoints.api import (resource, nickname, require_repo_read, require_repo_write,
                            RepositoryParamResource, log_action, NotFound, validate_json_request,
-                           path_param, format_date)
+                           path_param, format_date, parse_args, query_param)
 from endpoints.api.image import image_view
 from data import model
 from auth.auth_context import get_authenticated_user
@@ -17,8 +17,11 @@ class ListRepositoryTags(RepositoryParamResource):
   """ Resource for listing repository tags. """
 
   @require_repo_write
+  @parse_args
+  @query_param('specificTag', 'Filters the tags to the specific tag.', type=str, default='')
+  @query_param('limit', 'Limit to the number of results to return. Max 100.', type=int, default=50)
   @nickname('listRepoTags')
-  def get(self, namespace, repository):
+  def get(self, args, namespace, repository):
     repo = model.get_repository(namespace, repository)
     if not repo:
       abort(404)
@@ -27,6 +30,7 @@ class ListRepositoryTags(RepositoryParamResource):
       tag_info = {
         'name': tag.name,
         'docker_image_id': tag.image.docker_image_id,
+        'reversion': tag.reversion,
       }
 
       if tag.lifetime_start_ts > 0:
@@ -37,7 +41,9 @@ class ListRepositoryTags(RepositoryParamResource):
 
       return tag_info
 
-    tags = model.list_repository_tag_history(repo, limit=100)
+    specific_tag = args.get('specificTag') or None
+    limit = min(100, max(1, args.get('limit', 50)))
+    tags = model.list_repository_tag_history(repo, limit=limit, specific_tag=specific_tag)
     return {'tags': [tag_view(tag) for tag in tags]}
 
 
@@ -134,3 +140,54 @@ class RepositoryTagImages(RepositoryParamResource):
     return {
       'images': [image_view(image, image_map) for image in all_images]
     }
+
+
+
+@resource('/v1/repository/<repopath:repository>/tag/<tag>/revert')
+@path_param('repository', 'The full path of the repository. e.g. namespace/name')
+@path_param('tag', 'The name of the tag')
+class RevertTag(RepositoryParamResource):
+  """ Resource for reverting a repository tag back to a previous image. """
+  schemas = {
+    'RevertTag': {
+      'id': 'RevertTag',
+      'type': 'object',
+      'description': 'Reverts a tag to a specific image',
+      'required': [
+        'image',
+      ],
+      'properties': {
+        'image': {
+          'type': 'string',
+          'description': 'Image identifier to which the tag should point',
+        },
+      },
+    },
+  }
+
+  @require_repo_write
+  @nickname('revertTag')
+  @validate_json_request('RevertTag')
+  def post(self, namespace, repository, tag):
+    """ Reverts a repository tag back to a previous image in the repository. """
+    try:
+      tag_image = model.get_tag_image(namespace, repository, tag)
+    except model.DataModelException:
+      raise NotFound()
+
+    # Revert the tag back to the previous image.
+    image_id = request.get_json()['image']
+    model.revert_tag(namespace, repository, tag, image_id)
+    model.garbage_collect_repository(namespace, repository)
+
+    # Log the reversion.
+    username = get_authenticated_user().username
+    log_action('revert_tag', namespace,
+               {'username': username, 'repo': repository, 'tag': tag,
+                'image': image_id, 'original_image': tag_image.docker_image_id},
+                repo=model.get_repository(namespace, repository))
+
+    return {
+      'image_id': image_id,
+      'original_image_id': tag_image.docker_image_id
+    }
diff --git a/initdb.py b/initdb.py
index 0788884cb..4d40da2ed 100644
--- a/initdb.py
+++ b/initdb.py
@@ -220,6 +220,7 @@ def initialize_database():
   LogEntryKind.create(name='create_tag')
   LogEntryKind.create(name='move_tag')
   LogEntryKind.create(name='delete_tag')
+  LogEntryKind.create(name='revert_tag')
   LogEntryKind.create(name='add_repo_permission')
   LogEntryKind.create(name='change_repo_permission')
   LogEntryKind.create(name='delete_repo_permission')
diff --git a/static/css/directives/repo-view/repo-panel-tags.css b/static/css/directives/repo-view/repo-panel-tags.css
index 9df9c2679..c515b9190 100644
--- a/static/css/directives/repo-view/repo-panel-tags.css
+++ b/static/css/directives/repo-view/repo-panel-tags.css
@@ -65,7 +65,22 @@
   padding-left: 20px;
 }
 
-.repo-panel-tags-element .options-col .fa-download {
+.repo-panel-tags-element .options-col .fa-download, .repo-panel-tags-element .options-col .fa-history {
   color: #999;
   cursor: pointer;
+}
+
+.repo-panel-tags-element .tag-image-history-item .image-id {
+  font-family: Consolas, "Lucida Console", Monaco, monospace;
+  font-size: 12px;
+}
+
+.repo-panel-tags-element .tag-image-history-item .image-apply-time {
+  color: #ccc;
+  font-size: 11px;
+  padding-left: 20px;
+}
+
+.repo-panel-tags-element .tag-image-history-item .fa-circle-o {
+  margin-right: 2px;
 }
\ No newline at end of file
diff --git a/static/css/directives/ui/repo-tag-history.css b/static/css/directives/ui/repo-tag-history.css
index 7ee39b7bc..a0a2c2df7 100644
--- a/static/css/directives/ui/repo-tag-history.css
+++ b/static/css/directives/ui/repo-tag-history.css
@@ -41,14 +41,15 @@
 }
 
 .repo-tag-history-element .history-entry .history-date-break:before {
-  content: "";
+  content: "\f073";
+  font-family: FontAwesome;
+
   position: absolute;
-  border-radius: 50%;
   width: 12px;
   height: 12px;
-  background: #ccc;
-  top: 4px;
-  left: -7px;
+  top: 1px;
+  left: -9px;
+  background: white;
 }
 
 .repo-tag-history-element .history-entry .history-icon {
@@ -79,11 +80,20 @@
   font-family: FontAwesome;
 }
 
+.repo-tag-history-element .history-entry.revert .history-icon:before {
+  content: "\f0e2";
+  font-family: FontAwesome;
+}
+
 .repo-tag-history-element .history-entry.delete .history-icon:before {
   content: "\f014";
   font-family: FontAwesome;
 }
 
+.repo-tag-history-element .history-entry.current.revert .history-icon {
+  background-color: #F0C577;
+}
+
 .repo-tag-history-element .history-entry.current.move .history-icon {
   background-color: #77BFF0;
 }
diff --git a/static/css/directives/ui/tag-operations-dialog.css b/static/css/directives/ui/tag-operations-dialog.css
new file mode 100644
index 000000000..1bbccaaff
--- /dev/null
+++ b/static/css/directives/ui/tag-operations-dialog.css
@@ -0,0 +1,4 @@
+.tag-operations-dialog .image-id {
+  font-family: Consolas, "Lucida Console", Monaco, monospace;
+  font-size: 12px;
+}
\ No newline at end of file
diff --git a/static/directives/repo-tag-history.html b/static/directives/repo-tag-history.html
index 73bd1c6b2..f6e4c30c1 100644
--- a/static/directives/repo-tag-history.html
+++ b/static/directives/repo-tag-history.html
@@ -35,6 +35,12 @@
                   from image
                   <span class="image-link" repository="repository" image-id="entry.old_docker_image_id"></span>
                 </span>
+                <span ng-switch-when="revert">
+                  was reverted to image
+                  <span class="image-link" repository="repository" image-id="entry.docker_image_id"></span>
+                  from image
+                  <span class="image-link" repository="repository" image-id="entry.old_docker_image_id"></span>
+                </span>
               </span>
             </div>
             <div class="history-datetime">{{ entry.time | amDateFormat:'dddd, MMMM Do YYYY, h:mm:ss a' }}</div>
diff --git a/static/directives/repo-view/repo-panel-tags.html b/static/directives/repo-view/repo-panel-tags.html
index 9454d8f4e..ee54bf013 100644
--- a/static/directives/repo-view/repo-panel-tags.html
+++ b/static/directives/repo-view/repo-panel-tags.html
@@ -77,6 +77,7 @@
           style="min-width: 120px;">
         <a href="javascript:void(0)" ng-click="orderBy('image_id')">Image</a>
       </td>
+      <td class="options-col" ng-if="repository.can_write"></td>
       <td class="options-col"></td>
       <td class="options-col"></td>
      </thead>
@@ -105,12 +106,30 @@
            ng-click="fetchTagActionHandler.askFetchTag(tag)">
         </i>
       </td>
+      <td class="options-col" ng-if="repository.can_write">
+        <div class="dropdown" style="text-align: left;">
+          <i class="fa fa-history dropdown-toggle" data-toggle="dropdown" data-title="Tag History"
+             ng-click="loadTagHistory(tag)"
+             bs-tooltip></i>
+          <ul class="dropdown-menu pull-right">
+            <li ng-if="!tagHistory[tag.name]"><div class="cor-loader"></div></li>
+            <li class="tag-image-history-item" ng-repeat="entry in tagHistory[tag.name]">
+              <a href="javascript:void(0)" ng-click="askRevertTag(tag, entry.docker_image_id)">
+                <div class="image-id">
+                  <i class="fa fa-circle-o"
+                     ng-style="{'color': imageMap[entry.docker_image_id].color || '#eee'}"></i>
+                  {{ entry.docker_image_id.substr(0, 12) }}
+                </div>
+                <div class="image-apply-time">
+                  {{ entry.start_ts * 1000 | amDateFormat:'dddd, MMMM Do YYYY, h:mm:ss a' }}
+                </div>
+              </a>
+            </li>
+          </ul>
+        </div>
+      </td>
       <td class="options-col">
         <span class="cor-options-menu" ng-if="repository.can_write">
-          <span class="cor-option" option-click="showHistory(true, tag.name)"
-                ng-if="tag.last_modified">
-            <i class="fa fa-history"></i> View Tag History
-          </span>
           <span class="cor-option" option-click="askDeleteTag(tag.name)">
             <i class="fa fa-times"></i> Delete Tag
           </span>
@@ -137,5 +156,4 @@
 <div class="tag-operations-dialog" repository="repository" images="images"
      action-handler="tagActionHandler"></div>
 
-<div class="fetch-tag-dialog" repository="repository" action-handler="fetchTagActionHandler">
-</div>
\ No newline at end of file
+<div class="fetch-tag-dialog" repository="repository" action-handler="fetchTagActionHandler"></div>
\ No newline at end of file
diff --git a/static/directives/tag-operations-dialog.html b/static/directives/tag-operations-dialog.html
index 2c5ebd616..92a8a7fd0 100644
--- a/static/directives/tag-operations-dialog.html
+++ b/static/directives/tag-operations-dialog.html
@@ -85,3 +85,20 @@
     </div>
   </div>
 </div>
+
+  <!-- Recert Tag Confirm -->
+  <div class="cor-confirm-dialog"
+       dialog-context="revertTagInfo"
+       dialog-action="revertTag(info.tag, info.image_id, callback)"
+       dialog-title="Revert Tag"
+       dialog-action-title="Revert Tag">
+
+    <div class="co-alert co-alert-warning">
+      This will change the image to which the tag points.
+    </div>
+
+    Are you sure you want to revert tag
+    <span class="label label-default tag">{{ revertTagInfo.tag.name }}</span> to image
+    <span class="image-id">{{ revertTagInfo.image_id.substr(0, 12) }}?</span>
+  </div>
+</div>
\ No newline at end of file
diff --git a/static/js/directives/repo-view/repo-panel-tags.js b/static/js/directives/repo-view/repo-panel-tags.js
index 3d0604503..97b63250b 100644
--- a/static/js/directives/repo-view/repo-panel-tags.js
+++ b/static/js/directives/repo-view/repo-panel-tags.js
@@ -24,6 +24,7 @@ angular.module('quay').directive('repoPanelTags', function () {
       };
 
       $scope.iterationState = {};
+      $scope.tagHistory = {};
       $scope.tagActionHandler = null;
       $scope.showingHistory = false;
 
@@ -84,6 +85,9 @@ angular.module('quay').directive('repoPanelTags', function () {
               'count': imageMap[image_id].length,
               'tags': imageMap[image_id]
             });
+
+            imageMap[image_id]['color'] = colors(index);
+
             ++index;
           }
         });
@@ -224,6 +228,24 @@ angular.module('quay').directive('repoPanelTags', function () {
 
         return names.join(',');
       };
+
+      $scope.loadTagHistory = function(tag) {
+        delete $scope.tagHistory[tag.name];
+
+        var params = {
+          'repository': $scope.repository.namespace + '/' + $scope.repository.name,
+          'specificTag': tag.name,
+          'limit': 5
+        };
+
+        ApiService.listRepoTags(null, params).then(function(resp) {
+          $scope.tagHistory[tag.name] = resp.tags;
+        }, ApiService.errorDisplay('Could not load tag history'));
+      };
+
+      $scope.askRevertTag = function(tag, image_id) {
+        $scope.tagActionHandler.askRevertTag(tag, image_id);
+      };
     }
   };
   return directiveDefinitionObject;
diff --git a/static/js/directives/ui/logs-view.js b/static/js/directives/ui/logs-view.js
index 8f85c3261..9a353b2c8 100644
--- a/static/js/directives/ui/logs-view.js
+++ b/static/js/directives/ui/logs-view.js
@@ -98,6 +98,7 @@ angular.module('quay').directive('logsView', function () {
               return 'Remove permission for token {token} from repository {repo}';
             }
           },
+          'revert_tag': 'Tag {tag} reverted to image {image} from image {original_image}',
           'delete_tag': 'Tag {tag} deleted in repository {repo} by user {username}',
           'create_tag': 'Tag {tag} created in repository {repo} on image {image} by user {username}',
           'move_tag': 'Tag {tag} moved from image {original_image} to image {image} in repository {repo} by user {username}',
@@ -213,6 +214,7 @@ angular.module('quay').directive('logsView', function () {
         'delete_tag': 'Delete Tag',
         'create_tag': 'Create Tag',
         'move_tag': 'Move Tag',
+        'revert_tag':' Revert Tag',
         'org_create_team': 'Create team',
         'org_delete_team': 'Delete team',
         'org_add_team_member': 'Add team member',
diff --git a/static/js/directives/ui/repo-tag-history.js b/static/js/directives/ui/repo-tag-history.js
index 840441c1c..c6ba6120d 100644
--- a/static/js/directives/ui/repo-tag-history.js
+++ b/static/js/directives/ui/repo-tag-history.js
@@ -56,6 +56,7 @@ angular.module('quay').directive('repoTagHistory', function () {
               'action': action,
               'start_ts': tag.start_ts,
               'end_ts': tag.end_ts,
+              'reversion': tag.reversion,
               'time': time * 1000, // JS expects ms, not s since epoch.
               'docker_image_id': opt_docker_id || dockerImageId,
               'old_docker_image_id': opt_old_docker_id || ''
@@ -73,7 +74,8 @@ angular.module('quay').directive('repoTagHistory', function () {
             var futureEntry = currentEntries.length > 0 ? currentEntries[currentEntries.length - 1] : {};
             if (futureEntry.start_ts == tag.end_ts) {
               removeEntry(futureEntry);
-              addEntry('move', tag.end_ts, futureEntry.docker_image_id, dockerImageId);
+              addEntry(futureEntry.reversion ? 'revert': 'move', tag.end_ts,
+                       futureEntry.docker_image_id, dockerImageId);
             } else {
               addEntry('delete', tag.end_ts)
             }
diff --git a/static/js/directives/ui/tag-operations-dialog.js b/static/js/directives/ui/tag-operations-dialog.js
index 4a5aa1877..3fc3ea080 100644
--- a/static/js/directives/ui/tag-operations-dialog.js
+++ b/static/js/directives/ui/tag-operations-dialog.js
@@ -121,6 +121,25 @@ angular.module('quay').directive('tagOperationsDialog', function () {
         }, errorHandler);
       };
 
+      $scope.revertTag = function(tag, image_id, callback) {
+        if (!$scope.repository.can_write) { return; }
+
+        var params = {
+          'repository': $scope.repository.namespace + '/' + $scope.repository.name,
+          'tag': tag.name
+        };
+
+        var data = {
+          'image': image_id
+        };
+
+        var errorHandler = ApiService.errorDisplay('Cannot revert tag', callback);
+        ApiService.revertTag(data, params).then(function() {
+          callback(true);
+          markChanged([], [tag]);
+        }, errorHandler);
+      };
+
       $scope.actionHandler = {
         'askDeleteTag': function(tag) {
           $scope.deleteTagInfo = {
@@ -140,6 +159,20 @@ angular.module('quay').directive('tagOperationsDialog', function () {
           $scope.addingTag = false;
           $scope.addTagForm.$setPristine();
           $element.find('#createOrMoveTagModal').modal('show');
+        },
+
+        'askRevertTag': function(tag, image_id) {
+          if (tag.image_id == image_id) {
+            bootbox.alert('This is the current image for the tag');
+            return;
+          }
+
+          $scope.revertTagInfo = {
+            'tag': tag,
+            'image_id': image_id
+          };
+
+          $element.find('#revertTagModal').modal('show');
         }
       };
     }