config_service: Added revision and timestamp to config-set-cards and config-set pages

appengine/config_service/ui/common/common-behaviors.html

+<!--
+  Copyright 2017 The LUCI Authors. All rights reserved.
+  Use of this source code is governed under the Apache License, Version 2.0
+  that can be found in the LICENSE file.
+
+  It contains the definition of the following Behaviors:
+
+    ConfigUIBehaviors.CommonBehavior
+
+  To use it, include
+      behaviors: [ConfigUIBehaviors.CommonBehavior]
+  in the creation of any Polymer element.
+
+  ConfigUIBehaviors.CommonBehavior contains shared methods to ease
+  templating, such _isEmpty() and _not(), as well as general utility methods
+  such as _formatDate and _getTimestamp.
+ -->
+
+ <script>
+  window.ConfigUIBehaviors = window.ConfigUIBehaviors || {};
+  (function(){
+    // This behavior wraps up all the shared config UI functionality.
+    ConfigUIBehaviors.CommonBehavior = {
+
+      _formatDate: function(timestamp) {
+        if (timestamp === null) return "Not Found";
+
+        var date = new Date(timestamp / 1000);
+        var seconds = Math.floor((new Date() - date) / 1000);
+
+        var interval = Math.floor(seconds / 31536000);
+        if (interval > 1) {
+          return interval + " years ago";
+        }
+        interval = Math.floor(seconds / 2592000);
+        if (interval > 1) {
+          return interval + " months ago";
+        }
+        interval = Math.floor(seconds / 86400);
+        if (interval > 1) {
+          return interval + " days ago";
+        }
+        interval = Math.floor(seconds / 3600);
+        if (interval > 1) {
+          return interval + " hours ago";
+        }
+        interval = Math.floor(seconds / 60);
+        if (interval > 1) {
+          return interval + " minutes ago";
+        }
+        return Math.floor(seconds) + " seconds ago";
+      },
+
+      _formatRevision: function(revision) {
+        if (revision === "Not Found") return revision;
+        return revision.substring(0, 7);
+      },
+
+      _frontPageIsActive: function() {
+        if (this.frontPageIsActive === false) {
+          this.isLoading = true;
+          if (!this.initialized) {
+            document.addEventListener('fetch-configs', function() {
+              this.$.requestConfigs.generateRequest();
+            }.bind(this));
+          } else {
+            this.$.requestConfigs.generateRequest();
+          }
+        }
+      },
+
+      _getExactTime: function(timestamp) {
+        if (timestamp === null) return "Not Found"; 
+        var date = new Date(timestamp / 1000);
+        return date.toString();
+      },
+
+      _getTimestamp: function(lastImportAttempt, revision) {
+        if (lastImportAttempt && lastImportAttempt.success) {
+          return lastImportAttempt.revision.timestamp;
+        } else if (revision && revision.timestamp) {
+          return revision.timestamp;
+        } else {
+          return null;
+        }
+      },
+
+      _getRevision: function(revision) {
+        if (revision) {
+          return revision.id;
+        } else {
+          return "Not Found"
+        }
+      },
+
+      _isEmpty: function(list) {
+        return list.length === 0;
+      },
+
+      _not: function(a) {
+        return !a;
+      },
+    };
+  })();
+</script>