1 files changed, 95 insertions, 0 deletions
diff --git a/mailnews/db/gloda/modules/noun_tag.js b/mailnews/db/gloda/modules/noun_tag.js
new file mode 100644
index 000000000..292bdad9b
--- /dev/null
+++ b/mailnews/db/gloda/modules/noun_tag.js
@@ -0,0 +1,95 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+this.EXPORTED_SYMBOLS = ['TagNoun'];
+
+Components.utils.import("resource:///modules/mailServices.js");
+
+var Cc = Components.classes;
+var Ci = Components.interfaces;
+var Cr = Components.results;
+var Cu = Components.utils;
+
+Cu.import("resource:///modules/gloda/gloda.js");
+
+/**
+ * @namespace Tag noun provider.
+ */
+var TagNoun = {
+  name: "tag",
+  clazz: Ci.nsIMsgTag,
+  usesParameter: true,
+  allowsArbitraryAttrs: false,
+  idAttr: "key",
+  _msgTagService: null,
+  _tagMap: null,
+  _tagList: null,
+
+  _init: function () {
+    this._msgTagService = MailServices.tags;
+    this._updateTagMap();
+  },
+
+  getAllTags: function gloda_noun_tag_getAllTags() {
+    if (this._tagList == null)
+      this._updateTagMap();
+    return this._tagList;
+  },
+
+  _updateTagMap: function gloda_noun_tag_updateTagMap() {
+    this._tagMap = {};
+    let tagArray = this._tagList = this._msgTagService.getAllTags({});
+    for (let iTag = 0; iTag < tagArray.length; iTag++) {
+      let tag = tagArray[iTag];
+      this._tagMap[tag.key] = tag;
+    }
+  },
+
+  comparator: function gloda_noun_tag_comparator(a, b) {
+    if (a == null) {
+      if (b == null)
+        return 0;
+      else
+        return 1;
+    }
+    else if (b == null) {
+      return -1;
+    }
+    return a.tag.localeCompare(b.tag);
+  },
+  userVisibleString: function gloda_noun_tag_userVisibleString(aTag) {
+    return aTag.tag;
+  },
+
+  // we cannot be an attribute value
+
+  toParamAndValue: function gloda_noun_tag_toParamAndValue(aTag) {
+    return [aTag.key, null];
+  },
+  toJSON: function gloda_noun_tag_toJSON(aTag) {
+    return aTag.key;
+  },
+  fromJSON: function gloda_noun_tag_fromJSON(aTagKey, aIgnored) {
+    let tag = this._tagMap.hasOwnProperty(aTagKey) ? this._tagMap[aTagKey]
+                : undefined;
+    // you will note that if a tag is removed, we are unable to aggressively
+    //  deal with this.  we are okay with this, but it would be nice to be able
+    //  to listen to the message tag service to know when we should rebuild.
+    if ((tag === undefined) && this._msgTagService.isValidKey(aTagKey)) {
+      this._updateTagMap();
+      tag = this._tagMap[aTagKey];
+    }
+    // we intentionally are returning undefined if the tag doesn't exist
+    return tag;
+  },
+  /**
+   * Convenience helper to turn a tag key into a tag name.
+   */
+  getTag: function gloda_noun_tag_getTag(aTagKey) {
+    return this.fromJSON(aTagKey);
+  }
+};
+
+TagNoun._init();
+Gloda.defineNoun(TagNoun, Gloda.NOUN_TAG);