1 files changed, 53 insertions, 0 deletions
diff --git a/comm/mailnews/base/src/MsgProtocolInfo.sys.mjs b/comm/mailnews/base/src/MsgProtocolInfo.sys.mjs
new file mode 100644
index 0000000000..7c9088e12e
--- /dev/null
+++ b/comm/mailnews/base/src/MsgProtocolInfo.sys.mjs
@@ -0,0 +1,53 @@
+/* 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/. */
+
+/**
+ * @see {nsIMsgProtocolInfo}
+ */
+export class MsgProtocolInfo {
+  get defaultLocalPath() {
+    let file = this._getFileValue(this.RELATIVE_PREF, this.ABSOLUTE_PREF);
+    if (!file) {
+      file = Services.dirsvc.get(this.DIR_SERVICE_PROP, Ci.nsIFile);
+      this._setFileValue(this.RELATIVE_PREF, this.ABSOLUTE_PREF, file);
+    }
+    if (!file.exists()) {
+      file.createUnique(Ci.nsIFile.DIRECTORY_TYPE, 0o775);
+    }
+    file.normalize();
+    return file;
+  }
+
+  set defaultLocalPath(value) {
+    this._setFileValue(this.RELATIVE_PREF, this.ABSOLUTE_PREF, value);
+  }
+
+  _getFileValue(relPrefName, absPrefName) {
+    try {
+      return Services.prefs.getComplexValue(relPrefName, Ci.nsIRelativeFilePref)
+        .file;
+    } catch (e) {
+      try {
+        let file = Services.prefs.getComplexValue(absPrefName, Ci.nsIFile);
+        Services.prefs.setComplexValue(relPrefName, Ci.nsIRelativeFilePref, {
+          QueryInterface: ChromeUtils.generateQI(["nsIRelativeFilePref"]),
+          file,
+          relativeToKey: "ProfD",
+        });
+        return file;
+      } catch (e) {
+        return null;
+      }
+    }
+  }
+
+  _setFileValue(relPrefName, absPrefName, file) {
+    Services.prefs.setComplexValue(relPrefName, Ci.nsIRelativeFilePref, {
+      QueryInterface: ChromeUtils.generateQI(["nsIRelativeFilePref"]),
+      file,
+      relativeToKey: "ProfD",
+    });
+    Services.prefs.setComplexValue(absPrefName, Ci.nsIFile, file);
+  }
+}