Migrate blacklistUnverifiedDevicesPerRoom

This currently causes a split-brain scenario for the application due to the priority of each level. Granular settings assumes a simple override, however the crypto setting wants per room to be overriden with the global setting, regardless of the room setting. Some additional comments are needed on the intended behaviour.

Signed-off-by: Travis Ralston <travpc@gmail.com>

src/settings/DefaultSettingsHandler.js

@@ -14,7 +14,6 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-import Promise from 'bluebird';
 import SettingsHandler from "./SettingsHandler";
 
 /**

src/settings/RoomDeviceSettingsHandler.js

@@ -23,12 +23,30 @@ import SettingsHandler from "./SettingsHandler";
  */
 export default class RoomDeviceSettingsHandler extends SettingsHandler {
     getValue(settingName, roomId) {
-        const value = localStorage.getItem(this._getKey(settingName, roomId));
-        if (!value) return null;
-        return JSON.parse(value).value;
+        // Special case blacklist setting to use legacy values
+        if (settingName === "blacklistUnverifiedDevices") {
+            const value = this._read("mx_local_settings");
+            if (value && value['blacklistUnverifiedDevicesPerRoom']) {
+                return value['blacklistUnverifiedDevicesPerRoom'][roomId];
+            }
+        }
+
+        const value = this._read(this._getKey(settingName, roomId));
+        if (value) return value.value;
+        return null;
     }
 
     setValue(settingName, roomId, newValue) {
+        // Special case blacklist setting for legacy structure
+        if (settingName === "blacklistUnverifiedDevices") {
+            let value = this._read("mx_local_settings");
+            if (!value) value = {};
+            if (!value["blacklistUnverifiedDevicesPerRoom"]) value["blacklistUnverifiedDevicesPerRoom"] = {};
+            value["blacklistUnverifiedDevicesPerRoom"][roomId] = newValue;
+            localStorage.setItem("mx_local_settings", JSON.stringify(value));
+            return Promise.resolve();
+        }
+
         if (newValue === null) {
             localStorage.removeItem(this._getKey(settingName, roomId));
         } else {
@@ -47,6 +65,12 @@ export default class RoomDeviceSettingsHandler extends SettingsHandler {
         return localStorage !== undefined && localStorage !== null;
     }
 
+    _read(key) {
+        const rawValue = localStorage.getItem(key);
+        if (!rawValue) return null;
+        return JSON.parse(rawValue);
+    }
+
     _getKey(settingName, roomId) {
         return "mx_setting_" + settingName + "_" + roomId;
     }

src/settings/Settings.js

@@ -188,16 +188,12 @@ export const SETTINGS = {
         supportedLevels: LEVELS_DEVICE_ONLY_SETTINGS_WITH_CONFIG,
         default: 200,
     },
-    "blacklistUnverifiedDevicesPerRoom": {
-        // TODO: {Travis} Write a migration path to support blacklistUnverifiedDevices
-        supportedLevels: LEVELS_DEVICE_ONLY_SETTINGS,
-        displayName: _td('Never send encrypted messages to unverified devices from this device'),
-        default: {},
-    },
     "blacklistUnverifiedDevices": {
-        // TODO: {Travis} Write a migration path to support blacklistUnverifiedDevices
         supportedLevels: LEVELS_DEVICE_ONLY_SETTINGS,
-        displayName: _td('Never send encrypted messages to unverified devices from this device'),
+        displayName: {
+            "default": _td('Never send encrypted messages to unverified devices from this device'),
+            "room-device": _td('Never send encrypted messages to unverified devices in this room from this device'),
+        },
         default: false,
     },
     "urlPreviewsEnabled": {