Remember all capabilities given to a widget

Fixes element-hq/element-web#18786

Instead of replacing the remembered set, we now add to it. This should be safe as the user expectation was previously to remember the capabilities, so we can keep appending to that list.

This commit also moves the utility functions closer to the widget driver as they aren't needed in the dialog anymore.

src/components/views/dialogs/WidgetCapabilitiesPromptDialog.tsx

@@ -31,14 +31,6 @@ import LabelledToggleSwitch from "../elements/LabelledToggleSwitch";
 import { CapabilityText } from "../../../widgets/CapabilityText";
 import { replaceableComponent } from "../../../utils/replaceableComponent";
 
-export function getRememberedCapabilitiesForWidget(widget: Widget): Capability[] {
-    return JSON.parse(localStorage.getItem(`widget_${widget.id}_approved_caps`) || "[]");
-}
-
-function setRememberedCapabilitiesForWidget(widget: Widget, caps: Capability[]) {
-    localStorage.setItem(`widget_${widget.id}_approved_caps`, JSON.stringify(caps));
-}
-
 interface IProps extends IDialogProps {
     requestedCapabilities: Set<Capability>;
     widget: Widget;
@@ -95,10 +87,7 @@ export default class WidgetCapabilitiesPromptDialog extends React.PureComponent<
     };
 
     private closeAndTryRemember(approved: Capability[]) {
-        if (this.state.rememberSelection) {
-            setRememberedCapabilitiesForWidget(this.props.widget, approved);
-        }
-        this.props.onFinished({ approved });
+        this.props.onFinished({ approved, remember: this.state.rememberSelection });
     }
 
     public render() {

src/stores/widgets/StopGapWidgetDriver.ts

@@ -33,9 +33,7 @@ import { MatrixClientPeg } from "../../MatrixClientPeg";
 import ActiveRoomObserver from "../../ActiveRoomObserver";
 import Modal from "../../Modal";
 import WidgetOpenIDPermissionsDialog from "../../components/views/dialogs/WidgetOpenIDPermissionsDialog";
-import WidgetCapabilitiesPromptDialog, {
-    getRememberedCapabilitiesForWidget,
-} from "../../components/views/dialogs/WidgetCapabilitiesPromptDialog";
+import WidgetCapabilitiesPromptDialog from "../../components/views/dialogs/WidgetCapabilitiesPromptDialog";
 import { WidgetPermissionCustomisations } from "../../customisations/WidgetPermissions";
 import { OIDCState, WidgetPermissionStore } from "./WidgetPermissionStore";
 import { WidgetType } from "../../widgets/WidgetType";
@@ -48,6 +46,14 @@ import { MatrixEvent } from "matrix-js-sdk/src/models/event";
 
 // TODO: Purge this from the universe
 
+function getRememberedCapabilitiesForWidget(widget: Widget): Capability[] {
+    return JSON.parse(localStorage.getItem(`widget_${widget.id}_approved_caps`) || "[]");
+}
+
+function setRememberedCapabilitiesForWidget(widget: Widget, caps: Capability[]) {
+    localStorage.setItem(`widget_${widget.id}_approved_caps`, JSON.stringify(caps));
+}
+
 export class StopGapWidgetDriver extends WidgetDriver {
     private allowedCapabilities: Set<Capability>;
 
@@ -100,6 +106,7 @@ export class StopGapWidgetDriver extends WidgetDriver {
             }
         }
         // TODO: Do something when the widget requests new capabilities not yet asked for
+        let rememberApproved = false;
         if (missing.size > 0) {
             try {
                 const [result] = await Modal.createTrackedDialog(
@@ -111,12 +118,19 @@ export class StopGapWidgetDriver extends WidgetDriver {
                         widgetKind: this.forWidgetKind,
                     }).finished;
                 (result.approved || []).forEach(cap => allowedSoFar.add(cap));
+                rememberApproved = result.remember;
             } catch (e) {
                 console.error("Non-fatal error getting capabilities: ", e);
             }
         }
 
-        return new Set(iterableUnion(allowedSoFar, requested));
+        const allAllowed = new Set(iterableUnion(allowedSoFar, requested));
+
+        if (rememberApproved) {
+            setRememberedCapabilitiesForWidget(this.forWidget, Array.from(allAllowed));
+        }
+
+        return allAllowed;
     }
 
     public async sendEvent(eventType: string, content: any, stateKey: string = null): Promise<ISendEventDetails> {