Stop using global shared state for ExtensionDiscovery and it's relatives

Co-authored-by: Mikko Aspiala <mikko.aspiala@gmail.com>
Signed-off-by: Janne Savolainen <janne.savolainen@live.fi>

src/extensions/extensions-store/extensions-store.injectable.ts

@@ -0,0 +1,29 @@
+/**
+ * Copyright (c) 2021 OpenLens Authors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+import { getInjectable, lifecycleEnum } from "@ogre-tools/injectable";
+import { ExtensionsStore } from "./extensions-store";
+
+const extensionsStoreInjectable = getInjectable({
+  instantiate: () => ExtensionsStore.createInstance(),
+  lifecycle: lifecycleEnum.singleton,
+});
+
+export default extensionsStoreInjectable;

src/extensions/extensions-store/extensions-store.ts

@@ -0,0 +1,76 @@
+/**
+ * Copyright (c) 2021 OpenLens Authors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+import type { LensExtensionId } from "../lens-extension";
+import { action, computed, makeObservable, observable } from "mobx";
+import { toJS } from "../../common/utils";
+import { BaseStore } from "../../common/base-store";
+
+export interface LensExtensionsStoreModel {
+  extensions: Record<LensExtensionId, LensExtensionState>;
+}
+
+export interface LensExtensionState {
+  enabled?: boolean;
+  name: string;
+}
+
+export class ExtensionsStore extends BaseStore<LensExtensionsStoreModel> {
+  readonly displayName = "ExtensionsStore";
+  constructor() {
+    super({
+      configName: "lens-extensions",
+    });
+    makeObservable(this);
+    this.load();
+  }
+
+  @computed
+  get enabledExtensions() {
+    return Array.from(this.state.values())
+      .filter(({ enabled }) => enabled)
+      .map(({ name }) => name);
+  }
+
+  protected state = observable.map<LensExtensionId, LensExtensionState>();
+
+  isEnabled({ id, isBundled }: { id: string, isBundled: boolean }): boolean {
+    // By default false, so that copied extensions are disabled by default.
+    // If user installs the extension from the UI, the Extensions component will specifically enable it.
+    return isBundled || Boolean(this.state.get(id)?.enabled);
+  }
+
+  @action
+  mergeState(extensionsState: Record<LensExtensionId, LensExtensionState>) {
+    this.state.merge(extensionsState);
+  }
+
+  @action
+  protected fromStore({ extensions }: LensExtensionsStoreModel) {
+    this.state.merge(extensions);
+  }
+
+  toJSON(): LensExtensionsStoreModel {
+    return toJS({
+      extensions: Object.fromEntries(this.state),
+    });
+  }
+}