Extensions-api: initial hello-world example (#817)

Signed-off-by: Roman <ixrock@gmail.com>
Co-authored-by: Alex Andreev <alex.andreev.email@gmail.com>

src/extensions/example-extension/example-extension.ts

@@ -1,17 +0,0 @@
-import { LensExtension, Icon, LensRuntimeRendererEnv } from "@lens/extensions"; // fixme: map to generated types from "extension-api.d.ts"
-
-// todo: register custom icon in cluster-menu
-// todo: register custom view by clicking the item
-
-export default class ExampleExtension extends LensExtension {
-  async enable(runtime: /*LensRuntimeRendererEnv*/ any): Promise<any> {
-    try {
-      super.enable(runtime);
-      runtime.logger.info('EXAMPLE EXTENSION: ENABLE() override');
-    } catch (err){
-      console.error(err)
-    }
-  }
-}
-
-// <Icon material="camera" onClick={() => console.log("done")}/>

src/extensions/example-extension/example-extension.tsx

@@ -0,0 +1,47 @@
+import { Button, DynamicPageType, Icon, LensExtension } from "@lens/extensions"; // fixme: map to generated types from "extension-api.ts"
+import React from "react";
+import path from "path";
+
+export default class ExampleExtension extends LensExtension {
+  onActivate() {
+    console.log('EXAMPLE EXTENSION: ACTIVATED', this.getMeta());
+    this.registerPage({
+      type: DynamicPageType.CLUSTER,
+      path: "/extension-example",
+      menuTitle: "Example Extension",
+      components: {
+        Page: () => <ExtensionPage extension={this}/>,
+        MenuIcon: ExtensionIcon,
+      }
+    })
+  }
+
+  onDeactivate() {
+    console.log('EXAMPLE EXTENSION: DEACTIVATED', this.getMeta());
+  }
+}
+
+export function ExtensionIcon(props: {} /*IconProps |*/) {
+  return <Icon {...props} material="camera" tooltip={path.basename(__filename)}/>
+}
+
+export class ExtensionPage extends React.Component<{ extension: ExampleExtension }> {
+  deactivate = () => {
+    const { extension } = this.props;
+    extension.runtime.navigate("/")
+    extension.disable();
+  }
+
+  render() {
+    const { MainLayout } = this.props.extension.runtime.components;
+    return (
+      <MainLayout className="ExampleExtension">
+        <div className="flex column gaps align-flex-start">
+          <p>Hello from extensions-api!</p>
+          <p>File: <i>{__filename}</i></p>
+          <Button accent label="Deactivate" onClick={this.deactivate}/>
+        </div>
+      </MainLayout>
+    )
+  }
+}

src/extensions/example-extension/package.json

@@ -2,9 +2,10 @@
   "name": "extension-example",
   "version": "1.0.0",
   "description": "Example extension",
-  "main": "example-extension.ts",
+  "main": "example-extension.js",
   "lens": {
-    "metadata": {}
+    "metadata": {},
+    "styles": []
   },
   "dependencies": {
   }

src/extensions/example-extension/tsconfig.json

@@ -8,6 +8,6 @@
   },
   "include": [
     "../../../types",
-    "./example-extension.ts"
+    "./example-extension.tsx"
   ]
 }

src/extensions/extension-api.ts

@@ -2,7 +2,8 @@
 export type { LensRuntimeRendererEnv } from "./lens-runtime";
 
 // APIs
-export * from "./extension"
+export * from "./lens-extension"
+export { DynamicPageType } from "./register-page";
 
 // Common UI components
 export * from "../renderer/components/icon"

src/extensions/extension-store.ts

@@ -3,17 +3,17 @@ import path from "path";
 import fs from "fs-extra";
 import { action, observable, reaction, toJS, } from "mobx";
 import { BaseStore } from "../common/base-store";
-import { ExtensionId, ExtensionManifest, ExtensionVersion, LensExtension } from "./extension";
-import { isDevelopment, isProduction, isTestEnv } from "../common/vars";
+import { ExtensionId, ExtensionManifest, ExtensionVersion, LensExtension } from "./lens-extension";
+import { isDevelopment } from "../common/vars";
 import logger from "../main/logger";
 
 export interface ExtensionStoreModel {
   version: ExtensionVersion;
-  extensions: Record<ExtensionId, ExtensionModel>
+  extensions: [ExtensionId, ExtensionModel][]
 }
 
 export interface ExtensionModel {
-  id?: ExtensionId; // available in lens-extension instance
+  id: ExtensionId;
   version: ExtensionVersion;
   name: string;
   manifestPath: string;
@@ -35,7 +35,6 @@ export class ExtensionStore extends BaseStore<ExtensionStoreModel> {
   private constructor() {
     super({
       configName: "lens-extension-store",
-      syncEnabled: false,
     });
   }
 
@@ -48,7 +47,7 @@ export class ExtensionStore extends BaseStore<ExtensionStoreModel> {
     if (isDevelopment) {
       return path.resolve(__static, "../src/extensions");
     }
-    return path.resolve(__static, "../extensions"); //todo figure out prod
+    return path.resolve(__static, "../extensions");
   }
 
   async load() {
@@ -80,7 +79,6 @@ export class ExtensionStore extends BaseStore<ExtensionStoreModel> {
     try {
       manifestJson = __non_webpack_require__(manifestPath); // "__non_webpack_require__" converts to native node's require()-call
       mainJs = path.resolve(path.dirname(manifestPath), manifestJson.main);
-      mainJs = mainJs.replace(/\.ts$/i, ".js"); // todo: compile *.ts on the fly?
       const extensionModule = __non_webpack_require__(mainJs);
       return {
         manifestPath: manifestPath,
@@ -132,7 +130,7 @@ export class ExtensionStore extends BaseStore<ExtensionStoreModel> {
       this.version = version;
     }
     if (extensions) {
-      const currentExtensions = new Map(Object.entries(extensions));
+      const currentExtensions = new Map(extensions);
       this.extensions.forEach(extension => {
         if (!currentExtensions.has(extension.id)) {
           this.removed.set(extension.id, extension);
@@ -164,7 +162,7 @@ export class ExtensionStore extends BaseStore<ExtensionStoreModel> {
   toJSON(): ExtensionStoreModel {
     return toJS({
       version: this.version,
-      extensions: this.extensions.toJSON(),
+      extensions: Array.from(this.extensions).map(([id, instance]) => [id, instance.toJSON()]),
     }, {
       recurseEverything: true,
     })

src/extensions/lens-extension.ts

@@ -1,17 +1,20 @@
 import type { ExtensionModel } from "./extension-store";
 import type { LensRuntimeRendererEnv } from "./lens-runtime";
+import type { PageRegistration } from "./register-page";
 import { readJsonSync } from "fs-extra";
 import { action, observable, toJS } from "mobx";
 import extensionManifest from "./example-extension/package.json"
 import logger from "../main/logger";
 
-export type ExtensionId = string; // instance-id or abs path to "%lens-extension/manifest.json"
+export type ExtensionId = string | ExtensionPackageJsonPath;
+export type ExtensionPackageJsonPath = string;
 export type ExtensionVersion = string | number;
 export type ExtensionManifest = typeof extensionManifest & ExtensionModel;
 
 export class LensExtension implements ExtensionModel {
   public id: ExtensionId;
   public updateUrl: string;
+  protected disposers: Function[] = [];
 
   @observable name = "";
   @observable description = "";
@@ -19,7 +22,7 @@ export class LensExtension implements ExtensionModel {
   @observable manifest: ExtensionManifest;
   @observable manifestPath: string;
   @observable isEnabled = false;
-  @observable.ref runtime: Partial<LensRuntimeRendererEnv> = {};
+  @observable.ref runtime: LensRuntimeRendererEnv;
 
   constructor(model: ExtensionModel, manifest: ExtensionManifest) {
     this.importModel(model, manifest);
@@ -41,14 +44,27 @@ export class LensExtension implements ExtensionModel {
     this.isEnabled = true;
     this.runtime = runtime;
     console.log(`[EXTENSION]: enabled ${this.name}@${this.version}`, this.getMeta());
+    this.onActivate();
   }
 
   async disable() {
+    this.onDeactivate();
     this.isEnabled = false;
-    this.runtime = {};
+    this.runtime = null;
+    this.disposers.forEach(cleanUp => cleanUp());
+    this.disposers.length = 0;
     console.log(`[EXTENSION]: disabled ${this.name}@${this.version}`, this.getMeta());
   }
 
+  // todo: add more hooks
+  protected onActivate() {
+    // mock
+  }
+
+  protected onDeactivate() {
+    // mock
+  }
+
   // todo
   async install(downloadUrl?: string) {
     return;
@@ -76,7 +92,7 @@ export class LensExtension implements ExtensionModel {
   }
 
   toJSON(): ExtensionModel {
-    return {
+    return toJS({
       id: this.id,
       name: this.name,
       version: this.version,
@@ -84,6 +100,16 @@ export class LensExtension implements ExtensionModel {
       manifestPath: this.manifestPath,
       enabled: this.isEnabled,
       updateUrl: this.updateUrl,
+    }, {
+      recurseEverything: true,
+    })
+  }
+
+  // Runtime helpers
+  protected registerPage(params: PageRegistration, autoDisable = true) {
+    const dispose = this.runtime.dynamicPages.register(params);
+    if (autoDisable) {
+      this.disposers.push(dispose);
     }
   }
 }

src/extensions/lens-runtime.ts

@@ -1,19 +1,26 @@
-// Lens runtime for injecting to extension on activation
-import { apiManager } from "../renderer/api/api-manager";
+// Lens renderer runtime params available to extensions after activation
+
 import logger from "../main/logger";
-import { dynamicPages } from "../renderer/components/cluster-manager/register-page";
+import { dynamicPages } from "./register-page";
+import { MainLayout } from "../renderer/components/layout/main-layout";
+import { navigate } from "../renderer/navigation";
 
 export interface LensRuntimeRendererEnv {
-  apiManager: typeof apiManager;
+  navigate: typeof navigate;
   logger: typeof logger;
   dynamicPages: typeof dynamicPages
+  components: {
+    MainLayout: typeof MainLayout
+  }
 }
 
-// todo: expose more public runtime apis: stores, managers, etc.
 export function getLensRuntime(): LensRuntimeRendererEnv {
   return {
-    apiManager,
     logger,
+    navigate,
     dynamicPages,
+    components: {
+      MainLayout // fixme: refactor, import as pure component from "@lens/extensions"
+    }
   }
 }

src/extensions/register-page.tsx

@@ -0,0 +1,46 @@
+// Extensions-api -> Dynamic pages
+
+import { computed, observable } from "mobx";
+import React from "react";
+import type { IconProps } from "../renderer/components/icon";
+
+export enum DynamicPageType {
+  GLOBAL = "lens-scope",
+  CLUSTER = "cluster-view-scope",
+}
+
+export interface PageRegistration {
+  path: string; // route-path
+  menuTitle: string;
+  type: DynamicPageType;
+  components: PageComponents;
+}
+
+export interface PageComponents {
+  Page: React.ComponentType<any>;
+  MenuIcon: React.ComponentType<IconProps>;
+}
+
+export class PagesStore {
+  protected pages = observable.array<PageRegistration>([], { deep: false });
+
+  @computed get globalPages() {
+    return this.pages.filter(page => page.type === DynamicPageType.GLOBAL);
+  }
+
+  @computed get clusterPages() {
+    return this.pages.filter(page => page.type === DynamicPageType.CLUSTER);
+  }
+
+  // todo: verify paths to avoid collision with existing pages
+  register(params: PageRegistration) {
+    this.pages.push(params);
+    return () => {
+      this.pages.replace(
+        this.pages.filter(page => page.components !== params.components)
+      )
+    };
+  }
+}
+
+export const dynamicPages = new PagesStore();