From 0ac55719469cb2074debddfdf34997823f44ea9f Mon Sep 17 00:00:00 2001
From: Alex Andreev <alex.andreev.email@gmail.com>
Date: Thu, 17 Feb 2022 12:03:30 +0300
Subject: [PATCH] Introduce BundledExtensionParser

Signed-off-by: Alex Andreev <alex.andreev.email@gmail.com>
---
 .../__tests__/extension-parser.test.ts        | 52 +++++++++++++++++
 .../bundled-extension-parser.ts               | 57 +++++++++++++++++++
 2 files changed, 109 insertions(+)
 create mode 100644 src/main/extension-updater/__tests__/extension-parser.test.ts
 create mode 100644 src/main/extension-updater/bundled-extension-parser.ts

diff --git a/src/main/extension-updater/__tests__/extension-parser.test.ts b/src/main/extension-updater/__tests__/extension-parser.test.ts
new file mode 100644
index 0000000000..e6741f429a
--- /dev/null
+++ b/src/main/extension-updater/__tests__/extension-parser.test.ts
@@ -0,0 +1,52 @@
+/**
+ * Copyright (c) OpenLens Authors. All rights reserved.
+ * Licensed under MIT License. See LICENSE in root directory for more information.
+ */
+
+import { BundledExtensionParser } from "../bundled-extension-parser";
+import fetchMock from "fetch-mock";
+
+fetchMock.config.overwriteRoutes = true;
+
+describe("BundledExtensionParser", () => {
+  afterAll(() => {
+    fetchMock.reset();
+  });
+
+  it("Should return empty arrays if no url passed", async () => {
+    const lists = await new BundledExtensionParser("5.4.0-latest12345", "").getExtensionLists();
+
+    expect(lists).toEqual({
+      release: [],
+      available: [],
+    });
+  });
+
+  it("Should return empty releases array if no release json found", async () => {
+    fetchMock
+      .get("http://my-example-url.com/versions.json", [ { "node-menu": "0.0.1" } ] )
+      .get("http://my-example-url.com/5.4.0-latest12345.json", 408 );
+
+
+    const lists = await new BundledExtensionParser("5.4.0-latest12345", "http://my-example-url.com").getExtensionLists();
+
+    expect(lists).toEqual({
+      release: [],
+      available: [{ "node-menu": "0.0.1" }],
+    });
+  });
+
+  it("Should return empty available array if no versions json found", async () => {
+    fetchMock
+      .get("http://my-example-url.com/versions.json", 408 )
+      .get("http://my-example-url.com/5.4.0-latest12345.json", [ { "node-menu": "0.0.1" } ]);
+
+
+    const lists = await new BundledExtensionParser("5.4.0-latest12345", "http://my-example-url.com").getExtensionLists();
+
+    expect(lists).toEqual({
+      release: [{ "node-menu": "0.0.1" }],
+      available: [],
+    });
+  });
+});
diff --git a/src/main/extension-updater/bundled-extension-parser.ts b/src/main/extension-updater/bundled-extension-parser.ts
new file mode 100644
index 0000000000..84d1caf625
--- /dev/null
+++ b/src/main/extension-updater/bundled-extension-parser.ts
@@ -0,0 +1,57 @@
+/**
+ * Copyright (c) OpenLens Authors. All rights reserved.
+ * Licensed under MIT License. See LICENSE in root directory for more information.
+ */
+
+import logger from "../logger";
+
+type Extensions = Record<string, string>[];
+
+interface ExtensionList {
+  release: Extensions,
+  available: Extensions
+}
+
+export class BundledExtensionParser {
+  constructor(private lensVersion: string, private url: string) {
+  }
+
+  get releaseJsonUrl() {
+    return `${this.url}/${this.lensVersion}.json`;
+  }
+
+  get availableJsonUrl() {
+    return `${this.url}/versions.json`;
+  }
+
+  fetchJsonList(path: string): Promise<Extensions> {
+    return fetch(path, { method: "GET" }).then(response => {
+      if (response.ok) {
+        return response.json();
+      }
+
+      return [];
+    }).catch(error => {
+      logger.error(`[EXTENSION-PARSER]: Failed to download and parse extension list: ${error}`);
+
+      return [];
+    });
+  }
+
+  public async getExtensionLists(): Promise<ExtensionList> {
+    if (!this.url) {
+      return {
+        release: [],
+        available: [],
+      };
+    }
+
+    const release = await this.fetchJsonList(this.releaseJsonUrl);
+    const available = await this.fetchJsonList(this.availableJsonUrl);
+
+    return {
+      release,
+      available,
+    };
+  }
+}