Adding initial thoughts on Kiota JS for Graph

design/kiota-e2e.md

@@ -0,0 +1,147 @@
+# End-to-end usage of kiota-generated SDKs in Javascript
+
+While working with the Kiota + Javascript teams, it became clear that we needed more context and provide a better vision on how we should be using a kiota-generated SDK. This design document aims at providing clarity and a better understanding on how developers will be using our SDKs and the underlying kiota packages.
+
+## Constraints
+
+Before we jump into the end-to-end walk-through, it's important to set some constraints.
+
+| Type      | Description                                                                                                                                   |
+| --------- | --------------------------------------------------------------------------------------------------------------------------------------------- |
+| Platforms | Node : Current and Previous LTS (14 / 16)<br /> Web : Edge, Chrome, Firefox and Safari (Latest released version + immediate previous version) |
+| Modules   | Node : CommonJS<br /> Web : ES Module (ES6)                                                                                                   |
+| Types     | Typings should be available for both the core and the service libraries for Graph models                                                      |
+
+## NodeJS e2e using the Service library
+
+```bash
+npm install @microsoft/msgraph-sdk-typescript --save
+npm install @microsoft/kiota-authentication-azure --save
+```
+
+```typescript
+// App.ts
+
+import { Client, User, Message, BodyType } from "@microsoft/msgraph-sdk-javascript";
+import { AzureIdentityAuthenticationProvider } from "@microsoft/kiota-authentication-azure";
+import { DeviceCodeCredential } from "@azure/identity";
+
+const deviceCodeCredentials = new DeviceCodeCredential({
+	tenantId: "b61f9af1-d6cf-4cc0-a6f6-befb38bc00ed",
+	clientId: "bde251a6-0ef9-42a8-a40b-9ad9bb594b2c",
+});
+
+const scopes = ["User.Read", "Mail.Send"];
+
+const graphClient = Client.init({
+	accessTokenProvider: new AzureIdentityAccessTokenProvider(deviceCodeCredentials, scopes),
+});
+
+const me = await getMe();
+const meRaw = await getMeRaw();
+await sendMail();
+await sendMailRaw();
+
+async function getMe(): Promise<User | undefined> {
+	return await graphClient.me.get();
+}
+
+async function getMe(): Promise<User | undefined> {
+	return await graphClient.api("/me").get();
+}
+
+async function sendMail(): Promise<void> {
+	const message: Message = {
+		subject: "Hello Graph TypeScript SDK!",
+		body: {
+			contentType: BodyType.Html,
+			content: "<bold>Hello Graph TypeScript SDK!</bold>",
+		},
+		toRecipients: [
+			{
+				emailAddress: {
+					address: "[email protected]",
+				},
+			},
+		],
+	};
+
+	return await client.me.sendMail.post(message);
+}
+
+async function sendMailRaw(): Promise<void> {
+	const message: Message = {
+		subject: "Hello Graph TypeScript SDK!",
+		body: {
+			contentType: BodyType.Html,
+			content: "<bold>Hello Graph TypeScript SDK!</bold>",
+		},
+		toRecipients: [
+			{
+				emailAddress: {
+					address: "[email protected]",
+				},
+			},
+		],
+	};
+
+	return await client.api("/me/sendMail").post({
+		message: message,
+	});
+}
+```
+
+## NodeJS e2e using the Core library
+
+```bash
+npm install @microsoft/msgraph-sdk-javascript-core --save
+npm install @microsoft/msgraph-sdk-javascript-types --save
+npm install @microsoft/kiota-authentication-azure --save
+```
+
+```typescript
+// App.ts
+
+import { Client } from "@microsoft/msgraph-sdk-javascript-core";
+import { AzureIdentityAuthenticationProvider } from "@microsoft/kiota-authentication-azure";
+import { DeviceCodeCredential } from "@azure/identity";
+
+const deviceCodeCredentials = new DeviceCodeCredential({
+	tenantId: "b61f9af1-d6cf-4cc0-a6f6-befb38bc00ed",
+	clientId: "bde251a6-0ef9-42a8-a40b-9ad9bb594b2c",
+});
+
+const scopes = ["User.Read", "Mail.Send"];
+
+const graphClient = Client.init({
+	accessTokenProvider: new AzureIdentityAccessTokenProvider(deviceCodeCredentials, scopes),
+});
+
+const me = await getMe();
+await sendMail();
+
+async function getMe(): Promise<User | undefined> {
+	return await graphClient.api("/me").get();
+}
+
+async function sendMail(): Promise<void> {
+	const message: Message = {
+		subject: "Hello Graph TypeScript SDK!",
+		body: {
+			contentType: BodyType.Html,
+			content: "<bold>Hello Graph TypeScript SDK!</bold>",
+		},
+		toRecipients: [
+			{
+				emailAddress: {
+					address: "[email protected]",
+				},
+			},
+		],
+	};
+
+	return await client.api("/me/sendMail").post({
+		message: message,
+	});
+}
+```