From be716eb21a7369d893a9b5fdc782b6f730071e48 Mon Sep 17 00:00:00 2001
From: yunakim714 <yunakim@salesforce.com>
Date: Tue, 10 Sep 2024 16:14:00 -0400
Subject: [PATCH] add social login helper

---
 src/static/helpers/slasHelper.test.ts |  4 ++
 src/static/helpers/slasHelper.ts      | 66 +++++++++++++++++++++++++++
 2 files changed, 70 insertions(+)

diff --git a/src/static/helpers/slasHelper.test.ts b/src/static/helpers/slasHelper.test.ts
index e84251b..5cad49e 100644
--- a/src/static/helpers/slasHelper.test.ts
+++ b/src/static/helpers/slasHelper.test.ts
@@ -435,6 +435,10 @@ describe('Registered B2C user flow', () => {
   });
 });
 
+describe('Social login user flow', () => {
+  
+})
+
 describe('Refresh Token', () => {
   test('refreshes the token with slas public client', () => {
     const expectedBody = {
diff --git a/src/static/helpers/slasHelper.ts b/src/static/helpers/slasHelper.ts
index fe12b1a..dedb4d4 100644
--- a/src/static/helpers/slasHelper.ts
+++ b/src/static/helpers/slasHelper.ts
@@ -359,6 +359,72 @@ export async function loginRegisteredUserB2C(
   return slasClient.getAccessToken({body: tokenBody});
 }
 
+/**
+ * A single function to execute the ShopperLogin External IDP Login with proof key for code exchange flow as described in the [API documentation](https://developer.salesforce.com/docs/commerce/commerce-api/references?meta=shopper-login:Summary).
+ * **Note**: this func can run on client side. Only use private slas when the slas client secret is secured.
+ * @param slasClient a configured instance of the ShopperLogin SDK client.
+ * @param credentials - the clientSecret (if applicable) to login with.
+ * @param credentials.clientSecret? - secret associated with client ID
+ * @param parameters - parameters to pass in the API calls.
+ * @param parameters.redirectURI - Per OAuth standard, a valid app route. Must be listed in your SLAS configuration. On server, this will not be actually called. On browser, this will be called, but ignored.
+ * @param parameters.hint - Name of an identity provider (IDP) to redirect to
+ * @param parameters.usid? - Unique Shopper Identifier to enable personalization.
+ * @param parameters.dnt? - Optional parameter to enable Do Not Track (DNT) for the user.
+ * @returns TokenResponse
+ */
+export async function loginIDPUser(
+  slasClient: ShopperLogin<{
+    shortCode: string;
+    organizationId: string;
+    clientId: string;
+    siteId: string;
+  }>,
+  credentials: {
+    clientSecret?: string;
+  },
+  parameters: {
+    redirectURI: string;
+    hint: string;
+    usid?: string;
+    dnt?: boolean;
+  }
+): Promise<TokenResponse> {
+  const codeVerifier = createCodeVerifier();
+
+  const authResponse = await authorize(slasClient, codeVerifier, {
+    redirectURI: parameters.redirectURI,
+    hint: parameters.hint,
+    ...(parameters.usid && {usid: parameters.usid}),
+  });
+
+  const tokenBody: TokenRequest = {
+    client_id: slasClient.clientConfig.parameters.clientId,
+    channel_id: slasClient.clientConfig.parameters.siteId,
+    code: authResponse.code,
+    code_verifier: codeVerifier,
+    grant_type: 'authorization_code_pkce',
+    redirect_uri: parameters.redirectURI,
+    usid: authResponse.usid,
+    ...(parameters.dnt !== undefined && {dnt: parameters.dnt.toString()}),
+  };
+
+  // using slas private client
+  if (credentials.clientSecret) {
+    const authHeaderIdSecret = `Basic ${stringToBase64(
+      `${slasClient.clientConfig.parameters.clientId}:${credentials.clientSecret}`
+    )}`;
+
+    const optionsToken = {
+      headers: {
+        Authorization: authHeaderIdSecret,
+      },
+      body: tokenBody,
+    };
+    return slasClient.getAccessToken(optionsToken);
+  }
+  return slasClient.getAccessToken({body: tokenBody})
+}
+
 /**
  * Exchange a refresh token for a new access token.
  * **Note**: this func can run on client side. Only use private slas when the slas client secret is secured.