Support for OAuth 2.0 (#5)

plugins/auth-oauth2/src/grants/clientCredentials.ts

@@ -0,0 +1,40 @@
+import { Context } from '@yaakapp/api';
+import { getAccessToken } from '../getAccessToken';
+import { getToken, storeToken } from '../store';
+
+export async function getClientCredentials(
+  ctx: Context,
+  contextId: string,
+  {
+    accessTokenUrl,
+    clientId,
+    clientSecret,
+    scope,
+    credentialsInBody,
+  }: {
+    accessTokenUrl: string;
+    clientId: string;
+    clientSecret: string;
+    scope: string | null;
+    credentialsInBody: boolean;
+  },
+) {
+  const token = await getToken(ctx, contextId);
+  if (token) {
+    // resolve(token.response.access_token);
+    // TODO: Refresh token if expired
+    // return;
+  }
+
+  const response = await getAccessToken(ctx, {
+    grantType: 'client_credentials',
+    accessTokenUrl,
+    clientId,
+    clientSecret,
+    scope,
+    credentialsInBody,
+    params: [],
+  });
+
+  return storeToken(ctx, contextId, response);
+}