Support for OAuth 2.0 (#5)

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

@@ -0,0 +1,52 @@
+import { Context } from '@yaakapp/api';
+import { getAccessToken } from '../getAccessToken';
+import { getOrRefreshAccessToken } from '../getOrRefreshAccessToken';
+import { AccessToken, storeToken } from '../store';
+
+export async function getPassword(
+  ctx: Context,
+  contextId: string,
+  {
+    accessTokenUrl,
+    clientId,
+    clientSecret,
+    username,
+    password,
+    credentialsInBody,
+    scope,
+  }: {
+    accessTokenUrl: string;
+    clientId: string;
+    clientSecret: string;
+    username: string;
+    password: string;
+    scope: string | null;
+    credentialsInBody: boolean;
+  },
+): Promise<AccessToken> {
+  const token = await getOrRefreshAccessToken(ctx, contextId, {
+    accessTokenUrl,
+    scope,
+    clientId,
+    clientSecret,
+    credentialsInBody,
+  });
+  if (token != null) {
+    return token;
+  }
+
+  const response = await getAccessToken(ctx, {
+    accessTokenUrl,
+    clientId,
+    clientSecret,
+    scope,
+    grantType: 'password',
+    credentialsInBody,
+    params: [
+      { name: 'username', value: username },
+      { name: 'password', value: password },
+    ],
+  });
+
+  return storeToken(ctx, contextId, response);
+}