Add function to retrieve appstore user access token

src/appstore.js

@@ -16,6 +16,7 @@ exports = module.exports = {
     purchaseApp: purchaseApp,
     unpurchaseApp: unpurchaseApp,
 
+    getUserToken: getUserToken,
     getSubscription: getSubscription,
     isFreePlan: isFreePlan,
 
@@ -37,7 +38,6 @@ var apps = require('./apps.js'),
     eventlog = require('./eventlog.js'),
     groups = require('./groups.js'),
     mail = require('./mail.js'),
-    moment = require('moment'),
     os = require('os'),
     paths = require('./paths.js'),
     safe = require('safetydance'),
@@ -130,6 +130,23 @@ function registerUser(email, password, callback) {
     });
 }
 
+function getUserToken(callback) {
+    assert.strictEqual(typeof callback, 'function');
+
+    getCloudronToken(function (error, token) {
+        if (error) return callback(error);
+
+        const url = `${settings.apiServerOrigin()}/api/v1/user_token`;
+
+        superagent.post(url).send({}).query({ accessToken: token }).timeout(30 * 1000).end(function (error, result) {
+            if (error && !error.response) return callback(new BoxError(BoxError.NETWORK_ERROR, error.message));
+            if (result.statusCode !== 201) return callback(new BoxError(BoxError.EXTERNAL_ERROR, `getUserToken status code: ${result.status}`));
+
+            callback(null, result.body.accessToken);
+        });
+    });
+}
+
 function getSubscription(callback) {
     assert.strictEqual(typeof callback, 'function');