Implement getGroups function

Author: suufi

lib/user/getGroups.js

@@ -0,0 +1,46 @@
+// Includes
+var http = require('../util/http.js').func
+var getGeneralToken = require('../util/getGeneralToken.js').func
+
+// Args
+exports.required = ['userId']
+exports.optional = ['jar']
+
+// Define
+function getGroups (jar, token, userId) {
+  return new Promise((resolve, reject) => {
+    var httpOpt = {
+      url: `//api.roblox.com/users/${userId}/groups`,
+      options: {
+        method: 'GET',
+        jar: jar,
+        headers: {
+          'X-CSRF-TOKEN': token
+        },
+        resolveWithFullResponse: true
+      }
+    }
+    return http(httpOpt)
+      .then(function (res) {
+        if (res.statusCode === 200) {
+          resolve(JSON.parse(res.body))
+        } else {
+          const body = JSON.parse(res.body) || {}
+          if (body.errors && body.errors.length > 0) {
+            var errors = body.errors.map((e) => {
+              return e.message
+            })
+            reject(new Error(`${res.statusCode} ${errors.join(', ')}`))
+          }
+        }
+      })
+  })
+}
+
+exports.func = function (args, senderUserId) {
+  var jar = args.jar
+  return getGeneralToken({ jar: jar })
+    .then(function (xcsrf) {
+      return getGroups(jar, xcsrf, args.userId)
+    })
+}