feat: Support Azure single-tenant application using the Graph API (#6728) (#6878)

lib/microsoft_graph_api.rb

@@ -0,0 +1,62 @@
+# Simple HTTPS API helper class for interacting with MS Graph.
+# Uses the standard ruby HTTP library for interacting with the API.
+
+require 'uri'
+require 'net/http'
+
+class MicrosoftGraphApi
+  API_VERSION = 'v1.0'.freeze
+  API_PORT = 443
+  API_URL = "https://graph.microsoft.com/#{API_VERSION}".freeze
+
+  def initialize(token)
+    @token = token
+  end
+
+  # Simple get request to the endpoint
+  #
+  # 'queries' are the get variables after the main url
+  # eg. foo/bar?query=myquery
+  def get_from_api(endpoint, headers = {}, query = {})
+    uri = endpoint_to_uri(endpoint, query)
+    https = setup_https(uri.host)
+    request = Net::HTTP::Get.new(uri.request_uri)
+
+    # Assign each header to the request
+    headers.each { |key, value| request[key.to_s] = value.to_s }
+    request['Authorization'] = "Bearer #{@token}"
+
+    https.request(request)
+  end
+
+  # Simple post request to the endpoint
+  def post_to_api(endpoint, headers = {}, body = '')
+    uri = endpoint_to_uri(endpoint)
+    https = setup_https(uri.host)
+    request = Net::HTTP::Post.new(uri.path)
+
+    # Assign each header to the request
+    headers.each { |key, value| request[key.to_s] = value.to_s }
+    request['Authorization'] = "Bearer #{@token}"
+
+    request.body = body
+    https.request(request)
+  end
+
+  private
+
+  def setup_https(host)
+    https = Net::HTTP.new(host, API_PORT)
+    https.use_ssl = true
+    https
+  end
+
+  def endpoint_to_uri(endpoint, query = {})
+    endpoint.delete_prefix('/')
+    uri = URI("#{API_URL}/#{endpoint}")
+    return uri if query.empty?
+
+    uri.query = URI.encode_www_form(query)
+    uri
+  end
+end