added microsoft driver for authentication

drivers/microsoft.go

@@ -0,0 +1,34 @@
+package drivers
+
+import (
+	"net/http"
+
+	"github.com/danilopolani/gocialite/structs"
+	"golang.org/x/oauth2/microsoft"
+)
+
+const microsoftDriverName = "microsoft"
+
+func init() {
+	registerDriver(microsoftDriverName, MicrosoftDefaultScopes, MicrosoftUserFn, microsoft.AzureADEndpoint("common"), MicrosoftAPIMap, MicrosoftUserMap)
+}
+
+// MicrosoftUserMap is the map to create the User struct
+var MicrosoftUserMap = map[string]string{
+	"id":                "ID",
+	"givenName":         "Username",
+	"displayName":       "FullName",
+	"userPrincipalName": "Email",
+}
+
+// MicrosoftAPIMap is the map for API endpoints
+var MicrosoftAPIMap = map[string]string{
+	"endpoint":     "https://graph.microsoft.com",
+	"userEndpoint": "/v1.0/me",
+}
+
+// MicrosoftUserFn is a callback to parse additional fields for User
+var MicrosoftUserFn = func(client *http.Client, u *structs.User) {}
+
+// MicrosoftDefaultScopes contains the default scopes
+var MicrosoftDefaultScopes = []string{"User.Read"}