1 files changed, 30 insertions, 0 deletions
diff --git a/src/models/user_token.cr b/src/models/user_token.cr
new file mode 100644
index 0000000..6586303
--- /dev/null
+++ b/src/models/user_token.cr
@@ -0,0 +1,30 @@
+# Generates and decodes JSON Web Tokens for Authenticating users.
+class UserToken
+  Habitat.create { setting stubbed_token : String? }
+  ALGORITHM = JWT::Algorithm::HS256
+
+  def self.generate(user : User) : String
+    payload = {"user_id" => user.id}
+
+    settings.stubbed_token || create_token(payload)
+  end
+
+  def self.create_token(payload)
+    JWT.encode(payload, Lucky::Server.settings.secret_key_base, ALGORITHM)
+  end
+
+  def self.decode_user_id(token : String) : Int64?
+    payload, _header = JWT.decode(token, Lucky::Server.settings.secret_key_base, ALGORITHM)
+    payload["user_id"].to_s.to_i64
+  rescue e : JWT::Error
+    Lucky::Log.dexter.error { {jwt_decode_error: e.message} }
+    nil
+  end
+
+  # Used in tests to return a fake token to test against.
+  def self.stub_token(token : String, &)
+    temp_config(stubbed_token: token) do
+      yield
+    end
+  end
+end