From 5e32f88b0dd795075ddee2fd48f961e17454c145 Mon Sep 17 00:00:00 2001
From: Jason Volk <jason@zemos.net>
Date: Wed, 1 Feb 2023 11:10:24 -0800
Subject: [PATCH] modules/client: Add stub for dehydrated device.

---
 matrix/matrix.cc                    |  1 +
 modules/Makefile.am                 |  2 +
 modules/client/dehydrated_device.cc | 68 +++++++++++++++++++++++++++++
 3 files changed, 71 insertions(+)
 create mode 100644 modules/client/dehydrated_device.cc

diff --git a/matrix/matrix.cc b/matrix/matrix.cc
index ceefa1f04..71aafe5c2 100644
--- a/matrix/matrix.cc
+++ b/matrix/matrix.cc
@@ -123,6 +123,7 @@ ircd::m::module_names
 	"client_devices",
 	"client_delete_devices",
 	"client_send_to_device",
+	"client_dehydrated_device",
 	"client_keys_changes",
 	"client_keys_upload",
 	"client_keys_claim",
diff --git a/modules/Makefile.am b/modules/Makefile.am
index 99c354c56..01bc92f57 100644
--- a/modules/Makefile.am
+++ b/modules/Makefile.am
@@ -284,6 +284,7 @@ client_client_delete_devices_la_SOURCES = client/delete_devices.cc
 client_client_notifications_la_SOURCES = client/notifications.cc
 client_client_register_email_la_SOURCES = client/register_email.cc
 client_client_create_group_la_SOURCES = client/create_group.cc
+client_client_dehydrated_device_la_SOURCES = client/dehydrated_device.cc
 
 client_module_LTLIBRARIES = \
 	client/client_versions.la \
@@ -311,6 +312,7 @@ client_module_LTLIBRARIES = \
 	client/client_notifications.la \
 	client/client_register_email.la \
 	client/client_create_group.la \
+	client/client_dehydrated_device.la \
 	###
 
 #
diff --git a/modules/client/dehydrated_device.cc b/modules/client/dehydrated_device.cc
new file mode 100644
index 000000000..ed49dbd97
--- /dev/null
+++ b/modules/client/dehydrated_device.cc
@@ -0,0 +1,68 @@
+// Matrix Construct
+//
+// Copyright (C) Matrix Construct Developers, Authors & Contributors
+// Copyright (C) 2016-2023 Jason Volk <jason@zemos.net>
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice is present in all copies. The
+// full license for this software is available in the LICENSE file.
+
+namespace ircd::m
+{
+	static resource::response get__dehydrated_device(client &, const m::resource::request &);
+	extern resource::method dehydrated_device_get;
+
+	extern resource dehydrated_device_resource;
+}
+
+ircd::mapi::header
+IRCD_MODULE
+{
+	"Client :Dehydrated Device"
+};
+
+decltype(ircd::m::dehydrated_device_resource)
+ircd::m::dehydrated_device_resource
+{
+	"/_matrix/client/unstable/org.matrix.msc2697.v2/dehydrated_device",
+	{
+		"msc2697.v2 :Dehydrated Device"
+	}
+};
+
+decltype(ircd::m::dehydrated_device_get)
+ircd::m::dehydrated_device_get
+{
+	dehydrated_device_resource, "GET", get__dehydrated_device,
+	{
+		dehydrated_device_get.REQUIRES_AUTH
+	}
+};
+
+ircd::m::resource::response
+ircd::m::get__dehydrated_device(client &client,
+                                const resource::request &request)
+{
+	const auto device_id
+	{
+		user::tokens::device(request.access_token)
+	};
+
+	const auto algorithm
+	{
+		"m.dehydration.v1.olm"
+	};
+
+	return resource::response
+	{
+		client, json::members
+		{
+			{ "device_id", device_id },
+			{ "device_data",
+			{
+				{ "algorithm", algorithm },
+			}}
+		}
+	};
+}