--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mod_adhoc_oauth2_client/mod_adhoc_oauth2_client.lua	Sun Nov 22 00:50:45 2020 +0100
@@ -0,0 +1,48 @@
+local adhoc = require "util.adhoc";
+local dataforms = require "util.dataforms";
+local errors = require "util.error";
+local id = require "util.id";
+local jid = require "util.jid";
+
+local clients = module:open_store("oauth2_clients", "map");
+
+local new_client = dataforms.new({
+	title = "Create OAuth2 client";
+	{var = "FORM_TYPE"; type = "hidden"; value = "urn:uuid:ff0d55ed-2187-4ee0-820a-ab633a911c14#create"};
+	{name = "name"; type = "text-single"; label = "Client name"; required = true};
+	{name = "description"; type = "text-multi"; label = "Description"};
+	{name = "info_url"; type = "text-single"; label = "Informative URL"; desc = "Link to information about your client"};
+	{name = "redirect_uri"; type = "text-single"; label = "Redirection URI"; desc = "Where to redirect the user after authorizing."; required = true};
+})
+
+local client_created = dataforms.new({
+	title = "New OAuth2 client created";
+	instructions = "Save these details, they will not be shown again";
+	{var = "FORM_TYPE"; type = "hidden"; value = "urn:uuid:ff0d55ed-2187-4ee0-820a-ab633a911c14#created"};
+	{name = "client_id"; type = "text-single"; label = "Client ID"};
+	{name = "client_secret"; type = "text-single"; label = "Client secret"};
+})
+
+local function create_client(client, formerr, data)
+	if formerr then
+		local errmsg = {"Error in form:"};
+		for field, err in pairs(formerr) do table.insert(errmsg, field .. ": " .. err); end
+		return {status = "error"; error = {message = table.concat(errmsg, "\n")}};
+	end
+
+	local creator = jid.split(data.from);
+	local client_id = id.short();
+
+	client.client_id = jid.join(creator, module.host, client_id);
+	client.client_secret = id.long();
+
+	local ok, err = errors.coerce(clients:set(creator, client_id, client));
+	module:log("info", "OAuth2 client %q created by %s", client_id, data.from);
+	if not ok then return {status = "error"; error = {message = err}}; end
+
+	return {status = "completed"; result = {layout = client_created; values = client}};
+end
+
+local handler = adhoc.new_simple_form(new_client, create_client);
+
+module:provides("adhoc", module:require "adhoc".new(new_client.title, new_client[1].value, handler, "local_user"));