modules/m_room: Add preliminary purge(); add linkage to console cmd.

modules/console.cc

@@ -5292,6 +5292,23 @@ console_cmd__room__purge(opt &out, const string_view &line)
 		m::room_id(token(line, ' ', 0))
 	};
 
+	const m::room room
+	{
+		room_id
+	};
+
+	using prototype = size_t (const m::room &);
+	static m::import<prototype> purge
+	{
+		"m_room", "purge"
+	};
+
+	const size_t ret
+	{
+		purge(room)
+	};
+
+	out << "erased " << ret << std::endl;
 	return true;
 }
 

modules/m_room.cc

@@ -16,6 +16,34 @@ IRCD_MODULE
 	"Matrix state library; modular components."
 };
 
+extern "C" size_t
+purge(const m::room &room)
+{
+	size_t ret(0);
+	db::txn txn
+	{
+		*m::dbs::events
+	};
+
+	room.for_each([&txn, &ret]
+	(const m::event::idx &idx)
+	{
+		const m::event::fetch event
+		{
+			idx
+		};
+
+		m::dbs::write_opts opts;
+		opts.op = db::op::DELETE;
+		opts.event_idx = idx;
+		m::dbs::write(txn, event, opts);
+		++ret;
+	});
+
+	txn();
+	return ret;
+}
+
 extern "C" void
 make_auth(const m::room &room,
           json::stack::array &out,