From 2f6384b068fb8bc0c7cf623159027b8db6a83da8 Mon Sep 17 00:00:00 2001
From: Jason Volk <jason@zemos.net>
Date: Tue, 12 Feb 2019 11:03:59 -0800
Subject: [PATCH] ircd::m::room: Add room::auth interface w/ console cmd.

---
 include/ircd/m/room.h      |  1 +
 include/ircd/m/room/auth.h | 30 ++++++++++++++++++
 include/ircd/m/room/room.h |  1 +
 ircd/m_room.cc             | 36 ++++++++++++++++++++++
 modules/console.cc         | 63 ++++++++++++++++++++++++++++++++++++++
 modules/m_room.cc          | 13 ++++++++
 6 files changed, 144 insertions(+)
 create mode 100644 include/ircd/m/room/auth.h

diff --git a/include/ircd/m/room.h b/include/ircd/m/room.h
index 54978de5d..0858353d1 100644
--- a/include/ircd/m/room.h
+++ b/include/ircd/m/room.h
@@ -81,4 +81,5 @@ namespace ircd::m
 #include "room/members.h"
 #include "room/origins.h"
 #include "room/head.h"
+#include "room/auth.h"
 #include "room/power.h"
diff --git a/include/ircd/m/room/auth.h b/include/ircd/m/room/auth.h
new file mode 100644
index 000000000..edf0cdf94
--- /dev/null
+++ b/include/ircd/m/room/auth.h
@@ -0,0 +1,30 @@
+// Matrix Construct
+//
+// Copyright (C) Matrix Construct Developers, Authors & Contributors
+// Copyright (C) 2016-2018 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.
+
+#pragma once
+#define HAVE_IRCD_M_ROOM_AUTH_H
+
+/// Interface to the auth_chain / auth_dag.
+///
+struct ircd::m::room::auth
+{
+	using closure_bool = std::function<bool (const event::idx &, const event &)>;
+	using closure = std::function<void (const event::idx &, const event &)>;
+
+	m::room room;
+
+	static bool for_each(const auth &, const closure_bool &);
+	bool for_each(const closure_bool &) const;
+	void for_each(const closure &) const;
+
+	auth(const m::room &room)
+	:room{room}
+	{}
+};
diff --git a/include/ircd/m/room/room.h b/include/ircd/m/room/room.h
index 5ddc2e84f..682a280b3 100644
--- a/include/ircd/m/room/room.h
+++ b/include/ircd/m/room/room.h
@@ -35,6 +35,7 @@ struct ircd::m::room
 	struct members;
 	struct origins;
 	struct head;
+	struct auth;
 	struct power;
 
 	using id = m::id::room;
diff --git a/ircd/m_room.cc b/ircd/m_room.cc
index 00599dce1..6da71fde2 100644
--- a/ircd/m_room.cc
+++ b/ircd/m_room.cc
@@ -2050,6 +2050,42 @@ const
 	return true;
 }
 
+//
+// room::auth
+//
+
+void
+ircd::m::room::auth::for_each(const closure &c)
+const
+{
+	for_each(closure_bool{[this, &c]
+	(const auto &a, const auto &b)
+	{
+		c(a, b);
+		return true;
+	}});
+}
+
+bool
+ircd::m::room::auth::for_each(const closure_bool &c)
+const
+{
+	return for_each(*this, c);
+}
+
+bool
+ircd::m::room::auth::for_each(const auth &a, const closure_bool &c)
+{
+	using prototype = bool (const auth &, const closure_bool &);
+
+	static mods::import<prototype> call
+	{
+		"m_room", "ircd::m::room::auth::for_each"
+	};
+
+	return call(a, c);
+}
+
 //
 // room::power
 //
diff --git a/modules/console.cc b/modules/console.cc
index 2e0fbeb90..9e6eaf624 100644
--- a/modules/console.cc
+++ b/modules/console.cc
@@ -8157,6 +8157,69 @@ console_cmd__room__dagree(opt &out, const string_view &line)
 	return true;
 }
 
+bool
+console_cmd__room__auth(opt &out, const string_view &line)
+{
+	const params param{line, " ",
+	{
+		"event_id|room_id", "event_id"
+	}};
+
+	const string_view &p0
+	{
+		param.at("event_id|room_id")
+	};
+
+	const m::room::id::buf room_id{[&p0]
+	() -> m::room::id::buf
+	{
+		switch(m::sigil(p0))
+		{
+			case m::id::ROOM:
+				return p0;
+
+			case m::id::ROOM_ALIAS:
+				return m::room_id(p0);
+
+			case m::id::EVENT:
+				return m::get(m::event::id(p0), "room_id");
+
+			default: throw params::invalid
+			{
+				"%s is the wrong kind of MXID for this argument",
+				reflect(m::sigil(p0))
+			};
+		}
+	}()};
+
+	const m::event::id &event_id
+	{
+		m::sigil(p0) != m::id::EVENT?
+			param.at("event_id"):
+			p0
+	};
+
+	const m::room room
+	{
+		room_id, event_id
+	};
+
+	const m::room::auth auth
+	{
+		room
+	};
+
+	auth.for_each([&out]
+	(const m::event::idx &idx, const m::event &event)
+	{
+		out << idx
+		    << " " << pretty_oneline(event)
+		    << std::endl;
+	});
+
+	return true;
+}
+
 //
 // user
 //
diff --git a/modules/m_room.cc b/modules/m_room.cc
index 41b331ed7..83d535b22 100644
--- a/modules/m_room.cc
+++ b/modules/m_room.cc
@@ -845,3 +845,16 @@ room_herd(const m::room &room,
 		ctx::sleep(seconds(2));
 	}
 }
+
+bool
+IRCD_MODULE_EXPORT
+ircd::m::room::auth::for_each(const auth &a,
+                              const closure_bool &closure)
+{
+	const m::room &room{a.room};
+	const auto &event_id{room.event_id};
+	if(!event_id)
+		return false;
+
+	return true;
+}