ircd:Ⓜ️:event: Augment event::horizon interface allowing full column iteration.

include/ircd/m/event/horizon.h

@@ -27,13 +27,14 @@ class ircd::m::event::horizon
 	event::id event_id;
 
   public:
-	using closure_bool = event::closure_idx_bool;
+	using closure_bool = std::function<bool (const event::id &, const event::idx &)>;
 
 	bool for_each(const closure_bool &) const;
 	bool has(const event::idx &) const;
 	size_t count() const;
 
 	horizon(const event::id &);
+	horizon() = default;
 
 	static bool has(const event::id &);
 	static size_t rebuild();

ircd/m_event.cc

@@ -2588,7 +2588,8 @@ ircd::m::event::horizon::count()
 const
 {
 	size_t ret(0);
-	for_each([&ret](const auto &)
+	for_each([&ret]
+	(const auto &, const auto &)
 	{
 		++ret;
 		return true;
@@ -2602,7 +2603,7 @@ ircd::m::event::horizon::has(const event::idx &event_idx)
 const
 {
 	return !for_each([&event_idx]
-	(const auto &_event_idx)
+	(const auto &, const auto &_event_idx)
 	{
 		// false to break; true to continue.
 		return _event_idx == event_idx? false : true;
@@ -2613,25 +2614,47 @@ bool
 ircd::m::event::horizon::for_each(const closure_bool &closure)
 const
 {
+	if(!this->event_id)
+	{
+		db::column &column{dbs::event_horizon};
+		for(auto it(column.begin()); it; ++it)
+		{
+			const auto &parts
+			{
+				split(it->first, "\0"_sv)
+			};
+
+			const auto &event_id
+			{
+				parts.first
+			};
+
+			const auto &event_idx
+			{
+				byte_view<event::idx>(parts.second)
+			};
+
+			if(!closure(event_id, event_idx))
+				return false;
+		}
+
+		return true;
+	}
+
 	char buf[m::dbs::EVENT_HORIZON_KEY_MAX_SIZE];
 	const string_view &key
 	{
 		m::dbs::event_horizon_key(buf, event_id, 0UL)
 	};
 
-	auto it
+	for(auto it(m::dbs::event_horizon.begin(key)); it; ++it)
-	{
-		m::dbs::event_horizon.begin(key)
-	};
-
-	for(; it; ++it)
 	{
 		const auto &event_idx
 		{
 			std::get<0>(m::dbs::event_horizon_key(it->first))
 		};
 
-		if(!closure(event_idx))
+		if(!closure(event_id, event_idx))
 			return false;
 	}
 

modules/console.cc

@@ -6460,7 +6460,7 @@ console_cmd__event__horizon(opt &out, const string_view &line)
 	};
 
 	horizon.for_each([&out, &event_id]
-	(const auto &event_idx)
+	(const auto &, const auto &event_idx)
 	{
 		const auto _event_id
 		{