From 3cbf610cd054d4a1ae2906967608d48deea62c66 Mon Sep 17 00:00:00 2001
From: Jason Volk <jason@zemos.net>
Date: Sat, 24 Oct 2020 21:24:38 -0700
Subject: [PATCH] ircd::m::user::pushers: Additional derivative utils for
 interface.

---
 include/ircd/m/user/pushers.h |  6 +++++
 matrix/user_pushers.cc        | 43 +++++++++++++++++++++++++++++++++++
 2 files changed, 49 insertions(+)

diff --git a/include/ircd/m/user/pushers.h b/include/ircd/m/user/pushers.h
index 7888f5042..0873fb70f 100644
--- a/include/ircd/m/user/pushers.h
+++ b/include/ircd/m/user/pushers.h
@@ -19,7 +19,13 @@ struct ircd::m::user::pushers
 	m::user user;
 
   public:
+
 	bool for_each(const closure_bool &) const;
+
+	size_t count(const string_view &kind = {}) const;
+	bool any(const string_view &kind = {}) const;
+	bool has(const string_view &key) const;
+
 	bool get(std::nothrow_t, const string_view &key, const closure &) const;
 	void get(const string_view &key, const closure &) const;
 	bool set(const json::object &value) const;
diff --git a/matrix/user_pushers.cc b/matrix/user_pushers.cc
index 26017fd26..267b6fb32 100644
--- a/matrix/user_pushers.cc
+++ b/matrix/user_pushers.cc
@@ -120,6 +120,49 @@ const
 	});
 }
 
+bool
+ircd::m::user::pushers::has(const string_view &key)
+const
+{
+	return !for_each([&key] // for_each() returns true if no match
+	(const event::idx &pusher_idx, const string_view &pushkey, const push::pusher &pusher)
+	{
+		return key != pushkey;
+	});
+}
+
+bool
+ircd::m::user::pushers::any(const string_view &kind)
+const
+{
+	return !for_each([&kind] // for_each() returns true if no match
+	(const event::idx &pusher_idx, const string_view &pushkey, const push::pusher &pusher)
+	{
+		if(!kind)
+			return false;
+
+		if(json::get<"kind"_>(pusher) == kind)
+			return false;
+
+		return true;
+	});
+}
+
+size_t
+ircd::m::user::pushers::count(const string_view &kind)
+const
+{
+	size_t ret{0};
+	for_each([&ret, &kind]
+	(const event::idx &pusher_idx, const string_view &pushkey, const push::pusher &pusher)
+	{
+		ret += !kind || json::get<"kind"_>(pusher) == kind;
+		return true;
+	});
+
+	return ret;
+}
+
 bool
 ircd::m::user::pushers::for_each(const closure_bool &closure)
 const