--- a/teal-src/plugins/mod_cron.tl	Fri Mar 17 19:38:39 2023 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,106 +0,0 @@
-module:set_global();
-
-local async = require "util.async";
-local datetime = require "util.datetime";
-
-local record map_store<K,V>
-	-- TODO move to somewhere sensible
-	get : function (map_store<K,V>, string, K) : V
-	set : function (map_store<K,V>, string, K, V)
-end
-
-local enum frequency
-	"hourly"
-	"daily"
-	"weekly"
-end
-
-local record task_spec
-	id : string -- unique id
-	name : string -- name or short description
-	when : frequency
-	last : integer
-	run : function (task_spec, integer)
-	save : function (task_spec, integer)
-end
-
-local record task_event
-	source : module
-	item : task_spec
-end
-
-local periods : { frequency : integer } = { hourly = 3600, daily = 86400, weekly = 7*86400 }
-
-local active_hosts : { string : boolean } = {  }
-
-function module.add_host(host_module : moduleapi)
-
-	local last_run_times = host_module:open_store("cron", "map") as map_store<string,integer>;
-	active_hosts[host_module.host] = true;
-
-	local function save_task(task : task_spec, started_at : integer)
-		last_run_times:set(nil, task.id, started_at);
-	end
-
-	local function task_added(event : task_event) : boolean
-		local task = event.item;
-		if task.name == nil then
-			task.name = task.when;
-		end
-		if task.id == nil then
-			task.id = event.source.name .. "/" .. task.name:gsub("%W", "_"):lower();
-		end
-		if task.last == nil then
-			task.last = last_run_times:get(nil, task.id);
-		end
-		task.save = save_task;
-		module:log("debug", "%s task %s added, last run %s", task.when, task.id,
-			task.last and datetime.datetime(task.last) or "never");
-		if task.last == nil then
-			-- initialize new tasks so e.g. daily tasks run at ~midnight UTC for now
-			local now = os.time();
-			task.last = now - now % periods[task.when];
-		end
-		return true;
-	end
-
-	local function task_removed(event : task_event) : boolean
-		local task = event.item;
-		host_module:log("debug", "Task %s removed", task.id);
-		return true;
-	end
-
-	host_module:handle_items("task", task_added, task_removed, true);
-
-	function host_module.unload()
-		active_hosts[host_module.host]=nil;
-	end
-end
-
-local function should_run(when : frequency, last : integer) : boolean
-	return not last or last + periods[when]*0.995 <= os.time();
-end
-
-local function run_task(task : task_spec)
-	local started_at = os.time();
-	task:run(started_at);
-	task.last = started_at;
-	task:save(started_at);
-end
-
-local task_runner : async.runner_t<task_spec> = async.runner(run_task);
-scheduled = module:add_timer(1, function() : integer
-	module:log("info", "Running periodic tasks");
-	local delay = 3600;
-	for host in pairs(active_hosts) do
-		module:log("debug", "Running periodic tasks for host %s", host);
-		for _, task in ipairs(module:context(host):get_host_items("task") as { task_spec } ) do
-			module:log("debug", "Considering %s task %s (%s)", task.when, task.id, task.run);
-			if should_run(task.when, task.last) then task_runner:run(task); end
-		end
-	end
-	module:log("debug", "Wait %ds", delay);
-	return delay;
-end);
-
--- TODO measure load, pick a good time to do stuff