--- a/plugins/mod_cron.lua	Thu Nov 30 11:42:52 2023 +0000
+++ b/plugins/mod_cron.lua	Thu Nov 30 12:41:26 2023 +0000
@@ -6,100 +6,98 @@
 
 function module.add_host(host_module)
 
-	local last_run_times = host_module:open_store("cron", "map");
-	active_hosts[host_module.host] = true;
+    local last_run_times = host_module:open_store("cron", "map");
+    active_hosts[host_module.host] = true;
 
-	local function save_task(task, started_at)
-		last_run_times:set(nil, task.id, started_at);
-	end
+    local function save_task(task, started_at)
+        last_run_times:set(nil, task.id, started_at);
+    end
 
-	local function restore_task(task)
-		if task.last == nil then
-			task.last = last_run_times:get(nil, task.id);
-		end
-	end
+    local function restore_task(task)
+        if task.last == nil then
+            task.last = last_run_times:get(nil, task.id);
+        end
+    end
 
-	local function task_added(event)
-		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
-		task.period = host_module:get_option_period(task.id:gsub("/", "_") .. "_period", "1" .. task.when, 60, 86400 * 7 * 53);
-		task.restore = restore_task;
-		task.save = save_task;
-		module:log("debug", "%s task %s added", task.when, task.id);
-		return true
-	end
+    local function task_added(event)
+        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
+        task.period = host_module:get_option_period(
+                          task.id:gsub("/", "_") .. "_period", "1" .. task.when,
+                          60, 86400 * 7 * 53);
+        task.restore = restore_task;
+        task.save = save_task;
+        module:log("debug", "%s task %s added", task.when, task.id);
+        return true
+    end
 
-	local function task_removed(event)
-		local task = event.item;
-		host_module:log("debug", "Task %s removed", task.id);
-		return true
-	end
+    local function task_removed(event)
+        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);
+    host_module:handle_items("task", task_added, task_removed, true);
 
-	function host_module.unload()
-		active_hosts[host_module.host] = nil;
-	end
+    function host_module.unload() active_hosts[host_module.host] = nil; end
 end
 
 local function should_run(task, last)
-	return not last or last + task.period * 0.995 <= os.time()
+    return not last or last + task.period * 0.995 <= os.time()
 end
 
 local function run_task(task)
-	task:restore();
-	if not should_run(task, task.last) then
-		return
-	end
-	local started_at = os.time();
-	task:run(started_at);
-	task.last = started_at;
-	task:save(started_at);
+    task:restore();
+    if not should_run(task, task.last) then return end
+    local started_at = os.time();
+    task:run(started_at);
+    task.last = started_at;
+    task:save(started_at);
 end
 
 local task_runner = async.runner(run_task);
 scheduled = module:add_timer(1, function()
-	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")) do
-			task_runner:run(task);
-		end
-	end
-	module:log("debug", "Wait %ds", delay);
-	return delay
+    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")) do
+            task_runner:run(task);
+        end
+    end
+    module:log("debug", "Wait %ds", delay);
+    return delay
 end);
 
 module:add_item("shell-command", {
-	section = "cron";
-	section_desc = "View and manage recurring tasks";
-	name = "tasks";
-	desc = "View registered tasks";
-	args = {};
-	handler = function (self, filter_host)
-		local format_table = require "prosody.util.human.io".table;
-		local it = require "util.iterators";
-		local row = format_table({
-			{ title = "Host", width = "2p" };
-			{ title = "Task", width = "3p" };
-			{ title = "Desc", width = "3p" };
-			{ title = "When", width = "1p" };
-			{ title = "Last run", width = "20" };
-		}, self.session.width);
-		local print = self.session.print;
-		print(row());
-		for host in it.sorted_pairs(filter_host and { [filter_host]=true } or active_hosts) do
-			for _, task in ipairs(module:context(host):get_host_items("task")) do
-				print(row { host, task.id, task.name, task.when, task.last and os.date("%Y-%m-%d %R:%S", task.last) or "never" });
-				--self.session.print(require "util.serialization".serialize(task, "debug"));
-				--print("");
-			end
-		end
-	end;
+    section = "cron",
+    section_desc = "View and manage recurring tasks",
+    name = "tasks",
+    desc = "View registered tasks",
+    args = {},
+    handler = function(self, filter_host)
+        local format_table = require("prosody.util.human.io").table;
+        local it = require("util.iterators");
+        local row = format_table({
+            {title = "Host", width = "2p"}, {title = "Task", width = "3p"},
+            {title = "Desc", width = "3p"}, {title = "When", width = "1p"},
+            {title = "Last run", width = "20"}
+        }, self.session.width);
+        local print = self.session.print;
+        print(row());
+        for host in it.sorted_pairs(filter_host and {[filter_host] = true} or
+                                        active_hosts) do
+            for _, task in ipairs(module:context(host):get_host_items("task")) do
+                print(row({
+                    host, task.id, task.name, task.when,
+                    task.last and os.date("%Y-%m-%d %R:%S", task.last) or
+                        "never"
+                }));
+            end
+        end
+    end
 });

--- a/teal-src/prosody/plugins/mod_cron.tl	Thu Nov 30 11:42:52 2023 +0000
+++ b/teal-src/prosody/plugins/mod_cron.tl	Thu Nov 30 12:41:26 2023 +0000
@@ -105,3 +105,29 @@
 end);
 
 -- TODO measure load, pick a good time to do stuff
+
+module:add_item("shell-command", {
+	section = "cron";
+	section_desc = "View and manage recurring tasks";
+	name = "tasks";
+	desc = "View registered tasks";
+	args = {};
+	handler = function (self, filter_host : string)
+		local format_table = require "prosody.util.human.io".table;
+		local it = require "util.iterators";
+		local row = format_table({
+			{ title = "Host", width = "2p" };
+			{ title = "Task", width = "3p" };
+			{ title = "Desc", width = "3p" };
+			{ title = "When", width = "1p" };
+			{ title = "Last run", width = "20" };
+		}, self.session.width);
+		local print = self.session.print;
+		print(row());
+		for host in it.sorted_pairs(filter_host and { [filter_host]=true } or active_hosts) do
+			for _, task in ipairs(module:context(host):get_host_items("task")) do
+				print(row { host, task.id, task.name, task.when, task.last and os.date("%Y-%m-%d %R:%S", task.last) or "never" });
+			end
+		end
+	end;
+});