prosody
39991e40d1dc
util/adhoc.lua

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util/adhoc.lua @ 10973:39991e40d1dc

util.dbuffer: dynamic string buffer Similar to util.ringbuffer (and shares almost identical API). Differences: - size limit is optional and dynamic - does not allocate a fixed buffer of max_size bytes - focus on simply storing references to existing string objects where possible, avoiding unnecessary allocations - references are still stored in a ring buffer to enable use as a fast FIFO Optional second parameter to new() provides the number of ring buffer segments. On Lua 5.2 on my laptop, a segment is ~19 bytes. If the ring buffer fills up, the next write will compact all strings into a single item.
author Matthew Wild <mwild1@gmail.com>
date Fri, 26 Jun 2020 16:41:31 +0100
parent 10667:49312378ba1d
child 11352:e10567199f02
line wrap: on
line source

-- luacheck: ignore 212/self

local function new_simple_form(form, result_handler)
	return function(self, data, state)
		if state or data.form then
			if data.action == "cancel" then
				return { status = "canceled" };
			end
			local fields, err = form:data(data.form);
			return result_handler(fields, err, data);
		else
			return { status = "executing", actions = {"next", "complete", default = "complete"}, form = form }, "executing";
		end
	end
end

local function new_initial_data_form(form, initial_data, result_handler)
	return function(self, data, state)
		if state or data.form then
			if data.action == "cancel" then
				return { status = "canceled" };
			end
			local fields, err = form:data(data.form);
			return result_handler(fields, err, data);
		else
			return { status = "executing", actions = {"next", "complete", default = "complete"},
				 form = { layout = form, values = initial_data(data) } }, "executing";
		end
	end
end

return { new_simple_form = new_simple_form,
	 new_initial_data_form = new_initial_data_form };