time.lua
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time.lua
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	--[[
	mattata v2.0 - Time Plugin
	Shows current time and date for a location.
	Geocodes via Nominatim, then uses timeapi.io for timezone lookup.
	Supports stored locations from setloc.
	]]

	local plugin = {}
	plugin.name = 'time'
	plugin.category = 'utility'
	plugin.description = 'Get current time for a location'
	plugin.commands = { 'time', 't', 'date', 'd' }
	plugin.help = '/time [location] - Get the current time and date for a location. Uses your saved location if none is specified.'

	local http = require('src.core.http')
	local url = require('socket.url')
	local tools = require('telegram-bot-lua.tools')

	local function geocode(query)
	local encoded = url.escape(query)
	local request_url = 'https://nominatim.openstreetmap.org/search?q=' .. encoded .. '&format=json&limit=1&addressdetails=1'
	local data, code = http.get_json(request_url)
	if not data then
	return nil, 'Geocoding request failed.'
	end
	if #data == 0 then
	return nil, 'Location not found. Please check the spelling and try again.'
	end
	return {
	lat = tonumber(data[1].lat),
	lon = tonumber(data[1].lon),
	name = data[1].display_name
	}
	end

	local function get_timezone(lat, lon)
	local request_url = string.format(
	'https://timeapi.io/api/TimeZone/coordinate?latitude=%.6f&longitude=%.6f',
	lat, lon
	)
	local data, code = http.get_json(request_url)
	if not data or not data.timeZone then
	return nil, 'Timezone lookup failed.'
	end
	return data
	end

	local function format_day_suffix(day)
	local d = tonumber(day)
	if d == 1 or d == 21 or d == 31 then return 'st'
	elseif d == 2 or d == 22 then return 'nd'
	elseif d == 3 or d == 23 then return 'rd'
	else return 'th'
	end
	end

	function plugin.on_message(api, message, ctx)
	local input = message.args
	local lat, lon, location_name

	if not input or input == '' then
	-- Try stored location
	local result = ctx.db.call('sp_get_user_location', { message.from.id })
	if result and result[1] then
	lat = tonumber(result[1].latitude)
	lon = tonumber(result[1].longitude)
	location_name = result[1].address or string.format('%.4f, %.4f', lat, lon)
	else
	return api.send_message(
	message.chat.id,
	'Please specify a location or set your default with /setloc.\nUsage: <code>/time London</code>',
	{ parse_mode = 'html' }
	)
	end
	else
	local geo, err = geocode(input)
	if not geo then
	return api.send_message(message.chat.id, err)
	end
	lat = geo.lat
	lon = geo.lon
	location_name = geo.name
	end

	local tz_data, err = get_timezone(lat, lon)
	if not tz_data then
	return api.send_message(message.chat.id, err)
	end

	local timezone = tz_data.timeZone or 'Unknown'
	local current_time = tz_data.currentLocalTime or ''
	local utc_offset = tz_data.currentUtcOffset and tz_data.currentUtcOffset.seconds or 0
	local dst_active = tz_data.hasDayLightSaving and tz_data.isDayLightSavingActive

	-- Parse the datetime string (format: "2024-01-15T14:30:00.0000000")
	local year, month, day, hour, min, sec = current_time:match('(%d+)-(%d+)-(%d+)T(%d+):(%d+):(%d+)')

	if not year then
	return api.send_message(message.chat.id, 'Failed to parse time data from the API.')
	end

	local months = { 'January', 'February', 'March', 'April', 'May', 'June',
	'July', 'August', 'September', 'October', 'November', 'December' }
	local days_of_week = { 'Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday' }

	-- Calculate day of week using Tomohiko Sakamoto's algorithm
	local y, m, d = tonumber(year), tonumber(month), tonumber(day)
	local t_table = { 0, 3, 2, 5, 0, 3, 5, 1, 4, 6, 2, 4 }
	if m < 3 then y = y - 1 end
	local dow = (y + math.floor(y / 4) - math.floor(y / 100) + math.floor(y / 400) + t_table[m] + d) % 7 + 1

	local day_suffix = format_day_suffix(day)
	local offset_hours = utc_offset / 3600
	local offset_str
	if offset_hours >= 0 then
	offset_str = string.format('+%g', offset_hours)
	else
	offset_str = string.format('%g', offset_hours)
	end

	local lines = {
	'<b>' .. tools.escape_html(location_name) .. '</b>',
	'',
	string.format('Time: <b>%s:%s:%s</b>', hour, min, sec),
	string.format('Date: <b>%s, %d%s %s %s</b>',
	days_of_week[dow],
	tonumber(day), day_suffix,
	months[tonumber(month)],
	year
	),
	string.format('Timezone: <code>%s</code> (UTC%s)', tools.escape_html(timezone), offset_str)
	}

	if dst_active then
	table.insert(lines, 'DST: Active')
	end

	return api.send_message(message.chat.id, table.concat(lines, '\n'), { parse_mode = 'html' })
	end

	return plugin

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