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weather.lua
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weather.lua
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--[[
mattata v2.0 - Weather Plugin
Shows current weather for a location using Open-Meteo (no API key needed).
Geocodes via Nominatim (OpenStreetMap). Supports stored locations from setloc.
]]
local plugin = {}
plugin.name = 'weather'
plugin.category = 'utility'
plugin.description = 'Get current weather for a location'
plugin.commands = { 'weather' }
plugin.help = '/weather [location] - Get current weather for a location. If no location is given, your saved location is used (set with /setloc).'
local http = require('src.core.http')
local url = require('socket.url')
local tools = require('telegram-bot-lua.tools')
-- WMO weather codes to human-readable descriptions
local WMO_CODES = {
[0] = 'Clear sky',
[1] = 'Mainly clear',
[2] = 'Partly cloudy',
[3] = 'Overcast',
[45] = 'Foggy',
[48] = 'Depositing rime fog',
[51] = 'Light drizzle',
[53] = 'Moderate drizzle',
[55] = 'Dense drizzle',
[56] = 'Light freezing drizzle',
[57] = 'Dense freezing drizzle',
[61] = 'Slight rain',
[63] = 'Moderate rain',
[65] = 'Heavy rain',
[66] = 'Light freezing rain',
[67] = 'Heavy freezing rain',
[71] = 'Slight snowfall',
[73] = 'Moderate snowfall',
[75] = 'Heavy snowfall',
[77] = 'Snow grains',
[80] = 'Slight rain showers',
[81] = 'Moderate rain showers',
[82] = 'Violent rain showers',
[85] = 'Slight snow showers',
[86] = 'Heavy snow showers',
[95] = 'Thunderstorm',
[96] = 'Thunderstorm with slight hail',
[99] = 'Thunderstorm with heavy hail'
}
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, _ = 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_weather(lat, lon)
local request_url = string.format(
'https://api.open-meteo.com/v1/forecast?latitude=%.6f&longitude=%.6f'
.. '&current=temperature_2m,relative_humidity_2m,apparent_temperature'
.. ',weather_code,wind_speed_10m,wind_direction_10m'
.. '&temperature_unit=celsius&wind_speed_unit=kmh',
lat, lon
)
local data, _ = http.get_json(request_url)
if not data or not data.current then
return nil, 'Weather API request failed.'
end
return data.current
end
local function c_to_f(c)
return c * 9 / 5 + 32
end
local function wind_direction(degrees)
local dirs = { 'N', 'NNE', 'NE', 'ENE', 'E', 'ESE', 'SE', 'SSE', 'S', 'SSW', 'SW', 'WSW', 'W', 'WNW', 'NW', 'NNW' }
local idx = math.floor((degrees / 22.5) + 0.5) % 16 + 1
return dirs[idx]
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>/weather 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 weather, err = get_weather(lat, lon)
if not weather then
return api.send_message(message.chat.id, err)
end
local temp_c = weather.temperature_2m or 0
local feels_c = weather.apparent_temperature or 0
local humidity = weather.relative_humidity_2m or 0
local wind_speed = weather.wind_speed_10m or 0
local wind_dir = wind_direction(weather.wind_direction_10m or 0)
local conditions = WMO_CODES[weather.weather_code] or 'Unknown'
local output = string.format(
'<b>Weather for %s</b>\n\n'
.. 'Conditions: %s\n'
.. 'Temperature: <b>%.1f°C</b> / <b>%.1f°F</b>\n'
.. 'Feels like: %.1f°C / %.1f°F\n'
.. 'Humidity: %d%%\n'
.. 'Wind: %.1f km/h %s',
tools.escape_html(location_name),
conditions,
temp_c, c_to_f(temp_c),
feels_c, c_to_f(feels_c),
humidity,
wind_speed, wind_dir
)
return api.send_message(message.chat.id, output, { parse_mode = 'html' })
end
return plugin

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