125 lines
2.6 KiB
Go
125 lines
2.6 KiB
Go
package infinitime
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import (
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"bytes"
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"encoding/binary"
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"errors"
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"time"
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)
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const (
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weatherVersion = 0
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currentWeatherType = 0
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forecastWeatherType = 1
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)
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type WeatherIcon uint8
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const (
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WeatherIconClear WeatherIcon = iota
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WeatherIconFewClouds
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WeatherIconClouds
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WeatherIconHeavyClouds
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WeatherIconCloudsWithRain
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WeatherIconRain
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WeatherIconThunderstorm
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WeatherIconSnow
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WeatherIconMist
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)
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// CurrentWeather represents the current weather
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type CurrentWeather struct {
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Time time.Time
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CurrentTemp float32
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MinTemp float32
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MaxTemp float32
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Location string
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Icon WeatherIcon
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}
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// Bytes returns the [CurrentWeather] struct encoded using the InfiniTime
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// weather wire protocol.
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func (cw CurrentWeather) Bytes() []byte {
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buf := &bytes.Buffer{}
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buf.WriteByte(currentWeatherType)
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buf.WriteByte(weatherVersion)
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_, offset := cw.Time.Zone()
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binary.Write(buf, binary.LittleEndian, cw.Time.Unix()+int64(offset))
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binary.Write(buf, binary.LittleEndian, int16(cw.CurrentTemp*100))
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binary.Write(buf, binary.LittleEndian, int16(cw.MinTemp*100))
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binary.Write(buf, binary.LittleEndian, int16(cw.MaxTemp*100))
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location := make([]byte, 32)
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copy(location, cw.Location)
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buf.Write(location)
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buf.WriteByte(byte(cw.Icon))
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return buf.Bytes()
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}
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// Forecast represents a weather forecast
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type Forecast struct {
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Time time.Time
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Days []ForecastDay
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}
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// ForecastDay represents a forecast for a single day
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type ForecastDay struct {
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MinTemp int16
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MaxTemp int16
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Icon WeatherIcon
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}
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// Bytes returns the [Forecast] struct encoded using the InfiniTime
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// weather wire protocol.
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func (f Forecast) Bytes() []byte {
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buf := &bytes.Buffer{}
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buf.WriteByte(forecastWeatherType)
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buf.WriteByte(weatherVersion)
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_, offset := f.Time.Zone()
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binary.Write(buf, binary.LittleEndian, f.Time.Unix()+int64(offset))
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buf.WriteByte(uint8(len(f.Days)))
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for _, day := range f.Days {
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binary.Write(buf, binary.LittleEndian, day.MinTemp*100)
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binary.Write(buf, binary.LittleEndian, day.MaxTemp*100)
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buf.WriteByte(byte(day.Icon))
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}
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return buf.Bytes()
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}
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// SetCurrentWeather updates the current weather data on the PineTime
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func (d *Device) SetCurrentWeather(cw CurrentWeather) error {
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c, err := d.getChar(weatherDataChar)
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if err != nil {
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return err
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}
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_, err = c.WriteWithoutResponse(cw.Bytes())
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return err
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}
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// SetForecast sets future forecast data on the PineTime
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func (d *Device) SetForecast(f Forecast) error {
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c, err := d.getChar(weatherDataChar)
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if err != nil {
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return err
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}
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if len(f.Days) > 5 {
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return errors.New("amount of forecast days exceeds maximum of 5")
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}
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_, err = c.WriteWithoutResponse(f.Bytes())
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return err
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}
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