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|
package main
import (
"encoding/csv"
"encoding/json"
"fmt"
"io"
"log"
"net/http"
"os"
"strconv"
"strings"
)
type coordsResponse []struct {
Name string `json:"name"`
Lat float64 `json:"lat"`
Lon float64 `json:"lon"`
Country string `json:"country"`
State string `json:"state"`
}
type Coords struct {
Name string `json:"name"`
Lat float64 `json:"lat"`
Lon float64 `json:"lon"`
Country string `json:"country"`
State string `json:"state"`
}
type Rain struct {
Hour float64 `json:"1h"`
}
type Snow struct {
Hour float64 `json:"1h"`
}
type WeatherResponse struct {
Lat float64 `json:"lat"`
Lon float64 `json:"lon"`
Timezone string `json:"timezone"`
TimezoneOffset int `json:"timezone_offset"`
Current struct {
Dt int64 `json:"dt"`
Sunrise int `json:"sunrise"`
Sunset int `json:"sunset"`
Temp float64 `json:"temp"`
FeelsLike float64 `json:"feels_like"`
Pressure int `json:"pressure"`
Humidity int `json:"humidity"`
DewPoint float64 `json:"dew_point"`
Uvi float64 `json:"uvi"`
Clouds int `json:"clouds"`
Visibility int `json:"visibility"`
WindSpeed float64 `json:"wind_speed"`
WindDeg int `json:"wind_deg"`
Rain *Rain `json:"rain,omitempty"`
Snow *Snow `json:"snow,omitempty"`
Weather []struct {
ID int `json:"id"`
Main string `json:"main"`
Description string `json:"description"`
Icon string `json:"icon"`
} `json:"weather"`
} `json:"current"`
Minutely []struct {
Dt int64 `json:"dt"`
Precipitation float64 `json:"precipitation"`
} `json:"minutely"`
Hourly []struct {
Dt int64 `json:"dt"`
Temp float64 `json:"temp"`
FeelsLike float64 `json:"feels_like"`
Pressure int `json:"pressure"`
Humidity int `json:"humidity"`
DewPoint float64 `json:"dew_point"`
Uvi float64 `json:"uvi"`
Clouds int `json:"clouds"`
Visibility int `json:"visibility,omitempty"`
WindSpeed float64 `json:"wind_speed"`
WindDeg int `json:"wind_deg"`
WindGust float64 `json:"wind_gust"`
Weather []struct {
ID int `json:"id"`
Main string `json:"main"`
Description string `json:"description"`
Icon string `json:"icon"`
} `json:"weather"`
Pop float64 `json:"pop"`
Rain *Rain `json:"rain,omitempty"`
Snow *Snow `json:"snow,omitempty"`
} `json:"hourly"`
Daily []struct {
Dt int64 `json:"dt"`
Sunrise int `json:"sunrise"`
Sunset int `json:"sunset"`
Moonrise int `json:"moonrise"`
Moonset int `json:"moonset"`
MoonPhase float64 `json:"moon_phase"`
Summary string `json:"summary"`
Temp struct {
Day float64 `json:"day"`
Min float64 `json:"min"`
Max float64 `json:"max"`
Night float64 `json:"night"`
Eve float64 `json:"eve"`
Morn float64 `json:"morn"`
} `json:"temp"`
FeelsLike struct {
Day float64 `json:"day"`
Night float64 `json:"night"`
Eve float64 `json:"eve"`
Morn float64 `json:"morn"`
} `json:"feels_like"`
Pressure int `json:"pressure"`
Humidity int `json:"humidity"`
DewPoint float64 `json:"dew_point"`
WindSpeed float64 `json:"wind_speed"`
WindDeg int `json:"wind_deg"`
WindGust float64 `json:"wind_gust"`
Weather []struct {
ID int `json:"id"`
Main string `json:"main"`
Description string `json:"description"`
Icon string `json:"icon"`
} `json:"weather"`
Clouds int `json:"clouds"`
Pop float64 `json:"pop"`
Rain float64 `json:"rain,omitempty"`
Uvi float64 `json:"uvi"`
} `json:"daily"`
}
func GetWeather() (WeatherResponse, Coords) {
home, err := os.UserHomeDir()
if err != nil {
log.Fatalf("Failed to read homedir with %v", err)
}
key := readFile(fmt.Sprint(home, "/.config/porch/key.txt"))
var city string
if len(os.Args) < 2 {
city = readFile(fmt.Sprint(home, "/.config/porch/defaultCity.txt"))
} else {
var b strings.Builder
b.WriteString(os.Args[1])
if len(os.Args) > 2 {
for _, v := range os.Args[2:] {
b.WriteString(fmt.Sprintf(" %s", v))
}
}
city = b.String()
}
cityMemo := fmt.Sprint(home, "/.config/porch/cities.csv")
var coords Coords
coords, found := memoRead(city, cityMemo)
if !found {
cityQuery := fmtCityQuery(strings.ReplaceAll(city, " ", "_"), key)
resp := getUrlResponse(cityQuery)
var coordsResp coordsResponse
err := json.Unmarshal(resp, &coordsResp)
if err != nil {
panic(err)
}
if len(coordsResp) < 1 {
log.Fatalf("No results found for city \"%s\"\n", city)
}
coords = coordsResp[0]
rec := coords.toStringRec()
memoWrite(rec, cityMemo)
}
weatherQuery := fmtWeatherQuery(coords.Lat, coords.Lon, key)
resp := getUrlResponse(weatherQuery)
var weatherResp WeatherResponse
err = json.Unmarshal(resp, &weatherResp)
if err != nil {
panic(err)
}
return weatherResp, coords
}
func readFile(keyfile string) string {
k, err := os.ReadFile(keyfile)
if err != nil {
panic(err)
}
return strings.TrimSpace(string(k))
}
func fmtCityQuery(city string, key string) string {
return fmt.Sprintf("https://api.openweathermap.org/geo/1.0/direct?q=%s&limit=1&appid=%s", city, key)
}
func fmtWeatherQuery(lat float64, lon float64, key string) string {
return fmt.Sprintf("https://api.openweathermap.org/data/3.0/onecall?lat=%f&lon=%f&appid=%s&units=imperial", lat, lon, key)
}
func getUrlResponse(u string) []byte {
resp, err := http.Get(u)
if err != nil {
panic(err)
}
defer resp.Body.Close()
body, err := io.ReadAll(resp.Body)
if err != nil {
panic(err)
}
return body
}
func (c Coords) toStringRec() []string {
return []string{
c.Name,
strconv.FormatFloat(c.Lat, 'f', -1, 64),
strconv.FormatFloat(c.Lon, 'f', -1, 64),
c.Country,
c.State,
}
}
func coordsFromStringRec(rec []string) Coords {
lat, err := strconv.ParseFloat(rec[1], 64)
if err != nil {
panic(err)
}
lon, err := strconv.ParseFloat(rec[2], 64)
if err != nil {
panic(err)
}
return Coords{
rec[0],
lat,
lon,
rec[3],
rec[4],
}
}
func memoRead(city string, memoP string) (Coords, bool) {
f, err := os.OpenFile(memoP, os.O_RDONLY|os.O_CREATE, 0666)
if err != nil {
panic(err)
}
defer f.Close()
reader := csv.NewReader(f)
existing, err := reader.ReadAll()
if err != nil {
panic(err)
}
// Does this record already exist?
for _, rec := range existing {
if rec[0] == city {
return coordsFromStringRec(rec), true
}
}
return Coords{}, false
}
// Write a record. Does not check for duplication.
func memoWrite(r []string, memoP string) {
f, err := os.OpenFile(memoP, os.O_WRONLY|os.O_CREATE|os.O_APPEND, 0666)
if err != nil {
panic(err)
}
defer f.Close()
writer := csv.NewWriter(f)
writer.Write(r)
writer.Flush()
}
|
