Initial commit

main.go

@@ -0,0 +1,110 @@
+package main
+
+import (
+	"bytes"
+	"encoding/csv"
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"os"
+	"strconv"
+	"time"
+
+	"git.ultraware.nl/Ultraware/util"
+)
+
+type iso8601 time.Time
+
+func (d iso8601) String() string {
+	return time.Time(d).String()
+}
+
+func (d *iso8601) UnmarshalJSON(data []byte) error {
+	data = bytes.Trim(data, `"`)
+
+	t, err := time.Parse(`2006-01-02T15:04:05-0700`, string(data))
+	if err != nil {
+		return err
+	}
+
+	*d = iso8601(t)
+	return nil
+}
+
+type day struct {
+	Summary struct {
+		Date struct {
+			ISO iso8601 `json:"iso8601"`
+		} `json:"date"`
+		MaxTemperature int `json:"max_temperature"`
+		AvgTemperature int `json:"temperature"`
+		MinTemperature int `json:"min_temperature"`
+	} `json:"summary"`
+}
+
+type data struct {
+	History struct {
+		Days []day `json:"days"`
+	} `json:"history"`
+}
+
+func main() {
+	from := getNextDate()
+	if from.After(time.Now()) {
+		fmt.Println(`Nothing to get, exiting ...`)
+		os.Exit(0)
+	}
+
+	to := from.AddDate(0, 0, 21)
+	if to.After(time.Now()) {
+		to = time.Now()
+	}
+
+	url := `https://api-ak.wunderground.com/api/d8585d80376a429e/history_` + from.Format(`20060102`) + to.Format(`20060102`) + `/lang:EN/units:english/bestfct:1/v:2.0/q/EHGG.json?showObs=0&ttl=120`
+	fmt.Println(url)
+	os.Exit(0)
+
+	resp, err := http.Get(url)
+	util.PanicOnErr(err)
+	// f, err := os.Open(`data.json`)
+	// util.PanicOnErr(err)
+
+	var d data
+
+	err = json.NewDecoder(resp.Body).Decode(&d)
+	util.PanicOnErr(err)
+
+	out, err := os.OpenFile(`weather.csv`, os.O_CREATE|os.O_APPEND|os.O_WRONLY, 0600)
+	util.PanicOnErr(err)
+
+	csvout := csv.NewWriter(out)
+	for _, day := range d.History.Days {
+		csvout.Write([]string{day.Summary.Date.ISO.String(), fToCString(day.Summary.MinTemperature), fToCString(day.Summary.AvgTemperature), fToCString(day.Summary.MaxTemperature)})
+	}
+	csvout.Flush()
+}
+
+func getNextDate() time.Time {
+	f, err := os.Open(`weather.csv`)
+	if err != nil {
+		return time.Date(2019, 2, 1, 0, 0, 0, 0, time.Local)
+	}
+
+	csvf := csv.NewReader(f)
+	var last []string
+	for {
+		row, err := csvf.Read()
+		if err != nil {
+			break
+		}
+		last = row
+	}
+	t, err := time.Parse(`2006-01-02 15:04:05.999999999 -0700 MST`, last[0])
+	util.PanicOnErr(err)
+
+	return t.AddDate(0, 0, 1)
+}
+
+func fToCString(temp int) string {
+	return strconv.FormatFloat(float64(temp-32)/1.8, 'f', 1, 64)
+}