Add wip weather

1 files changed, 91 insertions, 0 deletions

diff --git a/weather.go b/weather.go
new file mode 100644
index 0000000..161fd7b
--- /dev/null
+++ b/weather.go
@@ -0,0 +1,91 @@
+package main
+
+// TODO: allow free-text lookups of place names, rather than ids
+// TODO: decode weather type number
+
+import (
+	"encoding/json"
+	"flag"
+	"fmt"
+	"io/ioutil"
+	"log"
+	"net/http"
+	"sort"
+)
+
+const defid = "310118"
+
+var wkey = map[string]string{
+	"f": "Feels Like Temperature",
+	"h": "Humidity",
+	"p": "Pressure",
+	"t": "Temperature",
+	"v": "Visibility",
+	"wg": "Wind Gust",
+	"ws": "Wind Speed",
+	"pp": "Precipitaton Probability",
+	"uv": "Max UV Index",
+	"wd": "Wind Direction",
+	"wt": "Weather Type",
+	"AQIndex": "Air Quality",
+}
+
+func main() {
+	var j map[string]interface{}
+	var id string
+
+	flag.Parse()
+	if flag.NArg() > 0 {
+		id = flag.Arg(0)
+	} else {
+		id = defid
+	}
+
+	tr := &http.Transport{}
+	client := &http.Client{Transport: tr}
+	resp, err := client.Get("https://www.metoffice.gov.uk/public/data/PWSCache/BestForecast/Forecast/" + id + ".json?concise=true")
+	//resp, err := http.Get("https://www.metoffice.gov.uk/public/data/PWSCache/BestForecast/Forecast/" + id + ".json?concise=true")
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer resp.Body.Close()
+	b, err := ioutil.ReadAll(resp.Body)
+	err = json.Unmarshal(b, &j)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	// TODO: make this cleaner, perhaps by pre-speccing the structs
+	days := j["BestFcst"].(map[string]interface{})["Forecast"].(map[string]interface{})["Location"].(map[string]interface{})["Day"].([]interface{})
+	for _, d := range days {
+		fmt.Printf("-----------------------------\n")
+		fmt.Printf("Date: %v\n", d.(map[string]interface{})["@date"])
+		fmt.Printf("\nDay weather:\n")
+		prettyWeather(d.(map[string]interface{})["DayValues"].(map[string]interface{})["WeatherParameters"].(map[string]interface{}))
+		fmt.Printf("\nNight weather:\n")
+		prettyWeather(d.(map[string]interface{})["NightValues"].(map[string]interface{})["WeatherParameters"].(map[string]interface{}))
+
+		fmt.Printf("\nTime steps:\n")
+		timesteps := d.(map[string]interface{})["TimeSteps"].(map[string]interface{})["TimeStep"].([]interface{})
+		for _, t := range timesteps {
+			fmt.Printf("\nTime: %s\n", t.(map[string]interface{})["@time"])
+			prettyWeather(t.(map[string]interface{})["WeatherParameters"].(map[string]interface{}))
+		}
+	}
+}
+
+func prettyWeather(w map[string]interface{}) {
+	// TODO: choose what to show, and in what order, to have a compact output
+	var keys []string
+	for k, _ := range wkey {
+		keys = append(keys, k)
+	}
+	sort.Strings(keys)
+
+	for _, k := range keys {
+		t, ok := w[k]
+		if ok {
+			fmt.Printf("%s: %v\n", wkey[k], t)
+		}
+	}
+}