42 lines
766 B
Go
42 lines
766 B
Go
package main
|
|
|
|
import (
|
|
"encoding/json"
|
|
"fmt"
|
|
"log"
|
|
"os"
|
|
"strconv"
|
|
|
|
"git.0cd.xyz/michael/toolbox/req"
|
|
)
|
|
|
|
const url = "https://cdn.jsdelivr.net/gh/fawazahmed0/currency-api@1/latest/currencies/"
|
|
|
|
func main() {
|
|
from, to, value := ui()
|
|
body, _, err := req.Get(url+from+"/"+to+".json", nil)
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
var result map[string]interface{}
|
|
if err := json.Unmarshal(body, &result); err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
v, ok := result[to].(float64)
|
|
if !ok {
|
|
log.Fatal("invalid conversion")
|
|
}
|
|
fmt.Printf("%.2f %s\n", v*value, to)
|
|
}
|
|
|
|
func ui() (from, to string, value float64) {
|
|
if len(os.Args) < 4 {
|
|
os.Exit(1)
|
|
}
|
|
val, err := strconv.ParseFloat(os.Args[3], 64)
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
return os.Args[1], os.Args[2], val
|
|
}
|