Unmarshal JSON from API.

asog_sounds.go

// vim:set sw=4 sts=4:
package main

import (
    "io/ioutil"
    "net/http"
    "encoding/json"
    "time"
    "os/exec"
)

type Stats struct {
    Users, Stories, Scenarios int
}

// Fills the provided Stats with data from the server.
func getStats(destination *Stats) (err error) {
    var (
        r *http.Response
        b []byte
    )
    if r, err = http.Get("http://localhost:5000/api/stats"); err == nil {
        if b, err = ioutil.ReadAll(r.Body); err == nil {
            err = json.Unmarshal(b, &destination);
        }
    }
    return err
}

func say(message string) {
    cmd := exec.Command("say", message)
    cmd.Output()
    return
}

func main() {
    var stats, buffer Stats
    getStats(&stats);
    for {
        time.Sleep(1 * time.Second)
        getStats(&buffer);
        switch {
        case stats.Users < buffer.Users:
            say("New User!")
        case stats.Stories < buffer.Stories:
            say("New story!")
        case stats.Scenarios < buffer.Scenarios:
            say("New proposal!")
        }
        stats = buffer
    }
}