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main.go
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main.go
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package main
import (
"fmt"
"math/rand"
"os"
"time"
"github.com/kaosfere/aptdata"
"github.com/spf13/viper"
)
func randomAirport(db *aptdata.AptDB) (code string, err error) {
var runways []*aptdata.Runway
minRunways := 2
codes, err := db.GetCodes()
if err != nil {
return "", err
}
rand.Seed(time.Now().Unix())
for {
code = codes[rand.Intn(len(codes))]
runways, err = db.GetRunways(code)
if err != nil {
return code, err
}
runways = filterForCoords(runways)
if len(runways) >= minRunways {
break
}
}
return code, nil
}
func filterForCoords(raw []*aptdata.Runway) []*aptdata.Runway {
filtered := []*aptdata.Runway{}
for _, r := range raw {
if (r.End1Latitude == 0 && r.End1Longitude == 0) ||
(r.End2Latitude == 0 && r.End2Longitude == 0) {
continue
}
filtered = append(filtered, r)
}
return filtered
}
func doConfig() error {
viper.AddConfigPath(".")
viper.AddConfigPath("$HOME")
viper.SetConfigName("aptblueprint")
viper.SetDefault("datadir", "data")
viper.SetDefault("outdir", ".")
viper.SetDefault("font", "flux.ttf")
return viper.ReadInConfig()
}
func doDownload() error {
err := aptdata.DownloadData(viper.GetString("datadir"))
return err
}
func doLoad() error {
dataDir := viper.GetString("datadir")
db, err := aptdata.OpenDB(fmt.Sprintf("%s/%s", dataDir, "aptdata.db"))
if err != nil {
return err
}
defer db.Close()
return db.Reload(dataDir)
}
func doGenerate(ident string) (*aptdata.Airport, error) {
dataDir := viper.GetString("datadir")
db, err := aptdata.OpenDB(fmt.Sprintf("%s/%s", dataDir, "aptdata.db"))
if err != nil {
return nil, err
}
defer db.Close()
if !db.Populated() {
return nil, fmt.Errorf("database not populated")
}
if ident == "" {
ident, err = randomAirport(db)
if err != nil {
return nil, fmt.Errorf("Error picking airport: %s", err)
}
}
apt, err := db.GetAirport(ident)
if err != nil {
return apt, err
}
runways, err := db.GetRunways(ident)
if err != nil {
return apt, err
}
name := apt.Name
city := apt.City
region, err := db.GetRegion(apt.Region)
if err != nil {
return apt, err
}
country, err := db.GetCountry(apt.Country)
if err != nil {
return apt, err
}
err = drawAirport(runways, ident, name, city, region.Name, country.Name)
return apt, err
}
func main() {
err := doConfig()
var apt *aptdata.Airport
if err != nil {
fmt.Println(err)
fmt.Println("Error loading config. Proceeding with defaults.")
}
dataDir := viper.GetString("datadir")
_, err = os.Stat(dataDir)
if os.IsNotExist(err) {
fmt.Println("Precreating data directory.")
err = os.Mkdir(dataDir, 0755)
if err != nil {
fmt.Println("Error making data directory:", err)
os.Exit(1)
}
}
if len(os.Args) == 1 {
fmt.Println("Generating random airport.")
_, err = doGenerate("")
if err != nil {
fmt.Printf("Error generating airport: %s\n", err)
os.Exit(1)
}
os.Exit(0)
}
// TODO: The interface here between genrate/post and the database feels
// a bit awkward, and could stand to be refactored. If nothing else,
// it lacks a little bit of DRY.
switch os.Args[1] {
case "download":
fmt.Println("Downloading data.")
err = doDownload()
case "load", "reload":
fmt.Println("Loading database.")
err = doLoad()
case "generate":
if len(os.Args) > 2 {
ident := os.Args[2]
fmt.Printf("Generating %s.\n", ident)
_, err = doGenerate(ident)
} else {
fmt.Println("Generating random airport.")
_, err = doGenerate("")
}
case "post":
if len(os.Args) > 2 {
ident := os.Args[2]
fmt.Printf("Generating %s.\n", ident)
apt, err = doGenerate(ident)
} else {
fmt.Println("Generating random airport.")
apt, err = doGenerate("")
}
if err != nil {
break
}
creds := credentials{viper.GetString("consumer_key"),
viper.GetString("consumer_secret"), viper.GetString("access_token"),
viper.GetString("access_token_secret")}
err = post(creds, apt)
default:
fmt.Printf("%s [download|reload|generate|post]\n", os.Args[0])
}
if err != nil {
fmt.Println(err)
os.Exit(1)
}
}