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main.go
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main.go
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package main
import (
"fmt"
"io"
"log"
"net/http"
"os"
"path"
"path/filepath"
"strings"
"sync"
)
type Rom struct {
Platform string
Path string
Name string
URL string
Error error
}
type PlatformMapping struct {
Name string
Extensions []string
}
var mappings []PlatformMapping = []PlatformMapping{
PlatformMapping{"NES", []string{"nes"}},
PlatformMapping{"SNES", []string{"smc"}},
PlatformMapping{"N64", []string{"z64"}},
}
func usage(err string) {
if err != "" {
fmt.Println(err)
}
fmt.Printf("usage: %s <rom path> <image path>\n", os.Args[0])
os.Exit(1)
}
func main() {
if len(os.Args) != 3 {
usage("")
}
log.Println("Gathering ROMs...")
roms := []*Rom{}
for _, mapping := range mappings {
for _, extension := range mapping.Extensions {
paths, err := filepath.Glob(filepath.Join(os.Args[1], "*."+extension))
if err != nil {
log.Fatal(err)
}
for _, fullpath := range paths {
roms = append(roms, &Rom{mapping.Name, fullpath, strings.TrimSuffix(path.Base(fullpath), "."+extension), "", nil})
}
}
}
log.Println("Fetching ROM information...")
var wg sync.WaitGroup
src := make(chan *Rom)
for i := 0; i < 4; i++ {
wg.Add(1)
go func() {
defer wg.Done()
for rom := range src {
url, err := SearchForGame(rom.Platform, rom.Name)
if err != nil {
rom.Error = err
} else {
rom.URL = url
}
}
}()
}
for _, rom := range roms {
src <- rom
}
close(src)
wg.Wait()
fmt.Println("Downloading covers...")
src = make(chan *Rom)
for i := 0; i < 4; i++ {
wg.Add(1)
go func() {
defer wg.Done()
for rom := range src {
out, err := os.Create(path.Join(os.Args[2], rom.Name+".png")) // TODO: PNG assumed here.
if err != nil {
rom.Error = err
continue
}
defer out.Close() // TODO: This close is defered until loop exits.
resp, err := http.Get(rom.URL)
if err != nil {
rom.Error = err
continue
}
defer resp.Body.Close() // TODO: Likewise.
_, err = io.Copy(out, resp.Body)
if err != nil {
rom.Error = err
continue
}
}
}()
}
for _, rom := range roms {
if rom.Error != nil {
continue
}
src <- rom
}
close(src)
wg.Wait()
for _, rom := range roms {
if rom.Error != nil {
log.Printf("[%s] %s - %s\n", rom.Platform, rom.Name, rom.Error)
} else {
log.Printf("[%s] %s - Downloaded!\n", rom.Platform, rom.Name)
}
}
}