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main.go
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main.go
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package main
import (
"context"
"database/sql"
"embed"
"encoding/gob"
"flag"
"fmt"
"io"
"log"
"net/http"
"os"
"path/filepath"
"strings"
"time"
"github.com/gen2brain/dlgs"
"github.com/google/logger"
"github.com/pkg/errors"
"github.com/wolftotem4/go-dope-ben-don/config"
"github.com/wolftotem4/go-dope-ben-don/internal/app"
"github.com/wolftotem4/go-dope-ben-don/internal/client"
"github.com/wolftotem4/go-dope-ben-don/internal/conducts"
"github.com/wolftotem4/go-dope-ben-don/internal/gui"
typesjson "github.com/wolftotem4/go-dope-ben-don/internal/types/json"
)
const (
appName = "go-dope-ben-don"
)
//go:embed data/* .env.example assets/information.png
var embedFS embed.FS
var performLogout = flag.Bool("logout", false, "Perform logout")
var account = flag.String("account", "", "Provide a account to login dinbendon.net")
var password = flag.String("password", "", "Provide a password to login dinbendon.net")
var name = flag.String("name", "", "Provide a name for matching ordered items")
var Notify chan typesjson.ProgressItem
type stackTracer interface {
StackTrace() errors.StackTrace
}
func main() {
ctx := context.Background()
flag.Parse()
gob.Register(http.Cookie{})
dir, err := app.GetConfigDir(appName)
if err != nil {
handleFatal(err)
}
// generate '.env' if necessary
if err := generateConfigFile(dir); err != nil {
handleFatal(err)
}
// generate assets
if err := copyAssets(dir); err != nil {
handleFatal(err)
}
// init error logger
lf, err := os.OpenFile(filepath.Join(dir, "error.log"), os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0660)
if err != nil {
handleFatal(errors.Wrap(err, "Failed to open log file"))
}
defer lf.Close()
defer logger.Init("go-dope-ben-don", false, true, lf).Close()
// init config & client
app, err := app.Register(dir)
if err != nil {
handleFatal(err)
}
applyFlagsToConfig(app.Config)
// init database & load Cookies
if err := boot(ctx, app); err != nil {
handleFatal(err)
}
if *performLogout {
log.Println("Logging out...")
if err := conducts.Logout(ctx, app); err != nil {
handleFatal(err)
}
log.Println("Logged out.")
if err := app.RealClient.Store.Save(ctx); err != nil {
handleFatal(err)
}
} else {
g, err := gui.New(dir, appName)
if err != nil {
handleFatal(err)
}
defer g.Close()
g.HandleSignals()
g.Build()
go func() {
// A value generated by session on webpage.
// Some APIs needs the interface value to work.
var interfaceValue = 0
// How often to call heartbeat to prevent session from expiring
heartbeat := time.NewTicker(3 * time.Minute)
job:
for {
log.Println("Getting prompt items...")
prompt, err := conducts.GetPromptItems(ctx, app, interfaceValue)
if err != nil {
handleFatal(err)
}
log.Printf("Got prompt items. (%d found)\n", len(prompt.Items))
interfaceValue = prompt.Interface
for _, item := range prompt.Items {
u, err := app.RealClient.Endpoint(item.GetPath())
if err != nil {
handleFatal(err)
}
if err := g.Notify(gui.PromptItemInfo{
Name: item.ShopName,
Url: u.String(),
}); err != nil {
handleFatal(err)
}
}
if err := app.RealClient.Store.Save(ctx); err != nil {
handleFatal(err)
}
sleep := prompt.UpdateTimer.C
sleep:
for {
select {
case <-g.Quit:
heartbeat.Stop()
break job
case err := <-g.EventErr:
handleError(err.Cause())
case <-sleep:
break sleep
case <-heartbeat.C:
// call heartbeat to prevent session from expiring
callHeartbeat(ctx, app, interfaceValue)
}
}
}
}()
g.Wait()
}
}
func callHeartbeat(ctx context.Context, app *app.App, interfaceValue int) {
ctx, cancel := context.WithTimeout(ctx, 5*time.Second)
defer cancel()
u := fmt.Sprintf("/do/?wicket:interface=:%d:heartbeat:-1:IUnversionedBehaviorListener&wicket:behaviorId=0&wicket:ignoreIfNotActive=true&random=", interfaceValue)
log.Println("Calling heartbeat...")
_, err := app.Client.Call(ctx, u, client.Webpage)
if err != nil {
handleError(err)
return
}
log.Println("Called heartbeat.")
}
func boot(ctx context.Context, app *app.App) error {
if err := createTable(ctx, app.DB.DB); err != nil {
return errors.WithStack(err)
}
if err := app.RealClient.Load(ctx); err != nil {
return errors.WithStack(err)
}
return nil
}
func createTable(ctx context.Context, db *sql.DB) error {
ctx, cancel := context.WithTimeout(ctx, 5*time.Second)
defer cancel()
s, err := embedFS.ReadFile("data/create_tables.sql")
if err != nil {
return errors.WithStack(err)
}
_, err = db.ExecContext(ctx, string(s))
if err != nil {
return errors.WithStack(err)
}
return nil
}
func applyFlagsToConfig(config *config.App) {
if *account != "" {
config.Account = *account
}
if *password != "" {
config.Password = *password
}
if *name != "" {
config.Name = *name
}
}
func generateConfigFile(dir string) error {
if hasAllCLIUserData() {
return nil
}
env := filepath.Join(dir, config.EnvFileName)
// check if file exists
if _, err := os.Stat(env); err == nil {
return nil
} else if !errors.Is(err, os.ErrNotExist) {
return errors.WithStack(err)
}
// generate '.env' file
if err := generateFile(".env.example", env); err != nil {
return errors.WithStack(err)
}
// inform user to edit '.env' file
dlgs.Info("夠多便當", fmt.Sprintf("請編輯 .env 檔案,再重新執行 (%s)", env))
os.Exit(0)
return nil
}
func hasAllCLIUserData() bool {
return *account != "" && *password != "" && *name != ""
}
func handleError(err error) {
if stackErr, ok := err.(stackTracer); ok {
var buffer strings.Builder
buffer.WriteString(fmt.Sprintf("%s\n", err.Error()))
for _, f := range stackErr.StackTrace() {
buffer.WriteString(fmt.Sprintf("%+s:%d\n", f, f))
}
logger.Error(buffer.String())
} else {
logger.Error(err)
}
}
func handleFatal(err error) {
handleError(err)
dlgs.Error("夠多便當", err.Error())
os.Exit(1)
}
func copyAssets(dir string) error {
assetsDir := filepath.Join(dir, "assets")
if err := os.MkdirAll(assetsDir, os.ModePerm); err != nil {
return errors.WithStack(err)
}
icon := filepath.Join(assetsDir, "information.png")
// check if file exists
if _, err := os.Stat(icon); err == nil {
return nil
} else if !errors.Is(err, os.ErrNotExist) {
return errors.WithStack(err)
}
if err := generateFile("assets/information.png", icon); err != nil {
return errors.WithStack(err)
}
return nil
}
func generateFile(embed string, dst string) error {
srcFS, err := embedFS.Open(embed)
if err != nil {
return errors.WithStack(err)
}
defer srcFS.Close()
dstFS, err := os.Create(dst)
if err != nil {
return errors.WithStack(err)
}
defer dstFS.Close()
if _, err := io.Copy(dstFS, srcFS); err != nil {
return errors.WithStack(err)
}
return nil
}