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package main
import (
"fmt"
"math/rand"
"os"
"go.wit.com/log"
)
// sent via -ldflags
var VERSION string
var BUILDTIME string
var counter int = rand.Intn(100)
func main() {
var pb *Fruits
pb = new(Fruits)
if err := pb.loadBasket(); err != nil {
log.Info("First time user?")
}
// attempt to load basket.pb
fruit := &Fruit{
Brand: "mom",
City: "New NewYork",
UPC: "2000",
}
pb.Fruits = append(pb.Fruits, fruit)
a := &Fruit{
Brand: "fry",
City: "the moon",
UPC: "2001",
}
pb.Fruits = append(pb.Fruits, a)
b := pb.getNewFruit()
pb.Fruits = append(pb.Fruits, b)
pb.saveBasket()
if err := pb.loadBasket(); err != nil {
badExit(err)
}
pb.printTable()
}
func (pb *Fruits) addFruits(i int) {
var x int
for x < i {
x += 1
b := pb.getNewFruit()
pb.Fruits = append(pb.Fruits, b)
}
}
func (pb *Fruits) getNewFruit() *Fruit {
counter += rand.Intn(10)
upc := fmt.Sprintf("%d", counter)
a := &Fruit{
Brand: "fry",
City: "the moon",
UPC: upc,
}
return a
}
func (pb *Fruits) saveBasket() error {
data, err := pb.Marshal()
if err != nil {
return err
}
w, err := os.OpenFile("basket.pb", os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644)
if err != nil {
return err
}
w.Write(data)
w.Close()
log.Info("saved basket.pb ok")
return nil
}
func badExit(err error) {
log.Info("autogenpb error:", err)
os.Exit(-1)
}
func (pb *Fruits) loadBasket() error {
if pb == nil {
pb = new(Fruits)
}
data, err := os.ReadFile("basket.pb")
if err != nil {
return err
}
if err := pb.Unmarshal(data); err != nil {
return err
}
log.Info("loaded basket.pb ok")
return nil
}
func (pb *Fruits) printTable() {
var count int
all := pb.All()
for all.Scan() {
tmp := all.Next()
count += 1
log.Printf("found %d %s %s %s\n", count, tmp.Brand, tmp.City, tmp.UPC)
if count > 10 {
break
}
}
log.Printf("Total entries: %d\n", pb.Len())
}
func (pb *Fruits) sortTable(i int) {
var count int
for fruit := range pb.IterByBrand() {
count += 1
log.Printf("found %d %s %s\n", count, fruit.Brand, fruit.City)
if count > i {
break
}
}
log.Printf("Total entries: %d\n", pb.Len())
}
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