todo/cmd/todo.go

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package cmd
import (
"time"
"gorm.io/driver/sqlite"
"gorm.io/gorm"
)
type Todo struct {
ID uint64
Desc string
DueDate time.Time
CreatedAt time.Time
}
func errPanic(err error, msg string) {
if err != nil {
panic(msg)
}
}
func parseDateString(date string) time.Time {
var (
t time.Time
err error
layouts = []string{
"02/01/2006",
"02/01/2006T15:04",
}
)
for _, layout := range layouts {
t, err = time.Parse(layout, date)
if err == nil {
return t
}
}
return time.Time{}
}
func openDB() *gorm.DB {
db, err := gorm.Open(sqlite.Open("todo.db"), &gorm.Config{})
errPanic(err, "failed to connect database")
return db
}
func createTodo(desc string, date string) {
db := openDB()
err := db.AutoMigrate(&Todo{})
errPanic(err, "failed to migrate database")
d := parseDateString(date)
t := Todo{Desc: desc, DueDate: d, CreatedAt: time.Now()}
db.Create(&t)
}
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func updateTodo(id uint64, new Todo) {
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db := openDB()
var t Todo
res := db.First(&t, id)
errPanic(res.Error, "failed to find id")
new.ID = t.ID
db.Model(&t).Updates(new)
}
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func deleteTodo(id uint64) {
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db := openDB()
db.Delete(&Todo{}, id)
}
func getAllTodos() []Todo {
db := openDB()
var todos []Todo
res := db.Find(&todos)
errPanic(res.Error, "failed to get all todos")
return todos
}