Elton Minetto
42 lines
716 B
Go
42 lines
716 B
Go
package entity
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import (
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"time"
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)
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//Book data
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type Book struct {
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ID ID
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Title string
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Author string
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Pages int
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Quantity int
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CreatedAt time.Time
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UpdatedAt time.Time
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}
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//NewBook create a new book
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func NewBook(title string, author string, pages int, quantity int) (*Book, error) {
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b := &Book{
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ID: NewID(),
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Title: title,
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Author: author,
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Pages: pages,
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Quantity: quantity,
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CreatedAt: time.Now(),
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}
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err := b.Validate()
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if err != nil {
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return nil, ErrInvalidEntity
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}
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return b, nil
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}
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//Validate validate book
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func (b *Book) Validate() error {
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if b.Title == "" || b.Author == "" || b.Pages <= 0 || b.Quantity <= 0 {
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return ErrInvalidEntity
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}
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return nil
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}
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