47 lines
1015 B
Go
47 lines
1015 B
Go
package storage
|
|
|
|
import (
|
|
"encoding/json"
|
|
"errors"
|
|
"fmt"
|
|
"github.com/eslider/superherohub/pkg/deesee"
|
|
"os"
|
|
"strings"
|
|
)
|
|
|
|
type DeeSee []*deesee.Superhero
|
|
|
|
// New DeeSee storage.
|
|
func New(path string) (d *DeeSee, err error) {
|
|
d = &DeeSee{}
|
|
err = d.Load(path)
|
|
return
|
|
}
|
|
|
|
// Load superheroes from json file
|
|
func (s *DeeSee) Load(path string) (err error) {
|
|
// Read and unmarshal s from json f path
|
|
f, err := os.OpenFile(path, os.O_RDONLY, 0644)
|
|
if err != nil {
|
|
return fmt.Errorf("unable to read f: %w", err)
|
|
}
|
|
|
|
return json.NewDecoder(f).Decode(s)
|
|
}
|
|
|
|
// Store superhero
|
|
func (s *DeeSee) Store(hero *deesee.Superhero) (err error) {
|
|
// Check if superhero superpower is acceptable
|
|
if !hero.IsAcceptable() {
|
|
return errors.New(fmt.Sprintf("Hero power is not acceptable: %s", hero.Name))
|
|
}
|
|
|
|
// Prevent to store duplicate superheroes
|
|
if deesee.FindByName(*s, strings.TrimSpace(hero.Name)) != nil {
|
|
return errors.New(fmt.Sprintf("Hero already exists: %s", hero.Name))
|
|
}
|
|
|
|
*s = append(*s, hero)
|
|
return
|
|
}
|