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users.go
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users.go
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package bolt
import (
"context"
"fmt"
"github.com/boltdb/bolt"
cmp "github.com/snetsystems/cmp/backend"
"github.com/snetsystems/cmp/backend/bolt/internal"
)
// Ensure UsersStore implements cmp.UsersStore.
var _ cmp.UsersStore = &UsersStore{}
// UsersBucket is used to store users local to cmp
var UsersBucket = []byte("UsersV2")
// UsersStore uses bolt to store and retrieve users
type UsersStore struct {
client *Client
}
// get searches the UsersStore for user with id and returns the bolt representation
func (s *UsersStore) get(ctx context.Context, id uint64) (*cmp.User, error) {
var u cmp.User
err := s.client.db.View(func(tx *bolt.Tx) error {
v := tx.Bucket(UsersBucket).Get(u64tob(id))
if v == nil {
return cmp.ErrUserNotFound
}
return internal.UnmarshalUser(v, &u)
})
if err != nil {
return nil, err
}
return &u, nil
}
func (s *UsersStore) each(ctx context.Context, fn func(*cmp.User)) error {
return s.client.db.View(func(tx *bolt.Tx) error {
return tx.Bucket(UsersBucket).ForEach(func(k, v []byte) error {
var user cmp.User
if err := internal.UnmarshalUser(v, &user); err != nil {
return err
}
fn(&user)
return nil
})
})
}
// Num returns the number of users in the UsersStore
func (s *UsersStore) Num(ctx context.Context) (int, error) {
count := 0
err := s.client.db.View(func(tx *bolt.Tx) error {
return tx.Bucket(UsersBucket).ForEach(func(k, v []byte) error {
count++
return nil
})
})
if err != nil {
return 0, err
}
return count, nil
}
// Get searches the UsersStore for user with name
func (s *UsersStore) Get(ctx context.Context, q cmp.UserQuery) (*cmp.User, error) {
if q.ID != nil {
return s.get(ctx, *q.ID)
}
if q.Name != nil && q.Provider != nil && q.Scheme != nil {
var user *cmp.User
err := s.each(ctx, func(u *cmp.User) {
if user != nil {
return
}
if u.Name == *q.Name && u.Provider == *q.Provider && u.Scheme == *q.Scheme {
user = u
}
})
if err != nil {
return nil, err
}
if user == nil {
return nil, cmp.ErrUserNotFound
}
return user, nil
}
return nil, fmt.Errorf("must specify either ID, or Name, Provider, and Scheme in UserQuery")
}
func (s *UsersStore) userExists(ctx context.Context, u *cmp.User) (bool, error) {
_, err := s.Get(ctx, cmp.UserQuery{
Name: &u.Name,
Provider: &u.Provider,
Scheme: &u.Scheme,
})
if err == cmp.ErrUserNotFound {
return false, nil
}
if err != nil {
return false, err
}
return true, nil
}
// Add a new User to the UsersStore.
func (s *UsersStore) Add(ctx context.Context, u *cmp.User) (*cmp.User, error) {
if u == nil {
return nil, fmt.Errorf("user provided is nil")
}
userExists, err := s.userExists(ctx, u)
if err != nil {
return nil, err
}
if userExists {
return nil, cmp.ErrUserAlreadyExists
}
if err := s.client.db.Update(func(tx *bolt.Tx) error {
b := tx.Bucket(UsersBucket)
seq, err := b.NextSequence()
if err != nil {
return err
}
u.ID = seq
if v, err := internal.MarshalUser(u); err != nil {
return err
} else if err := b.Put(u64tob(seq), v); err != nil {
return err
}
return nil
}); err != nil {
return nil, err
}
return u, nil
}
// Delete a user from the UsersStore
func (s *UsersStore) Delete(ctx context.Context, u *cmp.User) error {
_, err := s.get(ctx, u.ID)
if err != nil {
return err
}
return s.client.db.Update(func(tx *bolt.Tx) error {
return tx.Bucket(UsersBucket).Delete(u64tob(u.ID))
})
}
// Update a user
func (s *UsersStore) Update(ctx context.Context, u *cmp.User) error {
_, err := s.get(ctx, u.ID)
if err != nil {
return err
}
return s.client.db.Update(func(tx *bolt.Tx) error {
if v, err := internal.MarshalUser(u); err != nil {
return err
} else if err := tx.Bucket(UsersBucket).Put(u64tob(u.ID), v); err != nil {
return err
}
return nil
})
}
// All returns all users
func (s *UsersStore) All(ctx context.Context) ([]cmp.User, error) {
var users []cmp.User
if err := s.client.db.View(func(tx *bolt.Tx) error {
return tx.Bucket(UsersBucket).ForEach(func(k, v []byte) error {
var user cmp.User
if err := internal.UnmarshalUser(v, &user); err != nil {
return err
}
users = append(users, user)
return nil
})
}); err != nil {
return nil, err
}
return users, nil
}