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app.go
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app.go
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package boltdb
import (
"encoding/json"
"fmt"
"log"
"strings"
"github.com/madappgang/identifo/v2/model"
"github.com/rs/xid"
bolt "go.etcd.io/bbolt"
)
const (
// AppBucket is a name for bucket with apps.
AppBucket = "Apps"
)
// NewAppStorage creates new BoltDB AppStorage implementation.
func NewAppStorage(settings model.BoltDBDatabaseSettings) (model.AppStorage, error) {
if len(settings.Path) == 0 {
return nil, fmt.Errorf("unable to find init boltdb storage with empty database path")
}
// init database
db, err := InitDB(settings.Path)
if err != nil {
return nil, err
}
as := AppStorage{db: db}
// ensure we have app's bucket in the database
if err := db.Update(func(tx *bolt.Tx) error {
if _, err := tx.CreateBucketIfNotExists([]byte(AppBucket)); err != nil {
return fmt.Errorf("create bucket: %s", err)
}
return nil
}); err != nil {
return nil, err
}
return &as, nil
}
// AppStorage is a fully functional app storage.
type AppStorage struct {
db *bolt.DB
}
// AppByID returns app from memory by ID.
func (as *AppStorage) AppByID(id string) (model.AppData, error) {
res := model.AppData{}
if err := as.db.View(func(tx *bolt.Tx) error {
ab := tx.Bucket([]byte(AppBucket))
app := ab.Get([]byte(id))
if app == nil {
return model.ErrorNotFound
}
var err error
res, err = model.AppDataFromJSON(app)
return err
}); err != nil {
return model.AppData{}, err
}
return res, nil
}
// ActiveAppByID returns app by id only if it's active.
func (as *AppStorage) ActiveAppByID(appID string) (model.AppData, error) {
if appID == "" {
return model.AppData{}, ErrorEmptyAppID
}
app, err := as.AppByID(appID)
if err != nil {
return model.AppData{}, err
}
if !app.Active {
return model.AppData{}, ErrorInactiveApp
}
return app, nil
}
// CreateApp creates new app in BoltDB.
func (as *AppStorage) CreateApp(app model.AppData) (model.AppData, error) {
if len(app.ID) == 0 {
app.ID = xid.New().String()
}
return app, as.db.Update(func(tx *bolt.Tx) error {
data, err := json.Marshal(app)
if err != nil {
return err
}
ab := tx.Bucket([]byte(AppBucket))
return ab.Put([]byte(app.ID), data)
})
}
// DisableApp disables app in the storage.
func (as *AppStorage) DisableApp(app model.AppData) error {
app.Active = false
_, err := as.CreateApp(app)
return err
}
// UpdateApp updates app in the storage.
func (as *AppStorage) UpdateApp(appID string, newApp model.AppData) (model.AppData, error) {
// use ID from the request if it's not set
if len(newApp.ID) == 0 {
newApp.ID = appID
}
err := as.db.Update(func(tx *bolt.Tx) error {
data, err := json.Marshal(newApp)
if err != nil {
return err
}
ab := tx.Bucket([]byte(AppBucket))
if err := ab.Delete([]byte(appID)); err != nil {
return err
}
return ab.Put([]byte(newApp.ID), data)
})
if err != nil {
return model.AppData{}, err
}
updatedApp, err := as.AppByID(newApp.ID)
return updatedApp, err
}
// FetchApps fetches apps which name satisfies provided filterString.
// Supports pagination.
func (as *AppStorage) FetchApps(filterString string) ([]model.AppData, error) {
apps := []model.AppData{}
err := as.db.View(func(tx *bolt.Tx) error {
ab := tx.Bucket([]byte(AppBucket))
if iterErr := ab.ForEach(func(k, v []byte) error {
if strings.Contains(strings.ToLower(string(k)), strings.ToLower(filterString)) {
app, err := model.AppDataFromJSON(v)
if err != nil {
return err
}
apps = append(apps, app)
}
return nil
}); iterErr != nil {
return iterErr
}
return nil
})
if err != nil {
return []model.AppData{}, err
}
return apps, nil
}
// DeleteApp deletes app by ID.
func (as *AppStorage) DeleteApp(id string) error {
err := as.db.Update(func(tx *bolt.Tx) error {
ab := tx.Bucket([]byte(AppBucket))
return ab.Delete([]byte(id))
})
return err
}
// TestDatabaseConnection checks whether we can fetch the first document in the applications bucket.
func (as *AppStorage) TestDatabaseConnection() error {
err := as.db.View(func(tx *bolt.Tx) error {
ab := tx.Bucket([]byte(AppBucket))
return ab.ForEach(func(k, v []byte) error {
_, err := model.AppDataFromJSON(v)
return err
})
})
return err
}
// ImportJSON imports data from JSON.
func (as *AppStorage) ImportJSON(data []byte, cleanOldData bool) error {
if cleanOldData {
if err := as.db.Update(func(tx *bolt.Tx) error {
tx.DeleteBucket([]byte(AppBucket))
if _, err := tx.CreateBucketIfNotExists([]byte(AppBucket)); err != nil {
return fmt.Errorf("create bucket: %s", err)
}
return nil
}); err != nil {
return err
}
}
apd := []model.AppData{}
if err := json.Unmarshal(data, &apd); err != nil {
log.Println(err)
return err
}
for _, a := range apd {
if _, err := as.CreateApp(a); err != nil {
return err
}
}
return nil
}
// Close closes underlying database.
func (as *AppStorage) Close() {
if err := CloseDB(as.db); err != nil {
log.Printf("Error closing app storage: %s\n", err)
}
}