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datastore.go
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datastore.go
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package datastore
import (
"context"
"encoding/json"
"fmt"
"io/ioutil"
"cloud.google.com/go/datastore"
"github.com/skuid/helm-value-store/store"
"google.golang.org/api/option"
)
const kind = "hvsRelease"
// ReleaseStore stores and retrieves releases from a GCP Datastore table
type ReleaseStore struct {
client *datastore.Client
}
type serviceAccount struct {
ProjectID string `json:"project_id"`
}
// NewReleaseStore creates a new ReleaseStore
func NewReleaseStore(serviceAccountFile string) (*ReleaseStore, error) {
data, err := ioutil.ReadFile(serviceAccountFile)
if err != nil {
return nil, fmt.Errorf("Error opening service account file: %q", err)
}
sa := &serviceAccount{}
err = json.Unmarshal(data, sa)
if err != nil {
return nil, fmt.Errorf("Error parsing service account file: %q", err)
}
client, err := datastore.NewClient(context.Background(), sa.ProjectID, option.WithServiceAccountFile(serviceAccountFile))
if err != nil {
return nil, fmt.Errorf("Failed to create client: %q", err)
}
rs := &ReleaseStore{client: client}
return rs, nil
}
// Get gets a release by it's UniqueID
func (rs ReleaseStore) Get(ctx context.Context, uniqueID string) (*store.Release, error) {
response := &store.Release{}
key := datastore.NameKey(kind, uniqueID, nil)
if err := rs.client.Get(ctx, key, response); err != nil {
return nil, fmt.Errorf("Error getting release: %q", err)
}
return response, nil
}
// Delete deletes a release by it's UniqueID
func (rs ReleaseStore) Delete(ctx context.Context, uniqueID string) error {
key := datastore.NameKey(kind, uniqueID, nil)
if err := rs.client.Delete(ctx, key); err != nil {
return fmt.Errorf("Error deleting release: %q", err)
}
return nil
}
// Put creates or updates a release
func (rs ReleaseStore) Put(ctx context.Context, r store.Release) error {
key := datastore.NameKey(kind, r.UniqueID, nil)
if _, err := rs.client.Put(ctx, key, &r); err != nil {
return fmt.Errorf("Error putting release: %q", err)
}
return nil
}
// List returns releases
func (rs ReleaseStore) List(ctx context.Context, selector map[string]string) (store.Releases, error) {
releases := &store.Releases{}
query := datastore.NewQuery(kind)
_, err := rs.client.GetAll(ctx, query, releases)
if err != nil {
return nil, fmt.Errorf("Error getting releases: %q", err)
}
response := store.Releases{}
for _, r := range *releases {
if r.MatchesSelector(selector) {
response = append(response, r)
}
}
return response, nil
}
// Load bulk-writes releases to datastore
func (rs ReleaseStore) Load(ctx context.Context, releases store.Releases) error {
keys := []*datastore.Key{}
input := []*store.Release{}
for i, r := range releases {
keys = append(keys, datastore.NameKey(kind, r.UniqueID, nil))
input = append(input, &releases[i])
}
if _, err := rs.client.PutMulti(context.Background(), keys, input); err != nil {
return fmt.Errorf("Error loading releases: %q", err)
}
return nil
}
// Setup satisfies the RelaseStore interface. No action is required
func (rs ReleaseStore) Setup(ctx context.Context) error { return nil }