bouncer/internal/store/redis/layer_repository.go

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2023-04-24 20:52:12 +02:00
package redis
import (
"context"
"time"
"forge.cadoles.com/cadoles/bouncer/internal/store"
"github.com/pkg/errors"
"github.com/redis/go-redis/v9"
)
const (
keyPrefixLayer = "layer"
)
type LayerRepository struct {
client redis.UniversalClient
}
// CreateLayer implements store.LayerRepository
func (r *LayerRepository) CreateLayer(ctx context.Context, proxyName store.ProxyName, layerName store.LayerName, layerType store.LayerType, options store.LayerOptions) (*store.Layer, error) {
now := time.Now().UTC()
key := layerKey(proxyName, layerName)
layerItem := &layerItem{
layerHeaderItem: layerHeaderItem{
Proxy: string(proxyName),
Name: string(layerName),
Type: string(layerType),
Weight: 0,
Enabled: false,
},
CreatedAt: wrap(now),
UpdatedAt: wrap(now),
Options: wrap(store.LayerOptions{}),
}
txf := func(tx *redis.Tx) error {
exists, err := tx.Exists(ctx, key).Uint64()
if err != nil {
return errors.WithStack(err)
}
if exists > 0 {
return errors.WithStack(store.ErrAlreadyExist)
}
_, err = tx.TxPipelined(ctx, func(p redis.Pipeliner) error {
p.HMSet(ctx, key, &layerItem.layerHeaderItem)
p.HMSet(ctx, key, layerItem)
return nil
})
if err != nil {
return errors.WithStack(err)
}
return nil
}
err := r.client.Watch(ctx, txf, key)
if err != nil {
return nil, errors.WithStack(err)
}
return &store.Layer{
LayerHeader: store.LayerHeader{
Name: layerName,
Proxy: proxyName,
Type: layerType,
Weight: 0,
Enabled: false,
},
CreatedAt: now,
UpdatedAt: now,
Options: store.LayerOptions{},
}, nil
}
// DeleteLayer implements store.LayerRepository
func (r *LayerRepository) DeleteLayer(ctx context.Context, proxyName store.ProxyName, layerName store.LayerName) error {
key := layerKey(proxyName, layerName)
if cmd := r.client.Del(ctx, key); cmd.Err() != nil {
return errors.WithStack(cmd.Err())
}
return nil
}
// GetLayer implements store.LayerRepository
func (r *LayerRepository) GetLayer(ctx context.Context, proxyName store.ProxyName, layerName store.LayerName) (*store.Layer, error) {
key := layerKey(proxyName, layerName)
var layerItem *layerItem
err := WithTx(ctx, r.client, key, func(ctx context.Context, tx *redis.Tx) error {
pItem, err := r.txGetLayerItem(ctx, tx, proxyName, layerName)
if err != nil {
return errors.WithStack(err)
}
layerItem = pItem
return nil
})
if err != nil {
return nil, errors.WithStack(err)
}
layer, err := layerItem.ToLayer()
if err != nil {
return nil, errors.WithStack(err)
}
return layer, nil
}
func (r *LayerRepository) txGetLayerItem(ctx context.Context, tx *redis.Tx, proxyName store.ProxyName, layerName store.LayerName) (*layerItem, error) {
layerItem := layerItem{}
key := layerKey(proxyName, layerName)
exists, err := tx.Exists(ctx, key).Uint64()
if err != nil {
return nil, errors.WithStack(err)
}
if exists == 0 {
return nil, errors.WithStack(store.ErrNotFound)
}
if err := tx.HGetAll(ctx, key).Scan(&layerItem.layerHeaderItem); err != nil {
return nil, errors.WithStack(err)
}
if err := tx.HGetAll(ctx, key).Scan(&layerItem); err != nil {
return nil, errors.WithStack(err)
}
return &layerItem, nil
}
// QueryLayers implements store.LayerRepository
func (r *LayerRepository) QueryLayers(ctx context.Context, proxyName store.ProxyName, funcs ...store.QueryLayerOptionFunc) ([]*store.LayerHeader, error) {
opts := store.DefaultQueryLayerOptions()
for _, fn := range funcs {
fn(opts)
}
keyParts := []string{keyPrefixLayer, string(proxyName)}
if opts.Name != nil {
keyParts = append(keyParts, string(*opts.Name))
} else {
keyParts = append(keyParts, "*")
}
key := key(keyParts...)
iter := r.client.Scan(ctx, 0, key, 0).Iterator()
headers := make([]*store.LayerHeader, 0)
for iter.Next(ctx) {
key := iter.Val()
layerHeaderItem := &layerHeaderItem{}
if err := r.client.HGetAll(ctx, key).Scan(layerHeaderItem); err != nil {
return nil, errors.WithStack(err)
}
layerHeader, err := layerHeaderItem.ToLayerHeader()
if err != nil {
return nil, errors.WithStack(err)
}
headers = append(headers, layerHeader)
}
if err := iter.Err(); err != nil {
return nil, errors.WithStack(err)
}
return headers, nil
}
// UpdateLayer implements store.LayerRepository
func (r *LayerRepository) UpdateLayer(ctx context.Context, proxyName store.ProxyName, layerName store.LayerName, funcs ...store.UpdateLayerOptionFunc) (*store.Layer, error) {
opts := &store.UpdateLayerOptions{}
for _, fn := range funcs {
fn(opts)
}
key := layerKey(proxyName, layerName)
var layerItem layerItem
err := WithTx(ctx, r.client, key, func(ctx context.Context, tx *redis.Tx) error {
item, err := r.txGetLayerItem(ctx, tx, proxyName, layerName)
if err != nil {
return errors.WithStack(err)
}
if opts.Enabled != nil {
item.Enabled = *opts.Enabled
}
if opts.Weight != nil {
item.Weight = *opts.Weight
}
if opts.Options != nil {
item.Options = wrap(*opts.Options)
}
item.UpdatedAt = wrap(time.Now().UTC())
_, err = tx.TxPipelined(ctx, func(p redis.Pipeliner) error {
p.HMSet(ctx, key, item.layerHeaderItem)
p.HMSet(ctx, key, item)
return nil
})
if err != nil {
return errors.WithStack(err)
}
layerItem = *item
return nil
})
if err != nil {
return nil, errors.WithStack(err)
}
layer, err := layerItem.ToLayer()
if err != nil {
return nil, errors.WithStack(err)
}
return layer, nil
}
func NewLayerRepository(client redis.UniversalClient) *LayerRepository {
return &LayerRepository{
client: client,
}
}
var _ store.LayerRepository = &LayerRepository{}
func layerKey(proxyName store.ProxyName, layerName store.LayerName) string {
return key(keyPrefixLayer, string(proxyName), string(layerName))
}