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db.go
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db.go
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package frfsdb
import (
"context"
"encoding/hex"
"errors"
"fmt"
"io"
"os"
"path/filepath"
"time"
"github.com/companyzero/bisonrelay/ratchet"
"github.com/companyzero/bisonrelay/server/serverdb"
)
type fsdb struct {
rootMsgs string
rootSubs string
rootRedeemedPushPayments string
}
func NewFSDB(rootMsgs, rootSubs string) (serverdb.ServerDB, error) {
err := os.MkdirAll(rootMsgs, 0700)
if err != nil {
return nil, err
}
err = os.MkdirAll(rootSubs, 0700)
if err != nil {
return nil, err
}
rootRedeemedPushPayments := filepath.Join(rootMsgs, "redeemedPayments")
if err := os.MkdirAll(rootRedeemedPushPayments, 0700); err != nil {
return nil, err
}
return &fsdb{
rootMsgs: rootMsgs,
rootSubs: rootSubs,
rootRedeemedPushPayments: rootRedeemedPushPayments,
}, nil
}
// Static assertion that fsdb implements ServerDB.
var _ serverdb.ServerDB = (*fsdb)(nil)
func (db *fsdb) StorePayload(ctx context.Context, rv ratchet.RVPoint, payload []byte, insertTime time.Time) error {
filename := filepath.Join(db.rootMsgs, rv.String())
if _, err := os.Stat(filename); !os.IsNotExist(err) {
// File already exists. Return appropriate error.
return fmt.Errorf("RV %s: %w", rv, serverdb.ErrAlreadyStoredRV)
}
return os.WriteFile(filename, payload, 0600)
}
func (db *fsdb) FetchPayload(ctx context.Context, rv ratchet.RVPoint) (*serverdb.FetchPayloadResult, error) {
filename := filepath.Join(db.rootMsgs, rv.String())
// Read content
data, err := os.ReadFile(filename)
if os.IsNotExist(err) {
// File doesn't exist.
return nil, nil
} else if err != nil {
return nil, err
}
stat, err := os.Stat(filename)
if err != nil {
return nil, err
}
return &serverdb.FetchPayloadResult{
Payload: data,
InsertTime: stat.ModTime(),
}, nil
}
func (db *fsdb) RemovePayload(ctx context.Context, rv ratchet.RVPoint) error {
filename := filepath.Join(db.rootMsgs, rv.String())
err := os.Remove(filename)
if os.IsNotExist(err) {
// File doesn't exist, so not an error.
return nil
}
return err
}
func (db *fsdb) IsSubscriptionPaid(ctx context.Context, rv ratchet.RVPoint) (bool, error) {
fname := filepath.Join(db.rootSubs, rv.String())
_, err := os.Stat(fname)
if os.IsNotExist(err) {
return false, nil
}
if err != nil {
return false, err
}
return true, nil
}
func (db *fsdb) StoreSubscriptionPaid(ctx context.Context, rv ratchet.RVPoint, insertTime time.Time) error {
fname := filepath.Join(db.rootSubs, rv.String())
return os.WriteFile(fname, nil, 0o600)
}
func (db *fsdb) IsPushPaymentRedeemed(ctx context.Context, payID []byte) (bool, error) {
fname := filepath.Join(db.rootRedeemedPushPayments, hex.EncodeToString(payID))
_, err := os.Stat(fname)
return err == nil, nil
}
func (db *fsdb) StorePushPaymentRedeemed(ctx context.Context, payID []byte, insertTime time.Time) error {
fname := filepath.Join(db.rootRedeemedPushPayments, hex.EncodeToString(payID))
content, err := time.Now().MarshalJSON()
if err != nil {
return err
}
return os.WriteFile(fname, content, 0o600)
}
// Expire the old messages from the specified date.
//
// Note: this is currently significantly slow, as it involves listing all
// entries of the dir.
func (db *fsdb) Expire(ctx context.Context, date time.Time) (uint64, error) {
date = date.UTC()
y, m, d := date.Date()
dirs := []string{db.rootMsgs, db.rootSubs, db.rootRedeemedPushPayments}
var count uint64
for i, dirPath := range dirs {
dir, err := os.Open(dirPath)
if err != nil {
return 0, fmt.Errorf("unable to list %s: %v", dirPath, err)
}
const nbListEntries = 1024
for {
files, err := dir.Readdir(nbListEntries)
for _, finfo := range files {
if finfo.IsDir() {
continue
}
fy, fm, fd := finfo.ModTime().Date()
if y == fy && m == fm && d == fd {
err := os.Remove(filepath.Join(dirPath, finfo.Name()))
if err != nil {
return 0, err
}
if i == 0 {
count += 1
}
}
}
if errors.Is(err, io.EOF) {
break
} else if err != nil {
return 0, err
}
}
}
return count, nil
}