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database.go
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database.go
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package main
import (
"database/sql"
"encoding/hex"
"errors"
"os"
"sync"
_ "github.com/mattn/go-sqlite3"
"github.com/nymo-net/nymo"
"github.com/nymo-net/nymo/pb"
)
type database struct {
*sql.DB
storeLock sync.Mutex
}
func (db *database) IgnoreMessage(digest *pb.Digest) {
_, err := db.Exec("INSERT OR IGNORE INTO `message` (`hash`,`cohort`,`deleted`) VALUES(?,?,TRUE)",
digest.Hash, digest.Cohort)
if err != nil {
log.Panic(err)
}
}
func (db *database) ClientHandle(id [8]byte) nymo.PeerHandle {
rowId, err := getPeerRowId(db.DB, id[:])
if err != nil {
log.Panic(err)
}
encoded := hex.EncodeToString(id[:])
log.WithField("id", encoded).Debug("[core] client connected")
web.peer.Store(rowId, encoded)
return &peerHandle{db: db.DB, row: rowId}
}
func (db *database) AddPeer(url string, digest *pb.Digest) {
_, err := db.Exec("REPLACE INTO `peer_link` (`url_hash`,`url`,`cohort`) VALUES (?,?,?)",
digest.Hash, url, digest.Cohort)
if err != nil {
log.Panic(err)
}
}
func (db *database) EnumeratePeers() nymo.PeerEnumerate {
query, err := db.Query("SELECT `url_hash`, `url`, `cohort` FROM `peer_link` ORDER BY `penalize`")
if err != nil {
log.Panic(err)
}
return &peerEnum{
db: db.DB,
rows: query,
}
}
func (db *database) GetUrlByHash(urlHash [8]byte) (url string) {
row := db.QueryRow("SELECT `url` FROM `peer_link` WHERE `url_hash`=?", urlHash[:])
if row.Err() != nil {
log.Panic(row.Err())
}
err := row.Scan(&url)
if err != nil {
log.Panic(err)
}
return
}
func (db *database) GetMessage(hash [32]byte) (msg []byte, pow uint64) {
row := db.QueryRow("SELECT `msg`, `pow` FROM `message` WHERE `hash`=?", hash[:])
if row.Err() != nil {
log.Panic(row.Err())
}
err := row.Scan(&msg, &pow)
if err != nil {
log.Panic(err)
}
return
}
func (db *database) StoreMessage(hash [32]byte, c *pb.MsgContainer, f func() (cohort uint32, err error)) error {
db.storeLock.Lock()
defer db.storeLock.Unlock()
row := db.QueryRow("SELECT COUNT(*) FROM `message` WHERE `hash`=? AND `msg` IS NOT NULL", hash[:])
if row.Err() != nil {
return row.Err()
}
var cnt int
if err := row.Scan(&cnt); err != nil {
return err
}
if cnt != 0 {
return nil
}
cohort, err := f()
if err != nil {
return err
}
_, err = db.Exec("INSERT INTO `message` (`hash`,`cohort`,`msg`,`pow`) VALUES (?,?,@msg,@pow) ON CONFLICT DO UPDATE SET `msg`=@msg,`pow`=@pow",
hash[:], cohort, sql.Named("msg", c.Msg), sql.Named("pow", c.Pow))
return err
}
func (db *database) StoreDecryptedMessage(message *nymo.Message) {
target, err := db.lookupUserId(message.Sender.Bytes())
if err != nil {
log.Panic(err)
}
_, err = db.Exec("INSERT INTO `dec_msg` VALUES (?,FALSE,?,?)",
target, message.Content, message.SendTime.UnixMilli())
if err != nil {
log.Panic(err)
}
go web.recvMessage(target, string(message.Content), message.SendTime)
}
func (db *database) getUserKey() ([]byte, error) {
query, err := db.Query("SELECT `key` FROM `user` WHERE `rowid`=0")
if err != nil {
return nil, err
}
defer query.Close()
if !query.Next() {
return nil, errors.New("user key not found")
}
var ret []byte
return ret, query.Scan(&ret)
}
const dbOptions = "?_foreign_keys=on&_journal_mode=wal"
func openDatabase(path string) (*database, error) {
if _, err := os.Stat(path); os.IsNotExist(err) {
return nil, errors.New("database does not exist")
}
db, err := sql.Open("sqlite3", path+dbOptions)
if err != nil {
return nil, err
}
return &database{DB: db}, nil
}
func createDatabase(path string, der []byte) error {
if _, err := os.Stat(path); !os.IsNotExist(err) {
return errors.New("database already exists")
}
db, err := sql.Open("sqlite3", path+dbOptions)
if err != nil {
return err
}
defer func() {
_ = db.Close()
if err != nil {
_ = os.Remove(path)
}
}()
_, err = db.Exec(schema)
if err == nil {
_, err = db.Exec("INSERT INTO `user` (`rowid`, `key`) VALUES (0, ?);", der)
}
return err
}
// language=sql
const schema = `CREATE TABLE "user"
(
"rowid" INTEGER PRIMARY KEY,
"key" BLOB UNIQUE NOT NULL,
"alias" TEXT
);
CREATE TABLE "peer"
(
"rowid" INTEGER PRIMARY KEY,
"id" BLOB UNIQUE NOT NULL
);
CREATE TABLE "dec_msg"
(
"target" INTEGER NOT NULL
REFERENCES "user" ON UPDATE CASCADE ON DELETE CASCADE,
"self" BOOLEAN NOT NULL,
"content" TEXT NOT NULL,
"send_time" INTEGER
);
CREATE TABLE "message"
(
"rowid" INTEGER PRIMARY KEY,
"hash" BLOB NOT NULL,
"cohort" INTEGER NOT NULL,
"msg" BLOB,
"pow" INTEGER,
"deleted" BOOLEAN DEFAULT FALSE NOT NULL,
UNIQUE ("hash", "cohort")
);
CREATE TABLE "peer_link"
(
"url_hash" BLOB PRIMARY KEY,
"url" TEXT NOT NULL,
"cohort" INTEGER NOT NULL,
"penalize" INTEGER DEFAULT 0 NOT NULL
) WITHOUT ROWID;
CREATE TABLE "known_msg"
(
"peer_id" INTEGER NOT NULL
REFERENCES "peer" ON UPDATE CASCADE ON DELETE CASCADE,
"msg" INTEGER NOT NULL
REFERENCES "message" ON UPDATE CASCADE ON DELETE CASCADE,
PRIMARY KEY ("peer_id", "msg")
) WITHOUT ROWID;
CREATE TABLE "known_peer"
(
"peer_id" INTEGER NOT NULL
REFERENCES "peer" ON UPDATE CASCADE ON DELETE CASCADE,
"url_hash" BLOB NOT NULL,
PRIMARY KEY ("peer_id", "url_hash")
) WITHOUT ROWID;`