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package svc // import "github.com/getwtxt/getwtxt/svc"
import (
"database/sql"
"log"
"net"
"strings"
"time"
"github.com/getwtxt/registry"
"github.com/syndtr/goleveldb/leveldb"
)
type dbase interface {
push() error
pull()
}
type dbLevel struct {
db *leveldb.DB
}
type dbSqlite struct {
db *sql.DB
}
type dbPostgres struct {
db *sql.DB
}
// Pull DB data into cache, if available.
func initDatabase() {
var db dbase
var err error
confObj.Mu.RLock()
switch confObj.DBType {
case "leveldb":
var lvl *leveldb.DB
lvl, err = leveldb.OpenFile(confObj.DBPath, nil)
db = &dbLevel{db: lvl}
case "sqlite":
var lite *sql.DB
db = &dbSqlite{db: lite}
case "postgres":
var pg *sql.DB
db = &dbPostgres{db: pg}
}
confObj.Mu.RUnlock()
if err != nil {
log.Fatalf("%v\n", err.Error())
}
dbChan <- db
pullDB()
}
func dbTimer() bool {
confObj.Mu.RLock()
answer := time.Since(confObj.LastPush) > confObj.DBInterval
confObj.Mu.RUnlock()
return answer
}
// Pushes the registry's cache data to a local
// database for safe keeping.
func pushDB() error {
db := <-dbChan
err := db.push()
dbChan <- db
return err
}
func pullDB() {
db := <-dbChan
db.pull()
dbChan <- db
}
func (lvl dbLevel) push() error {
twtxtCache.Mu.RLock()
var dbBasket = &leveldb.Batch{}
for k, v := range twtxtCache.Users {
dbBasket.Put([]byte(k+"*Nick"), []byte(v.Nick))
dbBasket.Put([]byte(k+"*URL"), []byte(v.URL))
dbBasket.Put([]byte(k+"*IP"), []byte(v.IP.String()))
dbBasket.Put([]byte(k+"*Date"), []byte(v.Date))
for i, e := range v.Status {
rfc := i.Format(time.RFC3339)
dbBasket.Put([]byte(k+"*Status*"+rfc), []byte(e))
}
}
twtxtCache.Mu.RUnlock()
remoteRegistries.Mu.RLock()
for k, v := range remoteRegistries.List {
dbBasket.Put([]byte("remote*"+string(k)), []byte(v))
}
remoteRegistries.Mu.RUnlock()
if err := lvl.db.Write(dbBasket, nil); err != nil {
return err
}
confObj.Mu.Lock()
confObj.LastPush = time.Now()
confObj.Mu.Unlock()
return nil
}
func (lvl dbLevel) pull() {
iter := lvl.db.NewIterator(nil, nil)
for iter.Next() {
key := string(iter.Key())
val := string(iter.Value())
split := strings.Split(key, "*")
urls := split[0]
field := split[1]
if urls == "remote" {
remoteRegistries.Mu.Lock()
remoteRegistries.List = append(remoteRegistries.List, val)
remoteRegistries.Mu.Unlock()
continue
}
data := registry.NewUser()
twtxtCache.Mu.RLock()
if _, ok := twtxtCache.Users[urls]; ok {
data = twtxtCache.Users[urls]
}
twtxtCache.Mu.RUnlock()
switch field {
case "IP":
data.IP = net.ParseIP(val)
case "Nick":
data.Nick = val
case "URL":
data.URL = val
case "Date":
data.Date = val
case "Status":
thetime, err := time.Parse(time.RFC3339, split[2])
if err != nil {
log.Printf("%v\n", err.Error())
}
data.Status[thetime] = val
}
twtxtCache.Mu.Lock()
twtxtCache.Users[urls] = data
twtxtCache.Mu.Unlock()
}
remoteRegistries.Mu.Lock()
remoteRegistries.List = dedupe(remoteRegistries.List)
remoteRegistries.Mu.Unlock()
iter.Release()
err := iter.Error()
if err != nil {
log.Printf("Error while pulling DB into registry cache: %v\n", err.Error())
}
}
func (lite dbSqlite) push() error {
return nil
}
func (lite dbSqlite) pull() {
}
func (pg dbPostgres) push() error {
return nil
}
func (pg dbPostgres) pull() {
}
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