/
db.go
248 lines (198 loc) · 5.44 KB
/
db.go
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package main
import (
"database/sql"
_ "github.com/mattn/go-sqlite3" // MIT licensed.
"log"
)
var (
db *sql.DB
)
var dblog *log.Logger
var (
addImg *sql.Stmt
readImgs *sql.Stmt
readImgsDeleted *sql.Stmt
readImgPath *sql.Stmt
delImg *sql.Stmt
delImgHard *sql.Stmt
addAcc *sql.Stmt
delAcc *sql.Stmt
getTkn *sql.Stmt
getAcc *sql.Stmt
rmImgAcc *sql.Stmt
)
func openDB(path string) {
var err error
dblog = log.New(log.Writer(), "[DB] ", 0)
db, err = sql.Open("sqlite3", path)
if err != nil {
dblog.Fatalf("open file %s: %s", path, err)
}
// create tables
// images: name, blob, account (shared secret)
_, err = db.Exec("CREATE TABLE IF NOT EXISTS `images` (`name` TEXT PRIMARY KEY, `blob` BLOB, `account` TEXT, `deleted` BOOLEAN);")
if err != nil {
dblog.Fatalf("Can't prepare statement %s", err)
}
_, err = db.Exec("CREATE TABLE IF NOT EXISTS `tokens` (`account` TEXT PRIMARY KEY, `token` VARCHAR[25] KEY, `viewtoken` VARCHAR[25]);")
if err != nil {
dblog.Fatalf("Can't prepare statement %s", err)
}
// marks image as deleted and sets blob to 0
delImg, err = db.Prepare("UPDATE images SET deleted = true, blob = 0 WHERE name = ? AND account = ?;")
if err != nil {
dblog.Fatalf("Can't prepare statement %s", err)
}
delImgHard, err = db.Prepare("DELETE FROM images WHERE name = ? AND account = ?;")
if err != nil {
dblog.Fatalf("Can't prepare statement %s", err)
}
rmImgAcc, err = db.Prepare("DELETE FROM images WHERE account = ?")
if err != nil {
dblog.Fatalf("Can't prepare statement %s", err)
}
addImg, err = db.Prepare("INSERT OR REPLACE INTO images (name, account, blob, deleted) VALUES (?, ?, ?, false)")
if err != nil {
dblog.Fatalf("Can't prepare statement %s", err)
}
readImgs, err = db.Prepare("SELECT name FROM images WHERE account = ? AND deleted != true")
if err != nil {
dblog.Fatalf("Can't prepare statement %s", err)
}
readImgsDeleted, err = db.Prepare("SELECT name FROM images WHERE account = ? AND deleted = true")
if err != nil {
dblog.Fatalf("Can't prepare statement %s", err)
}
readImgPath, err = db.Prepare("SELECT blob FROM images WHERE name = ? AND account = ?")
if err != nil {
dblog.Fatalf("Can't prepare statement %s", err)
}
addAcc, err = db.Prepare("INSERT OR REPLACE INTO tokens (account, token, viewtoken) VALUES (?, ?, ?)")
if err != nil {
dblog.Fatalf("Can't prepare statement %s", err)
}
delAcc, err = db.Prepare("DELETE FROM tokens WHERE account = ?")
if err != nil {
dblog.Fatalf("Can't prepare statement %s", err)
}
getTkn, err = db.Prepare("SELECT token, viewtoken FROM tokens WHERE account = ?")
if err != nil {
dblog.Fatalf("Can't prepare statement %s", err)
}
getAcc, err = db.Prepare("SELECT account FROM tokens WHERE token = ?")
if err != nil {
dblog.Fatalf("Can't prepare statement %s", err)
}
return
}
func addImage(name, account string, data []byte) error {
_, err := addImg.Exec(name, account, data)
if err != nil {
dblog.Printf("Error adding Image, '%s' len(%d): %s\n", name, len(data), err)
}
return err
}
func readImages(account string) (s []string) {
r, err := readImgs.Query(account)
if err != nil {
dblog.Printf("Error reading Images: %s\n", err)
return
}
defer r.Close()
for r.Next() {
var name string
if err := r.Scan(&name); err != nil {
if err != nil {
dblog.Printf("Error reading rows: %s\n", err)
return
}
}
s = append(s, name)
}
return
}
func readImage(account, name string) (b []byte) {
r, err := readImgPath.Query(name, account)
if err != nil {
dblog.Printf("Error reading image at path '%s': %s\n", name, err)
return
}
defer r.Close()
if r.Next() {
err = r.Scan(&b)
if err != nil {
dblog.Printf("Error scanning image data: %s\n", err)
}
} else {
dblog.Printf("Tried to read nonexistent image %s/%s", account, name)
}
return
}
func haveImage(name, account string) bool {
return len(readImage(name, account)) == 0
}
// sets blob to 0 and marks image as deleted
func deleteImage(name, account string) error {
_, err := delImg.Exec(name, account)
if err != nil {
dblog.Printf("Error deleting image '%s'\n", name)
}
return err
}
// also deletes entry
func removeImage(name, account string) error {
_, err := delImg.Exec(name, account)
if err != nil {
dblog.Printf("Error removing image '%s'\n", name)
}
return err
}
func addAccount(name, token, viewtoken string) error {
_, err := addAcc.Exec(name, token, viewtoken)
if err != nil {
dblog.Printf("Error adding Account, '%s': %s\n", name, err)
}
return err
}
func removeAccount(name string) {
_, err := delAcc.Exec(name)
if err != nil {
dblog.Printf("Error removing account '%s'\n", name)
}
}
func getTokenByName(acc string) (upload, view string) {
r, err := getTkn.Query(acc)
if err != nil {
dblog.Printf("Error reading account '%s's token: %s\n", acc, err)
return
}
defer r.Close()
if r.Next() {
err = r.Scan(&upload, &view)
if err != nil {
dblog.Printf("Error scanning account token: %s\n", err)
}
}
return
}
func getNameByToken(tkn string) (s string) {
r, err := getAcc.Query(tkn)
if err != nil {
dblog.Printf("Error reading account by token '%s': %s\n", tkn, err)
return
}
defer r.Close()
if r.Next() {
err = r.Scan(&s)
if err != nil {
dblog.Printf("Error scanning account name: %s\n", err)
}
}
return
}
func removeAccountImages(acc string) {
_, err := rmImgAcc.Exec(acc)
if err != nil {
log.Printf("Error removing account '%s's images: %s", acc, err)
}
}