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db.go
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db.go
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package main
import (
"database/sql"
"path/filepath"
)
type BadgerDb struct {
db *sql.DB
}
/*
* Construct a database
*/
func NewSqliteDB(opts *BadgerOpts) (*sql.DB, error) {
dbPath := filepath.Join(opts.to, ".badger_metadata.sqlite")
return sql.Open("sqlite3", dbPath)
}
func (conn *BadgerDb) Close() error {
return conn.db.Close()
}
func (conn *BadgerDb) CreateTables() error {
tx, err := conn.db.Begin()
defer tx.Rollback()
if err != nil {
return err
}
_, err = tx.Exec(`CREATE TABLE IF NOT EXISTS mediaData (
src TEXT NOT NULL,
dst TEXT NOT NULL,
hash TEXT NOT NULL,
id INTEEGR NOT NULL,
clusterId INTEGER NOT NULL,
blur INTEGER,
mediaType TEXT NOT NULL,
iso TEXT,
aperture TEXT,
shutterSpeed TEXT,
mtime TEXT
)`)
if err != nil {
return err
}
tx.Commit()
return nil
}
func (conn *BadgerDb) InsertMedia(media *Media) error {
tx, err := conn.db.Begin()
if err != nil {
return err
}
defer tx.Rollback()
iso := ""
aperture := ""
shutterSpeed := ""
info, err := media.GetInformation()
if err != nil {
return err
}
if info != nil {
iso = info.Iso
aperture = info.Aperture
shutterSpeed = info.ShutterSpeed
}
_, err = tx.Exec(`
INSERT INTO mediaData (
src,
dst,
hash,
id,
clusterId,
blur,
mediaType,
iso,
aperture,
shutterSpeed
) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
`,
media.source,
media.GetDestinationPath(),
media.hash,
media.id,
media.clusterId,
media.blur,
media.GetType(),
iso,
aperture,
shutterSpeed,
)
if err != nil {
return err
}
err = tx.Commit()
if err != nil {
return err
}
return nil
}
type GetMediaRow struct {
src string
dst string
hash string
blur int
}
/*
* Get media by source
*/
func (conn *BadgerDb) GetMedia(media *Media) (*GetMediaRow, error) {
tx, err := conn.db.Begin()
store := GetMediaRow{}
if err != nil {
return &GetMediaRow{}, err
}
defer tx.Rollback()
result := conn.db.QueryRow(`SELECT src, dst, hash, blur FROM mediaData WHERE src = ?`, media.source)
switch err := result.Scan(&store.src, &store.dst, &store.hash, &store.blur); err {
case sql.ErrNoRows:
return &store, nil
case nil:
return &store, nil
}
return &store, nil
}