wi/storage/storage.go

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/**
* @file storage.go
* @author Mikhail Klementyev jollheef<AT>riseup.net
* @license GNU GPLv3
* @date July, 2016
*/
package storage
import (
"database/sql"
_ "github.com/mattn/go-sqlite3"
)
func OpenDB(path string) (db *sql.DB, err error) {
db, err = sql.Open("sqlite3", path)
if err != nil {
return
}
_, err = db.Exec("CREATE TABLE IF NOT EXISTS `links` " +
"( `id` INTEGER PRIMARY KEY AUTOINCREMENT, `url` TEXT );")
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if err != nil {
return
}
_, err = db.Exec("CREATE TABLE IF NOT EXISTS `history` " +
"( `id` INTEGER PRIMARY KEY AUTOINCREMENT, `url` TEXT );")
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return
}
func AddLink(db *sql.DB, url string) (linkNo int64, err error) {
stmt, err := db.Prepare("INSERT INTO `links` (`url`) VALUES ($1);")
if err != nil {
return
}
defer stmt.Close()
r, err := stmt.Exec(url)
if err != nil {
return
}
linkNo, err = r.LastInsertId()
return
}
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func GetLink(db *sql.DB, linkID int64) (url string, err error) {
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stmt, err := db.Prepare("SELECT `url` FROM `links` WHERE id=$1;")
if err != nil {
return
}
defer stmt.Close()
err = stmt.QueryRow(linkID).Scan(&url)
return
}
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func GetLinkID(db *sql.DB, url string) (linkID int64, err error) {
stmt, err := db.Prepare("SELECT `id` FROM `links` WHERE url=$1;")
if err != nil {
return
}
defer stmt.Close()
err = stmt.QueryRow(url).Scan(&linkID)
return
}
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func AddHistoryURL(db *sql.DB, url string) (err error) {
stmt, err := db.Prepare("INSERT INTO `history` (`url`) VALUES ($1);")
if err != nil {
return
}
defer stmt.Close()
_, err = stmt.Exec(url)
return
}
type HistoryItem struct {
ID int64
URL string
}
func GetHistory(db *sql.DB) (history []HistoryItem, err error) {
rows, err := db.Query("SELECT `id`, `url` FROM `history`;")
if err != nil {
return
}
defer rows.Close()
for rows.Next() {
var h HistoryItem
err = rows.Scan(&h.ID, &h.URL)
if err != nil {
return
}
history = append(history, h)
}
return
}
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func GetHistoryUrl(db *sql.DB, historyID int64) (url string, err error) {
stmt, err := db.Prepare("SELECT `url` FROM `history` WHERE id=$1;")
if err != nil {
return
}
defer stmt.Close()
err = stmt.QueryRow(historyID).Scan(&url)
return
}