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|
package storage
import (
"database/sql"
"fmt"
"log"
"time"
"go.rctt.net/solec/core"
)
type Database struct {
*sql.DB
}
const initSql = `
CREATE TABLE IF NOT EXISTS messages
(id INTEGER NOT NULL PRIMARY KEY, source STRING, target STRING, timestamp INT, content STRING);
`
func InitDb(path string) (*Database, error) {
db, err := sql.Open("sqlite3", path)
if err != nil {
return nil, err
}
_, err = db.Exec(initSql)
return &Database{db}, nil
}
func (db *Database) Write(msg core.Message) (err error) {
fmt.Println(msg.Timestamp)
_, err = db.Exec(
"INSERT INTO messages (source, target, timestamp, content) VALUES (?, ?, ?, ?);",
msg.Source, msg.Target, msg.Timestamp.Unix(), msg.Content,
)
return err
}
func (db *Database) Read(channel string, since time.Time, num int, offset int) (history []core.Message, err error) {
rows, err := db.Query(
`SELECT source, target, timestamp, content FROM messages WHERE target = ? AND timestamp > ? LIMIT ? OFFSET ?`,
channel, since.Unix(), num, offset,
)
defer func() {
if rows == nil {
return
}
if err := rows.Close(); err != nil {
log.Println("cannot close database row:", err)
}
}()
if err != nil {
return history, err
}
for rows.Next() {
var msg core.Message
var timestamp int64
if err := rows.Scan(&msg.Source, &msg.Target, ×tamp, &msg.Content); err != nil {
return history, err
}
msg.Timestamp = time.Unix(timestamp, 0)
history = append(history, msg)
}
return history, nil
}
|
