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package sqlite
import (
"context"
"database/sql"
"fmt"
"log"
"os"
_ "modernc.org/sqlite"
"uvok.de/go/training_fellow/registration"
)
type sqliteRepository struct {
fileName string
context context.Context
}
func NewRepository(fileName string, context context.Context) *sqliteRepository {
repo := sqliteRepository{fileName: fileName, context: context}
return &repo
}
func (repo *sqliteRepository) SaveRegistration(registration *registration.Registration) error {
db, err := repo.checkInit()
if err != nil {
return err
}
defer db.Close()
_, err = db.ExecContext(
repo.context,
`INSERT INTO registrations
(reg_id, first_name, last_name, email, company, training_code, date, privacy_policy_accepted, confirmed)
VALUES (?,?,?,?,?,?,?,?,?)`,
registration.RegId,
registration.FirstName,
registration.LastName,
registration.Email,
registration.Company,
registration.TrainingCode,
registration.Date,
registration.PrivacyPolicyAccepted,
registration.Confirmed)
return err
}
func rowToRegistration(scanner interface{ Scan(dest ...any) error }) (*registration.Registration, error) {
var reg registration.Registration
err := scanner.Scan(®.RegId, ®.FirstName, ®.LastName, ®.Email, ®.Company, ®.TrainingCode, ®.Date, ®.PrivacyPolicyAccepted)
if err != nil {
return nil, err
}
return ®, nil
}
func (repo *sqliteRepository) GetUnconfirmedRegistrations() ([]*registration.Registration, error) {
db, err := repo.checkInit()
if err != nil {
return nil, err
}
res, err := db.QueryContext(
repo.context,
`SELECT reg_id, first_name, last_name, email, company, training_code, date, privacy_policy_accepted
FROM registrations
WHERE confirmed = 0
`)
if err != nil {
return nil, err
}
defer res.Close()
regArray := make([]*registration.Registration, 0)
for res.Next() {
reg, err := rowToRegistration(res)
if err != nil {
log.Printf("Error scanning: %v", err)
continue
}
regArray = append(regArray, reg)
}
return regArray, nil
}
func (repo *sqliteRepository) ConfirmRegistration(registrationId string) (*registration.Registration, error) {
db, err := repo.checkInit()
if err != nil {
return nil, err
}
defer db.Close()
transaction, err := db.BeginTx(repo.context, nil)
if err != nil {
return nil, err
}
defer transaction.Rollback()
updateRes, err := transaction.Exec(
"UPDATE registrations SET confirmed=1 WHERE reg_id=? AND confirmed=0",
registrationId)
if err != nil {
return nil, err
}
count, err := updateRes.RowsAffected()
switch {
case err != nil:
return nil, err
case count == 0:
return nil, sql.ErrNoRows
case count > 1:
newError := fmt.Errorf("more than one result for registration ID %v", registrationId)
return nil, newError
}
transaction.Commit()
queryRes := db.QueryRowContext(
repo.context,
`SELECT reg_id, first_name, last_name, email, company, training_code, date, privacy_policy_accepted
FROM registrations
WHERE reg_id=?
`,
registrationId)
reg, err := rowToRegistration(queryRes)
// Not included in result set
reg.Confirmed = true
switch {
// case err == sql.ErrNoRows:
// return nil, err
case err != nil:
return nil, err
default:
return reg, nil
}
}
func (repo *sqliteRepository) checkInit() (*sql.DB, error) {
db, err := sql.Open("sqlite", repo.fileName)
if err != nil {
return nil, err
}
err = db.PingContext(repo.context)
if err != nil {
return nil, err
}
return db, nil
}
func (repo *sqliteRepository) Migrate() error {
db, err := repo.checkInit()
if err != nil {
return err
}
var schema_version int64
err = db.QueryRow("PRAGMA user_version").Scan(&schema_version)
if err != nil {
return err
}
// Initial / fresh table
if schema_version == 0 {
var sql []byte
sql, err = os.ReadFile("./0001_Create_Initial_Tables.sql")
if err != nil {
return err
}
sqlString := string(sql)
_, err = db.Exec(sqlString)
}
return err
}
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