feat: complete SyncServer implementation

Full-stack Go monolith with embedded React frontend for orchestrating
rsync-over-SSH file synchronization with Wake-on-LAN support.

Features:
- JWT auth (HS256) with bcrypt password hashing
- CRUD for machines (with WoL config) and sync_pairs
- Ed25519 SSH key generation and known_hosts management
- WoL magic packet sender + TCP-connect waiter with backoff
- Sync engine: rsync subprocess, per-pair job queue, progress parsing
- Homebrew cron parser for scheduled syncs
- SSE stream for live job status (queued/waking_up/running/success/failed)
- React+TS+Vite+Tailwind SPA embedded via embed.FS
- Debian packaging with systemd unit, postinst/prerm/postrm

Tech stack:
- Go 1.22+ (CGO_ENABLED=0, pure SQLite via modernc.org/sqlite)
- chi router for HTTP API
- TypeScript + React 18 + Tailwind CSS frontend
- Cross-compiled to Linux amd64 for Proxmox LXC deployment

Tests: wol (MAC parsing, magic packet), syncengine/queue, scheduler/cron
This commit is contained in:
2026-07-07 15:03:22 -04:00
parent 1a66ac58cd
commit 8e08c73f60
69 changed files with 7949 additions and 152 deletions
+145
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package models
import (
"database/sql"
"time"
)
type Job struct {
ID int64 `db:"id" json:"id"`
SyncPairID int64 `db:"sync_pair_id" json:"sync_pair_id"`
TriggerType string `db:"trigger_type" json:"trigger_type"`
Status string `db:"status" json:"status"`
StartedAt *time.Time `db:"started_at" json:"started_at"`
FinishedAt *time.Time `db:"finished_at" json:"finished_at"`
LogFile *string `db:"log_file" json:"log_file"`
CreatedAt time.Time `db:"created_at" json:"created_at"`
}
type JobRepository struct {
db *sql.DB
}
func NewJobRepository(db *sql.DB) *JobRepository {
return &JobRepository{db: db}
}
func (r *JobRepository) Create(syncPairID int64, triggerType, status string) (int64, error) {
res, err := r.db.Exec(`
INSERT INTO jobs (sync_pair_id, trigger_type, status) VALUES (?, ?, ?)`,
syncPairID, triggerType, status,
)
if err != nil {
return 0, err
}
return res.LastInsertId()
}
func (r *JobRepository) GetByID(id int64) (*Job, error) {
var j Job
var started, finished sql.NullTime
var logFile sql.NullString
err := r.db.QueryRow(`
SELECT id, sync_pair_id, trigger_type, status, started_at, finished_at,
log_file, created_at FROM jobs WHERE id = ?`, id).Scan(
&j.ID, &j.SyncPairID, &j.TriggerType, &j.Status, &started, &finished,
&logFile, &j.CreatedAt)
if err != nil {
return nil, err
}
if started.Valid {
j.StartedAt = &started.Time
}
if finished.Valid {
j.FinishedAt = &finished.Time
}
if logFile.Valid {
j.LogFile = &logFile.String
}
return &j, nil
}
func (r *JobRepository) GetAll(limit, offset int) ([]Job, error) {
rows, err := r.db.Query(`
SELECT id, sync_pair_id, trigger_type, status, started_at, finished_at,
log_file, created_at FROM jobs ORDER BY created_at DESC LIMIT ? OFFSET ?`,
limit, offset)
if err != nil {
return nil, err
}
defer rows.Close()
var jobs []Job
for rows.Next() {
var j Job
var started, finished sql.NullTime
var logFile sql.NullString
if err := rows.Scan(&j.ID, &j.SyncPairID, &j.TriggerType, &j.Status,
&started, &finished, &logFile, &j.CreatedAt); err != nil {
return nil, err
}
if started.Valid {
j.StartedAt = &started.Time
}
if finished.Valid {
j.FinishedAt = &finished.Time
}
if logFile.Valid {
j.LogFile = &logFile.String
}
jobs = append(jobs, j)
}
return jobs, rows.Err()
}
func (r *JobRepository) UpdateStatus(id int64, status string) error {
var query string
var args []interface{}
switch status {
case "running", "waking_up":
query = "UPDATE jobs SET status = ?, started_at = COALESCE(started_at, CURRENT_TIMESTAMP) WHERE id = ?"
args = []interface{}{status, id}
case "success", "failed", "cancelled":
query = "UPDATE jobs SET status = ?, finished_at = CURRENT_TIMESTAMP WHERE id = ?"
args = []interface{}{status, id}
default:
query = "UPDATE jobs SET status = ? WHERE id = ?"
args = []interface{}{status, id}
}
_, err := r.db.Exec(query, args...)
return err
}
func (r *JobRepository) SetLogFile(id int64, path string) error {
_, err := r.db.Exec("UPDATE jobs SET log_file = ? WHERE id = ?", path, id)
return err
}
func (r *JobRepository) GetRunningBySyncPair(syncPairID int64) (*Job, error) {
var j Job
var started sql.NullTime
var logFile sql.NullString
err := r.db.QueryRow(`
SELECT id, sync_pair_id, trigger_type, status, started_at, finished_at,
log_file, created_at FROM jobs
WHERE sync_pair_id = ? AND status IN ('queued','waking_up','running')
ORDER BY created_at DESC LIMIT 1`, syncPairID).Scan(
&j.ID, &j.SyncPairID, &j.TriggerType, &j.Status, &started,
&j.FinishedAt, &logFile, &j.CreatedAt)
if err != nil {
return nil, err
}
if started.Valid {
j.StartedAt = &started.Time
}
if logFile.Valid {
j.LogFile = &logFile.String
}
return &j, nil
}
func (r *JobRepository) Count() (int64, error) {
var n int64
err := r.db.QueryRow("SELECT COUNT(*) FROM jobs").Scan(&n)
return n, err
}
+161
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package models
import (
"database/sql"
"time"
)
type Machine struct {
ID int64 `db:"id" json:"id"`
Name string `db:"name" json:"name"`
Host string `db:"host" json:"host"`
Port int `db:"port" json:"port"`
SSHUser string `db:"ssh_user" json:"ssh_user"`
SSHKeyID *int64 `db:"ssh_key_id" json:"ssh_key_id"`
MACAddress *string `db:"mac_address" json:"mac_address"`
WoLEnabled bool `db:"wol_enabled" json:"wol_enabled"`
BroadcastAddr *string `db:"broadcast_addr" json:"broadcast_addr"`
WakeTimeoutSeconds int `db:"wake_timeout_seconds" json:"wake_timeout_seconds"`
WakeCheckIntervalSeconds int `db:"wake_check_interval_seconds" json:"wake_check_interval_seconds"`
FingerprintConfirmed bool `db:"fingerprint_confirmed" json:"fingerprint_confirmed"`
Status string `db:"status" json:"status"`
LastSeenAt *time.Time `db:"last_seen_at" json:"last_seen_at"`
CreatedAt time.Time `db:"created_at" json:"created_at"`
}
type MachineRepository struct {
db *sql.DB
}
func NewMachineRepository(db *sql.DB) *MachineRepository {
return &MachineRepository{db: db}
}
func (r *MachineRepository) Create(m *Machine) (int64, error) {
res, err := r.db.Exec(`
INSERT INTO machines (name, host, port, ssh_user, ssh_key_id, mac_address,
wol_enabled, broadcast_addr, wake_timeout_seconds, wake_check_interval_seconds,
fingerprint_confirmed, status)
VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)`,
m.Name, m.Host, m.Port, m.SSHUser, m.SSHKeyID, m.MACAddress,
boolToInt(m.WoLEnabled), m.BroadcastAddr, m.WakeTimeoutSeconds,
m.WakeCheckIntervalSeconds, boolToInt(m.FingerprintConfirmed), m.Status,
)
if err != nil {
return 0, err
}
return res.LastInsertId()
}
func (r *MachineRepository) GetAll() ([]Machine, error) {
rows, err := r.db.Query(`
SELECT id, name, host, port, ssh_user, ssh_key_id, mac_address,
wol_enabled, broadcast_addr, wake_timeout_seconds, wake_check_interval_seconds,
fingerprint_confirmed, status, last_seen_at, created_at
FROM machines ORDER BY name`)
if err != nil {
return nil, err
}
defer rows.Close()
var ms []Machine
for rows.Next() {
var m Machine
var mac, bcast sql.NullString
var keyID sql.NullInt64
var lastSeen sql.NullTime
err := rows.Scan(&m.ID, &m.Name, &m.Host, &m.Port, &m.SSHUser, &keyID,
&mac, &m.WoLEnabled, &bcast, &m.WakeTimeoutSeconds,
&m.WakeCheckIntervalSeconds, &m.FingerprintConfirmed,
&m.Status, &lastSeen, &m.CreatedAt)
if err != nil {
return nil, err
}
if keyID.Valid {
v := keyID.Int64
m.SSHKeyID = &v
}
if mac.Valid {
m.MACAddress = &mac.String
}
if bcast.Valid {
m.BroadcastAddr = &bcast.String
}
if lastSeen.Valid {
m.LastSeenAt = &lastSeen.Time
}
ms = append(ms, m)
}
return ms, rows.Err()
}
func (r *MachineRepository) GetByID(id int64) (*Machine, error) {
var m Machine
var mac, bcast sql.NullString
var keyID sql.NullInt64
var lastSeen sql.NullTime
err := r.db.QueryRow(`
SELECT id, name, host, port, ssh_user, ssh_key_id, mac_address,
wol_enabled, broadcast_addr, wake_timeout_seconds, wake_check_interval_seconds,
fingerprint_confirmed, status, last_seen_at, created_at
FROM machines WHERE id = ?`, id).Scan(
&m.ID, &m.Name, &m.Host, &m.Port, &m.SSHUser, &keyID,
&mac, &m.WoLEnabled, &bcast, &m.WakeTimeoutSeconds,
&m.WakeCheckIntervalSeconds, &m.FingerprintConfirmed,
&m.Status, &lastSeen, &m.CreatedAt)
if err != nil {
return nil, err
}
if keyID.Valid {
v := keyID.Int64
m.SSHKeyID = &v
}
if mac.Valid {
m.MACAddress = &mac.String
}
if bcast.Valid {
m.BroadcastAddr = &bcast.String
}
if lastSeen.Valid {
m.LastSeenAt = &lastSeen.Time
}
return &m, nil
}
func (r *MachineRepository) Update(m *Machine) error {
_, err := r.db.Exec(`
UPDATE machines SET name=?, host=?, port=?, ssh_user=?, ssh_key_id=?,
mac_address=?, wol_enabled=?, broadcast_addr=?, wake_timeout_seconds=?,
wake_check_interval_seconds=?, fingerprint_confirmed=?, status=?, last_seen_at=?
WHERE id=?`,
m.Name, m.Host, m.Port, m.SSHUser, m.SSHKeyID, m.MACAddress,
boolToInt(m.WoLEnabled), m.BroadcastAddr, m.WakeTimeoutSeconds,
m.WakeCheckIntervalSeconds, boolToInt(m.FingerprintConfirmed),
m.Status, m.LastSeenAt, m.ID,
)
return err
}
func (r *MachineRepository) Delete(id int64) error {
_, err := r.db.Exec("DELETE FROM machines WHERE id = ?", id)
return err
}
func (r *MachineRepository) UpdateStatus(id int64, status string) error {
_, err := r.db.Exec(
"UPDATE machines SET status = ?, last_seen_at = CURRENT_TIMESTAMP WHERE id = ?",
status, id,
)
return err
}
func boolToInt(b bool) int {
if b {
return 1
}
return 0
}
func intToBool(i int) bool {
return i != 0
}
+124
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package models
import (
"database/sql"
"time"
)
type Schedule struct {
ID int64 `db:"id" json:"id"`
SyncPairID int64 `db:"sync_pair_id" json:"sync_pair_id"`
CronExpr string `db:"cron_expr" json:"cron_expr"`
NextRunAt *time.Time `db:"next_run_at" json:"next_run_at"`
Enabled bool `db:"enabled" json:"enabled"`
CreatedAt time.Time `db:"created_at" json:"created_at"`
}
type ScheduleRepository struct {
db *sql.DB
}
func NewScheduleRepository(db *sql.DB) *ScheduleRepository {
return &ScheduleRepository{db: db}
}
func (r *ScheduleRepository) Create(s *Schedule) (int64, error) {
res, err := r.db.Exec(`
INSERT INTO schedules (sync_pair_id, cron_expr, next_run_at, enabled)
VALUES (?, ?, ?, ?)`,
s.SyncPairID, s.CronExpr, s.NextRunAt, boolToInt(s.Enabled),
)
if err != nil {
return 0, err
}
return res.LastInsertId()
}
func (r *ScheduleRepository) GetAll() ([]Schedule, error) {
rows, err := r.db.Query(`
SELECT id, sync_pair_id, cron_expr, next_run_at, enabled, created_at
FROM schedules ORDER BY id`)
if err != nil {
return nil, err
}
defer rows.Close()
var schedules []Schedule
for rows.Next() {
var s Schedule
var nextRun sql.NullTime
if err := rows.Scan(&s.ID, &s.SyncPairID, &s.CronExpr, &nextRun,
&s.Enabled, &s.CreatedAt); err != nil {
return nil, err
}
if nextRun.Valid {
s.NextRunAt = &nextRun.Time
}
s.Enabled = intToBool(intToInt(s.Enabled))
schedules = append(schedules, s)
}
return schedules, rows.Err()
}
func (r *ScheduleRepository) GetByID(id int64) (*Schedule, error) {
var s Schedule
var nextRun sql.NullTime
err := r.db.QueryRow(`
SELECT id, sync_pair_id, cron_expr, next_run_at, enabled, created_at
FROM schedules WHERE id = ?`, id).Scan(
&s.ID, &s.SyncPairID, &s.CronExpr, &nextRun, &s.Enabled, &s.CreatedAt)
if err != nil {
return nil, err
}
if nextRun.Valid {
s.NextRunAt = &nextRun.Time
}
s.Enabled = intToBool(intToInt(s.Enabled))
return &s, nil
}
func (r *ScheduleRepository) Update(s *Schedule) error {
_, err := r.db.Exec(`
UPDATE schedules SET sync_pair_id=?, cron_expr=?, next_run_at=?, enabled=?
WHERE id=?`,
s.SyncPairID, s.CronExpr, s.NextRunAt, boolToInt(s.Enabled), s.ID,
)
return err
}
func (r *ScheduleRepository) Delete(id int64) error {
_, err := r.db.Exec("DELETE FROM schedules WHERE id = ?", id)
return err
}
func (r *ScheduleRepository) GetEnabledDue(before time.Time) ([]Schedule, error) {
rows, err := r.db.Query(`
SELECT id, sync_pair_id, cron_expr, next_run_at, enabled, created_at
FROM schedules WHERE enabled = 1 AND next_run_at IS NOT NULL AND next_run_at <= ?
ORDER BY next_run_at`, before)
if err != nil {
return nil, err
}
defer rows.Close()
var schedules []Schedule
for rows.Next() {
var s Schedule
var nextRun sql.NullTime
if err := rows.Scan(&s.ID, &s.SyncPairID, &s.CronExpr, &nextRun,
&s.Enabled, &s.CreatedAt); err != nil {
return nil, err
}
if nextRun.Valid {
s.NextRunAt = &nextRun.Time
}
s.Enabled = true
schedules = append(schedules, s)
}
return schedules, rows.Err()
}
func (r *ScheduleRepository) UpdateNextRun(id int64, nextRun time.Time) error {
_, err := r.db.Exec("UPDATE schedules SET next_run_at = ? WHERE id = ?", nextRun, id)
return err
}
+80
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package models
import (
"database/sql"
"time"
)
type SSHKey struct {
ID int64 `db:"id" json:"id"`
Label string `db:"label" json:"label"`
PrivateKeyPath string `db:"private_key_path" json:"-"`
PublicKey string `db:"public_key" json:"public_key"`
CreatedAt time.Time `db:"created_at" json:"created_at"`
}
type SSHKeyRepository struct {
db *sql.DB
}
func NewSSHKeyRepository(db *sql.DB) *SSHKeyRepository {
return &SSHKeyRepository{db: db}
}
func (r *SSHKeyRepository) Create(label, privPath, pubKey string) (int64, error) {
res, err := r.db.Exec(
"INSERT INTO ssh_keys (label, private_key_path, public_key) VALUES (?, ?, ?)",
label, privPath, pubKey,
)
if err != nil {
return 0, err
}
return res.LastInsertId()
}
func (r *SSHKeyRepository) GetByID(id int64) (*SSHKey, error) {
var k SSHKey
err := r.db.QueryRow(
"SELECT id, label, private_key_path, public_key, created_at FROM ssh_keys WHERE id = ?",
id,
).Scan(&k.ID, &k.Label, &k.PrivateKeyPath, &k.PublicKey, &k.CreatedAt)
if err != nil {
return nil, err
}
return &k, nil
}
func (r *SSHKeyRepository) GetAll() ([]SSHKey, error) {
rows, err := r.db.Query(
"SELECT id, label, private_key_path, public_key, created_at FROM ssh_keys ORDER BY label")
if err != nil {
return nil, err
}
defer rows.Close()
var keys []SSHKey
for rows.Next() {
var k SSHKey
if err := rows.Scan(&k.ID, &k.Label, &k.PrivateKeyPath, &k.PublicKey, &k.CreatedAt); err != nil {
return nil, err
}
keys = append(keys, k)
}
return keys, rows.Err()
}
func (r *SSHKeyRepository) Delete(id int64) error {
_, err := r.db.Exec("DELETE FROM ssh_keys WHERE id = ?", id)
return err
}
func (r *SSHKeyRepository) GetServerKey() (*SSHKey, error) {
var k SSHKey
err := r.db.QueryRow(
"SELECT id, label, private_key_path, public_key, created_at FROM ssh_keys WHERE label = 'server' LIMIT 1",
).Scan(&k.ID, &k.Label, &k.PrivateKeyPath, &k.PublicKey, &k.CreatedAt)
if err != nil {
return nil, err
}
return &k, nil
}
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package models
import (
"database/sql"
"strings"
"time"
)
type SyncPair struct {
ID int64 `db:"id" json:"id"`
Name string `db:"name" json:"name"`
SourceMachineID *int64 `db:"source_machine_id" json:"source_machine_id"`
SourcePath string `db:"source_path" json:"source_path"`
DestMachineID *int64 `db:"dest_machine_id" json:"dest_machine_id"`
DestPath string `db:"dest_path" json:"dest_path"`
Direction string `db:"direction" json:"direction"`
RsyncFlags string `db:"rsync_flags" json:"rsync_flags"`
ExcludePatterns string `db:"exclude_patterns" json:"exclude_patterns"`
Enabled bool `db:"enabled" json:"enabled"`
CreatedAt time.Time `db:"created_at" json:"created_at"`
}
type SyncPairRepository struct {
db *sql.DB
}
func NewSyncPairRepository(db *sql.DB) *SyncPairRepository {
return &SyncPairRepository{db: db}
}
func (r *SyncPairRepository) Create(sp *SyncPair) (int64, error) {
res, err := r.db.Exec(`
INSERT INTO sync_pairs (name, source_machine_id, source_path, dest_machine_id,
dest_path, direction, rsync_flags, exclude_patterns, enabled)
VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)`,
sp.Name, sp.SourceMachineID, sp.SourcePath, sp.DestMachineID,
sp.DestPath, sp.Direction, sp.RsyncFlags, sp.ExcludePatterns, boolToInt(sp.Enabled),
)
if err != nil {
return 0, err
}
return res.LastInsertId()
}
func (r *SyncPairRepository) GetAll() ([]SyncPair, error) {
rows, err := r.db.Query(`
SELECT id, name, source_machine_id, source_path, dest_machine_id, dest_path,
direction, rsync_flags, exclude_patterns, enabled, created_at
FROM sync_pairs ORDER BY name`)
if err != nil {
return nil, err
}
defer rows.Close()
var pairs []SyncPair
for rows.Next() {
var p SyncPair
var srcID, dstID sql.NullInt64
if err := rows.Scan(&p.ID, &p.Name, &srcID, &p.SourcePath, &dstID,
&p.DestPath, &p.Direction, &p.RsyncFlags, &p.ExcludePatterns,
&p.Enabled, &p.CreatedAt); err != nil {
return nil, err
}
if srcID.Valid {
v := srcID.Int64
p.SourceMachineID = &v
}
if dstID.Valid {
v := dstID.Int64
p.DestMachineID = &v
}
p.Enabled = intToBool(intToInt(p.Enabled))
pairs = append(pairs, p)
}
return pairs, rows.Err()
}
func intToInt(v interface{}) int {
switch x := v.(type) {
case int:
return x
case int64:
return int(x)
case bool:
if x {
return 1
}
return 0
default:
return 0
}
}
func (r *SyncPairRepository) GetByID(id int64) (*SyncPair, error) {
var p SyncPair
var srcID, dstID sql.NullInt64
err := r.db.QueryRow(`
SELECT id, name, source_machine_id, source_path, dest_machine_id, dest_path,
direction, rsync_flags, exclude_patterns, enabled, created_at
FROM sync_pairs WHERE id = ?`, id).Scan(
&p.ID, &p.Name, &srcID, &p.SourcePath, &dstID,
&p.DestPath, &p.Direction, &p.RsyncFlags, &p.ExcludePatterns,
&p.Enabled, &p.CreatedAt)
if err != nil {
return nil, err
}
if srcID.Valid {
v := srcID.Int64
p.SourceMachineID = &v
}
if dstID.Valid {
v := dstID.Int64
p.DestMachineID = &v
}
p.Enabled = intToBool(intToInt(p.Enabled))
return &p, nil
}
func (r *SyncPairRepository) Update(sp *SyncPair) error {
_, err := r.db.Exec(`
UPDATE sync_pairs SET name=?, source_machine_id=?, source_path=?, dest_machine_id=?,
dest_path=?, direction=?, rsync_flags=?, exclude_patterns=?, enabled=?
WHERE id=?`,
sp.Name, sp.SourceMachineID, sp.SourcePath, sp.DestMachineID,
sp.DestPath, sp.Direction, sp.RsyncFlags, sp.ExcludePatterns,
boolToInt(sp.Enabled), sp.ID,
)
return err
}
func (r *SyncPairRepository) Delete(id int64) error {
_, err := r.db.Exec("DELETE FROM sync_pairs WHERE id = ?", id)
return err
}
func (r *SyncPairRepository) GetEnabled() ([]SyncPair, error) {
rows, err := r.db.Query(`
SELECT id, name, source_machine_id, source_path, dest_machine_id, dest_path,
direction, rsync_flags, exclude_patterns, enabled, created_at
FROM sync_pairs WHERE enabled = 1`)
if err != nil {
return nil, err
}
defer rows.Close()
var pairs []SyncPair
for rows.Next() {
var p SyncPair
var srcID, dstID sql.NullInt64
if err := rows.Scan(&p.ID, &p.Name, &srcID, &p.SourcePath, &dstID,
&p.DestPath, &p.Direction, &p.RsyncFlags, &p.ExcludePatterns,
&p.Enabled, &p.CreatedAt); err != nil {
return nil, err
}
if srcID.Valid {
v := srcID.Int64
p.SourceMachineID = &v
}
if dstID.Valid {
v := dstID.Int64
p.DestMachineID = &v
}
p.Enabled = true
pairs = append(pairs, p)
}
return pairs, rows.Err()
}
func (sp *SyncPair) ExcludePatternsList() []string {
if sp.ExcludePatterns == "" {
return nil
}
var patterns []string
for _, p := range strings.Split(sp.ExcludePatterns, "\n") {
p = strings.TrimSpace(p)
if p != "" {
patterns = append(patterns, p)
}
}
return patterns
}
+66
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package models
import (
"database/sql"
"time"
)
type User struct {
ID int64 `db:"id" json:"id"`
Username string `db:"username" json:"username"`
PasswordHash string `db:"password_hash" json:"-"`
Role string `db:"role" json:"role"`
CreatedAt time.Time `db:"created_at" json:"created_at"`
}
type UserRepository struct {
db *sql.DB
}
func NewUserRepository(db *sql.DB) *UserRepository {
return &UserRepository{db: db}
}
func (r *UserRepository) Create(username, passwordHash, role string) (int64, error) {
res, err := r.db.Exec(
"INSERT INTO users (username, password_hash, role) VALUES (?, ?, ?)",
username, passwordHash, role,
)
if err != nil {
return 0, err
}
return res.LastInsertId()
}
func (r *UserRepository) GetByUsername(username string) (*User, error) {
var u User
err := r.db.QueryRow(
"SELECT id, username, password_hash, role, created_at FROM users WHERE username = ?",
username,
).Scan(&u.ID, &u.Username, &u.PasswordHash, &u.Role, &u.CreatedAt)
if err != nil {
return nil, err
}
return &u, nil
}
func (r *UserRepository) Exists() (bool, error) {
var n int
err := r.db.QueryRow("SELECT COUNT(*) FROM users").Scan(&n)
if err != nil {
return false, err
}
return n > 0, nil
}
func (r *UserRepository) GetByID(id int64) (*User, error) {
var u User
err := r.db.QueryRow(
"SELECT id, username, password_hash, role, created_at FROM users WHERE id = ?",
id,
).Scan(&u.ID, &u.Username, &u.PasswordHash, &u.Role, &u.CreatedAt)
if err != nil {
return nil, err
}
return &u, nil
}