Add node mode with SSH auto-install and Remnawave-style manual deploy.

Co-authored-by: Cursor <cursoragent@cursor.com>

internal/db/nodes.go

@@ -0,0 +1,138 @@
+package db
+
+import (
+	"database/sql"
+	"fmt"
+	"strings"
+	"time"
+
+	"github.com/google/uuid"
+
+	"github.com/orohi/vpn-panel/internal/models"
+)
+
+func scanNode(scanner interface {
+	Scan(dest ...any) error
+}) (*models.Node, error) {
+	n := &models.Node{}
+	var lastSeen sql.NullTime
+	var status string
+	err := scanner.Scan(
+		&n.ID, &n.Name, &n.Host, &n.SSHPort, &n.SSHUser, &n.SSHAuthType, &n.SSHSecretEnc,
+		&n.NodePort, &n.SecretKey, &status, &n.InstallMode, &n.LastError, &n.InstallLog,
+		&n.AgentVersion, &lastSeen, &n.CreatedAt, &n.UpdatedAt,
+	)
+	if err != nil {
+		return nil, err
+	}
+	n.Status = models.NodeStatus(status)
+	if lastSeen.Valid {
+		t := lastSeen.Time
+		n.LastSeenAt = &t
+	}
+	return n, nil
+}
+
+const nodeColumns = `
+id, name, host, ssh_port, ssh_user, ssh_auth_type, ssh_secret_enc,
+node_port, secret_key, status, install_mode, last_error, install_log,
+agent_version, last_seen_at, created_at, updated_at`
+
+func CreateNode(db *sql.DB, n *models.Node) error {
+	if n.ID == uuid.Nil {
+		n.ID = uuid.New()
+	}
+	now := time.Now().UTC()
+	n.CreatedAt = now
+	n.UpdatedAt = now
+	if n.Status == "" {
+		n.Status = models.NodeStatusPending
+	}
+	_, err := db.Exec(`
+INSERT INTO nodes (
+  id, name, host, ssh_port, ssh_user, ssh_auth_type, ssh_secret_enc,
+  node_port, secret_key, status, install_mode, last_error, install_log,
+  agent_version, last_seen_at, created_at, updated_at
+) VALUES (
+  $1,$2,$3,$4,$5,$6,$7,$8,$9,$10,$11,$12,$13,$14,$15,$16,$17
+)`,
+		n.ID, n.Name, n.Host, n.SSHPort, n.SSHUser, n.SSHAuthType, n.SSHSecretEnc,
+		n.NodePort, n.SecretKey, string(n.Status), n.InstallMode, n.LastError, n.InstallLog,
+		n.AgentVersion, n.LastSeenAt, n.CreatedAt, n.UpdatedAt,
+	)
+	return err
+}
+
+func GetNode(db *sql.DB, id uuid.UUID) (*models.Node, error) {
+	row := db.QueryRow(`SELECT `+nodeColumns+` FROM nodes WHERE id = $1`, id)
+	n, err := scanNode(row)
+	if err == sql.ErrNoRows {
+		return nil, nil
+	}
+	return n, err
+}
+
+func ListNodes(db *sql.DB) ([]models.Node, error) {
+	rows, err := db.Query(`SELECT ` + nodeColumns + ` FROM nodes ORDER BY created_at DESC`)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	var list []models.Node
+	for rows.Next() {
+		n, err := scanNode(rows)
+		if err != nil {
+			return nil, err
+		}
+		list = append(list, *n)
+	}
+	return list, rows.Err()
+}
+
+func UpdateNodeStatus(db *sql.DB, id uuid.UUID, status models.NodeStatus, lastError string) error {
+	_, err := db.Exec(`
+UPDATE nodes
+SET status = $2, last_error = $3, updated_at = NOW()
+WHERE id = $1`, id, string(status), lastError)
+	return err
+}
+
+func ClearNodeInstallLog(db *sql.DB, id uuid.UUID) error {
+	_, err := db.Exec(`UPDATE nodes SET install_log = '', updated_at = NOW() WHERE id = $1`, id)
+	return err
+}
+
+func AppendNodeInstallLog(db *sql.DB, id uuid.UUID, chunk string) error {
+	_, err := db.Exec(`
+UPDATE nodes
+SET install_log = CASE
+  WHEN install_log = '' OR install_log IS NULL THEN $2
+  ELSE install_log || E'\n' || $2
+END, updated_at = NOW()
+WHERE id = $1`, id, strings.TrimRight(chunk, "\n"))
+	return err
+}
+
+func MarkNodeSeen(db *sql.DB, id uuid.UUID, version string, status models.NodeStatus) error {
+	_, err := db.Exec(`
+UPDATE nodes
+SET last_seen_at = NOW(), agent_version = $2, status = $3, last_error = '', updated_at = NOW()
+WHERE id = $1`, id, version, string(status))
+	return err
+}
+
+func DeleteNode(db *sql.DB, id uuid.UUID) error {
+	res, err := db.Exec(`DELETE FROM nodes WHERE id = $1`, id)
+	if err != nil {
+		return err
+	}
+	n, err := res.RowsAffected()
+	if err != nil {
+		return err
+	}
+	if n == 0 {
+		return fmt.Errorf("node not found")
+	}
+	return nil
+}