Make full sync push pending and pull projects/configurations

internal/services/sync/service.go

@@ -5,6 +5,7 @@ import (
 	"errors"
 	"fmt"
 	"log/slog"
+	"sort"
 	"strings"
 	"time"
 
@@ -64,6 +65,13 @@ type ConfigImportResult struct {
 	Skipped  int `json:"skipped"`
 }
 
+// ProjectImportResult represents server->local project import stats.
+type ProjectImportResult struct {
+	Imported int `json:"imported"`
+	Updated  int `json:"updated"`
+	Skipped  int `json:"skipped"`
+}
+
 // ConfigurationChangePayload is stored in pending_changes.payload for configuration events.
 // It carries version metadata so sync can push the latest snapshot and prepare for conflict resolution.
 type ConfigurationChangePayload struct {
@@ -153,6 +161,77 @@ func (s *Service) ImportConfigurationsToLocal() (*ConfigImportResult, error) {
 	return result, nil
 }
 
+// ImportProjectsToLocal imports projects from MariaDB into local SQLite.
+// Existing local projects with pending local changes are skipped to avoid data loss.
+func (s *Service) ImportProjectsToLocal() (*ProjectImportResult, error) {
+	mariaDB, err := s.getDB()
+	if err != nil {
+		return nil, ErrOffline
+	}
+
+	projectRepo := repository.NewProjectRepository(mariaDB)
+	result := &ProjectImportResult{}
+
+	offset := 0
+	const limit = 200
+	for {
+		serverProjects, _, err := projectRepo.List(offset, limit, true)
+		if err != nil {
+			return nil, fmt.Errorf("listing server projects: %w", err)
+		}
+		if len(serverProjects) == 0 {
+			break
+		}
+
+		now := time.Now()
+		for i := range serverProjects {
+			project := serverProjects[i]
+
+			existing, getErr := s.localDB.GetProjectByUUID(project.UUID)
+			if getErr != nil && !errors.Is(getErr, gorm.ErrRecordNotFound) {
+				return nil, fmt.Errorf("getting local project %s: %w", project.UUID, getErr)
+			}
+
+			if existing != nil && getErr == nil {
+				// Keep unsynced local changes intact.
+				if existing.SyncStatus == "pending" {
+					result.Skipped++
+					continue
+				}
+
+				existing.OwnerUsername = project.OwnerUsername
+				existing.Name = project.Name
+				existing.IsActive = project.IsActive
+				existing.IsSystem = project.IsSystem
+				existing.CreatedAt = project.CreatedAt
+				existing.UpdatedAt = project.UpdatedAt
+				serverID := project.ID
+				existing.ServerID = &serverID
+				existing.SyncStatus = "synced"
+				existing.SyncedAt = &now
+
+				if err := s.localDB.SaveProject(existing); err != nil {
+					return nil, fmt.Errorf("saving local project %s: %w", project.UUID, err)
+				}
+				result.Updated++
+				continue
+			}
+
+			localProject := localdb.ProjectToLocal(&project)
+			localProject.SyncStatus = "synced"
+			localProject.SyncedAt = &now
+			if err := s.localDB.SaveProject(localProject); err != nil {
+				return nil, fmt.Errorf("saving local project %s: %w", project.UUID, err)
+			}
+			result.Imported++
+		}
+
+		offset += len(serverProjects)
+	}
+
+	return result, nil
+}
+
 // GetStatus returns the current sync status
 func (s *Service) GetStatus() (*SyncStatus, error) {
 	lastSync := s.localDB.GetLastSyncTime()
@@ -371,21 +450,85 @@ func (s *Service) ListUserSyncStatuses(onlineThreshold time.Duration) ([]UserSyn
 		return nil, fmt.Errorf("load sync status rows: %w", err)
 	}
 
+	activeUsers, err := s.listConnectedDBUsers(mariaDB)
+	if err != nil {
+		slog.Debug("sync status: failed to load connected DB users", "error", err)
+		activeUsers = map[string]struct{}{}
+	}
+
 	now := time.Now().UTC()
-	result := make([]UserSyncStatus, 0, len(rows))
+	result := make([]UserSyncStatus, 0, len(rows)+len(activeUsers))
 	for i := range rows {
 		r := rows[i]
+		username := strings.TrimSpace(r.Username)
+		if username == "" {
+			continue
+		}
+
+		isOnline := now.Sub(r.LastSyncAt) <= onlineThreshold
+		if _, connected := activeUsers[username]; connected {
+			isOnline = true
+			delete(activeUsers, username)
+		}
+
+		appVersion := strings.TrimSpace(r.AppVersion)
+
 		result = append(result, UserSyncStatus{
-			Username:   r.Username,
+			Username:   username,
 			LastSyncAt: r.LastSyncAt,
-			AppVersion: strings.TrimSpace(r.AppVersion),
-			IsOnline:   now.Sub(r.LastSyncAt) <= onlineThreshold,
+			AppVersion: appVersion,
+			IsOnline:   isOnline,
 		})
 	}
 
+	for username := range activeUsers {
+		result = append(result, UserSyncStatus{
+			Username:   username,
+			LastSyncAt: now,
+			AppVersion: "",
+			IsOnline:   true,
+		})
+	}
+
+	sort.SliceStable(result, func(i, j int) bool {
+		if result[i].IsOnline != result[j].IsOnline {
+			return result[i].IsOnline
+		}
+		if result[i].LastSyncAt.Equal(result[j].LastSyncAt) {
+			return strings.ToLower(result[i].Username) < strings.ToLower(result[j].Username)
+		}
+		return result[i].LastSyncAt.After(result[j].LastSyncAt)
+	})
+
 	return result, nil
 }
 
+func (s *Service) listConnectedDBUsers(mariaDB *gorm.DB) (map[string]struct{}, error) {
+	type processUserRow struct {
+		Username string `gorm:"column:username"`
+	}
+
+	var rows []processUserRow
+	if err := mariaDB.Raw(`
+		SELECT DISTINCT TRIM(USER) AS username
+		FROM information_schema.PROCESSLIST
+		WHERE COALESCE(TRIM(USER), '') <> ''
+		  AND DB = DATABASE()
+	`).Scan(&rows).Error; err != nil {
+		return nil, err
+	}
+
+	users := make(map[string]struct{}, len(rows))
+	for i := range rows {
+		username := strings.TrimSpace(rows[i].Username)
+		if username == "" {
+			continue
+		}
+		users[username] = struct{}{}
+	}
+	return users, nil
+}
+
 func ensureUserSyncStatusTable(db *gorm.DB) error {
 	if err := db.Exec(`
 		CREATE TABLE IF NOT EXISTS qt_pricelist_sync_status (