WeKnora deployment source with the reviewed wiki identity, summary and recovery fixes

internal/datasource/errors.go

@@ -0,0 +1,50 @@
+package datasource
+
+import (
+	"errors"
+	"fmt"
+	"strings"
+)
+
+// Error definitions for datasource operations
+var (
+	// Connector errors
+	ErrConnectorNil       = errors.New("connector is nil")
+	ErrConnectorTypeEmpty = errors.New("connector type is empty")
+	ErrConnectorNotFound  = errors.New("connector type not found in registry")
+
+	// DataSource errors
+	ErrDataSourceNotFound  = errors.New("data source not found")
+	ErrDataSourceInvalid   = errors.New("data source configuration is invalid")
+	ErrDataSourceNotActive = errors.New("data source is not active")
+
+	// Configuration errors
+	ErrInvalidConfig      = errors.New("invalid configuration")
+	ErrInvalidCredentials = errors.New("invalid credentials")
+
+	// Sync errors
+	ErrSyncFailed       = errors.New("sync operation failed")
+	ErrSyncCanceled     = errors.New("sync operation was canceled")
+	ErrFetchFailed      = errors.New("failed to fetch items from source")
+	ErrResourceNotFound = errors.New("resource not found in source system")
+
+	// Knowledge base errors
+	ErrKnowledgeBaseNotFound = errors.New("knowledge base not found")
+
+	// Sync log errors
+	ErrSyncLogNotFound = errors.New("sync log not found")
+)
+
+// PartialFetchError indicates that some resources were fetched successfully but
+// others failed. The caller should process Items (if any), persist an updated
+// cursor when provided, and surface Details to the user as a partial sync.
+type PartialFetchError struct {
+	Details []string
+}
+
+func (e *PartialFetchError) Error() string {
+	if e == nil || len(e.Details) == 0 {
+		return "partial fetch: some resources failed"
+	}
+	return fmt.Sprintf("partial fetch: %s", strings.Join(e.Details, "; "))
+}