init push

internal/shared/pkg/apperrors/delete_conflict.go

@@ -0,0 +1,57 @@
+package apperrors
+
+import (
+	"errors"
+	"fmt"
+	"strings"
+)
+
+type DeleteConflictError struct {
+	RelatedModules []string
+}
+
+func (e *DeleteConflictError) Error() string {
+	modules := cleanModules(e.RelatedModules)
+	if len(modules) == 0 {
+		return "cannot delete this data because it is currently used by another module. please remove the relation first"
+	}
+	return fmt.Sprintf(
+		"cannot delete this data because it is currently used by %s. please remove the relation first",
+		strings.Join(modules, ", "),
+	)
+}
+
+func IsDeleteConflict(err error) bool {
+	var target *DeleteConflictError
+	return errors.As(err, &target)
+}
+
+func AsDeleteConflict(err error) (*DeleteConflictError, bool) {
+	var target *DeleteConflictError
+	if !errors.As(err, &target) {
+		return nil, false
+	}
+	return target, true
+}
+
+func NewDeleteConflictError(relatedModules ...string) error {
+	return &DeleteConflictError{RelatedModules: cleanModules(relatedModules)}
+}
+
+func cleanModules(in []string) []string {
+	out := make([]string, 0, len(in))
+	seen := map[string]struct{}{}
+	for _, module := range in {
+		trimmed := strings.TrimSpace(module)
+		if trimmed == "" {
+			continue
+		}
+		key := strings.ToLower(trimmed)
+		if _, ok := seen[key]; ok {
+			continue
+		}
+		seen[key] = struct{}{}
+		out = append(out, trimmed)
+	}
+	return out
+}