feat: custom content types backend

internal/domain/entry/entryDomain.go

@@ -0,0 +1,64 @@
+package entry
+
+import (
+	"errors"
+	"time"
+)
+
+var (
+	ErrEntryNotFound   = errors.New("entry not found")
+	ErrInvalidEntry    = errors.New("invalid entry")
+	ErrUniqueViolation = errors.New("a unique value is already used")
+	ErrInvalidSort     = errors.New("invalid sort")
+	ErrInvalidPage     = errors.New("invalid page")
+)
+
+const (
+	MaxPage     = 1000000
+	MaxPageSize = 100
+)
+
+func ValidatePage(page int, size int) error {
+	if page > MaxPage || size > MaxPageSize {
+		return ErrInvalidPage
+	}
+	return nil
+}
+
+const (
+	RuleRequired     = "required"
+	RuleUnknownField = "unknown_field"
+	RuleUnique       = "unique"
+)
+
+type Entry struct {
+	ID            uint32         `json:"id"`
+	ContentTypeID uint32         `json:"content_type_id"`
+	Data          map[string]any `json:"data"`
+	CreatedBy     uint32         `json:"created_by"`
+	UpdatedBy     uint32         `json:"updated_by"`
+	CreatedAt     time.Time      `json:"created_at"`
+	UpdatedAt     time.Time      `json:"updated_at"`
+}
+
+type FieldError struct {
+	Key   string
+	Rule  string
+	Cause error
+}
+
+func (e FieldError) Error() string {
+	return e.Key + ": " + e.Rule
+}
+
+func (e FieldError) Unwrap() error {
+	return e.Cause
+}
+
+func invalidField(key string, rule string) error {
+	return FieldError{Key: key, Rule: rule, Cause: ErrInvalidEntry}
+}
+
+func UniqueViolation(key string) error {
+	return FieldError{Key: key, Rule: RuleUnique, Cause: ErrUniqueViolation}
+}