Extract field options to a separate file, add helper functions to extract opts

compose/types/module_field.go

@@ -6,8 +6,6 @@ import (
 	"sort"
 	"time"
 
-	"github.com/pkg/errors"
-
 	"github.com/cortezaproject/corteza-server/pkg/permissions"
 )
 
@@ -34,33 +32,12 @@ type (
 		UpdatedAt *time.Time `db:"updated_at" json:"updatedAt,omitempty"`
 		DeletedAt *time.Time `db:"deleted_at" json:"deletedAt,omitempty"`
 	}
-
-	ModuleFieldOptions map[string]interface{}
 )
 
 var (
 	_ sort.Interface = &ModuleFieldSet{}
 )
 
-func (mfo *ModuleFieldOptions) Scan(value interface{}) error {
-	//lint:ignore S1034 This typecast is intentional, we need to get []byte out of a []uint8
-	switch value.(type) {
-	case nil:
-		*mfo = ModuleFieldOptions{}
-	case []uint8:
-		b := value.([]byte)
-		if err := json.Unmarshal(b, mfo); err != nil {
-			return errors.Wrapf(err, "Can not scan '%v' into ModuleFieldOptions", string(b))
-		}
-	}
-
-	return nil
-}
-
-func (mfo ModuleFieldOptions) Value() (driver.Value, error) {
-	return json.Marshal(mfo)
-}
-
 // Resource returns a system resource ID for this type
 func (m ModuleField) PermissionResource() permissions.Resource {
 	return ModuleFieldPermissionResource.AppendID(m.ID)

compose/types/module_field_options.go

@@ -0,0 +1,81 @@
+package types
+
+import (
+	"database/sql/driver"
+	"encoding/json"
+	"github.com/pkg/errors"
+)
+
+type (
+	ModuleFieldOptions map[string]interface{}
+)
+
+const (
+	moduleFieldOptionIsUnique           = "isUnique"
+	moduleFieldOptionIsUniqueMultiValue = "isUniqueMultiValue"
+)
+
+func (opt *ModuleFieldOptions) Scan(value interface{}) error {
+	//lint:ignore S1034 This typecast is intentional, we need to get []byte out of a []uint8
+	switch value.(type) {
+	case nil:
+		*opt = ModuleFieldOptions{}
+	case []uint8:
+		b := value.([]byte)
+		if err := json.Unmarshal(b, opt); err != nil {
+			return errors.Wrapf(err, "Can not scan '%v' into ModuleFieldOptions", string(b))
+		}
+	}
+
+	return nil
+}
+
+func (opt ModuleFieldOptions) Value() (driver.Value, error) {
+	return json.Marshal(opt)
+}
+
+// Bool returns option value for key as boolean true or false
+//
+// Invalid, non-existing are returned as false
+func (opt ModuleFieldOptions) Bool(key string) bool {
+	if _, has := opt[key]; has {
+		if v, ok := opt[key].(bool); ok {
+			return v
+		}
+	}
+
+	return false
+}
+
+// Strings returns option value for key as slice of strings
+//
+// Invalid, non-existing are returned as nil
+func (opt ModuleFieldOptions) Strings(key string) []string {
+	if _, has := opt[key]; has {
+		if v, ok := opt[key].([]string); ok {
+			return v
+		}
+	}
+
+	return nil
+}
+
+// IsUnique - should value in this field be unique across records?
+func (opt ModuleFieldOptions) IsUnique() bool {
+	return opt.Bool(moduleFieldOptionIsUnique)
+}
+
+// SetIsUnique - should value in this field be unique across records?
+func (opt ModuleFieldOptions) SetIsUnique(value bool) {
+	opt[moduleFieldOptionIsUnique] = value
+}
+
+// IsUniqueMultiValue - should value in this field be unique in the multi-value set?
+func (opt ModuleFieldOptions) IsUniqueMultiValue() bool {
+	return opt.Bool(moduleFieldOptionIsUniqueMultiValue)
+}
+
+func (opt ModuleFieldOptions) SetIsUniqueMultiValue(value bool) {
+	// SetIsUniqueMultiValue - should value in this field be unique in the multi-value set?
+	opt[moduleFieldOptionIsUniqueMultiValue] = value
+}