Filter field getters

app/main.go

@@ -7,7 +7,9 @@ import (
 	"repo-pattern/app/lib/logging"
 	"repo-pattern/app/models"
 	"repo-pattern/app/repository"
+	"repo-pattern/app/repository/smartfilter"
 
+	"github.com/google/uuid"
 	"gorm.io/gorm"
 )
 
@@ -20,8 +22,11 @@ func doMagic(db *gorm.DB) {
 	var err error
 	query := db
 
-	f := repository.SmartCertFilter[models.Cert]{
+	id, _ := uuid.FromBytes([]byte("6dc096ab-5c03-427e-b808-c669f7446131"))
+
+	f := smartfilter.SmartCertFilter[models.Cert]{
 		Alive: &TRUE,
+		Id:    &id,
 	}
 
 	query, err = f.ToQuery(query)

app/repository/smartfilter/filterfield.go

@@ -0,0 +1,105 @@
+package smartfilter
+
+import (
+	"fmt"
+	"reflect"
+
+	"github.com/google/uuid"
+)
+
+type valueGetterFunc func(ff *FilterField, v reflect.Value) error
+
+type FilterField struct {
+	Name     string
+	Operator Operator
+
+	boolValue  bool
+	intValue   int64
+	uintValue  uint64
+	floatValue float64
+	strValue   string
+}
+
+func boolValueGetter(ff *FilterField, v reflect.Value) error {
+	ff.boolValue = v.Bool()
+	return nil
+}
+
+func intValueGetter(ff *FilterField, v reflect.Value) error {
+	ff.intValue = v.Int()
+	return nil
+}
+
+func uintValueGetter(ff *FilterField, v reflect.Value) error {
+	ff.uintValue = v.Uint()
+	return nil
+}
+
+func floatValueGetter(ff *FilterField, v reflect.Value) error {
+	ff.floatValue = v.Float()
+	return nil
+}
+
+func strValueGetter(ff *FilterField, v reflect.Value) error {
+	ff.strValue = v.String()
+	return nil
+}
+
+func uuidValueGetter(ff *FilterField, v reflect.Value) error {
+	uid, err := uuid.FromBytes([]byte(v.String()))
+	if err != nil {
+		return err
+	}
+	ff.strValue = uid.String()
+	return nil
+}
+
+func unsupportedValueGetter(ff *FilterField, v reflect.Value) error {
+	return fmt.Errorf("unsupported type: %v", v.Type())
+}
+
+func newTypeGetter(t reflect.Type, allowAddr bool) valueGetterFunc {
+	// If we have a non-pointer value whose type implements
+	// Marshaler with a value receiver, then we're better off taking
+	// the address of the value - otherwise we end up with an
+	// allocation as we cast the value to an interface.
+	// if t.Kind() != reflect.Pointer && allowAddr && reflect.PointerTo(t).Implements(marshalerType) {
+	// 	return newCondAddrEncoder(addrMarshalerEncoder, newTypeEncoder(t, false))
+	// }
+	// if t.Implements(marshalerType) {
+	// 	return marshalerEncoder
+	// }
+	// if t.Kind() != reflect.Pointer && allowAddr && reflect.PointerTo(t).Implements(textMarshalerType) {
+	// 	return newCondAddrEncoder(addrTextMarshalerEncoder, newTypeEncoder(t, false))
+	// }
+	// if t.Implements(textMarshalerType) {
+	// 	return textMarshalerEncoder
+	// }
+
+	switch t.Kind() {
+	case reflect.Bool:
+		return boolValueGetter
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		return intValueGetter
+	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
+		return uintValueGetter
+	case reflect.Float32, reflect.Float64:
+		return floatValueGetter
+	case reflect.String:
+		return strValueGetter
+	// case reflect.Interface:
+	// 	return interfaceEncoder
+	// case reflect.Struct:
+	// 	return newStructEncoder(t)
+	// case reflect.Map:
+	// 	return newMapEncoder(t)
+	// case reflect.Slice:
+	// 	return newSliceEncoder(t)
+	// case reflect.Array:
+	// 	return newArrayEncoder(t)
+	// case reflect.Pointer:
+	// 	return newPtrEncoder(t)
+	default:
+		return unsupportedValueGetter
+	}
+}

app/repository/smartfilter/smartfilter.go

@@ -1,4 +1,4 @@
-package repository
+package smartfilter
 
 import (
 	"fmt"
@@ -23,11 +23,6 @@ const (
 
 var OPERATORS = []Operator{OperatorEQ, OperatorIN}
 
-type FilterField struct {
-	Name     string
-	Operator Operator
-}
-
 type SmartCertFilter[T schema.Tabler] struct {
 	Model     T
 	Alive     *bool        `filterfield:"alive,EQ"`
@@ -40,33 +35,46 @@ func (f SmartCertFilter[T]) ToQuery(query *gorm.DB) (*gorm.DB, error) {
 	tableName := f.Model.TableName()
 
 	fmt.Printf("Table name: %s\n", tableName)
-	fmt.Printf("%+v\n", f)
+	// fmt.Printf("%+v\n", f)
 
 	st := reflect.TypeOf(f)
 	modelName := st.Name()
+	reflectValue := reflect.ValueOf(f)
 
 	for i := 0; i < st.NumField(); i++ {
 		field := st.Field(i)
 		tagValue := field.Tag.Get(TAG_NAME)
+
+		// skip field if filter tag is not present
 		if len(tagValue) == 0 {
 			continue
 		}
 
+		fieldReflect := reflectValue.FieldByName(field.Name)
+
+		// skip field if value is nil
+		if fieldReflect.IsNil() {
+			continue
+		}
+
+		t := fieldReflect.Type()
+		fmt.Printf(">>> %+v    --- %+v\n", field, t)
+
 		filterField, err := getFilterField(tagValue)
 		if err != nil {
 			return nil, fmt.Errorf("%s.%s: %s", modelName, field.Name, err)
 		}
 
-		fmt.Printf(
-			"tagValue: %s, Name: %s, Operator: %s\n",
-			tagValue,
-			filterField.Name,
-			filterField.Operator,
-		)
+		// fmt.Printf(
+		// 	"tagValue: %s, Name: %s, Operator: %s\n",
+		// 	tagValue,
+		// 	filterField.Name,
+		// 	filterField.Operator,
+		// )
 
 		switch filterField.Operator {
 		case OperatorEQ:
-			query = applyFilterEQ(query, tableName, filterField)
+			query = applyFilterEQ[string](query, tableName, filterField)
 		}
 	}
 
@@ -75,7 +83,9 @@ func (f SmartCertFilter[T]) ToQuery(query *gorm.DB) (*gorm.DB, error) {
 	return query, nil
 }
 
-func applyFilterEQ(query *gorm.DB, tableName string, filterField *FilterField) *gorm.DB {
+func applyFilterEQ[T int | bool | string](query *gorm.DB, tableName string, filterField *FilterField) *gorm.DB {
+	// query = query.Where(fmt.Sprint("%s.%s = ?", tableName, filterField.Name), )
+
 	return query
 }