fix(pkg/types): use measured values as struct instead interface

pkg/types/measuredValue.go

@@ -1,21 +1,19 @@
 package types
 
-import "time"
+import (
+	"fmt"
+	"time"
+)
 
-type MeasuredValue interface {
-	GetID() string
-	GetMeasuredValueType() MeasuredValueType
-	GetValue() float64
-	GetFromDate() time.Time
-	GetTillDate() time.Time
-	GetSensorID() string
-	GetCreationDate() *time.Time
-	GetUpdateDate() *time.Time
-
-	SetValue(value float64)
-	SetTillDate(date time.Time)
-	SetCreationDate(date *time.Time)
-	SetUpdateDate(date *time.Time)
+type MeasuredValue struct {
+	ID           string            `json:"id" xml:"id"`
+	Value        float64           `json:"value,string" xml:"value,string"`
+	ValueType    MeasuredValueType `json:"value_type" xml:"value_type"`
+	FromDate     time.Time         `json:"from_date" xml:"from_date"`
+	TillDate     time.Time         `json:"till_date" xml:"till_date"`
+	SensorID     string            `json:"sensor_id" xml:"sensor_id"`
+	CreationDate *time.Time        `json:"creation_date" xml:"creation_date"`
+	UpdateDate   *time.Time        `json:"update_date" xml:"update_date"`
 }
 
 type MeasuredValueType string
@@ -31,3 +29,24 @@ var MeasuredValueTypes = []MeasuredValueType{
 	MeasuredValueTypePressure,
 	MeasuredValueTypeTemperature,
 }
+
+func SelectMeasuredValues(measuredValueType MeasuredValueType, measuredValues []*MeasuredValue) []*MeasuredValue {
+	cachedMeasuredValues := make([]*MeasuredValue, 0)
+	for _, measuredValue := range measuredValues {
+		if measuredValue.ValueType == measuredValueType {
+			cachedMeasuredValues = append(cachedMeasuredValues, measuredValue)
+		}
+	}
+
+	return cachedMeasuredValues
+}
+
+func SelectMeasuredValueType(valueType string) (*MeasuredValueType, error) {
+	for _, measuredValueType := range MeasuredValueTypes {
+		if fmt.Sprint(measuredValueType) == valueType {
+			return &measuredValueType, nil
+		}
+	}
+
+	return nil, fmt.Errorf("Can not determine value type: %v", valueType)
+}