Refactor Value methods

Dockerfile

@@ -1,7 +1,6 @@
 FROM golang:1.15.6-alpine3.12 AS go-builder
 WORKDIR /src/
 RUN apk --no-cache add upx git
-RUN go get -u github.com/kataras/bindata/cmd/bindata
 ENV GO111MODULE on
 
 COPY go.mod .

pkg/client/value.go

@@ -1,16 +1,26 @@
 package client
 
-import "encoding/json"
+import (
+	"encoding/json"
+	"time"
+)
 
 type Value interface {
 	Error() error
 	Raw() string
-	String() string
+	Scan(v interface{}) error
+	String() (string, bool)
 	StringOr(def string) string
-	Int32() int32
+	Int32() (int32, bool)
 	Int32Or(def int32) int32
-	Bool() bool
+	Int64() (int64, bool)
+	Int64Or(def int64) int64
+	Bool() (bool, bool)
 	BoolOr(def bool) bool
+	Float64() (float64, bool)
+	Float64Or(def float64) float64
+	Duration() (time.Duration, bool)
+	DurationOr(def time.Duration) time.Duration
 }
 
 type jsonValue struct {
@@ -28,38 +38,101 @@ func (v *jsonValue) Raw() string {
 	return v.val
 }
 
-func (v *jsonValue) String() string {
-	return v.StringOr("")
+func (v *jsonValue) Scan(val interface{}) error {
+	return json.Unmarshal([]byte(v.val), val)
 }
 
-func (v *jsonValue) StringOr(def string) string {
+func (v *jsonValue) String() (string, bool) {
 	var ret string
 	if err := json.Unmarshal([]byte(v.val), &ret); err != nil {
-		return def
+		return "", false
 	}
-	return ret
+	return ret, true
 }
 
-func (v *jsonValue) Int32() int32 {
-	return v.Int32Or(0)
+func (v *jsonValue) StringOr(def string) string {
+	if val, ok := v.String(); ok {
+		return val
+	}
+	return def
 }
 
-func (v *jsonValue) Int32Or(def int32) int32 {
+func (v *jsonValue) Int32() (int32, bool) {
 	var ret int32
 	if err := json.Unmarshal([]byte(v.val), &ret); err != nil {
-		return def
+		return 0, false
 	}
-	return ret
+	return ret, true
 }
 
-func (v *jsonValue) Bool() bool {
-	return v.BoolOr(false)
+func (v *jsonValue) Int32Or(def int32) int32 {
+	if val, ok := v.Int32(); ok {
+		return val
+	}
+	return def
 }
 
-func (v *jsonValue) BoolOr(def bool) bool {
+func (v *jsonValue) Int64() (int64, bool) {
+	var ret int64
+	if err := json.Unmarshal([]byte(v.val), &ret); err != nil {
+		return 0, false
+	}
+	return ret, true
+}
+
+func (v *jsonValue) Int64Or(def int64) int64 {
+	if val, ok := v.Int64(); ok {
+		return val
+	}
+	return def
+}
+
+func (v *jsonValue) Bool() (bool, bool) {
 	var ret bool
 	if err := json.Unmarshal([]byte(v.val), &ret); err != nil {
-		return def
+		return false, false
+	}
+	return ret, true
+}
+
+func (v *jsonValue) BoolOr(def bool) bool {
+	if val, ok := v.Bool(); ok {
+		return val
+	}
+	return def
+}
+
+func (v *jsonValue) Float64() (float64, bool) {
+	var ret float64
+	if err := json.Unmarshal([]byte(v.val), &ret); err != nil {
+		return 0, false
+	}
+	return ret, true
+}
+
+func (v *jsonValue) Float64Or(def float64) float64 {
+	if val, ok := v.Float64(); ok {
+		return val
+	}
+	return def
+}
+
+func (v *jsonValue) Duration() (time.Duration, bool) {
+	if str, ok := v.String(); ok {
+		dur, err := time.ParseDuration(str)
+		if err != nil {
+			return 0, false
+		}
+
+		return dur, true
+	}
+
+	return 0, false
+}
+
+func (v *jsonValue) DurationOr(def time.Duration) time.Duration {
+	if val, ok := v.Duration(); ok {
+		return val
 	}
-	return ret
+	return def
 }