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helpers.go
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/
helpers.go
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package idex
import (
"encoding/json"
"strconv"
)
// UnmarshalErrorOnType is true when the error was a json.UnmarshalTypeError on type t
func UnmarshalErrorOnType(err error, t string) bool {
switch e := err.(type) {
case *json.UnmarshalTypeError:
if e.Value == t {
return true
}
}
return false
}
// UnmarshalJSON custom for Volume
func (v *Volume) UnmarshalJSON(b []byte) error {
if err := json.Unmarshal(b, &v.Markets); err != nil {
// expecting error on totalETH field having a string value
if !UnmarshalErrorOnType(err, "string") {
return err
}
}
delete(v.Markets, "totalETH")
type total struct {
TotalETH string `json:"totalETH"`
}
t := total{}
if err := json.Unmarshal(b, &t); err != nil {
return err
}
v.TotalETH = t.TotalETH
return nil
}
// UnmarshalJSON custom for TradeInserted to handle V as string or int
func (ti *TradeInserted) UnmarshalJSON(b []byte) error {
// prevent infinite loop
type Alias TradeInserted
a := Alias{}
if err := json.Unmarshal(b, &a); err != nil {
if UnmarshalErrorOnType(err, "string") {
// auxiliary struct to wrap problem field
aux := &struct {
V string `json:"v"`
*Alias
}{
Alias: (*Alias)(ti),
}
if err = json.Unmarshal(b, aux); err != nil {
return err
}
// turn it back into an int
i, errr := strconv.Atoi(aux.V)
if errr != nil {
return errr
}
a.V = i
} else {
return err
}
}
// reassign alias type
*ti = TradeInserted(a)
return nil
}
// UnmarshalJSON custom for OrderInserted to handle V as string or int
func (oi *OrderInserted) UnmarshalJSON(b []byte) error {
// prevent infinite loop
type Alias OrderInserted
a := Alias{}
if err := json.Unmarshal(b, &a); err != nil {
if UnmarshalErrorOnType(err, "string") {
// auxiliary struct to wrap problem field
aux := &struct {
V string `json:"v"`
*Alias
}{
Alias: (*Alias)(oi),
}
if err = json.Unmarshal(b, aux); err != nil {
return err
}
// turn it back into an int
i, errr := strconv.Atoi(aux.V)
if errr != nil {
return errr
}
a.V = i
} else {
return err
}
}
// reassign alias type
*oi = OrderInserted(a)
return nil
}
// UnmarshalJSON custom for PushCancel to handle V as string or int
func (pc *PushCancel) UnmarshalJSON(b []byte) error {
// prevent infinite loop
type Alias PushCancel
a := Alias{}
if err := json.Unmarshal(b, &a); err != nil {
if UnmarshalErrorOnType(err, "string") {
// auxiliary struct to wrap problem field
aux := &struct {
V string `json:"v"`
*Alias
}{
Alias: (*Alias)(pc),
}
if err = json.Unmarshal(b, aux); err != nil {
return err
}
// turn it back into an int
i, errr := strconv.Atoi(aux.V)
if errr != nil {
return errr
}
a.V = i
} else {
return err
}
}
// reassign alias type
*pc = PushCancel(a)
return nil
}