How to replace json values from key-value map in GOlang - go

Question

I have below json & I need to replace employee_names to emp_id from a map.
Tried this GolangPlay , but not sure how to replace values from the given map and error handling if the value is not present in given map.
Json data:
[
{
"dept": "IT",
"condition": {
"employee": [
"emp1"
]
}
},
{
"dept": "HR",
"condition": {
"employee": [
"emp2",
"emp3"
]
}
}
]
Map data:
[{emp1 14325} {emp3 49184} {emp2 21518}]
Expected output:
[
{
"dept": "IT",
"condition": {
"employee": [
14325
]
}
},
{
"dept": "HR",
"condition": {
"employee": [
21518,
49184
]
}
}
]
code :
Started with below code , but not sure how to use the given map to replace with error handling.
package main
import (
"encoding/json"
"fmt"
//"strconv"
//"log"
)
func main() {
jsonStr := `[
{
"dept": "IT",
"condition": {
"employee": [
"emp1"
]
}
},
{
"dept": "HR",
"condition": {
"employee": [
"emp2",
"emp3"
]
}
}
]`
empMap := `[{emp1 14325} {emp3 49184} {emp2 21518}]`
type GetEmployee []struct {
Dept string `json:"dept"`
Condition struct {
Employee []string `json:"employee"`
} `json:"condition"`
}
var empResponse GetEmployee
unmarshallingError := json.Unmarshal([]byte(string(jsonStr)), &empResponse)
if unmarshallingError != nil {
fmt.Println(unmarshallingError.Error())
}
fmt.Println(empResponse)
fmt.Println(empMap)
for i := range empResponse {
fmt.Println(i)
}
}

Answer 1

Instead of storing the ids in an array of {ids: value}, it will be better for them to be in a map instead.
The above will range over the Employees' name and change it to the id. A check is made to see if there is a certain id key in the map.
for i, e := range empResponse {
fmt.Println(e)
for j,val := range empResponse[i].Condition.Employee {
if _, ok := ids[val]; ok {
empResponse[i].Condition.Employee[j] = ids[val]
}
}
}
Full code
package main
import (
"encoding/json"
"fmt"
//"strconv"
//"log"
)
func main() {
jsonStr := `[
{
"dept": "IT",
"condition": {
"employee": [
"emp1"
]
}
},
{
"dept": "HR",
"condition": {
"employee": [
"emp2",
"emp3"
]
}
}
]`
empMap := `{"emp1": "14325", "emp3": "49184", "emp2": "21518"}`
type GetEmployee []struct {
Dept string `json:"dept"`
Condition struct {
Employee []string `json:"employee"`
} `json:"condition"`
}
var empResponse GetEmployee
var ids map[string]string
unmarshallingError := json.Unmarshal([]byte(string(jsonStr)), &empResponse)
if unmarshallingError != nil {
fmt.Println(unmarshallingError.Error())
}
json.Unmarshal([]byte(empMap), &ids)
fmt.Println(empResponse)
fmt.Println(ids)
for i, e := range empResponse {
fmt.Println(e)
for j,val := range empResponse[i].Condition.Employee {
if _, ok := ids[val]; ok {
empResponse[i].Condition.Employee[j] = ids[val]
}
}
}
fmt.Println(empResponse)
}
playground
In the above, the id are strings since the name to be replaced are strings. Actually Employee are of type []string. If a string is to be replaced by an int, then Employee type needs to be changed to []interface{}.
playground