golang dynamic json embed resource example

// https://harendra21.medium.com/dynamic-json-parsing-in-golang-a1411c9e6cf7
package main

import (
    _ "embed"
    "encoding/json"
    "fmt"
)

//go:embed test.json
var jsonData []byte

func main() {
    // Parse JSON into an empty interface
    var result interface{}
    err := json.Unmarshal(jsonData, &result)
    if err != nil {
        fmt.Println("Error:", err)
        return
    }

    // Accessing dynamic JSON fields
    dataMap, ok := result.(map[string]interface{})
    if !ok {
        fmt.Println("Invalid JSON structure")
        return
    }

    // Accessing specific fields
    name, nameExists := dataMap["name"].(string)
    age, ageExists := dataMap["age"].(float64)
    city, cityExists := dataMap["city"].(string)
    hasCar, hasCarExists := dataMap["hasCar"].(bool)
    languages, languagesExists := dataMap["languages"].([]interface{})

    // Displaying parsed data
    if nameExists {
        fmt.Println("Name:", name)
    }

    if ageExists {
        fmt.Println("Age:", int(age))
    }

    if cityExists {
        fmt.Println("City:", city)
    }

    if hasCarExists {
        fmt.Println("Has Car:", hasCar)
    }

    if languagesExists {
        fmt.Println("Languages:")
        for _, lang := range languages {
            fmt.Println(" -", lang)
        }
    }
}


/* test.json file
{
    "name": "John Doe",
    "age": 30,
    "city": "New York",
    "hasCar": true,
    "languages": ["Go", "JavaScript"]
}
*/