golang pointer example 2

AdvancPointer.go

package main

import (

	"encoding/json"
	"fmt"
	"log"
)



type EchoResponse struct {
	Version           string                 `json:"version"`
	SessionAttributes map[string]interface{} `json:"sessionAttributes,omitempty"`
	Response          EchoRespBody           `json:"response"`
}

// EchoRespBody contains the body of the response to be sent back to the Alexa service.
// This includes things like the text that should be spoken or any cards that should
// be shown in the Alexa companion app.
type EchoRespBody struct {
	OutputSpeech     *EchoRespPayload `json:"outputSpeech,omitempty"`
	Card             *EchoRespPayload `json:"card,omitempty"`
	ShouldEndSession bool             `json:"shouldEndSession"`
}

// EchoRespPayload contains the interesting parts of the Echo response including text to be spoken,
// card attributes, and images.
type EchoRespPayload struct {
	Type    string `json:"type,omitempty"`
	Title   string `json:"title,omitempty"`
	Text    string `json:"text,omitempty"`
	SSML    string `json:"ssml,omitempty"`
	Content string `json:"content,omitempty"`
}

// OutputSpeech will replace any existing text that should be spoken with this new value. If the output
// needs to be constructed in steps or special speech tags need to be used, see the `SSMLTextBuilder`.
func (r *EchoResponse) OutputSpeech(text string) *EchoResponse {
	r.Response.OutputSpeech = &EchoRespPayload{
		Type: "PlainText",
		Text: text,
	}

	return r
}

// Card will add a card to the Alexa app's response with the provided title and content strings.
func (r *EchoResponse) Card(title string, content string) *EchoResponse {
	return r.SimpleCard(title, content)
}

// SimpleCard will indicate that a card should be included in the Alexa companion app as part of the response.
// The card will be shown with the provided title and content.
func (r *EchoResponse) SimpleCard(title string, content string) *EchoResponse {
	r.Response.Card = &EchoRespPayload{
		Type:    "Simple",
		Title:   title,
		Content: content,
	}

	return r
}
func main() {
	var echoResp EchoResponse

	echoResp.OutputSpeech("Hello world from my new Echo test app!").Card("Hello World", "This is a test card.")

	empJSON, err := json.MarshalIndent(echoResp, "", "  ")
	if err != nil {
		log.Fatalf(err.Error())
	}
	fmt.Printf("MarshalIndent funnction output\n %s\n", string(empJSON))
}