safetwitch-backend/extractor/twitchExtractor.go

package extractor

import (
	"bytes"
	"encoding/json"
	"errors"
	"fmt"
	"io"
	"log"
	"net/http"
	"safetwitch-backend/extractor/structs"

	"github.com/tidwall/gjson"
)

const twitchUrl = "https://gql.twitch.tv/gql"

func call(url, method string, body io.Reader) (*http.Response, error) {
	req, err := http.NewRequest(method, url, body)
	if err != nil {
		return req.Response, fmt.Errorf("Got error %s", err.Error())
	}

	req.Header.Add("Client-Id", "kimne78kx3ncx6brgo4mv6wki5h1ko")
	resp, err := http.DefaultClient.Do(req)
	return resp, err
}

type TwitchPayload = map[string]interface{}

func GetStreamerInfo(streamerName string) (structs.TwitchApiResponse, error) {
	payload := []TwitchPayload{
		{
			"operationName": "ChannelRoot_AboutPanel",
			"variables": map[string]interface{}{
				"channelLogin": streamerName,
				"skipSchedule": false,
			},
			"extensions": map[string]interface{}{
				"persistedQuery": map[string]interface{}{
					"version":    1,
					"sha256Hash": "6089531acef6c09ece01b440c41978f4c8dc60cb4fa0124c9a9d3f896709b6c6",
				},
			},
		},
		{
			"operationName": "StreamMetadata",
			"variables": map[string]interface{}{
				"channelLogin": streamerName,
			},
			"extensions": map[string]interface{}{
				"persistedQuery": map[string]interface{}{
					"version":    1,
					"sha256Hash": "a647c2a13599e5991e175155f798ca7f1ecddde73f7f341f39009c14dbf59962",
				},
			},
		},
		{
			"operationName": "StreamTagsTrackingChannel",
			"variables": map[string]interface{}{
				"channel": streamerName,
			},
			"extensions": map[string]interface{}{
				"persistedQuery": map[string]interface{}{
					"version":    1,
					"sha256Hash": "6aa3851aaaf88c320d514eb173563d430b28ed70fdaaf7eeef6ed4b812f48608",
				},
			},
		},
		{
			"operationName": "VideoPreviewOverlay",
			"variables": map[string]interface{}{
				"login": streamerName,
			},
			"extensions": map[string]interface{}{
				"persistedQuery": map[string]interface{}{
					"version":    1,
					"sha256Hash": "9515480dee68a77e667cb19de634739d33f243572b007e98e67184b1a5d8369f",
				},
			},
		},
		{
			"operationName": "UseViewCount",
			"variables": map[string]interface{}{
				"channelLogin": streamerName,
			},
			"extensions": map[string]interface{}{
				"persistedQuery": map[string]interface{}{
					"version":    1,
					"sha256Hash": "00b11c9c428f79ae228f30080a06ffd8226a1f068d6f52fbc057cbde66e994c2",
				},
			},
		},
	}

	json_data, err := json.Marshal(payload)

	if err != nil {
		fmt.Errorf("err")
	}
	resp, err := call(twitchUrl, "POST", bytes.NewBuffer(json_data))
	if err != nil {
		fmt.Errorf("y")
	}
	body, err := io.ReadAll(resp.Body)

	var result []structs.TwitchApiResponse
	err = json.Unmarshal(body, &result)
	if err != nil {
		log.Fatalln(err)
	}

	// begin parsing response
	streamerFound := gjson.Get(string(body), "0.data.user")
	if streamerFound.String() == "" {
		return result[0], errors.New("streamer not found")
	}

	streamerData := gjson.Get(string(body), "0.data")
	parsedSocials, err := ParseSocials(streamerData.String())
	if err != nil {
		return result[0], nil
	}
	log.Println(parsedSocials)

	return result[0], nil
}