safetwitch-backend/extractor/twitch/Streamer.go

package twitch

import (
	"errors"
	"safetwitch-backend/extractor"
	"safetwitch-backend/extractor/structs"

	"github.com/tidwall/gjson"
)

func GetStreamerInfo(streamerName string) (structs.Streamer, error) {
	payload := []TwitchPayload{
		// Streamer data
		{
			"operationName": "ChannelRoot_AboutPanel",
			"variables": map[string]interface{}{
				"channelLogin": streamerName,
				"skipSchedule": false,
			},
			"extensions": map[string]interface{}{
				"persistedQuery": map[string]interface{}{
					"version":    1,
					"sha256Hash": "6089531acef6c09ece01b440c41978f4c8dc60cb4fa0124c9a9d3f896709b6c6",
				},
			},
		},

		// Stream metadata
		{
			"operationName": "StreamMetadata",
			"variables": map[string]interface{}{
				"channelLogin": streamerName,
			},
			"extensions": map[string]interface{}{
				"persistedQuery": map[string]interface{}{
					"version":    1,
					"sha256Hash": "a647c2a13599e5991e175155f798ca7f1ecddde73f7f341f39009c14dbf59962",
				},
			},
		},

		// Stream tags
		{
			"operationName": "StreamTagsTrackingChannel",
			"variables": map[string]interface{}{
				"channel": streamerName,
			},
			"extensions": map[string]interface{}{
				"persistedQuery": map[string]interface{}{
					"version":    1,
					"sha256Hash": "6aa3851aaaf88c320d514eb173563d430b28ed70fdaaf7eeef6ed4b812f48608",
				},
			},
		},

		// Stream preview image
		{
			"operationName": "VideoPreviewOverlay",
			"variables": map[string]interface{}{
				"login": streamerName,
			},
			"extensions": map[string]interface{}{
				"persistedQuery": map[string]interface{}{
					"version":    1,
					"sha256Hash": "9515480dee68a77e667cb19de634739d33f243572b007e98e67184b1a5d8369f",
				},
			},
		},

		// Current views
		{
			"operationName": "UseViewCount",
			"variables": map[string]interface{}{
				"channelLogin": streamerName,
			},
			"extensions": map[string]interface{}{
				"persistedQuery": map[string]interface{}{
					"version":    1,
					"sha256Hash": "00b11c9c428f79ae228f30080a06ffd8226a1f068d6f52fbc057cbde66e994c2",
				},
			},
		},

		// Get offline banner image
		{
			"operationName": "ChannelShell",
			"variables": map[string]interface{}{
				"login": streamerName,
			},
			"extensions": map[string]interface{}{
				"persistedQuery": map[string]interface{}{
					"version":    1,
					"sha256Hash": "580ab410bcd0c1ad194224957ae2241e5d252b2c5173d8e0cce9d32d5bb14efe",
				},
			},
		},
	}

	_, body, err := parseResponse(payload)
	if err != nil {
		return structs.Streamer{}, err
	}

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

	streamerData := gjson.Get(string(body), "0.data")
	parsedSocials, err := ParseSocials(streamerData.String())
	if err != nil {
		return structs.Streamer{}, err
	}

	parsedStream, err := ParseStream(string(body), 0)
	var isLive bool
	if err != nil {
		if err.Error() == "streamer is not live" {
			parsedStream = nil
		} else {
			return structs.Streamer{}, err
		}
	}
	if parsedStream != nil {
		isLive = true
	} else {
		isLive = false
	}

	streamerBanner := gjson.Get(string(body), "5.data.userOrError.bannerImageURL").String()

	parsedStreamer, err := ParseStreamer(streamerData, isLive, parsedSocials, parsedStream, streamerName, streamerBanner)
	if err != nil {
		return structs.Streamer{}, err
	}

	return parsedStreamer, nil
}

func GetStreamerId(channelName string) (string, error) {
	payload := []TwitchPayload{
		{
			"operationName": "ChannelRoot_AboutPanel",
			"variables": map[string]interface{}{
				"channelLogin": channelName,
				"skipSchedule": true,
			},
			"extensions": map[string]interface{}{
				"persistedQuery": map[string]interface{}{
					"version":    1,
					"sha256Hash": "6089531acef6c09ece01b440c41978f4c8dc60cb4fa0124c9a9d3f896709b6c6",
				},
			},
		},
	}

	_, body, err := parseResponse(payload)
	if err != nil {
		return "", err
	}

	id := gjson.Get(string(body), "0.data.user.id").String()

	if id != "" {
		return id, nil
	} else {
		return "", errors.New("could not find user")
	}
}

func BulkCheckIfStreamerIsLive(streamers []string) ([]string, error) {

	if len(streamers) > 35 {
		return []string{}, errors.New("no more than 35 streamers can be fetched at once")
	}

	var payload []TwitchPayload
	for _, streamer := range streamers {
		tmp := TwitchPayload{
			"operationName": "UseLive",
			"variables": map[string]interface{}{
				"channelLogin": streamer,
			},
			"extensions": map[string]interface{}{
				"persistedQuery": map[string]interface{}{
					"version":    1,
					"sha256Hash": "639d5f11bfb8bf3053b424d9ef650d04c4ebb7d94711d644afb08fe9a0fad5d9",
				},
			},
		}

		payload = append(payload, tmp)
	}

	_, body, err := parseResponse(payload)
	if err != nil {
		return []string{}, err
	}

	var liveStreamers []string

	for i := 0; i < len(streamers); i++ {
		stream := gjson.Get(string(body), extractor.GenGjsonQuery(i, ".data.user.stream"))

		if stream.IsObject() {
			liveStreamers = append(liveStreamers, streamers[i])
		}
	}
	return liveStreamers, nil
}

func BulkFollowingUser(streamers []string) ([]structs.FollowingStreamer, error) {

	if len(streamers) > 35 {
		return []structs.FollowingStreamer{}, errors.New("no more than 35 streamers can be fetched at once")
	}

	var payload []TwitchPayload
	for _, streamer := range streamers {
		tmp := TwitchPayload{
			"operationName": "ChannelRoot_AboutPanel",
			"variables": map[string]interface{}{
				"channelLogin": streamer,
				"skipSchedule": false,
			},
			"extensions": map[string]interface{}{
				"persistedQuery": map[string]interface{}{
					"version":    1,
					"sha256Hash": "6089531acef6c09ece01b440c41978f4c8dc60cb4fa0124c9a9d3f896709b6c6",
				},
			},
		}

		payload = append(payload, tmp)
	}

	_, body, err := parseResponse(payload)
	if err != nil {
		return []structs.FollowingStreamer{}, err
	}

	var parsedFollowingStreamers []structs.FollowingStreamer

	// parse the data from all of the segments before
	for i := 0; i < len(streamers); i++ {
		data := gjson.Get(string(body), extractor.GenGjsonQuery(i, ".data"))
		parsed := ParseFollowingStreamer(data, streamers[i])
		parsedFollowingStreamers = append(parsedFollowingStreamers, parsed)
	}

	return parsedFollowingStreamers, nil
}