1package invidious
  2
  3import (
  4	"fmt"
  5	"net/http"
  6	"regexp"
  7	"strconv"
  8	"time"
  9
 10	"github.com/sirupsen/logrus"
 11)
 12
 13const timeoutDuration = 10 * time.Minute
 14const maxSizeBytes = 20000000 // 20 MB
 15const instancesEndpoint = "https://api.invidious.io/instances.json?sort_by=api,type"
 16const videosEndpoint = "https://%s/api/v1/videos/%s?fields=videoId,title,description,author,lengthSeconds,size,formatStreams"
 17
 18var expireRegex = regexp.MustCompile(`(?i)expire=(\d+)`)
 19var logger = logrus.New()
 20
 21type Timeout struct {
 22	Instance  string
 23	Timestamp time.Time
 24}
 25
 26type Client struct {
 27	http     *http.Client
 28	timeouts []Timeout
 29	Instance string
 30}
 31
 32type Format struct {
 33	VideoId   string
 34	Name      string `json:"qualityLabel"`
 35	Height    int
 36	Width     int
 37	Url       string `json:"url"`
 38	Container string `json:"container"`
 39	Size      string `json:"size"`
 40}
 41
 42type Video struct {
 43	VideoId     string   `json:"videoId"`
 44	Title       string   `json:"title"`
 45	Description string   `json:"description"`
 46	Uploader    string   `json:"author"`
 47	Duration    int      `json:"lengthSeconds"`
 48	Formats     []Format `json:"formatStreams"`
 49	Timestamp   time.Time
 50	Expire      time.Time
 51}
 52
 53func filter[T any](ss []T, test func(T) bool) (ret []T) {
 54	for _, s := range ss {
 55		if test(s) {
 56			ret = append(ret, s)
 57		}
 58	}
 59	return
 60}
 61
 62func parseOrZero(number string) int {
 63	res, err := strconv.Atoi(number)
 64	if err != nil {
 65		return 0
 66	}
 67	return res
 68}
 69
 70type HTTPError struct {
 71	StatusCode int
 72}
 73
 74func (e HTTPError) Error() string {
 75	return fmt.Sprintf("HTTP error: %d", e.StatusCode)
 76}
 77
 78func (c *Client) GetVideo(videoId string, fromCache bool) (*Video, error) {
 79	logger.Info("Video https://youtu.be/", videoId, " was requested.")
 80
 81	var video *Video
 82	var err error
 83
 84	if fromCache {
 85		video, err = GetVideoDB(videoId)
 86		if err == nil {
 87			logger.Info("Found a valid cache entry.")
 88			return video, nil
 89		}
 90	}
 91
 92	video, httpErr := c.fetchVideo(videoId)
 93
 94	switch httpErr {
 95	case http.StatusOK:
 96		logger.Info("Retrieved by API.")
 97		break
 98	case http.StatusNotFound:
 99		logger.Debug("Video does not exist or can't be retrieved.")
100		return nil, err
101	default:
102		fallthrough
103	case http.StatusInternalServerError:
104		err = c.NewInstance()
105		if err != nil {
106			logger.Error("Could not get a new instance: ", err)
107			time.Sleep(10 * time.Second)
108		}
109		return c.GetVideo(videoId, true)
110	}
111
112	err = CacheVideoDB(*video)
113	if err != nil {
114		logger.Warn("Could not cache video id: ", videoId)
115		logger.Warn(err)
116	}
117	return video, nil
118}
119
120func NewClient(httpClient *http.Client) *Client {
121	InitDB()
122	client := &Client{
123		http:     httpClient,
124		timeouts: []Timeout{},
125		Instance: "",
126	}
127	err := client.NewInstance()
128	if err != nil {
129		logger.Fatal(err)
130	}
131	return client
132}