backend code

server/twitch/client.go

@@ -0,0 +1,86 @@
+package twitch
+
+import (
+	"encoding/json"
+	"io"
+	"net/http"
+	"time"
+)
+
+const twitchAPIURL = "https://api.twitch.tv/helix"
+
+type Client struct {
+	authenticationManager AuthenticationManager
+}
+
+func NewTwitchClient(am *AuthenticationManager) *Client {
+	return &Client{
+		authenticationManager: *am,
+	}
+}
+
+type streamResp struct {
+	Data []struct {
+		ID        string `json:"id"`
+		UserName  string `json:"user_name"`
+		Title     string `json:"title"`
+		GameName  string `json:"game_name"`
+		StartedAt string `json:"started_at"`
+	} `json:"data"`
+}
+
+func (c *Client) doRequest(endpoint string, params map[string]string) ([]byte, error) {
+	token, err := c.authenticationManager.GetAccessToken()
+	if err != nil {
+		return nil, err
+	}
+
+	reqURL := twitchAPIURL + endpoint
+	req, err := http.NewRequest("GET", reqURL, nil)
+	if err != nil {
+		return nil, err
+	}
+
+	q := req.URL.Query()
+	for k, v := range params {
+		q.Set(k, v)
+	}
+	req.URL.RawQuery = q.Encode()
+
+	req.Header.Set("Client-Id", c.authenticationManager.GetClientId())
+	req.Header.Set("Authorization", "Bearer "+token.Token)
+
+	resp, err := http.DefaultClient.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+
+	return io.ReadAll(resp.Body)
+}
+
+func (c *Client) PollStream(channel string, liveChannel chan<- *StreamInfo) error {
+	body, err := c.doRequest("/streams", map[string]string{"user_login": channel})
+	if err != nil {
+		return err
+	}
+
+	var sr streamResp
+	if err := json.Unmarshal(body, &sr); err != nil {
+		return err
+	}
+
+	s := sr.Data[0]
+	started, _ := time.Parse(time.RFC3339, s.StartedAt)
+
+	liveChannel <- &StreamInfo{
+		ID:        s.ID,
+		UserName:  s.UserName,
+		Title:     s.Title,
+		GameName:  s.GameName,
+		StartedAt: started,
+		IsLive:    true,
+	}
+
+	return nil
+}