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package lib
import (
"crypto/rand"
"encoding/base64"
"encoding/json"
"fmt"
"io"
"net/http"
"net/url"
"os/exec"
"runtime"
"strings"
"yato/config"
)
func GetNewCodeVerifier() (string, error) {
bytes := make([]byte, 100)
_, err := rand.Read(bytes)
if err != nil {
return "", fmt.Errorf("failed to generate code verifier: %w", err)
}
encoded := base64.RawURLEncoding.EncodeToString(bytes)
// Truncate to 128 characters
if len(encoded) > 128 {
encoded = encoded[:128]
}
return encoded, nil
}
func GetOAuthURL(codeVerifier string) string {
return fmt.Sprintf("%s?response_type=code&client_id=%s&redirect_uri=%s&code_challenge=%s&code_challenge_method=plain",
config.MALOAuthBaseURL, config.MALClientID, config.MALRedirectURI, codeVerifier)
}
func OpenBrowser(url string) error {
var err error
switch runtime.GOOS {
case "linux":
err = exec.Command("xdg-open", url).Start()
case "windows":
err = exec.Command("rundll32", "url.dll,FileProtocolHandler", url).Start()
case "darwin":
err = exec.Command("open", url).Start()
default:
err = fmt.Errorf("unsupported platform")
}
return err
}
func ExchangeToken(code, codeVerifier string) (*config.MyAnimeListConfig, error) {
data := url.Values{}
data.Set("grant_type", "authorization_code")
data.Set("client_id", config.MALClientID)
data.Set("client_secret", config.MALClientSecret)
data.Set("redirect_uri", config.MALRedirectURI)
data.Set("code", code)
if codeVerifier != "" {
data.Set("code_verifier", codeVerifier)
}
// POST request to MAL API
req, err := http.NewRequest("POST", "https://myanimelist.net/v1/oauth2/token", strings.NewReader(data.Encode()))
if err != nil {
return nil, fmt.Errorf("failed to create request: %w", err)
}
req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
client := &http.Client{}
resp, err := client.Do(req)
if err != nil {
return nil, fmt.Errorf("failed to send request: %w", err)
}
defer resp.Body.Close()
body, err := io.ReadAll(resp.Body)
if err != nil {
return nil, fmt.Errorf("failed to read response body: %w", err)
}
if resp.StatusCode != http.StatusOK {
return nil, fmt.Errorf("unexpected status code: %d", resp.StatusCode)
}
var malConfig config.MyAnimeListConfig
var tokenResponse struct {
TokenType string `json:"token_type"`
ExpiresIn int `json:"expires_in"`
AccessToken string `json:"access_token"`
RefreshToken string `json:"refresh_token"`
}
if err := json.Unmarshal(body, &tokenResponse); err != nil {
return nil, fmt.Errorf("failed to unmarshal response: %w", err)
}
malConfig.TokenType = tokenResponse.TokenType
malConfig.ExpiresIn = tokenResponse.ExpiresIn
malConfig.AccessToken = tokenResponse.AccessToken
malConfig.RefreshToken = tokenResponse.RefreshToken
return &malConfig, nil
}
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