func ConfigFromJSON()

in google/google.go [38:75]

• 38 lines of code
• 5 McCabe index (conditional complexity)

func ConfigFromJSON(jsonKey []byte, scope ...string) (*oauth2.Config, error) {
	type cred struct {
		ClientID     string   `json:"client_id"`
		ClientSecret string   `json:"client_secret"`
		RedirectURIs []string `json:"redirect_uris"`
		AuthURI      string   `json:"auth_uri"`
		TokenURI     string   `json:"token_uri"`
	}
	var j struct {
		Web       *cred `json:"web"`
		Installed *cred `json:"installed"`
	}
	if err := json.Unmarshal(jsonKey, &j); err != nil {
		return nil, err
	}
	var c *cred
	switch {
	case j.Web != nil:
		c = j.Web
	case j.Installed != nil:
		c = j.Installed
	default:
		return nil, fmt.Errorf("oauth2/google: no credentials found")
	}
	if len(c.RedirectURIs) < 1 {
		return nil, errors.New("oauth2/google: missing redirect URL in the client_credentials.json")
	}
	return &oauth2.Config{
		ClientID:     c.ClientID,
		ClientSecret: c.ClientSecret,
		RedirectURL:  c.RedirectURIs[0],
		Scopes:       scope,
		Endpoint: oauth2.Endpoint{
			AuthURL:  c.AuthURI,
			TokenURL: c.TokenURI,
		},
	}, nil
}