69 lines
1.8 KiB
Go
69 lines
1.8 KiB
Go
package auth
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import (
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"context"
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"fmt"
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"os"
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"time"
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"golang.org/x/oauth2"
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"golang.org/x/oauth2/google"
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"google.golang.org/api/healthcare/v1"
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"google.golang.org/api/option"
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)
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// GoogleClient handles authentication with Google APIs
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type GoogleClient struct {
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credentialsPath string
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tokenSource oauth2.TokenSource
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}
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// NewGoogleClient creates a new Google authentication client
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func NewGoogleClient(credentialsPath string) (*GoogleClient, error) {
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client := &GoogleClient{
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credentialsPath: credentialsPath,
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}
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// Initialize on creation to validate credentials
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ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
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defer cancel()
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// Try reading the credentials file
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credBytes, err := os.ReadFile(credentialsPath)
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if err != nil {
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return nil, fmt.Errorf("failed to read credentials file: %w", err)
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}
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// Create credentials from the JSON key file
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creds, err := google.CredentialsFromJSON(ctx, credBytes, healthcare.CloudPlatformScope)
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if err != nil {
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return nil, fmt.Errorf("failed to initialize Google client: %w", err)
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}
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client.tokenSource = creds.TokenSource
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return client, nil
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}
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// GetAccessToken returns a valid access token for Google APIs
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func (c *GoogleClient) GetAccessToken() (string, error) {
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_, cancel := context.WithTimeout(context.Background(), 10*time.Second)
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defer cancel()
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token, err := c.tokenSource.Token()
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if err != nil {
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return "", fmt.Errorf("failed to get access token: %w", err)
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}
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return token.AccessToken, nil
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}
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// GetHealthcareClient returns a configured Healthcare API client
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func (c *GoogleClient) GetHealthcareClient(ctx context.Context) (*healthcare.Service, error) {
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opts := []option.ClientOption{
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option.WithCredentialsFile(c.credentialsPath),
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option.WithScopes(healthcare.CloudPlatformScope),
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}
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return healthcare.NewService(ctx, opts...)
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}
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