sync

internal/api/client.go

@@ -0,0 +1,121 @@
+package api
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"net/url"
+	"time"
+
+	"golang.org/x/time/rate"
+)
+
+// Client handles communication with the Garmin Connect API
+type Client struct {
+	baseURL    *url.URL
+	httpClient *http.Client
+	limiter    *rate.Limiter
+	logger     Logger
+}
+
+// NewClient creates a new API client
+func NewClient(baseURL string, httpClient *http.Client) (*Client, error) {
+	u, err := url.Parse(baseURL)
+	if err != nil {
+		return nil, fmt.Errorf("invalid base URL: %w", err)
+	}
+
+	if httpClient == nil {
+		httpClient = http.DefaultClient
+	}
+
+	return &Client{
+		baseURL:    u,
+		httpClient: httpClient,
+		limiter:    rate.NewLimiter(rate.Every(time.Second/10), 10), // 10 requests per second
+		logger:     &stdLogger{},
+	}, nil
+}
+
+// SetLogger sets the client's logger
+func (c *Client) SetLogger(logger Logger) {
+	c.logger = logger
+}
+
+// SetRateLimit configures the rate limiter
+func (c *Client) SetRateLimit(interval time.Duration, burst int) {
+	c.limiter = rate.NewLimiter(rate.Every(interval), burst)
+}
+
+// Get performs a GET request
+func (c *Client) Get(ctx context.Context, path string, v interface{}) error {
+	return c.doRequest(ctx, http.MethodGet, path, nil, v)
+}
+
+// Post performs a POST request
+func (c *Client) Post(ctx context.Context, path string, body io.Reader, v interface{}) error {
+	return c.doRequest(ctx, http.MethodPost, path, body, v)
+}
+
+func (c *Client) doRequest(ctx context.Context, method, path string, body io.Reader, v interface{}) error {
+	// Wait for rate limiter
+	if err := c.limiter.Wait(ctx); err != nil {
+		return fmt.Errorf("rate limit wait failed: %w", err)
+	}
+
+	// Create request
+	u := c.baseURL.ResolveReference(&url.URL{Path: path})
+	req, err := http.NewRequestWithContext(ctx, method, u.String(), body)
+	if err != nil {
+		return fmt.Errorf("create request failed: %w", err)
+	}
+
+	// Set headers
+	req.Header.Set("Accept", "application/json")
+	if body != nil {
+		req.Header.Set("Content-Type", "application/json")
+	}
+
+	c.logger.Debugf("Request: %s %s", method, u.String())
+
+	// Execute request
+	resp, err := c.httpClient.Do(req)
+	if err != nil {
+		return fmt.Errorf("request failed: %w", err)
+	}
+	defer resp.Body.Close()
+
+	c.logger.Debugf("Response status: %s", resp.Status)
+
+	// Handle non-200 responses
+	if resp.StatusCode < 200 || resp.StatusCode >= 300 {
+		return fmt.Errorf("unexpected status code: %d", resp.StatusCode)
+	}
+
+	// Parse response
+	if v == nil {
+		return nil
+	}
+
+	if err := json.NewDecoder(resp.Body).Decode(v); err != nil {
+		return fmt.Errorf("decode response failed: %w", err)
+	}
+
+	return nil
+}
+
+// Logger defines the logging interface for the client
+type Logger interface {
+	Debugf(format string, args ...interface{})
+	Infof(format string, args ...interface{})
+	Errorf(format string, args ...interface{})
+}
+
+// stdLogger is the default logger that uses the standard log package
+type stdLogger struct{}
+
+func (l *stdLogger) Debugf(format string, args ...interface{}) {}
+func (l *stdLogger) Infof(format string, args ...interface{})  {}
+func (l *stdLogger) Errorf(format string, args ...interface{}) {}