1 files changed, 119 insertions, 0 deletions
diff --git a/internal/client/client.go b/internal/client/client.go
new file mode 100644
index 0000000..098479f
--- /dev/null
+++ b/internal/client/client.go
@@ -0,0 +1,119 @@
+package client
+
+import (
+	"bytes"
+	"dborg/internal/config"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"net/url"
+	"time"
+)
+
+type Client struct {
+	config     *config.Config
+	httpClient *http.Client
+}
+
+func New(cfg *config.Config) (*Client, error) {
+	if err := cfg.Validate(); err != nil {
+		return nil, err
+	}
+
+	return &Client{
+		config: cfg,
+		httpClient: &http.Client{
+			Timeout: cfg.Timeout,
+		},
+	}, nil
+}
+
+func (c *Client) doRequest(method, path string, params url.Values, body interface{}) ([]byte, error) {
+	fullURL := c.config.BaseURL + path
+	if params != nil && len(params) > 0 {
+		fullURL += "?" + params.Encode()
+	}
+
+	var reqBody io.Reader
+	if body != nil {
+		jsonData, err := json.Marshal(body)
+		if err != nil {
+			return nil, fmt.Errorf("failed to marshal request body: %w", err)
+		}
+		reqBody = bytes.NewBuffer(jsonData)
+	}
+
+	req, err := http.NewRequest(method, fullURL, reqBody)
+	if err != nil {
+		return nil, fmt.Errorf("failed to create request: %w", err)
+	}
+
+	req.Header.Set("X-API-Key", c.config.APIKey)
+	req.Header.Set("User-Agent", c.config.UserAgent)
+	if body != nil {
+		req.Header.Set("Content-Type", "application/json")
+	}
+
+	var resp *http.Response
+	var lastErr error
+
+	for attempt := 0; attempt <= c.config.MaxRetries; attempt++ {
+		if attempt > 0 {
+			time.Sleep(time.Duration(attempt) * time.Second)
+		}
+
+		resp, err = c.httpClient.Do(req)
+		if err != nil {
+			lastErr = err
+			continue
+		}
+
+		defer resp.Body.Close()
+
+		if resp.StatusCode == http.StatusOK || resp.StatusCode == http.StatusCreated {
+			return io.ReadAll(resp.Body)
+		}
+
+		bodyBytes, _ := io.ReadAll(resp.Body)
+
+		switch resp.StatusCode {
+		case http.StatusForbidden:
+			lastErr = fmt.Errorf("access denied (403): %s - This endpoint requires premium access", string(bodyBytes))
+		case http.StatusUnauthorized:
+			lastErr = fmt.Errorf("unauthorized (401): %s - Check your API key", string(bodyBytes))
+		case http.StatusTooManyRequests:
+			lastErr = fmt.Errorf("rate limit exceeded (429): %s", string(bodyBytes))
+		case http.StatusBadRequest:
+			lastErr = fmt.Errorf("bad request (400): %s", string(bodyBytes))
+		default:
+			lastErr = fmt.Errorf("API request failed with status %d: %s", resp.StatusCode, string(bodyBytes))
+		}
+
+		if resp.StatusCode != http.StatusTooManyRequests && resp.StatusCode < 500 {
+			break
+		}
+	}
+
+	return nil, lastErr
+}
+
+func (c *Client) Get(path string, params url.Values) ([]byte, error) {
+	return c.doRequest(http.MethodGet, path, params, nil)
+}
+
+func (c *Client) Post(path string, body interface{}) ([]byte, error) {
+	return c.doRequest(http.MethodPost, path, nil, body)
+}
+
+func (c *Client) Delete(path string) ([]byte, error) {
+	return c.doRequest(http.MethodDelete, path, nil, nil)
+}
+
+func (c *Client) Patch(path string, body interface{}) ([]byte, error) {
+	return c.doRequest(http.MethodPatch, path, nil, body)
+}
+
+func (c *Client) Put(path string, body interface{}) ([]byte, error) {
+	return c.doRequest(http.MethodPut, path, nil, body)
+}