feat(provider): add provider configuration

internal/client/client.go

@@ -0,0 +1,68 @@
+package client
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"net/url"
+	"time"
+)
+
+type Client struct {
+	baseURI    *url.URL
+	headers    *http.Header
+	httpClient *http.Client
+}
+
+func NewClient(baseURL *url.URL, apiToken string) *Client {
+	return &Client{
+		baseURI: baseURL,
+		headers: &http.Header{
+			"Accept":        {"application/json"},
+			"Authorization": {fmt.Sprintf("token %s", apiToken)},
+			"Content-Type":  {"application/json"},
+		},
+		httpClient: &http.Client{
+			Timeout: time.Minute,
+		},
+	}
+}
+
+func (c *Client) Send(ctx context.Context, method string, uriRef *url.URL, payload any, response any) error {
+	uri := c.baseURI.ResolveReference(uriRef)
+
+	var payloadReader io.Reader
+	if payload != nil {
+		if body, err := json.Marshal(payload); err != nil {
+			return fmt.Errorf("cannot marshal payload: %w", err)
+		} else {
+			payloadReader = bytes.NewReader(body)
+		}
+	}
+
+	req, err := http.NewRequestWithContext(ctx, method, uri.String(), payloadReader)
+	if err != nil {
+		return fmt.Errorf("cannot create request: %w", err)
+	}
+	req.Header = *c.headers
+
+	resp, err := c.httpClient.Do(req)
+	if err != nil {
+		return fmt.Errorf("cannot send request: %w", err)
+	}
+	defer resp.Body.Close()
+	body, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return fmt.Errorf("cannot read response body: %w", err)
+	}
+	if resp.StatusCode < 200 || resp.StatusCode >= 300 {
+		return fmt.Errorf("non 2XX status code received: %d, %q", resp.StatusCode, body)
+	}
+	if err = json.Unmarshal(body, response); err != nil {
+		return fmt.Errorf("response body unmarshal failed: %w", err)
+	}
+	return nil
+}