Initial release

client.go

@@ -0,0 +1,83 @@
+package sendamatic
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"time"
+)
+
+const (
+	defaultBaseURL = "https://send.api.sendamatic.net"
+	defaultTimeout = 30 * time.Second
+)
+
+type Client struct {
+	apiKey     string
+	baseURL    string
+	httpClient *http.Client
+}
+
+func NewClient(userID, password string, opts ...Option) *Client {
+	c := &Client{
+		apiKey:  fmt.Sprintf("%s-%s", userID, password),
+		baseURL: defaultBaseURL,
+		httpClient: &http.Client{
+			Timeout: defaultTimeout,
+		},
+	}
+
+	// Optionen anwenden
+	for _, opt := range opts {
+		opt(c)
+	}
+
+	return c
+}
+
+// Send versendet eine E-Mail über die Sendamatic API
+func (c *Client) Send(ctx context.Context, msg *Message) (*SendResponse, error) {
+	if err := msg.Validate(); err != nil {
+		return nil, fmt.Errorf("message validation failed: %w", err)
+	}
+
+	payload, err := json.Marshal(msg)
+	if err != nil {
+		return nil, fmt.Errorf("failed to marshal message: %w", err)
+	}
+
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, c.baseURL+"/send", bytes.NewReader(payload))
+	if err != nil {
+		return nil, fmt.Errorf("failed to create request: %w", err)
+	}
+
+	req.Header.Set("Content-Type", "application/json")
+	req.Header.Set("x-api-key", c.apiKey)
+
+	resp, err := c.httpClient.Do(req)
+	if err != nil {
+		return nil, fmt.Errorf("request failed: %w", err)
+	}
+	defer resp.Body.Close()
+
+	body, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return nil, fmt.Errorf("failed to read response: %w", err)
+	}
+
+	// Fehlerbehandlung für 4xx und 5xx
+	if resp.StatusCode >= 400 {
+		return nil, parseErrorResponse(resp.StatusCode, body)
+	}
+
+	var sendResp SendResponse
+	if err := json.Unmarshal(body, &sendResp.Recipients); err != nil {
+		return nil, fmt.Errorf("failed to unmarshal response: %w", err)
+	}
+
+	sendResp.StatusCode = resp.StatusCode
+	return &sendResp, nil
+}