Initial add backend stuff

snailmail/cloudflare.go

@@ -0,0 +1,89 @@
+package snailmail
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"io"
+	"log"
+	"net/http"
+)
+
+type cloudflareSender struct{}
+
+type cfEmailRequest struct {
+	To      string `json:"to"`
+	From    string `json:"from"`
+	Subject string `json:"subject"`
+	HTML    string `json:"html,omitempty"`
+	Text    string `json:"text,omitempty"`
+}
+
+type cfEmailResponse struct {
+	Success bool `json:"success"`
+	Errors  []struct {
+		Code    int    `json:"code"`
+		Message string `json:"message"`
+	} `json:"errors"`
+}
+
+func (c *cloudflareSender) Send(message Email, mailtype int) error {
+	if len(message.Recipients) == 0 {
+		return fmt.Errorf("cloudflare email: no recipients")
+	}
+
+	req := cfEmailRequest{
+		To:      message.Recipients[0],
+		From:    settings.Cloudflare.FromAddress,
+		Subject: message.Subject,
+	}
+
+	if mailtype == TYPE_HTML {
+		req.HTML = message.Body.String()
+	} else {
+		req.Text = message.Body.String()
+	}
+
+	body, err := json.Marshal(req)
+	if err != nil {
+		return fmt.Errorf("cloudflare email: failed to marshal request: %w", err)
+	}
+
+	url := fmt.Sprintf("https://api.cloudflare.com/client/v4/accounts/%s/email/sending/send", settings.Cloudflare.AccountID)
+
+	httpReq, err := http.NewRequest("POST", url, bytes.NewReader(body))
+	if err != nil {
+		return fmt.Errorf("cloudflare email: failed to create request: %w", err)
+	}
+
+	httpReq.Header.Set("Authorization", "Bearer "+settings.Cloudflare.APIToken)
+	httpReq.Header.Set("Content-Type", "application/json")
+
+	resp, err := http.DefaultClient.Do(httpReq)
+	if err != nil {
+		log.Println("cloudflare email: request failed:", err)
+		return fmt.Errorf("cloudflare email: request failed: %w", err)
+	}
+	defer resp.Body.Close()
+
+	respBody, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return fmt.Errorf("cloudflare email: failed to read response: %w", err)
+	}
+
+	var cfResp cfEmailResponse
+	if err := json.Unmarshal(respBody, &cfResp); err != nil {
+		return fmt.Errorf("cloudflare email: failed to parse response: %w", err)
+	}
+
+	if !cfResp.Success {
+		errMsg := "unknown error"
+		if len(cfResp.Errors) > 0 {
+			errMsg = cfResp.Errors[0].Message
+		}
+		log.Printf("cloudflare email: send failed: %s (HTTP %d)", errMsg, resp.StatusCode)
+		return fmt.Errorf("cloudflare email: %s", errMsg)
+	}
+
+	return nil
+}