bskyweb additions (#296)

Add some minor bskyweb improvements, Mailmodo endpoint, Dockerfile for bskyweb, container image push

bskyweb/cmd/bskyweb/mailmodo.go

@@ -0,0 +1,68 @@
+package main
+
+import (
+	"bytes"
+	"context"
+	"crypto/sha256"
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"time"
+)
+
+type Mailmodo struct {
+	httpClient *http.Client
+	APIKey     string
+	BaseURL    string
+}
+
+func NewMailmodo(apiKey string) *Mailmodo {
+	return &Mailmodo{
+		APIKey:     apiKey,
+		BaseURL:    "https://api.mailmodo.com/api/v1",
+		httpClient: &http.Client{},
+	}
+}
+
+func (m *Mailmodo) request(ctx context.Context, httpMethod string, apiMethod string, data any) error {
+	endpoint := fmt.Sprintf("%s/%s", m.BaseURL, apiMethod)
+	js, err := json.Marshal(data)
+	if err != nil {
+		return fmt.Errorf("Mailmodo JSON encoding failed: %w", err)
+	}
+	req, err := http.NewRequestWithContext(ctx, httpMethod, endpoint, bytes.NewBuffer(js))
+	if err != nil {
+		return fmt.Errorf("Mailmodo HTTP creating request %s %s failed: %w", httpMethod, apiMethod, err)
+	}
+	req.Header.Set("mmApiKey", m.APIKey)
+	req.Header.Set("Content-Type", "application/json")
+
+	res, err := m.httpClient.Do(req)
+	if err != nil {
+		return fmt.Errorf("Mailmodo HTTP making request %s %s failed: %w", httpMethod, apiMethod, err)
+	}
+	defer res.Body.Close()
+
+	status := struct {
+		Success bool   `json:"success"`
+		Message string `json:"message"`
+	}{}
+	if err := json.NewDecoder(res.Body).Decode(&status); err != nil {
+		return fmt.Errorf("Mailmodo HTTP parsing response %s %s failed: %w", httpMethod, apiMethod, err)
+	}
+	if !status.Success {
+		return fmt.Errorf("Mailmodo API response %s %s failed: %s", httpMethod, apiMethod, status.Message)
+	}
+	return nil
+}
+
+func (m *Mailmodo) AddToList(ctx context.Context, listName, email string) error {
+	return m.request(ctx, "POST", "addToList", map[string]any{
+		"listName": listName,
+		"email":    email,
+		"data": map[string]any{
+			"email_hashed": fmt.Sprintf("%x", sha256.Sum256([]byte(email))),
+		},
+		"created_at": time.Now().UTC().Format(time.RFC3339),
+	})
+}