Add zulip webhook

.env.example

@@ -3,4 +3,8 @@ ESI_CLIENT_ID=your-client-id
 ESI_REDIRECT_URI=http://localhost:3000/callback
 ESI_SCOPES=esi-planets.manage_planets.v1
 HTTP_SERVER_PORT=3000
-ESI_REFRESH_INTERVAL=P10M
+ESI_REFRESH_INTERVAL=P10M
+
+WEBHOOK_URL=https://your-webhook-url.com
+WEBHOOK_EMAIL=your-webhook-email
+WEBHOOK_TOKEN=your-webhook-token

webhook/webhook.go

@@ -0,0 +1,20 @@
+// Package webhook provides a generic webhook interface for sending messages
+// with channel, topic, and message parameters.
+package webhook
+
+import (
+	"time"
+)
+
+// WebhookMessage represents the structure of a webhook message
+type WebhookMessage struct {
+	Channel   string    `json:"channel"`
+	Topic     string    `json:"topic"`
+	Message   string    `json:"message"`
+	Timestamp time.Time `json:"timestamp"`
+}
+
+// WebhookInterface defines the contract for webhook operations
+type WebhookInterface interface {
+	Post(channel, topic, message string) error
+}

webhook/zulip.go

@@ -0,0 +1,66 @@
+// Package webhook provides Zulip webhook implementation
+package webhook
+
+import (
+	"fmt"
+	"net/http"
+	"net/url"
+	"strings"
+	"time"
+
+	logger "git.site.quack-lab.dev/dave/cylogger"
+)
+
+// ZulipWebhook implements WebhookInterface for Zulip
+type ZulipWebhook struct {
+	url    string
+	email  string
+	token  string
+	client *http.Client
+}
+
+// NewZulipWebhook creates a new Zulip webhook client
+func NewZulipWebhook(url, email, token string) *ZulipWebhook {
+	logger.Info("Zulip webhook client initialized with email: %s", email)
+
+	return &ZulipWebhook{
+		url:   url,
+		email: email,
+		token: token,
+		client: &http.Client{
+			Timeout: 30 * time.Second,
+		},
+	}
+}
+
+// Post sends a message to Zulip
+func (z *ZulipWebhook) Post(channel, topic, message string) error {
+	logger.Debug("Sending Zulip message to channel: %s, topic: %s", channel, topic)
+
+	data := url.Values{}
+	data.Set("type", "stream")
+	data.Set("to", channel)
+	data.Set("topic", topic)
+	data.Set("content", message)
+
+	req, err := http.NewRequest("POST", z.url, strings.NewReader(data.Encode()))
+	if err != nil {
+		return fmt.Errorf("failed to create zulip request: %w", err)
+	}
+
+	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
+	req.SetBasicAuth(z.email, z.token)
+
+	resp, err := z.client.Do(req)
+	if err != nil {
+		return fmt.Errorf("failed to send zulip message: %w", err)
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode < 200 || resp.StatusCode >= 300 {
+		return fmt.Errorf("zulip request failed with status: %d", resp.StatusCode)
+	}
+
+	logger.Info("Zulip message sent successfully to channel: %s, topic: %s", channel, topic)
+	return nil
+}