feat: publish standalone worker

Separate worker packaging and service lifecycle from the control plane.

internal/notifyrender/get_content.go

@@ -0,0 +1,98 @@
+// Package notifyrender owns the subject/body templates used by both the
+// legacy sender (internal/sender) and the worker-driven notification
+// producer (internal/notifier). It is a leaf package so the notifier package
+// can pre-render notification content for the worker without importing the
+// sender package, which would otherwise create an import cycle (sender's
+// tests already import notifier to drive the legacy loop).
+package notifyrender
+
+import (
+	"bytes"
+	"strings"
+	"time"
+
+	"github.com/russross/blackfriday/v2"
+
+	"rsgit.ru/rsmon/rsmon/app/models"
+)
+
+const (
+	stateDown = "down"
+	stateUp   = "up"
+	stateTest = "test"
+	stateExp  = "exp"
+)
+
+// GetContent pre-renders subject + bodies for one Message using the same
+// templates the legacy sender used to apply at delivery time. The result is
+// what the worker binary consumes directly so it does not need access to
+// Message/Event rows, workdays, or NotificationDayStart logic on the data plane.
+//
+// Returns the four bodies (subject, text, markdown, html). The caller is
+// responsible for passing them through to the worker task payload.
+func GetContent(message *models.Message, tn time.Time) (bytes.Buffer, bytes.Buffer, bytes.Buffer, bytes.Buffer) {
+	var subject, textBody, markdownBody, htmlBody bytes.Buffer
+
+	if message.Kind == stateTest {
+		subject.WriteString("тестовое сообщение от rsmon.ru")
+		textBody.WriteString("тестовое сообщение от rsmon.ru")
+		markdownBody.WriteString("#### тестовое сообщение от rsmon.ru")
+		htmlBody.WriteString("<h4>тестовое сообщение от rsmon.ru</h4>")
+
+		return subject, textBody, markdownBody, htmlBody
+	}
+
+	if message.Kind == stateExp {
+		if len(message.Events) > 0 {
+			panic("exp message with events")
+		}
+		if message.Check == nil {
+			panic("exp message with no check")
+		}
+		return TextExpires(message.Check)
+	}
+
+	if message.Check != nil {
+		panic("up/down message with check")
+	}
+
+	if len(message.Events) == 1 {
+		event := message.Events[0]
+		switch message.Kind {
+		case stateDown:
+			return TextDownOne(&event)
+		case stateUp:
+			return TextUpOne(&event)
+		default:
+			panic("bad message kind " + message.Kind)
+		}
+	}
+	switch message.Kind {
+	case stateDown:
+		subject.WriteString(GetDownMany(len(message.Events)))
+	case stateUp:
+		subject.WriteString(GetUpMany(len(message.Events)))
+	default:
+		panic("bad message kind" + message.Kind)
+	}
+	names := []string{}
+	for _, evt := range message.Events { //nolint:gocritic // range copy is acceptable here
+		names = append(names, evt.Monitor.GetLabel())
+	}
+	subject.WriteString(": ")
+	subject.WriteString(strings.Join(names, ", "))
+
+	asciiTable, markdownTable := RenderEventsTable(message, tn)
+
+	textBody.WriteString(subject.String() + "\n")
+	textBody.WriteString(asciiTable)
+
+	markdownBody.WriteString("###### " + subject.String() + "\n\n")
+	markdownBody.WriteString(markdownTable)
+
+	htmlTable := blackfriday.Run([]byte(markdownTable))
+	htmlBody.WriteString("<h4>Изменения статусов по мониторам:</h4>")
+	htmlBody.Write(htmlTable)
+
+	return subject, textBody, markdownBody, htmlBody
+}