Add batch notification app identity types

internal/app/batch_notification.go

@@ -0,0 +1,62 @@
+package app
+
+import (
+	"fmt"
+	"time"
+
+	"gitea.maximumdirect.net/eric/weatherreporter/internal/config"
+	"gitea.maximumdirect.net/eric/weatherreporter/internal/timeutil"
+)
+
+const runIDTimestampLayout = "20060102T150405.000000000Z"
+
+type batchNotificationIdentity struct {
+	PipelineID     string
+	BundleID       string
+	IdempotencyKey string
+}
+
+func batchRunID(startedAt time.Time, batch BatchKind) string {
+	return startedAt.UTC().Format(runIDTimestampLayout) + "_" + string(batch)
+}
+
+func renderBatchNotificationIdentity(cfg config.Config, batch BatchKind, runID string, startedAt time.Time) (batchNotificationIdentity, error) {
+	values, err := batchNotificationTemplateValues(cfg, batch, runID, startedAt)
+	if err != nil {
+		return batchNotificationIdentity{}, err
+	}
+
+	bundleID, err := config.RenderDistributorBatchBundleID(cfg.Notify.Distributor.Batch.BundleIDTemplate, values)
+	if err != nil {
+		return batchNotificationIdentity{}, err
+	}
+	values.BundleID = bundleID
+
+	pipelineID, err := config.RenderDistributorBatchPipelineID(cfg.Notify.Distributor.Batch.PipelineIDTemplate, values)
+	if err != nil {
+		return batchNotificationIdentity{}, err
+	}
+	idempotencyKey, err := config.RenderDistributorBatchIdempotencyKey(cfg.Notify.Distributor.Batch.IdempotencyKeyTemplate, values)
+	if err != nil {
+		return batchNotificationIdentity{}, err
+	}
+
+	return batchNotificationIdentity{
+		PipelineID:     pipelineID,
+		BundleID:       bundleID,
+		IdempotencyKey: idempotencyKey,
+	}, nil
+}
+
+func batchNotificationTemplateValues(cfg config.Config, batch BatchKind, runID string, startedAt time.Time) (config.DistributorBatchTemplateValues, error) {
+	location, err := timeutil.LoadLocation(cfg.WeatherAPI.Timezone)
+	if err != nil {
+		return config.DistributorBatchTemplateValues{}, fmt.Errorf("load batch notification timezone: %w", err)
+	}
+	return config.DistributorBatchTemplateValues{
+		LocationID:       cfg.Location.ID,
+		Batch:            string(batch),
+		BatchRunID:       runID,
+		BatchStartedDate: startedAt.In(location).Format(timeutil.DateLayout),
+	}, nil
+}