feat: refactor materialization logic to group static routes by community in the refresh pipeline. Introduce a new structure for managing static routes, enhancing the handling of IPv4 and IPv6 routes while preserving community associations. Update related functions to support the new grouping mechanism.

internal/pipeline/refresh.go

@@ -163,17 +163,10 @@ func collectModulePrefixRows(ctx context.Context, st store.Backend, hc *http.Cli
 			if err != nil {
 				return nil, err
 			}
-			if strings.TrimSpace(src.Etag) != "" {
-				req.Header.Set("If-None-Match", strings.TrimSpace(src.Etag))
-			}
 			resp, err := hc.Do(req)
 			if err != nil {
 				return nil, fmt.Errorf("cdn fetch %s: %w", u, err)
 			}
-			if resp.StatusCode == http.StatusNotModified {
-				_ = resp.Body.Close()
-				continue
-			}
 			if resp.StatusCode != http.StatusOK {
 				_, _ = io.Copy(io.Discard, resp.Body)
 				_ = resp.Body.Close()
@@ -674,7 +667,7 @@ func hashAggregatedMaterialization(tenantID string, rows []store.PrefixRow) stri
 }
 
 func buildPreviewFragments(st store.Backend, tenantID, moduleID, revisionID string, rows []store.PrefixRow) (map[string]string, error) {
-	v4, v6, pathASNs, sr4, sr6, err := materializeRowsForBird(st, tenantID, rows)
+	v4, v6, pathASNs, staticGroups, err := materializeRowsForBird(st, tenantID, rows)
 	if err != nil {
 		return nil, err
 	}
@@ -686,8 +679,7 @@ func buildPreviewFragments(st store.Backend, tenantID, moduleID, revisionID stri
 	if err != nil {
 		return nil, err
 	}
-	staticV4 := birdfmt.RenderStaticIPv4Routes("evobgp_prefixes_v4", sr4)
-	staticV6 := birdfmt.RenderStaticIPv6Routes("evobgp_prefixes_v6", sr6)
+	staticV4, staticV6 := renderStaticProtocolsByCommunity(staticGroups)
 
 	locals := birdLocalsFromStore(st, tenantID)
 	tplBody, err := birdfmt.RenderBGPTemplates(birdfmt.BGPTemplatesOptions{
@@ -732,6 +724,42 @@ func buildPreviewFragments(st store.Backend, tenantID, moduleID, revisionID stri
 	return out, nil
 }
 
+func renderStaticProtocolsByCommunity(groups []staticCommunityRoutes) (string, string) {
+	var b4 strings.Builder
+	var b6 strings.Builder
+	for _, grp := range groups {
+		nameSuffix := communityProtocolSuffix(grp.CommunityID)
+		if len(grp.RoutesV4) > 0 {
+			b4.WriteString(birdfmt.RenderStaticIPv4Routes("evobgp_prefixes_v4_"+nameSuffix, grp.RoutesV4))
+		}
+		if len(grp.RoutesV6) > 0 {
+			b6.WriteString(birdfmt.RenderStaticIPv6Routes("evobgp_prefixes_v6_"+nameSuffix, grp.RoutesV6))
+		}
+	}
+	return b4.String(), b6.String()
+}
+
+func communityProtocolSuffix(communityID string) string {
+	raw := strings.TrimSpace(communityID)
+	if raw == "" {
+		return "default"
+	}
+	var b strings.Builder
+	b.Grow(len(raw))
+	for _, r := range raw {
+		if (r >= 'a' && r <= 'z') || (r >= 'A' && r <= 'Z') || (r >= '0' && r <= '9') {
+			b.WriteRune(r)
+			continue
+		}
+		b.WriteByte('_')
+	}
+	out := strings.Trim(b.String(), "_")
+	if out == "" {
+		return "default"
+	}
+	return "c_" + out
+}
+
 type birdLocals struct {
 	routerID string
 	localV4  string