mondern slopify hand crafted code for the greater good.

(move from user specified blocklist download URLs to simply country codes with multiple providers available.)

generator.go

@@ -0,0 +1,55 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"strings"
+	"time"
+)
+
+// CountryData holds the resolved CIDR blocks for a single country.
+type CountryData struct {
+	Code string   // ISO 3166-1 alpha-2 country code
+	Name string   // Display name for RouterOS comments
+	CIDRs []string // IPv4 CIDR blocks
+}
+
+// GenerateRSC produces a RouterOS .rsc script file that populates an address list.
+// The filename includes today's date, e.g. "CountryIPBlocks-2026-05-01.rsc".
+// Returns the generated filename.
+func GenerateRSC(countries []CountryData, listName string) (string, error) {
+	now := time.Now()
+	datedName := fmt.Sprintf("%s-%s", listName, now.Format("2006-01-02"))
+	filename := fmt.Sprintf("%s.rsc", datedName)
+
+	var b strings.Builder
+
+	// Header with metadata
+	b.WriteString(fmt.Sprintf("# RouterOS GeoIP Address List: %s\n", datedName))
+	b.WriteString(fmt.Sprintf("# Generated: %s\n", now.UTC().Format(time.RFC3339)))
+	b.WriteString(fmt.Sprintf("# Countries: %d\n", len(countries)))
+
+	totalCIDRs := 0
+	for _, c := range countries {
+		totalCIDRs += len(c.CIDRs)
+	}
+	b.WriteString(fmt.Sprintf("# Total entries: %d\n", totalCIDRs))
+	b.WriteString("#\n")
+
+	// Each run creates a uniquely-named list (e.g. CountryIPBlocks-2026-05-01).
+	// Workflow: import this file, then atomically swap your firewall rules to
+	// reference the new list, then remove the old dated list.
+	b.WriteString("/ip firewall address-list\n")
+
+	for _, country := range countries {
+		for _, cidr := range country.CIDRs {
+			b.WriteString(fmt.Sprintf("add address=%s comment=\"%s\" list=%s\n", cidr, country.Name, datedName))
+		}
+	}
+
+	if err := os.WriteFile(filename, []byte(b.String()), os.ModePerm); err != nil {
+		return "", fmt.Errorf("failed to write file %q: %v", filename, err)
+	}
+
+	return filename, nil
+}