mondern slopify hand crafted code for the greater good.

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

provider.go

@@ -0,0 +1,27 @@
+package main
+
+import "fmt"
+
+// Provider defines the interface for GeoIP data sources.
+// Each provider knows how to fetch IPv4 CIDR blocks for a given country.
+type Provider interface {
+	// Name returns the human-readable name of this provider.
+	Name() string
+
+	// FetchCIDRs downloads and returns a slice of IPv4 CIDR strings
+	// for the given ISO 3166-1 alpha-2 country code (lowercase).
+	FetchCIDRs(countryCode string) ([]string, error)
+}
+
+// NewProvider creates a Provider by name.
+// Supported providers: "ipverse", "ipdeny"
+func NewProvider(name string) (Provider, error) {
+	switch name {
+	case "ipverse":
+		return &IPverseProvider{}, nil
+	case "ipdeny":
+		return &IPDenyProvider{}, nil
+	default:
+		return nil, fmt.Errorf("unknown provider %q (supported: ipverse, ipdeny)", name)
+	}
+}