feat(protonvpn): feature filters (#2182)

- `SECURE_CORE_ONLY`
- `TOR_ONLY`
- `P2P_ONLY`

internal/provider/utils/filtering.go

@@ -57,6 +57,18 @@ func filterServer(server models.Server,
 		return true
 	}
 
+	if *selection.SecureCoreOnly && !server.SecureCore {
+		return true
+	}
+
+	if *selection.TorOnly && !server.Tor {
+		return true
+	}
+
+	if *selection.P2POnly && !server.P2P {
+		return true
+	}
+
 	if filterByPossibilities(server.Country, selection.Countries) {
 		return true
 	}

internal/provider/utils/filtering_test.go

@@ -115,6 +115,45 @@ func Test_FilterServers(t *testing.T) {
 				{Stream: true, VPN: vpn.OpenVPN, UDP: true},
 			},
 		},
+		"filter by secure core only": {
+			selection: settings.ServerSelection{
+				SecureCoreOnly: boolPtr(true),
+			}.WithDefaults(providers.Protonvpn),
+			servers: []models.Server{
+				{SecureCore: false, VPN: vpn.OpenVPN, UDP: true},
+				{SecureCore: true, VPN: vpn.OpenVPN, UDP: true},
+				{SecureCore: false, VPN: vpn.OpenVPN, UDP: true},
+			},
+			filtered: []models.Server{
+				{SecureCore: true, VPN: vpn.OpenVPN, UDP: true},
+			},
+		},
+		"filter by tor only": {
+			selection: settings.ServerSelection{
+				TorOnly: boolPtr(true),
+			}.WithDefaults(providers.Protonvpn),
+			servers: []models.Server{
+				{Tor: false, VPN: vpn.OpenVPN, UDP: true},
+				{Tor: true, VPN: vpn.OpenVPN, UDP: true},
+				{Tor: false, VPN: vpn.OpenVPN, UDP: true},
+			},
+			filtered: []models.Server{
+				{Tor: true, VPN: vpn.OpenVPN, UDP: true},
+			},
+		},
+		"filter by P2P only": {
+			selection: settings.ServerSelection{
+				P2POnly: boolPtr(true),
+			}.WithDefaults(providers.Protonvpn),
+			servers: []models.Server{
+				{P2P: false, VPN: vpn.OpenVPN, UDP: true},
+				{P2P: true, VPN: vpn.OpenVPN, UDP: true},
+				{P2P: false, VPN: vpn.OpenVPN, UDP: true},
+			},
+			filtered: []models.Server{
+				{P2P: true, VPN: vpn.OpenVPN, UDP: true},
+			},
+		},
 		"filter by owned": {
 			selection: settings.ServerSelection{
 				OwnedOnly: boolPtr(true),