Russia federal districts as country region codes. GeoIP2 and ISO 3166…

…-2:RU compatible

countries/regiongroups.go

@@ -58,13 +58,118 @@ var RegionGroups = map[string]string{
 	"us-va": "us-east",
 	"us-vt": "us-east",
 	"us-wv": "us-east",
+
+	// # Federal districts of Russia
+	// Sources list (lowest priority on top)
+	// - https://en.wikipedia.org/wiki/Federal_districts_of_Russia
+	// - https://ru.wikipedia.org/wiki/ISO_3166-2:RU
+	// - http://statoids.com/uru.html with updates https://en.wikipedia.org/wiki/Federal_districts_of_Russia#cite_note-15
+
+	// Dal'nevostochnyy (D) Far Eastern
+	"ru-amu": "ru-dfd", // Amur
+	"ru-bu":  "ru-dfd", // Buryat
+	"ru-chu": "ru-dfd", // Chukot
+	"ru-kam": "ru-dfd", // Kamchatka
+	"ru-kha": "ru-dfd", // Khabarovsk
+	"ru-mag": "ru-dfd", // Magadan
+	"ru-pri": "ru-dfd", // Primor'ye
+	"ru-sa":  "ru-dfd", // Sakha
+	"ru-sak": "ru-dfd", // Sakhalin
+	"ru-yev": "ru-dfd", // Yevrey
+	"ru-zab": "ru-dfd", // Zabaykal'ye
+
+	// Severo-Kavkazskiy' (K) North Caucasus
+	"ru-ce":  "ru-kfd", // Chechnya
+	"ru-da":  "ru-kfd", // Dagestan
+	"ru-in":  "ru-kfd", // Ingush
+	"ru-kb":  "ru-kfd", // Kabardin-Balkar
+	"ru-kc":  "ru-kfd", // Karachay-Cherkess
+	"ru-se":  "ru-kfd", // North Ossetia
+	"ru-sta": "ru-kfd", // Stavropol'
+
+	// Privolzhskiy (P) Volga
+	"ru-ba":  "ru-pfd", // Bashkortostan
+	"ru-cu":  "ru-pfd", // Chuvash
+	"ru-kir": "ru-pfd", // Kirov
+	"ru-me":  "ru-pfd", // Mariy-El
+	"ru-mo":  "ru-pfd", // Mordovia
+	"ru-niz": "ru-pfd", // Nizhegorod
+	"ru-ore": "ru-pfd", // Orenburg
+	"ru-pnz": "ru-pfd", // Penza
+	"ru-per": "ru-pfd", // Perm'
+	"ru-sam": "ru-pfd", // Samara
+	"ru-sar": "ru-pfd", // Saratov
+	"ru-ta":  "ru-pfd", // Tatarstan
+	"ru-ud":  "ru-pfd", // Udmurt
+	"ru-uly": "ru-pfd", // Ul'yanovsk
+
+	// Sibirskiy (S) Siberian
+	"ru-alt": "ru-sfd", // Altay
+	"ru-al":  "ru-sfd", // Gorno-Altay
+	"ru-irk": "ru-sfd", // Irkutsk
+	"ru-kem": "ru-sfd", // Kemerovo
+	"ru-kk":  "ru-sfd", // Khakass
+	"ru-kya": "ru-sfd", // Krasnoyarsk
+	"ru-nvs": "ru-sfd", // Novosibirsk
+	"ru-oms": "ru-sfd", // Omsk
+	"ru-tom": "ru-sfd", // Tomsk
+	"ru-ty":  "ru-sfd", // Tuva
+
+	// Tsentral'nyy (T) Central
+	"ru-bel": "ru-tfd", // Belgorod
+	"ru-bry": "ru-tfd", // Bryansk
+	"ru-iva": "ru-tfd", // Ivanovo
+	"ru-klu": "ru-tfd", // Kaluga
+	"ru-kos": "ru-tfd", // Kostroma
+	"ru-krs": "ru-tfd", // Kursk
+	"ru-lip": "ru-tfd", // Lipetsk
+	"ru-mow": "ru-tfd", // Moscow City
+	"ru-mos": "ru-tfd", // Moskva
+	"ru-orl": "ru-tfd", // Orel
+	"ru-rya": "ru-tfd", // Ryazan'
+	"ru-smo": "ru-tfd", // Smolensk
+	"ru-tam": "ru-tfd", // Tambov
+	"ru-tul": "ru-tfd", // Tula
+	"ru-tve": "ru-tfd", // Tver'
+	"ru-vla": "ru-tfd", // Vladimir
+	"ru-vor": "ru-tfd", // Voronezh
+	"ru-yar": "ru-tfd", // Yaroslavl'
+
+	// Ural'skiy (U) Ural
+	"ru-che": "ru-ufd", // Chelyabinsk
+	"ru-khm": "ru-ufd", // Khanty-Mansiy
+	"ru-kgn": "ru-ufd", // Kurgan
+	"ru-sve": "ru-ufd", // Sverdlovsk
+	"ru-tyu": "ru-ufd", // Tyumen'
+	"ru-yan": "ru-ufd", // Yamal-Nenets
+
+	// Severo-Zapadnyy (V) Northwestern
+	"ru-ark": "ru-vfd", // Arkhangel'sk
+	"ru-kgd": "ru-vfd", // Kaliningrad
+	"ru-kr":  "ru-vfd", // Karelia
+	"ru-ko":  "ru-vfd", // Komi
+	"ru-len": "ru-vfd", // Leningrad
+	"ru-mur": "ru-vfd", // Murmansk
+	"ru-nen": "ru-vfd", // Nenets
+	"ru-ngr": "ru-vfd", // Novgorod
+	"ru-psk": "ru-vfd", // Pskov
+	"ru-spe": "ru-vfd", // Saint Petersburg City
+	"ru-vlg": "ru-vfd", // Vologda
+
+	// Yuzhnyy (Y) Southern
+	"ru-ad":  "ru-yfd", // Adygey
+	"ru-ast": "ru-yfd", // Astrakhan'
+	"ru-kl":  "ru-yfd", // Kalmyk
+	"ru-kda": "ru-yfd", // Krasnodar
+	"ru-ros": "ru-yfd", // Rostov
+	"ru-vgg": "ru-yfd", // Volgograd
 }
 
 var RegionGroupRegions = map[string][]string{}
 
 func CountryRegionGroup(country, region string) string {
 
-	if country != "us" {
+	if country != "us" && country != "ru" {
 		return ""
 	}