feat: bank card.

bank_card/README.md

@@ -8,6 +8,8 @@
 - [Luhn algorithm - geeksforgeeks](https://www.geeksforgeeks.org/luhn-algorithm/)
 - [Luhn’s algorithm to validate credit / debit card Numbers](https://medium.com/@akshaymohite/luhns-algorithm-to-validate-credit-debit-card-numbers-1952e6c7a9d0)
 - [干货丨银行卡号编码规则及其应用](https://www.woshipm.com/pd/371041.html)
-- [giraffe-lib](https://github.com/giraffe-lib/bankInfo/blob/main/src/map.js)
+- [bankInfo](https://github.com/giraffe-lib/bankInfo/blob/main/src/map.js)
 - [BankCards](https://github.com/geekgao/BankCards/blob/master/bankcode.py)
 - [bcbc](https://github.com/hexindai/bcbc)
+- [banks-db](https://github.com/ramoona/banks-db)
+- [SwiftCodes](https://github.com/PeterNotenboom/SwiftCodes)

bank_card/bank_card.go

@@ -1,6 +1,9 @@
 package bank_card
 
-import "strings"
+import (
+	"strconv"
+	"strings"
+)
 
 var BANKBIN = []string{
 	"621098", "622150", "622151",
@@ -651,3 +654,22 @@ func GetNameOfBank(cardNo string) string {
 
 	return BANKNAME[index]
 }
+
+var defaultDatabase *Database = NewDatabase(false)
+
+func QueryBankByCardNumber(cardNo string) *BankCard {
+	if len(cardNo) < 6 {
+		return nil
+	}
+
+	for i := 6; i <= 8; i++ {
+		cardBin := cardNo[0:i]
+		bin, _ := strconv.Atoi(cardBin)
+		bank := defaultDatabase.queryBankCard(uint32(bin))
+		if bank != nil {
+			return bank
+		}
+	}
+
+	return nil
+}

bank_card/bank_card_test.go

@@ -17,6 +17,7 @@ func TestGetNameOfBank(t *testing.T) {
 		"6228481698729890079",
 		"621661280000447287",
 		"6222081106004039591",
+		"6201140000000000000",
 	}
 
 	for _, w := range validBankCards {
@@ -27,3 +28,25 @@ func TestGetNameOfBank(t *testing.T) {
 		})
 	}
 }
+
+func TestQueryBankByCardNumber(t *testing.T) {
+	var validBankCards = []string{
+		"6226095711989751",
+		"6228480402564890018",
+		"6228480402637874213",
+		"6228481552887309119",
+		"6228480801416266113",
+		"6228481698729890079",
+		"621661280000447287",
+		"6222081106004039591",
+		"6201140000000000000",
+	}
+
+	for _, w := range validBankCards {
+		t.Run("get bank card of name: "+w, func(t *testing.T) {
+			bankCard := QueryBankByCardNumber(w)
+			fmt.Println(w, bankCard)
+			assert.NotNil(t, bankCard)
+		})
+	}
+}

bank_card/database.go

@@ -18,12 +18,20 @@ type Database struct {
 	db *sql.DB
 }
 
-func NewDatabase() *Database {
-	return &Database{}
+func NewDatabase(openFile bool) *Database {
+	db := &Database{}
+
+	if openFile {
+		db.openFromFile()
+	} else {
+		_ = db.openFromEmbed()
+	}
+
+	return db
 }
 
-// OpenFromFile 从文件打开数据库
-func (d *Database) OpenFromFile() {
+// openFromFile 从文件打开数据库
+func (d *Database) openFromFile() {
 	db, err := sql.Open("sqlite3", "bank_card.db")
 	if err != nil {
 		panic("failed to connect database")
@@ -34,8 +42,8 @@ func (d *Database) OpenFromFile() {
 	d.initTables()
 }
 
-// OpenFromEmbed 从内嵌文件打开数据库
-func (d *Database) OpenFromEmbed() error {
+// openFromEmbed 从内嵌文件打开数据库
+func (d *Database) openFromEmbed() error {
 	db, err := sql.Open("sqlite3", "file::memory:?mode=ro&cache=shared")
 	if err != nil {
 		panic("failed to connect database")
@@ -110,9 +118,17 @@ func (d *Database) insertDataToBankCardTable(data *BankCard) {
 	}
 }
 
+func (d *Database) UpdateBankCardTableCardName(bin uint32, cardName string) {
+	strSql := fmt.Sprintf("UPDATE bank_cards SET card_name = '%s' WHERE bin = '%d';", cardName, bin)
+	_, err := d.db.Exec(strSql)
+	if err != nil {
+		log.Println(err)
+	}
+}
+
 // queryBank 查询银行信息
 func (d *Database) queryBank(bankCode string) *Bank {
-	strSql := fmt.Sprintf("SELECT * FROM banks WHERE bank_code = '%s' LIMIT 1;", bankCode)
+	strSql := fmt.Sprintf("SELECT id, bank_code, bank_name FROM banks WHERE bank_code = '%s' LIMIT 1;", bankCode)
 	rows, err := d.db.Query(strSql)
 	if err != nil {
 		log.Fatal("query bank failed:", err)
@@ -134,7 +150,7 @@ func (d *Database) queryBank(bankCode string) *Bank {
 
 // queryBankCard 查询银行卡信息
 func (d *Database) queryBankCard(bin uint32) *BankCard {
-	strSql := fmt.Sprintf("SELECT * FROM bank_cards WHERE bin = '%d' LIMIT 1;", bin)
+	strSql := fmt.Sprintf("SELECT bin, bank_code, card_name, card_type, card_length FROM bank_cards WHERE bin = '%d' LIMIT 1;", bin)
 	rows, err := d.db.Query(strSql)
 	if err != nil {
 		log.Fatal("query bank card failed:", err)