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ifsc.go
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ifsc.go
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package ifsc
import (
"embed"
"encoding/json"
"errors"
"fmt"
"io/ioutil"
"log"
"path"
"runtime"
"strconv"
"strings"
)
var ifscMap map[string][]Data
var bankNames map[string]string
var sublet map[string]string
var customSublets map[string]string
//go:embed data/banks.json
//go:embed data/banknames.json
//go:embed data/IFSC.json
//go:embed data/custom-sublets.json
//go:embed data/sublet.json
var embeddedFileStorage embed.FS
type Data struct {
Value string
}
func (d Data) MarshalJSON() ([]byte, error) {
return json.Marshal(d.Value)
}
func (d *Data) UnmarshalJSON(input []byte) error {
var value int
if err := json.Unmarshal(input, &value); err != nil {
var value string
if err := json.Unmarshal(input, &value); err != nil {
return err
}
d.Value = value
return nil
}
d.Value = strconv.Itoa(value)
return nil
}
func init() {
LoadBankData()
if ifscMap == nil {
if err := LoadFile("IFSC.json", &ifscMap, ""); err != nil {
log.Panic(fmt.Sprintf("there is some error in IFSC.json file: %v", err))
}
}
if sublet == nil {
if err := LoadFile("sublet.json", &sublet, ""); err != nil {
log.Panic(fmt.Sprintf("there is some error in sublet.json file: %v", err))
}
}
if customSublets == nil {
if err := LoadFile("custom-sublets.json", &customSublets, ""); err != nil {
log.Panic(fmt.Sprintf("there is some error in custom-sublets.json file: %v", err))
}
}
if bankNames == nil {
if err := LoadFile("banknames.json", &bankNames, ""); err != nil {
log.Panic(fmt.Sprintf("there is some error in banknames.json file: %v", err))
}
}
}
func LoadFile(fileName string, result interface{}, fullDirPath string) error {
if bytes, err := embeddedFileStorage.ReadFile("data/" + fileName); err == nil {
if erro := json.Unmarshal(bytes, &result); erro != nil {
return erro
}
return nil
}
_, fileN, _, ok := runtime.Caller(0)
if !ok {
return errors.New("it was not possible to recover the information. Caller function error")
}
dir, _ := path.Split(fileN)
jsonDir := path.Join(dir, "..")
var completePath string
if fullDirPath != "" {
completePath = path.Join(fullDirPath, fileName)
} else {
completePath = path.Join(jsonDir, fileName)
}
bytes, err := ioutil.ReadFile(completePath)
if err != nil {
return err
}
if err := json.Unmarshal(bytes, &result); err != nil {
return err
}
return nil
}
func Validate(code string) bool {
if len(code) != 11 || string(code[4]) != "0" {
return false
}
bankCode := strings.ToUpper(code[0:4])
branchCode := strings.ToUpper(code[5:])
list, ok := ifscMap[bankCode]
if !ok {
return false
}
branchData, err := getData(branchCode)
if err != nil {
return false
}
for _, data := range list {
if data == *branchData {
return true
}
}
return false
}
func getData(input string) (*Data, error) {
var inputBytes []byte
var err error
intValue, err := strconv.ParseInt(input, 10, 32)
if err == nil {
input = strconv.Itoa(int(intValue))
}
if inputBytes, err = json.Marshal(input); err != nil {
return nil, err
}
var output Data
if err := json.Unmarshal(inputBytes, &output); err != nil {
return nil, err
}
return &output, nil
}
func GetBankName(code string) (string, error) {
bankName, ok := bankNames[code]
if !ok {
if Validate(code) {
bankCode, ok := sublet[code]
if !ok {
bankName, err := GetCustomSubletName(code)
if err != nil {
bankName, _ := bankNames[code[0:4]]
return bankName, nil
} else {
return bankName, nil
}
}
return bankNames[bankCode], nil
} else {
return "", errors.New("invalid bank code")
}
}
return bankName, nil
}
func GetCustomSubletName(code string) (string, error) {
for key, value := range customSublets {
if len(code) >= len(key) && code[0:len(key)] == key {
bankName, ok := bankNames[value]
if !ok {
return value, nil
}
return bankName, nil
}
}
return "", ErrCustomSubletNotFound
}
func ValidateBankCode(bankCodeInput string) bool {
_, ok := bankCodes[bankCodeInput]
return ok
}