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added IsInCSV to validator.go, issue #468 #471

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added IsInCSV to validator.go, issue #468 #471

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31 changes: 31 additions & 0 deletions validator.go
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Original file line number Diff line number Diff line change
Expand Up @@ -6,12 +6,14 @@ import (
"crypto/rsa"
"crypto/x509"
"encoding/base64"
"encoding/csv"
"encoding/json"
"encoding/pem"
"fmt"
"io/ioutil"
"net"
"net/url"
"os"
"reflect"
"regexp"
"sort"
Expand Down Expand Up @@ -200,6 +202,35 @@ func IsNumeric(str string) bool {
return rxNumeric.MatchString(str)
}

// checks if the csv file contains the given string
func IsInCSV(str string, address string) bool {
if IsNull(str) {
return true
}

f, err := os.Open(address)
if err != nil {
return false //could not read file
}
defer f.Close()

csvReader := csv.NewReader(f)
records, err := csvReader.ReadAll()
if err != nil {
return false //file is not csv
}

for _, row := range records {
for _, val := range row {
val_str := string(val)
if strings.Contains(val_str, str) {
return true
}
}
}
return false
}

// IsUTFNumeric checks if the string contains only unicode numbers of any kind.
// Numbers can be 0-9 but also Fractions ¾,Roman Ⅸ and Hangzhou 〩. Empty string is valid.
func IsUTFNumeric(str string) bool {
Expand Down