From ebe1ebb339ae33df866accb4e7ee4b1e9e2aba93 Mon Sep 17 00:00:00 2001
From: alireza <alirezzzhp1378@gmail.com>
Date: Sat, 5 Feb 2022 00:06:58 +0330
Subject: [PATCH] added IsInCSV to validator.go

---
 validator.go | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/validator.go b/validator.go
index 46ecfc8..b6e5a7e 100644
--- a/validator.go
+++ b/validator.go
@@ -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"
@@ -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 {