From 3feb20755f9df04f30f7be47546066a6d4c3e3db Mon Sep 17 00:00:00 2001
From: Alexander <sav3nme@gmail.com>
Date: Tue, 14 Jan 2020 13:29:59 +0300
Subject: [PATCH 1/3] patterns: add IMEI regexp

---
 patterns.go | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/patterns.go b/patterns.go
index 1cf9726..e55451c 100644
--- a/patterns.go
+++ b/patterns.go
@@ -48,6 +48,7 @@ const (
 	hasUpperCase      string = ".*[[:upper:]]"
 	hasWhitespace     string = ".*[[:space:]]"
 	hasWhitespaceOnly string = "^[[:space:]]+$"
+	IMEI              string = "^[0-9a-f]{14}$|^\\d{15}$|^\\d{18}$"
 )
 
 // Used by IsFilePath func
@@ -100,4 +101,5 @@ var (
 	rxHasUpperCase      = regexp.MustCompile(hasUpperCase)
 	rxHasWhitespace     = regexp.MustCompile(hasWhitespace)
 	rxHasWhitespaceOnly = regexp.MustCompile(hasWhitespaceOnly)
+	rxIMEI              = regexp.MustCompile(IMEI)
 )

From fa93e506497e4c99061a6a2db118a295d97ae9e0 Mon Sep 17 00:00:00 2001
From: Alexander <sav3nme@gmail.com>
Date: Tue, 14 Jan 2020 13:30:52 +0300
Subject: [PATCH 2/3] validator_test: add test case for IsIMEI

---
 validator_test.go | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/validator_test.go b/validator_test.go
index 47743c9..618e6c2 100644
--- a/validator_test.go
+++ b/validator_test.go
@@ -4239,3 +4239,21 @@ func TestIsType(t *testing.T) {
 		}
 	}
 }
+
+func TestIsIMEI(t *testing.T) {
+	tests := []struct {
+		param    string
+		expected bool
+	}{
+		{"990000862471854", true},
+		{"351756051523999", true},
+		{"9900008624718541", false},
+		{"1", false},
+	}
+	for _, test := range tests {
+		actual := IsIMEI(test.param)
+		if actual != test.expected {
+			t.Errorf("Expected IsIMEI(%q) to be %v, got %v", test.param, test.expected, actual)
+		}
+	}
+}

From 980a5a4d8020dfacbbe689c1d99c6e59039d3e12 Mon Sep 17 00:00:00 2001
From: Alexander <sav3nme@gmail.com>
Date: Tue, 14 Jan 2020 13:34:31 +0300
Subject: [PATCH 3/3] validator: add IsIMEI

---
 types.go     | 1 +
 validator.go | 5 +++++
 2 files changed, 6 insertions(+)

diff --git a/types.go b/types.go
index f42a346..b57b666 100644
--- a/types.go
+++ b/types.go
@@ -162,6 +162,7 @@ var TagMap = map[string]Validator{
 	"ISO3166Alpha2":      IsISO3166Alpha2,
 	"ISO3166Alpha3":      IsISO3166Alpha3,
 	"ISO4217":            IsISO4217,
+	"IMEI":               IsIMEI,
 }
 
 // ISO3166Entry stores country codes
diff --git a/validator.go b/validator.go
index 14682e0..1327fcd 100644
--- a/validator.go
+++ b/validator.go
@@ -737,6 +737,11 @@ func IsLongitude(str string) bool {
 	return rxLongitude.MatchString(str)
 }
 
+// IsIMEI check if a string is valid IMEI
+func IsIMEI(str string) bool {
+	return rxIMEI.MatchString(str)
+}
+
 // IsRsaPublicKey check if a string is valid public key with provided length
 func IsRsaPublicKey(str string, keylen int) bool {
 	bb := bytes.NewBufferString(str)