From acdb157282ac4705d8ec3ffab75b6bba2cc08550 Mon Sep 17 00:00:00 2001
From: Syndamia <kamen.d.mladenov@protonmail.com>
Date: Mon, 5 Jul 2021 16:47:10 +0300
Subject: Changed file structure and implemented rester file creation and login
 check

---
 go-src/dataValidations.go | 55 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 55 insertions(+)
 create mode 100644 go-src/dataValidations.go

(limited to 'go-src/dataValidations.go')

diff --git a/go-src/dataValidations.go b/go-src/dataValidations.go
new file mode 100644
index 0000000..b391eb3
--- /dev/null
+++ b/go-src/dataValidations.go
@@ -0,0 +1,55 @@
+package ctfc
+
+import (
+	"regexp"
+)
+
+var SpecialCharacters = []rune{'!', '@', '#', '$', '%', '^', '&', '*'}
+
+// Inclusive minimum and maximum
+func stringValidLength(min int, max int, value string) bool {
+	return len(value) >= min && len(value) <= max
+}
+
+func stringValidCharacters(value string, letters bool, numbers bool, special ...rune) bool {
+	expr := "^["
+	if letters {
+		expr += "A-z"
+	}
+	if numbers {
+		expr += "0-9"
+	}
+	for _, v := range special {
+		expr += string(v)
+	}
+	expr += "]+$"
+
+	return regexp.MustCompile(expr).MatchString(value)
+}
+
+func stringValidRuneAmount(value string, runeStart rune, runeEnd rune, minAmount int) bool {
+	var sum int
+	for _, v := range value {
+		if v >= runeStart && v <= runeEnd {
+			sum++
+		}
+	}
+	return sum >= minAmount
+}
+
+func stringValidUsername(value string) bool {
+	return stringValidLength(2, 40, value) &&
+		stringValidCharacters(value, true, true, '.', '*', '_', '-') &&
+		(stringValidRuneAmount(value, 'A', 'Z', 1) || stringValidRuneAmount(value, 'a', 'z', 1))
+}
+
+func stringValidPassword(value string) bool {
+	return stringValidLength(5, 40, value) &&
+		stringValidCharacters(value, true, true, SpecialCharacters...) &&
+		stringValidRuneAmount(value, '0', '9', 1)
+}
+
+func stringValidName(value string) bool {
+	return stringValidLength(2, 60, value) &&
+		stringValidCharacters(value, true, false, ' ', '\'', '-')
+}
-- 
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