Add Password validation

src/main/kotlin/fr/dcproject/common/validation/Password.kt

@@ -0,0 +1,22 @@
+package fr.dcproject.common.validation
+
+import io.konform.validation.ValidationBuilder
+
+fun ValidationBuilder<String>.passwordScore(minScore: Int) =
+    addConstraint("is not enough strong. Use Upper case, Lower case and special characters or juste use more characters.") { value ->
+        value.passwordScore() >= minScore
+    }
+
+fun String.passwordScore(): Int {
+    var score: Int = length
+    val alphaNum = ('a'..'z').toList() + ('A'..'Z').toList() + ('0'..'9').toList()
+    val specialCount = (length - toList().intersect(alphaNum).size)
+    score += specialCount.let { if (it > 3) 3 else it }
+
+    val hasAlphaLower = toList().intersect(('a'..'z').toList()).size.let { if (it > 2) 2 else it }
+    val hasAlphaUpper = toList().intersect(('A'..'Z').toList()).size.let { if (it > 2) 2 else it }
+    val hasNum = toList().intersect(('0'..'9').toList()).size.let { if (it > 2) 2 else it }
+    score += (hasAlphaLower + hasAlphaUpper + hasNum - 2) * 2
+
+    return score
+}