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plugins/jquery-validation/additional/nisBR.js

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+/**
+ * Created for project jquery-validation.
+ * @Description Brazillian PIS or NIS number (Número de Identificação Social Pis ou Pasep) is the equivalent of a
+ * Brazilian tax registration number NIS of PIS numbers have 11 digits in total: 10 numbers followed by 1 check numbers
+ * that are being used for validation.
+ * @copyright (c) 21/08/2018 13:14, Cleiton da Silva Mendonça
+ * @author Cleiton da Silva Mendonça <cleiton.mendonca@gmail.com>
+ * @link http://gitlab.com/csmendonca Gitlab of Cleiton da Silva Mendonça
+ * @link http://github.com/csmendonca Github of Cleiton da Silva Mendonça
+ */
+$.validator.addMethod( "nisBR", function( value ) {
+	var number;
+	var cn;
+	var sum = 0;
+	var dv;
+	var count;
+	var multiplier;
+
+	// Removing special characters from value
+	value = value.replace( /([~!@#$%^&*()_+=`{}\[\]\-|\\:;'<>,.\/? ])+/g, "" );
+
+	// Checking value to have 11 digits only
+	if ( value.length !== 11 ) {
+		return false;
+	}
+
+	//Get check number of value
+	cn = parseInt( value.substring( 10, 11 ), 10 );
+
+	//Get number with 10 digits of the value
+	number = parseInt( value.substring( 0, 10 ), 10 );
+
+	for ( count = 2; count < 12; count++ ) {
+		multiplier = count;
+		if ( count === 10 ) {
+			multiplier = 2;
+		}
+		if ( count === 11 ) {
+			multiplier = 3;
+		}
+		sum += ( ( number % 10 ) * multiplier );
+		number = parseInt( number / 10, 10 );
+	}
+	dv = ( sum % 11 );
+
+	if ( dv > 1 ) {
+		dv = ( 11 - dv );
+	} else {
+		dv = 0;
+	}
+
+	if ( cn === dv ) {
+		return true;
+	} else {
+		return false;
+	}
+}, "Please specify a valid NIS/PIS number" );