tables.go

package urlqstr

//
//go-urlqstr
//Copyright (C) 2020  kmahyyg @ PatMeow Ltd.
//
//This program is free software: you can redistribute it and/or modify
//it under the terms of the GNU Affero General Public License as published by
//the Free Software Foundation, either version 3 of the License, or
//(at your option) any later version.
//
//This program is distributed in the hope that it will be useful,
//but WITHOUT ANY WARRANTY; without even the implied warranty of
//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//GNU Affero General Public License for more details.
//
//You should have received a copy of the GNU Affero General Public License
//along with this program.  If not, see <http://www.gnu.org/licenses/>.
//
//
// Check if the tag value contains invalid chars which could not be directly used as url
// https://tools.ietf.org/html/rfc3986 RFC3986

const upperCaseStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
const lowerCaseStr = "abcdefghijklmnopqrstuvwxyz"
const digitsStr = "1234567890"
const specialSymbolsStr = "-._~%"
const allowedChars = upperCaseStr + lowerCaseStr + digitsStr + specialSymbolsStr

func isValidTag(tagval string) bool{
	for _, char := range tagval {
		// if char in allowedchars, go ahead; else, return false
		if !isValidRuneInStr(char, allowedChars) {
			return false
		}
	}
	return true
}

func isValidRuneInStr(val rune, data string) bool{
	for _, item := range data {
		if item == val {
			return false
		}
	}
	return true
}