isIDCard18Exact static method

bool isIDCard18Exact(String input)

Return whether input matches regex of exact id card number which length is 18. 返回输入是否匹配长度为18的id卡号的正则表达式。

Implementation

static bool isIDCard18Exact(String input) {
    if (isIDCard18(input)) {
        List<int> factor = [7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2];
        List<String> suffix = [
            '1',
            '0',
            'X',
            '9',
            '8',
            '7',
            '6',
            '5',
            '4',
            '3',
            '2'
        ];
        if (cityMap.isEmpty) {
            List<String> list = ID_CARD_PROVINCE_DICT;
            List<MapEntry<String, String>> mapEntryList = [];
            for (int i = 0, length = list.length; i < length; i++) {
                List<String> tokens = list[i].trim().split('=');
                MapEntry<String, String> mapEntry = MapEntry(tokens[0], tokens[1]);
                mapEntryList.add(mapEntry);
            }
            cityMap.addEntries(mapEntryList);
        }
        if (cityMap[input.substring(0, 2)] != null) {
            int weightSum = 0;
            for (int i = 0; i < 17; ++i) {
                weightSum += (input.codeUnitAt(i) - '0'.codeUnitAt(0)) * factor[i];
            }
            int idCardMod = weightSum % 11;
            String idCardLast = String.fromCharCode(input.codeUnitAt(17));
            return idCardLast == suffix[idCardMod];
        }
    }
    return false;
}