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static const std::string base64_chars =

"ABCDEFGHIJKLMNOPQRSTUVWXYZ"

"abcdefghijklmnopqrstuvwxyz"
"0123456789+/";

static inline bool is_base64(unsigned char c) {
	return (isalnum(c) || (c == '+') || (c == '/'));
}

std::string base64_decode(std::string const& encoded_string) {
	int in_len = encoded_string.size();
	int i = 0;
	int j = 0;
	int in_ = 0;
	unsigned char char_array_4[4], char_array_3[3];
	std::string ret;

	while (in_len-- && (encoded_string[in_] != '=') && is_base64(encoded_string[in_])) {
		char_array_4[i++] = encoded_string[in_]; in_++;
		if (i == 4) {
			for (i = 0; i < 4; i++)
				char_array_4[i] = base64_chars.find(char_array_4[i]);

			char_array_3[0] = (char_array_4[0] << 2) + ((char_array_4[1] & 0x30) >> 4);
			char_array_3[1] = ((char_array_4[1] & 0xf) << 4) + ((char_array_4[2] & 0x3c) >> 2);
			char_array_3[2] = ((char_array_4[2] & 0x3) << 6) + char_array_4[3];

			for (i = 0; (i < 3); i++)
				ret += char_array_3[i];
			i = 0;
		}
	}

	if (i) {
		for (j = i; j < 4; j++)
			char_array_4[j] = 0;

		for (j = 0; j < 4; j++)
			char_array_4[j] = base64_chars.find(char_array_4[j]);

		char_array_3[0] = (char_array_4[0] << 2) + ((char_array_4[1] & 0x30) >> 4);
		char_array_3[1] = ((char_array_4[1] & 0xf) << 4) + ((char_array_4[2] & 0x3c) >> 2);
		char_array_3[2] = ((char_array_4[2] & 0x3) << 6) + char_array_4[3];

		for (j = 0; (j < i - 1); j++) ret += char_array_3[j];
	}

	return ret;
}

void fix_mobile(string& decoded_token) {

	string cleaned_token;

	istringstream stream(decoded_token);
	string line;
	while (getline(stream, line)) {
		if (line == "undefined") continue;
		size_t delimiter_pos = line.find('|');
		if (delimiter_pos != string::npos && delimiter_pos == line.length() - 1) continue;
		cleaned_token += line + "\n";
	}
	if (!cleaned_token.empty()) cleaned_token.pop_back();
	decoded_token = cleaned_token;
}
string get_value(const string& data, const string& key) {
	istringstream stream(data);
	string line;
	while (getline(stream, line)) {
		size_t delimiter_pos = line.find('|');
		if (delimiter_pos != string::npos) {
			string current_key = line.substr(0, delimiter_pos);
			string value = line.substr(delimiter_pos + 1);
			if (current_key == key) {
				return value;
			}
		}
	}
	return "";
}