/*
* Copyright 2007 ZXing authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.google.zxing.client.result;
import com.google.zxing.Result;
/**
* Implements the "MATMSG" email message entry format.
*
* Supported keys: TO, SUB, BODY
*
* @author Sean Owen
*/
final class EmailDoCoMoResultParser extends AbstractDoCoMoResultParser {
private static final char[] ATEXT_SYMBOLS =
{'@','.','!','#','$','%','&','\'','*','+','-','/','=','?','^','_','`','{','|','}','~'};
public static EmailAddressParsedResult parse(Result result) {
String rawText = result.getText();
if (rawText == null || !rawText.startsWith("MATMSG:")) {
return null;
}
String[] rawTo = matchDoCoMoPrefixedField("TO:", rawText, true);
if (rawTo == null) {
return null;
}
String to = rawTo[0];
if (!isBasicallyValidEmailAddress(to)) {
return null;
}
String subject = matchSingleDoCoMoPrefixedField("SUB:", rawText, false);
String body = matchSingleDoCoMoPrefixedField("BODY:", rawText, false);
return new EmailAddressParsedResult(to, subject, body, "mailto:" + to);
}
/**
* This implements only the most basic checking for an email address's validity -- that it contains
* an '@' contains no characters disallowed by RFC 2822. This is an overly lenient definition of
* validity. We want to generally be lenient here since this class is only intended to encapsulate what's
* in a barcode, not "judge" it.
*/
static boolean isBasicallyValidEmailAddress(String email) {
if (email == null) {
return false;
}
boolean atFound = false;
for (int i = 0; i < email.length(); i++) {
char c = email.charAt(i);
if ((c < 'a' || c > 'z') && (c < 'A' || c > 'Z') && (c < '0' || c > '9') &&
!isAtextSymbol(c)) {
return false;
}
if (c == '@') {
if (atFound) {
return false;
}
atFound = true;
}
}
return atFound;
}
private static boolean isAtextSymbol(char c) {
for (int i = 0; i < ATEXT_SYMBOLS.length; i++) {
if (c == ATEXT_SYMBOLS[i]) {
return true;
}
}
return false;
}
}