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// Copyright (C) 2009 The Android Open Source Project
//
// 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.gerrit.server.mail;
import java.io.UnsupportedEncodingException;
class Address {
static Address parse(final String in) {
final int lt = in.indexOf('<');
final int gt = in.indexOf('>');
final int at = in.indexOf("@");
if (0 <= lt && lt < gt && lt + 1 < at && at + 1 < gt) {
final String email = in.substring(lt + 1, gt).trim();
final String name = in.substring(0, lt).trim();
return new Address(name.length() > 0 ? name : null, email);
}
if (lt < 0 && gt < 0 && 0 < at && at < in.length() - 1) {
return new Address(in);
}
throw new IllegalArgumentException("Invalid email address: " + in);
}
final String name;
final String email;
Address(String email) {
this(null, email);
}
Address(String name, String email) {
this.name = name;
this.email = email;
}
@Override
public String toString() {
try {
return toHeaderString();
} catch (UnsupportedEncodingException e) {
throw new RuntimeException("Cannot encode address", e);
}
}
String toHeaderString() throws UnsupportedEncodingException {
if (name != null) {
return quotedPhrase(name) + " <" + email + ">";
} else if (isSimple()) {
return email;
}
return "<" + email + ">";
}
private static final String MUST_QUOTE_EMAIL = "()<>,;:\\\"[]";
private static final String MUST_QUOTE_NAME = MUST_QUOTE_EMAIL + "@.";
private boolean isSimple() {
for (int i = 0; i < email.length(); i++) {
final char c = email.charAt(i);
if (c <= ' ' || 0x7F <= c || MUST_QUOTE_EMAIL.indexOf(c) != -1) {
return false;
}
}
return true;
}
private static String quotedPhrase(final String name)
throws UnsupportedEncodingException {
if (EmailHeader.needsQuotedPrintable(name)) {
return EmailHeader.quotedPrintable(name);
}
for (int i = 0; i < name.length(); i++) {
final char c = name.charAt(i);
if (MUST_QUOTE_NAME.indexOf(c) != -1) {
return wrapInQuotes(name);
}
}
return name;
}
private static String wrapInQuotes(final String name) {
final StringBuilder r = new StringBuilder(2 + name.length());
r.append('"');
for (int i = 0; i < name.length(); i++) {
char c = name.charAt(i);
if (c == '"' || c == '\\') {
r.append('\\');
}
r.append(c);
}
r.append('"');
return r.toString();
}
}
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