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JAMES-1818 Remove store usage in getMessagesMethod by using managers
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Raphael Ouazana
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Aug 29, 2016
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127 changes: 127 additions & 0 deletions
127
server/protocols/jmap/src/main/java/org/apache/james/jmap/model/MessageContentExtractor.java
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| @@ -0,0 +1,127 @@ | ||
| /**************************************************************** | ||
| * Licensed to the Apache Software Foundation (ASF) under one * | ||
| * or more contributor license agreements. See the NOTICE file * | ||
| * distributed with this work for additional information * | ||
| * regarding copyright ownership. The ASF licenses this file * | ||
| * to you 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. * | ||
| ****************************************************************/ | ||
|
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| package org.apache.james.jmap.model; | ||
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| import java.io.IOException; | ||
| import java.util.List; | ||
| import java.util.Optional; | ||
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| import org.apache.commons.io.IOUtils; | ||
| import org.apache.james.mime4j.dom.Body; | ||
| import org.apache.james.mime4j.dom.Entity; | ||
| import org.apache.james.mime4j.dom.Multipart; | ||
| import org.apache.james.mime4j.dom.TextBody; | ||
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| import com.github.fge.lambdas.Throwing; | ||
|
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| public class MessageContentExtractor { | ||
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| public MessageContent extract(org.apache.james.mime4j.dom.Message message) throws IOException { | ||
| Body body = message.getBody(); | ||
| if (body instanceof TextBody) { | ||
| return parseTextBody(message, (TextBody)body); | ||
| } | ||
| if (body instanceof Multipart){ | ||
| return parseMultipart(message, (Multipart)body); | ||
| } | ||
| return MessageContent.empty(); | ||
| } | ||
|
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| private MessageContent parseTextBody(Entity entity, TextBody textBody) throws IOException { | ||
| String bodyContent = asString(textBody); | ||
| if ("text/html".equals(entity.getMimeType())) { | ||
| return MessageContent.ofHtmlOnly(bodyContent); | ||
| } | ||
| return MessageContent.ofTextOnly(bodyContent); | ||
| } | ||
|
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| private MessageContent parseMultipart(Entity entity, Multipart multipart) throws IOException { | ||
| if ("multipart/alternative".equals(entity.getMimeType())) { | ||
| return parseMultipartAlternative(multipart); | ||
| } | ||
| return parseMultipartMixed(multipart); | ||
| } | ||
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| private String asString(TextBody textBody) throws IOException { | ||
| return IOUtils.toString(textBody.getInputStream(), textBody.getMimeCharset()); | ||
| } | ||
|
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| private MessageContent parseMultipartMixed(Multipart multipart) throws IOException { | ||
| List<Entity> parts = multipart.getBodyParts(); | ||
| if (! parts.isEmpty()) { | ||
| Entity firstPart = parts.get(0); | ||
| if (firstPart.getBody() instanceof Multipart && "multipart/alternative".equals(firstPart.getMimeType())) { | ||
| return parseMultipartAlternative((Multipart)firstPart.getBody()); | ||
| } else { | ||
| if (firstPart.getBody() instanceof TextBody) { | ||
| return parseTextBody(firstPart, (TextBody)firstPart.getBody()); | ||
| } | ||
| } | ||
| } | ||
| return MessageContent.empty(); | ||
| } | ||
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| private MessageContent parseMultipartAlternative(Multipart multipart) throws IOException { | ||
| Optional<String> textBody = getFirstMatchingTextBody(multipart, "text/plain"); | ||
| Optional<String> htmlBody = getFirstMatchingTextBody(multipart, "text/html"); | ||
| return new MessageContent(textBody, htmlBody); | ||
| } | ||
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| private Optional<String> getFirstMatchingTextBody(Multipart multipart, String mimeType) throws IOException { | ||
| return multipart.getBodyParts() | ||
| .stream() | ||
| .filter(part -> mimeType.equals(part.getMimeType())) | ||
| .map(Entity::getBody) | ||
| .filter(TextBody.class::isInstance) | ||
| .map(TextBody.class::cast) | ||
| .findFirst() | ||
| .map(Throwing.function(this::asString).sneakyThrow()); | ||
| } | ||
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| public static class MessageContent { | ||
| private final Optional<String> textBody; | ||
| private final Optional<String> htmlBody; | ||
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| public MessageContent(Optional<String> textBody, Optional<String> htmlBody) { | ||
| this.textBody = textBody; | ||
| this.htmlBody = htmlBody; | ||
| } | ||
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| public static MessageContent ofTextOnly(String textBody) { | ||
| return new MessageContent(Optional.of(textBody), Optional.empty()); | ||
| } | ||
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| public static MessageContent ofHtmlOnly(String htmlBody) { | ||
| return new MessageContent(Optional.empty(), Optional.of(htmlBody)); | ||
| } | ||
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| public static MessageContent empty() { | ||
| return new MessageContent(Optional.empty(), Optional.empty()); | ||
| } | ||
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| public Optional<String> getTextBody() { | ||
| return textBody; | ||
| } | ||
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| public Optional<String> getHtmlBody() { | ||
| return htmlBody; | ||
| } | ||
| } | ||
| } |
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