Added Outlook message parser

ATTRIBUTION.md

@@ -34,3 +34,4 @@ FairEmail uses:
 * [OpenDyslexic](https://github.com/antijingoist/opendyslexic). Copyright (c) 12/2012 - 2019. Copyright (c) 2019-07-29, Abbie Gonzalez. [SIL Open Font License 1.1](https://github.com/antijingoist/opendyslexic/blob/master/OFL.txt).
 * [AndroidSVG](https://github.com/BigBadaboom/androidsvg). Copyright 2013 Paul LeBeau, Cave Rock Software Ltd. [Apache License 2.0](https://github.com/BigBadaboom/androidsvg/blob/master/LICENSE).
 * [Public Suffix List](https://publicsuffix.org/). Copyright © 2007–20 Mozilla Foundation. [Mozilla Public License, v. 2.0](https://mozilla.org/MPL/2.0/).
+* [Outlook Message Parser](https://github.com/bbottema/outlook-message-parser). Copyright (C) 2017 Benny Bottema. [Apache License 2.0](https://github.com/bbottema/outlook-message-parser/blob/master/LICENSE-2.0.txt).

app/build.gradle

@@ -85,6 +85,8 @@ android {
         exclude 'META-INF/LICENSE.gpl.txt'
         exclude 'META-INF/LICENSE.commercial.txt'
         exclude 'org/apache/**'
+        exclude 'LICENSE-2.0.txt'
+        exclude 'RELEASE.txt'
     }
 
     // https://google.github.io/android-gradle-dsl/current/com.android.build.gradle.internal.dsl.SigningConfig.html
@@ -262,6 +264,14 @@ configurations.all {
     // paging-runtime: AsyncPagedListDiffer, LivePagedListBuilder, PagedListAdapter, PagedStorageDiffHelper
 }
 
+configurations.all {
+    resolutionStrategy.eachDependency { details ->
+        if (details.requested.group == "org.apache.poi") {
+            details.useVersion "3.17"
+        }
+    }
+}
+
 dependencies {
     //implementation fileTree(dir: 'libs', include: ['*.jar'])
 
@@ -491,6 +501,9 @@ dependencies {
     // https://mvnrepository.com/artifact/org.apache.poi/poi-scratchpad
     implementation "org.apache.poi:poi-scratchpad:$apache_poi"
 
+    // https://github.com/bbottema/outlook-message-parser
+    implementation "org.simplejavamail:outlook-message-parser:1.7.12"
+
     // https://mvnrepository.com/artifact/org.reactivestreams/reactive-streams
     // https://mvnrepository.com/artifact/io.reactivex.rxjava2/rxjava
     implementation "org.reactivestreams:reactive-streams:$reactivestreams_version"

app/src/main/assets/ATTRIBUTION.md

@@ -34,3 +34,4 @@ FairEmail uses:
 * [OpenDyslexic](https://github.com/antijingoist/opendyslexic). Copyright (c) 12/2012 - 2019. Copyright (c) 2019-07-29, Abbie Gonzalez. [SIL Open Font License 1.1](https://github.com/antijingoist/opendyslexic/blob/master/OFL.txt).
 * [AndroidSVG](https://github.com/BigBadaboom/androidsvg). Copyright 2013 Paul LeBeau, Cave Rock Software Ltd. [Apache License 2.0](https://github.com/BigBadaboom/androidsvg/blob/master/LICENSE).
 * [Public Suffix List](https://publicsuffix.org/). Copyright © 2007–20 Mozilla Foundation. [Mozilla Public License, v. 2.0](https://mozilla.org/MPL/2.0/).
+* [Outlook Message Parser](https://github.com/bbottema/outlook-message-parser). Copyright (C) 2017 Benny Bottema. [Apache License 2.0](https://github.com/bbottema/outlook-message-parser/blob/master/LICENSE-2.0.txt).

app/src/main/java/eu/faircode/email/MessageHelper.java

@@ -45,6 +45,10 @@ import com.sun.mail.util.MessageRemovedIOException;
 import org.jsoup.nodes.Document;
 import org.jsoup.nodes.Element;
 import org.jsoup.select.Elements;
+import org.simplejavamail.outlookmessageparser.OutlookMessageParser;
+import org.simplejavamail.outlookmessageparser.model.OutlookAttachment;
+import org.simplejavamail.outlookmessageparser.model.OutlookFileAttachment;
+import org.simplejavamail.outlookmessageparser.model.OutlookMessage;
 
 import java.io.BufferedInputStream;
 import java.io.BufferedOutputStream;
@@ -2298,6 +2302,9 @@ public class MessageHelper {
 
             if (Helper.isTnef(local.type, local.name))
                 decodeTNEF(context, local);
+
+            if ("msg".equalsIgnoreCase(Helper.getExtension(local.name)))
+                decodeOutlook(context, local);
         }
 
         void downloadAttachment(Context context, int index, EntityAttachment local) throws MessagingException, IOException {
@@ -2535,6 +2542,110 @@ public class MessageHelper {
             }
         }
 
+        private void decodeOutlook(Context context, EntityAttachment local) {
+            try {
+                DB db = DB.getInstance(context);
+                int subsequence = 0;
+
+                // https://poi.apache.org/components/hmef/index.html
+                File file = local.getFile(context);
+                OutlookMessage msg = new OutlookMessageParser().parseMsg(file);
+
+                String headers = msg.getHeaders();
+                if (!TextUtils.isEmpty(headers)) {
+                    EntityAttachment attachment = new EntityAttachment();
+                    attachment.message = local.message;
+                    attachment.sequence = local.sequence;
+                    attachment.subsequence = ++subsequence;
+                    attachment.name = "headers.txt";
+                    attachment.type = "text/rfc822-headers";
+                    attachment.disposition = Part.ATTACHMENT;
+                    attachment.id = db.attachment().insertAttachment(attachment);
+
+                    Helper.writeText(attachment.getFile(context), headers);
+                    db.attachment().setDownloaded(attachment.id, (long) headers.length());
+                }
+
+                String html = msg.getBodyHTML();
+                if (!TextUtils.isEmpty(html)) {
+                    EntityAttachment attachment = new EntityAttachment();
+                    attachment.message = local.message;
+                    attachment.sequence = local.sequence;
+                    attachment.subsequence = ++subsequence;
+                    attachment.name = "body.html";
+                    attachment.type = "text/html";
+                    attachment.disposition = Part.ATTACHMENT;
+                    attachment.id = db.attachment().insertAttachment(attachment);
+
+                    File a = attachment.getFile(context);
+                    Helper.writeText(a, html);
+                    db.attachment().setDownloaded(attachment.id, a.length());
+                }
+
+                if (TextUtils.isEmpty(html)) {
+                    String text = msg.getBodyText();
+                    if (!TextUtils.isEmpty(text)) {
+                        EntityAttachment attachment = new EntityAttachment();
+                        attachment.message = local.message;
+                        attachment.sequence = local.sequence;
+                        attachment.subsequence = ++subsequence;
+                        attachment.name = "body.txt";
+                        attachment.type = "text/plain";
+                        attachment.disposition = Part.ATTACHMENT;
+                        attachment.id = db.attachment().insertAttachment(attachment);
+
+                        File a = attachment.getFile(context);
+                        Helper.writeText(a, text);
+                        db.attachment().setDownloaded(attachment.id, a.length());
+                    }
+                }
+
+                String rtf = msg.getBodyRTF();
+                if (!TextUtils.isEmpty(rtf)) {
+                    EntityAttachment attachment = new EntityAttachment();
+                    attachment.message = local.message;
+                    attachment.sequence = local.sequence;
+                    attachment.subsequence = ++subsequence;
+                    attachment.name = "body.rtf";
+                    attachment.type = "application/rtf";
+                    attachment.disposition = Part.ATTACHMENT;
+                    attachment.id = db.attachment().insertAttachment(attachment);
+
+                    File a = attachment.getFile(context);
+                    Helper.writeText(a, rtf);
+                    db.attachment().setDownloaded(attachment.id, a.length());
+                }
+
+                List<OutlookAttachment> attachments = msg.getOutlookAttachments();
+                for (OutlookAttachment oa : attachments)
+                    if (oa instanceof OutlookFileAttachment) {
+                        OutlookFileAttachment ofa = (OutlookFileAttachment) oa;
+
+                        EntityAttachment attachment = new EntityAttachment();
+                        attachment.message = local.message;
+                        attachment.sequence = local.sequence;
+                        attachment.subsequence = ++subsequence;
+                        attachment.name = ofa.getFilename();
+                        attachment.type = ofa.getMimeTag();
+                        attachment.disposition = Part.ATTACHMENT;
+                        attachment.id = db.attachment().insertAttachment(attachment);
+
+                        if (TextUtils.isEmpty(attachment.type))
+                            attachment.type = Helper.guessMimeType(attachment.name);
+
+                        byte[] data = ofa.getData();
+                        try (OutputStream os = new FileOutputStream(attachment.getFile(context))) {
+                            os.write(data);
+                        }
+
+                        db.attachment().setDownloaded(attachment.id, (long) data.length);
+                    }
+
+            } catch (Throwable ex) {
+                Log.w(ex);
+            }
+        }
+
         String getWarnings(String existing) {
             if (existing != null)
                 warnings.add(0, existing);