Support sharing calendar events as .vcs files to MMS.

- Export calendar events to a temporary .vcs file. Currently, the actual
  file format is still ical, this may need to be reformatted to actually
  contain only vCalendar content.
- Share this specifically to the com.android.mms package when the share button is clicked.
- Share the event as ical .ics to all other applications.

Change-Id: If337360b17d4071d580087ecc97a2397d0563ff6

3 files changed, 81 insertions, 9 deletions

diff --git a/src/com/android/calendar/AllInOneActivity.java b/src/com/android/calendar/AllInOneActivity.java
index 7bcb6772..3c869574 100644
--- a/src/com/android/calendar/AllInOneActivity.java
+++ b/src/com/android/calendar/AllInOneActivity.java
@@ -451,8 +451,8 @@ public class AllInOneActivity extends AbstractCalendarActivity implements EventH
             getLoaderManager().initLoader(0, null, this);
         }
 
-        // clean up cached ics files - in case onDestroy() didn't run the last time
-        cleanupCachedIcsFiles();
+        // clean up cached ics and vcs files - in case onDestroy() didn't run the last time
+        cleanupCachedEventFiles();
     }
 
     private long parseViewAction(final Intent intent) {
@@ -644,22 +644,22 @@ public class AllInOneActivity extends AbstractCalendarActivity implements EventH
 
         CalendarController.removeInstance(this);
 
-        // clean up cached ics files
-        cleanupCachedIcsFiles();
+        // clean up cached ics and vcs files
+        cleanupCachedEventFiles();
     }
 
     /**
-     * Cleans up the temporarily generated ics files in the cache directory
-     * The files are of the format *.ics
+     * Cleans up the temporarily generated ics and vcs files in the cache directory
+     * The files are of the format *.ics and *.vcs
      */
-    private void cleanupCachedIcsFiles() {
+    private void cleanupCachedEventFiles() {
         if (!isExternalStorageWritable()) return;
         File cacheDir = getExternalCacheDir();
         File[] files = cacheDir.listFiles();
         if (files == null) return;
         for (File file : files) {
             String filename = file.getName();
-            if (filename.endsWith(".ics")) {
+            if (filename.endsWith(".ics") || filename.endsWith(".vcs")) {
                 file.delete();
             }
         }
diff --git a/src/com/android/calendar/EventInfoFragment.java b/src/com/android/calendar/EventInfoFragment.java
index 85be389d..90f73b02 100644
--- a/src/com/android/calendar/EventInfoFragment.java
+++ b/src/com/android/calendar/EventInfoFragment.java
@@ -1340,7 +1340,27 @@ public class EventInfoFragment extends DialogFragment implements OnCheckedChange
                 // the ics file is sent as an extra, the receiving application decides whether to
                 // parse the file to extract calendar events or treat it as a regular file
                 shareIntent.setType("application/octet-stream");
-                startActivity(shareIntent);
+
+                Intent chooserIntent = Intent.createChooser(shareIntent,
+                                        getResources().getString(R.string.cal_share_intent_title));
+
+                // The MMS app only responds to "text/x-vcalendar" so we create a chooser intent
+                // that includes the targeted mms intent + any that respond to the above general
+                // purpose "application/octet-stream" intent.
+                File vcsInviteFile = File.createTempFile(filePrefix, ".vcs",
+                    mActivity.getExternalCacheDir());
+                // for now , we are duplicating ics file and using that as the vcs file
+                // TODO: revisit above
+                if (IcalendarUtils.copyFile(inviteFile, vcsInviteFile)) {
+                    Intent mmsShareIntent = new Intent();
+                    mmsShareIntent.setAction(Intent.ACTION_SEND);
+                    mmsShareIntent.setPackage("com.android.mms");
+                    mmsShareIntent.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(vcsInviteFile));
+                    mmsShareIntent.setType("text/x-vcalendar");
+                    chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS,
+                                           new Intent[]{mmsShareIntent});
+                }
+                startActivity(chooserIntent);
                 isShareSuccessful = true;
 
             } else {
diff --git a/src/com/android/calendar/icalendar/IcalendarUtils.java b/src/com/android/calendar/icalendar/IcalendarUtils.java
index ef96674b..e179926b 100644
--- a/src/com/android/calendar/icalendar/IcalendarUtils.java
+++ b/src/com/android/calendar/icalendar/IcalendarUtils.java
@@ -9,9 +9,12 @@ import android.util.Log;
 import com.android.calendar.CalendarEventModel;
 
 import java.io.File;
+import java.io.FileInputStream;
 import java.io.FileNotFoundException;
 import java.io.FileOutputStream;
 import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
 import java.text.SimpleDateFormat;
 import java.util.Calendar;
 import java.util.Date;
@@ -180,4 +183,53 @@ public class IcalendarUtils {
         // remove the local time zone's UTC offset
         return millis - TimeZone.getTimeZone(localTimeZone).getRawOffset();
     }
+
+    /**
+     * Copy the contents of a file into another
+     *
+     * @param src input / src file
+     * @param dst file to be copied into
+     */
+    public static boolean copyFile(File src, File dst) {
+        boolean isSuccessful = false;
+        InputStream in = null;
+        OutputStream out = null;
+        try {
+            in = new FileInputStream(src);
+            out = new FileOutputStream(dst);
+
+            byte[] buf = new byte[1024];
+
+            try {
+                for (int len; (len = in.read(buf)) > 0; ) {
+                    out.write(buf, 0, len);
+                }
+                isSuccessful = true;
+            } catch (IOException e) {
+                // ignore
+            }
+
+        } catch (FileNotFoundException fnf) {
+            // ignore
+        } finally {
+
+            if (in != null) {
+                try {
+                    in.close();
+                } catch (IOException e) {
+                    // ignore
+                }
+            }
+
+            if (out != null) {
+                try {
+                    out.close();
+                } catch (IOException e) {
+                    // ignore
+                }
+            }
+        }
+
+        return isSuccessful;
+    }
 }