Calendar : Add ability to import/export from sdcard

Change-Id: Ia2ae56b50bff764786cdd37b760eb6b94a63743f

16 files changed, 499 insertions, 42 deletions

diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 3e31e412..bb4bf3e3 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -27,6 +27,7 @@
     -->
 
     <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
+    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
     <uses-permission android:name="android.permission.GET_ACCOUNTS" />
     <uses-permission android:name="android.permission.MANAGE_ACCOUNTS"/>
     <uses-permission android:name="android.permission.INTERNET" />
@@ -156,6 +157,19 @@
             <meta-data android:name="android.app.searchable" android:resource="@xml/searchable"/>
         </activity>
 
+        <activity android:name="ImportActivity"
+            android:theme="@android:style/Theme.NoDisplay"
+            android:launchMode="singleTop">
+             <intent-filter>
+                <action android:name="android.intent.action.SEND" />
+                <category android:name="android.intent.category.DEFAULT" />
+                <data android:scheme="content" />
+                <data android:scheme="file" />
+                <data android:mimeType="text/x-vcalendar" />
+                <data android:mimeType="text/calendar" />
+            </intent-filter>
+        </activity>
+
         <activity android:name="DeleteEventsActivity"
             android:parentActivityName="com.android.calendar.AllInOneActivity"
             android:theme="@style/CalendarTheme.WithActionBar" >
diff --git a/res/drawable-hdpi/ic_menu_export.png b/res/drawable-hdpi/ic_menu_export.png
new file mode 100644
index 00000000..3fa4c80b
--- /dev/null
+++ b/res/drawable-hdpi/ic_menu_export.png
diff --git a/res/drawable-mdpi/ic_menu_export.png b/res/drawable-mdpi/ic_menu_export.png
new file mode 100644
index 00000000..1aa12976
--- /dev/null
+++ b/res/drawable-mdpi/ic_menu_export.png
diff --git a/res/drawable-xhdpi/ic_menu_export.png b/res/drawable-xhdpi/ic_menu_export.png
new file mode 100644
index 00000000..ccbaa1ba
--- /dev/null
+++ b/res/drawable-xhdpi/ic_menu_export.png
diff --git a/res/drawable-xxhdpi/ic_menu_export.png b/res/drawable-xxhdpi/ic_menu_export.png
new file mode 100644
index 00000000..8c60c7e0
--- /dev/null
+++ b/res/drawable-xxhdpi/ic_menu_export.png
diff --git a/res/menu/all_in_one_title_bar.xml b/res/menu/all_in_one_title_bar.xml
index 118eb5d1..94aebaae 100644
--- a/res/menu/all_in_one_title_bar.xml
+++ b/res/menu/all_in_one_title_bar.xml
@@ -63,4 +63,11 @@
         android:icon="@drawable/ic_menu_settings_holo_light"
         android:showAsAction="never"
         android:orderInCategory="8" />
+    <item
+        android:id="@+id/action_import"
+        android:alphabeticShortcut="i"
+        android:title="@string/cal_import_menu_title"
+        android:icon="@drawable/ic_menu_export"
+        android:showAsAction="never"
+        android:orderInCategory="9" />
 </menu>
diff --git a/res/menu/event_info_title_bar.xml b/res/menu/event_info_title_bar.xml
index 75623a44..c78beb31 100644
--- a/res/menu/event_info_title_bar.xml
+++ b/res/menu/event_info_title_bar.xml
@@ -36,10 +36,17 @@
         android:enabled="false"
         android:visible="false" />
     <item android:id="@+id/info_action_delete"
-        android:alphabeticShortcut="x"
+        android:alphabeticShortcut="d"
         android:title="@string/delete_label"
         android:icon="@drawable/ic_menu_trash_holo_light"
         android:showAsAction="always"
         android:enabled="false"
         android:visible="false" />
+    <item android:id="@+id/info_action_export"
+          android:alphabeticShortcut="x"
+          android:title="@string/cal_export_event_sdcard_title"
+          android:icon="@drawable/ic_menu_export"
+          android:showAsAction="always"
+          android:enabled="true"
+          android:visible="true" />
 </menu>
diff --git a/res/values/cm_strings.xml b/res/values/cm_strings.xml
index 5652b3ef..65409309 100644
--- a/res/values/cm_strings.xml
+++ b/res/values/cm_strings.xml
@@ -50,4 +50,12 @@
 
     <!-- Sharing calendar event -->
     <string name="cal_share_intent_title">Send event to:</string>
+
+    <string name="cal_export_event_sdcard_title">Export to sdcard</string>
+    <string name="cal_export_succ_msg">Event exported successfully : %1s</string>
+    <string name="cal_import_menu_title">Import event</string>
+    <string name="cal_nothing_to_import">Nothing to import</string>
+    <string name="cal_import_error_msg">Importing to calendar failed</string>
+    <string name="cal_pick_ics">Pick file to import</string>
+
 </resources>
diff --git a/src/com/android/calendar/AllInOneActivity.java b/src/com/android/calendar/AllInOneActivity.java
index d9e1a9ca..b43a1262 100644
--- a/src/com/android/calendar/AllInOneActivity.java
+++ b/src/com/android/calendar/AllInOneActivity.java
@@ -772,6 +772,9 @@ public class AllInOneActivity extends AbstractCalendarActivity implements EventH
             getMenuInflater().inflate(extensionMenuRes, menu);
         }
 
+        MenuItem item = menu.findItem(R.id.action_import);
+        item.setVisible(ImportActivity.hasThingsToImport(this));
+
         mSearchMenu = menu.findItem(R.id.action_search);
         mSearchView = (SearchView) mSearchMenu.getActionView();
         if (mSearchView != null) {
@@ -885,6 +888,8 @@ public class AllInOneActivity extends AbstractCalendarActivity implements EventH
             GoToDialogFragment goToFrg = GoToDialogFragment.newInstance(timeZone);
             goToFrg.show(getFragmentManager(), "goto");
             return true;
+        } else if (itemId == R.id.action_import) {
+            ImportActivity.pickImportFile(this);
         } else {
             return mExtensions.handleItemSelected(item, this);
         }
diff --git a/src/com/android/calendar/EventInfoFragment.java b/src/com/android/calendar/EventInfoFragment.java
index 90f73b02..4374226e 100644
--- a/src/com/android/calendar/EventInfoFragment.java
+++ b/src/com/android/calendar/EventInfoFragment.java
@@ -48,6 +48,7 @@ import android.graphics.Rect;
 import android.graphics.drawable.Drawable;
 import android.net.Uri;
 import android.os.Bundle;
+import android.os.Environment;
 import android.provider.CalendarContract;
 import android.provider.CalendarContract.Attendees;
 import android.provider.CalendarContract.Calendars;
@@ -185,6 +186,14 @@ public class EventInfoFragment extends DialogFragment implements OnCheckedChange
             | TOKEN_QUERY_ATTENDEES | TOKEN_QUERY_CALENDARS | TOKEN_QUERY_EVENT
             | TOKEN_QUERY_REMINDERS | TOKEN_QUERY_VISIBLE_CALENDARS | TOKEN_QUERY_COLORS;
 
+    public static final File EXPORT_SDCARD_DIRECTORY = new File(
+            Environment.getExternalStorageDirectory(), "CalendarEvents");
+
+    private enum ShareType {
+        SDCARD,
+        INTENT
+    }
+
     private int mCurrentQuery = 0;
 
     private static final String[] EVENT_PROJECTION = new String[] {
@@ -1258,7 +1267,9 @@ public class EventInfoFragment extends DialogFragment implements OnCheckedChange
         } else if (itemId == R.id.info_action_change_color) {
             showEventColorPickerDialog();
         } else if (itemId == R.id.info_action_share_event) {
-            shareEvent();
+            shareEvent(ShareType.INTENT);
+        } else if (itemId == R.id.info_action_export) {
+            shareEvent(ShareType.SDCARD);
         }
         return super.onOptionsItemSelected(item);
     }
@@ -1267,7 +1278,7 @@ public class EventInfoFragment extends DialogFragment implements OnCheckedChange
      * Generates an .ics formatted file with the event info and launches intent chooser to
      * share said file
      */
-    private void shareEvent() {
+    private void shareEvent(ShareType type) {
         // Create the respective ICalendar objects from the event info
         VCalendar calendar = new VCalendar();
         calendar.addProperty(VCalendar.VERSION, "2.0");
@@ -1330,37 +1341,62 @@ public class EventInfoFragment extends DialogFragment implements OnCheckedChange
                 // prefix length constraint is imposed by File#createTempFile
                 filePrefix = "invite";
             }
-            File inviteFile = File.createTempFile(filePrefix, ".ics",
-                    mActivity.getExternalCacheDir());
+
+            filePrefix = filePrefix.replaceAll("\\W+", " ");
+
+            if (!filePrefix.endsWith(" ")) {
+                filePrefix += " ";
+            }
+
+            File dir;
+            if (type == ShareType.SDCARD) {
+                dir = EXPORT_SDCARD_DIRECTORY;
+                if (!dir.exists()) {
+                    dir.mkdir();
+                }
+            } else {
+                dir = mActivity.getExternalCacheDir();
+            }
+
+            File inviteFile = IcalendarUtils.createTempFile(filePrefix, ".ics",
+                    dir);
+
             if (IcalendarUtils.writeCalendarToFile(calendar, inviteFile)) {
-                inviteFile.setReadable(true,false);     // set world-readable
-                Intent shareIntent = new Intent();
-                shareIntent.setAction(Intent.ACTION_SEND);
-                shareIntent.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(inviteFile));
-                // 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");
-
-                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});
+                if (type == ShareType.INTENT) {
+                    inviteFile.setReadable(true, false);     // set world-readable
+                    Intent shareIntent = new Intent();
+                    shareIntent.setAction(Intent.ACTION_SEND);
+                    shareIntent.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(inviteFile));
+                    // 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");
+
+                    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);
+                } else {
+                    String msg = getString(R.string.cal_export_succ_msg);
+                    Toast.makeText(mActivity, String.format(msg, inviteFile),
+                            Toast.LENGTH_SHORT).show();
                 }
-                startActivity(chooserIntent);
                 isShareSuccessful = true;
 
             } else {
@@ -1368,6 +1404,7 @@ public class EventInfoFragment extends DialogFragment implements OnCheckedChange
                 isShareSuccessful = false;
             }
         } catch (IOException e) {
+            e.printStackTrace();
             isShareSuccessful = false;
         }
 
diff --git a/src/com/android/calendar/ImportActivity.java b/src/com/android/calendar/ImportActivity.java
new file mode 100644
index 00000000..0a4a89a1
--- /dev/null
+++ b/src/com/android/calendar/ImportActivity.java
@@ -0,0 +1,186 @@
+package com.android.calendar;
+
+import android.app.Activity;
+import android.app.AlertDialog;
+import android.content.ActivityNotFoundException;
+import android.content.ContentResolver;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.net.Uri;
+import android.os.AsyncTask;
+import android.os.Bundle;
+import android.provider.CalendarContract;
+import android.text.TextUtils;
+import android.widget.Toast;
+import com.android.calendar.icalendar.Attendee;
+import com.android.calendar.icalendar.IcalendarUtils;
+import com.android.calendar.icalendar.VCalendar;
+import com.android.calendar.icalendar.VEvent;
+
+import java.io.File;
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
+import java.util.LinkedList;
+import java.util.TimeZone;
+
+public class ImportActivity extends Activity {
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        if (!isValidIntent()) {
+            Toast.makeText(this, R.string.cal_nothing_to_import, Toast.LENGTH_SHORT).show();
+            finish();
+        } else {
+            parseCalFile();
+        }
+    }
+
+    private long getLocalTimeFromString(String iCalDate) {
+        SimpleDateFormat format = new SimpleDateFormat("yyyyMMdd'T'HHmmss'Z'");
+        format.setTimeZone(TimeZone.getTimeZone("UTC"));
+
+        try {
+            format.parse(iCalDate);
+            format.setTimeZone(TimeZone.getDefault());
+            return format.getCalendar().getTimeInMillis();
+        } catch (ParseException e) {
+            e.printStackTrace();
+        }
+
+        return System.currentTimeMillis();
+    }
+
+    private void showErrorToast() {
+        Toast.makeText(this, R.string.cal_import_error_msg, Toast.LENGTH_SHORT).show();
+        finish();
+    }
+
+    private void parseCalFile() {
+        Uri uri = getIntent().getData();
+        VCalendar calendar = IcalendarUtils.readCalendarFromFile(this, uri);
+
+        if (calendar == null) {
+            showErrorToast();
+            return;
+        }
+
+        Intent calIntent = new Intent(Intent.ACTION_INSERT);
+        calIntent.setType("vnd.android.cursor.item/event");
+
+        LinkedList<VEvent> events = calendar.getAllEvents();
+        if (events == null) {
+            showErrorToast();
+            return;
+        }
+
+        VEvent firstEvent = calendar.getAllEvents().getFirst();
+        calIntent.putExtra(CalendarContract.Events.TITLE,
+                IcalendarUtils.uncleanseString(firstEvent.getProperty(VEvent.SUMMARY)));
+        calIntent.putExtra(CalendarContract.Events.EVENT_LOCATION,
+                IcalendarUtils.uncleanseString(firstEvent.getProperty(VEvent.LOCATION)));
+        calIntent.putExtra(CalendarContract.Events.DESCRIPTION,
+                IcalendarUtils.uncleanseString(firstEvent.getProperty(VEvent.DESCRIPTION)));
+        calIntent.putExtra(CalendarContract.Events.ORGANIZER,
+                IcalendarUtils.uncleanseString(firstEvent.getProperty(VEvent.ORGANIZER)));
+
+        if (firstEvent.mAttendees.size() > 0) {
+            StringBuilder builder = new StringBuilder();
+            for (Attendee attendee : firstEvent.mAttendees) {
+                builder.append(attendee.mEmail);
+                builder.append(",");
+            }
+            calIntent.putExtra(Intent.EXTRA_EMAIL, builder.toString());
+        }
+
+        String dtStart = firstEvent.getProperty(VEvent.DTSTART);
+        if (!TextUtils.isEmpty(dtStart)) {
+            calIntent.putExtra(CalendarContract.EXTRA_EVENT_BEGIN_TIME,
+                    getLocalTimeFromString(dtStart));
+        }
+
+        String dtEnd = firstEvent.getProperty(VEvent.DTEND);
+        if (!TextUtils.isEmpty(dtEnd)) {
+            calIntent.putExtra(CalendarContract.EXTRA_EVENT_END_TIME,
+                    getLocalTimeFromString(dtEnd));
+        }
+
+        try {
+            startActivity(calIntent);
+        } catch (ActivityNotFoundException e) {
+            // Oh well...
+        } finally {
+            finish();
+        }
+    }
+
+    private boolean isValidIntent() {
+        Intent intent = getIntent();
+        if (intent == null) {
+            return false;
+        }
+        Uri fileUri = intent.getData();
+        if (fileUri == null) {
+            return false;
+        }
+        String scheme = fileUri.getScheme();
+        return ContentResolver.SCHEME_CONTENT.equals(scheme)
+                || ContentResolver.SCHEME_FILE.equals(scheme);
+    }
+
+    private static class ListFilesTask extends AsyncTask<Void, Void, String[]> {
+
+        private final Activity mActivity;
+
+        public ListFilesTask(Activity activity) {
+            mActivity = activity;
+        }
+
+        @Override
+        protected String[] doInBackground(Void... params) {
+            if (!hasThingsToImport(mActivity)) {
+                return null;
+            }
+            File folder = EventInfoFragment.EXPORT_SDCARD_DIRECTORY;
+            String[] result = null;
+            if (folder.exists()) {
+                result = folder.list();
+            }
+            return result;
+        }
+
+        @Override
+        protected void onPostExecute(final String[] files) {
+            if (files == null || files.length == 0) {
+                Toast.makeText(mActivity, R.string.cal_nothing_to_import,
+                        Toast.LENGTH_SHORT).show();
+                return;
+            }
+
+            AlertDialog.Builder builder = new AlertDialog.Builder(mActivity);
+            builder.setTitle(R.string.cal_pick_ics)
+                    .setItems(files, new DialogInterface.OnClickListener() {
+                        public void onClick(DialogInterface dialog, int which) {
+                            Intent i = new Intent(mActivity, ImportActivity.class);
+                            File f = new File(EventInfoFragment.EXPORT_SDCARD_DIRECTORY,
+                                    files[which]);
+                            i.setData(Uri.fromFile(f));
+                            mActivity.startActivity(i);
+                        }
+                    });
+            builder.show();
+        }
+
+    }
+
+    public static void pickImportFile(Activity activity) {
+        new ListFilesTask(activity).execute();
+    }
+
+    public static boolean hasThingsToImport(Context context) {
+        File folder = EventInfoFragment.EXPORT_SDCARD_DIRECTORY;
+        return folder.exists() && folder.list().length > 0;
+    }
+
+}
diff --git a/src/com/android/calendar/icalendar/Attendee.java b/src/com/android/calendar/icalendar/Attendee.java
index fc8c78bb..c3c2ba84 100644
--- a/src/com/android/calendar/icalendar/Attendee.java
+++ b/src/com/android/calendar/icalendar/Attendee.java
@@ -5,6 +5,7 @@
 package com.android.calendar.icalendar;
 
 import java.util.HashMap;
+import java.util.ListIterator;
 
 /**
  * Models the Attendee component of a calendar event
@@ -74,4 +75,13 @@ public class Attendee {
         return output.toString();
     }
 
+    public void populateFromEntries(ListIterator<String> iter) {
+        String line = iter.next();
+        if (line.contains("ATTENDEE")) {
+            String entry = VEvent.parseTillNextAttribute(iter, line);
+            String[] entries = entry.split("X-NUM-GUESTS=0:mailto:");
+            mEmail = entries[1];
+        }
+    }
+
 }
diff --git a/src/com/android/calendar/icalendar/IcalendarUtils.java b/src/com/android/calendar/icalendar/IcalendarUtils.java
index e179926b..efbb4583 100644
--- a/src/com/android/calendar/icalendar/IcalendarUtils.java
+++ b/src/com/android/calendar/icalendar/IcalendarUtils.java
@@ -4,20 +4,17 @@
 
 package com.android.calendar.icalendar;
 
+import android.content.ContentResolver;
+import android.content.Context;
+import android.net.Uri;
 import android.provider.CalendarContract;
-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.io.*;
 import java.text.SimpleDateFormat;
+import java.util.ArrayList;
 import java.util.Calendar;
-import java.util.Date;
+import java.util.Random;
 import java.util.TimeZone;
 
 /**
@@ -25,7 +22,21 @@ import java.util.TimeZone;
  */
 public class IcalendarUtils {
 
-    private static int sPermittedLineLength = 75; // Line length mandated by iCalendar format
+    public static int sPermittedLineLength = 75; // Line length mandated by iCalendar format
+    private static final Random tempFileRandom = new Random();
+
+    public static String uncleanseString(CharSequence sequence) {
+        if (sequence == null) return null;
+        String input = sequence.toString();
+
+        // reintroduce new lines with the literal '\n'
+        input = input.replaceAll("\\\\n", "\n");
+        // reintroduce semicolons and commas
+        input = input.replaceAll("\\\\;", ";");
+        input = input.replaceAll("\\\\\\,", ",");
+
+        return input;
+    }
 
     /**
      * ensure the string conforms to the iCalendar encoding requirements
@@ -47,6 +58,99 @@ public class IcalendarUtils {
     }
 
     /**
+     * Creates an empty temporary file in the given directory using the given
+     * prefix and suffix as part of the file name. If {@code suffix} is null, {@code .tmp} is used.
+     *
+     * <p>Note that this method does <i>not</i> call {@link #deleteOnExit}, but see the
+     * documentation for that method before you call it manually.
+     *
+     * @param prefix
+     *            the prefix to the temp file name.
+     * @param suffix
+     *            the suffix to the temp file name.
+     * @param directory
+     *            the location to which the temp file is to be written, or
+     *            {@code null} for the default location for temporary files,
+     *            which is taken from the "java.io.tmpdir" system property. It
+     *            may be necessary to set this property to an existing, writable
+     *            directory for this method to work properly.
+     * @return the temporary file.
+     * @throws IllegalArgumentException
+     *             if the length of {@code prefix} is less than 3.
+     * @throws IOException
+     *             if an error occurs when writing the file.
+     */
+    public static File createTempFile(String prefix, String suffix, File directory)
+            throws IOException {
+        // Force a prefix null check first
+        if (prefix.length() < 3) {
+            throw new IllegalArgumentException("prefix must be at least 3 characters");
+        }
+        if (suffix == null) {
+            suffix = ".tmp";
+        }
+        File tmpDirFile = directory;
+        if (tmpDirFile == null) {
+            String tmpDir = System.getProperty("java.io.tmpdir", ".");
+            tmpDirFile = new File(tmpDir);
+        }
+        File result;
+        do {
+            result = new File(tmpDirFile,
+                    prefix + tempFileRandom.nextInt(Integer.MAX_VALUE) + suffix);
+        } while (!result.createNewFile());
+        return result;
+    }
+
+    public static VCalendar readCalendarFromFile(Context context, Uri uri) {
+        ArrayList<String> contents = getStringArrayFromFile(context, uri);
+        if (contents == null || contents.isEmpty()) {
+            return null;
+        }
+        VCalendar calendar = new VCalendar();
+        calendar.populateFromString(contents);
+        return calendar;
+    }
+
+    public static ArrayList<String> getStringArrayFromFile(Context context, Uri uri) {
+        String scheme = uri.getScheme();
+        InputStream inputStream = null;
+        if(ContentResolver.SCHEME_CONTENT.equals(scheme)) {
+            try {
+                inputStream = context.getContentResolver().openInputStream(uri);
+            } catch (FileNotFoundException e) {
+                e.printStackTrace();
+            }
+        } else if (ContentResolver.SCHEME_FILE.equals(scheme)) {
+            File f = new File(uri.getPath());
+            try {
+                inputStream = new FileInputStream(f);
+            } catch (FileNotFoundException e) {
+                e.printStackTrace();
+            }
+        }
+
+        if (inputStream == null) {
+            return null;
+        }
+
+        ArrayList<String> result = new ArrayList<String>();
+
+        try {
+            BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
+            String line;
+            while ((line = reader.readLine()) != null) {
+                result.add(line);
+            }
+        } catch (FileNotFoundException e) {
+            e.printStackTrace();
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        return result;
+    }
+
+    /**
      * Stringify VCalendar object and write to file
      * @param calendar
      * @param file
diff --git a/src/com/android/calendar/icalendar/Organizer.java b/src/com/android/calendar/icalendar/Organizer.java
index 2e039849..9f9780d5 100644
--- a/src/com/android/calendar/icalendar/Organizer.java
+++ b/src/com/android/calendar/icalendar/Organizer.java
@@ -39,4 +39,12 @@ public class Organizer {
         return output.toString();
     }
 
+    public static Organizer populateFromICalString(String iCalFormattedString) {
+        // TODO add santiy checks
+        String[] organizer = iCalFormattedString.split(";");
+        String[] entries = organizer[1].split(":");
+        String name = entries[0].replace("CN=", "");
+        String email = entries[1].replace("mailto=", "");
+        return new Organizer(name, email);
+    }
 }
diff --git a/src/com/android/calendar/icalendar/VCalendar.java b/src/com/android/calendar/icalendar/VCalendar.java
index 00c7b81b..9f422e6f 100644
--- a/src/com/android/calendar/icalendar/VCalendar.java
+++ b/src/com/android/calendar/icalendar/VCalendar.java
@@ -4,8 +4,12 @@
 
 package com.android.calendar.icalendar;
 
+import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.HashMap;
 import java.util.LinkedList;
+import java.util.List;
+import java.util.ListIterator;
 
 /**
  * Models the Calendar/VCalendar component of the iCalendar format
@@ -102,6 +106,29 @@ public class VCalendar {
         return output.toString();
     }
 
+    public void populateFromString(ArrayList<String> input) {
+        ListIterator<String> iter = input.listIterator();
+
+        while (iter.hasNext()) {
+            String line = iter.next();
+            if (line.contains("BEGIN:VEVENT")) {
+                // Go one previous, so VEvent, parses current line
+                iter.previous();
+
+                // Offload to vevent for parsing
+                VEvent event = new VEvent();
+                event.populateFromEntries(iter);
+                mEvents.add(event);
+            } else if (line.contains("END:VCALENDAR")) {
+                break;
+            }
+        }
+    }
+
+    public String getProperty(String key) {
+        return mProperties.get(key);
+    }
+
     /**
      * TODO: Aggressive validation of VCalendar and all of its components to ensure they conform
      * to the ical specification
diff --git a/src/com/android/calendar/icalendar/VEvent.java b/src/com/android/calendar/icalendar/VEvent.java
index 1aff0bd4..672aa18b 100644
--- a/src/com/android/calendar/icalendar/VEvent.java
+++ b/src/com/android/calendar/icalendar/VEvent.java
@@ -6,6 +6,7 @@ package com.android.calendar.icalendar;
 
 import java.util.HashMap;
 import java.util.LinkedList;
+import java.util.ListIterator;
 import java.util.UUID;
 
 /**
@@ -173,4 +174,47 @@ public class VEvent {
         return sb.toString();
     }
 
+    public void populateFromEntries(ListIterator<String> iter) {
+        while (iter.hasNext()) {
+            String line = iter.next();
+            if (line.contains("BEGIN:VEVENT")) {
+                // Continue
+            } else if (line.startsWith("END:EVENT")) {
+                break;
+            } else if (line.startsWith("ORGANIZER")) {
+                String entry = parseTillNextAttribute(iter, line);
+                mOrganizer = Organizer.populateFromICalString(entry);
+            } else if (line.startsWith("ATTENDEE")) {
+                // Go one previous, so VEvent, parses current line
+                iter.previous();
+
+                // Offload to Attendee for parsing
+                Attendee attendee = new Attendee();
+                attendee.populateFromEntries(iter);
+                mAttendees.add(attendee);
+            } else if (line.contains(":")) {
+                String entry = parseTillNextAttribute(iter, line);
+                int indexOfFirstColon = entry.indexOf(":");
+                String key = entry.substring(0, indexOfFirstColon);
+                String value = entry.substring(indexOfFirstColon + 1);
+                mProperties.put(key, value);
+            }
+        }
+    }
+
+    public static String parseTillNextAttribute(ListIterator<String> iter, String currentLine) {
+        StringBuilder parse = new StringBuilder();
+        parse.append(currentLine);
+        while (iter.hasNext()) {
+            String line = iter.next();
+            if (line.startsWith(" ")) {
+                parse.append(line.replaceFirst(" ", ""));
+            } else {
+                iter.previous();
+                break;
+            }
+        }
+        return parse.toString();
+    }
+
 }