Journal item: implement showing calendar events (based on etar)

This shows the calendar events in a nicer way based on Etar[1] which is
in turn based on the AOSP calendar.

1: https://github.com/Etar-Group/Etar-Calendar/

app/src/main/java/com/etesync/syncadapter/ui/JournalItemActivity.java

@@ -2,12 +2,16 @@ package com.etesync.syncadapter.ui;
 
 import android.content.Context;
 import android.content.Intent;
+import android.os.AsyncTask;
 import android.os.Bundle;
 import android.support.design.widget.TabLayout;
 import android.support.v4.app.Fragment;
 import android.support.v4.app.FragmentManager;
 import android.support.v4.app.FragmentPagerAdapter;
 import android.support.v4.view.ViewPager;
+import android.text.format.DateFormat;
+import android.text.format.DateUtils;
+import android.text.format.Time;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
@@ -20,6 +24,19 @@ import com.etesync.syncadapter.model.CollectionInfo;
 import com.etesync.syncadapter.model.JournalEntity;
 import com.etesync.syncadapter.model.SyncEntry;
 
+import net.fortuna.ical4j.model.component.VAlarm;
+import net.fortuna.ical4j.model.property.Attendee;
+
+import org.apache.commons.codec.Charsets;
+
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.Formatter;
+import java.util.Locale;
+
+import at.bitfire.ical4android.Event;
+import at.bitfire.ical4android.InvalidCalendarException;
 import io.requery.Persistable;
 import io.requery.sql.EntityDataStore;
 
@@ -102,7 +119,11 @@ public class JournalItemActivity extends BaseActivity implements Refreshable {
 
         @Override
         public Fragment getItem(int position) {
-            return TextFragment.newInstance(syncEntry);
+            if (position == 0) {
+                return EventFragment.newInstance(info, syncEntry);
+            } else {
+                return TextFragment.newInstance(syncEntry);
+            }
         }
     }
 
@@ -128,6 +149,140 @@ public class JournalItemActivity extends BaseActivity implements Refreshable {
         }
     }
 
+    public static class EventFragment extends Fragment {
+        CollectionInfo info;
+        SyncEntry syncEntry;
+
+        public static EventFragment newInstance(CollectionInfo info, SyncEntry syncEntry) {
+            EventFragment frag = new EventFragment();
+            Bundle args = new Bundle(1);
+            args.putSerializable(Constants.KEY_COLLECTION_INFO, info);
+            args.putSerializable(KEY_SYNC_ENTRY, syncEntry);
+            frag.setArguments(args);
+            return frag;
+        }
+
+        @Override
+        public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
+            View v = inflater.inflate(R.layout.event_info, container, false);
+
+            info = (CollectionInfo) getArguments().getSerializable(Constants.KEY_COLLECTION_INFO);
+            syncEntry = (SyncEntry) getArguments().getSerializable(KEY_SYNC_ENTRY);
+
+            new LoadEventTask(v).execute();
+
+            return v;
+        }
+
+        private class LoadEventTask extends AsyncTask<Void, Void, Event> {
+            View view;
+            LoadEventTask(View v) {
+                super();
+                view = v;
+            }
+            @Override
+            protected Event doInBackground(Void... aVoids) {
+                InputStream is = new ByteArrayInputStream(syncEntry.getContent().getBytes(Charsets.UTF_8));
+
+                try {
+                    Event event = Event.fromStream(is, Charsets.UTF_8, null)[0];
+                    return event;
+                } catch (InvalidCalendarException e) {
+                    e.printStackTrace();
+                } catch (IOException e) {
+                    e.printStackTrace();
+                }
+
+                return null;
+            }
+
+            @Override
+            protected void onPostExecute(Event event) {
+                final View loader = view.findViewById(R.id.event_info_loading_msg);
+                loader.setVisibility(View.GONE);
+                final View contentContainer = view.findViewById(R.id.event_info_scroll_view);
+                contentContainer.setVisibility(View.VISIBLE);
+
+                setTextViewText(view, R.id.title, event.summary);
+
+                setTextViewText(view, R.id.when_datetime, getDisplayedDatetime(event.dtStart.getDate().getTime(), event.dtEnd.getDate().getTime(), event.isAllDay(), getContext()));
+
+                setTextViewText(view, R.id.where, event.location);
+
+                if (event.organizer != null) {
+                    TextView tv = (TextView) view.findViewById(R.id.organizer);
+                    tv.setText(event.organizer.getCalAddress().toString().replaceFirst("mailto:", ""));
+                } else {
+                    View organizer = view.findViewById(R.id.organizer_container);
+                    organizer.setVisibility(View.GONE);
+                }
+
+                setTextViewText(view, R.id.description, event.description);
+
+                boolean first = true;
+                StringBuilder sb = new StringBuilder();
+                for (Attendee attendee : event.attendees) {
+                    if (first) {
+                        first = false;
+                        sb.append("Attendees: ");
+                    } else {
+                        sb.append(", ");
+                    }
+                    sb.append(attendee.getCalAddress().toString().replaceFirst("mailto:", ""));
+                }
+                setTextViewText(view, R.id.attendees, sb.toString());
+
+                first = true;
+                sb = new StringBuilder();
+                for (VAlarm alarm : event.alarms) {
+                    if (first) {
+                        first = false;
+                        sb.append("Reminders: ");
+                    } else {
+                        sb.append(", ");
+                    }
+                    sb.append(alarm.getTrigger().getValue());
+                }
+                setTextViewText(view, R.id.reminders, sb.toString());
+            }
+        }
+
+        private static void setTextViewText(View parent, int id, String text) {
+            TextView tv = (TextView) parent.findViewById(id);
+            if (text == null) {
+                tv.setVisibility(View.GONE);
+            } else {
+                tv.setText(text);
+            }
+        }
+
+        public static String getDisplayedDatetime(long startMillis, long endMillis, boolean allDay, Context context) {
+            // Configure date/time formatting.
+            int flagsDate = DateUtils.FORMAT_SHOW_DATE | DateUtils.FORMAT_SHOW_WEEKDAY;
+            int flagsTime = DateUtils.FORMAT_SHOW_TIME;
+            if (DateFormat.is24HourFormat(context)) {
+                flagsTime |= DateUtils.FORMAT_24HOUR;
+            }
+
+            String datetimeString = null;
+            if (allDay) {
+                // For multi-day allday events or single-day all-day events that are not
+                // today or tomorrow, use framework formatter.
+                Formatter f = new Formatter(new StringBuilder(50), Locale.getDefault());
+                datetimeString = DateUtils.formatDateRange(context, f, startMillis,
+                        endMillis, flagsDate, Time.TIMEZONE_UTC).toString();
+            } else {
+                // For multiday events, shorten day/month names.
+                // Example format: "Fri Apr 6, 5:00pm - Sun, Apr 8, 6:00pm"
+                int flagsDatetime = flagsDate | flagsTime | DateUtils.FORMAT_ABBREV_MONTH |
+                        DateUtils.FORMAT_ABBREV_WEEKDAY;
+                datetimeString = DateUtils.formatDateRange(context, startMillis, endMillis,
+                        flagsDatetime);
+            }
+            return datetimeString;
+        }
+    }
+
     @Override
     protected void onResume() {
         super.onResume();

app/src/main/res/layout/event_info.xml

@@ -0,0 +1,116 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2006 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.
+-->
+<FrameLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:background="#fafafa"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:padding="0dp">
+    <RelativeLayout
+        android:id="@+id/event_info_loading_msg"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent">
+        <ProgressBar
+            android:id="@+id/event_info_progress_bar"
+            android:layout_width="100dip"
+            android:layout_height="100dip"
+            android:indeterminate="true"
+            android:layout_centerInParent="true" />
+        <TextView
+            android:layout_below="@id/event_info_progress_bar"
+            android:layout_centerHorizontal="true"
+            android:layout_marginTop="16dip"
+            android:text="@string/loading"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content" />
+    </RelativeLayout>
+    <ScrollView
+        xmlns:android="http://schemas.android.com/apk/res/android"
+        android:id="@+id/event_info_scroll_view"
+        android:orientation="vertical"
+        android:layout_width="match_parent"
+        android:fadingEdge="none"
+        android:animateLayoutChanges="true"
+        android:visibility="gone"
+        android:layout_height="match_parent" >
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="vertical">
+
+            <!--  Container for the event's headline
+                  Name, Date, Time & Location
+            -->
+            <include layout="@layout/event_info_headline" />
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:paddingLeft="16dip"
+                android:paddingRight="16dip"
+                android:layout_marginTop="8dip"
+                android:orientation="vertical">
+
+                <!-- Organizer -->
+                <LinearLayout
+                    android:id="@+id/organizer_container"
+                    android:visibility="gone"
+                    android:paddingRight="16dip"
+                    android:orientation="horizontal"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content">
+                    <TextView
+                        android:id="@+id/organizer_label"
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:singleLine="true"
+                        android:text="@string/event_info_organizer"
+                        style="?android:attr/textAppearanceSmall"
+                        android:textSize="14sp"/>
+                    <TextView
+                        android:id="@+id/organizer"
+                        android:layout_width="0px"
+                        android:layout_height="wrap_content"
+                        android:ellipsize="end"
+                        android:layout_weight="1"
+                        android:singleLine="true"
+                        android:layout_marginLeft="2dip"
+                        android:textIsSelectable="true"
+                        style="?android:attr/textAppearanceSmall"
+                        android:textSize="14sp"/>
+                </LinearLayout>
+
+                <!-- DESCRIPTION -->
+                <TextView
+                    android:id="@+id/description"
+                    android:layout_height="wrap_content"
+                    android:layout_width="match_parent"/>
+
+                <TextView
+                    android:id="@+id/attendees"
+                    android:layout_height="wrap_content"
+                    android:layout_width="match_parent"/>
+
+                <TextView
+                    android:id="@+id/reminders"
+                    android:layout_height="wrap_content"
+                    android:layout_width="match_parent"/>
+            </LinearLayout>
+
+        </LinearLayout>
+    </ScrollView>
+</FrameLayout>

app/src/main/res/layout/event_info_headline.xml

@@ -0,0 +1,82 @@
+<?xml version="1.0" encoding="utf-8"?><!--
+     Copyright (C) 2013 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.
+-->
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/event_info_headline"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:layout_weight="1"
+    android:background="@color/orange400"
+    android:orientation="vertical"
+    android:paddingBottom="16dip"
+    android:paddingLeft="16dip"
+    android:paddingRight="16dip"
+    android:paddingTop="8dip">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="horizontal">
+
+        <!-- WHAT -->
+        <TextView
+            android:id="@+id/title"
+            style="?android:attr/textAppearanceLarge"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight=".8"
+            android:autoLink="all"
+            android:textColor="@color/White"
+            android:textIsSelectable="true"
+            android:textSize="24sp"
+            android:textStyle="bold" />
+    </LinearLayout>
+
+    <!-- WHEN -->
+
+    <TextView
+        android:id="@+id/when_datetime"
+        style="?android:attr/textAppearanceLarge"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="4dip"
+        android:textColor="@color/White"
+        android:textIsSelectable="true"
+        android:textSize="14sp" />
+
+    <TextView
+        android:id="@+id/when_repeat"
+        style="?android:attr/textAppearanceLarge"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="-3dip"
+        android:textColor="@color/White"
+        android:textSize="14sp" />
+
+    <!-- WHERE -->
+
+    <TextView
+        android:id="@+id/where"
+        style="?android:attr/textAppearanceLarge"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="4dip"
+        android:ellipsize="end"
+        android:singleLine="false"
+        android:textColor="@color/White"
+        android:textIsSelectable="true"
+        android:textSize="14sp" />
+
+</LinearLayout>

app/src/main/res/layout/text_fragment.xml

@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:background="#fafafa"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:orientation="vertical">

app/src/main/res/layout/view_collection_members.xml

@@ -25,7 +25,6 @@
     </LinearLayout>
 
     <LinearLayout
-        android:id="@+id/add_member"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:layout_margin="@dimen/activity_margin"

app/src/main/res/values/dimen.xml

@@ -13,5 +13,4 @@
     <dimen name="fab_margin">16dp</dimen>
 
     <dimen name="nav_header_vertical_spacing">16dp</dimen>
-
 </resources>

app/src/main/res/values/strings.xml

@@ -7,7 +7,7 @@
   ~ http://www.gnu.org/licenses/gpl.html
   -->
 
-<resources xmlns:tools="http://schemas.android.com/tools">
+<resources xmlns:tools="http://schemas.android.com/tools" xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
 
     <!-- common strings -->
     <string name="app_name">EteSync</string>
@@ -249,7 +249,6 @@
     <string name="delete_collection_confirm_title">Are you sure?</string>
     <string name="delete_collection_confirm_warning">This collection (%s) and all its data will be removed from the server.</string>
     <string name="delete_collection_deleting_collection">Deleting collection</string>
-    <string name="collection_stats_title">Stats</string>
 
     <!-- JournalViewer -->
     <string name="journal_entries_list_empty">No entries found for this journal</string>
@@ -300,4 +299,6 @@
     <string name="import_button_local">From Account</string>
     <string name="import_select_account">Select Account</string>
 
+    <!-- Event (from Etar) -->
+    <string name="event_info_organizer">Organizer:</string>
 </resources>