Apply scheduled updates to preplanned map area

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
// Copyright 2019 Esri.
//
// 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.

using ArcGISRuntime;
using ArcGISRuntime.Samples.Managers;
using Esri.ArcGISRuntime.Mapping;
using Esri.ArcGISRuntime.Tasks;
using Esri.ArcGISRuntime.Tasks.Offline;
using Esri.ArcGISRuntime.UI.Controls;
using Foundation;
using System;
using System.IO;
using System.Linq;
using UIKit;

namespace ArcGISRuntimeXamarin.Samples.ApplyScheduledUpdates
{
    [Register("ApplyScheduledUpdates")]
    [ArcGISRuntime.Samples.Shared.Attributes.Sample(
        name: "Apply scheduled updates to preplanned map area",
        category: "Map",
        description: "Apply scheduled updates to a downloaded preplanned map area.",
        instructions: "Start the app. It will display an offline map, check for available updates, and show update availability and size. Select 'Apply Updates' to apply the updates to the local offline map and show the results.",
        tags: new[] { "offline", "pre-planned", "preplanned", "synchronize", "update" })]
    [ArcGISRuntime.Samples.Shared.Attributes.OfflineData()]
    public class ApplyScheduledUpdates : UIViewController
    {
        // Hold references to UI controls.
        private MapView _myMapView;
        private UIToolbar _toolbar;
        private UIBarButtonItem _applyButton;
        private UILabel _statusLabel;

        // Mobile map package.
        private MobileMapPackage _mobileMapPackage;

        // Task used to sync the mobile map package.
        private OfflineMapSyncTask _offlineMapSyncTask;

        // ArcGIS online item id for the mobile map package.
        private const string _itemId = "740b663bff5e4198b9b6674af93f638a";

        // Path to the mobile map package.
        private string _mapPackagePath;

        public ApplyScheduledUpdates()
        {
            Title = "Apply scheduled updates to preplanned map area";
        }

        private async void Initialize()
        {
            try
            {
                // Clear the exiting sample data.
                Directory.Delete(DataManager.GetDataFolder(_itemId, ""), true);
            }
            catch (IOException)
            {
                // Do nothing. Exception happens when sample hasn't been run before and data isn't already present.
            }

            try
            {
                // Download the mobile map package using the sample viewer's data manager.
                await DataManager.DownloadDataItem(_itemId);

                // Get the folder path to the mobile map package.
                _mapPackagePath = DataManager.GetDataFolder(_itemId, "");

                // Load the mobile map package.
                _mobileMapPackage = new MobileMapPackage(_mapPackagePath);
                await _mobileMapPackage.LoadAsync();

                // Set the mapview to the map from the package.
                Map offlineMap = _mobileMapPackage.Maps[0];
                _myMapView.Map = offlineMap;

                // Create an offline map sync task for the map.
                _offlineMapSyncTask = await OfflineMapSyncTask.CreateAsync(offlineMap);

                // Check if there are scheduled updates to the preplanned map area.
                CheckForScheduledUpdates();
            }
            catch (Exception ex)
            {
                new UIAlertView("Error", ex.Message, (IUIAlertViewDelegate)null, "OK", null).Show();
            }
        }

        private async void CheckForScheduledUpdates()
        {
            try
            {
                // Get the information for offline updates.
                OfflineMapUpdatesInfo info = await _offlineMapSyncTask.CheckForUpdatesAsync();

                // Check if there are updates that can be downloaded.
                if (info.DownloadAvailability == OfflineUpdateAvailability.Available)
                {
                    // Get the size of the update.
                    double updateSize = info.ScheduledUpdatesDownloadSize / 1024;

                    // Update the UI.
                    _statusLabel.Text = $"Updates: {info.DownloadAvailability}\nUpdate size: {updateSize} kilobytes.";
                    _applyButton.Enabled = true;
                }
                else
                {
                    // Update the UI.
                    _statusLabel.Text = $"Updates: {info.DownloadAvailability}\nThe preplanned map area is up to date.";
                    _applyButton.Enabled = false;
                }
            }
            catch (Exception ex)
            {
                new UIAlertView("Error", ex.Message, (IUIAlertViewDelegate)null, "OK", null).Show();
            }
        }

        private async void ApplyUpdatesClicked(object sender, EventArgs e)
        {
            try
            {
                // Create default sync parameters.
                OfflineMapSyncParameters parameters = await _offlineMapSyncTask.CreateDefaultOfflineMapSyncParametersAsync();

                // Set the parameters to download all updates for the mobile map packages.
                parameters.PreplannedScheduledUpdatesOption = PreplannedScheduledUpdatesOption.DownloadAllUpdates;

                // Create a sync job using the parameters.
                OfflineMapSyncJob offlineMapSyncJob = _offlineMapSyncTask.SyncOfflineMap(parameters);

                // Get the results of the job.
                offlineMapSyncJob.Start();
                OfflineMapSyncResult result = await offlineMapSyncJob.GetResultAsync();

                // Check if the job succeeded.
                if (offlineMapSyncJob.Status == JobStatus.Succeeded)
                {
                    // Check if the map package needs to be re-opened.
                    if (result.IsMobileMapPackageReopenRequired)
                    {
                        // Re-open the mobile map package.
                        _mobileMapPackage.Close();
                        _mobileMapPackage = new MobileMapPackage(_mapPackagePath);
                        await _mobileMapPackage.LoadAsync();

                        // Check that the mobile map package was loaded.
                        if (_mobileMapPackage.LoadStatus == Esri.ArcGISRuntime.LoadStatus.Loaded && _mobileMapPackage.Maps.Any())
                        {
                            // Set the mapview to the map from the package.
                            Map offlineMap = _mobileMapPackage.Maps[0];
                            _myMapView.Map = offlineMap;

                            // Create an offline map sync task for the map.
                            _offlineMapSyncTask = await OfflineMapSyncTask.CreateAsync(offlineMap);
                        }
                        else
                        {
                            new UIAlertView("Error", "Failed to load the mobile map package.", (IUIAlertViewDelegate)null, "OK", null).Show();
                        }
                    }

                    // Verify that the map is up to date and change the UI to reflect the update availability status.
                    CheckForScheduledUpdates();
                }
                else
                {
                    new UIAlertView("Error", "Error syncing the offline map.", (IUIAlertViewDelegate)null, "OK", null).Show();
                }
            }
            catch (Exception ex)
            {
                new UIAlertView("Error", ex.Message, (IUIAlertViewDelegate)null, "OK", null).Show();
            }
        }

        public override void LoadView()
        {
            // Create the views.
            View = new UIView { BackgroundColor = ApplicationTheme.BackgroundColor };

            _myMapView = new MapView() { TranslatesAutoresizingMaskIntoConstraints = false };

            _statusLabel = new UILabel
            {
                Text = " \n ",
                AdjustsFontSizeToFitWidth = true,
                TextAlignment = UITextAlignment.Left,
                BackgroundColor = ApplicationTheme.BackgroundColor,
                TextColor = ApplicationTheme.ForegroundColor,
                LineBreakMode = UILineBreakMode.WordWrap,
                Lines = 2,
                TranslatesAutoresizingMaskIntoConstraints = false
            };

            _applyButton = new UIBarButtonItem() { Title = "Apply scheduled updates", Enabled = false };
            _toolbar = new UIToolbar() { TranslatesAutoresizingMaskIntoConstraints = false };
            _toolbar.Items = new[]
            {
                new UIBarButtonItem(UIBarButtonSystemItem.FlexibleSpace),
                _applyButton,
                new UIBarButtonItem(UIBarButtonSystemItem.FlexibleSpace),
            };

            // Add the views.
            View.AddSubviews(_myMapView, _toolbar, _statusLabel);

            // Lay out the views.
            NSLayoutConstraint.ActivateConstraints(new[]
            {
                _myMapView.TopAnchor.ConstraintEqualTo(View.SafeAreaLayoutGuide.TopAnchor),
                _myMapView.LeadingAnchor.ConstraintEqualTo(View.LeadingAnchor),
                _myMapView.TrailingAnchor.ConstraintEqualTo(View.TrailingAnchor),
                _myMapView.BottomAnchor.ConstraintEqualTo(_toolbar.TopAnchor),

                _toolbar.BottomAnchor.ConstraintEqualTo(View.SafeAreaLayoutGuide.BottomAnchor),
                _toolbar.LeadingAnchor.ConstraintEqualTo(View.LeadingAnchor),
                _toolbar.TrailingAnchor.ConstraintEqualTo(View.TrailingAnchor),

                _statusLabel.TopAnchor.ConstraintEqualTo(View.SafeAreaLayoutGuide.TopAnchor),
                _statusLabel.LeadingAnchor.ConstraintEqualTo(View.LeadingAnchor),
                _statusLabel.TrailingAnchor.ConstraintEqualTo(View.TrailingAnchor),
            });
        }

        public override void ViewDidLoad()
        {
            base.ViewDidLoad();
            Initialize();
        }

        public override void ViewWillAppear(bool animated)
        {
            base.ViewWillAppear(animated);

            // Subscribe to events.
            _applyButton.Clicked += ApplyUpdatesClicked;
        }

        public override void ViewDidDisappear(bool animated)
        {
            base.ViewDidDisappear(animated);

            // Unsubscribe from events, per best practice.
            _applyButton.Clicked -= ApplyUpdatesClicked;

            // Check if sample is being closed.
            if (NavigationController?.ViewControllers == null)
            {
                // Close the mobile map package when the sample closes.
                _mobileMapPackage?.Close();
            }
        }
    }
}