[Share Locations] Share a beautified JSON with timestamp + coordinates data

Space_Mapper/lib/models/list_view.dart

@@ -1,4 +1,6 @@
 import 'package:collection/collection.dart';
+import 'package:flutter_background_geolocation/flutter_background_geolocation.dart'
+    as bg;
 
 class CustomLocationsManager {
   static List<CustomLocation> customLocations = [];
@@ -16,24 +18,9 @@ class CustomLocationsManager {
         .firstWhereOrNull((element) => element.getUUID() == uuid);
     return ret;
   }
-}
-
-class CustomLocation {
-  late final String _uuid;
-  late String _locality = "";
-  late String _subAdministrativeArea = "";
-  late String _street = "";
-  // ignore: non_constant_identifier_names
-  late String _ISOCountry = ""; // 2 letter code
-  late String _timestamp = ""; // ex: 2021-10-25T21:25:08.210Z
-  late String _activity = "";
-  late num _speed = -1; //in meters / second
-  late num _speedAccuracy = -1; //in meters / second
-  late num _altitude = -1; //in meters
-  late num _altitudeAccuracy = -1; // in meters
 
   /// Makes timestamp readable by a human
-  String formatTimestamp(String timestamp) {
+  static String formatTimestamp(String timestamp) {
     //2021-10-25T21:25:08.210Z <- This is the original format
     //2021-10-25 | 21:25:08    <- This is the result
     String result = "";
@@ -46,6 +33,22 @@ class CustomLocation {
     }
     return result;
   }
+}
+
+class CustomLocation {
+  late final String _uuid;
+  late String _locality = "";
+  late String _subAdministrativeArea = "";
+  late String _street = "";
+  // ignore: non_constant_identifier_names
+  late String _ISOCountry = ""; // 2 letter code
+  late String _timestamp = "";
+  late String _activity = "";
+  late num _speed = -1; //in meters / second
+  late num _speedAccuracy = -1; //in meters / second
+  late num _altitude = -1; //in meters
+  late num _altitudeAccuracy = -1; // in meters
+  late bool _toDelete = false;
 
   /// Checks if data is valid and then displays 3 lines with: Activity, Speed and Altitude
   String displayCustomText(num maxSpeedAccuracy, num maxAltitudeAccuracy) {
@@ -64,6 +67,16 @@ class CustomLocation {
     return ret;
   }
 
+  Future<void> deleteThisLocation() async {
+    if (_toDelete == false) {
+      /// We need this checker to ensure that the user doesn't send the delete request twice, causing an exception
+      _toDelete = true;
+      await bg.BackgroundGeolocation.destroyLocation(this.getUUID());
+      CustomLocationsManager.customLocations
+          .removeWhere((element) => element.getUUID() == this.getUUID());
+    }
+  }
+
   // Variable setters
   void setUUID(String uuid) {
     _uuid = uuid;
@@ -86,7 +99,7 @@ class CustomLocation {
   }
 
   void setTimestamp(String timestamp) {
-    _timestamp = formatTimestamp(timestamp);
+    _timestamp = CustomLocationsManager.formatTimestamp(timestamp);
   }
 
   void setActivity(String activity) {

Space_Mapper/lib/ui/home_view.dart

@@ -365,13 +365,11 @@ class HomeViewState extends State<HomeView>
           },
         ),
         actions: <Widget>[
-          /*
           IconButton(
             icon: Icon(Icons.gps_fixed),
             color: Colors.yellow,
-            onPressed:
-              _onClickGetCurrentPosition,
-          ),*/
+            onPressed: _onClickGetCurrentPosition,
+          ),
           Switch(
             value: _enabled,
             onChanged: _onClickEnable,

Space_Mapper/lib/ui/list_view.dart

@@ -105,114 +105,69 @@ class _STOListViewState extends State<STOListView> {
           itemCount: customLocations.length,
           itemBuilder: (context, index) {
             CustomLocation thisLocation = customLocations[index];
-            return _tile(
-                thisLocation.getLocality() +
-                    ", " +
-                    thisLocation.getSubAdministrativeArea() +
-                    ", " +
-                    thisLocation.getISOCountryCode(),
-                thisLocation.getTimestamp() + "\n" + thisLocation.getStreet(),
-                thisLocation.displayCustomText(10.0, 10.0),
-                Icons.gps_fixed);
-          },
-        ));
-  }
-
-  ListTile _tile(String title, String subtitle, String text, IconData icon) =>
-      ListTile(
-        title: Text(title,
-            style: TextStyle(
-              fontWeight: FontWeight.w500,
-              fontSize: 20,
-            )),
-        subtitle: new RichText(
-          text: new TextSpan(
-            // Note: Styles for TextSpans must be explicitly defined.
-            // Child text spans will inherit styles from parent
-            style: new TextStyle(
-              fontSize: 14.0,
-              color: Colors.black,
-            ),
-            children: <TextSpan>[
-              new TextSpan(
-                  text: subtitle,
-                  style: new TextStyle(fontWeight: FontWeight.bold)),
-              new TextSpan(text: text),
-            ],
-          ),
-        ),
-        leading: Icon(
-          icon,
-          color: Colors.blue[500],
-        ),
-      );
-}
-
-/*class STOListView extends StatelessWidget {
-  @override
-  Widget build(BuildContext context) {
-    return Scaffold(
-        appBar: AppBar(title: Text("Locations History")),
-        body: FutureBuilder<List>(
-          future: buildLocationsList(),
-          builder: (context, snapshot) {
-            if (snapshot.hasData) {
-              List? data = snapshot.data;
-              return _jobsListView(data);
-            } else if (snapshot.hasError) {
-              return Text("${snapshot.error}");
-            }
-            return Center(
-              child: CircularProgressIndicator(),
+            return Dismissible(
+              child: _tile(thisLocation),
+              background: Container(
+                child: Container(
+                  margin: EdgeInsets.only(right: 10.0),
+                  alignment: Alignment.centerRight,
+                  child: new LayoutBuilder(builder: (context, constraint) {
+                    return new Icon(Icons.delete_forever,
+                        size: constraint.biggest.height * 0.5);
+                  }),
+                ),
+                color: Colors.red,
+              ),
+              key: ValueKey<CustomLocation>(customLocations[index]),
+              confirmDismiss: (DismissDirection direction) async {
+                await thisLocation.deleteThisLocation();
+                setState(() {
+                  customLocations =
+                      CustomLocationsManager.fetchAll(sortByNewest: true);
+                  thisLocation = customLocations[index];
+                });
+                return true;
+              },
             );
           },
         ));
   }
 
-  ListView _jobsListView(data) {
-    return ListView.builder(
-        itemCount: data.length,
-        itemBuilder: (context, index) {
-          CustomLocation thisLocation = data[index];
-          return _tile(
-              thisLocation.getUUID().toString() +
-                  thisLocation.getLocality() +
-                  ", " +
-                  thisLocation.getSubAdministrativeArea() +
-                  ", " +
-                  thisLocation.getISOCountryCode(),
-              thisLocation.getTimestamp(),
-              thisLocation.displayCustomText(10.0, 10.0),
-              Icons.gps_fixed);
-        });
-  }
-
-  ListTile _tile(String title, String subtitle, String text, IconData icon) =>
-      ListTile(
-        title: Text(title,
-            style: TextStyle(
-              fontWeight: FontWeight.w500,
-              fontSize: 20,
-            )),
-        subtitle: new RichText(
-          text: new TextSpan(
-            // Note: Styles for TextSpans must be explicitly defined.
-            // Child text spans will inherit styles from parent
-            style: new TextStyle(
-              fontSize: 14.0,
-              color: Colors.black,
-            ),
-            children: <TextSpan>[
-              new TextSpan(
-                  text: subtitle,
-                  style: new TextStyle(fontWeight: FontWeight.bold)),
-              new TextSpan(text: text),
-            ],
+  ListTile _tile(CustomLocation thisLocation) {
+    String title = thisLocation.getLocality() +
+        ", " +
+        thisLocation.getSubAdministrativeArea() +
+        ", " +
+        thisLocation.getISOCountryCode();
+    String subtitle =
+        thisLocation.getTimestamp() + "\n" + thisLocation.getStreet();
+    String text = thisLocation.displayCustomText(10.0, 10.0);
+    return ListTile(
+      title: Text(title,
+          style: TextStyle(
+            fontWeight: FontWeight.w500,
+            fontSize: 20,
+          )),
+      subtitle: new RichText(
+        text: new TextSpan(
+          // Note: Styles for TextSpans must be explicitly defined.
+          // Child text spans will inherit styles from parent
+          style: new TextStyle(
+            fontSize: 14.0,
+            color: Colors.black,
           ),
+          children: <TextSpan>[
+            new TextSpan(
+                text: subtitle,
+                style: new TextStyle(fontWeight: FontWeight.bold)),
+            new TextSpan(text: text),
+          ],
         ),
-        leading: Icon(
-          icon,
-          color: Colors.blue[500],
-        ),
-      );
-}*/
+      ),
+      leading: Icon(
+        Icons.gps_fixed,
+        color: Colors.blue[500],
+      ),
+    );
+  }
+}

Space_Mapper/lib/ui/side_drawer.dart

@@ -1,3 +1,5 @@
+import 'dart:convert';
+import 'package:asm/models/list_view.dart';
 import 'package:asm/ui/list_view.dart';
 import 'package:asm/ui/report_an_issue.dart';
 import 'package:asm/ui/web_view.dart';
@@ -7,12 +9,43 @@ import 'package:share/share.dart';
 import 'package:flutter_background_geolocation/flutter_background_geolocation.dart'
     as bg;
 
+class ShareLocation {
+  late final String _timestamp;
+  final double _lat;
+  final double _long;
+
+  ShareLocation(timestamp, this._lat, this._long) {
+    _timestamp = CustomLocationsManager.formatTimestamp(timestamp);
+  }
+
+  Map<String, dynamic> toJson() => {
+        'timestamp': _timestamp,
+        'coords': {
+          'latitude': _lat,
+          'longitude': _long,
+        }
+      };
+}
+
 class SpaceMapperSideDrawer extends StatelessWidget {
   _shareLocations() async {
     var now = new DateTime.now();
     List allLocations = await bg.BackgroundGeolocation.locations;
-    Share.share(allLocations.toString(),
-        subject: "space_mapper_trajectory_" + now.toIso8601String() + ".json");
+    List<ShareLocation> customLocation = [];
+
+    // We get only timestamp and coordinates into our custom class
+    for (var thisLocation in allLocations) {
+      ShareLocation _loc = new ShareLocation(
+          bg.Location(thisLocation).timestamp,
+          bg.Location(thisLocation).coords.latitude,
+          bg.Location(thisLocation).coords.longitude);
+      customLocation.add(_loc);
+    }
+
+    String prettyString = JsonEncoder.withIndent('  ').convert(customLocation);
+    String subject =
+        "space_mapper_trajectory_" + now.toIso8601String() + ".json";
+    Share.share(prettyString, subject: subject);
   }
 
   _launchProjectURL() async {

Space_Mapper/test/unit/list_view_test.dart

@@ -10,7 +10,8 @@ void main() {
           String timestamp = "2021-10-25T21:25:08.210Z";
           CustomLocation dL = new CustomLocation();
           dL.setTimestamp(timestamp);
-          String ret = dL.formatTimestamp(dL.getTimestamp());
+          String ret =
+              CustomLocationsManager.formatTimestamp(dL.getTimestamp());
           expect(ret, "2021-10-25 | 21:25:08");
         });
       });