client: Add sync support

When deleting items, this needs to be explicitly activated. For now,
everything will allways be synced as soon as one update with sync set to
true is made. In the future, this will be done in the background.

client/lib/src/database.dart

@@ -45,6 +45,50 @@ class MusicusClientDatabase extends _$MusicusClientDatabase {
     this.client,
   }) : super.connect(connection);
 
+  /// Upload all changes to the server.
+  ///
+  /// If [update] is true, this will also update existing items with new data
+  /// from the server.
+  Future<void> sync([bool update = false]) async {
+    if (update) {
+      for (final person in await oldSyncPersons().get()) {
+        await updatePerson(await client.getPerson(person.id));
+      }
+      for (final instrument in await oldSyncInstruments().get()) {
+        await updateInstrument(await client.getInstrument(instrument.id));
+      }
+      for (final work in await oldSyncWorks().get()) {
+        final workInfo = await client.getWork(work.id);
+        await updateWork(workInfo);
+      }
+      for (final ensemble in await oldSyncEnsembles().get()) {
+        await updateEnsemble(await client.getEnsemble(ensemble.id));
+      }
+      for (final recording in await oldSyncRecordings().get()) {
+        final recordingInfo = await client.getRecording(recording.id);
+        await updateRecording(recordingInfo);
+      }
+    }
+
+    for (final person in await newSyncPersons().get()) {
+      await client.putPerson(person);
+    }
+    for (final instrument in await newSyncInstruments().get()) {
+      await client.putInstrument(instrument);
+    }
+    for (final work in await newSyncWorks().get()) {
+      final workInfo = await getWorkInfo(work);
+      await client.putWork(workInfo);
+    }
+    for (final ensemble in await newSyncEnsembles().get()) {
+      await client.putEnsemble(ensemble);
+    }
+    for (final recording in await newSyncRecordings().get()) {
+      final recordingInfo = await getRecordingInfo(recording);
+      await client.putRecording(recordingInfo);
+    }
+  }
+
   /// Get all available persons.
   ///
   /// This will return a list of [pageSize] persons. You can get another page
@@ -69,10 +113,14 @@ class MusicusClientDatabase extends _$MusicusClientDatabase {
       person,
       mode: InsertMode.insertOrReplace,
     );
+
+    if (person.sync) {
+      await sync();
+    }
   }
 
   /// Delete the person by [id].
-  /// 
+  ///
   /// If [sync] is true, the person will be deleted from the server too. If
   /// that fails, a MusicusNotAuthorizedException or MusicusNotLoggedInException
   /// willl be thrown and the person will NOT be deleted.
@@ -108,10 +156,14 @@ class MusicusClientDatabase extends _$MusicusClientDatabase {
       instrument,
       mode: InsertMode.insertOrReplace,
     );
+
+    if (instrument.sync) {
+      await sync();
+    }
   }
 
   /// Delete the instrument by [id].
-  /// 
+  ///
   /// If [sync] is true, the instrument will be deleted from the server too. If
   /// that fails, a MusicusNotAuthorizedException or MusicusNotLoggedInException
   /// willl be thrown and the instrument will NOT be deleted.
@@ -235,10 +287,14 @@ class MusicusClientDatabase extends _$MusicusClientDatabase {
         await into(workSections).insert(section);
       }
     });
+
+    if (workInfo.work.sync) {
+      await sync();
+    }
   }
 
   /// Delete the work by [id].
-  /// 
+  ///
   /// If [sync] is true, the work will be deleted from the server too. If
   /// that fails, a MusicusNotAuthorizedException or MusicusNotLoggedInException
   /// willl be thrown and the work will NOT be deleted.
@@ -276,10 +332,14 @@ class MusicusClientDatabase extends _$MusicusClientDatabase {
       ensemble,
       mode: InsertMode.insertOrReplace,
     );
+
+    if (ensemble.sync) {
+      await sync();
+    }
   }
 
   /// Delete the ensemble by [id].
-  /// 
+  ///
   /// If [sync] is true, the ensemble will be deleted from the server too. If
   /// that fails, a MusicusNotAuthorizedException or MusicusNotLoggedInException
   /// willl be thrown and the ensemble will NOT be deleted.
@@ -325,6 +385,10 @@ class MusicusClientDatabase extends _$MusicusClientDatabase {
         ));
       }
     });
+
+    if (recordingInfo.recording.sync) {
+      await sync();
+    }
   }
 
   /// Retreive more information on an already queried recording.
@@ -359,7 +423,7 @@ class MusicusClientDatabase extends _$MusicusClientDatabase {
   }
 
   /// Delete a recording by [id].
-  /// 
+  ///
   /// If [sync] is true, the recording will be deleted from the server too. If
   /// that fails, a MusicusNotAuthorizedException or MusicusNotLoggedInException
   /// willl be thrown and the recording will NOT be deleted.