Index: applications/editors/josm/plugins/mapillary/src/org/openstreetmap/josm/plugins/mapillary/actions/MapillarySubmitCurrentChangesetAction.java
===================================================================
--- applications/editors/josm/plugins/mapillary/src/org/openstreetmap/josm/plugins/mapillary/actions/MapillarySubmitCurrentChangesetAction.java	(revision 32576)
+++ applications/editors/josm/plugins/mapillary/src/org/openstreetmap/josm/plugins/mapillary/actions/MapillarySubmitCurrentChangesetAction.java	(revision 32576)
@@ -0,0 +1,116 @@
+// License: GPL. For details, see LICENSE file.
+package org.openstreetmap.josm.plugins.mapillary.actions;
+
+import static org.openstreetmap.josm.tools.I18n.tr;
+
+import java.awt.event.ActionEvent;
+import java.awt.event.KeyEvent;
+import java.io.IOException;
+
+import javax.json.Json;
+import javax.json.JsonArrayBuilder;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.apache.http.client.methods.CloseableHttpResponse;
+import org.apache.http.client.methods.HttpPost;
+import org.apache.http.entity.StringEntity;
+import org.apache.http.impl.client.CloseableHttpClient;
+import org.apache.http.impl.client.HttpClientBuilder;
+import org.openstreetmap.josm.Main;
+import org.openstreetmap.josm.actions.JosmAction;
+import org.openstreetmap.josm.plugins.mapillary.MapillaryImage;
+import org.openstreetmap.josm.plugins.mapillary.MapillaryLayer;
+import org.openstreetmap.josm.plugins.mapillary.MapillaryLocationChangeset;
+import org.openstreetmap.josm.plugins.mapillary.MapillaryPlugin;
+import org.openstreetmap.josm.plugins.mapillary.utils.MapillaryURL;
+import org.openstreetmap.josm.plugins.mapillary.utils.MapillaryUtils;
+import org.openstreetmap.josm.plugins.mapillary.utils.PluginState;
+import org.openstreetmap.josm.tools.Shortcut;
+
+/**
+ * Imports a set of picture files into JOSM. They must be in jpg or png format.
+ */
+public class MapillarySubmitCurrentChangesetAction extends JosmAction {
+
+  private static final long serialVersionUID = 4995924098228082806L;
+  private static final Log logger = LogFactory.getLog(MapillarySubmitCurrentChangesetAction.class);
+
+  /**
+   * Main constructor.
+   */
+  public MapillarySubmitCurrentChangesetAction() {
+    super(
+      tr("Submit changeset"),
+      MapillaryPlugin.getProvider("icon24.png"),
+      tr("Submit the current changeset"),
+      Shortcut.registerShortcut(
+        "Submit changeset to Mapillary", tr("Submit the current changeset to Mapillary"),
+        KeyEvent.CHAR_UNDEFINED, Shortcut.NONE
+      ),
+      false,
+      "mapillarySubmitChangeset",
+      false
+    );
+    this.setEnabled(false);
+  }
+
+  @Override
+  public void actionPerformed(ActionEvent event) {
+    String token = Main.pref.get("mapillary.access-token");
+    if (token == null || token.trim().isEmpty()) {
+      PluginState.notLoggedInToMapillaryDialog();
+      return;
+    }
+    PluginState.setSubmittingChangeset(true);
+    MapillaryUtils.updateHelpText();
+    HttpClientBuilder builder = HttpClientBuilder.create();
+    HttpPost httpPost = new HttpPost(MapillaryURL.submitChangesetURL().toString());
+    httpPost.addHeader("content-type", "application/json");
+    httpPost.addHeader("Authorization", "Bearer " + token);
+    JsonArrayBuilder changes = Json.createArrayBuilder();
+    MapillaryLocationChangeset locationChangeset = MapillaryLayer.getInstance().getLocationChangeset();
+    for (MapillaryImage image : locationChangeset) {
+      changes.add(Json.createObjectBuilder()
+        .add("image_key", image.getKey())
+        .add("values", Json.createObjectBuilder()
+          .add("from", Json.createObjectBuilder()
+            .add("ca", image.getCa())
+            .add("lat", image.getLatLon().getY())
+            .add("lon", image.getLatLon().getX())
+          )
+          .add("to", Json.createObjectBuilder()
+            .add("ca", image.getTempCa())
+            .add("lat", image.getTempLatLon().getY())
+            .add("lon", image.getTempLatLon().getX())
+          )
+        )
+      );
+    }
+    String json = Json.createObjectBuilder()
+      .add("change_type", "location")
+      .add("changes", changes)
+      .add("request_comment", "JOSM-created")
+      .build().toString();
+    try (CloseableHttpClient httpClient = builder.build()) {
+      httpPost.setEntity(new StringEntity(json));
+      CloseableHttpResponse response = httpClient.execute(httpPost);
+      if (response.getStatusLine().getStatusCode() == 200) {
+        String key = Json.createReader(response.getEntity().getContent()).readObject().getString("key");
+        synchronized (MapillaryUtils.class) {
+          Main.map.statusLine.setHelpText(String.format("%s images submitted, Changeset key: %s", locationChangeset.size(), key));
+        }
+        locationChangeset.cleanChangeset();
+
+      }
+
+    } catch (IOException e) {
+      logger.error("got exception", e);
+      synchronized (MapillaryUtils.class) {
+        Main.map.statusLine.setHelpText("Error submitting Mapillary changeset: " + e.getMessage());
+      }
+    } finally {
+      PluginState.setSubmittingChangeset(false);
+    }
+  }
+}