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Piwik and Google Analytics Tracking for Tabris Apps.
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/*******************************************************************************
 * Copyright (c) 2014 EclipseSource and others. All rights reserved. This
 * program and the accompanying materials are made available under the terms of
 * the Eclipse Public License v1.0 which accompanies this distribution, and is
 * available at http://www.eclipse.org/legal/epl-v10.html Contributors:
 * EclipseSource - initial API and implementation
 ******************************************************************************/
package com.eclipsesource.tabris.tracking.internal.piwik;

import static com.eclipsesource.tabris.internal.Clauses.when;
import static com.eclipsesource.tabris.internal.Clauses.whenNull;

import java.util.Map;

import com.eclipsesource.tabris.tracking.internal.analytics.request.HttpRequest;
import com.eclipsesource.tabris.tracking.internal.piwik.model.AdvancedConfiguration;
import com.eclipsesource.tabris.tracking.internal.piwik.model.PiwikConfiguration;
import com.eclipsesource.tabris.tracking.internal.piwik.model.VisitorInformation;
import com.eclipsesource.tabris.tracking.internal.piwik.model.action.Action;
import com.eclipsesource.tabris.tracking.internal.piwik.request.PiwikRequest;


@SuppressWarnings("restriction")
public class Piwik {

  private final String piwikUrl;
  private final PiwikConfiguration configuration;

  public Piwik( String piwikUrl, PiwikConfiguration configuration ) {
    whenNull( piwikUrl ).throwIllegalArgument( "PiwikUrl must not be null." );
    when( piwikUrl.isEmpty() ).throwIllegalArgument( "PiwikUrl must not be empty." );
    whenNull( configuration ).throwIllegalArgument( "Configuration must not be null." );
    this.configuration = configuration;
    this.piwikUrl = piwikUrl;
  }

  public void track( Action action,
                     VisitorInformation visitorInformation,
                     AdvancedConfiguration advancedConfiguration )
  {
    PiwikRequest request = new PiwikRequest( configuration, action, visitorInformation, advancedConfiguration );
    Map parameter = request.assemble();
    verifyResponse( HttpRequest.get( piwikUrl, parameter, true ) );
  }

  private void verifyResponse( HttpRequest httpRequest ) {
    if( httpRequest.code() != 200 ) {
      throw new IllegalStateException( "Piwik GET request failed, HTTP status code: "
                                       + httpRequest.code()
                                       + "\n"
                                       + httpRequest.message() );
    }
  }
}