org.wicketstuff.gmap.api.GClientGeocoder Maven / Gradle / Ivy

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package org.wicketstuff.gmap.api;

import java.time.Duration;

import org.apache.wicket.Component;
import org.apache.wicket.ajax.AjaxEventBehavior;
import org.apache.wicket.ajax.AjaxRequestTarget;
import org.apache.wicket.markup.head.IHeaderResponse;
import org.apache.wicket.markup.html.form.TextField;
import org.apache.wicket.request.IRequestParameters;
import org.apache.wicket.request.Request;
import org.apache.wicket.request.cycle.RequestCycle;
import org.wicketstuff.gmap.GMapHeaderContributor;
import org.wicketstuff.gmap.geocoder.GeocoderStatus;

/**
 */
public abstract class GClientGeocoder extends AjaxEventBehavior
{
    private static final long serialVersionUID = 1L;

    // the markup id of the TextField providing the requested address.
    private final String addressFieldMarkupId;

    private final GMapHeaderContributor headerContrib;

    /**
     * The time to wait before making a new request to self
     */
    private final Duration timeout;

    /**
     * Construct.
     *
     * @param event
     */
    public GClientGeocoder(String event, TextField addressField, final String scheme, final String apiKey)
    {
        this(event, addressField, Duration.ofMillis(500), scheme, apiKey);
    }

    public GClientGeocoder(String event, TextField addressField, Duration timeout, final String scheme, final String apiKey)
    {
        super(event);

        addressField.setOutputMarkupId(true);
        this.addressFieldMarkupId = addressField.getMarkupId();

        this.headerContrib = new GMapHeaderContributor(scheme, apiKey);
        this.timeout = timeout;
    }

    @Override
    public void renderHead(Component c, IHeaderResponse response)
    {
        super.renderHead(c, response);
        headerContrib.renderHead(c, response);
    }

    @Override
    protected void onEvent(AjaxRequestTarget target)
    {
        Request request = RequestCycle.get().getRequest();
        IRequestParameters requestParameters = request.getRequestParameters();
	    String status = requestParameters.getParameterValue("status").toString();
	    GeocoderStatus geocoderStatus = status != null ? GeocoderStatus.valueOf(status) : null;

        String address = null;
        GLatLng coordinates = null;
        if (geocoderStatus == null)
        {
            StringBuilder js = new StringBuilder();
            js.append("setTimeout(function() {")
            .append(getCallbackScript())
            .append("}, ")
            .append(timeout.toMillis())
            .append(");");
             target.appendJavaScript(js);
        }
        else
        {
            if (GeocoderStatus.OK.equals(geocoderStatus))
            {
                address = requestParameters.getParameterValue("address").toString();
                coordinates = GLatLng.parse(requestParameters.getParameterValue("coordinates").toString());
            }
            onGeoCode(target, geocoderStatus, address, coordinates);
        }
    }

	/**
	 * @param target
	 * @param status  The status of the client side operation.
	 * @param address The address if the status is {@code GeocoderStatus#OK}, otherwise- {@code null}
	 * @param latLng  The coordinates if the status is {@code GeocoderStatus#OK}, otherwise- {@code null}
	 */
    public abstract void onGeoCode(AjaxRequestTarget target, GeocoderStatus status, String address, GLatLng latLng);

    @Override
    public CharSequence getCallbackScript()
    {
        return "Wicket.geocoder.getLatLng('" + getCallbackUrl() + "', '" + addressFieldMarkupId + "');";
    }
}