org.jbpm.workbench.forms.client.display.util.JSNIHelper.java Source code

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Here is the source code for org.jbpm.workbench.forms.client.display.util.JSNIHelper.java

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/*
 * Copyright 2017 Red Hat, Inc. and/or its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.jbpm.workbench.forms.client.display.util;

import com.google.gwt.core.client.JavaScriptObject;
import com.google.gwt.core.client.ScriptInjector;
import com.google.gwt.json.client.JSONObject;
import com.google.gwt.json.client.JSONString;
import com.google.gwt.json.client.JSONValue;

import javax.enterprise.context.Dependent;
import java.util.HashMap;
import java.util.Map;

@Dependent
public class JSNIHelper {

    public static final String FORM_VALIDATOR_FUNCTION = "taskFormValidator()";

    public native void publishGetFormValues() /*-{
                                              $wnd.getFormValues = function (form) {
                                              var result = new Object()
                                              for (i = 0; i < form.elements.length; i++) {
                                              var fieldName = form.elements[i].name;
                                              var fieldValue = form.elements[i].value;
                                              if (fieldName != '') {
                                              result[fieldName] = fieldValue;
                                              }
                                              }
                                              return result;
                                              };
                                              }-*/;

    public Map<String, Object> getParameters(JavaScriptObject values) {
        JSONObject jsonObject = new JSONObject(values);
        Map<String, Object> params = new HashMap<String, Object>();
        for (String key : jsonObject.keySet()) {
            if (!key.startsWith("btn_")) {
                params.put(key, jsonObject.get(key).isString().stringValue());
            }
        }
        return params;
    }

    public Map<String, String> parseParams(JSONObject jsonParams) {
        Map<String, String> params = new HashMap<String, String>();

        for (String key : jsonParams.keySet()) {
            JSONValue value = jsonParams.get(key);
            if (value != null) {
                if (value.isString() != null) {
                    params.put(key, value.isString().stringValue());
                } else {
                    params.put(key, value.toString());
                }
            }
        }

        return params;
    }

    public void notifyErrorMessage(String opener, String message) {
        if (opener != null) {
            notifyOpener("error", message);
        }
    }

    public void notifySuccessMessage(String opener, String message) {
        if (opener != null) {
            notifyOpener("success", message);
        }
    }

    protected void notifyOpener(String status, String message) {
        JSONObject jsonMessage = new JSONObject();
        jsonMessage.put("status", new JSONString(status));
        jsonMessage.put("message", new JSONString(message));
        notifyOpener(jsonMessage.toString());
    }

    protected native void notifyOpener(String message) /*-{
                                                       $wnd.top.postMessage(message, $wnd.location.href);
                                                       }-*/;

    public void injectFormValidationsScripts(String html) {
        String formScripts = "";

        while (startOfScript(html) != -1) {
            int begin = startOfScript(html);
            int end = endOfScript(html);

            String fullScript = html.substring(begin, end);
            String script = fullScript.substring(fullScript.indexOf(">") + 1, fullScript.lastIndexOf("</"));

            formScripts += script;
            html = html.replace(fullScript, "");
        }

        if (formScripts == null || formScripts.length() == 0) {
            formScripts = "function taskFormValidator() {return true;}";
        }

        ScriptInjector.fromString(formScripts).setWindow(ScriptInjector.TOP_WINDOW).inject();
    }

    protected int startOfScript(String html) {
        return html.toLowerCase().indexOf("<script");
    }

    protected int endOfScript(String html) {
        int start = html.toLowerCase().indexOf("</script");

        int end = html.substring(start).indexOf(">") + 1;

        return start + end;
    }
}