org.openmrs.module.web.taglib.ExtensionPopupMenuTag.java Source code

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Here is the source code for org.openmrs.module.web.taglib.ExtensionPopupMenuTag.java

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/**
 * This Source Code Form is subject to the terms of the Mozilla Public License,
 * v. 2.0. If a copy of the MPL was not distributed with this file, You can
 * obtain one at http://mozilla.org/MPL/2.0/. OpenMRS is also distributed under
 * the terms of the Healthcare Disclaimer located at http://openmrs.org/license.
 *
 * Copyright (C) OpenMRS Inc. OpenMRS is a registered trademark and the OpenMRS
 * graphic logo is a trademark of OpenMRS Inc.
 */
package org.openmrs.module.web.taglib;

import java.io.IOException;
import java.util.HashMap;
import java.util.List;
import java.util.Random;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.tagext.TagSupport;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.openmrs.module.Extension;
import org.openmrs.module.ModuleFactory;
import org.openmrs.module.web.extension.LinkProviderExtension;
import org.openmrs.module.web.extension.provider.Link;
import org.openmrs.util.OpenmrsUtil;
import org.springframework.web.servlet.support.RequestContext;

/**
 *
 */
public class ExtensionPopupMenuTag extends TagSupport {

    private static final long serialVersionUID = 1L;

    private final Log log = LogFactory.getLog(getClass());

    private String label;

    private String pointId;

    private String popupDivId;

    private String position;

    private String parameters;

    private Boolean showLabelIfNoExtensions;

    public ExtensionPopupMenuTag() {
    }

    private String randomString() {
        Random gen = new Random();
        return "" + (1000000 * gen.nextInt());
    }

    public int doStartTag() throws JspException {
        if (showLabelIfNoExtensions == null) {
            showLabelIfNoExtensions = true;
        }
        // using this as we'd use MessageSourceAccessor
        RequestContext context = new RequestContext((HttpServletRequest) this.pageContext.getRequest());

        boolean below = !"above".equals(position);
        Map<String, String> parameters = new HashMap<String, String>();
        if (this.parameters != null) {
            parameters.putAll(OpenmrsUtil.parseParameterList(this.parameters));
        }

        StringBuilder sb = new StringBuilder();
        sb.append("<span style=\"position: relative\">");
        if (below) {
            sb.append("<div id=\"" + popupDivId
                    + "\" style=\"width: 35em; border: 1px solid black; background-color: #f0f0a0; position: absolute; top: 0px; padding-right: 1.2em; z-index: 1; display: none\">");
        } else {
            sb.append("<div id=\"" + popupDivId
                    + "\" style=\"width: 35em; border: 1px solid black; background-color: #f0f0a0; position: absolute; bottom: 0px; padding-right: 1.2em; z-index: 1; display: none\">");
        }

        sb.append("<div style=\"float: right\"><a href=\"javascript:hideLayer('" + popupDivId + "');\" >["
                + context.getMessage("general.close") + "]</a></div>");
        sb.append("<ul>");
        boolean anyExtensionsFound = false;
        List<Extension> extensions = ModuleFactory.getExtensions(pointId, Extension.MEDIA_TYPE.html);
        for (Extension e : extensions) {
            if (e instanceof LinkProviderExtension) {
                anyExtensionsFound = true;
                LinkProviderExtension extension = (LinkProviderExtension) e;
                List<Link> links = extension.getLinks();
                log.debug("extension of class " + e.getClass() + " provides " + links.size() + " links");
                for (Link link : links) {
                    String url = link.getUrl();
                    log.debug("url = " + url);
                    StringBuilder hiddenVars = new StringBuilder();
                    Map<String, String> javascriptSubstitutions = new HashMap<String, String>();
                    for (Map.Entry<String, String> entry : link.getQueryParameters().entrySet()) {
                        hiddenVars.append("<input type=\"hidden\" name=\"" + entry.getKey() + "\" value=\""
                                + entry.getValue() + "\"/>\n");
                    }
                    for (Map.Entry<String, String> entry : parameters.entrySet()) {
                        hiddenVars.append("<input type=\"hidden\" name=\"" + entry.getKey() + "\" ");
                        if (entry.getValue().startsWith("javascript:")) {
                            String function = entry.getValue();
                            function = function.substring(function.indexOf(":") + 1);
                            String random = randomString();
                            javascriptSubstitutions.put(random, function);
                            hiddenVars.append("id=\"" + random + "\" value=\"\"");
                        } else {
                            hiddenVars.append("value=\"" + entry.getValue() + "\"");
                        }
                        hiddenVars.append("/>\n");
                    }
                    String formId = randomString();

                    StringBuilder onClick = new StringBuilder();
                    if (javascriptSubstitutions.size() > 0) {
                        onClick.append(" var _popup_tmp = ''; ");
                    }
                    for (Map.Entry<String, String> entry : javascriptSubstitutions.entrySet()) {
                        String id = entry.getKey();
                        String function = entry.getValue();
                        onClick.append(" _popup_tmp = " + function
                                + "; if (_popup_tmp == null) return; document.getElementById('" + id
                                + "').value = _popup_tmp; ");
                    }
                    onClick.append("document.getElementById('" + formId + "').submit();");

                    sb.append("<li>");
                    sb.append("<form id=\"" + formId + "\" method=\"post\" action=\"" + url + "\">\n");
                    sb.append(hiddenVars);
                    sb.append("\n<a href=\"#\" onClick=\"javascript:" + onClick + "\">"
                            + context.getMessage(link.getLabel(), link.getLabel()) + "</a>");
                    if (link.getDescription() != null) {
                        sb.append("<br/><small>" + context.getMessage(link.getDescription(), link.getDescription())
                                + "</small>");
                    }
                    sb.append("</form>");
                    sb.append("</li>");
                }
            }
        }
        if (!anyExtensionsFound) {
            sb.append("<li>" + context.getMessage("general.none") + "</li>");
        }

        sb.append("</ul>");
        sb.append("</div>");
        sb.append("</span>");
        sb.append("<a href=\"#\" onClick=\"toggleLayer('" + popupDivId + "')\" style=\"border: 1px black solid\">"
                + context.getMessage(label, label) + "</a>");

        try {
            if (anyExtensionsFound || showLabelIfNoExtensions) {
                pageContext.getOut().print(sb);
            }
        } catch (IOException ex) {
            throw new JspException(ex);
        }

        resetValues();
        return SKIP_BODY;
    }

    private void resetValues() {
        pointId = null;
        popupDivId = null;
        label = null;
        position = null;
        parameters = null;
        showLabelIfNoExtensions = null;
    }

    public String getPointId() {
        return pointId;
    }

    public void setPointId(String pointId) {
        this.pointId = pointId;
    }

    public String getPopupDivId() {
        return popupDivId;
    }

    public void setPopupDivId(String divId) {
        this.popupDivId = divId;
    }

    public String getLabel() {
        return label;
    }

    public void setLabel(String label) {
        this.label = label;
    }

    public String getPosition() {
        return position;
    }

    public void setPosition(String position) {
        this.position = position;
    }

    public String getParameters() {
        return parameters;
    }

    public void setParameters(String parameters) {
        this.parameters = parameters;
    }

    public Boolean getShowLabelIfNoExtensions() {
        return showLabelIfNoExtensions;
    }

    public void setShowLabelIfNoExtensions(Boolean showLabelIfNoExtensions) {
        this.showLabelIfNoExtensions = showLabelIfNoExtensions;
    }

}