D-Net

package eu.dnetlib.client.monitor;

import com.github.gwtbootstrap.client.ui.*;

import com.github.gwtbootstrap.client.ui.ListBox;

import com.github.gwtbootstrap.client.ui.base.IconAnchor;

import com.github.gwtbootstrap.client.ui.constants.AlertType;

import com.github.gwtbootstrap.client.ui.constants.AlternateSize;

import com.github.gwtbootstrap.client.ui.constants.IconPosition;

import com.github.gwtbootstrap.client.ui.constants.IconType;

import com.github.gwtbootstrap.client.ui.event.HideEvent;

import com.github.gwtbootstrap.client.ui.event.HideHandler;

import com.github.gwtbootstrap.client.ui.event.ShowEvent;

import com.github.gwtbootstrap.client.ui.event.ShowHandler;

import com.google.gwt.core.client.GWT;

import com.google.gwt.dom.client.*;

import com.google.gwt.event.dom.client.ChangeEvent;

import com.google.gwt.event.dom.client.ChangeHandler;

import com.google.gwt.event.dom.client.ClickEvent;

import com.google.gwt.event.dom.client.ClickHandler;

import com.google.gwt.i18n.client.DateTimeFormat;

import com.google.gwt.query.client.Function;

import com.google.gwt.user.client.Event;

import com.google.gwt.user.client.Timer;

import com.google.gwt.user.client.rpc.AsyncCallback;

import com.google.gwt.user.client.ui.*;

import com.google.gwt.user.client.ui.Label;

import eu.dnetlib.client.*;

import eu.dnetlib.client.fundingrequest.existingrequests.ExistingRequestElement;

import eu.dnetlib.client.widgets.*;

import eu.dnetlib.client.widgets.TextBox;

import eu.dnetlib.goldoa.domain.*;

import java.util.ArrayList;

import java.util.Date;

import java.util.List;

import static com.google.gwt.query.client.GQuery.$;

/**

 * Created by stefania on 3/6/15.

 */

public class MonitorFundingRequestsWidget implements MyWidget {

    private String token = "";

    private FlowPanel monitorFundingRequestsPagePanel = new FlowPanel();

    private HTML monitorFundingRequestsTitleLabel = new HTML();

    private Label monitorFundingRequestsInfoLabel = new Label();

    private Alert errorLabel = new Alert();

    private Alert warningLabel = new Alert();

    private FlowPanel sortAndFilterPanel = new FlowPanel();

    private TextBox search = new TextBox();

    private ListBox orderByTypes = new ListBox();

    private ListBox sortByTypes = new ListBox();

    private DropdownCheckbox dropdownCheckbox;

    private FlowPanel requestsListPanel = new FlowPanel();

    private FlowPanel topPagerPanel = new FlowPanel();

    private Pager resultsPagerTop = new Pager("Previous", "Next");

    private Label pageNumberTop = new Label();

    private FlowPanel bottomPagerPanel = new FlowPanel();

    private Pager resultsPagerBottom = new Pager("Previous", "Next");

    private Label pageNumberBottom = new Label();

    private FlowPanel requestsAndPagerPanel = new FlowPanel();

    private DateTimeFormat dtf = DateTimeFormat.getFormat("yyyy/MM/dd");

    private DataServiceAsync dataService = GWT.create(DataService.class);

    private Timer timer;

    private List<AccordionGroup> requestsList = new ArrayList<>();

    private GoldOAConstants goldOAConstants = GWT.create(GoldOAConstants.class);

    private RequestInfoPage requestInfoPage = null;

    public MonitorFundingRequestsWidget() {

        List<Vocabulary> statusOptions = new ArrayList<>();

        statusOptions.add(new Vocabulary(Request.RequestStatus.SUBMITTED.name(), Request.RequestStatus.SUBMITTED.getValue()));

        statusOptions.add(new Vocabulary(Request.RequestStatus.INCOMPLETE.name(), Request.RequestStatus.INCOMPLETE.getValue()));

        statusOptions.add(new Vocabulary(Request.RequestStatus.CONDITIONALLY_APPROVED.name(), Request.RequestStatus.CONDITIONALLY_APPROVED.getValue()));

        statusOptions.add(new Vocabulary(Request.RequestStatus.APPROVED.name(), Request.RequestStatus.APPROVED.getValue()));

        statusOptions.add(new Vocabulary(Request.RequestStatus.REJECTED.name(), Request.RequestStatus.REJECTED.getValue()));

        statusOptions.add(new Vocabulary(Request.RequestStatus.LIBRARY_FUND_SUBMITTED.name(), Request.RequestStatus.LIBRARY_FUND_SUBMITTED.getValue()));

        statusOptions.add(new Vocabulary(Request.RequestStatus.PUBLISHER_FUND_SUBMITTED.name(), Request.RequestStatus.PUBLISHER_FUND_SUBMITTED.getValue()));

        statusOptions.add(new Vocabulary(Request.RequestStatus.LIBRARY_FUND_PAID.name(), Request.RequestStatus.LIBRARY_FUND_PAID.getValue()));

        statusOptions.add(new Vocabulary(Request.RequestStatus.PUBLISHER_FUND_PAID.name(), Request.RequestStatus.PUBLISHER_FUND_PAID.getValue()));

        statusOptions.add(new Vocabulary(Request.RequestStatus.ACCOUNTING_PROCESSING.name(), Request.RequestStatus.ACCOUNTING_PROCESSING.getValue()));

        statusOptions.add(new Vocabulary(Request.RequestStatus.ACCOUNTING_PAID.name(), Request.RequestStatus.ACCOUNTING_PAID.getValue()));

        statusOptions.add(new Vocabulary(Request.RequestStatus.ACCOUNTING_ON_HOLD.name(), Request.RequestStatus.ACCOUNTING_ON_HOLD.getValue()));

        statusOptions.add(new Vocabulary(Request.RequestStatus.ACCOUNTING_DENIED.name(), Request.RequestStatus.ACCOUNTING_DENIED.getValue()));

        dropdownCheckbox = new DropdownCheckbox(statusOptions);

        monitorFundingRequestsPagePanel.addStyleName("content");

        monitorFundingRequestsTitleLabel.setHTML("Monitor Funding Requests <div class=\"options float-right\">" +

                "<a target=\"_blank\" id=\"downloadCSV\"><i class=\"icon-download-alt\"></i> Export in CSV</a>" +

                "</div>");

        monitorFundingRequestsTitleLabel.addStyleName("contentTitleLabel");

        monitorFundingRequestsInfoLabel.setText("Monitor and change the status of funding requests that are pending approval");

        monitorFundingRequestsInfoLabel.addStyleName("contentInfoLabel");

        errorLabel.addStyleName("alertLabel");

        errorLabel.addStyleName("marginTop30");

        errorLabel.setType(AlertType.ERROR);

        errorLabel.setClose(false);

        errorLabel.setVisible(false);

        warningLabel.addStyleName("alertLabel");

        warningLabel.addStyleName("marginTop30");

        warningLabel.setType(AlertType.WARNING);

        warningLabel.setClose(false);

        warningLabel.setVisible(false);

        addUtilitiesBar();

        requestsListPanel.addStyleName("requestsListPanel");

        topPagerPanel.addStyleName("marginTop40");

        resultsPagerTop.addStyleName("resultsPager");

        resultsPagerTop.setAligned(true);

        resultsPagerTop.setArrows(true);

        resultsPagerTop.getLeft().setIcon(IconType.LONG_ARROW_LEFT);

        resultsPagerTop.getRight().setIcon(IconType.LONG_ARROW_RIGHT);

        resultsPagerTop.getRight().setIconPosition(IconPosition.RIGHT);

        resultsPagerTop.getLeft().addClickHandler(new ClickHandler() {

            @Override

            public void onClick(ClickEvent clickEvent) {

                previousPage();

            }

        });

        resultsPagerTop.getRight().addClickHandler(new ClickHandler() {

            @Override

            public void onClick(ClickEvent clickEvent) {

                nextPage();

            }

        });

        resultsPagerBottom.addStyleName("resultsPager");

        resultsPagerBottom.setAligned(true);

        resultsPagerBottom.setArrows(true);

        resultsPagerBottom.getLeft().setIcon(IconType.LONG_ARROW_LEFT);

        resultsPagerBottom.getRight().setIcon(IconType.LONG_ARROW_RIGHT);

        resultsPagerBottom.getRight().setIconPosition(IconPosition.RIGHT);

        resultsPagerBottom.getLeft().addClickHandler(new ClickHandler() {

            @Override

            public void onClick(ClickEvent clickEvent) {

                previousPage();

            }

        });

        resultsPagerBottom.getRight().addClickHandler(new ClickHandler() {

            @Override

            public void onClick(ClickEvent clickEvent) {

                nextPage();

            }

        });

        requestsAndPagerPanel.add(topPagerPanel);

        requestsAndPagerPanel.add(requestsListPanel);

        requestsAndPagerPanel.add(bottomPagerPanel);

        monitorFundingRequestsPagePanel.add(monitorFundingRequestsTitleLabel);

        monitorFundingRequestsPagePanel.add(monitorFundingRequestsInfoLabel);

        monitorFundingRequestsPagePanel.add(sortAndFilterPanel);

        monitorFundingRequestsPagePanel.add(errorLabel);

        monitorFundingRequestsPagePanel.add(warningLabel);

        monitorFundingRequestsPagePanel.add(requestsAndPagerPanel);

    }

    @Override

    public Widget asWidget() {

        return monitorFundingRequestsPagePanel;

    }

    @Override

    public void clear() {

        errorLabel.setVisible(false);

        warningLabel.setVisible(false);

        requestsListPanel.clear();

        topPagerPanel.clear();

        bottomPagerPanel.clear();

    }

    @Override

    public void reload() {

        MyWidgetHelper.hideSidebar();

        SidebarPanel helpPanel = new SidebarPanel("Help");

        MyWidgetHelper.loadHelp(helpPanel, token.split("\\.")[0]);

        search.setValue("", false);

        orderByTypes.setSelectedValue(RequestSortOrder.DESCENDING.name());

        sortByTypes.setSelectedValue(RequestSort.DATE.name());

        timer = null;

        loadRequests(null, null, RequestSort.DATE, RequestSortOrder.DESCENDING, null, null, null, 0, 9);

    }

    @Override

    public void setToken(String token) {

        this.token = token;

    }

    @Override

    public void afterAdditionToRootPanel() {

        dropdownCheckbox.addFunctionality();

        $("#downloadCSV").click(new Function() {

            public boolean f(Event e) {

                AnchorElement anchorElement = (AnchorElement) Document.get().getElementById("downloadCSV");

                String term = null;

                if(search.getValue()!=null && !search.getValue().trim().equals(""))

                    term = search.getValue().trim();

                List<String> selectedStatuses = dropdownCheckbox.getSelectedStatuses();

                String url = GWT.getModuleBaseURL() + "csv?" + "mode=moderator" + "&requestSort=" + sortByTypes.getSelectedValue() +

                        "&requestOrder=" + orderByTypes.getSelectedValue();

                if(term!=null)

                    url += "&filterTerm=" + term;

                if(!selectedStatuses.isEmpty()) {

                    String statuses = "";

                    for(int i=0; i<selectedStatuses.size(); i++) {

                        if(i!=0)

                            statuses += ",";

                        statuses += selectedStatuses.get(i);

                    }

                    url += "&statusFilters=" + statuses;

                }

                anchorElement.setHref(url);

                return true;

            }

        });

    }

    private void addUtilitiesBar() {

        FlowPanel sortAndFilterBar = new FlowPanel();

        sortAndFilterBar.addStyleName("sortAndFilterBar");

        FlowPanel firstRow = new FlowPanel();

        FlowPanel secondRow = new FlowPanel();

        sortAndFilterBar.add(firstRow);

        sortAndFilterBar.add(secondRow);

        search.addStyleName("searchTextBox");

        search.addStyleName("float-right");

        search.setPlaceholder("Filter...");

        search.setValueChangeHandler(new ValueChangeHandler() {

            @Override

            public void handle(ValueChangeEvent valueChangeEvent) {

                sortAndFilter();

            }

        });

        firstRow.add(search);

        orderByTypes.addItem("Ascending", RequestSortOrder.ASCENDING.name());

        orderByTypes.addItem("Descending", RequestSortOrder.DESCENDING.name());

        orderByTypes.setAlternateSize(AlternateSize.SMALL);

        orderByTypes.addChangeHandler(new ChangeHandler() {

            @Override

            public void onChange(ChangeEvent changeEvent) {

                sortAndFilter();

            }

        });

        Form orderBy = new Form();

        orderBy.addStyleName("inlineBlock");

        orderBy.add(new FormFieldSet("Order by", orderByTypes));

        sortByTypes.addItem("Date", RequestSort.DATE.name());

        sortByTypes.addItem("User", RequestSort.USER.name());

        sortByTypes.addItem("Researcher", RequestSort.RESEARCHER.name());

        sortByTypes.addItem("Project", RequestSort.PROJECT.name());

        sortByTypes.addItem("Publication", RequestSort.PUBLICATION.name());

        sortByTypes.addItem("Journal", RequestSort.JOURNAL.name());

        sortByTypes.addItem("Publisher", RequestSort.PUBLISHER.name());

        sortByTypes.addItem("Status", RequestSort.STATUS.name());

        sortByTypes.addItem("Funded with", RequestSort.FUNDING_REQUESTED.name());

        sortByTypes.setAlternateSize(AlternateSize.SMALL);

        sortByTypes.addChangeHandler(new ChangeHandler() {

            @Override

            public void onChange(ChangeEvent changeEvent) {

                sortAndFilter();

            }

        });

        Form sortBy = new Form();

        sortBy.addStyleName("inlineBlock");

        sortBy.add(new FormFieldSet("Sort by", sortByTypes));

        Form filterByStatusForm = new Form();

        filterByStatusForm.addStyleName("inlineBlock");

        dropdownCheckbox.addStyleName("dropdownCheckbox");

        DropdownCheckbox.OptionSelectedListener optionSelectedListener = new DropdownCheckbox.OptionSelectedListener() {

            @Override

            public void onSelect() {

                sortAndFilter();

            }

        };

        dropdownCheckbox.setOptionSelectedListener(optionSelectedListener);

        filterByStatusForm.add(new FormFieldSet("Status", dropdownCheckbox.asWidget()));

        firstRow.add(sortBy);

        firstRow.add(orderBy);

        firstRow.add(filterByStatusForm);

        FlowPanel expandCollapse = new FlowPanel();

        expandCollapse.addStyleName("float-right");

        IconAnchor expandAll = new IconAnchor();

        expandAll.setText("Expand All");

        expandAll.setIcon(IconType.ANGLE_DOWN);

        expandAll.addClickHandler(new ClickHandler() {

            @Override

            public void onClick(ClickEvent clickEvent) {

                for(AccordionGroup accordion : requestsList)

                    accordion.show();

            }

        });

        expandCollapse.add(expandAll);

        IconAnchor collapseAll = new IconAnchor();

        collapseAll.setText("Collapse All");

        collapseAll.setIcon(IconType.ANGLE_UP);

        collapseAll.addClickHandler(new ClickHandler() {

            @Override

            public void onClick(ClickEvent clickEvent) {

                for(AccordionGroup accordion : requestsList)

                    accordion.hide();

            }

        });

        expandCollapse.add(collapseAll);

        secondRow.add(expandCollapse);

        sortAndFilterPanel.add(sortAndFilterBar);

    }

    private void sortAndFilter() {

        if(timer==null) {

            timer = new Timer() {

                @Override

                public void run() {

                    RequestSort requestSort = RequestSort.valueOf(sortByTypes.getSelectedValue());

                    RequestSortOrder requestSortOrder = RequestSortOrder.valueOf(orderByTypes.getSelectedValue());

                    String term = null;

                    if(!search.getValue().trim().equals(""))

                        term = search.getValue().trim();

                    List<String> selectedStatuses = dropdownCheckbox.getSelectedStatuses();

                    if(selectedStatuses.isEmpty()) {

                        loadRequests(null, null, requestSort, requestSortOrder, null, term, null, 0, 9);

                    } else {

                        Request.RequestStatus[] statuses = new Request.RequestStatus[selectedStatuses.size()];

                        for(int i=0; i<selectedStatuses.size(); i++) {

                            statuses[i] = Request.RequestStatus.valueOf(selectedStatuses.get(i));

                        }

                        loadRequests(null, null, requestSort, requestSortOrder, null, term, statuses, 0, 9);

                    }

                }

            };

            timer.schedule(500);

        } else {

            timer.cancel();

            timer.schedule(500);

        }

    }

    private void loadRequests(Date fromDate, Date toDate, RequestSort requestSortBy, RequestSortOrder order,

                              RequestFilter requestFilter, String term, Request.RequestStatus[] statusFilters, int from, int to) {

        errorLabel.setVisible(false);

        warningLabel.setVisible(false);

        final HTML loadingWheel = new HTML("<div class=\"loader-big\"></div><div class=\"whiteFilm\"></div>");

        requestsAndPagerPanel.addStyleName("loading");

        requestsAndPagerPanel.add(loadingWheel);

        dataService.getRequests(fromDate, toDate, requestSortBy, order, requestFilter, term, statusFilters, from, to,

                new AsyncCallback<RequestInfoPage>() {

                    @Override

                    public void onFailure(Throwable throwable) {

                        MonitorFundingRequestsWidget.this.requestInfoPage = null;

                        requestsAndPagerPanel.remove(loadingWheel);

                        requestsAndPagerPanel.removeStyleName("loading");

                        requestsListPanel.clear();

                        topPagerPanel.clear();

                        bottomPagerPanel.clear();

                        errorLabel.setText(goldOAConstants.errorGettingListOfFundingRequests());

                        errorLabel.setVisible(true);

                    }

                    @Override

                    public void onSuccess(RequestInfoPage requestInfoPage) {

                        MonitorFundingRequestsWidget.this.requestInfoPage = requestInfoPage;

                        requestsAndPagerPanel.remove(loadingWheel);

                        requestsAndPagerPanel.removeStyleName("loading");

                        requestsListPanel.clear();

                        topPagerPanel.clear();

                        bottomPagerPanel.clear();

                        if (requestInfoPage.getRequests().isEmpty()) {

                            warningLabel.setText(goldOAConstants.warningNoFundingRequestsAvailable());

                            warningLabel.setVisible(true);

                        } else {

                            drawTopPager();

                            for(int i=0; i<requestInfoPage.getRequests().size(); i++)

                                drawRequestInfo(requestInfoPage.getRequests().get(i), i);

                            drawBottomPager();

                        }

                    }

                });

    }

    private void drawTopPager() {

        int totalNoOfPages = (int) Math.ceil(requestInfoPage.getTotal() / (requestInfoPage.getTo() - requestInfoPage.getFrom() + 1d));

        final int pageSize = requestInfoPage.getTo() - requestInfoPage.getFrom() + 1;

        int currentPage = (requestInfoPage.getFrom() / pageSize) + 1;

        if(currentPage==1)

            resultsPagerTop.getLeft().setDisabled(true);

        else

            resultsPagerTop.getLeft().setDisabled(false);

        if(currentPage==totalNoOfPages)

            resultsPagerTop.getRight().setDisabled(true);

        else

            resultsPagerTop.getRight().setDisabled(false);

        topPagerPanel.add(resultsPagerTop);

        pageNumberTop.setText("page " + currentPage + " of " + totalNoOfPages);

        pageNumberTop.addStyleName("resultsPageLabel");

        topPagerPanel.add(pageNumberTop);

    }

    private void drawBottomPager() {

        int totalNoOfPages = (int) Math.ceil(requestInfoPage.getTotal() / (requestInfoPage.getTo() - requestInfoPage.getFrom() + 1d));

        final int pageSize = requestInfoPage.getTo() - requestInfoPage.getFrom() + 1;

        int currentPage = (requestInfoPage.getFrom() / pageSize) + 1;

        if(currentPage==1)

            resultsPagerBottom.getLeft().setDisabled(true);

        else

            resultsPagerBottom.getLeft().setDisabled(false);

        if(currentPage==totalNoOfPages)

            resultsPagerBottom.getRight().setDisabled(true);

        else

            resultsPagerBottom.getRight().setDisabled(false);

        bottomPagerPanel.add(resultsPagerBottom);

        pageNumberBottom.setText("page " + currentPage + " of " + totalNoOfPages);

        pageNumberBottom.addStyleName("resultsPageLabel");

        bottomPagerPanel.add(pageNumberBottom);

    }

    private void drawRequestInfo(final RequestInfo requestInfo, int i) {

        final AccordionGroup dataRequestAccordionItem = new AccordionGroup();

//        if(((i+1)%2)==1)

//            dataRequestAccordionItem.addStyleName("odd");

        HTML statusHeading = new HTML();

        if(requestInfo.getPublication()!=null &&

                (requestInfo.getPublication().getRepository()!=null || !requestInfo.getPublication().getRepository().equals("")

                        || requestInfo.getPublication().getDoi()!=null || !requestInfo.getPublication().getDoi().equals(""))) {

            statusHeading.setHTML("<img src=\"./imgs/warning_h20.png\" /><span class=\"status\">" + requestInfo.getStatus().getValue().toUpperCase() + "</span>");

        } else {

            statusHeading.setHTML("<span class=\"status\">" + requestInfo.getStatus().getValue().toUpperCase() + "</span>");

        }

        statusHeading.addStyleName("float-right");

        statusHeading.addStyleName("statusHeading");

        dataRequestAccordionItem.getHeading().add(statusHeading);

        HTML extraInfo = new HTML();

        String extraInfoContents = "<div style=\"width: 8%\" class=\"inlineBlock\"><span>" + dtf.format(requestInfo.getDate()) +

                "</span></div><div style=\"width: 18%\" class=\"inlineBlock\"><span style=\"padding-right:10px; padding-left:10px\" " +

                ">|</span><span>";

        if(requestInfo.getProject()!=null)

            extraInfoContents += requestInfo.getProject().getAcronym();

        else

            extraInfoContents += "---";

        extraInfoContents += "</span></div><div style=\"width: 43%\" class=\"inlineBlock\"><span style=\"padding-right:10px; padding-left:10px\">|</span><span>";

        if(requestInfo.getPublication()!=null && requestInfo.getPublication().getJournal()!=null && requestInfo.getPublication().getJournal().getPublisher()!=null) {

            if(requestInfo.getPublication().getJournal().getPublisher().getName()!=null && requestInfo.getPublication().getJournal().getPublisher().getName().length()>50)

                extraInfoContents += requestInfo.getPublication().getJournal().getPublisher().getName().substring(0, 50) + " ...";

            else

                extraInfoContents += requestInfo.getPublication().getJournal().getPublisher().getName();

        } else if(requestInfo.getPublication()!=null && requestInfo.getPublication().getPublisher()!=null) {

            extraInfoContents += requestInfo.getPublication().getPublisher().getName();

        } else

            extraInfoContents += "---";

        extraInfoContents += "</span></div><div style=\"width: 17%\" class=\"inlineBlock\"><span style=\"padding-right:10px; " +

                "padding-left:10px\">|</span><span>";

        if(requestInfo.getInvoice()!=null)

            extraInfoContents += requestInfo.getInvoice().getNumber();

        else

            extraInfoContents += "---";

        extraInfoContents += "</span></div></div><div style=\"width: 14%\" class=\"inlineBlock\"><span style=\"padding-right:10px; " +

                "padding-left:10px\">|</span><span>";

        if(requestInfo.getFundingRequested()!=null && requestInfo.getCurrency()!=null)

            extraInfoContents += Math.round(requestInfo.getFundingRequested()*100) / 100.0 + " " + requestInfo.getCurrency().toString();

        else

            extraInfoContents += "---";

        extraInfoContents += "</span></div>";

        extraInfo.setHTML(extraInfoContents);

        extraInfo.addStyleName("headingExtraInfo");

        dataRequestAccordionItem.getHeading().add(extraInfo);

        String heading = "(ID: " + requestInfo.getId() + ") " + "\"" + requestInfo.getPublication().getTitle() + "\"";

        dataRequestAccordionItem.setHeading(heading);

        dataRequestAccordionItem.setIcon(IconType.ANGLE_DOWN);

        dataRequestAccordionItem.addShowHandler(new ShowHandler() {

            @Override

            public void onShow(ShowEvent showEvent) {

                dataRequestAccordionItem.setIcon(IconType.ANGLE_UP);

                dataRequestAccordionItem.clear();

                final HTML loadingWheel = new HTML("<div class=\"loader-big\"></div><div class=\"whiteFilm\"></div>");

                FlowPanel accordionInner = new FlowPanel();

                accordionInner.addStyleName("loading");

                accordionInner.add(loadingWheel);

                dataRequestAccordionItem.add(accordionInner);

                dataService.getRequestById(requestInfo.getId(), new AsyncCallback<RequestInfo>() {

                    @Override

                    public void onFailure(Throwable throwable) {

                        dataRequestAccordionItem.clear();

                        Alert errorLabel = new Alert();

                        errorLabel.addStyleName("alertLabel");

                        errorLabel.setType(AlertType.ERROR);

                        errorLabel.setClose(false);

                        errorLabel.setText(goldOAConstants.errorGettingSpecificRequestInfo());

                        dataRequestAccordionItem.add(errorLabel);

                    }

                    @Override

                    public void onSuccess(final RequestInfo requestInfo) {

                        addNewRequestInfo(dataRequestAccordionItem, requestInfo);

                    }

                });

            }

        });

        dataRequestAccordionItem.addHideHandler(new HideHandler() {

            @Override

            public void onHide(HideEvent hideEvent) {

                dataRequestAccordionItem.setIcon(IconType.ANGLE_DOWN);

            }

        });

        requestsListPanel.add(dataRequestAccordionItem);

        requestsList.add(dataRequestAccordionItem);

    }

    private void addNewRequestInfo(final AccordionGroup accordion, final RequestInfo requestInfo) {

        accordion.clear();

        RequestInfoElement requestInfoElement = new RequestInfoElement(requestInfo);

        accordion.add(requestInfoElement.asWidget());

        RequestInfoElement.ActionListener actionListener = new RequestInfoElement.ActionListener() {

            @Override

            public void actionHappened(boolean succeeded, Request.RequestStatus requestStatus, Comment comment) {

                accordion.getHeading().getElement().scrollIntoView();

                if(succeeded) {

                    HTML statusHeading = new HTML();

                    if(requestInfo.getPublication()!=null &&

                            (requestInfo.getPublication().getRepository()!=null || !requestInfo.getPublication().getRepository().equals("")

                                    || requestInfo.getPublication().getDoi()!=null || !requestInfo.getPublication().getDoi().equals(""))) {

                        statusHeading.setHTML("<img src=\"./imgs/warning_h20.png\" /><span class=\"status\">" + requestStatus.getValue().toUpperCase() + "</span>");

                    } else {

                        statusHeading.setHTML("<span class=\"status\">" + requestStatus.getValue().toUpperCase() + "</span>");

                    }

                    statusHeading.addStyleName("float-right");

                    statusHeading.addStyleName("statusHeading");

                    accordion.getHeading().remove(1);

                    accordion.getHeading().insert(statusHeading, 1);

                    String heading = "(ID: " + requestInfo.getId() + ") " + "\"" + requestInfo.getPublication().getTitle() + "\"";

                    accordion.setHeading(heading);

                    requestInfo.setStatus(requestStatus);

                    if(comment!=null)

                        requestInfo.getComments().add(comment);

                    addNewRequestInfo(accordion, requestInfo);

                }

            }

        };

        requestInfoElement.setActionListener(actionListener);

        RequestInfoElement.PublicationUpdatedListener publicationUpdatedListener =

                new RequestInfoElement.PublicationUpdatedListener() {

                    @Override

                    public void publicationUpdated() {

                        accordion.getHeading().getElement().scrollIntoView();

                        HTML statusHeading = new HTML();

                        if(requestInfo.getPublication()!=null &&

                                (requestInfo.getPublication().getRepository()!=null || !requestInfo.getPublication().getRepository().equals("")

                                        || requestInfo.getPublication().getDoi()!=null || !requestInfo.getPublication().getDoi().equals(""))) {

                            statusHeading.setHTML("<img src=\"./imgs/warning_h20.png\" /><span class=\"status\">" + requestInfo.getStatus().getValue().toUpperCase() + "</span>");

                        } else {

                            statusHeading.setHTML("<span class=\"status\">" + requestInfo.getStatus().getValue().toUpperCase() + "</span>");

                        }

                        statusHeading.addStyleName("float-right");

                        statusHeading.addStyleName("statusHeading");

                        accordion.getHeading().remove(1);

                        accordion.getHeading().insert(statusHeading, 1);

                        String heading = "(ID: " + requestInfo.getId() + ") " + "\"" + requestInfo.getPublication().getTitle() + "\"";

                        accordion.setHeading(heading);

                        addNewRequestInfo(accordion, requestInfo);

                    }

                };

        requestInfoElement.setPublicationUpdatedListener(publicationUpdatedListener);

    }

    private void previousPage() {

        final int pageSize = requestInfoPage.getTo() - requestInfoPage.getFrom() + 1;

        if(requestInfoPage !=null ) {

            int from = requestInfoPage.getFrom() - pageSize;

            int to = requestInfoPage.getTo() - pageSize;

            RequestSort requestSort = RequestSort.valueOf(sortByTypes.getSelectedValue());

            RequestSortOrder requestSortOrder = RequestSortOrder.valueOf(orderByTypes.getSelectedValue());

            String term = null;

            if(!search.getValue().trim().equals(""))

                term = search.getValue().trim();

            List<String> selectedStatuses = dropdownCheckbox.getSelectedStatuses();

            if(selectedStatuses.isEmpty()) {

                loadRequests(null, null, requestSort, requestSortOrder, null, term, null, from, to);

            } else {

                Request.RequestStatus[] statuses = new Request.RequestStatus[selectedStatuses.size()];

                for(int i=0; i<selectedStatuses.size(); i++) {

                    statuses[i] = Request.RequestStatus.valueOf(selectedStatuses.get(i));

                }

                loadRequests(null, null, requestSort, requestSortOrder, null, term, statuses, from, to);

            }

        }

    }

    private void nextPage() {

        final int pageSize = requestInfoPage.getTo() - requestInfoPage.getFrom() + 1;

        if(requestInfoPage!=null) {

            int from = requestInfoPage.getFrom() + pageSize;

            int to = requestInfoPage.getTo() + pageSize;

            RequestSort requestSort = RequestSort.valueOf(sortByTypes.getSelectedValue());

            RequestSortOrder requestSortOrder = RequestSortOrder.valueOf(orderByTypes.getSelectedValue());

            String term = null;

            if(!search.getValue().trim().equals(""))

                term = search.getValue().trim();

            List<String> selectedStatuses = dropdownCheckbox.getSelectedStatuses();

            if(selectedStatuses.isEmpty()) {

                loadRequests(null, null, requestSort, requestSortOrder, null, term, null, from, to);

            } else {

                Request.RequestStatus[] statuses = new Request.RequestStatus[selectedStatuses.size()];

                for(int i=0; i<selectedStatuses.size(); i++) {

                    statuses[i] = Request.RequestStatus.valueOf(selectedStatuses.get(i));

                }

                loadRequests(null, null, requestSort, requestSortOrder, null, term, statuses, from, to);

            }

        }

    }

}