agtemplateweb/src/main/java/br/com/agapesistemas/agtemplate/util/Utils.java

package br.com.agapesistemas.agtemplate.util;

import java.io.Serializable;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.text.ParseException;
import java.util.Date;
import java.util.Random;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.List;
import java.util.Collection;
import jakarta.faces.application.FacesMessage;
import jakarta.faces.context.ExternalContext;
import jakarta.faces.context.FacesContext;
import jakarta.servlet.ServletOutputStream;
import jakarta.servlet.http.HttpServletResponse;
import jakarta.servlet.http.HttpSession;
import jakarta.faces.component.UIViewRoot;
import jakarta.faces.component.UIComponent;
import jakarta.faces.component.UIInput;
import org.primefaces.PrimeFaces;
import jakarta.servlet.http.HttpServletRequest;
import java.util.HashMap;
import java.util.Map;

public class Utils implements Serializable {
    public static final char INFO = 'I';
    public static final char ERRO = 'E';
    public static final char OBSERVACAO = 'O';
    public static final char FATAL = 'F';

    public static void clearSession(){
        getExternalContext().getSessionMap().clear();
        ((HttpSession)getExternalContext().getSession(false)).invalidate();
    }

    public static void download(String nome, byte[] data) throws IOException {
        FacesContext facesContext = FacesContext.getCurrentInstance();
        HttpServletResponse response = (HttpServletResponse) facesContext.getExternalContext().getResponse();
        response.setContentType("application/download");
        response.setHeader("Content-disposition", "attachment;filename=" + nome);
        ServletOutputStream ouputStream = response.getOutputStream();
        ouputStream.write(data, 0, data.length);
        response.getOutputStream().close();
        facesContext.responseComplete();
    }

    public static void download(String nome, File arquivo) throws IOException, Exception {
        byte[] data = fileToByte(arquivo);
        download(nome,data);
    }

    public static byte[] fileToByte(File arquivo) throws Exception {
        FileInputStream fis = new FileInputStream(arquivo);
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        byte[] buffer = new byte[8192];
        int bytesRead = 0;
        while ((bytesRead = fis.read(buffer, 0, 8192)) != -1) {
            baos.write(buffer, 0, bytesRead);
        }
        fis.close();
        baos.close();
        baos.flush();
        return baos.toByteArray();
    }

    public static long getDiasEntreData(Date inicio, Date fim) throws ParseException {
        return (fim.getTime() - inicio.getTime() + 3600000L) / 86400000L;
    }

    public static String getDiretorioReal(String diretorio){
        HttpSession request = (HttpSession) getExternalContext().getSession(false);
        return request.getServletContext().getRealPath(diretorio);
    }

    public static ExternalContext getExternalContext(){
        return FacesContext.getCurrentInstance().getExternalContext();
    }

    /**
    *
    * @param caminho Empresa, forms/crud/EmpresaConsultLazy
    * @param modal true, false
    * @param options
    options.put("width", 640);
       options.put("height", 340);
       options.put("contentWidth", "100%");
       options.put("contentHeight", "100%");
       options.put("headerElement", "customheader");
    **/
    public static void abrirDialogXhtml(String caminho,  boolean modal, Map<String, Object> options) {
        if(options == null){
            options = new HashMap<>();
        }
        options.put("modal", modal);
        /*
        options.put("width", 640);
        options.put("height", 340);
        options.put("contentWidth", "100%");
        options.put("contentHeight", "100%");
        options.put("headerElement", "customheader");
        */
        PrimeFaces.current().dialog().openDynamic(caminho, options, null);
    }

    public static void fecharDialogXhtml(String nome) {
        PrimeFaces.current().dialog().closeDynamic(nome);
    }

    public static void abrirDialogJS(String vwDialog) {
        PrimeFaces.current().executeScript("PF('"+vwDialog+"').show();");
    }

    public static void fecharDialogJS(String vwDialog) {
        PrimeFaces.current().executeScript("PF('"+vwDialog+"').hide();");
    }

    public static void executeScriptJS(String script) {
        PrimeFaces.current().executeScript(script);
    }

    public static String getPaginaAcesso() {
        return ((HttpServletRequest)getExternalContext().getRequest()).getRequestURI();
    }

    public static String getParam(String parametro){
        return FacesContext.getCurrentInstance().getExternalContext().getRequestParameterMap().get(parametro);
    }

    public static Object getSessionObject(String nome){
        return  getExternalContext().getSessionMap().get(nome);
    }

    public static Object removeSessionObject(String nome){
        return  getExternalContext().getSessionMap().remove(nome);
    }

    public boolean isPossuiErro() {
        for (FacesMessage fm : FacesContext.getCurrentInstance().getMessageList()) {
            if (fm.getSeverity().equals(FacesMessage.SEVERITY_ERROR) || fm.getSeverity().equals(FacesMessage.SEVERITY_FATAL)) {
                return true;
            }
        }
        return false;
    }

    public static String gerarSenha(int nCaracteres) {
        char[] letras = "ABCDEFGHIJKLMNOPQRSTUVWXYZ".toCharArray();
        char[] numeros = "0123456789".toCharArray();
        char[] ordem = "01".toCharArray();
        Random rand = new Random();
        StringBuffer sb = new StringBuffer();
        for (int i = 0; i < nCaracteres; i++) {
            int valor = rand.nextInt(ordem.length);
            char character = ordem[valor];
            if(character == '0'){
                valor = rand.nextInt(letras.length);
                character = letras[valor];
            }else{
                valor = rand.nextInt(numeros.length);
                character = numeros[valor];
            }
            sb.append(character);
            }
        return sb.toString();
    }

    public static void setAlerta(String mensagem, char tipo){
        FacesMessage msg = null;
        switch (tipo){
            case 'O' : msg = new FacesMessage(FacesMessage.SEVERITY_WARN, mensagem, "");break;
            case 'I' : msg = new FacesMessage(FacesMessage.SEVERITY_INFO, mensagem, "");break;
            case 'E' : msg = new FacesMessage(FacesMessage.SEVERITY_ERROR, mensagem, "");break;
            case 'F' : msg = new FacesMessage(FacesMessage.SEVERITY_FATAL, mensagem, "");break;
        }
        FacesContext.getCurrentInstance().addMessage(null, msg);
        //Essa linha vai fazer com que suas mensagens sejam armazenadas no escopo de Flash.
        //A duração desse escopo vai ser o suficiente para que você consiga exibir as mensagens adicionadas depois do redirecionamento.
        getExternalContext().getFlash().setKeepMessages(true);
    }

    public static void setSessionObject(String nome, Object objeto){
        getExternalContext().getSessionMap().put(nome, objeto);
    }

    public void resetInput(){
        FacesContext context = FacesContext.getCurrentInstance();
        UIViewRoot viewRoot = context.getViewRoot();
        List<UIComponent> children = viewRoot.getChildren();
        resetInputValues(children);
    }

    private void resetInputValues(List<UIComponent> children) {
        for (UIComponent component : children) {
            if (component.getChildCount() > 0) {
                resetInputValues(component.getChildren());
            } else {
                if (component instanceof UIInput) {
                    UIInput input = (UIInput) component;
                    input.resetValue();
                }
            }
        }
    }

    public static <T> T getBean(String beanName, Class<T> beanClass) {         FacesContext facesContext = FacesContext.getCurrentInstance();        return facesContext.getApplication().evaluateExpressionGet(facesContext, "#{" + beanName + "}", beanClass);    }

    public static void updateRegion(String id){        PrimeFaces.current().ajax().update(id);    }

    public static void updateRegion(Collection<String> ids){        PrimeFaces.current().ajax().update(ids);    }

}