/**
* Copyright 2015 Nabarun Mondal
* 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 com.noga.njexl.testing;
import com.noga.njexl.lang.extension.TypeUtility;
import org.apache.commons.mail.DefaultAuthenticator;
import org.apache.commons.mail.Email;
import org.apache.commons.mail.SimpleEmail;
import java.io.File;
import java.lang.reflect.Constructor;
import java.net.URL;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.StandardCopyOption;
import java.util.Date;
import java.util.List;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* Utility class to do a lot of utility stuff
*/
public final class Utils {
public static class Mailer{
public static final String MAIL_NS = "__mail__" ;
public static final String SMTP_HOST_KEY = "SMTP_HOST";
public static String SMTP_HOST;
public static final String SMTP_PORT_KEY = "SMTP_PORT";
public static int SMTP_PORT;
public static final String MAIL_FROM_KEY = "MAIL_FROM";
public static String MAIL_FROM;
public static final String MAIL_DOMAIN_KEY = "SMTP_DOMAIN";
public static String MAIL_DOMAIN;
public static final String MAIL_USER_KEY = "SMTP_USER";
public static String MAIL_USER;
public static final String MAIL_PASS_KEY = "SMTP_PASS";
public static String MAIL_PASS;
public static DefaultAuthenticator defaultAuthenticator;
public static int getEnvDefault(String name, int defaultValue){
String s = System.getenv(name);
return TypeUtility.castInteger(s,defaultValue);
}
public static String getEnvDefault(String name, String defaultValue){
String s = System.getenv(name);
if ( s != null ) return s ;
return defaultValue ;
}
static{
try{
SMTP_HOST = getEnvDefault(SMTP_HOST_KEY, "smtp.gmail.com");
SMTP_PORT = getEnvDefault(SMTP_PORT_KEY , 587) ;
MAIL_FROM = getEnvDefault(MAIL_FROM_KEY, "nobody@gmail.com");
MAIL_DOMAIN = getEnvDefault(MAIL_DOMAIN_KEY , "gmail.com");
MAIL_USER = getEnvDefault(MAIL_USER_KEY , "");
MAIL_PASS = getEnvDefault(MAIL_PASS_KEY , "");
defaultAuthenticator = new DefaultAuthenticator( MAIL_USER , MAIL_PASS );
}catch (Exception e){
}
}
static Email createEmail(String subject, String from) {
try {
Email email = new SimpleEmail();
email.setHostName(SMTP_HOST);
email.setSmtpPort(SMTP_PORT);
email.setAuthenticator(defaultAuthenticator);
if ( !from.contains("@")){
from += "@" + MAIL_DOMAIN ;
}
email.setFrom(from);
email.setSubject(subject);
return email;
}catch (Exception e){
System.err.println("Can not create e-mail : " + e);
}
return null;
}
public static boolean send(String from, String subject, String body , String... to ) {
Email email = createEmail(subject,from);
if ( email == null ){
return false;
}
try {
for (int i = 0; i < to.length; i++) {
String mailTo = to[i].trim();
if ( mailTo.isEmpty() ) continue;
if ( !mailTo.contains("@")){
mailTo += "@" + MAIL_DOMAIN ;
}
email.addTo(mailTo);
}
email.setMsg(body);
email.send();
return true;
}catch (Exception e){
System.err.println("Can not send e-mail : " + e);
}
return false;
}
}
public static final String REDIRECT_TO_FILE = "@" ;
public static final Pattern RELOCATE_PATH_PATTERN
= Pattern.compile("\"_/(?<path>[^\"]*)\"", Pattern.MULTILINE);
public static final Pattern VAR_SUBST =
Pattern.compile("\\$\\{(?<name>[_a-zA-Z][_a-zA-Z\\.0-9]*)\\}",
Pattern.MULTILINE);
public static Object createInstance(String className, Object... params) {
try {
Class clazz = Class.forName(className);
if ( params.length == 0 ) {
return clazz.newInstance();
}
//else get the matching constructor ...
Constructor[] constructors = clazz.getDeclaredConstructors();
for ( int i = 0 ; i < constructors.length; i++ ){
if ( params.length == constructors[i].getParameterCount() ){
// may be this ?
return constructors[i].newInstance( params );
}
}
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
public static String readToEnd(String fileName) throws Exception{
List<String> lines = Files.readAllLines(new File(fileName).toPath());
StringBuffer buffer = new StringBuffer();
for(String l : lines ){
buffer = buffer.append(l).append("\n");
}
return buffer.toString();
}
public static void writeFile(String fileName,String data) throws Exception{
Files.write( new File(fileName).toPath(), data.getBytes()) ;
}
public static String getScript(String script) {
String actual = script ;
if (script.startsWith(REDIRECT_TO_FILE)) {
script = script.substring(1);
try {
actual = readToEnd(script);
}catch (Exception e){
// nothing...
}
}
return actual ;
}
public static String relocatePathInXml(String loc, String xml) throws Exception{
Matcher matcher = RELOCATE_PATH_PATTERN.matcher(xml);
while(matcher.find()){
File f = new File( loc + "/" + matcher.group("path") );
String path = f.getCanonicalPath() ;
path = path.replace('\\','/');
xml = matcher.replaceFirst("\"" + path + "\"" );
matcher = RELOCATE_PATH_PATTERN.matcher(xml);
}
return xml ;
}
public static String substituteVariableInXml(String xml, Map<String,String> variables)
throws Exception{
// there is no point?
if ( variables.isEmpty() ) { return xml ; }
// if not, perhaps...?
Matcher matcher = VAR_SUBST.matcher(xml);
while(matcher.find()){
String varName = matcher.group("name");
if ( !variables.containsKey( varName ) ){
throw new Exception(String.format("[%s] is not there in the context", varName));
}
String value = variables.get(varName);
xml = matcher.replaceFirst( value );
matcher = VAR_SUBST.matcher(xml);
}
return xml ;
}
public static String ts(){
return TypeUtility.castString(new Date(), "yyyyMMdd-hhmmss");
}
public static boolean copyFileFromUrl(String url,String dest) {
try {
URL website = new URL(url);
Path target = new File(dest).toPath();
long size = Files.copy(website.openStream(), target, StandardCopyOption.REPLACE_EXISTING);
return size >= 0 ;
}catch (Exception e){
}
return false;
}
}