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/**
 * Copyright 2009 Ashley Williams
 * 
 * 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 protoj.lang.internal.acme;

import java.io.File;

import org.apache.commons.io.FileUtils;
import org.apache.tools.ant.Project;
import org.apache.tools.ant.taskdefs.GUnzip;
import org.apache.tools.ant.taskdefs.Untar;
import org.junit.Assert;

import protoj.lang.ProjectLayout;
import protoj.lang.ScriptSession;
import protoj.util.AntTarget;
import protoj.util.ArgRunnable;
import protoj.util.CommandTask;

/**
 * These assertions trigger when the tar command is specified and ensures that
 * the correct information is sent to stdout and not the log file. We ensure
 * that the includes and excludes settings are respected and also that the
 * -nosrc argument results in the source directory being excluded.
 * 
 * @author Ashley Williams
 * 
 */
final class AssertTar implements ArgRunnable {
	private final AcmeSession acmeSession;

	public AssertTar(AcmeSession acmeSession) {
		this.acmeSession = acmeSession;
	}

	public void run(ScriptSession projectSession) {
		ProjectLayout acmeLayout = acmeSession.getProject().getLayout();
		String log = acmeSession.getProject().getLayout().loadLog();

		File acmeTargetDir = acmeLayout.getTargetDir();
		File extractDir = new File(acmeTargetDir, "assert-tar");
		File acmeDir = new File(extractDir, "acme-1.0");
		File logDir = new File(acmeDir, "log");
		File binDir = new File(acmeDir, "bin");
		File confDir = new File(acmeDir, "conf");
		File propertiesFile = new File(confDir, "all.project.properties");
		File docsDir = new File(acmeDir, "docs");
		File protoLogFile = new File(logDir, "protoj.log");
		File acmeLogFile = new File(logDir, "acme.log");
		File libDir = new File(acmeDir, "lib");
		File javadocJar = new File(libDir, "junit-4.4-javadoc.jar");
		File sourcesJar = new File(libDir, "junit-4.4-sources.jar");
		File aspectJar = new File(libDir, "aspectjrt.jar");
		File targetDir = new File(acmeDir, "target");
		File classesDir = new File(acmeDir, "classes");
		File srcDir = new File(acmeDir, "src");
		File privateDir = new File(acmeDir, "private");
		File redFile = new File(privateDir, "red.txt");
		File partPrivateDir = new File(acmeDir, "part-private");
		File amberFile = new File(partPrivateDir, "amber.txt");
		File greenFile = new File(partPrivateDir, "green.txt");

		Assert.assertTrue(log, log.contains("tar"));
		CommandTask exec = projectSession.getCurrentExec();
		Assert.assertTrue(exec.getResult(), exec.isSuccess());

		extractTarFiles(projectSession, extractDir);

		Assert.assertTrue(acmeDir.exists());
		Assert.assertTrue(binDir.exists());
		Assert.assertTrue(confDir.exists());
		Assert.assertFalse(propertiesFile.exists());
		Assert.assertTrue(docsDir.exists());
		Assert.assertTrue(libDir.exists());
		Assert.assertFalse(javadocJar.exists());
		Assert.assertFalse(sourcesJar.exists());
		Assert.assertTrue(logDir.exists());
		Assert.assertTrue(acmeLogFile.exists());
		Assert.assertFalse(protoLogFile.exists());
		Assert.assertTrue(aspectJar.exists());
		Assert.assertFalse(targetDir.exists());
		Assert.assertFalse(classesDir.exists());
		if (isNosrcSpecified(projectSession)) {
			Assert.assertFalse(srcDir.exists());
		} else {
			Assert.assertTrue(srcDir.exists());
		}
		Assert.assertFalse(privateDir.exists());
		Assert.assertFalse(redFile.exists());
		Assert.assertTrue(partPrivateDir.exists());
		Assert.assertFalse(greenFile.exists());
		Assert.assertTrue(amberFile.exists());

		FileUtils.deleteDirectory(extractDir);
		acmeLayout.getLogFile().delete();
	}

	/**
	 * Extracts the given tar file to the target directory.
	 * 
	 * @param projectSession
	 * @param extractDir
	 * 
	 * @param gzFile
	 * @param tarFile
	 */
	private void extractTarFiles(ScriptSession projectSession, File extractDir) {
		ProjectLayout acmeLayout = acmeSession.getProject().getLayout();

		extractDir.mkdirs();
		File acmeArchiveDir = acmeLayout.getArchiveDir();
		AntTarget target = new AntTarget("protoj-acme-gunzip");
		File gzFile = new File(acmeArchiveDir, "acme.tar.gz");
		File tarFile = new File(acmeArchiveDir, "acme.tar");
		target.initLogging(Project.MSG_INFO);
		GUnzip gunzip = new GUnzip();
		gunzip.setTaskName("gunzip");
		target.addTask(gunzip);
		gunzip.setSrc(gzFile);
		Untar untar = new Untar();
		untar.setTaskName("untar");
		untar.setSrc(tarFile);
		target.addTask(untar);
		untar.setDest(extractDir);
		target.execute();
	}

	private boolean isNosrcSpecified(ScriptSession projectSession) {
		String currentCommand = projectSession.getCurrentCommand();
		return currentCommand.contains("-nosrc");
	}
}