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package com.yahoo.container.handler;
import org.json.JSONException;
import org.json.JSONObject;
import javax.xml.bind.DatatypeConverter;
import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.util.Arrays;
import java.util.Comparator;
public class LogReader {
int numberOfLogs;
public LogReader() {
this.numberOfLogs = -1;
}
public LogReader(int numberOfLogs) {
this.numberOfLogs = numberOfLogs;
}
protected JSONObject readLogs(String logDirectory) throws IOException, JSONException {
JSONObject json = new JSONObject();
File root = new File(logDirectory);
traverse_folder(root, json);
return json;
}
private void traverse_folder(File root, JSONObject json) throws IOException, JSONException {
File[] files = root.listFiles();
Arrays.sort(files,new Comparator<File>(){
public int compare(File f1, File f2)
{
return Long.valueOf(f1.lastModified()).compareTo(f2.lastModified());
} });
Arrays.sort(files, Comparator.reverseOrder());
for(File child : files) {
if (numberOfLogs == 0) return;
JSONObject childJson = new JSONObject();
if(child.isFile()) {
json.put(child.getName(), DatatypeConverter.printBase64Binary(Files.readAllBytes(child.toPath())));
decrementLogNumber();
}
else {
json.put(child.getName(), childJson);
traverse_folder(child, childJson);
}
}
}
private void decrementLogNumber() {
numberOfLogs -= 1;
}
}
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