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package de.cowtipper.cowlection.search;
import de.cowtipper.cowlection.config.MooConfig;
import net.minecraft.util.EnumChatFormatting;
import org.apache.commons.io.FileUtils;
import org.apache.commons.lang3.StringUtils;
import java.io.*;
import java.nio.file.Files;
import java.nio.file.Path;
import java.time.*;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import java.util.zip.GZIPInputStream;
class LogFilesSearcher {
private static final Pattern LOG_FILE_PATTERN = Pattern.compile("^(\\d{4})-(\\d{2})-(\\d{2})-\\d+\\.log\\.gz$");
/**
* Log4j.xml PatternLayout: [%d{HH:mm:ss}] [%t/%level]: %msg%n
* Log line: [TIME] [THREAD/LEVEL]: [CHAT] msg
* examples:
* - [13:33:37] [Client thread/INFO]: [CHAT] Hello World
* - [08:15:42] [Client thread/ERROR]: Item entity 9001 has no item?!
*/
private static final Pattern LOG4J_PATTERN = Pattern.compile("^\\[(?<timeHours>[\\d]{2}):(?<timeMinutes>[\\d]{2}):(?<timeSeconds>[\\d]{2})] \\[(?<thread>[^/]+)/(?<logLevel>[A-Z]+)]:(?<isChat> \\[CHAT])? (?<message>.*)$");
private int analyzedFilesWithHits = 0;
LogSearchResults searchFor(String searchQuery, boolean chatOnly, boolean matchCase, boolean removeFormatting, LocalDate dateStart, LocalDate dateEnd) throws IOException {
LogSearchResults logSearchResults = new LogSearchResults();
long fileSizeLimit = MooConfig.getMaxLogFileSize();
long latestLogSizeLimit = MooConfig.getMaxLatestLogFileSize();
for (String logsDirPath : MooConfig.logsDirs) {
File logsDir = new File(logsDirPath);
if (!logsDir.exists() || !logsDir.isDirectory()) {
continue;
}
try (Stream<Path> paths = Files.find(logsDir.toPath(), 1, (path, attr) -> {
if (!attr.isRegularFile()) {
return false;
}
String fileName = path.getFileName().toString();
return fileName.endsWith(".log.gz") || "latest.log".equals(fileName);
}).collect(Collectors.toList()).parallelStream()) {
paths.forEach(path -> {
String fileName = path.getFileName().toString();
if (fileName.endsWith("z")) { // .log.gz
Matcher fileNameMatcher = LOG_FILE_PATTERN.matcher(fileName);
if (fileNameMatcher.matches()) {
LocalDate fileLocalDate = LocalDate.of(Integer.parseInt(fileNameMatcher.group(1)),
Integer.parseInt(fileNameMatcher.group(2)), Integer.parseInt(fileNameMatcher.group(3)));
if (!fileLocalDate.isBefore(dateStart) && !fileLocalDate.isAfter(dateEnd)) {
if (path.toFile().length() > fileSizeLimit) {
// .log.gz file too large
logSearchResults.addSkippedFile();
} else {
logSearchResults.addAnalyzedFile();
logSearchResults.addSearchResults(analyzeFile(path, true, fileLocalDate, searchQuery, chatOnly, matchCase, removeFormatting));
}
}
}
} else if (fileName.equals("latest.log")) {
LocalDate lastModified = Instant.ofEpochMilli(path.toFile().lastModified()).atZone(ZoneId.systemDefault()).toLocalDate();
if (!lastModified.isBefore(dateStart) && !lastModified.isAfter(dateEnd)) {
if (path.toFile().length() > latestLogSizeLimit) {
// latest.log too large
logSearchResults.addSkippedFile();
} else {
logSearchResults.addAnalyzedFile();
logSearchResults.addSearchResults(analyzeFile(path, false, lastModified, searchQuery, chatOnly, matchCase, removeFormatting));
}
}
}
});
} catch (IOException e) {
throw new IOException(EnumChatFormatting.DARK_RED + "ERROR: An error occurred trying to read/parse '" + EnumChatFormatting.RED + logsDirPath + EnumChatFormatting.DARK_RED + "':\n"
+ EnumChatFormatting.GOLD + e.getLocalizedMessage(), e);
}
}
if (logSearchResults.getAnalyzedFiles() == 0) {
// no files were analyzed
int skippedFileCounter = logSearchResults.getSkippedFiles();
if (skippedFileCounter > 0) {
throw new FileNotFoundException(EnumChatFormatting.DARK_RED + "ERROR: No Minecraft log files could be found for the selected date range.\n"
+ EnumChatFormatting.RED + skippedFileCounter + EnumChatFormatting.DARK_RED + " log files were skipped because they are too large (" + EnumChatFormatting.RED + ".log.gz" + EnumChatFormatting.DARK_RED + " files >" + FileUtils.byteCountToDisplaySize(MooConfig.getMaxLogFileSize()) + "; " + EnumChatFormatting.RED + "latest.log" + EnumChatFormatting.DARK_RED + " >" + FileUtils.byteCountToDisplaySize(MooConfig.getMaxLatestLogFileSize()) + ").\n"
+ EnumChatFormatting.RED + "Please check if the dates as well as the directories of the log files are set correctly (Log Search ➡ Settings [top right corner]).\n"
+ EnumChatFormatting.DARK_RED + "You could also increase the maximum allowed log file size to be searched (Log Search ➡ Settings), but note that each file must be unzipped before it can be analyzed, which can make the log file search take significantly longer for large files.");
} else {
throw new FileNotFoundException(EnumChatFormatting.DARK_RED + "ERROR: No Minecraft log files could be found for the selected date range.\n"
+ EnumChatFormatting.RED + "Please check if the dates as well as the directories of the log files are set correctly (Log Search ➡ Settings [top right corner]).");
}
} else {
logSearchResults.setAnalyzedFilesWithHits(analyzedFilesWithHits);
return logSearchResults;
}
}
private List<LogEntry> analyzeFile(Path path, boolean isGzipped, LocalDate date, String searchTerm, boolean chatOnly, boolean matchCase, boolean removeFormatting) {
List<LogEntry> searchResults = new ArrayList<>();
boolean foundSearchTermInFile = false;
try (BufferedReader in = (isGzipped
? new BufferedReader(new InputStreamReader(new GZIPInputStream(new FileInputStream(path.toFile())))) // ....log.gz
: new BufferedReader(new InputStreamReader(new FileInputStream(path.toFile()))))) { // latest.log
String content;
LogEntry logEntry = null;
while ((content = in.readLine()) != null) {
Matcher logLineMatcher = LOG4J_PATTERN.matcher(content);
if (logLineMatcher.matches()) { // current line is a new log entry
if (logEntry != null) {
// we had a previous log entry; analyze it!
LogEntry result = analyzeLogEntry(logEntry, searchTerm, matchCase, removeFormatting);
if (result != null) {
searchResults.add(result);
foundSearchTermInFile = true;
}
logEntry = null;
}
// handle first line of new log entry
if (chatOnly && logLineMatcher.group("isChat") == null) {
// not a chat log entry, although we're only searching for chat messages, abort!
continue;
}
LocalDateTime dateTime = getDate(date, logLineMatcher);
logEntry = new LogEntry(dateTime, path, logLineMatcher.group("message"));
} else if (logEntry != null) {
// multiline log entry
logEntry.addLogLine(content);
}
}
if (logEntry != null) {
// end of file! analyze last log entry in file
LogEntry result = analyzeLogEntry(logEntry, searchTerm, matchCase, removeFormatting);
if (result != null) {
searchResults.add(result);
foundSearchTermInFile = true;
}
}
if (foundSearchTermInFile) {
analyzedFilesWithHits++;
}
} catch (IOException ignored) {
// most likely corrupted .log.gz file - skip it.
}
return searchResults;
}
private LocalDateTime getDate(LocalDate date, Matcher logLineMatcher) {
int hour = Integer.parseInt(logLineMatcher.group(1));
int minute = Integer.parseInt(logLineMatcher.group(2));
int sec = Integer.parseInt(logLineMatcher.group(3));
return LocalDateTime.of(date, LocalTime.of(hour, minute, sec));
}
private LogEntry analyzeLogEntry(LogEntry logEntry, String searchTerms, boolean matchCase, boolean removeFormatting) {
if (logEntry.getMessage().length() > 5000) {
// avoid ultra long log entries
return null;
}
logEntry.fixWeirdCharacters();
if (removeFormatting) {
logEntry.removeFormatting();
}
String logMessage = logEntry.getMessage();
if (!matchCase) {
if (!StringUtils.containsIgnoreCase(logMessage, searchTerms)) {
// no result, abort
return null;
}
} else if (!logMessage.contains(searchTerms)) {
// no result, abort
return null;
}
return logEntry;
}
}
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