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/**
 * SPDX-FileCopyrightText: (c) 2000 Liferay, Inc. https://liferay.com
 * SPDX-License-Identifier: LGPL-2.1-or-later OR LicenseRef-Liferay-DXP-EULA-2.0.0-2023-06
 */

package com.liferay.jenkins.results.parser;

import java.io.IOException;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Properties;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.apache.commons.lang.StringUtils;

/**
 * @author Peter Yoo
 */
public class AutoCloseUtil {

	public static boolean debug = false;

	public static void autoClose(PullRequest pullRequest, Build build)
		throws Exception {

		if (pullRequest.isAutoCloseCommentAvailable()) {
			return;
		}

		String gitHubReceiverUsername = pullRequest.getOwnerUsername();
		String gitHubSenderUsername = pullRequest.getSenderUsername();

		if ((gitHubReceiverUsername == null) ||
			(gitHubSenderUsername == null) ||
			!_autoCloseReceiverUsernames.contains(gitHubReceiverUsername) ||
			gitHubReceiverUsername.equals(gitHubSenderUsername)) {

			return;
		}

		pullRequest.close();

		StringBuilder sb = new StringBuilder();

		sb.append("The pull request tester is still running.");
		sb.append("Please wait until you get the ");
		sb.append("final report before running 'ci:retest'.");
		sb.append("
See this link to check on the status of your ");
		sb.append("test:");

		sb.append("");
		sb.append(build.getJobName());
		sb.append("
@");
		sb.append(pullRequest.getSenderUsername());
		sb.append("
");

		sb.append("However, the pull request was closed.");
		sb.append("The pull request was closed because the following ");
		sb.append("critical builds had failed:
");

		sb.append("");

		String jobVariant = build.getJobVariant();

		if ((jobVariant != null) && !jobVariant.isEmpty()) {
			sb.append(jobVariant);
		}
		else {
			sb.append(build.getJobName());
		}

		sb.append("
For information as to why we ");
		sb.append("automatically close out certain pull requests see this ");
		sb.append("article.
*");
		}
		else {
			sb.append(" auto-close=\"false\">*This pull will ");
			sb.append("no longer automatically close if this comment is ");
			sb.append("available. ");
		}

		sb.append("If you believe this is a mistake please reopen this ");
		sb.append("pull by entering the following command as a comment.");
		sb.append("ci:reopen
");

		if (sourceFormatBuild) {
			sb.append("*The reopened pull request may ");
			sb.append("be automatically closed again if other critical ");
			sb.append("batches or tests fail.");
		}

		sb.append("
Critical Failure Details:");

		try {
			sb.append(Dom4JUtil.format(build.getGitHubMessageElement(), false));
		}
		catch (Exception exception) {
			exception.printStackTrace();

			throw exception;
		}

		if (!_autoCloseGitHubCommentMentionUsernames.isEmpty()) {
			sb.append("cc");

			for (String autoCloseGitHubCommentMentionUsername :
					_autoCloseGitHubCommentMentionUsernames) {

				sb.append(" @");
				sb.append(autoCloseGitHubCommentMentionUsername);
			}

			sb.append("");
		}

		pullRequest.addComment(sb.toString());
	}

	public static boolean autoCloseOnCriticalBatchFailures(
			PullRequest pullRequest, Build topLevelBuild)
		throws Exception {

		if (pullRequest.isAutoCloseCommentAvailable()) {
			return false;
		}

		String gitHubReceiverUsername = pullRequest.getOwnerUsername();
		String gitHubSenderUsername = pullRequest.getSenderUsername();

		if ((gitHubReceiverUsername == null) ||
			(gitHubSenderUsername == null) ||
			!_autoCloseReceiverUsernames.contains(gitHubReceiverUsername) ||
			gitHubReceiverUsername.equals(gitHubSenderUsername)) {

			return false;
		}

		List autoCloseRules = getAutoCloseRules(pullRequest);

		for (AutoCloseRule autoCloseRule : autoCloseRules) {
			List downstreamBuilds = new ArrayList<>();

			if (topLevelBuild instanceof ParentBuild) {
				ParentBuild parentBuild = (ParentBuild)topLevelBuild;

				downstreamBuilds.addAll(parentBuild.getDownstreamBuilds(null));
			}

			if (downstreamBuilds.isEmpty()) {
				downstreamBuilds = new ArrayList<>();

				downstreamBuilds.add(topLevelBuild);
			}

			List failedDownstreamBuilds = autoCloseRule.evaluate(
				downstreamBuilds);

			if (failedDownstreamBuilds.isEmpty()) {
				continue;
			}

			pullRequest.close();

			StringBuilder sb = new StringBuilder();

			sb.append("The pull request tester is still running.");
			sb.append("Please wait until you get the ");
			sb.append("final report before running 'ci:retest'.");
			sb.append("
See this link to check on the status of your ");
			sb.append("test:");

			sb.append("");
			sb.append(topLevelBuild.getJobName());
			sb.append("
@");
			sb.append(gitHubSenderUsername);
			sb.append("
");

			sb.append("However, the pull request was closed.");
			sb.append("The pull request was closed because the following ");
			sb.append("critical batches had failed:
");

			String failureBuildURL = "";

			for (Build failedDownstreamBuild : failedDownstreamBuilds) {
				failureBuildURL = failedDownstreamBuild.getBuildURL();

				sb.append("");

				String jobVariant = failedDownstreamBuild.getJobVariant();

				if ((jobVariant != null) && !jobVariant.isEmpty()) {
					sb.append(jobVariant);
				}
				else {
					sb.append(failedDownstreamBuild.getJobName());
				}

				sb.append("");
			}

			sb.append("
For information as to why we automatically ");
			sb.append("close out certain pull requests see this ");
			sb.append("article.
*");
			}
			else {
				sb.append(" auto-close=\"false\">*This pull will ");
				sb.append("no longer automatically close if this comment is ");
				sb.append("available. ");
			}

			sb.append("If you believe this is a mistake please reopen this ");
			sb.append("pull by entering the following command as a comment.");
			sb.append("ci:reopen
");

			if (sourceFormatBuild) {
				sb.append("*The reopened pull request may ");
				sb.append("be automatically closed again if other critical ");
				sb.append("batches or tests fail.");
			}

			sb.append("
Critical Failure Details:");

			for (Build failedDownstreamBuild : failedDownstreamBuilds) {
				try {
					sb.append(
						Dom4JUtil.format(
							failedDownstreamBuild.getGitHubMessageElement(),
							false));
				}
				catch (Exception exception) {
					exception.printStackTrace();

					throw exception;
				}
			}

			if (!_autoCloseGitHubCommentMentionUsernames.isEmpty()) {
				sb.append("cc");

				for (String autoCloseGitHubCommentMentionUsername :
						_autoCloseGitHubCommentMentionUsernames) {

					sb.append(" @");
					sb.append(autoCloseGitHubCommentMentionUsername);
				}

				sb.append("");
			}

			pullRequest.addComment(sb.toString());

			return true;
		}

		return false;
	}

	public static boolean autoCloseOnCriticalTestFailures(
			PullRequest pullRequest, Build topLevelBuild)
		throws Exception {

		if (pullRequest.isAutoCloseCommentAvailable() ||
			!isAutoCloseOnCriticalTestFailuresActive(pullRequest)) {

			return false;
		}

		String gitHubReceiverUsername = pullRequest.getOwnerUsername();
		String gitHubSenderUsername = pullRequest.getSenderUsername();

		if ((gitHubReceiverUsername == null) ||
			(gitHubSenderUsername == null) ||
			!_autoCloseReceiverUsernames.contains(gitHubReceiverUsername) ||
			gitHubReceiverUsername.equals(gitHubSenderUsername)) {

			return false;
		}

		Build failedDownstreamBuild = null;
		List jenkinsJobFailureURLs = new ArrayList<>();

		List downstreamBuilds = new ArrayList<>();

		if (topLevelBuild instanceof ParentBuild) {
			ParentBuild parentBuild = (ParentBuild)topLevelBuild;

			downstreamBuilds.addAll(parentBuild.getDownstreamBuilds(null));
		}

		Properties localLiferayJenkinsEEBuildProperties =
			JenkinsResultsParserUtil.getLocalLiferayJenkinsEEBuildProperties();

		for (Build downstreamBuild : downstreamBuilds) {
			String batchName = downstreamBuild.getJobVariant();

			if ((batchName == null) ||
				(!batchName.contains("integration") &&
				 !batchName.contains("unit"))) {

				continue;
			}

			String status = downstreamBuild.getStatus();

			if (!status.equals("completed")) {
				continue;
			}

			String result = downstreamBuild.getResult();

			if ((result == null) || !result.equals("UNSTABLE")) {
				continue;
			}

			String gitSubrepositoryPackageNames =
				JenkinsResultsParserUtil.getProperty(
					localLiferayJenkinsEEBuildProperties,
					"subrepository.package.names");

			if (gitSubrepositoryPackageNames == null) {
				continue;
			}

			for (String gitSubrepositoryPackageName :
					gitSubrepositoryPackageNames.split(",")) {

				if (!jenkinsJobFailureURLs.isEmpty()) {
					break;
				}

				List testResults = new ArrayList<>();

				testResults.addAll(downstreamBuild.getTestResults("FAILED"));
				testResults.addAll(
					downstreamBuild.getTestResults("REGRESSION"));

				for (TestResult testResult : testResults) {
					if (!testResult.isUniqueFailure()) {
						continue;
					}

					if (gitSubrepositoryPackageName.equals(
							testResult.getPackageName())) {

						failedDownstreamBuild = downstreamBuild;

						StringBuilder sb = new StringBuilder();

						sb.append("");
						sb.append(testResult.getClassName());
						sb.append("");

						jenkinsJobFailureURLs.add(sb.toString());
					}
				}
			}
		}

		if (!jenkinsJobFailureURLs.isEmpty()) {
			pullRequest.close();

			StringBuilder sb = new StringBuilder();

			sb.append("The pull request tester is still running.");
			sb.append("Please wait until you get the final report");
			sb.append(" before running 'ci:retest'.
See this ");
			sb.append("link to check on the status of your test:");

			sb.append("");
			sb.append(topLevelBuild.getJobName());
			sb.append("@");
			sb.append(gitHubSenderUsername);
			sb.append("
");

			sb.append("However, the pull request was closed.");
			sb.append("The pull request was closed due to the following ");
			sb.append("integration/unit test failures:
");

			for (String jenkinsJobFailureURL : jenkinsJobFailureURLs) {
				sb.append("");
				sb.append(jenkinsJobFailureURL);
				sb.append("");
			}

			sb.append("
These test failures are a part of a ");
			sb.append("'module group'/'subrepository' that was changed in ");
			sb.append("this pull request.");
			sb.append("*This pull will ");
			sb.append("no longer automatically close if this comment is ");
			sb.append("available. If you believe this is a mistake please ");
			sb.append("reopen this pull by entering the following command ");
			sb.append("as a comment.
ci:reopen");
			sb.append("
Critical Failure Details:");

			try {
				sb.append(
					Dom4JUtil.format(
						failedDownstreamBuild.getGitHubMessageElement(),
						false));
			}
			catch (Exception exception) {
				exception.printStackTrace();

				throw exception;
			}

			if (!_autoCloseGitHubCommentMentionUsernames.isEmpty()) {
				sb.append("cc");

				for (String autoCloseGithubCommentMentionUsername :
						_autoCloseGitHubCommentMentionUsernames) {

					sb.append(" @");
					sb.append(autoCloseGithubCommentMentionUsername);
				}

				sb.append("");
			}

			pullRequest.addComment(sb.toString());

			return true;
		}

		return false;
	}

	public static List getAutoCloseRules(PullRequest pullRequest)
		throws Exception {

		List list = new ArrayList<>();

		String propertyNameTemplate = JenkinsResultsParserUtil.combine(
			"test.batch.names.auto.close[",
			pullRequest.getGitHubRemoteGitRepositoryName(), "?]");

		String gitRepositoryBranchAutoClosePropertyName =
			propertyNameTemplate.replace(
				"?", "-" + pullRequest.getUpstreamRemoteGitBranchName());

		Properties localLiferayJenkinsEEBuildProperties =
			JenkinsResultsParserUtil.getLocalLiferayJenkinsEEBuildProperties();

		String testBatchNamesAutoClose = JenkinsResultsParserUtil.getProperty(
			localLiferayJenkinsEEBuildProperties,
			gitRepositoryBranchAutoClosePropertyName);

		if (testBatchNamesAutoClose == null) {
			String gitRepositoryAutoClosePropertyName =
				propertyNameTemplate.replace("?", "");

			testBatchNamesAutoClose = JenkinsResultsParserUtil.getProperty(
				localLiferayJenkinsEEBuildProperties,
				gitRepositoryAutoClosePropertyName);
		}

		if (testBatchNamesAutoClose != null) {
			if (debug) {
				System.out.println(
					JenkinsResultsParserUtil.combine(
						"Finding auto-close rules for ",
						gitRepositoryBranchAutoClosePropertyName, "."));
			}

			String[] autoCloseRuleDataArray = StringUtils.split(
				testBatchNamesAutoClose, ",");

			for (String autoCloseRuleData : autoCloseRuleDataArray) {
				if (autoCloseRuleData.startsWith("#") ||
					autoCloseRuleData.startsWith("static_")) {

					continue;
				}

				AutoCloseRule newAutoCloseRule = new AutoCloseRule(
					autoCloseRuleData);

				if (debug) {
					System.out.println("\t" + newAutoCloseRule.toString());
				}

				list.add(newAutoCloseRule);
			}

			if (debug) {
				System.out.println(
					JenkinsResultsParserUtil.combine(
						"Finished finding ",
						gitRepositoryBranchAutoClosePropertyName,
						" auto-close rules.\n"));
			}
		}

		return list;
	}

	public static boolean isAutoCloseBranch(PullRequest pullRequest) {
		String gitHubRemoteGitRepositoryName =
			pullRequest.getGitHubRemoteGitRepositoryName();

		String testBranchNamesAutoClose = JenkinsResultsParserUtil.getProperty(
			JenkinsResultsParserUtil.getLocalLiferayJenkinsEEBuildProperties(),
			JenkinsResultsParserUtil.combine(
				"test.branch.names.auto.close[", gitHubRemoteGitRepositoryName,
				"]"));

		String branchName = pullRequest.getUpstreamRemoteGitBranchName();

		if (testBranchNamesAutoClose == null) {
			if (debug) {
				System.out.println(
					JenkinsResultsParserUtil.combine(
						"Auto-close rules are deactivated for ",
						gitHubRemoteGitRepositoryName, "(", branchName, ")."));
			}

			return false;
		}

		List testBranchNamesAutoCloseList = Arrays.asList(
			testBranchNamesAutoClose.split(","));

		return testBranchNamesAutoCloseList.contains(branchName);
	}

	public static boolean isAutoCloseOnCriticalTestFailuresActive(
		PullRequest pullRequest) {

		String criticalTestBranchesString =
			JenkinsResultsParserUtil.getProperty(
				JenkinsResultsParserUtil.
					getLocalLiferayJenkinsEEBuildProperties(),
				JenkinsResultsParserUtil.combine(
					"test.branch.names.critical.test[",
					pullRequest.getGitHubRemoteGitRepositoryName(), "]"));

		if ((criticalTestBranchesString == null) ||
			criticalTestBranchesString.isEmpty()) {

			return false;
		}

		String[] criticalTestBranches = StringUtils.split(
			criticalTestBranchesString, ",");

		for (String criticalTestBranch : criticalTestBranches) {
			if (criticalTestBranch.equals(
					pullRequest.getUpstreamRemoteGitBranchName())) {

				return true;
			}
		}

		return false;
	}

	private static List _getBuildPropertyAsList(String propertyName) {
		try {
			return JenkinsResultsParserUtil.getBuildPropertyAsList(
				true, propertyName);
		}
		catch (IOException ioException) {
			throw new RuntimeException(
				"Unable to get property " + propertyName, ioException);
		}
	}

	private static final List _autoCloseGitHubCommentMentionUsernames =
		_getBuildPropertyAsList("auto.close.github.comment.mention.usernames");
	private static final List _autoCloseReceiverUsernames =
		_getBuildPropertyAsList("auto.close.receiver.usernames");

	private static class AutoCloseRule {

		public AutoCloseRule(String ruleData) {
			this.ruleData = ruleData;

			String[] ruleDataArray = ruleData.split("\\|");

			rulePattern = Pattern.compile(ruleDataArray[0]);

			if (ruleDataArray[1].endsWith("%")) {
				String percentageRule = ruleDataArray[1];

				int i = Integer.parseInt(
					percentageRule.substring(0, percentageRule.length() - 1));

				maxFailPercentage = i / 100;
			}
			else {
				maxFailCount = Integer.parseInt(ruleDataArray[1]);
			}
		}

		public List evaluate(List downstreamBuilds) {
			if (debug) {
				System.out.println(
					JenkinsResultsParserUtil.combine(
						"Evaluating auto-close rule ", toString(), "."));
			}

			try {
				downstreamBuilds = getMatchingBuilds(downstreamBuilds);

				if (debug) {
					System.out.println(
						JenkinsResultsParserUtil.combine(
							"Found ", String.valueOf(downstreamBuilds.size()),
							" builds that match this rule."));
				}

				List failingInUpstreamJobDownstreamBuilds =
					new ArrayList<>(downstreamBuilds.size());

				for (Build downstreamBuild : downstreamBuilds) {
					if (downstreamBuild.isFailing()) {
						failingInUpstreamJobDownstreamBuilds.add(
							downstreamBuild);

						continue;
					}

					List uniqueFailureTestResults =
						downstreamBuild.getUniqueFailureTestResults();

					if (uniqueFailureTestResults.isEmpty()) {
						failingInUpstreamJobDownstreamBuilds.add(
							downstreamBuild);
					}
				}

				if (debug) {
					System.out.println(
						JenkinsResultsParserUtil.combine(
							String.valueOf(
								failingInUpstreamJobDownstreamBuilds.size()),
							" downstream builds are also failing in ",
							"upstream."));
				}

				downstreamBuilds.removeAll(
					failingInUpstreamJobDownstreamBuilds);

				if (downstreamBuilds.isEmpty()) {
					if (debug) {
						System.out.println(toString() + " has PASSED.");
					}

					return Collections.emptyList();
				}

				List failedDownstreamBuilds = new ArrayList<>(
					downstreamBuilds.size());

				int failLimit = 0;

				if (maxFailPercentage != -1) {
					failLimit =
						(int)(maxFailPercentage * downstreamBuilds.size());

					if (failLimit > 0) {
						failLimit--;
					}
				}
				else {
					failLimit = maxFailCount;
				}

				if (debug) {
					System.out.println(
						JenkinsResultsParserUtil.combine(
							toString(), " fail limit is ",
							String.valueOf(failLimit)));
				}

				for (Build downstreamBuild : downstreamBuilds) {
					String status = downstreamBuild.getStatus();

					if (!status.equals("completed")) {
						continue;
					}

					String result = downstreamBuild.getResult();

					if ((result != null) && !result.equals("SUCCESS")) {
						if (debug) {
							System.out.println(
								JenkinsResultsParserUtil.combine(
									"Found a matching failed build. ",
									downstreamBuild.getDisplayName(),
									" has failed."));
						}

						failedDownstreamBuilds.add(downstreamBuild);
					}
				}

				if (failedDownstreamBuilds.size() > failLimit) {
					if (debug) {
						System.out.println(
							JenkinsResultsParserUtil.combine(
								"Found ",
								String.valueOf(failedDownstreamBuilds.size()),
								" matching failed builds.\n", toString(),
								" has FAILED."));
					}

					return failedDownstreamBuilds;
				}

				if (debug) {
					System.out.println(
						JenkinsResultsParserUtil.combine(
							"Found ",
							String.valueOf(failedDownstreamBuilds.size()),
							" matching failed builds.\n", toString(),
							" has PASSED."));
				}

				return Collections.emptyList();
			}
			finally {
				if (debug) {
					System.out.println(
						JenkinsResultsParserUtil.combine(
							"Finished evaluating rule ", toString(), "\n"));
				}
			}
		}

		@Override
		public String toString() {
			return ruleData;
		}

		protected List getMatchingBuilds(List downstreamBuilds) {
			List filteredDownstreamBuilds = new ArrayList<>(
				downstreamBuilds.size());

			for (Build downstreamBuild : downstreamBuilds) {
				String jobVariant = downstreamBuild.getJobVariant();

				if ((jobVariant != null) && !jobVariant.isEmpty()) {
					Matcher matcher = rulePattern.matcher(jobVariant);

					if (matcher.matches()) {
						filteredDownstreamBuilds.add(downstreamBuild);

						continue;
					}
				}

				String jobName = downstreamBuild.getJobName();

				if ((jobName != null) && !jobName.isEmpty()) {
					Matcher matcher = rulePattern.matcher(jobName);

					if (matcher.matches()) {
						filteredDownstreamBuilds.add(downstreamBuild);
					}
				}
			}

			return filteredDownstreamBuilds;
		}

		protected int maxFailCount = -1;
		protected float maxFailPercentage = -1;
		protected String ruleData;
		protected Pattern rulePattern;

	}

}
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