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/*
 * Licensed to Marvelution under one or more contributor license 
 * agreements.  See the NOTICE file distributed with this work 
 * for additional information regarding copyright ownership.
 * Marvelution licenses this file to you 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.marvelution.hudson.plugins.apiv2.utils;

import java.util.HashSet;
import java.util.Set;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * Helper class for Jira Issue and Project Keys
 * 
 * @author Mark Rekveld
 */
public final class JiraKeyUtils {
	
	public static final Pattern DEFAULT_JIRA_PROJECT_KEY_PATTERN = Pattern.compile("\\b([A-Z][A-Z]+)\\b");
	
	public static final Pattern DEFAULT_JIRA_ISSUE_KEY_PATTERN = Pattern.compile("\\b(([a-zA-Z][a-zA-Z0-9_]+)-([1-9][0-9]*))\\b");

	/**
	 * Validates if the given key {@link String} is a valid JIRA Project Key
	 * 
	 * @param key the project key to validate
	 * @return true if valid, false otherwise
	 * @see JiraKeyUtils#isValidProjectKey(String, String)
	 */
	public static boolean isValidProjectKey(String key) {
		return isValidProjectKey(key, DEFAULT_JIRA_PROJECT_KEY_PATTERN);
	}

	/**
	 * Validates if the given key {@link String} is a valid JIRA Project Key
	 * 
	 * @param key the project key to validate
	 * @param keyPattern the {@link Pattern} the key must adhere to
	 * @return true if valid, false otherwise
	 */
	public static boolean isValidProjectKey(String key, Pattern keyPattern) {
		Matcher matcher;
		if (keyPattern != null) {
			matcher = keyPattern.matcher(key);
		} else {
			matcher = DEFAULT_JIRA_PROJECT_KEY_PATTERN.matcher(key);
		}
		return matcher.find() && matcher.start() == 0 && matcher.end() == key.length();
	}

	/**
	 * Find all the Jira Project keys in the given text and return them in a {@link Set}
	 * 
	 * @param text the text to search for Jira Project keys
	 * @return the {@link Set} of found project keys
	 * @see JiraKeyUtils#getJiraProjectKeysFromText(String, String)
	 */
	public static Set getJiraProjectKeysFromText(String text) {
		return getJiraProjectKeysFromText(text, DEFAULT_JIRA_PROJECT_KEY_PATTERN);
	}

	/**
	 * Find all the Jira Project keys in the given text and return them in a {@link Set}
	 * 
	 * @param text the text to search for Jira Project keys
	 * @param keyPattern the {@link Pattern} the key must adhere to
	 * @return the {@link Set} of found project keys
	 */
	public static Set getJiraProjectKeysFromText(String text, Pattern keyPattern) {
		final Set keys = new HashSet();
		Matcher matcher;
		if (keyPattern != null) {
			matcher = keyPattern.matcher(text);
		} else {
			matcher = DEFAULT_JIRA_PROJECT_KEY_PATTERN.matcher(text);
		}
		while (matcher.find()) {
			keys.add(matcher.group());
		}
		return keys;
	}

	/**
	 * Validates if the given key {@link String} is a valid JIRA Issue Key
	 * 
	 * @param key the issue key to validate
	 * @return true if valid, false otherwise
	 * @see JiraKeyUtils#isValidIssueKey(String, String)
	 */
	public static boolean isValidIssueKey(String key) {
		return isValidIssueKey(key, DEFAULT_JIRA_ISSUE_KEY_PATTERN);
	}

	/**
	 * Validates if the given key {@link String} is a valid JIRA Issue Key
	 * 
	 * @param key the issue key to validate
	 * @param keyPattern the {@link Pattern} the key must adhere to
	 * @return true if valid, false otherwise
	 */
	public static boolean isValidIssueKey(String key, Pattern keyPattern) {
		Matcher matcher;
		if (keyPattern != null) {
			matcher = keyPattern.matcher(key);
		} else {
			matcher = DEFAULT_JIRA_ISSUE_KEY_PATTERN.matcher(key);
		}
		return matcher.find() && matcher.start() == 0 && matcher.end() == key.length();
	}

	/**
	 * Find all the Jira Issue keys in the given text and return them in a {@link Set}
	 * 
	 * @param text the text to search for Jira Issue keys
	 * @return the {@link Set} of found issue keys
	 * @see JiraKeyUtils#getJiraIssueKeysFromText(String, String)
	 */
	public static Set getJiraIssueKeysFromText(String text) {
		return getJiraIssueKeysFromText(text, DEFAULT_JIRA_ISSUE_KEY_PATTERN);
	}

	/**
	 * Find all the Jira Issue keys in the given text and return them in a {@link Set}
	 * 
	 * @param text the text to search for Jira Issue keys
	 * @param keyPattern the {@link Pattern} the key must adhere to
	 * @return the {@link Set} of found issue keys
	 */
	public static Set getJiraIssueKeysFromText(String text, Pattern keyPattern) {
		final Set keys = new HashSet();
		Matcher matcher;
		if (keyPattern != null) {
			matcher = keyPattern.matcher(text);
		} else {
			matcher = DEFAULT_JIRA_ISSUE_KEY_PATTERN.matcher(text);
		}
		while (matcher.find()) {
			keys.add(matcher.group());
		}
		return keys;
	}

}