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/*
 *   Copyright 2013 Brian Rosenberger (Brutex Network)
 *
 *   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 net.brutex.svn;

import java.util.ArrayList;
import java.util.Date;
import java.util.Iterator;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.apache.log4j.Logger;

/**
 * The Class SVNCommitInfo represents changes commited to 
 * a svn repository. The information is based on svnlook.
 * 
 * 'A ' Object dem Projektarchiv hinzugefügt
 * 'D ' Objekt aus dem Projektarchiv gelöscht
 * 'U ' Dateiinhalt geändert
 * '_U' Eigenschaften eines Objektes geändert
 * 'UU' Dateiinhalt und Eigenschaften geändert
 *
 * @author Brian Rosenberger, bru(at)brutex.de
 * @since 0.1
 * 
 */
public class SVNCommitInfo {
        
        /** The logger. */
        private final Logger logger = Logger.getLogger(SVNCommitInfo.class);
        
        /** The author. */
        private final String author;
        
        /** The commit message */
        private final String logmessage;
        
        /** The date. */
        private final Date date;
        
        /** The Alist. */
        private final List<String> Alist = new ArrayList<String>(0);
        
        /** The Dlist. */
        private final List<String> Dlist = new ArrayList<String>(0);
        
        /** The Ulist. */
        private final List<String> Ulist = new ArrayList<String>(5);
        
        /** The _ ulist. */
        private final List<String> _Ulist = new ArrayList<String>(0);
        
        /** The U ulist. */
        private final List<String> UUlist = new ArrayList<String>(0);
        
        /** The issues. */
        private final List<String> issues = new ArrayList<String>(1);
        
        /** The txn. */
        private String txn="";
        
        /** The rev. */
        private String rev="";
        
        
        /**
         * Instantiates a new SVN commit info.
         *
         * @param author the commiter
         * @param date the commit date
         * @param logmessage the commit message
         */
        public SVNCommitInfo(String author, Date date, String logmessage) {
                this.author = author;
                this.date = date;
                this.logmessage = logmessage;
        }
        
        /**
         * Adds the file info.
         *
         * @param t the t
         * @param file the file
         */
        public void addFileInfo(ChangeType t, String file) {
                switch (t) {
                case ADDED:
                        Alist.add(file);
                        break;
                case DELETED:
                        Dlist.add(file);
                        break;
                case UPDATED:
                        Ulist.add(file);
                        break;
                case METAUPDATE:
                        _Ulist.add(file);
                        break;
                case BOTHUPDATE:
                        UUlist.add(file);
                        break;                          

                default:
                        break;
                }
        }
        
        /**
         * Gets the author.
         *
         * @return the author
         */
        public String getAuthor() {
                return author;
        }
        
        /**
         * Gets the commit message.
         *
         * @return the commit message
         */
        public String getLogmessage() {
                return logmessage;
        }
        
        /**
         * Gets the commit date.
         *
         * @return the commit date
         */
        public Date getDate() {
                return date;
        }
        
        /**
         * Gets the svn transaction id.
         *
         * @return the txn
         */
        public String getTxn() {
                return txn;
        }
        
        /**
         * Sets the txn.
         *
         * @param txn the new txn
         */
        public void setTxn(String txn) {
                this.txn = txn;
        }
        
        /**
         * Gets the id. This is either the txn or revision.
         *
         * @return the id
         */
        public String getId() {
                if(txn!=null) return txn;
                return rev;
        }
        
        /**
         * Sets the rev.
         *
         * @param rev the new rev
         */
        public void setRev(String rev) {
                this.rev = rev;
        }
        
        /**
         * Gets the rev.
         *
         * @return the rev
         */
        public String getRev() {
                return rev;
        }
        /*
         * http://openbook.galileocomputing.de/javainsel9/javainsel_04_007.htm#mjd5b5d84cb3f1b5bcb7638ea9221a491f
         */
        /**
         * Parses the issues.
         *
         * @param patterns the patterns
         */
        public void parseIssues(String[] patterns) {
                issues.clear(); //reset
                int count = 0;
                for(String p : patterns) {
                        Pattern regex = Pattern.compile(p);
                        Matcher matcher = regex.matcher(logmessage);
                        logger.debug(String.format("Matching regex pattern '%s' against logmessage '%s'.", matcher.pattern().pattern(), logmessage));
                        while( matcher.find()) {
                                issues.add( matcher.group() );
                                logger.debug("Found  issue '" + matcher.group() + "' in the logmessage.");
                                count++;
                        }
                }
                logger.debug("Found '" + count + "' issues in the logmessage.");
        }
        
        /**
         * Gets the change file list as string.
         *
         * @return the change file list as string
         */
        public String getChangeFileListAsString() {
                StringBuilder sb = new StringBuilder();
                for (Iterator<String> iterator = Alist.iterator(); iterator.hasNext();)
                {
                        sb.append("A \t");
                        sb.append(iterator.next());
                        sb.append("\n");
                }
                for (Iterator<String> iterator = Dlist.iterator(); iterator.hasNext();)
                {
                        sb.append("D \t");
                        sb.append(iterator.next());
                        sb.append("\n");
                }
                for (Iterator<String> iterator = Ulist.iterator(); iterator.hasNext();)
                {
                        sb.append("U \t");
                        sb.append(iterator.next());
                        sb.append("\n");
                }
                for (Iterator<String> iterator = _Ulist.iterator(); iterator.hasNext();)
                {
                        sb.append("_U\t");
                        sb.append(iterator.next());
                        sb.append("\n");
                }
                for (Iterator<String> iterator = UUlist.iterator(); iterator.hasNext();)
                {
                        sb.append("UU\t");
                        sb.append(iterator.next());
                        sb.append("\n");
                }
                
                sb.append("Summary: " + (Ulist.size()+UUlist.size()+_Ulist.size()) + " files updated, ");
                sb.append(Alist.size() + " files added, " + Dlist.size() + " files deleted.");
                return sb.toString();           
        }
        
        /**
         * Gets the added files.
         *
         * @return the added files
         */
        public List<String> getAddedFiles() {
                return Alist;
        }
        
        /**
         * Gets the deleted files.
         *
         * @return the deleted files
         */
        public List<String> getDeletedFiles() {
                return Dlist;
        }
        
        /**
         * Gets the changed files.
         *
         * @return the changed files
         */
        public List<String> getChangedFiles() {
                List<String> changed = new ArrayList<String>();
                changed.addAll(Ulist);
                changed.addAll(UUlist);
                changed.addAll(_Ulist);
                return changed;
        }
        
        /**
         * Gets the issues.
         *
         * @return the issues
         */
        public List<String> getIssues() {
                return issues;
        }
        
        
        /**
         * The Enum ChangeType.
         *
         * @author Brian Rosenberger, bru(at)brutex.de
         */
        public enum ChangeType {
                
                /** The added. */
                ADDED("A "), 
 /** The deleted. */
 DELETED("D "), 
 /** The updated. */
 UPDATED("U "), 
 /** The metaupdate. */
 METAUPDATE("_U"), 
 /** The bothupdate. */
 BOTHUPDATE("UU");
                
                /** The indicator. */
                private final String indicator;
                
                /**
                 * Instantiates a new change type.
                 *
                 * @param svn the svn
                 */
                private ChangeType(String svn) {
                        this.indicator = svn;
                }
                
                /**
                 * Gets the enum.
                 *
                 * @param s the s
                 * @return the enum
                 */
                public static ChangeType getEnum(String s) {
                        for(ChangeType e : ChangeType.values()) {
                                if(s.equals(e.getIndicator())) return e;
                        }
                        throw new IllegalArgumentException("ChangeType enum for value '"+s+"' does not exist.");
                }
                
                /**
                 * Gets the indicator.
                 *
                 * @return the indicator
                 */
                public String getIndicator() {
                        return this.indicator;
                }
        }

}