Adding support for books made from /einfo

Essentials/src/com/earth2me/essentials/textreader/BookInput.java

@@ -0,0 +1,124 @@
+package com.earth2me.essentials.textreader;
+
+import com.earth2me.essentials.IEssentials;
+import java.io.*;
+import java.lang.ref.SoftReference;
+import java.util.*;
+
+
+public class BookInput implements IText
+{
+	private final transient List<String> lines;
+	private final transient List<String> chapters;
+	private final transient Map<String, Integer> bookmarks;
+	private final transient long lastChange;
+	private final static HashMap<String, SoftReference<BookInput>> cache = new HashMap<String, SoftReference<BookInput>>();
+
+	public BookInput(final String filename, final boolean createFile, final IEssentials ess) throws IOException
+	{
+
+		File file = null;		
+		if (file == null || !file.exists())
+		{
+			file = new File(ess.getDataFolder(), filename + ".txt");
+		}
+		if (file.exists())
+		{
+			lastChange = file.lastModified();
+			boolean readFromfile;
+			synchronized (cache)
+			{
+				final SoftReference<BookInput> inputRef = cache.get(file.getName());
+				BookInput input;
+				if (inputRef == null || (input = inputRef.get()) == null || input.lastChange < lastChange)
+				{
+					lines = new ArrayList<String>();
+					chapters = new ArrayList<String>();
+					bookmarks = new HashMap<String, Integer>();
+					cache.put(file.getName(), new SoftReference<BookInput>(this));
+					readFromfile = true;
+				}
+				else
+				{
+					lines = Collections.unmodifiableList(input.getLines());
+					chapters = Collections.unmodifiableList(input.getChapters());
+					bookmarks = Collections.unmodifiableMap(input.getBookmarks());
+					readFromfile = false;
+				}
+			}
+			if (readFromfile)
+			{
+				final BufferedReader bufferedReader = new BufferedReader(new FileReader(file));
+				try
+				{
+					int lineNumber = 0;
+					while (bufferedReader.ready())
+					{
+						final String line = bufferedReader.readLine();
+						if (line == null)
+						{
+							break;
+						}
+						if (line.length() > 0 && line.charAt(0) == '#')
+						{
+							bookmarks.put(line.substring(1).toLowerCase(Locale.ENGLISH).replaceAll("&[0-9a-fk]", ""), lineNumber);
+							chapters.add(line.substring(1).replace('&', '§').replace("§§", "&"));
+						}
+						lines.add(line.replace('&', '§').replace("§§", "&"));
+						lineNumber++;
+					}
+				}
+				finally
+				{
+					bufferedReader.close();
+				}
+			}
+		}
+		else
+		{
+			lastChange = 0;
+			lines = Collections.emptyList();
+			chapters = Collections.emptyList();
+			bookmarks = Collections.emptyMap();
+			if (createFile)
+			{
+				final InputStream input = ess.getResource(filename + ".txt");
+				final OutputStream output = new FileOutputStream(file);
+				try
+				{
+					final byte[] buffer = new byte[1024];
+					int length = input.read(buffer);
+					while (length > 0)
+					{
+						output.write(buffer, 0, length);
+						length = input.read(buffer);
+					}
+				}
+				finally
+				{
+					output.close();
+					input.close();
+				}
+				throw new FileNotFoundException("File " + filename + ".txt does not exist. Creating one for you.");
+			}
+		}
+	}
+
+	@Override
+	public List<String> getLines()
+	{
+		return lines;
+	}
+
+	@Override
+	public List<String> getChapters()
+	{
+		return chapters;
+	}
+
+	@Override
+	public Map<String, Integer> getBookmarks()
+	{
+		return bookmarks;
+	}
+}