/*
 * [FileNameSpaceStrip.java]
 *
 * Summary: Strips spaces out of file names, converting them to underscores.
 *
 * Copyright: (c) 2018 Roedy Green, Canadian Mind Products, http://mindprod.com
 *
 * Licence: This software may be copied and used freely for any purpose but military.
 *          http://mindprod.com/contact/nonmil.html
 *
 * Requires: JDK 1.8+
 *
 * Created with: JetBrains IntelliJ IDEA IDE http://www.jetbrains.com/idea/
 *
 * Version History:
 *  1.0 2018-04-19 initial version
 */
package com.mindprod.repair;

import com.mindprod.commandline.CommandLine;
import com.mindprod.common18.EIO;
import com.mindprod.filter.AllButSVNDirectoriesFilter;
import com.mindprod.filter.ExtensionListFilter;

import java.io.File;
import java.io.IOException;

import static java.lang.System.err;
import static java.lang.System.out;

import com.mindprod.commandline.CommandLine;
import com.mindprod.common18.EIO;
import com.mindprod.filter.AllButSVNDirectoriesFilter;
import com.mindprod.filter.ExtensionListFilter;

import java.io.File;
import java.io.IOException;

import static java.lang.System.*;

/**
 * Strips spaces out of file names, converting them to underscores.
 * <p/>
 *
 * @author Roedy Green, Canadian Mind Products
 * @version 1.0 2018-04-19 initial version
 * @since 2018-04-19
 */

public class FileNameSpaceStrip


{
    private static String USAGE =
            "usage: FileNameSpaceStrip dir containing files whose names you want stripped of spaces";


    /**
     * Get rid of spaces in filenames in specified dir
     *
     * @param args dir to tidy
     * @throws java.io.IOException if cannot read or write source files.
     */
    public static void main(final String[] args) throws IOException {
        if (args.length != 1) {
            out.println("Error: " + USAGE);
            System.exit(3);
        }

        final String dirname = args[0];
        final File dir = new File(dirname);
        if (!dir.isDirectory()) {
            out.println(dirname + " must be a directory");
            System.exit(3);
        }
        final String[] filenames = dir.list();
        int count = 0;
        for (String filename : filenames) {
            if (!filename.contains(" ")) {
                continue;
            }
            final String newfilename = filename.replace(' ', '_');
            final File file = new File(dir, filename);
            final File newfile = new File(dir, newfilename);
            file.renameTo(newfile);
            count++;
        } // end for
        out.println("FileNameSpaceStrip modified " + count + " filenames in " + dirname);
    }
}