#! /usr/bin/env php
<?php
// This file is part of BOINC.
// http://boinc.berkeley.edu
// Copyright (C) 2012 University of California
//
// BOINC is free software; you can redistribute it and/or modify it
// under the terms of the GNU Lesser General Public License
// as published by the Free Software Foundation,
// either version 3 of the License, or (at your option) any later version.
//
// BOINC is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
// See the GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with BOINC.  If not, see <http://www.gnu.org/licenses/>.

// Stage an input file: namely,
// - move or copy it to the download hierarchy
// - compute its md5
// - make a gzipped version if needed
//
// Usage (from project dir):
//
// bin/stage_file [--gzip] [--copy] path
//
// --gzip       Make a gzipped version of the file.
//              Use this if you specify <gzip> in the <file_info>
// --copy       Copy the file (default is to move it)
//
// path         The file to be staged.
//              If it's a directory, stage all the files in that dir

function error_exit($msg) {
    echo $msg;
    exit(1);
}

if (!file_exists("html/inc/dir_hier.inc")
    || !file_exists("config.xml")
) {
    error_exit("This script must be run in the project directory.\n");
}

require_once("html/inc/dir_hier.inc");
require_once("html/inc/util_basic.inc");

function usage() {
    error_exit("usage: stage_file [--gzip] [--copy] path
    --gzip      make a gzipped version of file for compressed download
                (use with <gzip/> in the input template)
    --copy      copy the file (default is to move it)
    --verbose   verbose output
    path        The file to stage; if directory, stage all files in that dir
");
}

function stage_file($path) {
    global $download_dir, $fanout, $copy, $gzip, $verbose;

    if (!file_exists($path)) error_exit("no such file: $path\n");
    $file = basename($path);
    $dl_path = dir_hier_path($file, $download_dir, $fanout);
    $dl_md5_path = "$dl_path.md5";

    if ($verbose) {
        echo "staging $file to $dl_path\n";
    }

    // compute the file's MD5
    //
    $md5 = md5_file($path);
    $file_size = filesize($path);

    // if file is already in download dir, make sure it's the same file
    //
    if (file_exists($dl_path)) {
        if (file_exists($dl_md5_path)) {
            $x = file_get_contents($dl_md5_path);
            $x = explode(" ", $x);
            $dl_md5 = $x[0];
        } else {
            $dl_md5 = md5_file($dl_path);
        }
        if ($md5 != $dl_md5) {
            error_exit("
There is already a file in your project's download directory with that name,
but with different contents.
This is not allowed by BOINC, which requires that files be immutable.
Please use a different file name.
");
        }
        if ($verbose) {
            echo "    file already exists as $dl_path\n";
        }
    } else {
        // move or copy the file
        //
        if ($copy) {
            $ret = copy($path, $dl_path);
            if (!$ret) error_exit("    copy failed\n");
            if ($verbose) echo "    copied file\n";
        } else {
            $ret = rename($path, $dl_path);
            if (!$ret) error_exit("    copy failed\n");
            if ($verbose) echo "    moved file\n";
        }
        @unlink($dl_md5_path);
    }

    // make MD5 file if needed
    //
    if (!file_exists($dl_md5_path)) {
        $x = $md5." ".$file_size."\n";
        $ret = file_put_contents($dl_md5_path, $x);
        if (!$ret) error_exit("failed to create MD5 file $dl_md5_path\n");
        if ($verbose) echo "    created MD5 file $dl_md5_path\n";
    }

    // make gzipped version if needed
    //
    if ($gzip) {
        $dl_gzip_path = "$dl_path.gz";
        if (!file_exists($dl_gzip_path)) {
            $output = system("gzip -c $dl_path > $dl_gzip_path", $retval);
            if ($retval) {
                error_exit("failed to gzip file: $output\n");
            }
            if ($verbose) echo "    created .gzip file $dl_gzip_path\n";
        }
    }
}

$fanout = parse_config(get_config(), "<uldl_dir_fanout>");
if (!$fanout) error_exit("can't find <uldl_dir_fanout> in config.xml");
$download_dir = parse_config(get_config(), "<download_dir>");
if (!$download_dir) error_exit("can't find <download_dir> in config.xml");
if ($argc < 2) usage();

$gzip = false;
$copy = false;
$verbose = false;

for ($i=1; $i<$argc-1; $i++) {
    switch($argv[$i]) {
    case "--gzip":
        $gzip = true;
        break;
    case "--copy":
        $copy = true;
        break;
    case "--verbose":
        $verbose = true;
        break;
    default:
        usage();
    }
}

$path = $argv[$argc-1];
if (is_dir($path)) {
    $d = opendir($path);
    while ($f = readdir($d)) {
        $p = "$path/$f";
        if (!is_file($p)) continue;
        stage_file($p);
    }
} else {
    stage_file($path);
}

?>