/**

* Copyright 2012-2016 Rufus Pollock.
* Licensed under the MIT license
*/

if (typeof AUTO_TITLE != 'undefined' && AUTO_TITLE == true) {

document.title = location.hostname;

}

if (typeof S3_REGION != 'undefined') {

var BUCKET_URL = 'http://' + location.hostname + '.' + S3_REGION + '.amazonaws.com'; // e.g. just 's3' for us-east-1 region
var BUCKET_WEBSITE_URL = location.protocol + '//' + location.hostname;

}

if (typeof S3BL_IGNORE_PATH == 'undefined' || S3BL_IGNORE_PATH != true) {

var S3BL_IGNORE_PATH = false;

}

if (typeof BUCKET_URL == 'undefined') {

var BUCKET_URL = location.protocol + '//' + location.hostname;

}

if (typeof BUCKET_NAME != 'undefined') {

// if bucket_url does not start with bucket_name,
// assume path-style url
if (!~BUCKET_URL.indexOf(location.protocol + '//' + BUCKET_NAME)) {
  BUCKET_URL += '/' + BUCKET_NAME;
}

}

if (typeof BUCKET_WEBSITE_URL == 'undefined') {

var BUCKET_WEBSITE_URL = BUCKET_URL;

}

if (typeof S3B_ROOT_DIR == 'undefined') {

var S3B_ROOT_DIR = '';

}

if (typeof S3B_SORT == 'undefined') {

var S3B_SORT = 'DEFAULT';

}

if (typeof EXCLUDE_FILE == 'undefined') {

var EXCLUDE_FILE = [];

} else if (typeof EXCLUDE_FILE == 'string') {

var EXCLUDE_FILE = [EXCLUDE_FILE];

}

// tc39.github.io/ecma262/#sec-array.prototype.includes if (!Array.prototype.includes) {

Object.defineProperty(Array.prototype, 'includes', {
  value: function(searchElement, fromIndex) {

    if (this == null) {
      throw new TypeError('"this" is null or not defined');
    }

    // 1. Let O be ? ToObject(this value).
    var o = Object(this);

    // 2. Let len be ? ToLength(? Get(O, "length")).
    var len = o.length >>> 0;

    // 3. If len is 0, return false.
    if (len === 0) {
      return false;
    }

    // 4. Let n be ? ToInteger(fromIndex).
    //    (If fromIndex is undefined, this step produces the value 0.)
    var n = fromIndex | 0;

    // 5. If n ≥ 0, then
    //  a. Let k be n.
    // 6. Else n < 0,
    //  a. Let k be len + n.
    //  b. If k < 0, let k be 0.
    var k = Math.max(n >= 0 ? n : len - Math.abs(n), 0);

    function sameValueZero(x, y) {
      return x === y || (typeof x === 'number' && typeof y === 'number' && isNaN(x) && isNaN(y));
    }

    // 7. Repeat, while k < len
    while (k < len) {
      // a. Let elementK be the result of ? Get(O, ! ToString(k)).
      // b. If SameValueZero(searchElement, elementK) is true, return true.
      if (sameValueZero(o[k], searchElement)) {
        return true;
      }
      // c. Increase k by 1. 
      k++;
    }

    // 8. Return false
    return false;
  }
});

}

jQuery(function($) { getS3Data(); });

// This will sort your file listing by most recently modified. // Flip the comparator to '>' if you want oldest files first. function sortFunction(a, b) {

switch (S3B_SORT) {
  case "OLD2NEW":
    return a.LastModified > b.LastModified ? 1 : -1;
  case "NEW2OLD":
    return a.LastModified < b.LastModified ? 1 : -1;
  case "A2Z":
    return a.Key < b.Key ? 1 : -1;
  case "Z2A":
    return a.Key > b.Key ? 1 : -1;
  case "BIG2SMALL":
    return a.Size < b.Size ? 1 : -1;
  case "SMALL2BIG":
    return a.Size > b.Size ? 1 : -1;
}

}

function getS3Data(marker, html) {

var s3_rest_url = createS3QueryUrl(marker);
// set loading notice
$('#listing')
    .html('<img src="//assets.okfn.org/images/icons/ajaxload-circle.gif" />');
$.get(s3_rest_url)
    .done(function(data) {
      // clear loading notice
      $('#listing').html('');
      var xml = $(data);
      var info = getInfoFromS3Data(xml);

      // Slight modification by FuzzBall03
      // This will sort your file listing based on var S3B_SORT
      // See url for example:
      // http://esp-link.s3-website-us-east-1.amazonaws.com/
      if (S3B_SORT != 'DEFAULT') {
        var sortedFiles = info.files;
        sortedFiles.sort(sortFunction);
        info.files = sortedFiles;
      }

      buildNavigation(info);

      html = typeof html !== 'undefined' ? html + prepareTable(info) :
                                           prepareTable(info);
      if (info.nextMarker != "null") {
        getS3Data(info.nextMarker, html);
      } else {
        document.getElementById('listing').innerHTML =
            '<pre>' + html + '</pre>';
      }
    })
    .fail(function(error) {
      console.error(error);
      $('#listing').html('<strong>Error: ' + error + '</strong>');
    });

}

function buildNavigation(info) {

var root = '<li class="breadcrumb-item"><a href="?prefix=">Root</a></li>'
// $('#bucket_website_url').html(BUCKET_WEBSITE_URL);
if (info.prefix) {
  var processedPathSegments = '';
  var content = $.map(info.prefix.split('/'), function(pathSegment) {
    processedPathSegments =
        processedPathSegments + encodeURIComponent(pathSegment) + '/';
      return '<li class="breadcrumb-item"><a href="?prefix=' + processedPathSegments + '">' + pathSegment +
      '</a></li>';
  });
  $('#navigation').html(root + content.join(''));
} else {
  $('#navigation').html(root);
}

}

function createS3QueryUrl(marker) {

var s3_rest_url = BUCKET_URL;
s3_rest_url += '?delimiter=/';

//
// Handling paths and prefixes:
//
// 1. S3BL_IGNORE_PATH = false
// Uses the pathname
// {bucket}/{path} => prefix = {path}
//
// 2. S3BL_IGNORE_PATH = true
// Uses ?prefix={prefix}
//
// Why both? Because we want classic directory style listing in normal
// buckets but also allow deploying to non-buckets
//

var rx = '.*[?&]prefix=' + S3B_ROOT_DIR + '([^&]+)(&.*)?$';
var prefix = '';
if (S3BL_IGNORE_PATH == false) {
  var prefix = location.pathname.replace(/^\//, S3B_ROOT_DIR);
}
var match = location.search.match(rx);
if (match) {
  prefix = S3B_ROOT_DIR + match[1];
} else {
  if (S3BL_IGNORE_PATH) {
    var prefix = S3B_ROOT_DIR;
  }
}
if (prefix) {
  // make sure we end in /
  var prefix = prefix.replace(/\/$/, '') + '/';
  s3_rest_url += '&prefix=' + prefix;
}
if (marker) {
  s3_rest_url += '&marker=' + marker;
}
return s3_rest_url;

}

function getInfoFromS3Data(xml) {

var files = $.map(xml.find('Contents'), function(item) {
  item = $(item);
  // clang-format off
  return {
    Key: item.find('Key').text(),
        LastModified: item.find('LastModified').text(),
        Size: bytesToHumanReadable(item.find('Size').text()),
        Type: 'file'
  }
  // clang-format on
});
var directories = $.map(xml.find('CommonPrefixes'), function(item) {
  item = $(item);
  // clang-format off
  return {
    Key: item.find('Prefix').text(),
      LastModified: '',
      Size: '0',
      Type: 'directory'
  }
  // clang-format on
});
if ($(xml.find('IsTruncated')[0]).text() == 'true') {
  var nextMarker = $(xml.find('NextMarker')[0]).text();
} else {
  var nextMarker = null;
}
// clang-format off
return {
  files: files,
  directories: directories,
  prefix: $(xml.find('Prefix')[0]).text(),
  nextMarker: encodeURIComponent(nextMarker)
}
// clang-format on

}

// info is object like: // { // files: .. // directories: .. // prefix: … // } function prepareTable(info) {

var files = info.directories.concat(info.files), prefix = info.prefix;
var cols = [45, 30, 15];
var content = [];
content.push(padRight('Last Modified', cols[1]) + '  ' +
             padRight('Size', cols[2]) + 'Key \n');
content.push(new Array(cols[0] + cols[1] + cols[2] + 4).join('-') + '\n');

// add ../ at the start of the dir listing, unless we are already at root dir
if (prefix && prefix !== S3B_ROOT_DIR) {
  var up = prefix.replace(/\/$/, '').split('/').slice(0, -1).concat('').join(
          '/'),  // one directory up
      item =
          {
            Key: up,
            LastModified: '',
            Size: '',
            keyText: '../',
            href: S3BL_IGNORE_PATH ? '?prefix=' + up : '../'
          },
      row = renderRow(item, cols);
  content.push(row + '\n');
}

jQuery.each(files, function(idx, item) {
  // strip off the prefix
  item.keyText = item.Key.substring(prefix.length);
  if (item.Type === 'directory') {
    if (S3BL_IGNORE_PATH) {
      item.href = location.protocol + '//' + location.hostname +
                  location.pathname + '?prefix=' + item.Key;
    } else {
      item.href = item.keyText;
    }
  } else {
    item.href = BUCKET_WEBSITE_URL + '/' + encodeURIComponent(item.Key);
    item.href = item.href.replace(/%2F/g, '/');
  }
  var row = renderRow(item, cols);
  if (!EXCLUDE_FILE.includes(item.Key))
    content.push(row + '\n');
});

return content.join('');

}

function renderRow(item, cols) {

var row = '';
row += padRight(item.LastModified, cols[1]) + '  ';
row += padRight(item.Size, cols[2]);
row += '<a href="' + item.href + '">' + item.keyText + '</a>';
return row;

}

function padRight(padString, length) {

var str = padString.slice(0, length - 3);
if (padString.length > str.length) {
  str += '...';
}
while (str.length < length) {
  str = str + ' ';
}
return str;

}

function bytesToHumanReadable(sizeInBytes) {

var i = -1;
var units = [' kB', ' MB', ' GB'];
do {
  sizeInBytes = sizeInBytes / 1024;
  i++;
} while (sizeInBytes > 1024);
return Math.max(sizeInBytes, 0.1).toFixed(1) + units[i];

}