default.js

'use strict';

var instances_data = [];
var loaded_data = {};
var g_app_initialized = false;
var g_data_table = null;
var g_settings = {};

var g_settings_defaults = {
  cost_duration: 'hourly',
  region: 'us-central1',
  reserved_term: 'cud-1y',
  min_memory: 0,
  min_vcpus: 0,
  min_storage: 0,
  selected: '',
  compare_on: false,
  currency: 'USD',
  symbol: '$',
  price: '1',
};

function init_data_table() {
  // create a second header row
  $("#data thead tr").clone(true).appendTo("#data thead");
  // add a text input filter to each column of the new row
  $("#data thead tr:eq(1) th").each(function (i) {
    var title = $(this).text();
    $(this).html("<input type='text' placeholder='Search '" + title + "' />");
    $("input", this).on( "keyup change", function () {
      if (g_data_table.column(i).search() !== this.value) {
        g_data_table.column(i).search(this.value).draw();
      }
    });
  });
  g_data_table = $('#data').DataTable({
    "data": instances_data,
    "rowId": 0,
    "bPaginate": false,
    "bInfo": false,
    "bStateSave": true,
    "orderCellsTop": true,
    "fixedHeader": true,
    "oSearch": {
      "bRegex": true,
      "bSmart": false
    },
    "aoColumnDefs": [
      {
        // The columns below are sorted according to the sort attr of the <span> tag within their data cells
        "aTargets": [
          "memory",
          "vcpus",
          "lnondemand",
          "lnsudc",
          "lnpc",
          "ln1cud",
          "ln3cud",
          "wnondemand",
          "wnsudc",
          "wnpc",
          "wn1cud",
          "wn3cud",
          "network",
        ],
        "sType": "cust-sort"
      },
      {
        // The columns below are hidden by default
        "aTargets": [
          "ssdsupport",
          "network",
          "gpu",
          "tenant",
          "virtualization",
          "benchmark",
          "lnondemand",
          "lnpc",
          "ln3cud",
          "wnondemand",
          "wnpc",
          "wn3cud",
          "cputype",
        ],
        "bVisible": false
      }
    ],
    // default sort by linux cost
    "aaSorting": [
      [10, "asc"]
    ],
    'initComplete': function () {
      // fire event in separate context so that calls to get_data_table()
      // receive the cached object.
      setTimeout(function () {
        on_data_table_initialized();
      }, 0);
    },
    'drawCallback': function () {
      // abort if initialization hasn't finished yet (initial draw)
      if (g_data_table === null) {
        return;
      }

      // Whenever the table is drawn, update the costs. This is necessary
      // because the cost duration may have changed while a filter was being
      // used and so some rows will need updating.
      redraw_costs();
    },
    // Store filtering, sorting, etc - core datatable feature
    'stateSave': true,
    // Allow export to CSV
    'buttons': ['csv']
  });

  g_data_table
    .buttons()
    .container()
    .find('a')
    .addClass('btn btn-primary')
    .appendTo($('#menu > div'));

  return g_data_table;
}

function getParam(obj, key) {
  if (typeof obj[key] === 'undefined') {
    return null;
  }

  return obj[key];
}

$(document).ready(function () {
  $.ajax({
    url: "data.json",
  }).then(function(res) {
    $.ajax({
      url: "currency.json",
    }).then(function(currencies) {
      loaded_data = res;
      var allRegions = [];
      for (var type in res) {
        var typeSize = res[type];

        for (var typeInfo in typeSize) {
          var typeSpecs = (res[type][typeInfo] && typeof res[type][typeInfo].specs !== 'undefined') ? res[type][typeInfo].specs : {};
          var typeRegions = (res[type][typeInfo] && typeof res[type][typeInfo].regions !== 'undefined') ? res[type][typeInfo].regions : {};

          for (var region in typeRegions) {
            if (region !== 'australia' && region !== 'asia' && region !== 'us' && region !== 'asia' && region !== 'europe') {
              if (allRegions.indexOf(region) === -1) {
                allRegions.push(region);
              }
            }
          }
        }
      }
  
      allRegions.sort(function(a, b) { return a.localeCompare(b); }).forEach(function(val) {
        $('#region-menu').append('<li><a href="javascript:;" data-region="' + val + '">' + val + '</a></li>');
      });

      $('#currency-menu').append('<li><a href="javascript:;" data-currency="USD" data-price="1" data-symbol="$">' + 'USD' + '</a></li>');
      for (var val in currencies) {
        $('#currency-menu').append('<li><a href="javascript:;" data-currency="' + val + '" data-price="' + currencies[val]['price'] + '" data-symbol="' + currencies[val]['symbol'] + '">' + val + '</a></li>');
      }

      generate_data_table(g_settings.region);
        init_data_table(instances_data);
      });
  });
});

function getSupportedStr(val) {
  if (val === 1) {
    return 'Supported';
  }
  else if (val === 0) {
    return 'Not supported';
  }
  else if (val === -1) {
    return 'Unknown';
  }

  return null;
}

function generate_data_table(region, multiplier = 1, per_time = 'hourly') {
  var res = loaded_data;

  instances_data.length = 0;

  for (var type in res) {
    if (type === 'license') {
      continue;
    }

    var typeSize = res[type];
    
    for (var typeInfo in typeSize) {
      var row = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0];

      row[0] = typeInfo;
      
      var typeSpecs = (res[type][typeInfo] && typeof res[type][typeInfo].specs !== 'undefined') ? res[type][typeInfo].specs : {};
      var typeRegions = (res[type][typeInfo] && typeof res[type][typeInfo].regions !== 'undefined') ? res[type][typeInfo].regions : {};

      var min_memory = getParam(g_settings, 'min_memory');
      var min_vcpus = getParam(g_settings, 'min_vcpus');
      
      row[1] = getParam(typeSpecs, 'cores');

      if (row[1] < min_vcpus || (min_vcpus && row[1] === 'shared')) {
        continue;
      }

      row[2] = getParam(typeSpecs, 'memory');

      if (Number(row[2]) < Number(min_memory)) {
        continue;
      }

      row[2] = row[2] + ' GiB';

      row[3] = getSupportedStr(getParam(typeSpecs, 'local_ssd'));
      row[4] = getParam(typeSpecs, 'network_egress');
      row[4] = (row[4]) ? row[4] + ' Gigabit' : 'Unknown';
      row[5] = getParam(typeSpecs, 'cpu').join(', ');
      row[6] = getSupportedStr(getParam(typeSpecs, 'gpu'));
      row[7] = getSupportedStr(getParam(typeSpecs, 'sole_tenant'));
      row[8] = getSupportedStr(getParam(typeSpecs, 'nested_virtualization'));
      row[9] = getParam(typeSpecs, 'benchmark');

      var curRegion = getParam(typeRegions, region);
      
      // Linux on demand
      row[10] = curRegion ? getParam(curRegion, 'ondemand') : null;
      row[11] = curRegion ? getParam(curRegion, 'sud') : null;
      row[12] = curRegion ? getParam(curRegion, 'preemptible') : null;
      row[13] = curRegion ? getParam(curRegion, 'cud-1y') : null;
      row[14] = curRegion ? getParam(curRegion, 'cud-3y') : null;

      // Windows on demand
      var cores = (row[1] === 'shared') ? 0 : Number(row[1]);
      var license_cost = (type === 'f1-small' || type === 'g1-small') ? Number(res['license']['win']['low']) : Number(res['license']['win']['high']);
      row[15] = Number(curRegion ? getParam(curRegion, 'ondemand') : 0) + cores * license_cost;
      row[16] = Number(curRegion ? getParam(curRegion, 'sud') : 0) + cores * license_cost;
      row[17] = Number(curRegion ? getParam(curRegion, 'preemptible') : 0) + cores * license_cost;
      row[18] = Number(curRegion ? getParam(curRegion, 'cud-1y') : 0) + cores * license_cost;
      row[19] = Number(curRegion ? getParam(curRegion, 'cud-3y') : 0) + cores * license_cost;
      
      if (row[1] !== 'shared') {
        row[1] += ' vCPUs';
      }

      for (var k = 10; k < 20; k++) {
        if (row[k]) {
          row[k] *= multiplier;
          row[k] = row[k].toFixed(per_time=='secondly' ? 8 : 5).replace(/(0)*$/, '');
          row[k] += ' ' + per_time;
          row[k] = g_settings.symbol + row[k];
        }
        else {
          row[k] = 'Unavailable';
        }
      }

      instances_data.push(row);
    }
  }
}

function change_cost(duration) {
  // update menu text
  var first = duration.charAt(0).toUpperCase();
  var text = first + duration.substr(1);
  $("#cost-dropdown .dropdown-toggle .text").text(text);

  // update selected menu option
  $('#cost-dropdown li a').each(function (i, e) {
    e = $(e);
    if (e.attr('duration') == duration) {
      e.parent().addClass('active');
    } else {
      e.parent().removeClass('active');
    }
  });

  var hour_multipliers = {
    "secondly": 1 / (60 * 60),
    "hourly": 1,
    "daily": 24,
    "weekly": (7 * 24),
    "monthly": (365 * 24 / 12),
    "annually": (365 * 24)
  };
  var multiplier = hour_multipliers[duration];
  multiplier = multiplier * g_settings.price;
  var per_time;

  generate_data_table(g_settings.region, multiplier, duration);
  
  g_data_table.clear();
  g_data_table.rows.add(instances_data);
  g_data_table.draw();

  g_settings.compare_on = false;
  update_compare_button();
  
  var $rows = $('#data tbody tr');

  $rows.unbind('click').click(function () {
    $(this).toggleClass('highlight');

    g_settings.compare_on = false;
    update_compare_button();
    maybe_update_url();
  });

  g_settings.cost_duration = duration;
  maybe_update_url();
}

function change_currency(currency, price, symbol) {
  g_settings.currency = currency;
  g_settings.price = Number(price);
  g_settings.symbol = symbol;

  var currency_name = null;
  $('#currency-dropdown li a').each(function (i, e) {
    e = $(e);
    if (e.data('currency') === currency) {
      e.parent().addClass('active');
      currency_name = e.data('symbol') + ' (' + e.data('currency') + ')';
    } else {
      e.parent().removeClass('active');
    }
  });
  $("#currency-dropdown .dropdown-toggle .text").text(currency_name);
  change_cost(g_settings.cost_duration);
}

function change_region(region) {
  g_settings.region = region;
  var region_name = null;
  $('#region-dropdown li a').each(function (i, e) {
    e = $(e);
    if (e.data('region') === region) {
      e.parent().addClass('active');
      region_name = e.text();
    } else {
      e.parent().removeClass('active');
    }
  });
  $("#region-dropdown .dropdown-toggle .text").text(region_name);
  
  change_cost(g_settings.cost_duration);

  g_data_table.clear();
  g_data_table.rows.add(instances_data);
  g_data_table.draw();

  g_settings.compare_on = false;
  update_compare_button();

  var $rows = $('#data tbody tr');

  $rows.unbind('click').click(function () {
    $(this).toggleClass('highlight');

    g_settings.compare_on = false;
    update_compare_button();
    maybe_update_url();
  });
}

function change_reserved_term(term) {
  g_settings.reserved_term = term;
  var $dropdown = $('#reserved-term-dropdown'),
    $activeLink = $dropdown.find('li a[data-reserved-term="' + term + '"]'),
    term_name = $activeLink.text();

  $dropdown.find('li').removeClass('active');
  $activeLink.closest('li').addClass('active');

  $dropdown.find('.dropdown-toggle .text').text(term_name);
  // 1change_cost(g_settings.cost_duration);
}

// Update all visible costs to the current duration.
// Called after new columns or rows are shown as their costs may be inaccurate.
function redraw_costs() {
  // 2change_cost(g_settings.cost_duration);
}

function setup_column_toggle() {
  $.each(g_data_table.columns().indexes(), function (i, idx) {
    var column = g_data_table.column(idx);
    $("#filter-dropdown ul").append(
      $('<li>')
        .toggleClass('active', column.visible())
        .append(
          $('<a>', {href: "javascript:;"})
            .text($(column.header()).text())
            .click(function (e) {
              toggle_column(i);
              $(this).parent().toggleClass("active");
              $(this).blur(); // prevent focus style from sticking in Firefox
              e.stopPropagation(); // keep dropdown menu open
            })
        )
    );
  });
}

function setup_clear() {
  $('.btn-clear').click(function () {
    // Reset app.
    g_settings = JSON.parse(JSON.stringify(g_settings_defaults)); // clone
    g_data_table.search("");
    clear_row_selections();
    maybe_update_url();
    store.clear();
    g_data_table.state.clear();
    window.location.reload();
  });
}

function clear_row_selections() {
  $('#data tbody tr').removeClass('highlight');
}

function url_for_selections() {
  var params = {
    min_memory: g_settings.min_memory,
    min_vcpus: g_settings.min_vcpus,
    min_storage: g_settings.min_storage,
    filter: g_data_table.settings()[0].oPreviousSearch['sSearch'],
    region: g_settings.region,
    cost_duration: g_settings.cost_duration,
    reserved_term: g_settings.reserved_term,
    compare_on: g_settings.compare_on
  };

  // avoid storing empty or default values in URL
  for (var key in params) {
    if (params[key] === '' || params[key] == null || params[key] === g_settings_defaults[key]) {
      delete params[key];
    }
  }

  // selected rows
  var selected_row_ids = $('#data tbody tr.highlight').map(function () {
    return this.id;
  }).get();
  if (selected_row_ids.length > 0) {
    params.selected = selected_row_ids;
  }

  var url = location.origin + location.pathname;
  var parameters = [];
  for (var setting in params) {
    if (params[setting] !== undefined) {
      parameters.push(setting + '=' + params[setting]);
    }
  }
  if (parameters.length > 0) {
    url = url + '?' + parameters.join('&');
  }
  return url;
}

function maybe_update_url() {
  // Save localstorage data as well
  store.set('ec2_settings', g_settings);

  if (!history.replaceState) {
    return;
  }

  try {
    var url = url_for_selections();
    if (document.location == url) {
      return;
    }

    history.replaceState(null, '', url);
  } catch (ex) {
    // doesn't matter
  }
}

var apply_min_values = function () {
  var all_filters = $('[data-action="datafilter"]');
  var data_rows = $('#data tr:has(td)');

  // data_rows.show();

  all_filters.each(function () {
    var filter_on = $(this).data('type');
    var filter_val = parseFloat($(this).val()) || 0;

    // update global variable for dynamic URL
    g_settings["min_" + filter_on] = filter_val;

    /* var match_fail = data_rows.filter(function () {
      var row_val;
      row_val = parseFloat(
        $(this).find('td[class~="' + filter_on + '"] span').attr('sort')
      );
      return row_val < filter_val;
    });

    match_fail.hide();*/
  });
  maybe_update_url();

  change_region(g_settings_defaults.region);
};

function on_data_table_initialized() {
  if (g_app_initialized) return;
  g_app_initialized = true;

  load_settings();

  // populate filter inputs
  $('[data-action="datafilter"][data-type="memory"]').val(g_settings['min_memory']);
  $('[data-action="datafilter"][data-type="vcpus"]').val(g_settings['min_vcpus']);
  $('[data-action="datafilter"][data-type="storage"]').val(g_settings['min_storage']);
  g_data_table.search(g_settings['filter']);
  apply_min_values();

  // apply highlight to selected rows
  $.each(g_settings.selected.split(','), function (_, id) {
    id = id.replace('.', '\\.');
    $('#' + id).addClass('highlight');
  });

  configure_highlighting();

  // Allow row filtering by min-value match.
  $('[data-action=datafilter]').on('keyup', apply_min_values);

  // change_region(g_settings.region);
  // change_cost(g_settings.cost_duration);
  // change_reserved_term(g_settings.reserved_term);

  $.extend($.fn.dataTableExt.oStdClasses, {
    "sWrapper": "dataTables_wrapper form-inline"
  });

  setup_column_toggle();

  setup_clear();

  // enable bootstrap tooltips
  $('abbr').tooltip({
    placement: function (tt, el) {
      return (this.$element.parents('thead').length) ? 'top' : 'right';
    }
  });

  $("#cost-dropdown li").bind("click", function (e) {
    change_cost(e.target.getAttribute("duration"));
  });

  $("#region-dropdown li").bind("click", function (e) {
    change_region($(e.target).data('region'));
  });

  $("#currency-dropdown li").bind("click", function (e) {
    change_currency($(e.target).data('currency'), $(e.target).data('price'), $(e.target).data('symbol'));
  });

  change_currency(g_settings.currency, g_settings.price, g_settings.symbol);

  $("#reserved-term-dropdown li").bind("click", function (e) {
    change_reserved_term($(e.target).data('reservedTerm'));
  });

  // apply classes to search box
  $('div.dataTables_filter input').addClass('form-control search');
}

// sorting for colums with more complex data
// http://datatables.net/plug-ins/sorting#hidden_title
jQuery.extend(jQuery.fn.dataTableExt.oSort, {
  "span-sort-pre": function (elem) {
    var matches = elem.match(/sort="(.*?)"/);
    if (matches) {
      return parseFloat(matches[1]);
    }
    return 0;
  },

  "span-sort-asc": function (a, b) {
    return ((a < b) ? -1 : ((a > b) ? 1 : 0));
  },

  "span-sort-desc": function (a, b) {
    return ((a < b) ? 1 : ((a > b) ? -1 : 0));
  },

  "cust-sort-pre": function (elem) {
    var parts = elem.split(" ");
    if (parts.length === 1) {
      return 1e6;
    }

    var res = parts[0].replace('$', '');

    return Number(res);
  },

  "cust-sort-asc": function (a, b) {
    return ((a < b) ? -1 : ((a > b) ? 1 : 0));
  },

  "cust-sort-desc": function (a, b) {
    return ((a < b) ? 1 : ((a > b) ? -1 : 0));
  },
});

// toggle columns
function toggle_column(col_index) {
  var is_visible = g_data_table.column(col_index).visible();
  g_data_table.column(col_index).visible(is_visible ? false : true);
  redraw_costs();
}

// retrieve all the parameters from the location string
function load_settings() {
  // load settings from local storage
  g_settings = store.get('ec2_settings') || {};

  if (location.search) {
    var params = location.search.slice(1).split('&');
    params.forEach(function (param) {
      var parts = param.split('=');
      var key = parts[0];
      var val = parts[1];
      // support legacy key names
      if (key == 'cost') {
        key = 'cost_duration';
      } else if (key == 'term') {
        key = 'reserved_term';
      }
      // store in global settings
      console.log('Loaded setting from URL:', key, '=', val);
      g_settings[key] = val;
    });
  }

  // use default settings for missing values
  for (var key in g_settings_defaults) {
    if (g_settings[key] === undefined) {
      g_settings[key] = g_settings_defaults[key];
    }
  }

  return g_settings;
}

function configure_highlighting() {
  var $compareBtn = $('.btn-compare'),
    $rows = $('#data tbody tr');

  // Allow row highlighting by clicking.
  $rows.unbind('click').click(function () {
    $(this).toggleClass('highlight');

    update_compare_button();
    maybe_update_url();
  });

  $compareBtn.click(function () {
    g_settings.compare_on = !g_settings.compare_on;
    update_compare_button();
    update_visible_rows();
    maybe_update_url();
  });

  update_compare_button();
  update_visible_rows();
}

function update_visible_rows() {
  var $rows = $('#data tbody tr');
  if (! g_settings.compare_on) {
    $rows.show();
  } else {
    $rows.filter(':not(.highlight)').hide();
  }
}

function update_compare_button() {
  var $compareBtn = $('.btn-compare'),
      $rows = $('#data tbody tr');

  if (! g_settings.compare_on) {
    $compareBtn.text($compareBtn.data('textOff'))
        .addClass('btn-primary')
        .removeClass('btn-success')
        .prop('disabled', !$rows.is('.highlight'));
  } else {
    $compareBtn.text($compareBtn.data('textOn'))
        .addClass('btn-success')
        .removeClass('btn-primary');
  }
}