Synnefo

;(function() {

// helper humanize methods

// https://github.com/taijinlee/humanize/blob/master/humanize.js 

humanize = {};

humanize.filesize = function(filesize, kilo, decimals, decPoint, thousandsSep) {

    kilo = (kilo === undefined) ? 1024 : kilo;

    decimals = isNaN(decimals) ? 2 : Math.abs(decimals);

    decPoint = (decPoint === undefined) ? '.' : decPoint;

    thousandsSep = (thousandsSep === undefined) ? ',' : thousandsSep;

    if (filesize <= 0) { return '0 bytes'; }

    var thresholds = [1];

    var units = ['bytes', 'KB', 'MB', 'GB', 'TB', 'PB'];

    if (filesize < kilo) { return humanize.numberFormat(filesize, 0) + ' ' + units[0]; }

    for (var i = 1; i < units.length; i++) {

      thresholds[i] = thresholds[i-1] * kilo;

      if (filesize < thresholds[i]) {

        return humanize.numberFormat(filesize / thresholds[i-1], decimals, decPoint, thousandsSep) + ' ' + units[i-1];

      }

    }

    // use the last unit if we drop out to here

    return humanize.numberFormat(filesize / thresholds[units.length - 1], decimals, decPoint, thousandsSep) + ' ' + units[units.length - 1];

};

humanize.numberFormat = function(number, decimals, decPoint, thousandsSep) {

    decimals = isNaN(decimals) ? 2 : Math.abs(decimals);

    decPoint = (decPoint === undefined) ? '.' : decPoint;

    thousandsSep = (thousandsSep === undefined) ? ',' : thousandsSep;

    var sign = number < 0 ? '-' : '';

    number = Math.abs(+number || 0);

    var intPart = parseInt(number.toFixed(decimals), 10) + '';

    var j = intPart.length > 3 ? intPart.length % 3 : 0;

    return sign + (j ? intPart.substr(0, j) + thousandsSep : '') + intPart.substr(j).replace(/(\d{3})(?=\d)/g, '$1' + thousandsSep) + (decimals ? decPoint + Math.abs(number - intPart).toFixed(decimals).slice(2) : '');

  };

DO_LOG = false

LOG = DO_LOG ? _.bind(console.log, console) : function() {};

WARN = DO_LOG ? _.bind(console.warn, console) : function() {};

var default_usage_cls_map = {

  0: 'green',

  33: 'yellow',

  66: 'red'

}

function UsageView(settings) {

  this.settings = settings;

  this.url = this.settings.url;

  this.container = $(this.settings.container);

  this.meta = this.settings.meta;

  this.groups = this.settings.groups;

  this.el = {};

  this.usage_cls_map = this.settings.usage_cls_map || default_usage_cls_map;

  this.initialize();

}

_.extend(UsageView.prototype, {

  tpls: {

      'main': '<div class="stats clearfix"><ul></ul></div>',

      'quotas': "#quotaTpl"

  },

  initialize: function() {

    LOG("Initializing UsageView", this.settings);

    this.initResources();

    // initial usage set ????

    this.quotas = {};

    if (this.settings.quotas && _.keys(this.settings.quotas).length > 0) {

      this.setQuotas(this.settings.quotas);

    }

    this.initLayout();

    this.updateQuotas();

  },

  $: function(selector) {

    return this.container;

  },

  render: function(tpl, params) {

    LOG("Rendering", tpl, params);

    var tpl = this.tpls[tpl];

    if (/^[#\.]/.exec(tpl)) { 

      tpl = $(tpl).html();

    }

    var rendered = Mustache.render(tpl, params);

    return $(rendered);

  },

  initLayout: function() {

    LOG("Initializing layout");

    this.el.main = this.render('main');

    this.container.append(this.el.main);

    var ul = this.container.find("ul");

    this.el.list = this.render('quotas', {

      'resources':this.resources_ordered

    });

    ul.append(this.el.list);

  },

  initResources: function() {

    var ordered = this.meta.resources_order;

    var resources = {};

    var resources_ordered = [];

    _.each(this.meta.resources, function(group, index) {

      _.each(group[1], function(resource, rindex) {

        var resource_index = ordered.length;

        if (!_.contains(ordered, resource.name)) {

          ordered.push(resource.name);

        } else {

          resource_index = ordered.indexOf(resource.name);

        }

        resource.index = resource_index;

        resource.resource_name = resource.name.split(".")[1];

        resources[resource.name] = resource;

      })

    });

    resources_ordered = _.map(ordered, function(rk) { return resources[rk] });

    this.resources = resources;

    this.resources_ordered = resources_ordered;

    LOG("Resources initialized", this.resources_ordered, this.resources);

  },

  updateLayout: function() {

    LOG("Updating layout", this.quotas);

    var self = this;

    _.each(this.quotas, function(value, key) {

      var usage = self.getUsage(key);

      var el = self.$().find("li[data-resource='"+key+"']");

      self.updateResourceElement(el, usage);

    })

  },

  updateResourceElement: function(el, usage) {

    el.find(".currValue").text(usage.curr);

    el.find(".maxValue").text(usage.max);

    el.find(".bar span").css({width:usage.perc+"%"});

    el.find(".bar .value").text(usage.perc+"%");

    var left = usage.label_left == 'auto' ? 

               usage.label_left : usage.label_left + "%";

    el.find(".bar .value").css({left:left});

    el.find(".bar .value").css({color:usage.label_color});

    el.removeClass("green yellow red");

    el.addClass(usage.cls);

  },

  getUsage: function(resource_name) {

    var resource = this.quotas[resource_name];

    var resource_meta = this.resources[resource_name];

    var value, limit, percentage; 

    limit = resource.limit;

    value = resource.usage;

    if (value < 0 ) { value = 0 }

    percentage = (value/limit) * 100;

    if (value == 0) { percentage = 0 }

    if (value > limit) {

      percentage = 100;

    }

    if (resource_meta.unit == 'bytes') {

      value = humanize.filesize(value);

      limit = humanize.filesize(limit);

    }

    var cls = 'green';

    _.each(this.usage_cls_map, function(ucls, u){

      if (percentage >= u) {

        cls = ucls

      }

    })

    var label_left = percentage >= 30 ? percentage - 17 : 'auto'; 

    var label_col = label_left == 'auto' ? 'inherit' : '#fff';

    percentage = humanize.numberFormat(percentage, 0);

    qdata = {'curr': value, 'max': limit, 'perc': percentage, 'cls': cls,

             'label_left': label_left, 'label_color': label_col}

    _.extend(qdata, resource);

    return qdata

  },

  setQuotas: function(data) {

    LOG("Set quotas", data);

    var self = this;

    this.quotas = data;

    _.each(this.quotas, function(v, k) {

      var r = self.resources[k];

      var usage = self.getUsage(k);

      r.usage = usage;

      self.resources[k].usage = usage;

      self.resources_ordered[r.index].usage = usage;

    });

  },

  _ajaxOptions: function() {

    var token = $.cookie(this.settings.cookie_name).split("|")[1];

    return {

      'url': this.url,

      'headers': {

        'X-Auth-Token': token

      },

    }

  },

  updateQuotas: function() {

    LOG("Updating quotas");

    var self = this;

    this.getQuotas(function(data){

      self.setQuotas(data.system);

      self.updateLayout();

    })

  },

  getQuotas: function(callback) {

    var options = this._ajaxOptions();

    options.success = callback;

    LOG("Calling quotas API", options);

    $.ajax(options);

  }

});

window.UsageView = UsageView;

})();