Synnefo

// Copyright 2013 GRNET S.A. All rights reserved.

// 

// Redistribution and use in source and binary forms, with or

// without modification, are permitted provided that the following

// conditions are met:

// 

//   1. Redistributions of source code must retain the above

//      copyright notice, this list of conditions and the following

//      disclaimer.

// 

//   2. Redistributions in binary form must reproduce the above

//      copyright notice, this list of conditions and the following

//      disclaimer in the documentation and/or other materials

//      provided with the distribution.

// 

// THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS

// OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR

// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF

// USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED

// AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN

// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

// POSSIBILITY OF SUCH DAMAGE.

// 

// The views and conclusions contained in the software and

// documentation are those of the authors and should not be

// interpreted as representing official policies, either expressed

// or implied, of GRNET S.A.

// 

;(function(root){

    // Astakos quotas lib

    // Requires jquery and jquery.cookie javascript libs

    //

    // Usage

    // -----

    // <script src="jquery.js"></script>

    // <script src="backbone.js"></script>

    // <script src="snf/quota.js"></script>

    // 

    // var quotas = new snf.quota.Quota();

    // var quotas = new snf.quota.Quota();

    // $.ajax({

    //        url: '/userquota',

    //        async: false,

    //        method: 'POST',

    //        success: function(data) {

    //           quotas.load(data);

    //        }

    //    })

    //

    // var vms_limit = quotas.get_limit("cyclades.vm");

    // var networks_usage = quotas.get_usage("cyclades.network.private");

    //

    var root = root;

    var snf = root.synnefo = root.synnefo || {};

    var bb = root.Backbone;

    var _ = root._;

    // init quota namespace

    snf.quota = {};

    snf.quota.Quota = function(defaultns) {

        if (defaultns == undefined) { defaultns = "" }

        this.ns = defaultns;

        this.data = {};

    }

    _.extend(snf.quota.Quota.prototype, bb.Events, {

      load: function(resp) {

        this.data = {};

        _.each(resp, function(q) {

          if (this.data[q.name]) {

            _.extend(this.data[q.name], q)

          } else {

            this.data[q.name] = q;

          }

          q.maxValue = parseInt(q.maxValue);

          q.currValue = parseInt(q.currValue);

          this.update_exceeded(q.name, true);

        }, this);

      },

      get_key: function(key) {

        if (key.indexOf(".") == -1) {

          return this.ns + "." + key;

        }

        return key;

      },

      get: function(key) {

        if (this.get_key(key) in this.data) {

          return this.data[this.get_key(key)]

        }

        return {}

      },

      update_exceeded: function(key, silent) {

        if (silent === undefined) { silent = false; }

        var q = this.get(key);

        var oldexceeded = q.exceeded;

        q.exceeded = this.exceeded(key);

        if (q.exceeded != oldexceeded) {

          key = this.get_key(key);

          this.trigger("quota.changed", key, this);

          this.trigger(key + ".quota.changed", this);

          if (q.exceeded) { this.trigger("quota.reached", this)}

          if (!q.exceeded) { this.trigger("quota.free", this)}

          if (q.exceeded) { this.trigger(key + ".quota.reached", this)}

          if (!q.exceeded) { this.trigger(key + ".quota.free", this)}

        }

      },

      update_usage: function(key, value) {

        this.get(key).currValue = parseInt(value);

        this.update_exceeded(key);

      },

      update_limit: function(key, value) {

        this.get(key).maxValue = parseInt(value);

        this.update_exceeded(key);

      },

      get_usage: function(key) {

        return parseInt(this.get(key).currValue);

      },

      get_limit: function(key) {

        return parseInt(this.get(key).maxValue);

      },

      is_bytes: function(key) {

        return this.get(key).unit == "bytes";

      },

      get_available: function(key) {

        return this.get_limit(key) - this.get_usage(key)

      },

      exceeded: function(key) {

        return this.get_usage(key) >= this.get_limit(key);

      },

      can_consume: function(key, value) {

        return (this.get_available(key) - parseInt(value)) >= 0

      },

      get_available_readable: function(key) {

        var value;

        if (this.is_bytes(key)) {

          var value = this.get_available(key);

          if (!value) { return 0 }

          return snf.util.readablizeBytes(value);

        } else {

          return this.get_available(key);

        }

      }

    });

})(this);