src/src/platform/src/data/sync/CS.js

   1
   2 Ext.data.CS = Ext.extend(Object, { // Change Stamp
   3
   4         r: 0, // replica_number
   5         t: 0, // time, in seconds since the epoch
   6         s: 0, // sequence number
   7
   8         constructor: function(config) {
   9                 this.set(config);
  10         },
  11
  12         set: function(x) {
  13                 if (typeof x === 'string' || x instanceof String) {
  14                         this.from_s(x)
  15                 } else if (typeof x === 'object') {
  16                         this.r= x.r||0;
  17                         this.t= x.t||0;
  18                         this.s= x.s||0;
  19                 }
  20         },
  21
  22         changeReplicaNumber: function(old_replica_number,new_replica_number) {
  23                 if (this.r==old_replica_number) {
  24                         this.r= new_replica_number;
  25                         return true;
  26                 }
  27                 return false;
  28         },
  29
  30         greaterThan: function(x) { return this.compare(x)>0; },
  31         lessThan: function(x) { return this.compare(x)<0; },
  32         equals: function(x) { return this.compare(x)===0 },
  33         compare: function(x) {
  34                 var r= this.t-x.t
  35                 if (r==0) {
  36                         r= this.s-x.s;
  37                         if (r==0) {
  38                                 r= this.r-x.r
  39                         }
  40                 }
  41                 return r;
  42         },
  43
  44         from_s: function(t) {
  45     var m= t.match(/(\d+)-(\d+)-?(\d+)?/)
  46                 if (m && m.length>0) {
  47             this.r= parseInt(m[1])
  48             this.t= parseInt(m[2])
  49             this.s= m[3] ? parseInt(m[3]) : 0
  50                 } else {
  51                         throw "Error - CS - Bad change stamp '"+t+"'."
  52                 }
  53                 return this;
  54         },
  55
  56         to_s: function() {
  57                 return this.r+"-"+this.t+(this.s>0 ? "-"+this.s : "");
  58         }
  59
  60 });