addons/point_of_sale/static/src/js/models.js

   1 function openerp_pos_models(instance, module){ //module is instance.point_of_sale
   2     var QWeb = instance.web.qweb;
   3         var _t = instance.web._t;
   4
   5     var round_di = instance.web.round_decimals;
   6     var round_pr = instance.web.round_precision
   7
   8     // The PosModel contains the Point Of Sale's representation of the backend.
   9     // Since the PoS must work in standalone ( Without connection to the server )
  10     // it must contains a representation of the server's PoS backend.
  11     // (taxes, product list, configuration options, etc.)  this representation
  12     // is fetched and stored by the PosModel at the initialisation.
  13     // this is done asynchronously, a ready deferred alows the GUI to wait interactively
  14     // for the loading to be completed
  15     // There is a single instance of the PosModel for each Front-End instance, it is usually called
  16     // 'pos' and is available to all widgets extending PosWidget.
  17
  18     module.PosModel = Backbone.Model.extend({
  19         initialize: function(session, attributes) {
  20             Backbone.Model.prototype.initialize.call(this, attributes);
  21             var  self = this;
  22             this.session = session;
  23             this.flush_mutex = new $.Mutex();                   // used to make sure the orders are sent to the server once at time
  24             this.pos_widget = attributes.pos_widget;
  25
  26             this.proxy = new module.ProxyDevice(this);              // used to communicate to the hardware devices via a local proxy
  27             this.barcode_reader = new module.BarcodeReader({'pos': this, proxy:this.proxy, patterns: {}});  // used to read barcodes
  28             this.proxy_queue = new module.JobQueue();           // used to prevent parallels communications to the proxy
  29             this.db = new module.PosDB();                       // a local database used to search trough products and categories & store pending orders
  30             this.debug = jQuery.deparam(jQuery.param.querystring()).debug !== undefined;    //debug mode
  31
  32             // Business data; loaded from the server at launch
  33             this.accounting_precision = 2; //TODO
  34             this.company_logo = null;
  35             this.company_logo_base64 = '';
  36             this.currency = null;
  37             this.shop = null;
  38             this.company = null;
  39             this.user = null;
  40             this.users = [];
  41             this.partners = [];
  42             this.cashier = null;
  43             this.cashregisters = [];
  44             this.bankstatements = [];
  45             this.taxes = [];
  46             this.pos_session = null;
  47             this.config = null;
  48             this.units = [];
  49             this.units_by_id = {};
  50             this.pricelist = null;
  51             this.order_sequence = 1;
  52             window.posmodel = this;
  53
  54             // these dynamic attributes can be watched for change by other models or widgets
  55             this.set({
  56                 'synch':            { state:'connected', pending:0 },
  57                 'orders':           new module.OrderCollection(),
  58                 'selectedOrder':    null,
  59             });
  60
  61             this.bind('change:synch',function(pos,synch){
  62                 clearTimeout(self.synch_timeout);
  63                 self.synch_timeout = setTimeout(function(){
  64                     if(synch.state !== 'disconnected' && synch.pending > 0){
  65                         self.set('synch',{state:'disconnected', pending:synch.pending});
  66                     }
  67                 },3000);
  68             });
  69
  70             this.get('orders').bind('remove', function(order,_unused_,options){
  71                 self.on_removed_order(order,options.index,options.reason);
  72             });
  73
  74             // We fetch the backend data on the server asynchronously. this is done only when the pos user interface is launched,
  75             // Any change on this data made on the server is thus not reflected on the point of sale until it is relaunched.
  76             // when all the data has loaded, we compute some stuff, and declare the Pos ready to be used.
  77             this.ready = this.load_server_data()
  78                 .then(function(){
  79                     if(self.config.use_proxy){
  80                         return self.connect_to_proxy();
  81                     }
  82                 });
  83
  84         },
  85
  86         // releases ressources holds by the model at the end of life of the posmodel
  87         destroy: function(){
  88             // FIXME, should wait for flushing, return a deferred to indicate successfull destruction
  89             // this.flush();
  90             this.proxy.close();
  91             this.barcode_reader.disconnect();
  92             this.barcode_reader.disconnect_from_proxy();
  93         },
  94         connect_to_proxy: function(){
  95             var self = this;
  96             var  done = new $.Deferred();
  97             this.barcode_reader.disconnect_from_proxy();
  98             this.pos_widget.loading_message(_t('Connecting to the PosBox'),0);
  99             this.pos_widget.loading_skip(function(){
 100                     self.proxy.stop_searching();
 101                 });
 102             this.proxy.autoconnect({
 103                     force_ip: self.config.proxy_ip || undefined,
 104                     progress: function(prog){
 105                         self.pos_widget.loading_progress(prog);
 106                     },
 107                 }).then(function(){
 108                     if(self.config.iface_scan_via_proxy){
 109                         self.barcode_reader.connect_to_proxy();
 110                     }
 111                 }).always(function(){
 112                     done.resolve();
 113                 });
 114             return done;
 115         },
 116
 117         // helper function to load data from the server. Obsolete use the models loader below.
 118         fetch: function(model, fields, domain, ctx){
 119             this._load_progress = (this._load_progress || 0) + 0.05;
 120             this.pos_widget.loading_message(_t('Loading')+' '+model,this._load_progress);
 121             return new instance.web.Model(model).query(fields).filter(domain).context(ctx).all()
 122         },
 123
 124         // Server side model loaders. This is the list of the models that need to be loaded from
 125         // the server. The models are loaded one by one by this list's order. The 'loaded' callback
 126         // is used to store the data in the appropriate place once it has been loaded. This callback
 127         // can return a deferred that will pause the loading of the next module.
 128         // a shared temporary dictionary is available for loaders to communicate private variables
 129         // used during loading such as object ids, etc.
 130         models: [
 131         {
 132             model:  'res.users',
 133             fields: ['name','company_id'],
 134             domain: function(self){ return [['id','=',self.session.uid]]; },
 135             loaded: function(self,users){ self.user = users[0]; },
 136         },{
 137             model:  'res.company',
 138             fields: [ 'currency_id', 'email', 'website', 'company_registry', 'vat', 'name', 'phone', 'partner_id' , 'country_id'],
 139             domain: function(self){ return [['id','=',self.user.company_id[0]]]; },
 140             loaded: function(self,companies){ self.company = companies[0]; },
 141         },{
 142             model:  'product.uom',
 143             fields: [],
 144             domain: null,
 145             loaded: function(self,units){
 146                 self.units = units;
 147                 var units_by_id = {};
 148                 for(var i = 0, len = units.length; i < len; i++){
 149                     units_by_id[units[i].id] = units[i];
 150                     units[i].groupable = ( units[i].category_id[0] === 1 );
 151                     units[i].is_unit   = ( units[i].id === 1 );
 152                 }
 153                 self.units_by_id = units_by_id;
 154             }
 155         },{
 156             model:  'res.users',
 157             fields: ['name','ean13'],
 158             domain: null,
 159             loaded: function(self,users){ self.users = users; },
 160         },{
 161             model:  'res.partner',
 162             fields: ['name','street','city','state_id','country_id','vat','phone','zip','mobile','email','ean13','write_date'],
 163             domain: null,
 164             loaded: function(self,partners){
 165                 self.partners = partners;
 166                 self.db.add_partners(partners);
 167             },
 168         },{
 169             model:  'res.country',
 170             fields: ['name'],
 171             loaded: function(self,countries){
 172                 self.countries = countries;
 173                 self.company.country = null;
 174                 for (var i = 0; i < countries.length; i++) {
 175                     if (countries[i].id === self.company.country_id[0]){
 176                         self.company.country = countries[i];
 177                     }
 178                 }
 179             },
 180         },{
 181             model:  'account.tax',
 182             fields: ['name','amount', 'price_include', 'type'],
 183             domain: null,
 184             loaded: function(self,taxes){ self.taxes = taxes; },
 185         },{
 186             model:  'pos.session',
 187             fields: ['id', 'journal_ids','name','user_id','config_id','start_at','stop_at','sequence_number','login_number'],
 188             domain: function(self){ return [['state','=','opened'],['user_id','=',self.session.uid]]; },
 189             loaded: function(self,pos_sessions){
 190                 self.pos_session = pos_sessions[0];
 191
 192                 var orders = self.db.get_orders();
 193                 for (var i = 0; i < orders.length; i++) {
 194                     self.pos_session.sequence_number = Math.max(self.pos_session.sequence_number, orders[i].data.sequence_number+1);
 195                 }
 196             },
 197         },{
 198             model: 'pos.config',
 199             fields: [],
 200             domain: function(self){ return [['id','=', self.pos_session.config_id[0]]]; },
 201             loaded: function(self,configs){
 202                 self.config = configs[0];
 203                 self.config.use_proxy = self.config.iface_payment_terminal ||
 204                                         self.config.iface_electronic_scale ||
 205                                         self.config.iface_print_via_proxy  ||
 206                                         self.config.iface_scan_via_proxy   ||
 207                                         self.config.iface_cashdrawer;
 208
 209                 self.barcode_reader.add_barcode_patterns({
 210                     'product':  self.config.barcode_product,
 211                     'cashier':  self.config.barcode_cashier,
 212                     'client':   self.config.barcode_customer,
 213                     'weight':   self.config.barcode_weight,
 214                     'discount': self.config.barcode_discount,
 215                     'price':    self.config.barcode_price,
 216                 });
 217
 218                 if (self.config.company_id[0] !== self.user.company_id[0]) {
 219                     throw new Error(_t("Error: The Point of Sale User must belong to the same company as the Point of Sale. You are probably trying to load the point of sale as an administrator in a multi-company setup, with the administrator account set to the wrong company."));
 220                 }
 221             },
 222         },{
 223             model: 'stock.location',
 224             fields: [],
 225             domain: function(self){ return [['id','=', self.config.stock_location_id[0]]]; },
 226             loaded: function(self, locations){ self.shop = locations[0]; },
 227         },{
 228             model:  'product.pricelist',
 229             fields: ['currency_id'],
 230             domain: function(self){ return [['id','=',self.config.pricelist_id[0]]]; },
 231             loaded: function(self, pricelists){ self.pricelist = pricelists[0]; },
 232         },{
 233             model: 'res.currency',
 234             fields: ['symbol','position','rounding','accuracy'],
 235             domain: function(self){ return [['id','=',self.pricelist.currency_id[0]]]; },
 236             loaded: function(self, currencies){
 237                 self.currency = currencies[0];
 238             },
 239         },{
 240             model: 'product.packaging',
 241             fields: ['ean','product_tmpl_id'],
 242             domain: null,
 243             loaded: function(self, packagings){
 244                 self.db.add_packagings(packagings);
 245             },
 246         },{
 247             model:  'pos.category',
 248             fields: ['id','name','parent_id','child_id','image'],
 249             domain: null,
 250             loaded: function(self, categories){
 251                 self.db.add_categories(categories);
 252             },
 253         },{
 254             model:  'product.product',
 255             fields: ['display_name', 'list_price','price','pos_categ_id', 'taxes_id', 'ean13', 'default_code',
 256                      'to_weight', 'uom_id', 'uos_id', 'uos_coeff', 'mes_type', 'description_sale', 'description',
 257                      'product_tmpl_id'],
 258             domain:  function(self){ return [['sale_ok','=',true],['available_in_pos','=',true]]; },
 259             context: function(self){ return { pricelist: self.pricelist.id, display_default_code: false }; },
 260             loaded: function(self, products){
 261                 self.db.add_products(products);
 262             },
 263         },{
 264             model:  'account.bank.statement',
 265             fields: ['account_id','currency','journal_id','state','name','user_id','pos_session_id'],
 266             domain: function(self){ return [['state', '=', 'open'],['pos_session_id', '=', self.pos_session.id]]; },
 267             loaded: function(self, bankstatements, tmp){
 268                 self.bankstatements = bankstatements;
 269
 270                 tmp.journals = [];
 271                 _.each(bankstatements,function(statement){
 272                     tmp.journals.push(statement.journal_id[0]);
 273                 });
 274             },
 275         },{
 276             model:  'account.journal',
 277             fields: [],
 278             domain: function(self,tmp){ return [['id','in',tmp.journals]]; },
 279             loaded: function(self, journals){
 280                 self.journals = journals;
 281
 282                 // associate the bank statements with their journals.
 283                 var bankstatements = self.bankstatements;
 284                 for(var i = 0, ilen = bankstatements.length; i < ilen; i++){
 285                     for(var j = 0, jlen = journals.length; j < jlen; j++){
 286                         if(bankstatements[i].journal_id[0] === journals[j].id){
 287                             bankstatements[i].journal = journals[j];
 288                         }
 289                     }
 290                 }
 291                 self.cashregisters = bankstatements;
 292             },
 293         },{
 294             label: 'fonts',
 295             loaded: function(self){
 296                 var fonts_loaded = new $.Deferred();
 297
 298                 // Waiting for fonts to be loaded to prevent receipt printing
 299                 // from printing empty receipt while loading Inconsolata
 300                 // ( The font used for the receipt )
 301                 waitForWebfonts(['Lato','Inconsolata'], function(){
 302                     fonts_loaded.resolve();
 303                 });
 304
 305                 // The JS used to detect font loading is not 100% robust, so
 306                 // do not wait more than 5sec
 307                 setTimeout(function(){
 308                     fonts_loaded.resolve();
 309                 },5000);
 310
 311                 return fonts_loaded;
 312             },
 313         },{
 314             label: 'pictures',
 315             loaded: function(self){
 316                 self.company_logo = new Image();
 317                 var  logo_loaded = new $.Deferred();
 318                 self.company_logo.onload = function(){
 319                     var img = self.company_logo;
 320                     var ratio = 1;
 321                     var targetwidth = 300;
 322                     var maxheight = 150;
 323                     if( img.width !== targetwidth ){
 324                         ratio = targetwidth / img.width;
 325                     }
 326                     if( img.height * ratio > maxheight ){
 327                         ratio = maxheight / img.height;
 328                     }
 329                     var width  = Math.floor(img.width * ratio);
 330                     var height = Math.floor(img.height * ratio);
 331                     var c = document.createElement('canvas');
 332                         c.width  = width;
 333                         c.height = height
 334                     var ctx = c.getContext('2d');
 335                         ctx.drawImage(self.company_logo,0,0, width, height);
 336
 337                     self.company_logo_base64 = c.toDataURL();
 338                     logo_loaded.resolve();
 339                 };
 340                 self.company_logo.onerror = function(){
 341                     logo_loaded.reject();
 342                 };
 343                     self.company_logo.crossOrigin = "anonymous";
 344                 self.company_logo.src = '/web/binary/company_logo' +'?_'+Math.random();
 345
 346                 return logo_loaded;
 347             },
 348         },
 349         ],
 350
 351         // loads all the needed data on the sever. returns a deferred indicating when all the data has loaded.
 352         load_server_data: function(){
 353             var self = this;
 354             var loaded = new $.Deferred();
 355             var progress = 0;
 356             var progress_step = 1.0 / self.models.length;
 357             var tmp = {}; // this is used to share a temporary state between models loaders
 358
 359             function load_model(index){
 360                 if(index >= self.models.length){
 361                     loaded.resolve();
 362                 }else{
 363                     var model = self.models[index];
 364                     self.pos_widget.loading_message(_t('Loading')+' '+(model.label || model.model || ''), progress);
 365                     var fields =  typeof model.fields === 'function'  ? model.fields(self,tmp)  : model.fields;
 366                     var domain =  typeof model.domain === 'function'  ? model.domain(self,tmp)  : model.domain;
 367                     var context = typeof model.context === 'function' ? model.context(self,tmp) : model.context;
 368                     progress += progress_step;
 369
 370                     if( model.model ){
 371                         new instance.web.Model(model.model).query(fields).filter(domain).context(context).all()
 372                             .then(function(result){
 373                                 try{    // catching exceptions in model.loaded(...)
 374                                     $.when(model.loaded(self,result,tmp))
 375                                         .then(function(){ load_model(index + 1); },
 376                                               function(err){ loaded.reject(err); });
 377                                 }catch(err){
 378                                     loaded.reject(err);
 379                                 }
 380                             },function(err){
 381                                 loaded.reject(err);
 382                             });
 383                     }else if( model.loaded ){
 384                         try{    // catching exceptions in model.loaded(...)
 385                             $.when(model.loaded(self,tmp))
 386                                 .then(  function(){ load_model(index +1); },
 387                                         function(err){ loaded.reject(err); });
 388                         }catch(err){
 389                             loaded.reject(err);
 390                         }
 391                     }else{
 392                         load_model(index + 1);
 393                     }
 394                 }
 395             }
 396
 397             try{
 398                 load_model(0);
 399             }catch(err){
 400                 loaded.reject(err);
 401             }
 402
 403             return loaded;
 404         },
 405
 406         // reload the list of partner, returns as a deferred that resolves if there were
 407         // updated partners, and fails if not
 408         load_new_partners: function(){
 409             var self = this;
 410             var def  = new $.Deferred();
 411             var fields = _.find(this.models,function(model){ return model.model === 'res.partner'; }).fields;
 412             new instance.web.Model('res.partner')
 413                 .query(fields)
 414                 .filter([['write_date','>',this.db.get_partner_write_date()]])
 415                 .all({'timeout':3000, 'shadow': true})
 416                 .then(function(partners){
 417                     if (self.db.add_partners(partners)) {   // check if the partners we got were real updates
 418                         def.resolve();
 419                     } else {
 420                         def.reject();
 421                     }
 422                 }, function(){ def.reject(); });
 423             return def;
 424         },
 425
 426         // this is called when an order is removed from the order collection. It ensures that there is always an existing
 427         // order and a valid selected order
 428         on_removed_order: function(removed_order,index,reason){
 429             if( (reason === 'abandon' || removed_order.temporary) && this.get('orders').size() > 0){
 430                 // when we intentionally remove an unfinished order, and there is another existing one
 431                 this.set({'selectedOrder' : this.get('orders').at(index) || this.get('orders').last()});
 432             }else{
 433                 // when the order was automatically removed after completion,
 434                 // or when we intentionally delete the only concurrent order
 435                 this.add_new_order();
 436             }
 437         },
 438
 439         //creates a new empty order and sets it as the current order
 440         add_new_order: function(){
 441             var order = new module.Order({pos:this});
 442             this.get('orders').add(order);
 443             this.set('selectedOrder', order);
 444         },
 445
 446         get_order: function(){
 447             return this.get('selectedOrder');
 448         },
 449
 450         //removes the current order
 451         delete_current_order: function(){
 452             this.get('selectedOrder').destroy({'reason':'abandon'});
 453         },
 454
 455         // saves the order locally and try to send it to the backend.
 456         // it returns a deferred that succeeds after having tried to send the order and all the other pending orders.
 457         push_order: function(order) {
 458             var self = this;
 459
 460             if(order){
 461                 this.proxy.log('push_order',order.export_as_JSON());
 462                 this.db.add_order(order.export_as_JSON());
 463             }
 464
 465             var pushed = new $.Deferred();
 466
 467             this.flush_mutex.exec(function(){
 468                 var flushed = self._flush_orders(self.db.get_orders());
 469
 470                 flushed.always(function(ids){
 471                     pushed.resolve();
 472                 });
 473             });
 474             return pushed;
 475         },
 476
 477         // saves the order locally and try to send it to the backend and make an invoice
 478         // returns a deferred that succeeds when the order has been posted and successfully generated
 479         // an invoice. This method can fail in various ways:
 480         // error-no-client: the order must have an associated partner_id. You can retry to make an invoice once
 481         //     this error is solved
 482         // error-transfer: there was a connection error during the transfer. You can retry to make the invoice once
 483         //     the network connection is up
 484
 485         push_and_invoice_order: function(order){
 486             var self = this;
 487             var invoiced = new $.Deferred();
 488
 489             if(!order.get_client()){
 490                 invoiced.reject('error-no-client');
 491                 return invoiced;
 492             }
 493
 494             var order_id = this.db.add_order(order.export_as_JSON());
 495
 496             this.flush_mutex.exec(function(){
 497                 var done = new $.Deferred(); // holds the mutex
 498
 499                 // send the order to the server
 500                 // we have a 30 seconds timeout on this push.
 501                 // FIXME: if the server takes more than 30 seconds to accept the order,
 502                 // the client will believe it wasn't successfully sent, and very bad
 503                 // things will happen as a duplicate will be sent next time
 504                 // so we must make sure the server detects and ignores duplicated orders
 505
 506                 var transfer = self._flush_orders([self.db.get_order(order_id)], {timeout:30000, to_invoice:true});
 507
 508                 transfer.fail(function(){
 509                     invoiced.reject('error-transfer');
 510                     done.reject();
 511                 });
 512
 513                 // on success, get the order id generated by the server
 514                 transfer.pipe(function(order_server_id){
 515
 516                     // generate the pdf and download it
 517                     self.pos_widget.do_action('point_of_sale.pos_invoice_report',{additional_context:{
 518                         active_ids:order_server_id,
 519                     }});
 520
 521                     invoiced.resolve();
 522                     done.resolve();
 523                 });
 524
 525                 return done;
 526
 527             });
 528
 529             return invoiced;
 530         },
 531
 532         // wrapper around the _save_to_server that updates the synch status widget
 533         _flush_orders: function(orders, options) {
 534             var self = this;
 535
 536             this.set('synch',{ state: 'connecting', pending: orders.length});
 537
 538             return self._save_to_server(orders, options).done(function (server_ids) {
 539                 var pending = self.db.get_orders().length;
 540
 541                 self.set('synch', {
 542                     state: pending ? 'connecting' : 'connected',
 543                     pending: pending
 544                 });
 545
 546                 return server_ids;
 547             });
 548         },
 549
 550         // send an array of orders to the server
 551         // available options:
 552         // - timeout: timeout for the rpc call in ms
 553         // returns a deferred that resolves with the list of
 554         // server generated ids for the sent orders
 555         _save_to_server: function (orders, options) {
 556             if (!orders || !orders.length) {
 557                 var result = $.Deferred();
 558                 result.resolve([]);
 559                 return result;
 560             }
 561
 562             options = options || {};
 563
 564             var self = this;
 565             var timeout = typeof options.timeout === 'number' ? options.timeout : 7500 * orders.length;
 566
 567             // we try to send the order. shadow prevents a spinner if it takes too long. (unless we are sending an invoice,
 568             // then we want to notify the user that we are waiting on something )
 569             var posOrderModel = new instance.web.Model('pos.order');
 570             return posOrderModel.call('create_from_ui',
 571                 [_.map(orders, function (order) {
 572                     order.to_invoice = options.to_invoice || false;
 573                     return order;
 574                 })],
 575                 undefined,
 576                 {
 577                     shadow: !options.to_invoice,
 578                     timeout: timeout
 579                 }
 580             ).then(function (server_ids) {
 581                 _.each(orders, function (order) {
 582                     self.db.remove_order(order.id);
 583                 });
 584                 return server_ids;
 585             }).fail(function (error, event){
 586                 if(error.code === 200 ){    // Business Logic Error, not a connection problem
 587                     self.pos_widget.screen_selector.show_popup('error-traceback',{
 588                         message: error.data.message,
 589                         comment: error.data.debug
 590                     });
 591                 }
 592                 // prevent an error popup creation by the rpc failure
 593                 // we want the failure to be silent as we send the orders in the background
 594                 event.preventDefault();
 595                 console.error('Failed to send orders:', orders);
 596             });
 597         },
 598
 599         scan_product: function(parsed_code){
 600             var self = this;
 601             var selectedOrder = this.get('selectedOrder');
 602             if(parsed_code.encoding === 'ean13'){
 603                 var product = this.db.get_product_by_ean13(parsed_code.base_code);
 604             }else if(parsed_code.encoding === 'reference'){
 605                 var product = this.db.get_product_by_reference(parsed_code.code);
 606             }
 607
 608             if(!product){
 609                 return false;
 610             }
 611
 612             if(parsed_code.type === 'price'){
 613                 selectedOrder.addProduct(product, {price:parsed_code.value});
 614             }else if(parsed_code.type === 'weight'){
 615                 selectedOrder.addProduct(product, {quantity:parsed_code.value, merge:false});
 616             }else if(parsed_code.type === 'discount'){
 617                 selectedOrder.addProduct(product, {discount:parsed_code.value, merge:false});
 618             }else{
 619                 selectedOrder.addProduct(product);
 620             }
 621             return true;
 622         },
 623     });
 624
 625     var orderline_id = 1;
 626
 627     // An orderline represent one element of the content of a client's shopping cart.
 628     // An orderline contains a product, its quantity, its price, discount. etc.
 629     // An Order contains zero or more Orderlines.
 630     module.Orderline = Backbone.Model.extend({
 631         initialize: function(attr,options){
 632             this.pos = options.pos;
 633             this.order = options.order;
 634             this.product = options.product;
 635             this.price   = options.product.price;
 636             this.quantity = 1;
 637             this.quantityStr = '1';
 638             this.discount = 0;
 639             this.discountStr = '0';
 640             this.type = 'unit';
 641             this.selected = false;
 642             this.id       = orderline_id++;
 643         },
 644         clone: function(){
 645             var orderline = new module.Orderline({},{
 646                 pos: this.pos,
 647                 order: null,
 648                 product: this.product,
 649                 price: this.price,
 650             });
 651             orderline.quantity = this.quantity;
 652             orderline.quantityStr = this.quantityStr;
 653             orderline.discount = this.discount;
 654             orderline.type = this.type;
 655             orderline.selected = false;
 656             return orderline;
 657         },
 658         // sets a discount [0,100]%
 659         set_discount: function(discount){
 660             var disc = Math.min(Math.max(parseFloat(discount) || 0, 0),100);
 661             this.discount = disc;
 662             this.discountStr = '' + disc;
 663             this.trigger('change',this);
 664         },
 665         // returns the discount [0,100]%
 666         get_discount: function(){
 667             return this.discount;
 668         },
 669         get_discount_str: function(){
 670             return this.discountStr;
 671         },
 672         get_product_type: function(){
 673             return this.type;
 674         },
 675         // sets the quantity of the product. The quantity will be rounded according to the
 676         // product's unity of measure properties. Quantities greater than zero will not get
 677         // rounded to zero
 678         set_quantity: function(quantity){
 679             if(quantity === 'remove'){
 680                 this.order.removeOrderline(this);
 681                 return;
 682             }else{
 683                 var quant = parseFloat(quantity) || 0;
 684                 var unit = this.get_unit();
 685                 if(unit){
 686                     this.quantity    = round_pr(quant, unit.rounding);
 687                     this.quantityStr = this.quantity.toFixed(Math.ceil(Math.log(1.0 / unit.rounding) / Math.log(10)));
 688                 }else{
 689                     this.quantity    = quant;
 690                     this.quantityStr = '' + this.quantity;
 691                 }
 692             }
 693             this.trigger('change',this);
 694         },
 695         // return the quantity of product
 696         get_quantity: function(){
 697             return this.quantity;
 698         },
 699         get_quantity_str: function(){
 700             return this.quantityStr;
 701         },
 702         get_quantity_str_with_unit: function(){
 703             var unit = this.get_unit();
 704             if(unit && !unit.is_unit){
 705                 return this.quantityStr + ' ' + unit.name;
 706             }else{
 707                 return this.quantityStr;
 708             }
 709         },
 710         // return the unit of measure of the product
 711         get_unit: function(){
 712             var unit_id = (this.product.uos_id || this.product.uom_id);
 713             if(!unit_id){
 714                 return undefined;
 715             }
 716             unit_id = unit_id[0];
 717             if(!this.pos){
 718                 return undefined;
 719             }
 720             return this.pos.units_by_id[unit_id];
 721         },
 722         // return the product of this orderline
 723         get_product: function(){
 724             return this.product;
 725         },
 726         // selects or deselects this orderline
 727         set_selected: function(selected){
 728             this.selected = selected;
 729             this.trigger('change',this);
 730         },
 731         // returns true if this orderline is selected
 732         is_selected: function(){
 733             return this.selected;
 734         },
 735         // when we add an new orderline we want to merge it with the last line to see reduce the number of items
 736         // in the orderline. This returns true if it makes sense to merge the two
 737         can_be_merged_with: function(orderline){
 738             if( this.get_product().id !== orderline.get_product().id){    //only orderline of the same product can be merged
 739                 return false;
 740             }else if(!this.get_unit() || !this.get_unit().groupable){
 741                 return false;
 742             }else if(this.get_product_type() !== orderline.get_product_type()){
 743                 return false;
 744             }else if(this.get_discount() > 0){             // we don't merge discounted orderlines
 745                 return false;
 746             }else if(this.price !== orderline.price){
 747                 return false;
 748             }else{
 749                 return true;
 750             }
 751         },
 752         merge: function(orderline){
 753             this.set_quantity(this.get_quantity() + orderline.get_quantity());
 754         },
 755         export_as_JSON: function() {
 756             return {
 757                 qty: this.get_quantity(),
 758                 price_unit: this.get_unit_price(),
 759                 discount: this.get_discount(),
 760                 product_id: this.get_product().id,
 761             };
 762         },
 763         //used to create a json of the ticket, to be sent to the printer
 764         export_for_printing: function(){
 765             return {
 766                 quantity:           this.get_quantity(),
 767                 unit_name:          this.get_unit().name,
 768                 price:              this.get_unit_price(),
 769                 discount:           this.get_discount(),
 770                 product_name:       this.get_product().display_name,
 771                 price_display :     this.get_display_price(),
 772                 price_with_tax :    this.get_price_with_tax(),
 773                 price_without_tax:  this.get_price_without_tax(),
 774                 tax:                this.get_tax(),
 775                 product_description:      this.get_product().description,
 776                 product_description_sale: this.get_product().description_sale,
 777             };
 778         },
 779         // changes the base price of the product for this orderline
 780         set_unit_price: function(price){
 781             this.price = round_di(parseFloat(price) || 0, 2);
 782             this.trigger('change',this);
 783         },
 784         get_unit_price: function(){
 785             var rounding = this.pos.currency.rounding;
 786             return round_pr(this.price,rounding);
 787         },
 788         get_display_price: function(){
 789             var rounding = this.pos.currency.rounding;
 790             return  round_pr(round_pr(this.get_unit_price() * this.get_quantity(),rounding) * (1- this.get_discount()/100.0),rounding);
 791         },
 792         get_price_without_tax: function(){
 793             return this.get_all_prices().priceWithoutTax;
 794         },
 795         get_price_with_tax: function(){
 796             return this.get_all_prices().priceWithTax;
 797         },
 798         get_tax: function(){
 799             return this.get_all_prices().tax;
 800         },
 801         get_tax_details: function(){
 802             return this.get_all_prices().taxDetails;
 803         },
 804         get_all_prices: function(){
 805             var self = this;
 806             var currency_rounding = this.pos.currency.rounding;
 807             var base = round_pr(this.get_quantity() * this.get_unit_price() * (1.0 - (this.get_discount() / 100.0)), currency_rounding);
 808             var totalTax = base;
 809             var totalNoTax = base;
 810
 811             var product =  this.get_product();
 812             var taxes_ids = product.taxes_id;
 813             var taxes =  self.pos.taxes;
 814             var taxtotal = 0;
 815             var taxdetail = {};
 816             _.each(taxes_ids, function(el) {
 817                 var tax = _.detect(taxes, function(t) {return t.id === el;});
 818                 if (tax.price_include) {
 819                     var tmp;
 820                     if (tax.type === "percent") {
 821                         tmp =  base - round_pr(base / (1 + tax.amount),currency_rounding);
 822                     } else if (tax.type === "fixed") {
 823                         tmp = round_pr(tax.amount * self.get_quantity(),currency_rounding);
 824                     } else {
 825                         throw "This type of tax is not supported by the point of sale: " + tax.type;
 826                     }
 827                     tmp = round_pr(tmp,currency_rounding);
 828                     taxtotal += tmp;
 829                     totalNoTax -= tmp;
 830                     taxdetail[tax.id] = tmp;
 831                 } else {
 832                     var tmp;
 833                     if (tax.type === "percent") {
 834                         tmp = tax.amount * base;
 835                     } else if (tax.type === "fixed") {
 836                         tmp = tax.amount * self.get_quantity();
 837                     } else {
 838                         throw "This type of tax is not supported by the point of sale: " + tax.type;
 839                     }
 840                     tmp = round_pr(tmp,currency_rounding);
 841                     taxtotal += tmp;
 842                     totalTax += tmp;
 843                     taxdetail[tax.id] = tmp;
 844                 }
 845             });
 846             return {
 847                 "priceWithTax": totalTax,
 848                 "priceWithoutTax": totalNoTax,
 849                 "tax": taxtotal,
 850                 "taxDetails": taxdetail,
 851             };
 852         },
 853     });
 854
 855     module.OrderlineCollection = Backbone.Collection.extend({
 856         model: module.Orderline,
 857     });
 858
 859     // Every Paymentline contains a cashregister and an amount of money.
 860     module.Paymentline = Backbone.Model.extend({
 861         initialize: function(attributes, options) {
 862             this.amount = 0;
 863             this.cashregister = options.cashregister;
 864             this.name = this.cashregister.journal_id[1];
 865             this.selected = false;
 866         },
 867         //sets the amount of money on this payment line
 868         set_amount: function(value){
 869             this.amount = round_di(parseFloat(value) || 0, 2);
 870             this.trigger('change:amount',this);
 871         },
 872         // returns the amount of money on this paymentline
 873         get_amount: function(){
 874             return this.amount;
 875         },
 876         set_selected: function(selected){
 877             if(this.selected !== selected){
 878                 this.selected = selected;
 879                 this.trigger('change:selected',this);
 880             }
 881         },
 882         // returns the associated cashregister
 883         //exports as JSON for server communication
 884         export_as_JSON: function(){
 885             return {
 886                 name: instance.web.datetime_to_str(new Date()),
 887                 statement_id: this.cashregister.id,
 888                 account_id: this.cashregister.account_id[0],
 889                 journal_id: this.cashregister.journal_id[0],
 890                 amount: this.get_amount()
 891             };
 892         },
 893         //exports as JSON for receipt printing
 894         export_for_printing: function(){
 895             return {
 896                 amount: this.get_amount(),
 897                 journal: this.cashregister.journal_id[1],
 898             };
 899         },
 900     });
 901
 902     module.PaymentlineCollection = Backbone.Collection.extend({
 903         model: module.Paymentline,
 904     });
 905
 906
 907     // An order more or less represents the content of a client's shopping cart (the OrderLines)
 908     // plus the associated payment information (the Paymentlines)
 909     // there is always an active ('selected') order in the Pos, a new one is created
 910     // automaticaly once an order is completed and sent to the server.
 911     module.Order = Backbone.Model.extend({
 912         initialize: function(attributes){
 913             Backbone.Model.prototype.initialize.apply(this, arguments);
 914             this.pos = attributes.pos;
 915             this.sequence_number = this.pos.pos_session.sequence_number++;
 916             this.uid =     this.generateUniqueId();
 917             this.set({
 918                 creationDate:   new Date(),
 919                 orderLines:     new module.OrderlineCollection(),
 920                 paymentLines:   new module.PaymentlineCollection(),
 921                 name:           _t("Order ") + this.uid,
 922                 client:         null,
 923             });
 924             this.selected_orderline   = undefined;
 925             this.selected_paymentline = undefined;
 926             this.screen_data = {};  // see ScreenSelector
 927             this.receipt_type = 'receipt';  // 'receipt' || 'invoice'
 928             this.temporary = attributes.temporary || false;
 929             return this;
 930         },
 931         is_empty: function(){
 932             return (this.get('orderLines').models.length === 0);
 933         },
 934         // Generates a public identification number for the order.
 935         // The generated number must be unique and sequential. They are made 12 digit long
 936         // to fit into EAN-13 barcodes, should it be needed
 937         generateUniqueId: function() {
 938             function zero_pad(num,size){
 939                 var s = ""+num;
 940                 while (s.length < size) {
 941                     s = "0" + s;
 942                 }
 943                 return s;
 944             }
 945             return zero_pad(this.pos.pos_session.id,5) +'-'+
 946                    zero_pad(this.pos.pos_session.login_number,3) +'-'+
 947                    zero_pad(this.sequence_number,4);
 948         },
 949         addOrderline: function(line){
 950             if(line.order){
 951                 order.removeOrderline(line);
 952             }
 953             line.order = this;
 954             this.get('orderLines').add(line);
 955             this.selectLine(this.getLastOrderline());
 956         },
 957         addProduct: function(product, options){
 958             options = options || {};
 959             var attr = JSON.parse(JSON.stringify(product));
 960             attr.pos = this.pos;
 961             attr.order = this;
 962             var line = new module.Orderline({}, {pos: this.pos, order: this, product: product});
 963
 964             if(options.quantity !== undefined){
 965                 line.set_quantity(options.quantity);
 966             }
 967             if(options.price !== undefined){
 968                 line.set_unit_price(options.price);
 969             }
 970             if(options.discount !== undefined){
 971                 line.set_discount(options.discount);
 972             }
 973
 974             var last_orderline = this.getLastOrderline();
 975             if( last_orderline && last_orderline.can_be_merged_with(line) && options.merge !== false){
 976                 last_orderline.merge(line);
 977             }else{
 978                 this.get('orderLines').add(line);
 979             }
 980             this.selectLine(this.getLastOrderline());
 981         },
 982         removeOrderline: function( line ){
 983             this.get('orderLines').remove(line);
 984             this.selectLine(this.getLastOrderline());
 985         },
 986         getOrderline: function(id){
 987             var orderlines = this.get('orderLines').models;
 988             for(var i = 0; i < orderlines.length; i++){
 989                 if(orderlines[i].id === id){
 990                     return orderlines[i];
 991                 }
 992             }
 993             return null;
 994         },
 995         getLastOrderline: function(){
 996             return this.get('orderLines').at(this.get('orderLines').length -1);
 997         },
 998         addPaymentline: function(cashregister) {
 999             var paymentLines = this.get('paymentLines');
1000             var newPaymentline = new module.Paymentline({},{cashregister:cashregister});
1001             if(cashregister.journal.type !== 'cash'){
1002                 newPaymentline.set_amount( Math.max(this.getDueLeft(),0) );
1003             }
1004             paymentLines.add(newPaymentline);
1005             this.selectPaymentline(newPaymentline);
1006
1007         },
1008         removePaymentline: function(line){
1009             if(this.selected_paymentline === line){
1010                 this.selectPaymentline(undefined);
1011             }
1012             this.get('paymentLines').remove(line);
1013         },
1014         getName: function() {
1015             return this.get('name');
1016         },
1017         getSubtotal : function(){
1018             return (this.get('orderLines')).reduce((function(sum, orderLine){
1019                 return sum + orderLine.get_display_price();
1020             }), 0);
1021         },
1022         getTotalTaxIncluded: function() {
1023             return (this.get('orderLines')).reduce((function(sum, orderLine) {
1024                 return sum + orderLine.get_price_with_tax();
1025             }), 0);
1026         },
1027         getDiscountTotal: function() {
1028             return (this.get('orderLines')).reduce((function(sum, orderLine) {
1029                 return sum + (orderLine.get_unit_price() * (orderLine.get_discount()/100) * orderLine.get_quantity());
1030             }), 0);
1031         },
1032         getTotalTaxExcluded: function() {
1033             return (this.get('orderLines')).reduce((function(sum, orderLine) {
1034                 return sum + orderLine.get_price_without_tax();
1035             }), 0);
1036         },
1037         getTax: function() {
1038             return (this.get('orderLines')).reduce((function(sum, orderLine) {
1039                 return sum + orderLine.get_tax();
1040             }), 0);
1041         },
1042         getTaxDetails: function(){
1043             var details = {};
1044             var fulldetails = [];
1045             var taxes_by_id = {};
1046
1047             for(var i = 0; i < this.pos.taxes.length; i++){
1048                 taxes_by_id[this.pos.taxes[i].id] = this.pos.taxes[i];
1049             }
1050
1051             this.get('orderLines').each(function(line){
1052                 var ldetails = line.get_tax_details();
1053                 for(var id in ldetails){
1054                     if(ldetails.hasOwnProperty(id)){
1055                         details[id] = (details[id] || 0) + ldetails[id];
1056                     }
1057                 }
1058             });
1059
1060             for(var id in details){
1061                 if(details.hasOwnProperty(id)){
1062                     fulldetails.push({amount: details[id], tax: taxes_by_id[id], name: taxes_by_id[id].name});
1063                 }
1064             }
1065
1066             return fulldetails;
1067         },
1068         getPaidTotal: function() {
1069             return (this.get('paymentLines')).reduce((function(sum, paymentLine) {
1070                 return sum + paymentLine.get_amount();
1071             }), 0);
1072         },
1073         getChange: function() {
1074             return this.getPaidTotal() - this.getTotalTaxIncluded();
1075         },
1076         getDueLeft: function() {
1077             return this.getTotalTaxIncluded() - this.getPaidTotal();
1078         },
1079         // sets the type of receipt 'receipt'(default) or 'invoice'
1080         set_receipt_type: function(type){
1081             this.receipt_type = type;
1082         },
1083         get_receipt_type: function(){
1084             return this.receipt_type;
1085         },
1086         // the client related to the current order.
1087         set_client: function(client){
1088             this.set('client',client);
1089         },
1090         get_client: function(){
1091             return this.get('client');
1092         },
1093         get_client_name: function(){
1094             var client = this.get('client');
1095             return client ? client.name : "";
1096         },
1097         // the order also stores the screen status, as the PoS supports
1098         // different active screens per order. This method is used to
1099         // store the screen status.
1100         set_screen_data: function(key,value){
1101             if(arguments.length === 2){
1102                 this.screen_data[key] = value;
1103             }else if(arguments.length === 1){
1104                 for(key in arguments[0]){
1105                     this.screen_data[key] = arguments[0][key];
1106                 }
1107             }
1108         },
1109         //see set_screen_data
1110         get_screen_data: function(key){
1111             return this.screen_data[key];
1112         },
1113         // exports a JSON for receipt printing
1114         export_for_printing: function(){
1115             var orderlines = [];
1116             this.get('orderLines').each(function(orderline){
1117                 orderlines.push(orderline.export_for_printing());
1118             });
1119
1120             var paymentlines = [];
1121             this.get('paymentLines').each(function(paymentline){
1122                 paymentlines.push(paymentline.export_for_printing());
1123             });
1124             var client  = this.get('client');
1125             var cashier = this.pos.cashier || this.pos.user;
1126             var company = this.pos.company;
1127             var shop    = this.pos.shop;
1128             var date = new Date();
1129
1130             return {
1131                 orderlines: orderlines,
1132                 paymentlines: paymentlines,
1133                 subtotal: this.getSubtotal(),
1134                 total_with_tax: this.getTotalTaxIncluded(),
1135                 total_without_tax: this.getTotalTaxExcluded(),
1136                 total_tax: this.getTax(),
1137                 total_paid: this.getPaidTotal(),
1138                 total_discount: this.getDiscountTotal(),
1139                 tax_details: this.getTaxDetails(),
1140                 change: this.getChange(),
1141                 name : this.getName(),
1142                 client: client ? client.name : null ,
1143                 invoice_id: null,   //TODO
1144                 cashier: cashier ? cashier.name : null,
1145                 header: this.pos.config.receipt_header || '',
1146                 footer: this.pos.config.receipt_footer || '',
1147                 precision: {
1148                     price: 2,
1149                     money: 2,
1150                     quantity: 3,
1151                 },
1152                 date: {
1153                     year: date.getFullYear(),
1154                     month: date.getMonth(),
1155                     date: date.getDate(),       // day of the month
1156                     day: date.getDay(),         // day of the week
1157                     hour: date.getHours(),
1158                     minute: date.getMinutes() ,
1159                     isostring: date.toISOString(),
1160                     localestring: date.toLocaleString(),
1161                 },
1162                 company:{
1163                     email: company.email,
1164                     website: company.website,
1165                     company_registry: company.company_registry,
1166                     contact_address: company.partner_id[1],
1167                     vat: company.vat,
1168                     name: company.name,
1169                     phone: company.phone,
1170                     logo:  this.pos.company_logo_base64,
1171                 },
1172                 shop:{
1173                     name: shop.name,
1174                 },
1175                 currency: this.pos.currency,
1176             };
1177         },
1178         export_as_JSON: function() {
1179             var orderLines, paymentLines;
1180             orderLines = [];
1181             (this.get('orderLines')).each(_.bind( function(item) {
1182                 return orderLines.push([0, 0, item.export_as_JSON()]);
1183             }, this));
1184             paymentLines = [];
1185             (this.get('paymentLines')).each(_.bind( function(item) {
1186                 return paymentLines.push([0, 0, item.export_as_JSON()]);
1187             }, this));
1188             return {
1189                 name: this.getName(),
1190                 amount_paid: this.getPaidTotal(),
1191                 amount_total: this.getTotalTaxIncluded(),
1192                 amount_tax: this.getTax(),
1193                 amount_return: this.getChange(),
1194                 lines: orderLines,
1195                 statement_ids: paymentLines,
1196                 pos_session_id: this.pos.pos_session.id,
1197                 partner_id: this.get_client() ? this.get_client().id : false,
1198                 user_id: this.pos.cashier ? this.pos.cashier.id : this.pos.user.id,
1199                 uid: this.uid,
1200                 sequence_number: this.sequence_number,
1201             };
1202         },
1203         getSelectedLine: function(){
1204             return this.selected_orderline;
1205         },
1206         selectLine: function(line){
1207             if(line){
1208                 if(line !== this.selected_orderline){
1209                     if(this.selected_orderline){
1210                         this.selected_orderline.set_selected(false);
1211                     }
1212                     this.selected_orderline = line;
1213                     this.selected_orderline.set_selected(true);
1214                 }
1215             }else{
1216                 this.selected_orderline = undefined;
1217             }
1218         },
1219         deselectLine: function(){
1220             if(this.selected_orderline){
1221                 this.selected_orderline.set_selected(false);
1222                 this.selected_orderline = undefined;
1223             }
1224         },
1225         selectPaymentline: function(line){
1226             if(line !== this.selected_paymentline){
1227                 if(this.selected_paymentline){
1228                     this.selected_paymentline.set_selected(false);
1229                 }
1230                 this.selected_paymentline = line;
1231                 if(this.selected_paymentline){
1232                     this.selected_paymentline.set_selected(true);
1233                 }
1234                 this.trigger('change:selected_paymentline',this.selected_paymentline);
1235             }
1236         },
1237     });
1238
1239     module.OrderCollection = Backbone.Collection.extend({
1240         model: module.Order,
1241     });
1242
1243     /*
1244      The numpad handles both the choice of the property currently being modified
1245      (quantity, price or discount) and the edition of the corresponding numeric value.
1246      */
1247     module.NumpadState = Backbone.Model.extend({
1248         defaults: {
1249             buffer: "0",
1250             mode: "quantity"
1251         },
1252         appendNewChar: function(newChar) {
1253             var oldBuffer;
1254             oldBuffer = this.get('buffer');
1255             if (oldBuffer === '0') {
1256                 this.set({
1257                     buffer: newChar
1258                 });
1259             } else if (oldBuffer === '-0') {
1260                 this.set({
1261                     buffer: "-" + newChar
1262                 });
1263             } else {
1264                 this.set({
1265                     buffer: (this.get('buffer')) + newChar
1266                 });
1267             }
1268             this.trigger('set_value',this.get('buffer'));
1269         },
1270         deleteLastChar: function() {
1271             if(this.get('buffer') === ""){
1272                 if(this.get('mode') === 'quantity'){
1273                     this.trigger('set_value','remove');
1274                 }else{
1275                     this.trigger('set_value',this.get('buffer'));
1276                 }
1277             }else{
1278                 var newBuffer = this.get('buffer').slice(0,-1) || "";
1279                 this.set({ buffer: newBuffer });
1280                 this.trigger('set_value',this.get('buffer'));
1281             }
1282         },
1283         switchSign: function() {
1284             var oldBuffer;
1285             oldBuffer = this.get('buffer');
1286             this.set({
1287                 buffer: oldBuffer[0] === '-' ? oldBuffer.substr(1) : "-" + oldBuffer
1288             });
1289             this.trigger('set_value',this.get('buffer'));
1290         },
1291         changeMode: function(newMode) {
1292             this.set({
1293                 buffer: "0",
1294                 mode: newMode
1295             });
1296         },
1297         reset: function() {
1298             this.set({
1299                 buffer: "0",
1300                 mode: "quantity"
1301             });
1302         },
1303         resetValue: function(){
1304             this.set({buffer:'0'});
1305         },
1306     });
1307 }