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odoo.define('pos_barcode_tare.screens', function (require) {
"use strict"; var core = require('web.core'); var gui = require('point_of_sale.gui'); var models = require('point_of_sale.models'); var screens = require('point_of_sale.screens'); var utils = require('web.utils'); var field_utils = require('web.field_utils');
var QWeb = core.qweb; var _t = core._t; var round_pr = utils.round_precision; var round_di = utils.round_decimals; var tare_barcode_type = "tare";
// Define functions used to do unit operation.
// Get unit search for unit based on unit name.
var get_unit = function (pos, unit_name) { return pos.units.filter( function (u) { return u.name === unit_name; })[0]; };
// Convert mass using the reference UOM as pivot unit.
var convert_mass = function (mass, from_unit, to_unit) { // There is no conversion from one category to another.
if (from_unit.category_id[0] !== to_unit.category_id[0]) { throw new Error(_.str.sprintf( _t("We can not cast a weight in %s into %s."), from_unit.name, to_unit.name)); } // No need to convert as weights are measured in same unit.
if (from_unit.id === to_unit.id) { return mass; } // Converts "from_unit" to reference unit of measure.
var result = mass; if (from_unit.uom_type === "bigger") { result /= from_unit.factor; } else { result *= from_unit.factor_inv; } // Converts reference unit of measure to "to_unit".
if (to_unit.uom_type === "bigger") { result *= to_unit.factor; } else { result /= to_unit.factor_inv; }
if (to_unit.rounding) { // Return the rounded result if needed.
return round_pr(result || 0, to_unit.rounding); }
return result || 0; };
// Format the tare value.
var format_tare = function (pos, qty, unit) { if (unit.rounding) { var q = round_pr(qty, unit.rounding); var decimals = pos.dp['Product Unit of Measure']; return field_utils.format.float( round_di(q, decimals), {type: 'float', digits: [69, decimals]}); } return qty.toFixed(0); };
// This configures read action for tare barcode. A tare barcode contains a
// fake product ID and the weight to be subtracted from the product in the
// latest order line.
screens.ScreenWidget.include( { barcode_tare_action: function (code) { try { var order = this.pos.get_order(); var selected_order_line = order.get_selected_orderline(); var tare_weight = code.value; selected_order_line.set_tare(tare_weight); } catch (error) { var title = _t("We can not apply this tare barcode."); var popup = {title: title, body: error.message}; this.gui.show_popup('error', popup); } }, // Setup the callback action for the "weight" barcodes.
show: function () { this._super(); this.pos.barcode_reader.set_action_callback( 'tare', _.bind(this.barcode_tare_action, this)); }, });
// This create a new button on top of action widget. This button links to
// the barcode label printing screen defined below.
var TareScreenButton = screens.ActionButtonWidget.extend({ template: 'TareScreenButton',
button_click: function () { this.gui.show_screen('tare'); }, });
screens.define_action_button({ 'name': 'tareScreenButton', 'widget': TareScreenButton, });
// This is a new screen that reads weight from the electronic scale and
// create a barcode label encoding the weight. The screen shows a preview
// of the label. The user is expected to check if the preview matches what's
// measured on the scale. The barcode image is generated by the report
// module.
var TareScreenWidget = screens.ScreenWidget.extend({ template: 'TareScreenWidget', next_screen: 'products', previous_screen: 'products', default_tare_value: 0.0, weight_barcode_prefix: null,
show: function () { this._super(); // Fetch the unit of measure used to save the tare
this.kg_unit = get_unit(this.pos, "kg"); // Fetch the barcode prefix from POS barcode parser rules.
this.weight_barcode_prefix = this.get_barcode_prefix(); // Setup the proxy
var queue = this.pos.proxy_queue; // The pooling of the scale starts here.
var self = this; queue.schedule(function () { return self.pos.proxy.scale_read().then(function (weight) { try { self.set_weight(weight); } catch (error) { var title = _t("Failed to read weight from scale."); var popup = {title: title, body: error.message}; self.gui.show_popup('error', popup); } }); }, {duration:150, repeat: true}); // Shows a barcode whose weight might be zero, but this is preferred
// for UI/UX reasons.
this.render_receipt(); this.lock_screen(true); }, get_barcode_prefix: function () { var barcode_pattern = this.get_barcode_pattern(); return barcode_pattern.substr(0, 2); }, get_barcode_pattern: function () { var rules = this.get_barcode_rules(); var rule = rules.filter( function (r) { // We select the first (smallest sequence ID) barcode rule
// with the expected type.
return r.type === tare_barcode_type; })[0]; return rule.pattern; }, get_barcode_rules: function () { return this.pos.barcode_reader.barcode_parser.nomenclature.rules; }, set_weight: function (scale_measure) { var weight = scale_measure.weight; var unit = get_unit(this.pos, scale_measure.unit);
if (typeof unit === 'undefined') { throw new Error(_.str.sprintf( _t("The scale sent a measure in %s unit. This unit of "+ "measure (UOM) in not found in the point of sale. You " + "may need to create a new UOM named %s. The UOM name is "+ "case sensitive."), scale_measure.unit, scale_measure.unit)); }
if (weight > 0) { this.weight_in_kg = convert_mass(weight, unit, this.kg_unit); this.render_receipt(); this.lock_screen(false); } }, get_weight: function () { if (typeof this.weight_in_kg === 'undefined') { return this.default_tare_value; } return this.weight_in_kg; }, barcode_data: function (weight) { // We use EAN13 barcode, it looks like 07 00000 12345 x. First there
// is the prefix, here 07, that is used to decide which type of
// barcode we're dealing with. A weight barcode has then two groups
// of five digits. The first group encodes the product id. Here the
// product id is 00000. The second group encodes the weight in
// grams. Here the weight is 12.345kg. The last digit of the barcode
// is a checksum, here symbolized by x.
var padding_size = 5; var void_product_id = '0'.repeat(padding_size); var weight_in_gram = weight * 1e3;
if (weight_in_gram >= Math.pow(10, padding_size)) { throw new RangeError(_t("Maximum tare weight is 99.999kg")); }
// Weight has to be padded with zeros.
var weight_with_padding = '0'.repeat(padding_size) + weight_in_gram; var padded_weight = weight_with_padding.substr( weight_with_padding.length - padding_size); // Builds the barcode using a placeholder checksum.
var barcode = this.weight_barcode_prefix .concat(void_product_id, padded_weight) .concat(0); // Compute checksum
var barcode_parser = this.pos.barcode_reader.barcode_parser; var checksum = barcode_parser.ean_checksum(barcode); // Replace checksum placeholder by the actual checksum.
return barcode.substr(0, 12).concat(checksum); }, get_barcode_data: function () { return this.barcode_data(this.get_weight()); }, lock_screen: function (locked) { this._locked = locked; if (locked) { this.$('.print-label').addClass('disabled'); } else { this.$('.print-label').removeClass('disabled'); } }, print_web: function () { window.print(); // TODO check this
this.pos.get_order()._printed = true; }, print: function () { // See comment in print function of ReceiptScreenWidget
this.lock_screen(true); var self = this; setTimeout(function () { self.lock_screen(false); }, 1000);
this.print_web(); this.click_back(); }, click_back: function () { this.close(); this.gui.show_screen(this.previous_screen); }, renderElement: function () { this._super(); var self = this; this.$('.back').click(function () { self.click_back(); }); this.$('.print-label').click(function () { if (!self._locked) { self.print(); } }); }, render_receipt: function () { this.$('.pos-tare-label-container').html( QWeb.render('PosTareLabel', {widget:this})); }, close: function () { this._super(); delete this.weight; this.pos.proxy_queue.clear(); }, get_tare_str: function () { return format_tare(this.pos, this.get_weight(), get_unit(this.pos, "kg")); }, });
gui.define_screen({name:'tare', widget: TareScreenWidget});
// Update Orderline model
var _super_ = models.Orderline.prototype; var OrderLineWithTare = models.Orderline.extend({ initialize: function (session, attributes) { this.tareQuantity = 0; this.tareQuantityStr = '0'; return _super_.initialize.call(this, session, attributes); }, init_from_JSON: function (json) { _super_.init_from_JSON.call(this, json); this.tareQuantity = json.tareQuantity ||0; this.tareQuantityStr = json.tareQuantityStr ||'0'; }, set_tare: function (quantity) { this.order.assert_editable();
// Prevent to apply multiple times a tare to the same product.
if (this.get_tare() > 0) { throw new RangeError(_.str.sprintf( _t("The tare (%s) is already set for the " + "product \"%s\". We can not re-apply a tare to this " + "product."), this.get_tare_str_with_unit(), this.product.display_name)); }
// We convert the tare that is always measured in kilogrammes into
// the unit of measure for this order line.
var kg = get_unit(this.pos, "kg"); var tare = parseFloat(quantity) || 0; var unit = this.get_unit(); var tare_in_product_uom = convert_mass(tare, kg, unit); var tare_in_product_uom_string = format_tare(this.pos, tare_in_product_uom, unit); var net_quantity = this.get_quantity() - tare_in_product_uom; // This method fails when the net weight is negative.
if (net_quantity <= 0) { throw new RangeError(_.str.sprintf( _t("The tare weight is %s %s, it's greater or equal to " + "the product weight %s. We can not apply this tare."), tare_in_product_uom_string, unit.name, this.get_quantity_str_with_unit())); } // Update tare value.
this.tareQuantity = tare_in_product_uom; this.tareQuantityStr = tare_in_product_uom_string; // Update the quantity with the new weight net of tare quantity.
this.set_quantity(net_quantity); this.trigger('change', this); }, get_tare: function () { return this.tareQuantity; }, get_tare_str: function () { return this.tareQuantityStr; }, get_tare_str_with_unit: function () { var unit = this.get_unit(); return this.tareQuantityStr + ' ' + unit.name; }, export_as_JSON: function () { var json = _super_.export_as_JSON.call(this); json.tareQuantity = this.get_tare(); json.tareQuantityStr = this.get_tare_str(); return json; }, clone: function () { var orderline = _super_.clone.call(this); orderline.tareQuantity = this.tareQuantity; orderline.tareQuantityStr = this.tareQuantityStr; return orderline; }, export_for_printing: function () { var result = _super_.export_for_printing.call(this); result.tare_quantity = this.get_tare(); return result; }, });
models.Orderline = OrderLineWithTare;
return {TareScreenWidget: TareScreenWidget, OrderLineWithTare: OrderLineWithTare, get_unit: get_unit}; });
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