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271 lines
11 KiB
271 lines
11 KiB
odoo.define('pos_barcode_tare.screens', function (require) {
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"use strict";
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var chrome = require('point_of_sale.chrome');
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var core = require('web.core');
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var devices = require('point_of_sale.devices');
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var gui = require('point_of_sale.gui');
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var models = require('point_of_sale.models');
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var screens = require('point_of_sale.screens');
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var utils = require('web.utils');
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var QWeb = core.qweb;
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var _t = core._t;
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var round_pr = utils.round_precision;
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// Define functions used to do unit operation.
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// Get unit search for unit based on unit name.
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var get_unit = function (pos, unit_name) {
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return pos.units.filter(
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function (u) {
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return u.name === unit_name;
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})[0];
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};
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// Convert mass using the reference UOM as pivot unit.
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var convert_mass = function (mass, from_unit, to_unit) {
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// There is no conversion from one category to another.
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if (from_unit.category_id[0] !== to_unit.category_id[0]) {
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return;
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}
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// No need to convert as weights are measured in same unit.
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if (from_unit.id === to_unit.id) {
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return mass;
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}
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// Converts "from_unit" to reference unit of measure.
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var result = mass;
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if (from_unit.uom_type === "bigger") {
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result /= from_unit.factor;
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} else {
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result *= from_unit.factor_inv;
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}
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// Converts reference unit of measure to "to_unit".
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if (to_unit.uom_type === "bigger") {
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result *= to_unit.factor;
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} else {
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result /= to_unit.factor_inv;
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}
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// Round the result.
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return round_pr(result || 0, to_unit.rounding);
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};
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// This configures read action for tare barcode. A tare barcode contains a
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// fake product ID and the weight to be subtracted from the product in the
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// latest order line.
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screens.ScreenWidget.include(
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{
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barcode_weight_action: function (code) {
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var order = this.pos.get_order();
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// Computes the paid weight
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var last_order_line = order.get_last_orderline();
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var total_weight = last_order_line.get_quantity();
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var tare = code.value;
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var product_unit = last_order_line.get_unit();
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// Try to convert tare in KG into product UOM.
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var kg_unit = get_unit(this.pos, "kg");
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var tare_in_product_uom =
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convert_mass(tare, kg_unit, product_unit);
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// Alert when mass conversion failed.
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if (typeof tare_in_product_uom === 'undefined') {
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this.gui.show_popup('error',
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{'title': _t('Mismatch in units of measure'),
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'body': _t('You scanned a tare barcode. ' +
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'The tare is applied to the last product in order. '+
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'We can not apply the tare to this product.')});
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return;
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}
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// Computes the paid (net) weight.
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var paid_weight = total_weight - tare_in_product_uom;
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// Throws a warning popup if the price is negative.
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if (paid_weight <= 0) {
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this.gui.show_popup('confirm',
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{'title': _t('Negative weight'),
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'body': _t('The calculated weight is negative. ' +
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'Did you scan the correct tare label?'),
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confirm: function () {
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// Operator can choose to ignore the warning.
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last_order_line.set_quantity(paid_weight);
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}});
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} else {
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// Updates the prices.
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last_order_line.set_quantity(paid_weight);
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}
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},
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// Setup the callback action for the "weight" barcodes.
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show: function () {
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this._super();
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this.pos.barcode_reader.set_action_callback(
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'weight',
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_.bind(this.barcode_weight_action, this));
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},
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});
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// This create a new button on top of action widget. This button links to
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// the barcode label printing screen defined below.
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var TareScreenButton = screens.ActionButtonWidget.extend({
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template: 'TareScreenButton',
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button_click: function () {
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this.gui.show_screen('tare');
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},
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});
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screens.define_action_button({
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'name': 'tareScreenButton',
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'widget': TareScreenButton,
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});
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// This is a new screen that reads weight from the electronic scale and
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// create a barcode label encoding the weight. The screen shows a preview
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// of the label. The user is expected to check if the preview matches what's
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// measured on the scale. The barcode image is generated by the report
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// module.
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var TareScreenWidget = screens.ScreenWidget.extend({
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template: 'TareScreenWidget',
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next_screen: 'products',
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previous_screen: 'products',
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default_tare_value: 0.0,
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weight_barcode_prefix: null,
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show: function () {
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this._super();
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// Fetch the unit of measure used to save the tare
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this.kg_unit = get_unit(this.pos, "kg");
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// Fetch the barcode prefix from POS barcode parser rules.
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this.weight_barcode_prefix = this.get_barcode_prefix(
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this.pos.config.iface_tare_barcode_sequence_id);
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// Setup the proxy
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var queue = this.pos.proxy_queue;
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// The pooling of the scale starts here.
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var self = this;
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queue.schedule(function () {
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return self.pos.proxy.scale_read().then(function (weight) {
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self.set_weight(weight);
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});
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}, {duration:150, repeat: true});
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// Shows a barcode whose weight might be zero, but this is preferred
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// for UI/UX reasons.
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this.render_receipt();
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this.lock_screen(true);
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},
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get_barcode_prefix: function (barcode_sequence_id) {
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var barcode_pattern = this.get_barcode_pattern(barcode_sequence_id);
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return barcode_pattern.substr(0, 2);
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},
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get_barcode_pattern: function (barcode_sequence_id) {
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var rules = this.get_barcode_rules();
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var rule = rules.filter(
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function (r) {
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return r.sequence === barcode_sequence_id;
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})[0];
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return rule.pattern;
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},
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get_barcode_rules: function () {
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return this.pos.barcode_reader.barcode_parser.nomenclature.rules;
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},
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set_weight: function (scale_measure) {
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var weight = scale_measure.weight;
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var unit = get_unit(this.pos, scale_measure.unit);
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if (weight > 0) {
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this.weight_in_kg = convert_mass(weight, unit, this.kg_unit);
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this.render_receipt();
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this.lock_screen(false);
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}
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},
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get_weight: function () {
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if (typeof this.weight_in_kg === 'undefined') {
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return this.default_tare_value;
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}
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return this.weight_in_kg;
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},
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ean13_checksum: function (s) {
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var result = 0;
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for (var counter = s.length-1; counter >=0; counter--) {
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var counterCheckSum = counter % 2;
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counterCheckSum *= 2;
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counterCheckSum += 1;
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result += parseInt(s.charAt(counter), 10) * counterCheckSum;
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}
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var checksum = 10;
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checksum -= result % 10;
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return checksum % 10;
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},
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barcode_data: function (weight) {
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// We use EAN13 barcode, it looks like 21 00000 12345 x. First there
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// is the prefix, here 21, that is used to decide which type of
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// barcode we're dealing with. A weight barcode has then two groups
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// of five digits. The first group encodes the product id. Here the
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// product id is 00000. The second group encodes the weight in
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// grams. Here the weight is 12.345kg. The last digit of the barcode
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// is a checksum, here symbolized by x.
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var padding_size = 5;
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var void_product_id = '0'.repeat(padding_size);
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var weight_in_gram = weight * 10e2;
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// Weight has to be padded with zeros.
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var weight_with_padding = '0'.repeat(padding_size) + weight_in_gram;
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var padded_weight = weight_with_padding.substr(
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weight_with_padding.length - padding_size);
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// Builds the barcode data (ie. all but the checksum).
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var barcode_data = this.weight_barcode_prefix
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.concat(void_product_id, padded_weight);
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// Compute checksum and concat with barcode data to get the actual
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// barcode.
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var checksum = this.ean13_checksum(barcode_data);
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return barcode_data.concat(checksum);
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},
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get_barcode_data: function () {
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return this.barcode_data(this.get_weight());
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},
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lock_screen: function (locked) {
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this._locked = locked;
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if (locked) {
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this.$('.print-label').addClass('disabled');
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} else {
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this.$('.print-label').removeClass('disabled');
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}
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},
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print_web: function () {
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window.print();
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this.pos.get_order()._printed = true;
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},
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print: function () {
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// See comment in print function of ReceiptScreenWidget
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this.lock_screen(true);
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setTimeout(function () {
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this.lock_screen(false);
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}, 1000);
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this.print_web();
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this.click_back();
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},
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click_back: function () {
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this.close();
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this.gui.show_screen(this.previous_screen);
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},
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renderElement: function () {
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this._super();
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var self = this;
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this.$('.back').click(function () {
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self.click_back();
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});
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this.$('.print-label').click(function () {
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if (!self._locked) {
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self.print();
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}
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});
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},
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render_receipt: function () {
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this.$('.pos-tare-label-container').html(
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QWeb.render('PosTareLabel', {widget:this}));
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},
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close: function () {
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this._super();
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delete this.weight;
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this.pos.proxy_queue.clear();
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},
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});
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gui.define_screen({name:'tare', widget: TareScreenWidget});
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});
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