Grocycode, label printing (#1500)

* Grocycode: Productpicker, StockService

* Grocycode: Datamatrix generation

* Grocycode: Display in UI, make Images downloadable

* Grocycode: Do not show on product card

* Grocycode: Stockentry Label view

* Grocycode: Webhooks & Labelprinter Feature

* Grocycode: Manual Label printing

* Grocycode: Print Label from product form

* Quagga2: use zxing for DataMatrix recognition

* Grocycode: Default settings for label printing

* Prepare merge of master

* Grocycode: docs

* Docs: label printing webhook

* Review

- "grocy" is currently written lower-case everywhere, so let's do this also for "grocycode"
- Unified phrases / capitalization
- Minor UI adjustments (mainly context menu item ordering / ordering/spacing on product edit page)
- Documented API changes for Swagger UI (grocy.openapi.json)
- Reverted German localizations (those are managed via Transifex; would cause conflicts when manually edited - will import them later there)
- Reverted a somehow messed up localization string (productform/help text for `cumulate_min_stock_amount_of_sub_products`)
- Suppress deprecation warnings when generating Datamatrix PNG (otherwise the PNG is invalid, https://github.com/jucksearm/php-barcode/issues/3)
- Default `FEATURE_FLAG_LABELPRINTER` to disabled

Co-authored-by: Bernd Bestel <bernd@berrnd.de>

public/viewjs/productform.js

@@ -301,6 +301,21 @@ $('#name').focus();
 $('.input-group-qu').trigger('change');
 Grocy.FrontendHelpers.ValidateForm('product-form');
 
+$(document).on('click', '.stockentry-grocycode-product-label-print', function(e)
+{
+	e.preventDefault();
+	document.activeElement.blur();
+
+	var productId = $(e.currentTarget).attr('data-product-id');
+	Grocy.Api.Get('stock/products/' + productId + '/printlabel', function(labelData)
+	{
+		if (Grocy.Webhooks.labelprinter !== undefined)
+		{
+			Grocy.FrontendHelpers.RunWebhook(Grocy.Webhooks.labelprinter, labelData);
+		}
+	});
+});
+
 $(document).on('click', '.qu-conversion-delete-button', function(e)
 {
 	var objectId = $(e.currentTarget).attr('data-qu-conversion-id');
@@ -388,6 +403,22 @@ $('#qu_id_stock').change(function(e)
 	}
 });
 
+$('#allow_label_per_unit').on('change', function()
+{
+	if (this.checked)
+	{
+		$('#label-option-per-unit').prop("disabled", false);
+	}
+	else
+	{
+		if ($('#default_print_stock_label').val() == "2")
+		{
+			$("#default_print_stock_label").val("0");
+		}
+		$('#label-option-per-unit').prop("disabled", true);
+	}
+});
+
 $(window).on("message", function(e)
 {
 	var data = e.originalEvent.data;