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Add support for printing shoppinglist with thermal printer (#1273)

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* Added escpos-php library

* Added button to shoppinglist print menu

* Added to translation

* Added basic printing logic and API call

* Working implementation for printing with the API

* Added openapi json

* Correctly parsing boolean parameter

* Working button in UI

* Change to grocy formatting

* Add Date

* Only show thermal print button when Feature Flag is set

* Fixed API call and added error message parsing

* Undo translation

* Add flag to print quantities as well

* Added printing notes

* Added quantity conversion

* Increse feed

* Fixed that checkbox was undefined, as dialog was already closed

* Added padding

* Formatting

* Added note about user permission

* Fixed error when using notes instead of products

* Review

- Default FEATURE_FLAG_THERMAL_PRINTER to disabled
- Added missing localization strings (and slightly adjusted one)

* Fixed merge conflicts

Co-authored-by: Bernd Bestel <bernd@berrnd.de>
This commit is contained in:
Marc Ole Bulling
2021-06-18 20:45:42 +02:00
committed by GitHub
parent fe59fac1c3
commit eb135aee39
14 changed files with 413 additions and 49 deletions
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84
services/PrintService.php Normal file
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<?php
namespace Grocy\Services;
use DateTime;
use Exception;
use Mike42\Escpos\PrintConnectors\NetworkPrintConnector;
use Mike42\Escpos\PrintConnectors\FilePrintConnector;
use Mike42\Escpos\Printer;
class PrintService extends BaseService
{
/**
* Initialises the printer
* @return Printer Printer handle
* @throws Exception If unable to connect to printer, an exception is thrown
*/
private static function getPrinterHandle()
{
if (GROCY_TPRINTER_IS_NETWORK_PRINTER) {
$connector = new NetworkPrintConnector(GROCY_TPRINTER_IP, GROCY_TPRINTER_PORT);
} else {
$connector = new FilePrintConnector(GROCY_TPRINTER_CONNECTOR);
}
return new Printer($connector);
}
/**
* Prints the grocy logo and date
* @param Printer $printer Printer handle
*/
private static function printHeader(Printer $printer)
{
$date = new DateTime();
$dateFormatted = $date->format('d/m/Y H:i');
$printer->setJustification(Printer::JUSTIFY_CENTER);
$printer->selectPrintMode(Printer::MODE_DOUBLE_WIDTH);
$printer->setTextSize(4, 4);
$printer->setReverseColors(true);
$printer->text("grocy");
$printer->setJustification();
$printer->setTextSize(1, 1);
$printer->setReverseColors(false);
$printer->feed(2);
$printer->text($dateFormatted);
$printer->selectPrintMode();
$printer->feed(2);
}
/**
* @param bool $printHeader Printing of Grocy logo
* @param string[] $lines Items to print
* @return string[] Returns array with result OK if no exception
* @throws Exception If unable to print, an exception is thrown
*/
public function printShoppingList(bool $printHeader, array $lines): array
{
$printer = self::getPrinterHandle();
if ($printer === false)
throw new Exception("Unable to connect to printer");
if ($printHeader)
{
self::printHeader($printer);
}
foreach ($lines as $line)
{
$printer->text($line);
$printer->feed();
}
$printer->feed(3);
$printer->cut();
$printer->close();
return [
'result' => "OK"
];
}
}