Added basic printing logic and API call

config-dist.php

@@ -182,7 +182,8 @@ Setting('FEATURE_FLAG_STOCK_PRODUCT_FREEZING', true);
 Setting('FEATURE_FLAG_STOCK_BEST_BEFORE_DATE_FIELD_NUMBER_PAD', true); // Activate the number pad in due date fields on (supported) mobile browsers
 Setting('FEATURE_FLAG_SHOPPINGLIST_MULTIPLE_LISTS', true);
 Setting('FEATURE_FLAG_CHORES_ASSIGNMENTS', true);
+Setting('FEATURE_FLAG_THERMAL_PRINTER', true);
 
 // Feature settings
 Setting('FEATURE_SETTING_STOCK_COUNT_OPENED_PRODUCTS_AGAINST_MINIMUM_STOCK_AMOUNT', true); // When set to true, opened items will be counted as missing for calculating if a product is below its minimum stock amount
-Setting('FEATURE_FLAG_AUTO_TORCH_ON_WITH_CAMERA', true); // Enables the torch automaticaly (if the device has one)
+Setting('FEATURE_FLAG_AUTO_TORCH_ON_WITH_CAMERA', true); // Enables the torch automatically (if the device has one)

controllers/BaseController.php

@@ -11,6 +11,7 @@ use Grocy\Services\ChoresService;
 use Grocy\Services\DatabaseService;
 use Grocy\Services\FilesService;
 use Grocy\Services\LocalizationService;
+use Grocy\Services\PrintService;
 use Grocy\Services\RecipesService;
 use Grocy\Services\SessionService;
 use Grocy\Services\StockService;
@@ -93,6 +94,12 @@ class BaseController
 		return StockService::getInstance();
 	}
 
+	protected function getPrintService()
+	{
+		return PrintService::getInstance();
+	}
+
+
 	protected function getTasksService()
 	{
 		return TasksService::getInstance();

controllers/PrintApiController.php

@@ -0,0 +1,39 @@
+<?php
+
+namespace Grocy\Controllers;
+
+use Grocy\Controllers\Users\User;
+use Grocy\Services\StockService;
+
+class PrintApiController extends BaseApiController {
+
+	public function PrintShoppingListThermal(\Psr\Http\Message\ServerRequestInterface $request, \Psr\Http\Message\ResponseInterface $response, array $args) {
+
+		try {
+			User::checkPermission($request, User::PERMISSION_SHOPPINGLIST);
+
+			$params = $request->getQueryParams();
+
+			$listId = 1;
+			if (isset($params['list'])) {
+				$listId = $params['list'];
+			}
+
+			$printHeader = true;
+			if (isset($params['printHeader'])) {
+				$printHeader = $params['printHeader'];
+			}
+			$items = $this->getStockService()->GetShoppinglistInPrintableStrings($listId);
+			return $this->ApiResponse($response, $this->getPrintService()->printShoppingList($printHeader, $items));
+		} catch (\Exception $ex) {
+			return $this->GenericErrorResponse($response, $ex->getMessage());
+		}
+	}
+
+
+// @formatter:off
+	public function __construct(\DI\Container $container)
+	{
+		parent::__construct($container);
+	}
+}

controllers/StockApiController.php

@@ -1,5 +1,4 @@
 <?php
-
 namespace Grocy\Controllers;
 
 use Grocy\Controllers\Users\User;

controllers/StockController.php

@@ -437,6 +437,7 @@ class StockController extends BaseController
 		]);
 	}
 
+
 	public function Stockentries(\Psr\Http\Message\ServerRequestInterface $request, \Psr\Http\Message\ResponseInterface $response, array $args)
 	{
 		$usersService = $this->getUsersService();

routes.php

@@ -228,6 +228,9 @@ $app->group('/api', function (RouteCollectorProxy $group) {
 	$group->post('/chores/executions/{executionId}/undo', '\Grocy\Controllers\ChoresApiController:UndoChoreExecution');
 	$group->post('/chores/executions/calculate-next-assignments', '\Grocy\Controllers\ChoresApiController:CalculateNextExecutionAssignments');
 
+	//Printing
+	$group->get('/print/shoppinglist/thermal', '\Grocy\Controllers\PrintApiController:PrintShoppingListThermal');
+
 	// Batteries
 	$group->get('/batteries', '\Grocy\Controllers\BatteriesApiController:Current');
 	$group->get('/batteries/{batteryId}', '\Grocy\Controllers\BatteriesApiController:BatteryDetails');

services/BaseService.php

@@ -66,4 +66,10 @@ class BaseService
 	{
 		return UsersService::getInstance();
 	}
+
+	protected function getPrintService()
+	{
+		return PrintService::getInstance();
+	}
+
 }

services/PrintService.php

@@ -0,0 +1,79 @@
+<?php
+
+namespace Grocy\Services;
+
+use Exception;
+use Mike42\Escpos\PrintConnectors\FilePrintConnector;
+use Mike42\Escpos\Printer;
+
+class PrintService extends BaseService {
+
+	/**
+	 * Checks if a thermal printer has been configured
+	 * @return bool
+	 */
+	private static function isThermalPrinterEnabled(): bool {
+		//TODO
+		return true;
+	}
+
+	/**
+	 * Initialises the printer
+	 * @return Printer handle
+	 * @throws Exception if unable to connect to printer
+	 */
+	private static function getPrinterHandle() {
+		$connector = new FilePrintConnector("php://stdout");
+		return new Printer($connector);
+	}
+
+
+	/**
+	 * Prints a grocy logo
+	 * @param $printer
+	 */
+	private static function printHeader(Printer $printer) {
+		$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->selectPrintMode();
+		$printer->feed(6);
+	}
+
+	/**
+	 * @param bool $printHeader Printing of Grocy logo
+	 * @param string[] $items Items to print
+	 * @return string[]
+	 * @throws Exception
+	 */
+	public function printShoppingList(bool $printHeader, array $items): array {
+		if (!self::isThermalPrinterEnabled()) {
+			throw new Exception("Printer is not setup enabled in configuration");
+		}
+		$printer = self::getPrinterHandle();
+		if ($printer === false)
+			throw new Exception("Unable to connect to printer");
+
+		if ($printHeader) {
+			self::printHeader($printer);
+		}
+
+		foreach ($items as $item) {
+			$printer->text($item);
+			$printer->feed();
+		}
+
+		$printer->feed(2);
+		$printer->cut();
+		$printer->close();
+		return [
+			'result' => "OK",
+			'printed' => $items
+		];
+	}
+}

services/StockService.php

@@ -1,5 +1,6 @@
 <?php
 
+// @formatter:off
 namespace Grocy\Services;
 
 class StockService extends BaseService
@@ -935,6 +936,20 @@ class StockService extends BaseService
 		}
 	}
 
+	public function GetShoppinglistInPrintableStrings($listId = 1): array {
+		if (!$this->ShoppingListExists($listId)) {
+			throw new \Exception('Shopping list does not exist');
+		}
+
+		$result                   = array();
+		$rowsShoppingListProducts = $this->getDatabase()->shopping_list()->where('shopping_list_id = :1', $listId)->fetchAll();
+		foreach ($rowsShoppingListProducts as $row) {
+			$product = $this->getDatabase()->products()->where('id = :1', $row['product_id'])->fetch();
+			array_push($result, $row["amount"] . " " . $product["name"]);
+		}
+		return $result;
+	}
+
 	public function TransferProduct(int $productId, float $amount, int $locationIdFrom, int $locationIdTo, $specificStockEntryId = 'default', &$transactionId = null)
 	{
 		if (!$this->ProductExists($productId))
@@ -1390,7 +1405,7 @@ class StockService extends BaseService
 
 	private function LocationExists($locationId)
 	{
-		$locationRow = $this->getDatabase()->locations()->where('id = :1', $locationId)->fetch();
+		$locationRow = $this->getDatabase()->locations()->where('id = :1', $locationId)->fetchAll();
 		return $locationRow !== null;
 	}