implemented dc_updatePrinterTemplate

src/hwapi.cpp

@@ -11,6 +11,8 @@
 #include <unistd.h>
 #include <thread>
 
+#include <QFileInfo>
+
 #include "tslib.h"
 #include "hwapi.h"
 
@@ -404,6 +406,40 @@ bool hwapi::dc_updateDC(QString bFile, QString br, QString serial) const {
     return true;
 }
 
+/******************************************************************************/
+//
+//                   LEVEL 3: hwapi::dc_updatePrinterTemplate
+//
+/******************************************************************************/
+bool hwapi::dc_updatePrinterTemplate(enum FileTypeJson type,
+                                     int nrOfTemplate,
+                                     QString const &fname) const {
+    if ((type == FileTypeJson::PRINTER) &&
+        (nrOfTemplate >= 0 && nrOfTemplate <= 32)) {
+
+        int nTry = 50;
+        while (!sys_ready4sending()) { // wait max. 5 seconds
+            std::this_thread::sleep_for(std::chrono::milliseconds(100));
+            if (--nTry <= 0) {
+                return false;
+            } 
+        }
+        QFile file(fname);
+        if (file.exists() && file.open(QIODevice::ReadOnly)) {
+            QByteArray ba = file.readAll();
+            if (ba.size() <= 800) { // max. size is 800 bytes
+                if (sys_sendJsonFileToDc((uint8_t)(type),
+                                          nrOfTemplate,
+                                          (uint8_t *)ba.data())) {
+                    std::this_thread::sleep_for(std::chrono::seconds(1));
+                    return true;
+                }
+            }
+        }
+    }
+
+    return false;
+}
 
 // ------------------------------------------------------------------------------
 // Level 1, control device-controller (functions of µC)