Configuration max text length via config file

src/printer.py

@@ -119,6 +119,7 @@ class EscPosPrinter(Printer):
         self.usb_args = {}
         self.usb_args["idVendor"] = self.vendor_id
         self.usb_args["idProduct"] = self.device_id
+        self.configuration_file = configuration_file
 
         try:
             # This also calls open(), which we need to close()
@@ -148,13 +149,13 @@ class EscPosPrinter(Printer):
             vendor_id=self.vendor_id,
             product_id=self.device_id,
             serial_number="",
-            label_type=configuration_file["label_type"],
+            label_type=self.configuration_file["label_type"],
         )
 
         # Setting up the printing options.
         # TODO : Expose this to the web interface
         p.set(
-            align=configuration_file["align_text"],
+            align=self.configuration_file["align_text"],
             font="a",
             bold=False,
             underline=0,
@@ -213,25 +214,23 @@ class EscPosPrinter(Printer):
         clean_signature = str(signature)
 
         # Make checks on the size of the message being printed
-        # TODO: make the max length configurable
-        if len(clean_msg) > 4096:
+        if len(clean_msg) > int(self.configuration_file["text_max_length"]):
             self.app.logger.warning(
                 "Could not print message of this length: " + str(len(clean_msg))
             )
             raise RuntimeError(
                 "Could not print message of this length :"
                 + str(len(clean_msg))
-                + ", needs to be below 4096 caracters long."
+                + ", needs to be below %s caracters long.", str(self.configuration_file["text_max_length"])
             )
-        # TODO: make the max length configurable
-        if len(signature) > 256:
+        if len(signature) > int(self.configuration_file["signature_max_length"]):
             self.app.logger.warning(
                 "Could not print signature of this length: " + str(len(clean_signature))
             )
             raise RuntimeError(
                 "Could not print signature of this length :"
                 + str(len(clean_signature))
-                + ", needs to be below 256 caracters long."
+                + ", needs to be below %s caracters long.", str(self.configuration_file["signature_max_length"])
             )
 
         # Do the actual printing
@@ -256,17 +255,17 @@ class EscPosPrinter(Printer):
     def _print_img(self, path, signature="", center=True, process=False):
         clean_signature = str(signature)
 
-        # TODO: make the max length configurable
-        if len(signature) > 256:
+        if len(signature) > int(self.configuration_file["signature_max_length"]):
             self.app.logger.warning(
                 "Could not print signature of this length: " + str(len(clean_signature))
             )
-            raise ValueError(
+            raise RuntimeError(
                 "Could not print signature of this length :"
                 + str(len(clean_signature))
-                + ", needs to be below 256 caracters long."
+                + ", needs to be below %s caracters long.", str(self.configuration_file["signature_max_length"])
             )
 
+
         if not os.path.isfile(str(path)):
             self.app.logger.warning("File does not exist : " + str(path))
             raise OSError(