Added printing images

src/printer.py

@@ -3,6 +3,7 @@ from flask import flash
 from escpos.printer import Usb, USBNotFoundError
 from time import sleep, gmtime, strftime
 import os.path
+from PIL import Image
 
 
 class Printer(object):
@@ -130,23 +131,48 @@ class Printer(object):
                 self.printer.close
             except Exception as e:
                 flash("Unable to print because : " + e)
-                
+
         flash("Message printed : " + clean_msg ,category='info')
         return True
 
-    def print_img(self, path):
+    def print_img(self, path, sign):
+        clean_signature = str(sign)
 
-        if os.path.isfile(str(path)):
-            pass
-        else:
+        if not os.path.isfile(str(path)):
             self.app.logger.warning("File does not exist : " + str(path))
+            flash('The file path for this image :' + str(path) + " wasn't found. Please try again.", 'error')
+            return False
+        else:
+            self.app.logger.debug("Printing file from " + str(path))
+
+
+
+        try:
+            self.app.logger.debug("Resizing the image")
+            with Image.open(path) as im:
+
+                basewidth = 575
+                img = Image.open(path)
+                wpercent = (basewidth/float(img.size[0]))
+                hsize = int((float(img.size[1])*float(wpercent)))
+                img = img.resize((basewidth,hsize), Image.ANTIALIAS)
+                if img.height > 1000:
+                    flash("Image is too long, sorry ! Keep it below 500×1000 pixels.",'error')
+                    return False
+                img.save(path)
+        except Exception as e:
+            flash(str(e))
+            self.app.logger.error(str(e))
 
         try:
             self.printer.open(self.usb_args)
+            self.printer.textln("> " + clean_signature + " @ " + strftime("%Y-%m-%d %H:%M:%S", gmtime()))
             self.printer.image(path)
+            self.printer.cut()
             self.printer.close()
+            self.app.logger.debug("Printed an image : " + str(path))
+            return True
         except Exception as e:
             self.printer.close()
-            return e
-        else:
-            self.app.logging.debug("Printed an image : " + str(path))
+            flash(str(e),'error')
+            return False