Added printing images

src/web.py

@@ -1,4 +1,5 @@
 from flask import Flask, request
+from werkzeug.utils import secure_filename
 from printer import Printer
 import time
 import os
@@ -19,11 +20,49 @@ class Web(object):
 
         return self.printer.print_sms(texte, sign)
 
-    def print_image(self, image):
-        pass
+    def print_image(self, image, sign: str) -> bool:
+        self.app.logger.debug("Uploading file")
+        try:
+            self.app.logger.debug("Uploading file from " + str(sign))
+            if self.upload_file(image):
+                self.app.logger.debug("File has been uploaded, printing...")
+                self.printer.print_img(os.path.join(self.app.config['UPLOAD_FOLDER'], secure_filename(image.filename)), sign)
+                return True
+            else:
+                return False
+        except Exception as e:
+            self.app.logger.error(e)
+            raise Exception
+
+        else:
+            flash("Could not upload file.",'error')
+            return False
 
     def login(username: str,password: str) -> bool:
         pass
 
     def logout(username: str, password: str) -> bool:
         pass
+
+    def allowed_file(self, filename) -> bool:
+        self.app.logger.debug("Is the filename allowed ?")
+        return '.' in filename and filename.rsplit('.', 1)[1].lower() in self.app.config['ALLOWED_EXTENSIONS']
+
+    def upload_file(self, image)-> bool:
+        self.app.logger.debug("Validating file")
+        if image and self.allowed_file(image.filename):
+            filename = secure_filename(image.filename)
+            self.app.logger.debug("File valid")
+            try:
+                image.save(os.path.join(self.app.config['UPLOAD_FOLDER'], filename))
+                self.app.logger.debug("File saved")
+            except Exception as e:
+                self.app.logger.error("Could not save file")
+                flash(e,'error')
+                return False
+
+            self.app.logger.debug("File saved to " + str(os.path.join(self.app.config['UPLOAD_FOLDER'], filename)))
+            return True
+        else:
+            self.app.logger.error("Could not save file " + str(filename))
+            return False