Read the printer URI from a file; added more checks for input validation.

main.py

@@ -12,14 +12,44 @@ subCategory = ""
 pageNumber = -1
 
 
+#Try to get the URI of the printer at the file in ~/.local/share/scan-auto/printer_uri
+
+try:
+
+    f = open(home+"/.local/share/scan-auto/printer_uri", "r")
+    print(f.readline()) 
+
+    printerURI = f.readline()
+except:
+    print("Please create a file at " + home + "/.local/share/scan-auto/printer_uri")
+
+    print("And populate it with the hp-probe URI of your printer, e.g: escl:https://192.168.X.XX:443")
+
+    exit()
+
 while mainCategory == "":
     try:
-        mainCategory = str(input("Main Category Of Document: "))
+        mainCategory = str(input("Main category of document: "))
         
     except:
         
         mainCategory = ""
 
     if mainCategory == "":
+        #Not best way to do this, but it's a small script, so idc :shrug:
+        os.system("clear") 
+        print("Invalid input, please try again:")
 
 
+while subCategory == "":
+    try:
+        subCategory = str(input("Subcategory of document: "))
+        
+    except:
+        
+        subCategory = ""
+
+    if subCategory == "":
+        #Not best way to do this, but it's a small script, so idc :shrug:
+        os.system("clear") 
+        print("Invalid input, please try again:")