moved SymlinkName into shared

shared.py

@@ -1,4 +1,5 @@
 import socket
+import os
 
 hostname = socket.gethostname()
 PROD_HOST="pa_web"
@@ -27,3 +28,16 @@ def CreateSelect(name, selected, list, js=""):
         str += f'>{el}</option>'
     str += '</select>'
     return str
+
+def SymlinkName(path, file):
+    sig_bit=file.replace(path, "")
+    last_dir=os.path.basename(path[0:-1])
+
+    if sig_bit[-1] == '/':
+        last_bit = os.path.dirname(sig_bit)[0:-1]
+    else:
+        last_bit = os.path.dirname(sig_bit)
+    symlink = 'static/'+last_dir+'/'+last_bit
+    if symlink[-1] == '/':
+        symlink=symlink[0:-1]
+    return symlink