Store node's hrn (SFA specific human readable name) using the 'hrn' tag. This tag...

[plcapi.git] / PLC / Namespace.py

diff --git a/PLC/Namespace.py b/PLC/Namespace.py
new file mode 100644 (file)
index 0000000..2d41fea
--- /dev/null
+++ b/PLC/Namespace.py
@@ -0,0 +1,89 @@
+### $Id: Namespace.py 
+### $URL: 
+
+URN_PREFIX = "urn:publicid:IDN"
+
+def get_leaf(hrn):
+    parts = hrn.split(".")
+    return ".".join(parts[-1:])
+
+def get_authority(hrn):
+    parts = hrn.split(".")
+    return ".".join(parts[:-1])
+
+def hrn_to_pl_slicename(hrn):
+    parts = hrn.split(".")
+    return parts[-2] + "_" + parts[-1]
+
+# assuming hrn is the hrn of an authority, return the plc authority name
+def hrn_to_pl_authname(hrn):
+    parts = hrn.split(".")
+    return parts[-1]
+
+# assuming hrn is the hrn of an authority, return the plc login_base
+def hrn_to_pl_login_base(hrn):
+    return hrn_to_pl_authname(hrn)
+
+def hostname_to_hrn(auth_hrn, login_base, hostname):
+    """
+    Convert hrn to plantelab name.
+    """
+    sfa_hostname = ".".join([auth_hrn, login_base, hostname.split(".")[0]])
+    return sfa_hostname
+
+def slicename_to_hrn(auth_hrn, slicename):
+    """
+    Convert hrn to planetlab name.
+    """
+    parts = slicename.split("_")
+    slice_hrn = ".".join([auth_hrn, parts[0]]) + "." + "_".join(parts[1:])
+
+    return slice_hrn
+
+def email_to_hrn(auth_hrn, email):
+    parts = email.split("@")
+    username = parts[0]
+    username = username.replace(".", "_") 
+    person_hrn = ".".join([auth_hrn, username])
+    
+    return person_hrn 
+
+def urn_to_hrn(urn):
+    """
+    convert a urn to hrn
+    return a tuple (hrn, type)
+    """
+
+    # if this is already a hrn dont do anything
+    if not urn or not urn.startswith(URN_PREFIX):
+        return urn, None
+
+    name = urn[len(URN_PREFIX):]
+    hrn_parts = name.split("+")
+    
+    # type is always the second to last element in the list
+    type = hrn_parts.pop(-2)
+
+    # convert hrn_parts (list) into hrn (str) by doing the following    
+    # remove blank elements
+    # replace ':' with '.'
+    # join list elements using '.'
+    hrn = '.'.join([part.replace(':', '.') for part in hrn_parts if part]) 
+   
+    return str(hrn), str(type) 
+    
+    
+def hrn_to_urn(hrn, type=None):
+    """
+    convert an hrn and type to a urn string
+    """
+    # if  this is already a urn dont do anything 
+    if not hrn or hrn.startswith(URN_PREFIX):
+        return hrn
+
+    authority = get_authority(hrn)
+    name = get_leaf(hrn)
+    urn = "+".join([unicode(part).replace('.', ':') \
+                    for part in ['',authority,type,name]])
+
+    return URN_PREFIX + urn