Menu items to run a function

Dev Community Dev/API Corner
1

I'm in need of a menu item that basically re-downloads an xml list of channels.

 

How should I go about doing that.

 

At present, I'm reusing a function that already exists, as it's used to pull the channel list initially. However when I put it in as a callback in the key value of a directory object, it chokes on a 'referenced before assignment' error when i try to use the passed variable SERVER.

 

The Menu function:

def UpdateChannelLists(TITLE):
    # Open an Object Container for the update channel lists menu
    UPDATE_CHANNELS_MENU    = ObjectContainer(
        title1              = TITLE
    )

# Add option to update main server channel list
UPDATE_CHANNELS_MENU.add(
    DirectoryObject(
        title           = "Main Server Channel List",
        thumb           = R(ICON),
        summary         = "Updates the channel list for the main server",
        key             = Callback(
            GetChannelListXML,
            SERVER      = "Main"
        )
    )
)


# Add option to update BT server channel list
UPDATE_CHANNELS_MENU.add(
    DirectoryObject(
        title           = "BT Server Channel List",
        thumb           = R("BT.png"),
        summary         = "Updates the channel list for the BT server",
        key             = Callback(
            GetChannelListXML,
            SERVER  = "BT"
        )
    )
)

return UPDATE_CHANNELS_MENU

The GetChannelListXML function:

def GetChannelListXML(SERVER):
    # Deletes any existing channel lists
    Data.Remove(XML_PREFIX + SERVER + XML_SUFFIX)

# Construct CHANNEL_LIST_URL based on SERVER variable
if SERVER is "Main":   
    CHANNEL_LIST_URL        = URL_BASE + URL_MEMBERS_AREA + URL_CHANNEL_LIST_MAIN
elif SERVER is "BT":
    CHANNEL_LIST_URL        = URL_BASE + URL_MEMBERS_AREA + URL_CHANNEL_LIST_BT

# Grab the XML file
CHANNEL_LIST_SOURCE         = HTTP.Request(CHANNEL_LIST_URL).content

# Save the data as an XML file based on value of SERVER variable
Data.Save(XML_PREFIX + SERVER + XML_SUFFIX,CHANNEL_LIST_SOURCE)

# Gets the alert to show the user
ALERT                       = SuccessChannelList(SERVER)

return ALERT

The error I get when I click either of the two menu items:

2014-08-25 18:12:07,621 (111c01000) :  CRITICAL (sandbox:303) - Exception when calling function 'GetChannelListXML' (most recent call last):
  File "/Users/loz/Library/Application Support/Plex Media Server/Plug-ins/Framework.bundle/Contents/Resources/Versions/2/Python/Framework/code/sandbox.py", line 294, in call_named_function
    result = f(*args, **kwargs)
  File "/Users/loz/Library/Application Support/Plex Media Server/Plug-ins/PremierAdLive.bundle/Contents/Code/__init__.py", line 190, in GetChannelListXML
    CHANNEL_LIST_SOURCE         = HTTP.Request(CHANNEL_LIST_URL).content
UnboundLocalError: local variable 'CHANNEL_LIST_URL' referenced before assignment

So, it's skipping the if/elif statement at the top of the GetChannelListXML function, but I don't know why – I'm passing in correct values so there should be a match.

2

Try CHANNEL_LIST_URL = None


def GetChannelListXML(SERVER):
    # Deletes any existing channel lists
    Data.Remove(XML_PREFIX + SERVER + XML_SUFFIX)

CHANNEL_LIST_URL = None

# Construct CHANNEL_LIST_URL based on SERVER variable
if SERVER is "Main":   
    CHANNEL_LIST_URL        = URL_BASE + URL_MEMBERS_AREA + URL_CHANNEL_LIST_MAIN
elif SERVER is "BT":
    CHANNEL_LIST_URL        = URL_BASE + URL_MEMBERS_AREA + URL_CHANNEL_LIST_BT

# Grab the XML file
CHANNEL_LIST_SOURCE         = HTTP.Request(CHANNEL_LIST_URL).content

# Save the data as an XML file based on value of SERVER variable
Data.Save(XML_PREFIX + SERVER + XML_SUFFIX,CHANNEL_LIST_SOURCE)

# Gets the alert to show the user
ALERT                       = SuccessChannelList(SERVER)

return ALERT
3

That doesn't work unfortunately as it just passes that none value as the URL in this line (as the if/elif statement is skipped):

# Grab the XML file
CHANNEL_LIST_SOURCE         = HTTP.Request(CHANNEL_LIST_URL).content

I've managed to fix it via using "==" instead of "is" in the comparison.

    # Construct CHANNEL_LIST_URL based on SERVER variable
    if SERVER == "Main":   
        CHANNEL_LIST_URL        = URL_BASE + URL_MEMBERS_AREA + URL_CHANNEL_LIST_MAIN
    elif SERVER == "BT":
        CHANNEL_LIST_URL        = URL_BASE + URL_MEMBERS_AREA + URL_CHANNEL_LIST_BT
4

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