I am using VideoPlayer from ROKU SDK.
How can I implement to also support JSON file on the videoplayer app?
I want use both XML from videoplayer and JSON from here https://blog.roku.com/developer/2012/07/16/json-support-comes-to-roku/
Here is the code from categoryfeed.brs
'******************************************************
'** Video Player Example Application -- Category Feed
'** November 2009
'** Copyright (c) 2009 Roku Inc. All Rights Reserved.
'******************************************************
'******************************************************
' Set up the category feed connection object
' This feed provides details about top level categories
'******************************************************
Function InitCategoryFeedConnection() As Object
conn = CreateObject("roAssociativeArray")
conn.UrlPrefix = "http://xxx.myweb.com/xml/"
conn.UrlCategoryFeed = conn.UrlPrefix + "/categories.xml"
conn.Timer = CreateObject("roTimespan")
conn.LoadCategoryFeed = load_category_feed
conn.GetCategoryNames = get_category_names
print "created feed connection for " + conn.UrlCategoryFeed
return conn
End Function
'*********************************************************
'** Create an array of names representing the children
'** for the current list of categories. This is useful
'** for filling in the filter banner with the names of
'** all the categories at the next level in the hierarchy
'*********************************************************
Function get_category_names(categories As Object) As Dynamic
categoryNames = CreateObject("roArray", 100, true)
for each category in categories.kids
'print category.Title
categoryNames.Push(category.Title)
next
return categoryNames
End Function
'******************************************************************
'** Given a connection object for a category feed, fetch,
'** parse and build the tree for the feed. the results are
'** stored hierarchically with parent/child relationships
'** with a single default node named Root at the root of the tree
'******************************************************************
Function load_category_feed(conn As Object) As Dynamic
http = NewHttp(conn.UrlCategoryFeed)
Dbg("url: ", http.Http.GetUrl())
m.Timer.Mark()
rsp = http.GetToStringWithRetry()
Dbg("Took: ", m.Timer)
m.Timer.Mark()
xml=CreateObject("roXMLElement")
if not xml.Parse(rsp) then
print "Can't parse feed"
return invalid
endif
Dbg("Parse Took: ", m.Timer)
m.Timer.Mark()
if xml.category = invalid then
print "no categories tag"
return invalid
endif
if islist(xml.category) = false then
print "invalid feed body"
return invalid
endif
if xml.category[0].GetName() <> "category" then
print "no initial category tag"
return invalid
endif
topNode = MakeEmptyCatNode()
topNode.Title = "root"
topNode.isapphome = true
print "begin category node parsing"
categories = xml.GetChildElements()
print "number of categories: " + itostr(categories.Count())
for each e in categories
o = ParseCategoryNode(e)
if o <> invalid then
topNode.AddKid(o)
print "added new child node"
else
print "parse returned no child node"
endif
next
Dbg("Traversing: ", m.Timer)
return topNode
End Function
'******************************************************
'MakeEmptyCatNode - use to create top node in the tree
'******************************************************
Function MakeEmptyCatNode() As Object
return init_category_item()
End Function
'***********************************************************
'Given the xml element to an <Category> tag in the category
'feed, walk it and return the top level node to its tree
'***********************************************************
Function ParseCategoryNode(xml As Object) As dynamic
o = init_category_item()
print "ParseCategoryNode: " + xml.GetName()
'PrintXML(xml, 5)
'parse the curent node to determine the type. everything except
'special categories are considered normal, others have unique types
if xml.GetName() = "category" then
print "category: " + xml@title + " | " + xml@description
o.Type = "normal"
o.Title = xml@title
o.Description = xml@Description
o.ShortDescriptionLine1 = xml@Title
o.ShortDescriptionLine2 = xml@Description
o.SDPosterURL = xml@sd_img
o.HDPosterURL = xml@hd_img
elseif xml.GetName() = "categoryLeaf" then
o.Type = "normal"
elseif xml.GetName() = "specialCategory" then
if invalid <> xml.GetAttributes() then
for each a in xml.GetAttributes()
if a = "type" then
o.Type = xml.GetAttributes()[a]
print "specialCategory: " + xml@type + "|" + xml@title + " | " + xml@description
o.Title = xml@title
o.Description = xml@Description
o.ShortDescriptionLine1 = xml@Title
o.ShortDescriptionLine2 = xml@Description
o.SDPosterURL = xml@sd_img
o.HDPosterURL = xml@hd_img
endif
next
endif
else
print "ParseCategoryNode skip: " + xml.GetName()
return invalid
endif
'only continue processing if we are dealing with a known type
'if new types are supported, make sure to add them to the list
'and parse them correctly further downstream in the parser
while true
if o.Type = "normal" exit while
if o.Type = "special_category" exit while
print "ParseCategoryNode unrecognized feed type"
return invalid
end while
'get the list of child nodes and recursed
'through everything under the current node
for each e in xml.GetBody()
name = e.GetName()
if name = "category" then
print "category: " + e@title + " [" + e@description + "]"
kid = ParseCategoryNode(e)
kid.Title = e@title
kid.Description = e@Description
kid.ShortDescriptionLine1 = xml@Description
kid.SDPosterURL = xml@sd_img
kid.HDPosterURL = xml@hd_img
o.AddKid(kid)
elseif name = "categoryLeaf" then
print "categoryLeaf: " + e@title + " [" + e@description + "]"
kid = ParseCategoryNode(e)
kid.Title = e@title
kid.Description = e@Description
kid.Feed = e@feed
o.AddKid(kid)
elseif name = "specialCategory" then
print "specialCategory: " + e@title + " [" + e@description + "]"
kid = ParseCategoryNode(e)
kid.Title = e@title
kid.Description = e@Description
kid.sd_img = e@sd_img
kid.hd_img = e@hd_img
kid.Feed = e@feed
o.AddKid(kid)
endif
next
return o
End Function
'******************************************************
'Initialize a Category Item
'******************************************************
Function init_category_item() As Object
o = CreateObject("roAssociativeArray")
o.Title = ""
o.Type = "normal"
o.Description = ""
o.Kids = CreateObject("roArray", 100, true)
o.Parent = invalid
o.Feed = ""
o.IsLeaf = cn_is_leaf
o.AddKid = cn_add_kid
return o
End Function
'********************************************************
'** Helper function for each node, returns true/false
'** indicating that this node is a leaf node in the tree
'********************************************************
Function cn_is_leaf() As Boolean
if m.Kids.Count() > 0 return true
if m.Feed <> "" return false
return true
End Function
'*********************************************************
'** Helper function for each node in the tree to add a
'** new node as a child to this node.
'*********************************************************
Sub cn_add_kid(kid As Object)
if kid = invalid then
print "skipping: attempt to add invalid kid failed"
return
endif
kid.Parent = m
m.Kids.Push(kid)
End Sub
