Passing a variable out of a function

"sdpetersen" wrote:
I've read bits in the Roku documentation that suggest that m.top.movieContent and m.top.findNode("movieContent") are synonymous, however I'm finding that's not true, at least not in terms of scope of the variable.

First, can you help me find a way of assigning dynamic variables that I can access outside of the function?

• add 2 fields, m.top.addFields({inbox: {}, outbox: {}})


• m.top.observerField("inbox", somePort)


• run a message loop waiting for commands getting sent (by assigning) to `inbox`


• do the job and assign the result to `outbox`


• externally, another thread is observing `outbox` and on result arrival, do what it wanted to

<?xml version="1.0" encoding="UTF-8"?>
<component name="Movies" extends="Task">
 <interface>
 <field id="inbox" type="node" />
 </interface>
 <script type="text/brightscript" uri = "pkg:/components/Movies/loadMovies.brs"/>
 </children>
</component>

Sub Init()
    m.navItems = m.top.findNode("Movies")
    m.top.functionName = "loadNavContent"
    m.top.observeField("inbox","loadContent")
End Sub

Sub loadContent()
    m.movies = m.top.inbox
    m.content = m.top.findNode(m.movies.id)
    m.content = m.movies
End Sub

Sub loadNavContent()
    oneRow = APICall("main-navigation") 'Make an API call to fetch the lists of movies you will be loading
    
    movieArray = {}
    for each jsonItem in oneRow
        if jsonItem.DoesExist("api")
            movieArray[jsonItem.id] = loadMovieContent(jsonItem.api) 'Make an API call for each item returned in the "main-navigation" API Call
            
            m.movies = CreateObject("roSGNode", "ContentNode") 
            m.movies = movieArray[jsonItem.id]
            m.movies.id = jsonItem.id
            
            m.top.inbox = m.movies 'Assign the movie Node to the inbox for catching and processing from the main script
        end if
    end for
End Sub

Function APICall(action as string) 'This function retrieves and parses the feed and stores each content item in a ContentNode
    account = [INSERT ACCOUNT TOKEN HERE]
    
    url = CreateObject("roUrlTransfer") 'component used to transfer data to/from remote servers
    url.SetCertificatesFile("common:/certs/ca-bundle.crt")
    url.AddHeader("X-Roku-Reserved-Dev-Id", "")
    url.InitClientCertificates()
    requestUrl = Substitute("https://[YOUR-WEBSITE-HERE]?accountToken={1}&action={0}", action, account)
    url.SetUrl(requestUrl)
    
    rsp = url.GetToString()
    responseJSON = parseJSON(rsp)
    
    responseArray = responseJSON.value
    
    return responseArray
    
End Function

Function loadMovieContent(movieAction as string)
    myMovies = GetMovieFeed(movieAction)
    rows = {}
    myMoviesList = []
    
    for each row in myMovies.keys() '.key() forces the associative array to loop in order
       rowGroup = {
           Title:row
           ContentList:myMovies[row]
       }
       myMoviesList.push(rowGroup)
    end for
    
    return ParseXMLContent(myMoviesList)
End Function

Function GetMovieFeed(callType as string) 'This function retrieves and parses the feed and stores each content item in a ContentNode
    account = [INSERT ACCOUNT TOKEN HERE]
    
    url = CreateObject("roUrlTransfer") 'component used to transfer data to/from remote servers
    url.SetCertificatesFile("common:/certs/ca-bundle.crt")
    url.AddHeader("X-Roku-Reserved-Dev-Id", "")
    url.InitClientCertificates()
    requestUrl = Substitute("https://[YOUR-WEBSITE-HERE]?accountToken={0}&action={1}&group=alpha", account, callType)
    url.SetUrl(requestUrl)
    
    rsp = url.GetToString()
    responseJSON = parseJSON(rsp)
    
    responseArray = responseJSON.value
    
    result = {}
    
    for each row in responseArray
        itemGroup = []
        for each jsonItem in responseArray[row]
            item = {}
            item.ContentType = 1 'Roku Values: 1 = Movie, 2 = Series, 3 = Season, 4 = Episode, 5 = Audio, as per https://sdkdocs.roku.com/display/sdkdoc/Content+Meta-Data
            item.title = jsonItem.title
            item.description = strReplace(jsonItem.description,"<br><br>", chr(10))
            item.Rating = jsonItem.item_rating
            item.NumEpisodes = jsonItem.duration
            item.StarRating = jsonItem.item_rate
            item.Categories = jsonItem.genre
            item.Directors = jsonItem.director
            item.Actors = jsonItem.actors
            item.url = jsonItem.streams.default
            'item.stream = {url : jsonItem.streams.default}
            item.streamFormat = "mp4"
            item.HDPosterURL = jsonItem.poster
            item.HDBackgroundImageUrl = jsonItem.poster1
            
            itemGroup.push(item)
        end for
        result[row] = itemGroup
    end for
    
    return result
    
End Function

Function ParseXMLContent(list As Object) 'Formats content into content nodes so they can be passed into the RowList
    RowItems = createObject("RoSGNode","ContentNode")
    'Content node format for RowList: ContentNode(RowList content) --<Children>-> ContentNodes for each row --<Children>-> ContentNodes for each item in the row)
    for each rowAA in list
        row = createObject("RoSGNode","ContentNode")
        row.Title = rowAA.Title

        for each itemAA in rowAA.ContentList
            item = createObject("RoSGNode","ContentNode")
            item.SetFields(itemAA)
            row.appendChild(item)
        end for
        RowItems.appendChild(row)
    end for
    return RowItems
End Function

'******************************************************
'Replace substrings in a string. Return new string
'******************************************************
Function strReplace(basestr As String, oldsub As String, newsub As String) As String
    newstr = ""

    i = 1
    while i <= Len(basestr)
        x = Instr(i, basestr, oldsub)
        if x = 0 then
            newstr = newstr + Mid(basestr, i)
            exit while
        endif

        if x > i then
            newstr = newstr + Mid(basestr, i, x-i)
            i = x
        endif

        newstr = newstr + newsub
        i = i + Len(oldsub)
    end while

    return newstr
End Function

Sub init()
    
    m.RowList = m.top.findNode("RowList")
    
    m.navigation = CreateObject("roSGNode", "Movies") 'Create API Call and Parsing task node
    m.navigation.control = "RUN" 'Run the task node
    m.navigation.observeField("inbox","movieCollection") 'Listen for changes to the inbox
 
    m.RowList.setFocus(true)
 
End Sub

Sub movieCollection()
    
    m.newMovies = m.navigation.inbox
    m.movies = CreateObject("roSGNode", "ContentNode") 'Create a new node for the movies
    m.movies = m.newMovies
    m.movies.id = m.newMovies.id
    m.top.appendChild(m.movies) 'Add the new movies to the parent node for later use
    m.findMovies = m.top.findNode(m.newMovies.id)
    
End Sub

Function onKeyEvent(key as String, press as Boolean) as Boolean

    'Do some processing to tell it what node to display
    'Example:
    'm.newMovies = m.top.findNode(m.mainNavItems.getChild(m.mainNavItems.buttonFocused).getField("id")) 'Grab the ID of the select navMenu item           
    'm.RowList.content = m.newMovies
    'm.RowList.setFocus(true)

End Function