{-# OPTIONS -fno-warn-incomplete-patterns #-}

--------------------------------------------------------------------
-- |
-- Module    : Text.Feed.Constructor
-- Copyright : (c) Galois, Inc. 2008,
--             (c) Sigbjorn Finne 2009-
-- License   : BSD3
--
-- Maintainer: Sigbjorn Finne <sof@forkIO.com>
-- Stability : provisional
-- Description: Module for an abstraction layer between different kinds of feeds.
--
--------------------------------------------------------------------
module Text.Feed.Constructor
  ( FeedKind(..)
  , newFeed -- :: FeedKind  -> Feed
  , feedFromRSS -- :: RSS       -> Feed
  , feedFromAtom -- :: Atom.Feed -> Feed
  , feedFromRDF -- :: RSS1.Feed -> Feed
  , feedFromXML -- :: Element   -> Feed
  , getFeedKind -- :: Feed      -> FeedKind
  , FeedSetter -- type _ a = a -> Feed -> Feed
  , addItem -- :: FeedSetter Item
  , withFeedTitle -- :: FeedSetter Text
  , withFeedHome -- :: FeedSetter URLString
  , withFeedHTML -- :: FeedSetter URLString
  , withFeedDescription -- :: FeedSetter Text
  , withFeedPubDate -- :: FeedSetter DateString
  , withFeedLastUpdate -- :: FeedSetter DateString
  , withFeedDate -- :: FeedSetter DateString
  , withFeedLogoLink -- :: FeedSetter URLString
  , withFeedLanguage -- :: FeedSetter Text
  , withFeedCategories -- :: FeedSetter [(Text, Maybe Text)]
  , withFeedGenerator -- :: FeedSetter Text
  , withFeedItems -- :: FeedSetter [Item]
  , newItem -- :: FeedKind   -> Item
  , getItemKind -- :: Item       -> FeedKind
  , atomEntryToItem -- :: Atom.Entry -> Item
  , rssItemToItem -- :: RSS.Item   -> Item
  , rdfItemToItem -- :: RSS1.Item  -> Item
  , ItemSetter -- type _ a = a -> Item -> Item
  , withItemTitle -- :: ItemSetter Text
  , withItemLink -- :: ItemSetter URLString
  , withItemPubDate -- :: ItemSetter DateString
  , withItemDate -- :: ItemSetter DateString
  , withItemAuthor -- :: ItemSetter Text
  , withItemCommentLink -- :: ItemSetter Text
  , withItemEnclosure -- :: Text -> Maybe Text -> ItemSetter Integer
  , withItemFeedLink -- :: Text -> ItemSetter Text
  , withItemId -- :: Bool   -> ItemSetter Text
  , withItemCategories -- :: ItemSetter [(Text, Maybe Text)]
  , withItemDescription -- :: ItemSetter Text
  , withItemRights -- :: ItemSetter Text
  ) where

import Prelude.Compat

import Text.Feed.Types as Feed.Types

import Text.Atom.Feed as Atom
import Text.DublinCore.Types
import Text.RSS.Syntax as RSS
import Text.RSS1.Syntax as RSS1

import Data.XML.Compat
import Data.XML.Types as XML

import Data.Char (toLower)
import Data.Maybe (fromMaybe, mapMaybe)
import Data.Text (Text, pack)

-- ToDo:
--
--  - complete set of constructors over feeds
--  - provide a unified treatment of date string reps.
--    (i.e., I know they differ across formats, but ignorant what
--    the constraints are at the moment.)
-- | Construct an empty feed document, intending to output it in
-- the 'fk' feed format.
newFeed :: FeedKind -> Feed.Types.Feed
newFeed :: FeedKind -> Feed
newFeed FeedKind
fk =
  case FeedKind
fk of
    FeedKind
AtomKind ->
      Feed -> Feed
AtomFeed
        (Text -> TextContent -> Text -> Feed
Atom.nullFeed
           Text
"feed-id-not-filled-in"
           (Text -> TextContent
TextString Text
"dummy-title")
           Text
"dummy-and-bogus-update-date")
    RSSKind Maybe Text
mbV ->
      let def :: RSS
def = Text -> Text -> RSS
RSS.nullRSS Text
"dummy-title" Text
"default-channel-url"
       in RSS -> Feed
RSSFeed (RSS -> Feed) -> RSS -> Feed
forall a b. (a -> b) -> a -> b
$ RSS -> (Text -> RSS) -> Maybe Text -> RSS
forall b a. b -> (a -> b) -> Maybe a -> b
maybe RSS
def (\Text
v -> RSS
def {rssVersion :: Text
RSS.rssVersion = Text
v}) Maybe Text
mbV
    RDFKind Maybe Text
mbV ->
      let def :: Feed
def = Text -> Text -> Feed
RSS1.nullFeed Text
"default-channel-url" Text
"dummy-title"
       in Feed -> Feed
RSS1Feed (Feed -> Feed) -> Feed -> Feed
forall a b. (a -> b) -> a -> b
$ Feed -> (Text -> Feed) -> Maybe Text -> Feed
forall b a. b -> (a -> b) -> Maybe a -> b
maybe Feed
def (\Text
v -> Feed
def {feedVersion :: Text
RSS1.feedVersion = Text
v}) Maybe Text
mbV

feedFromRSS :: RSS.RSS -> Feed.Types.Feed
feedFromRSS :: RSS -> Feed
feedFromRSS = RSS -> Feed
RSSFeed

feedFromAtom :: Atom.Feed -> Feed.Types.Feed
feedFromAtom :: Feed -> Feed
feedFromAtom = Feed -> Feed
AtomFeed

feedFromRDF :: RSS1.Feed -> Feed.Types.Feed
feedFromRDF :: Feed -> Feed
feedFromRDF = Feed -> Feed
RSS1Feed

feedFromXML :: XML.Element -> Feed.Types.Feed
feedFromXML :: Element -> Feed
feedFromXML = Element -> Feed
XMLFeed

getFeedKind :: Feed.Types.Feed -> FeedKind
getFeedKind :: Feed -> FeedKind
getFeedKind Feed
f =
  case Feed
f of
    Feed.Types.AtomFeed {} -> FeedKind
AtomKind
    Feed.Types.RSSFeed RSS
r ->
      Maybe Text -> FeedKind
RSSKind
        (case RSS -> Text
RSS.rssVersion RSS
r of
           Text
"2.0" -> Maybe Text
forall a. Maybe a
Nothing
           Text
v -> Text -> Maybe Text
forall a. a -> Maybe a
Just Text
v)
    Feed.Types.RSS1Feed Feed
r ->
      Maybe Text -> FeedKind
RDFKind
        (case Feed -> Text
RSS1.feedVersion Feed
r of
           Text
"1.0" -> Maybe Text
forall a. Maybe a
Nothing
           Text
v -> Text -> Maybe Text
forall a. a -> Maybe a
Just Text
v)
    Feed.Types.XMLFeed {} -> Maybe Text -> FeedKind
RSSKind (Text -> Maybe Text
forall a. a -> Maybe a
Just Text
"2.0") -- for now, just a hunch..

addItem :: Feed.Types.Item -> Feed.Types.Feed -> Feed.Types.Feed
addItem :: Item -> Feed -> Feed
addItem Item
it Feed
f =
  case (Item
it, Feed
f) of
    (Feed.Types.AtomItem Entry
e, Feed.Types.AtomFeed Feed
fe) ->
      Feed -> Feed
Feed.Types.AtomFeed Feed
fe {feedEntries :: [Entry]
Atom.feedEntries = Entry
e Entry -> [Entry] -> [Entry]
forall a. a -> [a] -> [a]
: Feed -> [Entry]
Atom.feedEntries Feed
fe}
    (Feed.Types.RSSItem RSSItem
e, Feed.Types.RSSFeed RSS
r) ->
      RSS -> Feed
Feed.Types.RSSFeed
        RSS
r {rssChannel :: RSSChannel
RSS.rssChannel = (RSS -> RSSChannel
RSS.rssChannel RSS
r) {rssItems :: [RSSItem]
RSS.rssItems = RSSItem
e RSSItem -> [RSSItem] -> [RSSItem]
forall a. a -> [a] -> [a]
: RSSChannel -> [RSSItem]
RSS.rssItems (RSS -> RSSChannel
RSS.rssChannel RSS
r)}}
    (Feed.Types.RSS1Item Item
e, Feed.Types.RSS1Feed Feed
r)
         -- note: do not update the channel item URIs at this point;
         -- will delay doing so until serialization.
     -> Feed -> Feed
Feed.Types.RSS1Feed Feed
r {feedItems :: [Item]
RSS1.feedItems = Item
e Item -> [Item] -> [Item]
forall a. a -> [a] -> [a]
: Feed -> [Item]
RSS1.feedItems Feed
r}
    (Item, Feed)
_ ->
      [Char] -> Feed
forall a. HasCallStack => [Char] -> a
error [Char]
"addItem: currently unable to automatically convert items from one feed type to another"

withFeedItems :: FeedSetter [Feed.Types.Item]
withFeedItems :: FeedSetter [Item]
withFeedItems [Item]
is Feed
fe =
  (Item -> Feed -> Feed) -> Feed -> [Item] -> Feed
forall a b. (a -> b -> b) -> b -> [a] -> b
forall (t :: * -> *) a b.
Foldable t =>
(a -> b -> b) -> b -> t a -> b
foldr
    Item -> Feed -> Feed
addItem
    (case Feed
fe of
       Feed.Types.AtomFeed Feed
f -> Feed -> Feed
Feed.Types.AtomFeed Feed
f {feedEntries :: [Entry]
Atom.feedEntries = []}
       Feed.Types.RSSFeed RSS
f -> RSS -> Feed
Feed.Types.RSSFeed RSS
f {rssChannel :: RSSChannel
rssChannel = (RSS -> RSSChannel
rssChannel RSS
f) {rssItems :: [RSSItem]
rssItems = []}}
       Feed.Types.RSS1Feed Feed
f -> Feed -> Feed
Feed.Types.RSS1Feed Feed
f {feedItems :: [Item]
feedItems = []})
    [Item]
is

newItem :: FeedKind -> Feed.Types.Item
newItem :: FeedKind -> Item
newItem FeedKind
fk =
  case FeedKind
fk of
    FeedKind
AtomKind ->
      Entry -> Item
Feed.Types.AtomItem (Entry -> Item) -> Entry -> Item
forall a b. (a -> b) -> a -> b
$
      Text -> TextContent -> Text -> Entry
Atom.nullEntry
        Text
"entry-id-not-filled-in"
        (Text -> TextContent
TextString Text
"dummy-entry-title")
        Text
"dummy-and-bogus-entry-update-date"
    RSSKind {} -> RSSItem -> Item
Feed.Types.RSSItem (RSSItem -> Item) -> RSSItem -> Item
forall a b. (a -> b) -> a -> b
$ Text -> RSSItem
RSS.nullItem Text
"dummy-rss-item-title"
    RDFKind {} ->
      Item -> Item
Feed.Types.RSS1Item (Item -> Item) -> Item -> Item
forall a b. (a -> b) -> a -> b
$ Text -> Text -> Text -> Item
RSS1.nullItem Text
"dummy-item-uri" Text
"dummy-item-title" Text
"dummy-item-link"

getItemKind :: Feed.Types.Item -> FeedKind
getItemKind :: Item -> FeedKind
getItemKind Item
f =
  case Item
f of
    Feed.Types.AtomItem {} -> FeedKind
AtomKind
    Feed.Types.RSSItem {} -> Maybe Text -> FeedKind
RSSKind (Text -> Maybe Text
forall a. a -> Maybe a
Just Text
"2.0") -- good guess..
    Feed.Types.RSS1Item {} -> Maybe Text -> FeedKind
RDFKind (Text -> Maybe Text
forall a. a -> Maybe a
Just Text
"1.0")
    Feed.Types.XMLItem {} -> Maybe Text -> FeedKind
RSSKind (Text -> Maybe Text
forall a. a -> Maybe a
Just Text
"2.0")

type FeedSetter a = a -> Feed.Types.Feed -> Feed.Types.Feed

withFeedTitle :: FeedSetter Text
withFeedTitle :: FeedSetter Text
withFeedTitle Text
tit Feed
fe =
  case Feed
fe of
    Feed.Types.AtomFeed Feed
f -> Feed -> Feed
Feed.Types.AtomFeed Feed
f {feedTitle :: TextContent
feedTitle = Text -> TextContent
TextString Text
tit}
    Feed.Types.RSSFeed RSS
f -> RSS -> Feed
Feed.Types.RSSFeed RSS
f {rssChannel :: RSSChannel
rssChannel = (RSS -> RSSChannel
rssChannel RSS
f) {rssTitle :: Text
rssTitle = Text
tit}}
    Feed.Types.RSS1Feed Feed
f ->
      Feed -> Feed
Feed.Types.RSS1Feed Feed
f {feedChannel :: Channel
feedChannel = (Feed -> Channel
feedChannel Feed
f) {channelTitle :: Text
channelTitle = Text
tit}}
    Feed.Types.XMLFeed Element
f ->
      Element -> Feed
Feed.Types.XMLFeed (Element -> Feed) -> Element -> Feed
forall a b. (a -> b) -> a -> b
$
      (Element -> Maybe Element) -> Element -> Element
mapMaybeChildren
        (\Element
e ->
           if Element -> Name
elementName Element
e Name -> Name -> Bool
forall a. Eq a => a -> a -> Bool
== Name
"channel"
             then Element -> Maybe Element
forall a. a -> Maybe a
Just
                    ((Element -> Maybe Element) -> Element -> Element
mapMaybeChildren
                       (\Element
e2 ->
                          if Element -> Name
elementName Element
e2 Name -> Name -> Bool
forall a. Eq a => a -> a -> Bool
== Name
"title"
                            then Element -> Maybe Element
forall a. a -> Maybe a
Just (Name -> Text -> Element
forall t. ToNode t => Name -> t -> Element
unode Name
"title" Text
tit)
                            else Maybe Element
forall a. Maybe a
Nothing)
                       Element
e)
             else Maybe Element
forall a. Maybe a
Nothing)
        Element
f

withFeedHome :: FeedSetter URLString
withFeedHome :: FeedSetter Text
withFeedHome Text
url Feed
fe =
  case Feed
fe of
    Feed.Types.AtomFeed Feed
f -> Feed -> Feed
Feed.Types.AtomFeed Feed
f {feedLinks :: [Link]
feedLinks = Link
newSelf Link -> [Link] -> [Link]
forall a. a -> [a] -> [a]
: Feed -> [Link]
Atom.feedLinks Feed
f}
      -- ToDo: fix, the <link> element is for the HTML home of the channel, not the
      -- location of the feed itself. Struggling to find if there is a common way
      -- to represent this outside of RSS 2.0 standard elements..
    Feed.Types.RSSFeed RSS
f -> RSS -> Feed
Feed.Types.RSSFeed RSS
f {rssChannel :: RSSChannel
rssChannel = (RSS -> RSSChannel
rssChannel RSS
f) {rssLink :: Text
rssLink = Text
url}}
    Feed.Types.RSS1Feed Feed
f ->
      Feed -> Feed
Feed.Types.RSS1Feed Feed
f {feedChannel :: Channel
feedChannel = (Feed -> Channel
feedChannel Feed
f) {channelURI :: Text
channelURI = Text
url}}
    Feed.Types.XMLFeed Element
f ->
      Element -> Feed
Feed.Types.XMLFeed (Element -> Feed) -> Element -> Feed
forall a b. (a -> b) -> a -> b
$
      (Element -> Maybe Element) -> Element -> Element
mapMaybeChildren
        (\Element
e ->
           if Element -> Name
elementName Element
e Name -> Name -> Bool
forall a. Eq a => a -> a -> Bool
== Name
"channel"
             then Element -> Maybe Element
forall a. a -> Maybe a
Just
                    ((Element -> Maybe Element) -> Element -> Element
mapMaybeChildren
                       (\Element
e2 ->
                          if Element -> Name
elementName Element
e2 Name -> Name -> Bool
forall a. Eq a => a -> a -> Bool
== Name
"link"
                            then Element -> Maybe Element
forall a. a -> Maybe a
Just (Name -> Text -> Element
forall t. ToNode t => Name -> t -> Element
unode Name
"link" Text
url)
                            else Maybe Element
forall a. Maybe a
Nothing)
                       Element
e)
             else Maybe Element
forall a. Maybe a
Nothing)
        Element
f
  where
    newSelf :: Link
newSelf = (Text -> Link
nullLink Text
url) {linkRel :: Maybe (Either Text Text)
linkRel = Either Text Text -> Maybe (Either Text Text)
forall a. a -> Maybe a
Just (Text -> Either Text Text
forall a b. a -> Either a b
Left Text
"self"), linkType :: Maybe Text
linkType = Text -> Maybe Text
forall a. a -> Maybe a
Just Text
"application/atom+xml"}

-- | 'withFeedHTML' sets the URL where an HTML version of the
-- feed is published.
withFeedHTML :: FeedSetter URLString
withFeedHTML :: FeedSetter Text
withFeedHTML Text
url Feed
fe =
  case Feed
fe of
    Feed.Types.AtomFeed Feed
f -> Feed -> Feed
Feed.Types.AtomFeed Feed
f {feedLinks :: [Link]
feedLinks = Link
newAlt Link -> [Link] -> [Link]
forall a. a -> [a] -> [a]
: Feed -> [Link]
Atom.feedLinks Feed
f}
    Feed.Types.RSSFeed RSS
f -> RSS -> Feed
Feed.Types.RSSFeed RSS
f {rssChannel :: RSSChannel
rssChannel = (RSS -> RSSChannel
rssChannel RSS
f) {rssLink :: Text
rssLink = Text
url}}
    Feed.Types.RSS1Feed Feed
f ->
      Feed -> Feed
Feed.Types.RSS1Feed Feed
f {feedChannel :: Channel
feedChannel = (Feed -> Channel
feedChannel Feed
f) {channelLink :: Text
channelLink = Text
url}}
    Feed.Types.XMLFeed Element
f ->
      Element -> Feed
Feed.Types.XMLFeed (Element -> Feed) -> Element -> Feed
forall a b. (a -> b) -> a -> b
$
      (Element -> Maybe Element) -> Element -> Element
mapMaybeChildren
        (\Element
e ->
           if Element -> Name
elementName Element
e Name -> Name -> Bool
forall a. Eq a => a -> a -> Bool
== Name
"channel"
             then Element -> Maybe Element
forall a. a -> Maybe a
Just
                    ((Element -> Maybe Element) -> Element -> Element
mapMaybeChildren
                       (\Element
e2 ->
                          if Element -> Name
elementName Element
e2 Name -> Name -> Bool
forall a. Eq a => a -> a -> Bool
== Name
"link"
                            then Element -> Maybe Element
forall a. a -> Maybe a
Just (Name -> Text -> Element
forall t. ToNode t => Name -> t -> Element
unode Name
"link" Text
url)
                            else Maybe Element
forall a. Maybe a
Nothing)
                       Element
e)
             else Maybe Element
forall a. Maybe a
Nothing)
        Element
f
  where
    newAlt :: Link
newAlt = (Text -> Link
nullLink Text
url) {linkRel :: Maybe (Either Text Text)
linkRel = Either Text Text -> Maybe (Either Text Text)
forall a. a -> Maybe a
Just (Text -> Either Text Text
forall a b. a -> Either a b
Left Text
"alternate"), linkType :: Maybe Text
linkType = Text -> Maybe Text
forall a. a -> Maybe a
Just Text
"text/html"}

-- | 'withFeedHTML' sets the URL where an HTML version of the
-- feed is published.
withFeedDescription :: FeedSetter Text
withFeedDescription :: FeedSetter Text
withFeedDescription Text
desc Feed
fe =
  case Feed
fe of
    Feed.Types.AtomFeed Feed
f -> Feed -> Feed
Feed.Types.AtomFeed Feed
f {feedSubtitle :: Maybe TextContent
feedSubtitle = TextContent -> Maybe TextContent
forall a. a -> Maybe a
Just (Text -> TextContent
TextString Text
desc)}
    Feed.Types.RSSFeed RSS
f ->
      RSS -> Feed
Feed.Types.RSSFeed RSS
f {rssChannel :: RSSChannel
rssChannel = (RSS -> RSSChannel
rssChannel RSS
f) {rssDescription :: Text
rssDescription = Text
desc}}
    Feed.Types.RSS1Feed Feed
f ->
      Feed -> Feed
Feed.Types.RSS1Feed Feed
f {feedChannel :: Channel
feedChannel = (Feed -> Channel
feedChannel Feed
f) {channelDesc :: Text
channelDesc = Text
desc}}
    Feed.Types.XMLFeed Element
f ->
      Element -> Feed
Feed.Types.XMLFeed (Element -> Feed) -> Element -> Feed
forall a b. (a -> b) -> a -> b
$
      (Element -> Maybe Element) -> Element -> Element
mapMaybeChildren
        (\Element
e ->
           if Element -> Name
elementName Element
e Name -> Name -> Bool
forall a. Eq a => a -> a -> Bool
== Name
"channel"
             then Element -> Maybe Element
forall a. a -> Maybe a
Just
                    ((Element -> Maybe Element) -> Element -> Element
mapMaybeChildren
                       (\Element
e2 ->
                          if Element -> Name
elementName Element
e2 Name -> Name -> Bool
forall a. Eq a => a -> a -> Bool
== Name
"description"
                            then Element -> Maybe Element
forall a. a -> Maybe a
Just (Name -> Text -> Element
forall t. ToNode t => Name -> t -> Element
unode Name
"description" Text
desc)
                            else Maybe Element
forall a. Maybe a
Nothing)
                       Element
e)
             else Maybe Element
forall a. Maybe a
Nothing)
        Element
f

withFeedPubDate :: FeedSetter Text
withFeedPubDate :: FeedSetter Text
withFeedPubDate Text
dateStr Feed
fe =
  case Feed
fe of
    Feed.Types.AtomFeed Feed
f -> Feed -> Feed
Feed.Types.AtomFeed Feed
f {feedUpdated :: Text
feedUpdated = Text
dateStr}
    Feed.Types.RSSFeed RSS
f ->
      RSS -> Feed
Feed.Types.RSSFeed RSS
f {rssChannel :: RSSChannel
rssChannel = (RSS -> RSSChannel
rssChannel RSS
f) {rssPubDate :: Maybe Text
rssPubDate = Text -> Maybe Text
forall a. a -> Maybe a
Just Text
dateStr}}
    Feed.Types.RSS1Feed Feed
f ->
      Feed -> Feed
Feed.Types.RSS1Feed (Feed -> Feed) -> Feed -> Feed
forall a b. (a -> b) -> a -> b
$
      case (DCItem -> Bool) -> [DCItem] -> ([DCItem], [DCItem])
forall a. (a -> Bool) -> [a] -> ([a], [a])
break DCItem -> Bool
isDate ([DCItem] -> ([DCItem], [DCItem]))
-> [DCItem] -> ([DCItem], [DCItem])
forall a b. (a -> b) -> a -> b
$ Channel -> [DCItem]
RSS1.channelDC (Feed -> Channel
RSS1.feedChannel Feed
f) of
        ([DCItem]
as, DCItem
dci:[DCItem]
bs) ->
          Feed
f
            { feedChannel :: Channel
RSS1.feedChannel =
                (Feed -> Channel
RSS1.feedChannel Feed
f) {channelDC :: [DCItem]
RSS1.channelDC = [DCItem]
as [DCItem] -> [DCItem] -> [DCItem]
forall a. [a] -> [a] -> [a]
++ DCItem
dci {dcText :: Text
dcText = Text
dateStr} DCItem -> [DCItem] -> [DCItem]
forall a. a -> [a] -> [a]
: [DCItem]
bs}
            }
        ([DCItem]
_, []) ->
          Feed
f
            { feedChannel :: Channel
RSS1.feedChannel =
                (Feed -> Channel
RSS1.feedChannel Feed
f)
                  { channelDC :: [DCItem]
RSS1.channelDC =
                      DCItem {dcElt :: DCInfo
dcElt = DCInfo
DC_Date, dcText :: Text
dcText = Text
dateStr} DCItem -> [DCItem] -> [DCItem]
forall a. a -> [a] -> [a]
:
                      Channel -> [DCItem]
RSS1.channelDC (Feed -> Channel
RSS1.feedChannel Feed
f)
                  }
            }
    Feed.Types.XMLFeed Element
f ->
      Element -> Feed
Feed.Types.XMLFeed (Element -> Feed) -> Element -> Feed
forall a b. (a -> b) -> a -> b
$
      (Element -> Maybe Element) -> Element -> Element
mapMaybeChildren
        (\Element
e ->
           if Element -> Name
elementName Element
e Name -> Name -> Bool
forall a. Eq a => a -> a -> Bool
== Name
"channel"
             then Element -> Maybe Element
forall a. a -> Maybe a
Just
                    ((Element -> Maybe Element) -> Element -> Element
mapMaybeChildren
                       (\Element
e2 ->
                          if Element -> Name
elementName Element
e2 Name -> Name -> Bool
forall a. Eq a => a -> a -> Bool
== Name
"pubDate"
                            then Element -> Maybe Element
forall a. a -> Maybe a
Just (Name -> Text -> Element
forall t. ToNode t => Name -> t -> Element
unode Name
"pubDate" Text
dateStr)
                            else Maybe Element
forall a. Maybe a
Nothing)
                       Element
e)
             else Maybe Element
forall a. Maybe a
Nothing)
        Element
f
  where
    isDate :: DCItem -> Bool
isDate DCItem
dc = DCItem -> DCInfo
dcElt DCItem
dc DCInfo -> DCInfo -> Bool
forall a. Eq a => a -> a -> Bool
== DCInfo
DC_Date

withFeedLastUpdate :: FeedSetter DateString
withFeedLastUpdate :: FeedSetter Text
withFeedLastUpdate Text
dateStr Feed
fe =
  case Feed
fe of
    Feed.Types.AtomFeed Feed
f -> Feed -> Feed
Feed.Types.AtomFeed Feed
f {feedUpdated :: Text
feedUpdated = Text
dateStr}
    Feed.Types.RSSFeed RSS
f ->
      RSS -> Feed
Feed.Types.RSSFeed RSS
f {rssChannel :: RSSChannel
rssChannel = (RSS -> RSSChannel
rssChannel RSS
f) {rssLastUpdate :: Maybe Text
rssLastUpdate = Text -> Maybe Text
forall a. a -> Maybe a
Just Text
dateStr}}
    Feed.Types.RSS1Feed Feed
f ->
      Feed -> Feed
Feed.Types.RSS1Feed (Feed -> Feed) -> Feed -> Feed
forall a b. (a -> b) -> a -> b
$
      case (DCItem -> Bool) -> [DCItem] -> ([DCItem], [DCItem])
forall a. (a -> Bool) -> [a] -> ([a], [a])
break DCItem -> Bool
isDate ([DCItem] -> ([DCItem], [DCItem]))
-> [DCItem] -> ([DCItem], [DCItem])
forall a b. (a -> b) -> a -> b
$ Channel -> [DCItem]
RSS1.channelDC (Feed -> Channel
RSS1.feedChannel Feed
f) of
        ([DCItem]
as, DCItem
dci:[DCItem]
bs) ->
          Feed
f
            { feedChannel :: Channel
RSS1.feedChannel =
                (Feed -> Channel
RSS1.feedChannel Feed
f) {channelDC :: [DCItem]
RSS1.channelDC = [DCItem]
as [DCItem] -> [DCItem] -> [DCItem]
forall a. [a] -> [a] -> [a]
++ DCItem
dci {dcText :: Text
dcText = Text
dateStr} DCItem -> [DCItem] -> [DCItem]
forall a. a -> [a] -> [a]
: [DCItem]
bs}
            }
        ([DCItem]
_, []) ->
          Feed
f
            { feedChannel :: Channel
RSS1.feedChannel =
                (Feed -> Channel
RSS1.feedChannel Feed
f)
                  { channelDC :: [DCItem]
RSS1.channelDC =
                      DCItem {dcElt :: DCInfo
dcElt = DCInfo
DC_Date, dcText :: Text
dcText = Text
dateStr} DCItem -> [DCItem] -> [DCItem]
forall a. a -> [a] -> [a]
:
                      Channel -> [DCItem]
RSS1.channelDC (Feed -> Channel
RSS1.feedChannel Feed
f)
                  }
            }
    Feed.Types.XMLFeed Element
f ->
      Element -> Feed
Feed.Types.XMLFeed (Element -> Feed) -> Element -> Feed
forall a b. (a -> b) -> a -> b
$
      (Element -> Maybe Element) -> Element -> Element
mapMaybeChildren
        (\Element
e ->
           if Element -> Name
elementName Element
e Name -> Name -> Bool
forall a. Eq a => a -> a -> Bool
== Name
"channel"
             then Element -> Maybe Element
forall a. a -> Maybe a
Just
                    ((Element -> Maybe Element) -> Element -> Element
mapMaybeChildren
                       (\Element
e2 ->
                          if Element -> Name
elementName Element
e2 Name -> Name -> Bool
forall a. Eq a => a -> a -> Bool
== Name
"lastUpdate"
                            then Element -> Maybe Element
forall a. a -> Maybe a
Just (Name -> Text -> Element
forall t. ToNode t => Name -> t -> Element
unode Name
"lastUpdate" Text
dateStr)
                            else Maybe Element
forall a. Maybe a
Nothing)
                       Element
e)
             else Maybe Element
forall a. Maybe a
Nothing)
        Element
f
  where
    isDate :: DCItem -> Bool
isDate DCItem
dc = DCItem -> DCInfo
dcElt DCItem
dc DCInfo -> DCInfo -> Bool
forall a. Eq a => a -> a -> Bool
== DCInfo
DC_Date

-- | 'withFeedDate dt' is the composition of 'withFeedPubDate'
-- and 'withFeedLastUpdate', setting both publication date and
-- last update date to 'dt'. Notice that RSS2.0 is the only format
-- supporting both pub and last-update.
withFeedDate :: FeedSetter DateString
withFeedDate :: FeedSetter Text
withFeedDate Text
dt Feed
f = FeedSetter Text
withFeedPubDate Text
dt (FeedSetter Text
withFeedLastUpdate Text
dt Feed
f)

withFeedLogoLink :: URLString -> FeedSetter URLString
withFeedLogoLink :: Text -> FeedSetter Text
withFeedLogoLink Text
imgURL Text
lnk Feed
fe =
  case Feed
fe of
    Feed.Types.AtomFeed Feed
f ->
      Feed -> Feed
Feed.Types.AtomFeed Feed
f {feedLogo :: Maybe Text
feedLogo = Text -> Maybe Text
forall a. a -> Maybe a
Just Text
imgURL, feedLinks :: [Link]
feedLinks = Link
newSelf Link -> [Link] -> [Link]
forall a. a -> [a] -> [a]
: Feed -> [Link]
Atom.feedLinks Feed
f}
    Feed.Types.RSSFeed RSS
f ->
      RSS -> Feed
Feed.Types.RSSFeed
        RSS
f
          { rssChannel :: RSSChannel
rssChannel =
              (RSS -> RSSChannel
rssChannel RSS
f) {rssImage :: Maybe RSSImage
rssImage = RSSImage -> Maybe RSSImage
forall a. a -> Maybe a
Just (RSSImage -> Maybe RSSImage) -> RSSImage -> Maybe RSSImage
forall a b. (a -> b) -> a -> b
$ Text -> Text -> Text -> RSSImage
RSS.nullImage Text
imgURL (RSSChannel -> Text
rssTitle (RSS -> RSSChannel
rssChannel RSS
f)) Text
lnk}
          }
    Feed.Types.RSS1Feed Feed
f ->
      Feed -> Feed
Feed.Types.RSS1Feed (Feed -> Feed) -> Feed -> Feed
forall a b. (a -> b) -> a -> b
$
      Feed
f
        { feedImage :: Maybe Image
feedImage = Image -> Maybe Image
forall a. a -> Maybe a
Just (Image -> Maybe Image) -> Image -> Maybe Image
forall a b. (a -> b) -> a -> b
$ Text -> Text -> Text -> Image
RSS1.nullImage Text
imgURL (Channel -> Text
RSS1.channelTitle (Feed -> Channel
RSS1.feedChannel Feed
f)) Text
lnk
        , feedChannel :: Channel
feedChannel = (Feed -> Channel
feedChannel Feed
f) {channelImageURI :: Maybe Text
channelImageURI = Text -> Maybe Text
forall a. a -> Maybe a
Just Text
imgURL}
        }
    Feed.Types.XMLFeed Element
f ->
      Element -> Feed
Feed.Types.XMLFeed (Element -> Feed) -> Element -> Feed
forall a b. (a -> b) -> a -> b
$
      (Element -> Maybe Element) -> Element -> Element
mapMaybeChildren
        (\Element
e ->
           if Element -> Name
elementName Element
e Name -> Name -> Bool
forall a. Eq a => a -> a -> Bool
== Name
"channel"
             then Element -> Maybe Element
forall a. a -> Maybe a
Just
                    ((Element -> Maybe Element) -> Element -> Element
mapMaybeChildren
                       (\Element
e2 ->
                          if Element -> Name
elementName Element
e2 Name -> Name -> Bool
forall a. Eq a => a -> a -> Bool
== Name
"image"
                            then Element -> Maybe Element
forall a. a -> Maybe a
Just
                                   (Name -> [Element] -> Element
forall t. ToNode t => Name -> t -> Element
unode
                                      Name
"image"
                                      [Name -> Text -> Element
forall t. ToNode t => Name -> t -> Element
unode Name
"url" Text
imgURL, Name -> Text -> Element
forall t. ToNode t => Name -> t -> Element
unode Name
"title" Text
title, Name -> Text -> Element
forall t. ToNode t => Name -> t -> Element
unode Name
"link" Text
lnk])
                            else Maybe Element
forall a. Maybe a
Nothing)
                       Element
e)
             else Maybe Element
forall a. Maybe a
Nothing)
        Element
f
      where title :: Text
title =
              case (Element -> Maybe Element)
-> Maybe Element -> Maybe (Maybe Element)
forall a b. (a -> b) -> Maybe a -> Maybe b
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap (Name -> Element -> Maybe Element
findChild Name
"title") (Name -> Element -> Maybe Element
findChild Name
"channel" Element
f) of
                Just (Just Element
e1) -> Element -> Text
strContent Element
e1
                Maybe (Maybe Element)
_ -> Text
"feed_title" -- shouldn't happen..
  where
    newSelf :: Link
newSelf = (Text -> Link
nullLink Text
lnk) {linkRel :: Maybe (Either Text Text)
linkRel = Either Text Text -> Maybe (Either Text Text)
forall a. a -> Maybe a
Just (Text -> Either Text Text
forall a b. a -> Either a b
Left Text
"self"), linkType :: Maybe Text
linkType = Text -> Maybe Text
forall a. a -> Maybe a
Just Text
"application/atom+xml"}

withFeedLanguage :: FeedSetter Text
withFeedLanguage :: FeedSetter Text
withFeedLanguage Text
lang Feed
fe =
  case Feed
fe of
    Feed.Types.AtomFeed Feed
f -> Feed -> Feed
Feed.Types.AtomFeed Feed
f {feedAttrs :: [Attr]
Atom.feedAttrs = Attr
langAttr Attr -> [Attr] -> [Attr]
forall a. a -> [a] -> [a]
: Feed -> [Attr]
Atom.feedAttrs Feed
f}
      where langAttr :: Attr
langAttr = (Name
name, [Text -> Content
ContentText Text
lang])
            name :: Name
name = Name {nameLocalName :: Text
nameLocalName = Text
"lang", nameNamespace :: Maybe Text
nameNamespace = Maybe Text
forall a. Maybe a
Nothing, namePrefix :: Maybe Text
namePrefix = Text -> Maybe Text
forall a. a -> Maybe a
Just Text
"xml"}
    Feed.Types.RSSFeed RSS
f ->
      RSS -> Feed
Feed.Types.RSSFeed RSS
f {rssChannel :: RSSChannel
rssChannel = (RSS -> RSSChannel
rssChannel RSS
f) {rssLanguage :: Maybe Text
rssLanguage = Text -> Maybe Text
forall a. a -> Maybe a
Just Text
lang}}
    Feed.Types.RSS1Feed Feed
f ->
      Feed -> Feed
Feed.Types.RSS1Feed (Feed -> Feed) -> Feed -> Feed
forall a b. (a -> b) -> a -> b
$
      case (DCItem -> Bool) -> [DCItem] -> ([DCItem], [DCItem])
forall a. (a -> Bool) -> [a] -> ([a], [a])
break DCItem -> Bool
isLang ([DCItem] -> ([DCItem], [DCItem]))
-> [DCItem] -> ([DCItem], [DCItem])
forall a b. (a -> b) -> a -> b
$ Channel -> [DCItem]
RSS1.channelDC (Feed -> Channel
RSS1.feedChannel Feed
f) of
        ([DCItem]
as, DCItem
dci:[DCItem]
bs) ->
          Feed
f
            { feedChannel :: Channel
RSS1.feedChannel =
                (Feed -> Channel
RSS1.feedChannel Feed
f) {channelDC :: [DCItem]
RSS1.channelDC = [DCItem]
as [DCItem] -> [DCItem] -> [DCItem]
forall a. [a] -> [a] -> [a]
++ DCItem
dci {dcText :: Text
dcText = Text
lang} DCItem -> [DCItem] -> [DCItem]
forall a. a -> [a] -> [a]
: [DCItem]
bs}
            }
        ([DCItem]
_, []) ->
          Feed
f
            { feedChannel :: Channel
RSS1.feedChannel =
                (Feed -> Channel
RSS1.feedChannel Feed
f)
                  { channelDC :: [DCItem]
RSS1.channelDC =
                      DCItem {dcElt :: DCInfo
dcElt = DCInfo
DC_Language, dcText :: Text
dcText = Text
lang} DCItem -> [DCItem] -> [DCItem]
forall a. a -> [a] -> [a]
:
                      Channel -> [DCItem]
RSS1.channelDC (Feed -> Channel
RSS1.feedChannel Feed
f)
                  }
            }
    Feed.Types.XMLFeed Element
f ->
      Element -> Feed
Feed.Types.XMLFeed (Element -> Feed) -> Element -> Feed
forall a b. (a -> b) -> a -> b
$
      (Element -> Maybe Element) -> Element -> Element
mapMaybeChildren
        (\Element
e ->
           if Element -> Name
elementName Element
e Name -> Name -> Bool
forall a. Eq a => a -> a -> Bool
== Name
"channel"
             then Element -> Maybe Element
forall a. a -> Maybe a
Just
                    ((Element -> Maybe Element) -> Element -> Element
mapMaybeChildren
                       (\Element
e2 ->
                          if Element -> Name
elementName Element
e2 Name -> Name -> Bool
forall a. Eq a => a -> a -> Bool
== Name
"language"
                            then Element -> Maybe Element
forall a. a -> Maybe a
Just (Name -> Text -> Element
forall t. ToNode t => Name -> t -> Element
unode Name
"language" Text
lang)
                            else Maybe Element
forall a. Maybe a
Nothing)
                       Element
e)
             else Maybe Element
forall a. Maybe a
Nothing)
        Element
f
  where
    isLang :: DCItem -> Bool
isLang DCItem
dc = DCItem -> DCInfo
dcElt DCItem
dc DCInfo -> DCInfo -> Bool
forall a. Eq a => a -> a -> Bool
== DCInfo
DC_Language

withFeedCategories :: FeedSetter [(Text, Maybe Text)]
withFeedCategories :: FeedSetter [(Text, Maybe Text)]
withFeedCategories [(Text, Maybe Text)]
cats Feed
fe =
  case Feed
fe of
    Feed.Types.AtomFeed Feed
f ->
      Feed -> Feed
Feed.Types.AtomFeed
        Feed
f
          { feedCategories :: [Category]
Atom.feedCategories =
              ((Text, Maybe Text) -> Category)
-> [(Text, Maybe Text)] -> [Category]
forall a b. (a -> b) -> [a] -> [b]
map (\(Text
t, Maybe Text
mb) -> (Text -> Category
Atom.newCategory Text
t) {catScheme :: Maybe Text
Atom.catScheme = Maybe Text
mb}) [(Text, Maybe Text)]
cats [Category] -> [Category] -> [Category]
forall a. [a] -> [a] -> [a]
++ Feed -> [Category]
feedCategories Feed
f
          }
    Feed.Types.RSSFeed RSS
f ->
      RSS -> Feed
Feed.Types.RSSFeed
        RSS
f
          { rssChannel :: RSSChannel
rssChannel =
              (RSS -> RSSChannel
rssChannel RSS
f)
                { rssCategories :: [RSSCategory]
RSS.rssCategories =
                    ((Text, Maybe Text) -> RSSCategory)
-> [(Text, Maybe Text)] -> [RSSCategory]
forall a b. (a -> b) -> [a] -> [b]
map (\(Text
t, Maybe Text
mb) -> (Text -> RSSCategory
RSS.newCategory Text
t) {rssCategoryDomain :: Maybe Text
RSS.rssCategoryDomain = Maybe Text
mb}) [(Text, Maybe Text)]
cats [RSSCategory] -> [RSSCategory] -> [RSSCategory]
forall a. [a] -> [a] -> [a]
++
                    RSSChannel -> [RSSCategory]
RSS.rssCategories (RSS -> RSSChannel
rssChannel RSS
f)
                }
          }
    Feed.Types.RSS1Feed Feed
f ->
      Feed -> Feed
Feed.Types.RSS1Feed
        Feed
f
          { feedChannel :: Channel
feedChannel =
              (Feed -> Channel
feedChannel Feed
f)
                { channelDC :: [DCItem]
RSS1.channelDC =
                    ((Text, Maybe Text) -> DCItem) -> [(Text, Maybe Text)] -> [DCItem]
forall a b. (a -> b) -> [a] -> [b]
map (\(Text
t, Maybe Text
_) -> DCItem {dcElt :: DCInfo
dcElt = DCInfo
DC_Subject, dcText :: Text
dcText = Text
t}) [(Text, Maybe Text)]
cats [DCItem] -> [DCItem] -> [DCItem]
forall a. [a] -> [a] -> [a]
++
                    Channel -> [DCItem]
RSS1.channelDC (Feed -> Channel
feedChannel Feed
f)
                }
          }
    Feed.Types.XMLFeed Element
f ->
      Element -> Feed
Feed.Types.XMLFeed (Element -> Feed) -> Element -> Feed
forall a b. (a -> b) -> a -> b
$
      (Element -> Maybe Element) -> Element -> Element
mapMaybeChildren
        (\Element
e ->
           if Element -> Name
elementName Element
e Name -> Name -> Bool
forall a. Eq a => a -> a -> Bool
== Name
"channel"
             then Element -> Maybe Element
forall a. a -> Maybe a
Just
                    (((Text, Maybe Text) -> Element -> Element)
-> Element -> [(Text, Maybe Text)] -> Element
forall a b. (a -> b -> b) -> b -> [a] -> b
forall (t :: * -> *) a b.
Foldable t =>
(a -> b -> b) -> b -> t a -> b
foldr
                       (\(Text
t, Maybe Text
mb) Element
acc ->
                          Element -> Element -> Element
addChild
                            (Name -> [Attr] -> Element
forall t. ToNode t => Name -> t -> Element
unode
                               Name
"category"
                               ((Attr -> [Attr])
-> (Text -> Attr -> [Attr]) -> Maybe Text -> Attr -> [Attr]
forall b a. b -> (a -> b) -> Maybe a -> b
maybe (Attr -> [Attr] -> [Attr]
forall a. a -> [a] -> [a]
: []) (\Text
v Attr
x -> [Text -> Text -> Attr
mkAttr Text
"domain" Text
v, Attr
x]) Maybe Text
mb (Text -> Text -> Attr
mkAttr Text
"term" Text
t)))
                            Element
acc)
                       Element
e
                       [(Text, Maybe Text)]
cats)
             else Maybe Element
forall a. Maybe a
Nothing)
        Element
f

withFeedGenerator :: FeedSetter (Text, Maybe URLString)
withFeedGenerator :: FeedSetter (Text, Maybe Text)
withFeedGenerator (Text
gen, Maybe Text
mbURI) Feed
fe =
  case Feed
fe of
    Feed.Types.AtomFeed Feed
f ->
      Feed -> Feed
Feed.Types.AtomFeed (Feed -> Feed) -> Feed -> Feed
forall a b. (a -> b) -> a -> b
$
      Feed
f {feedGenerator :: Maybe Generator
Atom.feedGenerator = Generator -> Maybe Generator
forall a. a -> Maybe a
Just ((Text -> Generator
Atom.nullGenerator Text
gen) {genURI :: Maybe Text
Atom.genURI = Maybe Text
mbURI})}
    Feed.Types.RSSFeed RSS
f ->
      RSS -> Feed
Feed.Types.RSSFeed RSS
f {rssChannel :: RSSChannel
rssChannel = (RSS -> RSSChannel
rssChannel RSS
f) {rssGenerator :: Maybe Text
rssGenerator = Text -> Maybe Text
forall a. a -> Maybe a
Just Text
gen}}
    Feed.Types.RSS1Feed Feed
f ->
      Feed -> Feed
Feed.Types.RSS1Feed (Feed -> Feed) -> Feed -> Feed
forall a b. (a -> b) -> a -> b
$
      case (DCItem -> Bool) -> [DCItem] -> ([DCItem], [DCItem])
forall a. (a -> Bool) -> [a] -> ([a], [a])
break DCItem -> Bool
isSource ([DCItem] -> ([DCItem], [DCItem]))
-> [DCItem] -> ([DCItem], [DCItem])
forall a b. (a -> b) -> a -> b
$ Channel -> [DCItem]
RSS1.channelDC (Feed -> Channel
RSS1.feedChannel Feed
f) of
        ([DCItem]
as, DCItem
dci:[DCItem]
bs) ->
          Feed
f
            { feedChannel :: Channel
RSS1.feedChannel =
                (Feed -> Channel
RSS1.feedChannel Feed
f) {channelDC :: [DCItem]
RSS1.channelDC = [DCItem]
as [DCItem] -> [DCItem] -> [DCItem]
forall a. [a] -> [a] -> [a]
++ DCItem
dci {dcText :: Text
dcText = Text
gen} DCItem -> [DCItem] -> [DCItem]
forall a. a -> [a] -> [a]
: [DCItem]
bs}
            }
        ([DCItem]
_, []) ->
          Feed
f
            { feedChannel :: Channel
RSS1.feedChannel =
                (Feed -> Channel
RSS1.feedChannel Feed
f)
                  { channelDC :: [DCItem]
RSS1.channelDC =
                      DCItem {dcElt :: DCInfo
dcElt = DCInfo
DC_Source, dcText :: Text
dcText = Text
gen} DCItem -> [DCItem] -> [DCItem]
forall a. a -> [a] -> [a]
: Channel -> [DCItem]
RSS1.channelDC (Feed -> Channel
RSS1.feedChannel Feed
f)
                  }
            }
    Feed.Types.XMLFeed Element
f ->
      Element -> Feed
Feed.Types.XMLFeed (Element -> Feed) -> Element -> Feed
forall a b. (a -> b) -> a -> b
$
      (Element -> Maybe Element) -> Element -> Element
mapMaybeChildren
        (\Element
e ->
           if Element -> Name
elementName Element
e Name -> Name -> Bool
forall a. Eq a => a -> a -> Bool
== Name
"channel"
             then Element -> Maybe Element
forall a. a -> Maybe a
Just
                    ((Element -> Maybe Element) -> Element -> Element
mapMaybeChildren
                       (\Element
e2 ->
                          if Element -> Name
elementName Element
e2 Name -> Name -> Bool
forall a. Eq a => a -> a -> Bool
== Name
"generator"
                            then Element -> Maybe Element
forall a. a -> Maybe a
Just (Name -> Text -> Element
forall t. ToNode t => Name -> t -> Element
unode Name
"generator" Text
gen)
                            else Maybe Element
forall a. Maybe a
Nothing)
                       Element
e)
             else Maybe Element
forall a. Maybe a
Nothing)
        Element
f
  where
    isSource :: DCItem -> Bool
isSource DCItem
dc = DCItem -> DCInfo
dcElt DCItem
dc DCInfo -> DCInfo -> Bool
forall a. Eq a => a -> a -> Bool
== DCInfo
DC_Source

-- Item constructors (all the way to the end):
atomEntryToItem :: Atom.Entry -> Feed.Types.Item
atomEntryToItem :: Entry -> Item
atomEntryToItem = Entry -> Item
Feed.Types.AtomItem

rssItemToItem :: RSS.RSSItem -> Feed.Types.Item
rssItemToItem :: RSSItem -> Item
rssItemToItem = RSSItem -> Item
Feed.Types.RSSItem

rdfItemToItem :: RSS1.Item -> Feed.Types.Item
rdfItemToItem :: Item -> Item
rdfItemToItem = Item -> Item
Feed.Types.RSS1Item

type ItemSetter a = a -> Feed.Types.Item -> Feed.Types.Item

-- | 'withItemPubDate dt' associates the creation\/ publication date 'dt'
-- with a feed item.
withItemPubDate :: ItemSetter DateString
withItemPubDate :: ItemSetter Text
withItemPubDate Text
dt Item
fi =
  case Item
fi of
    Feed.Types.AtomItem Entry
e -> Entry -> Item
Feed.Types.AtomItem Entry
e {entryUpdated :: Text
Atom.entryUpdated = Text
dt}
    Feed.Types.RSSItem RSSItem
i -> RSSItem -> Item
Feed.Types.RSSItem RSSItem
i {rssItemPubDate :: Maybe Text
RSS.rssItemPubDate = Text -> Maybe Text
forall a. a -> Maybe a
Just Text
dt}
    Feed.Types.RSS1Item Item
i ->
      case (DCItem -> Bool) -> [DCItem] -> ([DCItem], [DCItem])
forall a. (a -> Bool) -> [a] -> ([a], [a])
break DCItem -> Bool
isDate ([DCItem] -> ([DCItem], [DCItem]))
-> [DCItem] -> ([DCItem], [DCItem])
forall a b. (a -> b) -> a -> b
$ Item -> [DCItem]
RSS1.itemDC Item
i of
        ([DCItem]
as, DCItem
dci:[DCItem]
bs) -> Item -> Item
Feed.Types.RSS1Item Item
i {itemDC :: [DCItem]
RSS1.itemDC = [DCItem]
as [DCItem] -> [DCItem] -> [DCItem]
forall a. [a] -> [a] -> [a]
++ DCItem
dci {dcText :: Text
dcText = Text
dt} DCItem -> [DCItem] -> [DCItem]
forall a. a -> [a] -> [a]
: [DCItem]
bs}
        ([DCItem]
_, []) ->
          Item -> Item
Feed.Types.RSS1Item
            Item
i {itemDC :: [DCItem]
RSS1.itemDC = DCItem {dcElt :: DCInfo
dcElt = DCInfo
DC_Date, dcText :: Text
dcText = Text
dt} DCItem -> [DCItem] -> [DCItem]
forall a. a -> [a] -> [a]
: Item -> [DCItem]
RSS1.itemDC Item
i}
    Feed.Types.XMLItem Element
i ->
      Element -> Item
Feed.Types.XMLItem (Element -> Item) -> Element -> Item
forall a b. (a -> b) -> a -> b
$
      Element -> Element -> Element
addChild (Name -> Text -> Element
forall t. ToNode t => Name -> t -> Element
unode Name
"pubDate" Text
dt) (Element -> Element) -> Element -> Element
forall a b. (a -> b) -> a -> b
$ (Element -> Bool) -> Element -> Element
filterChildren (\Element
e -> Element -> Name
elementName Element
e Name -> Name -> Bool
forall a. Eq a => a -> a -> Bool
/= Name
"pubDate") Element
i
  where
    isDate :: DCItem -> Bool
isDate DCItem
dc = DCItem -> DCInfo
dcElt DCItem
dc DCInfo -> DCInfo -> Bool
forall a. Eq a => a -> a -> Bool
== DCInfo
DC_Date

-- | 'withItemDate' is a synonym for 'withItemPubDate'.
withItemDate :: ItemSetter DateString
withItemDate :: ItemSetter Text
withItemDate = ItemSetter Text
withItemPubDate

-- | 'withItemTitle myTitle' associates a new title, 'myTitle',
-- with a feed item.
withItemTitle :: ItemSetter Text
withItemTitle :: ItemSetter Text
withItemTitle Text
tit Item
fi =
  case Item
fi of
    Feed.Types.AtomItem Entry
e -> Entry -> Item
Feed.Types.AtomItem Entry
e {entryTitle :: TextContent
Atom.entryTitle = Text -> TextContent
TextString Text
tit}
    Feed.Types.RSSItem RSSItem
i -> RSSItem -> Item
Feed.Types.RSSItem RSSItem
i {rssItemTitle :: Maybe Text
RSS.rssItemTitle = Text -> Maybe Text
forall a. a -> Maybe a
Just Text
tit}
    Feed.Types.RSS1Item Item
i -> Item -> Item
Feed.Types.RSS1Item Item
i {itemTitle :: Text
RSS1.itemTitle = Text
tit}
    Feed.Types.XMLItem Element
i ->
      Element -> Item
Feed.Types.XMLItem (Element -> Item) -> Element -> Item
forall a b. (a -> b) -> a -> b
$
      Element -> Element -> Element
addChild (Name -> Text -> Element
forall t. ToNode t => Name -> t -> Element
unode Name
"title" Text
tit) (Element -> Element) -> Element -> Element
forall a b. (a -> b) -> a -> b
$ (Element -> Bool) -> Element -> Element
filterChildren (\Element
e -> Element -> Name
elementName Element
e Name -> Name -> Bool
forall a. Eq a => a -> a -> Bool
/= Name
"title") Element
i

-- | 'withItemAuthor auStr' associates new author info
-- with a feed item.
withItemAuthor :: ItemSetter Text
withItemAuthor :: ItemSetter Text
withItemAuthor Text
au Item
fi =
  case Item
fi of
    Feed.Types.AtomItem Entry
e ->
      Entry -> Item
Feed.Types.AtomItem
        Entry
e {entryAuthors :: [Person]
Atom.entryAuthors = [Person
nullPerson {personName :: Text
personName = Text
au, personURI :: Maybe Text
personURI = Text -> Maybe Text
forall a. a -> Maybe a
Just Text
au}]}
    Feed.Types.RSSItem RSSItem
i -> RSSItem -> Item
Feed.Types.RSSItem RSSItem
i {rssItemAuthor :: Maybe Text
RSS.rssItemAuthor = Text -> Maybe Text
forall a. a -> Maybe a
Just Text
au}
    Feed.Types.RSS1Item Item
i ->
      case (DCItem -> Bool) -> [DCItem] -> ([DCItem], [DCItem])
forall a. (a -> Bool) -> [a] -> ([a], [a])
break DCItem -> Bool
isAuthor ([DCItem] -> ([DCItem], [DCItem]))
-> [DCItem] -> ([DCItem], [DCItem])
forall a b. (a -> b) -> a -> b
$ Item -> [DCItem]
RSS1.itemDC Item
i of
        ([DCItem]
as, DCItem
dci:[DCItem]
bs) -> Item -> Item
Feed.Types.RSS1Item Item
i {itemDC :: [DCItem]
RSS1.itemDC = [DCItem]
as [DCItem] -> [DCItem] -> [DCItem]
forall a. [a] -> [a] -> [a]
++ DCItem
dci {dcText :: Text
dcText = Text
au} DCItem -> [DCItem] -> [DCItem]
forall a. a -> [a] -> [a]
: [DCItem]
bs}
        ([DCItem]
_, []) ->
          Item -> Item
Feed.Types.RSS1Item
            Item
i {itemDC :: [DCItem]
RSS1.itemDC = DCItem {dcElt :: DCInfo
dcElt = DCInfo
DC_Creator, dcText :: Text
dcText = Text
au} DCItem -> [DCItem] -> [DCItem]
forall a. a -> [a] -> [a]
: Item -> [DCItem]
RSS1.itemDC Item
i}
    Feed.Types.XMLItem Element
i ->
      Element -> Item
Feed.Types.XMLItem (Element -> Item) -> Element -> Item
forall a b. (a -> b) -> a -> b
$
      Element -> Element -> Element
addChild (Name -> Text -> Element
forall t. ToNode t => Name -> t -> Element
unode Name
"author" Text
au) (Element -> Element) -> Element -> Element
forall a b. (a -> b) -> a -> b
$ (Element -> Bool) -> Element -> Element
filterChildren (\Element
e -> Element -> Name
elementName Element
e Name -> Name -> Bool
forall a. Eq a => a -> a -> Bool
/= Name
"author") Element
i
  where
    isAuthor :: DCItem -> Bool
isAuthor DCItem
dc = DCItem -> DCInfo
dcElt DCItem
dc DCInfo -> DCInfo -> Bool
forall a. Eq a => a -> a -> Bool
== DCInfo
DC_Creator

-- | 'withItemFeedLink name myFeed' associates the parent feed URL 'myFeed'
-- with a feed item. It is labelled as 'name'.
withItemFeedLink :: Text -> ItemSetter Text
withItemFeedLink :: Text -> ItemSetter Text
withItemFeedLink Text
tit Text
url Item
fi =
  case Item
fi of
    Feed.Types.AtomItem Entry
e ->
      Entry -> Item
Feed.Types.AtomItem
        Entry
e
          { entrySource :: Maybe Source
Atom.entrySource =
              Source -> Maybe Source
forall a. a -> Maybe a
Just Source
Atom.nullSource {sourceId :: Maybe Text
sourceId = Text -> Maybe Text
forall a. a -> Maybe a
Just Text
url, sourceTitle :: Maybe TextContent
sourceTitle = TextContent -> Maybe TextContent
forall a. a -> Maybe a
Just (Text -> TextContent
TextString Text
tit)}
          }
    Feed.Types.RSSItem RSSItem
i -> RSSItem -> Item
Feed.Types.RSSItem RSSItem
i {rssItemSource :: Maybe RSSSource
RSS.rssItemSource = RSSSource -> Maybe RSSSource
forall a. a -> Maybe a
Just (Text -> Text -> RSSSource
RSS.nullSource Text
url Text
tit)}
    Feed.Types.RSS1Item Item
i -> Item -> Item
Feed.Types.RSS1Item Item
i {itemTitle :: Text
RSS1.itemTitle = Text
tit}
    Feed.Types.XMLItem Element
i ->
      Element -> Item
Feed.Types.XMLItem (Element -> Item) -> Element -> Item
forall a b. (a -> b) -> a -> b
$
      Element -> Element -> Element
addChild (Name -> ([Attr], Text) -> Element
forall t. ToNode t => Name -> t -> Element
unode Name
"source" ([Text -> Text -> Attr
mkAttr Text
"url" Text
url], Text
tit)) (Element -> Element) -> Element -> Element
forall a b. (a -> b) -> a -> b
$
      (Element -> Bool) -> Element -> Element
filterChildren (\Element
e -> Element -> Name
elementName Element
e Name -> Name -> Bool
forall a. Eq a => a -> a -> Bool
/= Name
"source") Element
i

-- | 'withItemCommentLink url' sets the URL reference to the comment page to 'url'.
withItemCommentLink :: ItemSetter Text
withItemCommentLink :: ItemSetter Text
withItemCommentLink Text
url Item
fi =
  case Item
fi of
    Feed.Types.AtomItem Entry
e ->
      Entry -> Item
Feed.Types.AtomItem
        Entry
e {entryLinks :: [Link]
Atom.entryLinks = ((Text -> Link
nullLink Text
url) {linkRel :: Maybe (Either Text Text)
linkRel = Either Text Text -> Maybe (Either Text Text)
forall a. a -> Maybe a
Just (Text -> Either Text Text
forall a b. a -> Either a b
Left Text
"replies")}) Link -> [Link] -> [Link]
forall a. a -> [a] -> [a]
: Entry -> [Link]
Atom.entryLinks Entry
e}
    Feed.Types.RSSItem RSSItem
i -> RSSItem -> Item
Feed.Types.RSSItem RSSItem
i {rssItemComments :: Maybe Text
RSS.rssItemComments = Text -> Maybe Text
forall a. a -> Maybe a
Just Text
url}
    Feed.Types.RSS1Item Item
i ->
      case (DCItem -> Bool) -> [DCItem] -> ([DCItem], [DCItem])
forall a. (a -> Bool) -> [a] -> ([a], [a])
break DCItem -> Bool
isRel ([DCItem] -> ([DCItem], [DCItem]))
-> [DCItem] -> ([DCItem], [DCItem])
forall a b. (a -> b) -> a -> b
$ Item -> [DCItem]
RSS1.itemDC Item
i of
        ([DCItem]
as, DCItem
dci:[DCItem]
bs) -> Item -> Item
Feed.Types.RSS1Item Item
i {itemDC :: [DCItem]
RSS1.itemDC = [DCItem]
as [DCItem] -> [DCItem] -> [DCItem]
forall a. [a] -> [a] -> [a]
++ DCItem
dci {dcText :: Text
dcText = Text
url} DCItem -> [DCItem] -> [DCItem]
forall a. a -> [a] -> [a]
: [DCItem]
bs}
        ([DCItem]
_, []) ->
          Item -> Item
Feed.Types.RSS1Item
            Item
i {itemDC :: [DCItem]
RSS1.itemDC = DCItem {dcElt :: DCInfo
dcElt = DCInfo
DC_Relation, dcText :: Text
dcText = Text
url} DCItem -> [DCItem] -> [DCItem]
forall a. a -> [a] -> [a]
: Item -> [DCItem]
RSS1.itemDC Item
i}
    Feed.Types.XMLItem Element
i ->
      Element -> Item
Feed.Types.XMLItem (Element -> Item) -> Element -> Item
forall a b. (a -> b) -> a -> b
$
      Element -> Element -> Element
addChild (Name -> Text -> Element
forall t. ToNode t => Name -> t -> Element
unode Name
"comments" Text
url) (Element -> Element) -> Element -> Element
forall a b. (a -> b) -> a -> b
$ (Element -> Bool) -> Element -> Element
filterChildren (\Element
e -> Element -> Name
elementName Element
e Name -> Name -> Bool
forall a. Eq a => a -> a -> Bool
/= Name
"comments") Element
i
  where
    isRel :: DCItem -> Bool
isRel DCItem
dc = DCItem -> DCInfo
dcElt DCItem
dc DCInfo -> DCInfo -> Bool
forall a. Eq a => a -> a -> Bool
== DCInfo
DC_Relation

-- | 'withItemEnclosure url mbTy len' sets the URL reference to the comment page to 'url'.
withItemEnclosure :: Text -> Maybe Text -> ItemSetter (Maybe Integer)
withItemEnclosure :: Text -> Maybe Text -> ItemSetter (Maybe Integer)
withItemEnclosure Text
url Maybe Text
ty Maybe Integer
mb_len Item
fi =
  case Item
fi of
    Feed.Types.AtomItem Entry
e ->
      Entry -> Item
Feed.Types.AtomItem
        Entry
e
          { entryLinks :: [Link]
Atom.entryLinks =
              ((Text -> Link
nullLink Text
url)
                 { linkRel :: Maybe (Either Text Text)
linkRel = Either Text Text -> Maybe (Either Text Text)
forall a. a -> Maybe a
Just (Text -> Either Text Text
forall a b. a -> Either a b
Left Text
"enclosure")
                 , linkType :: Maybe Text
linkType = Maybe Text
ty
                 , linkLength :: Maybe Text
linkLength = (Integer -> Text) -> Maybe Integer -> Maybe Text
forall a b. (a -> b) -> Maybe a -> Maybe b
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap ([Char] -> Text
pack ([Char] -> Text) -> (Integer -> [Char]) -> Integer -> Text
forall b c a. (b -> c) -> (a -> b) -> a -> c
. Integer -> [Char]
forall a. Show a => a -> [Char]
show) Maybe Integer
mb_len
                 }) Link -> [Link] -> [Link]
forall a. a -> [a] -> [a]
:
              Entry -> [Link]
Atom.entryLinks Entry
e
          }
    Feed.Types.RSSItem RSSItem
i ->
      RSSItem -> Item
Feed.Types.RSSItem
        RSSItem
i {rssItemEnclosure :: Maybe RSSEnclosure
RSS.rssItemEnclosure = RSSEnclosure -> Maybe RSSEnclosure
forall a. a -> Maybe a
Just (Text -> Maybe Integer -> Text -> RSSEnclosure
nullEnclosure Text
url Maybe Integer
mb_len (Text -> Maybe Text -> Text
forall a. a -> Maybe a -> a
fromMaybe Text
"text/html" Maybe Text
ty))}
    Feed.Types.RSS1Item Item
i ->
      Item -> Item
Feed.Types.RSS1Item
        Item
i
          { itemContent :: [ContentInfo]
RSS1.itemContent =
              ContentInfo
nullContentInfo {contentURI :: Maybe Text
contentURI = Text -> Maybe Text
forall a. a -> Maybe a
Just Text
url, contentFormat :: Maybe Text
contentFormat = Maybe Text
ty} ContentInfo -> [ContentInfo] -> [ContentInfo]
forall a. a -> [a] -> [a]
: Item -> [ContentInfo]
RSS1.itemContent Item
i
          }
    Feed.Types.XMLItem Element
i ->
      Element -> Item
Feed.Types.XMLItem (Element -> Item) -> Element -> Item
forall a b. (a -> b) -> a -> b
$
      Element -> Element -> Element
addChild
        ((Name -> Text -> Element
forall t. ToNode t => Name -> t -> Element
unode Name
"enclosure" Text
url)
           {elementAttributes :: [Attr]
elementAttributes = [Text -> Text -> Attr
mkAttr Text
"length" Text
"0", Text -> Text -> Attr
mkAttr Text
"type" (Text -> Maybe Text -> Text
forall a. a -> Maybe a -> a
fromMaybe Text
"text/html" Maybe Text
ty)]}) (Element -> Element) -> Element -> Element
forall a b. (a -> b) -> a -> b
$
      (Element -> Bool) -> Element -> Element
filterChildren (\Element
e -> Element -> Name
elementName Element
e Name -> Name -> Bool
forall a. Eq a => a -> a -> Bool
/= Name
"enclosure") Element
i

-- | 'withItemId isURL id' associates new unique identifier with a feed item.
-- If 'isURL' is 'True', then the id is assumed to point to a valid web resource.
withItemId :: Bool -> ItemSetter Text
withItemId :: Bool -> ItemSetter Text
withItemId Bool
isURL Text
idS Item
fi =
  case Item
fi of
    Feed.Types.AtomItem Entry
e -> Entry -> Item
Feed.Types.AtomItem Entry
e {entryId :: Text
Atom.entryId = Text
idS}
    Feed.Types.RSSItem RSSItem
i ->
      RSSItem -> Item
Feed.Types.RSSItem
        RSSItem
i {rssItemGuid :: Maybe RSSGuid
RSS.rssItemGuid = RSSGuid -> Maybe RSSGuid
forall a. a -> Maybe a
Just (Text -> RSSGuid
nullGuid Text
idS) {rssGuidPermanentURL :: Maybe Bool
rssGuidPermanentURL = Bool -> Maybe Bool
forall a. a -> Maybe a
Just Bool
isURL}}
    Feed.Types.RSS1Item Item
i ->
      case (DCItem -> Bool) -> [DCItem] -> ([DCItem], [DCItem])
forall a. (a -> Bool) -> [a] -> ([a], [a])
break DCItem -> Bool
isId ([DCItem] -> ([DCItem], [DCItem]))
-> [DCItem] -> ([DCItem], [DCItem])
forall a b. (a -> b) -> a -> b
$ Item -> [DCItem]
RSS1.itemDC Item
i of
        ([DCItem]
as, DCItem
dci:[DCItem]
bs) -> Item -> Item
Feed.Types.RSS1Item Item
i {itemDC :: [DCItem]
RSS1.itemDC = [DCItem]
as [DCItem] -> [DCItem] -> [DCItem]
forall a. [a] -> [a] -> [a]
++ DCItem
dci {dcText :: Text
dcText = Text
idS} DCItem -> [DCItem] -> [DCItem]
forall a. a -> [a] -> [a]
: [DCItem]
bs}
        ([DCItem]
_, []) ->
          Item -> Item
Feed.Types.RSS1Item
            Item
i {itemDC :: [DCItem]
RSS1.itemDC = DCItem {dcElt :: DCInfo
dcElt = DCInfo
DC_Identifier, dcText :: Text
dcText = Text
idS} DCItem -> [DCItem] -> [DCItem]
forall a. a -> [a] -> [a]
: Item -> [DCItem]
RSS1.itemDC Item
i}
    Feed.Types.XMLItem Element
i ->
      Element -> Item
Feed.Types.XMLItem (Element -> Item) -> Element -> Item
forall a b. (a -> b) -> a -> b
$
      Element -> Element -> Element
addChild (Name -> ([Attr], Text) -> Element
forall t. ToNode t => Name -> t -> Element
unode Name
"guid" ([Text -> Text -> Attr
mkAttr Text
"isPermaLink" (Bool -> Text
forall {a}. Show a => a -> Text
showBool Bool
isURL)], Text
idS)) (Element -> Element) -> Element -> Element
forall a b. (a -> b) -> a -> b
$
      (Element -> Bool) -> Element -> Element
filterChildren (\Element
e -> Element -> Name
elementName Element
e Name -> Name -> Bool
forall a. Eq a => a -> a -> Bool
/= Name
"guid") Element
i
  where
    showBool :: a -> Text
showBool a
x = [Char] -> Text
pack ([Char] -> Text) -> [Char] -> Text
forall a b. (a -> b) -> a -> b
$ (Char -> Char) -> [Char] -> [Char]
forall a b. (a -> b) -> [a] -> [b]
map Char -> Char
toLower (a -> [Char]
forall a. Show a => a -> [Char]
show a
x)
    isId :: DCItem -> Bool
isId DCItem
dc = DCItem -> DCInfo
dcElt DCItem
dc DCInfo -> DCInfo -> Bool
forall a. Eq a => a -> a -> Bool
== DCInfo
DC_Identifier

-- | 'withItemDescription desc' associates a new descriptive string (aka summary)
-- with a feed item.
withItemDescription :: ItemSetter Text
withItemDescription :: ItemSetter Text
withItemDescription Text
desc Item
fi =
  case Item
fi of
    Feed.Types.AtomItem Entry
e -> Entry -> Item
Feed.Types.AtomItem Entry
e {entrySummary :: Maybe TextContent
Atom.entrySummary = TextContent -> Maybe TextContent
forall a. a -> Maybe a
Just (Text -> TextContent
TextString Text
desc)}
    Feed.Types.RSSItem RSSItem
i -> RSSItem -> Item
Feed.Types.RSSItem RSSItem
i {rssItemDescription :: Maybe Text
RSS.rssItemDescription = Text -> Maybe Text
forall a. a -> Maybe a
Just Text
desc}
    Feed.Types.RSS1Item Item
i -> Item -> Item
Feed.Types.RSS1Item Item
i {itemDesc :: Maybe Text
RSS1.itemDesc = Text -> Maybe Text
forall a. a -> Maybe a
Just Text
desc}
    Feed.Types.XMLItem Element
i ->
      Element -> Item
Feed.Types.XMLItem (Element -> Item) -> Element -> Item
forall a b. (a -> b) -> a -> b
$
      Element -> Element -> Element
addChild (Name -> Text -> Element
forall t. ToNode t => Name -> t -> Element
unode Name
"description" Text
desc) (Element -> Element) -> Element -> Element
forall a b. (a -> b) -> a -> b
$ (Element -> Bool) -> Element -> Element
filterChildren (\Element
e -> Element -> Name
elementName Element
e Name -> Name -> Bool
forall a. Eq a => a -> a -> Bool
/= Name
"description") Element
i

-- | 'withItemRights rightStr' associates the rights information 'rightStr'
-- with a feed item.
withItemRights :: ItemSetter Text
withItemRights :: ItemSetter Text
withItemRights Text
desc Item
fi =
  case Item
fi of
    Feed.Types.AtomItem Entry
e -> Entry -> Item
Feed.Types.AtomItem Entry
e {entryRights :: Maybe TextContent
Atom.entryRights = TextContent -> Maybe TextContent
forall a. a -> Maybe a
Just (Text -> TextContent
TextString Text
desc)}
     -- Note: per-item copyright information isn't supported by RSS2.0 (and earlier editions),
     -- you can only attach this at the feed/channel level. So, there's not much we can do
     -- except dropping the information on the floor here. (Rolling our own attribute or
     -- extension element is an option, but would prefer if someone else had started that
     -- effort already.
    Feed.Types.RSSItem {} -> Item
fi
    Feed.Types.RSS1Item Item
i ->
      case (DCItem -> Bool) -> [DCItem] -> ([DCItem], [DCItem])
forall a. (a -> Bool) -> [a] -> ([a], [a])
break ((DCInfo -> DCInfo -> Bool
forall a. Eq a => a -> a -> Bool
== DCInfo
DC_Rights) (DCInfo -> Bool) -> (DCItem -> DCInfo) -> DCItem -> Bool
forall b c a. (b -> c) -> (a -> b) -> a -> c
. DCItem -> DCInfo
dcElt) ([DCItem] -> ([DCItem], [DCItem]))
-> [DCItem] -> ([DCItem], [DCItem])
forall a b. (a -> b) -> a -> b
$ Item -> [DCItem]
RSS1.itemDC Item
i of
        ([DCItem]
as, DCItem
dci:[DCItem]
bs) -> Item -> Item
Feed.Types.RSS1Item Item
i {itemDC :: [DCItem]
RSS1.itemDC = [DCItem]
as [DCItem] -> [DCItem] -> [DCItem]
forall a. [a] -> [a] -> [a]
++ DCItem
dci {dcText :: Text
dcText = Text
desc} DCItem -> [DCItem] -> [DCItem]
forall a. a -> [a] -> [a]
: [DCItem]
bs}
        ([DCItem]
_, []) ->
          Item -> Item
Feed.Types.RSS1Item
            Item
i {itemDC :: [DCItem]
RSS1.itemDC = DCItem {dcElt :: DCInfo
dcElt = DCInfo
DC_Rights, dcText :: Text
dcText = Text
desc} DCItem -> [DCItem] -> [DCItem]
forall a. a -> [a] -> [a]
: Item -> [DCItem]
RSS1.itemDC Item
i}
     -- Since we're so far assuming that a shallow XML rep. of an item
     -- is of RSS2.0 ilk, pinning on the rights info is hard (see above.)
    Feed.Types.XMLItem {} -> Item
fi

-- | 'withItemTitle myLink' associates a new URL, 'myLink',
-- with a feed item.
withItemLink :: ItemSetter URLString
withItemLink :: ItemSetter Text
withItemLink Text
url Item
fi =
  case Item
fi of
    Feed.Types.AtomItem Entry
e ->
      Entry -> Item
Feed.Types.AtomItem Entry
e {entryLinks :: [Link]
Atom.entryLinks = Text -> [Link] -> [Link]
replaceAlternate Text
url (Entry -> [Link]
Atom.entryLinks Entry
e)}
    Feed.Types.RSSItem RSSItem
i -> RSSItem -> Item
Feed.Types.RSSItem RSSItem
i {rssItemLink :: Maybe Text
RSS.rssItemLink = Text -> Maybe Text
forall a. a -> Maybe a
Just Text
url}
    Feed.Types.RSS1Item Item
i -> Item -> Item
Feed.Types.RSS1Item Item
i {itemLink :: Text
RSS1.itemLink = Text
url}
    Feed.Types.XMLItem Element
i ->
      Element -> Item
Feed.Types.XMLItem (Element -> Item) -> Element -> Item
forall a b. (a -> b) -> a -> b
$
      Element -> Element -> Element
addChild (Name -> Text -> Element
forall t. ToNode t => Name -> t -> Element
unode Name
"link" Text
url) (Element -> Element) -> Element -> Element
forall a b. (a -> b) -> a -> b
$ (Element -> Bool) -> Element -> Element
filterChildren (\Element
e -> Element -> Name
elementName Element
e Name -> Name -> Bool
forall a. Eq a => a -> a -> Bool
/= Name
"link") Element
i
  where
    replaceAlternate :: Text -> [Link] -> [Link]
replaceAlternate Text
_ [] = []
    replaceAlternate Text
x (Link
lr:[Link]
xs)
      | Maybe (Either Text Text) -> Text
forall {a}. IsString a => Maybe (Either a a) -> a
toStr (Link -> Maybe (Either Text Text)
Atom.linkRel Link
lr) Text -> Text -> Bool
forall a. Eq a => a -> a -> Bool
== Text
"alternate" = Link
lr {linkHref :: Text
Atom.linkHref = Text
x} Link -> [Link] -> [Link]
forall a. a -> [a] -> [a]
: [Link]
xs
      | Bool
otherwise = Link
lr Link -> [Link] -> [Link]
forall a. a -> [a] -> [a]
: Text -> [Link] -> [Link]
replaceAlternate Text
x [Link]
xs
    toStr :: Maybe (Either a a) -> a
toStr Maybe (Either a a)
Nothing = a
""
    toStr (Just (Left a
x)) = a
x
    toStr (Just (Right a
x)) = a
x

withItemCategories :: ItemSetter [(Text, Maybe Text)]
withItemCategories :: ItemSetter [(Text, Maybe Text)]
withItemCategories [(Text, Maybe Text)]
cats Item
fi =
  case Item
fi of
    Feed.Types.AtomItem Entry
e ->
      Entry -> Item
Feed.Types.AtomItem
        Entry
e
          { entryCategories :: [Category]
Atom.entryCategories =
              ((Text, Maybe Text) -> Category)
-> [(Text, Maybe Text)] -> [Category]
forall a b. (a -> b) -> [a] -> [b]
map (\(Text
t, Maybe Text
mb) -> (Text -> Category
Atom.newCategory Text
t) {catScheme :: Maybe Text
Atom.catScheme = Maybe Text
mb}) [(Text, Maybe Text)]
cats [Category] -> [Category] -> [Category]
forall a. [a] -> [a] -> [a]
++ Entry -> [Category]
entryCategories Entry
e
          }
    Feed.Types.RSSItem RSSItem
i ->
      RSSItem -> Item
Feed.Types.RSSItem
        RSSItem
i
          { rssItemCategories :: [RSSCategory]
RSS.rssItemCategories =
              ((Text, Maybe Text) -> RSSCategory)
-> [(Text, Maybe Text)] -> [RSSCategory]
forall a b. (a -> b) -> [a] -> [b]
map (\(Text
t, Maybe Text
mb) -> (Text -> RSSCategory
RSS.newCategory Text
t) {rssCategoryDomain :: Maybe Text
RSS.rssCategoryDomain = Maybe Text
mb}) [(Text, Maybe Text)]
cats [RSSCategory] -> [RSSCategory] -> [RSSCategory]
forall a. [a] -> [a] -> [a]
++
              RSSItem -> [RSSCategory]
rssItemCategories RSSItem
i
          }
    Feed.Types.RSS1Item Item
i ->
      Item -> Item
Feed.Types.RSS1Item
        Item
i
          { itemDC :: [DCItem]
RSS1.itemDC =
              ((Text, Maybe Text) -> DCItem) -> [(Text, Maybe Text)] -> [DCItem]
forall a b. (a -> b) -> [a] -> [b]
map (\(Text
t, Maybe Text
_) -> DCItem {dcElt :: DCInfo
dcElt = DCInfo
DC_Subject, dcText :: Text
dcText = Text
t}) [(Text, Maybe Text)]
cats [DCItem] -> [DCItem] -> [DCItem]
forall a. [a] -> [a] -> [a]
++ Item -> [DCItem]
RSS1.itemDC Item
i
          }
    Feed.Types.XMLItem Element
i ->
      Element -> Item
Feed.Types.XMLItem (Element -> Item) -> Element -> Item
forall a b. (a -> b) -> a -> b
$
      ((Text, Maybe Text) -> Element -> Element)
-> Element -> [(Text, Maybe Text)] -> Element
forall a b. (a -> b -> b) -> b -> [a] -> b
forall (t :: * -> *) a b.
Foldable t =>
(a -> b -> b) -> b -> t a -> b
foldr
        (\(Text
t, Maybe Text
mb) Element
acc ->
           Element -> Element -> Element
addChild
             (Name -> [Attr] -> Element
forall t. ToNode t => Name -> t -> Element
unode Name
"category" ((Attr -> [Attr])
-> (Text -> Attr -> [Attr]) -> Maybe Text -> Attr -> [Attr]
forall b a. b -> (a -> b) -> Maybe a -> b
maybe (Attr -> [Attr] -> [Attr]
forall a. a -> [a] -> [a]
: []) (\Text
v Attr
x -> [Text -> Text -> Attr
mkAttr Text
"domain" Text
v, Attr
x]) Maybe Text
mb (Text -> Text -> Attr
mkAttr Text
"term" Text
t)))
             Element
acc)
        Element
i
        [(Text, Maybe Text)]
cats

-- helpers..
filterChildren :: (XML.Element -> Bool) -> XML.Element -> XML.Element
filterChildren :: (Element -> Bool) -> Element -> Element
filterChildren Element -> Bool
pre Element
e =
  case Element -> [Node]
elementNodes Element
e of
    [] -> Element
e
    [Node]
cs -> Element
e {elementNodes :: [Node]
elementNodes = (Node -> Maybe Node) -> [Node] -> [Node]
forall a b. (a -> Maybe b) -> [a] -> [b]
mapMaybe Node -> Maybe Node
filterElt [Node]
cs}
  where
    filterElt :: Node -> Maybe Node
filterElt xe :: Node
xe@(XML.NodeElement Element
el)
      | Element -> Bool
pre Element
el = Node -> Maybe Node
forall a. a -> Maybe a
Just Node
xe
      | Bool
otherwise = Maybe Node
forall a. Maybe a
Nothing
    filterElt Node
xe = Node -> Maybe Node
forall a. a -> Maybe a
Just Node
xe

addChild :: XML.Element -> XML.Element -> XML.Element
addChild :: Element -> Element -> Element
addChild Element
a Element
b = Element
b {elementNodes :: [Node]
elementNodes = Element -> Node
XML.NodeElement Element
a Node -> [Node] -> [Node]
forall a. a -> [a] -> [a]
: Element -> [Node]
elementNodes Element
b}

mapMaybeChildren :: (XML.Element -> Maybe XML.Element) -> XML.Element -> XML.Element
mapMaybeChildren :: (Element -> Maybe Element) -> Element -> Element
mapMaybeChildren Element -> Maybe Element
f Element
e =
  case Element -> [Node]
elementNodes Element
e of
    [] -> Element
e
    [Node]
cs -> Element
e {elementNodes :: [Node]
elementNodes = (Node -> Node) -> [Node] -> [Node]
forall a b. (a -> b) -> [a] -> [b]
map Node -> Node
procElt [Node]
cs}
  where
    procElt :: Node -> Node
procElt xe :: Node
xe@(XML.NodeElement Element
el) =
      case Element -> Maybe Element
f Element
el of
        Maybe Element
Nothing -> Node
xe
        Just Element
el1 -> Element -> Node
XML.NodeElement Element
el1
    procElt Node
xe = Node
xe