implemented feed generator

[Rakka.git] / Rakka / Resource / PageEntity.hs

diff --git a/Rakka/Resource/PageEntity.hs b/Rakka/Resource/PageEntity.hs
index 0b5459447419ffab669650e8f08f5bd1c6abe381..efb92162f874808624972730ee430d5a7e867b71 100644 (file)
--- a/Rakka/Resource/PageEntity.hs
+++ b/Rakka/Resource/PageEntity.hs
@@ -10,6 +10,7 @@ import           Control.Arrow.ArrowList
 import           Control.Monad.Trans
 import           Data.Char
 import           Data.Maybe
+import           Data.Time
 import           Network.HTTP.Lucu
 import           Network.HTTP.Lucu.Utils
 import           Network.URI hiding (path)
@@ -19,6 +20,7 @@ import           Rakka.Resource
 import           Rakka.Storage
 import           Rakka.SystemConfig
 import           Rakka.Utils
+import           Rakka.W3CDateTime
 import           Rakka.Wiki.Engine
 import           System.FilePath
 import           Text.XML.HXT.Arrow.Namespace
@@ -76,14 +78,6 @@ handleRedirect env
     = proc redir
     -> returnA -< do mType <- getEntityType
                      case mType of
-                       MIMEType "application" "xhtml+xml" _
-                           -> do BaseURI baseURI <- getSysConf (envSysConf env)
-                                 let uri = mkPageFragmentURI
-                                           baseURI
-                                           (redirDest redir)
-                                           ("Redirect:" ++ redirName redir)
-                                 redirect Found uri
-
                        MIMEType "text" "xml" _
                            -> do setContentType mType
                                  [resultStr] <- liftIO $ runX ( setErrorMsgHandler False fail
@@ -96,7 +90,12 @@ handleRedirect env
                                                               )
                                  output resultStr
 
-                       _   -> fail ("internal error: getEntityType returned " ++ show mType)
+                       _   -> do BaseURI baseURI <- getSysConf (envSysConf env)
+                                 let uri = mkPageFragmentURI
+                                           baseURI
+                                           (redirDest redir)
+                                           ("Redirect:" ++ redirName redir)
+                                 redirect Found uri
 
 
 handleGetEntity :: (ArrowXml a, ArrowChoice a, ArrowIO a) => Environment -> a Page (Resource ())
@@ -113,7 +112,9 @@ handleGetEntity env
                                    0   -> foundTimeStamp (entityLastMod page) -- 0 はデフォルトページ
                                    rev -> foundEntity (strongETag $ show rev) (entityLastMod page)
 
-                        outputXmlPage tree (entityToXHTML env)
+                        outputXmlPage tree [ (MIMEType "application" "xhtml+xml" [], entityToXHTML env)
+                                           , (MIMEType "application" "rdf+xml"   [], entityToRSS   env)
+                                           ]
 
 
 entityToXHTML :: (ArrowXml a, ArrowChoice a, ArrowIO a) => Environment -> a XmlTree XmlTree
@@ -207,6 +208,95 @@ entityToXHTML env
                ) ) -<< page
 
 
+entityToRSS :: (ArrowXml a, ArrowChoice a, ArrowIO a) => Environment -> a XmlTree XmlTree
+entityToRSS env
+    = proc page
+    -> do SiteName   siteName   <- getSysConfA (envSysConf env) -< ()
+          BaseURI    baseURI    <- getSysConfA (envSysConf env) -< ()
+
+          name    <- (getXPathTreesInDoc "/page/@name/text()" >>> getText) -< page
+          summary <- maybeA (getXPathTreesInDoc "/page/summary/text()" >>> getText) -< page
+          pages   <- makePageLinkList (envStorage env) (envSysConf env) (envInterpTable env) -< page
+          
+          ( eelem "/"
+            += ( eelem "rdf:RDF"
+                 += sattr "xmlns"           "http://purl.org/rss/1.0/"
+                 += sattr "xmlns:rdf"       "http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+                 += sattr "xmlns:dc"        "http://purl.org/dc/elements/1.1/"
+                 += sattr "xmlns:trackback" "http://madskills.com/public/xml/rss/module/trackback/"
+                 += ( eelem "channel"
+                      += sattr "rdf:about" (uriToString id (mkRDFURI baseURI name) "")
+                      += ( eelem "title"
+                           += txt siteName
+                           += txt " - "
+                           += getXPathTreesInDoc "/page/@name/text()"
+                         )
+                      += ( eelem "link"
+                           += txt (uriToString id baseURI "")
+                         )
+                      += ( eelem "description"
+                           += txt (case summary of
+                                     Nothing -> "RSS Feed for " ++ siteName
+                                     Just s  -> s)
+                         )
+                      += ( eelem "items"
+                           += ( eelem "rdf:Seq"
+                                += ( constL pages
+                                     >>>
+                                     eelem "rdf:li"
+                                     += attr "resource" (arr (mkPageURIStr baseURI) >>> mkText)
+                                   )
+                              )
+                         )
+                    )
+                 += ( constL pages
+                      >>>
+                      arr (\ n -> (n, Nothing))
+                      >>>
+                      getPageA (envStorage env)
+                      >>>
+                      arr fromJust
+                      >>>
+                      eelem "item"
+                      += attr "rdf:about" (arr (mkPageURIStr baseURI . entityName) >>> mkText)
+                      += ( eelem "title"
+                           += (arr entityName >>> mkText)
+                         )
+                      += ( eelem "link"
+                           += (arr (mkPageURIStr baseURI . entityName) >>> mkText)
+                         )
+                      += ( arrL (\ p -> case entitySummary p of
+                                          Nothing -> []
+                                          Just s  -> [s])
+                           >>>
+                           eelem "description"
+                           += mkText
+                         )
+                      += ( eelem "dc:date"
+                           += ( arrIO (utcToLocalZonedTime . entityLastMod)
+                                >>>
+                                arr formatW3CDateTime
+                                >>>
+                                mkText
+                              )
+                         )
+                      += ( eelem "trackback:ping"
+                           += attr "rdf:resource" (arr (mkTrackbackURIStr baseURI . entityName) >>> mkText)
+                         )
+                    )
+                 >>>
+                 uniqueNamespacesFromDeclAndQNames
+               ) ) -<< page
+    where
+      mkPageURIStr :: URI -> PageName -> String
+      mkPageURIStr baseURI name
+            = uriToString id (mkPageURI baseURI name) ""
+
+      mkTrackbackURIStr :: URI -> PageName -> String
+      mkTrackbackURIStr baseURI name
+            = uriToString id (mkAuxiliaryURI baseURI ["trackback"] name) ""
+
+
 readSubPage :: (ArrowXml a, ArrowChoice a, ArrowIO a) =>
                Environment
             -> a (PageName, Maybe XmlTree, PageName) XmlTree
@@ -238,7 +328,7 @@ handleGetPageListing env
                             )
                        )
                   ) -< (dir, items)
-          returnA -< outputXmlPage tree (pageListingToXHTML env)
+          returnA -< outputXmlPage' tree (pageListingToXHTML env) -- FIXME: rss 對應
 
 
 pageListingToXHTML :: (ArrowXml a, ArrowChoice a, ArrowIO a) => Environment -> a XmlTree XmlTree
@@ -350,7 +440,7 @@ handlePageNotFound env
                        )
                   ) -< name
           returnA -< do setStatus NotFound
-                        outputXmlPage tree (notFoundToXHTML env)
+                        outputXmlPage' tree (notFoundToXHTML env)
 
 
 notFoundToXHTML :: (ArrowXml a, ArrowChoice a, ArrowIO a) => Environment -> a XmlTree XmlTree