diff --git a/Entry.hs b/Entry.hs new file mode 100644 --- /dev/null +++ b/Entry.hs @@ -0,0 +1,49 @@ +----------------------------------------------------------------------------- +-- | +-- Module : Entry +-- Copyright : (C) Peter Robinson 2010-2012 +-- License : GPL-2 +-- +-- Maintainer : Peter Robinson +-- Stability : experimental +-- Portability : portable +-- +----------------------------------------------------------------------------- +module Entry +where +import Data.Maybe +import Data.Text.Lazy(Text) +import qualified Data.Text.Lazy as T + +data Entry = Entry + { entryName :: Text + , entryGraduationInfo :: Maybe GraduationInfo + , entryAdvisors :: [(Text,Text)] + } + deriving(Ord,Eq) + +urlAdvisors :: Entry -> [Text] +urlAdvisors = map (T.pack . (++) "http://genealogy.math.ndsu.nodak.edu/" . T.unpack . snd) . entryAdvisors + +data GraduationInfo = GraduationInfo + { gradDegree :: Maybe Text + , gradUniversity :: Maybe Text + , gradYear :: Maybe Text + , gradThesis :: Maybe Text + } + deriving(Ord,Eq) + + +instance Show Entry where + show e = T.unpack (entryName e) + ++ maybeShow (entryGraduationInfo e) + where + maybeShow (Just g) = "\\n" ++ show g + maybeShow Nothing = "" + +instance Show GraduationInfo where + show g = maybeShow (gradDegree g) " " ++ maybeShow (gradUniversity g) ", " + ++ maybeShow (gradYear g) "\\n" ++ maybeShow (gradThesis g) "" + where + maybeShow gi s = if isJust gi then T.unpack (fromJust gi) ++ s else "" + diff --git a/Extract.hs b/Extract.hs new file mode 100644 --- /dev/null +++ b/Extract.hs @@ -0,0 +1,125 @@ +----------------------------------------------------------------------------- +-- | +-- Module : Extract +-- Copyright : (C) Peter Robinson 2010-2012 +-- License : GPL-2 +-- +-- Maintainer : Peter Robinson +-- Stability : experimental +-- Portability : portable +-- +-- Functions for retrieving data from the mathematics genealogy project. +-- +----------------------------------------------------------------------------- +module Extract +where +import Network.HTTP +import Text.HTML.TagSoup +import Control.Monad +import Control.Exception +import Data.Char(isSpace) +import Data.Maybe +import Data.Text.Lazy(Text) +import Data.Text.Lazy.Encoding +import qualified Data.Text.Lazy as T +import qualified Data.ByteString.Lazy.Char8 as B +import Control.Applicative + +import Entry + +openURL x = return . T.pack =<< getResponseBody =<< simpleHTTP (getRequest x) + +getTags :: Text -> IO [Tag Text] +getTags url = parseTags <$> openURL (T.unpack url) + +parseEntry :: [Tag Text] + -> Entry +parseEntry tags = + Entry (scientist tags) + (graduationInfo tags) + (advisors tags) + +scientist :: [Tag Text] -> Text +scientist tags = + let TagText sc = removeClutter $ head $ tail $ head $ sections (~== "

Maybe GraduationInfo +graduationInfo tags = + let offset = head $ sections (~== "") tags + getTag i = notEmptyMaybeTagText $ removeClutter $ offset !! i + degree = getTag 1 + univ = getTag 3 + year = getTag 5 + diss = getTag 18 + in matchLen offset degree univ year diss + where + matchLen offset degree univ year diss + | length offset >= 19 = Just $ GraduationInfo degree univ year diss + | length offset >= 6 = Just $ GraduationInfo degree univ year Nothing + | length offset >= 4 = Just $ GraduationInfo degree univ Nothing Nothing + | length offset >= 2 = Just $ GraduationInfo degree Nothing Nothing Nothing + | otherwise = Nothing + +advisors :: [Tag Text] -> [(Text,Text)] +advisors tags = + let offset = sections (~== "

") tags + offset2 = sections (~== "

") + tags + getTag :: Int -> [[Tag Text]] -> Maybe Text + getTag _ [] = Nothing + getTag i off = + let tag = removeClutter $ flip (!!) i $ head off in + case tag of + TagText t -> maybeAdv $ notEmptyMaybeTagText $ + TagText (decodeUtf8 $ B.pack $ T.unpack t) + _ -> Nothing + + getLink :: Int -> [[Tag Text]] -> Maybe Text + getLink _ [] = Nothing + getLink i off = maybeLink $ flip (!!) (i-1) $ head off + in + if null offset2 + then catMaybes' [(getTag 1 offset,getLink 1 offset)] + else catMaybes' [ (getTag i offset2,getLink i offset2) | i <- [3,8] ] + where + -- TODO: rewrite + catMaybes' :: [(Maybe a,Maybe b)] -> [(a,b)] + catMaybes' [] = [] + catMaybes' ((Just a,Just l):xs) = (a,l) : catMaybes' xs + catMaybes' ((Just a,Nothing):xs)= catMaybes' xs + catMaybes' ((Nothing,_):xs) = catMaybes' xs + + maybeAdv adv@(Just t) + | T.unpack t == "Advisor: Unknown" = Nothing + | otherwise = adv + maybeAdv a = a + + maybeLink t + | isTagOpenName (T.pack "a") t = Just $ fromAttrib (T.pack "href") t + | otherwise = Nothing + + +notEmptyMaybeTagText :: Tag Text -> Maybe Text +notEmptyMaybeTagText (TagText t) + | all isSpace (T.unpack t) = Nothing + | T.null t = Nothing + | otherwise = Just t +notEmptyMaybeTagText _ = Nothing + +-- | Removes preceding, trailing and multiple inter-word spaces: +removeClutter :: Tag Text -> Tag Text +removeClutter (TagText s) = + TagText $ removeInterSpaces (T.strip s) + where + removeInterSpaces :: Text -> Text + removeInterSpaces t = + let (first,rest) = T.breakOn (T.pack " ") t in + if T.null first + then rest + else if T.null rest + then first + else removeInterSpaces $ first `T.append` T.tail rest +removeClutter t = t + diff --git a/Graph.hs b/Graph.hs new file mode 100644 --- /dev/null +++ b/Graph.hs @@ -0,0 +1,47 @@ +----------------------------------------------------------------------------- +-- | +-- Module : Graph +-- Copyright : (C) Peter Robinson 2010-2012 +-- License : GPL-2 +-- +-- Maintainer : Peter Robinson +-- Stability : experimental +-- Portability : portable +-- +----------------------------------------------------------------------------- +module Graph +where +import qualified Data.Map as M +import Data.Graph.Inductive +import Data.Text.Lazy(Text) +import qualified Data.Text.Lazy as T +import Entry + +-- | Maps scientist names to Entries +type EntryMap = M.Map Text Entry + +mkEntryMap :: [Entry] -> EntryMap -> EntryMap +mkEntryMap es theMap = foldl (\theMap e -> M.insert (entryName e) e theMap) theMap es + + +entryGraph :: [Entry] -> Gr Entry () +entryGraph es = entryEdges es (entryNodes es) + + +entryNodes :: [Entry] -> Gr Entry () +entryNodes = foldr (\e g -> insNode (head (newNodes 1 g),e) g) (empty :: Gr Entry ()) + + +entryEdges :: [Entry] -> Gr Entry () -> Gr Entry () +entryEdges entries graph = + let nodeMap :: M.Map Entry Int + nodeMap = M.fromList $ map (\(a,b) -> (b,a)) $ labNodes graph + theMap = mkEntryMap entries M.empty + in foldr (\e g -> + insEdges [(M.findWithDefault (error "Error - This should never happen.") e nodeMap + ,M.findWithDefault undefined (M.findWithDefault + (error ("Error - This should never happen. Failed while looking up " + ++show adv ++ show theMap ++ show nodeMap)) adv theMap) nodeMap,()) + | adv <- map fst $ entryAdvisors e + ] g) graph entries + diff --git a/LICENSE b/LICENSE new file mode 100644 --- /dev/null +++ b/LICENSE @@ -0,0 +1,339 @@ + GNU GENERAL PUBLIC LICENSE + Version 2, June 1991 + + Copyright (C) 1989, 1991 Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The licenses for most software are designed to take away your +freedom to share and change it. By contrast, the GNU General Public +License is intended to guarantee your freedom to share and change free +software--to make sure the software is free for all its users. This +General Public License applies to most of the Free Software +Foundation's software and to any other program whose authors commit to +using it. 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If this is what you want to do, use the GNU Lesser General +Public License instead of this License. diff --git a/Main.hs b/Main.hs new file mode 100644 --- /dev/null +++ b/Main.hs @@ -0,0 +1,128 @@ +----------------------------------------------------------------------------- +-- | +-- Module : Main +-- Copyright : (C) Peter Robinson 2010-2012 +-- License : GPL-2 +-- +-- Maintainer : Peter Robinson +-- Stability : experimental +-- Portability : portable +-- +----------------------------------------------------------------------------- +module Main +where +import Control.Monad +import Control.Applicative +import Control.Concurrent +import Control.Exception +import Data.GraphViz +import Data.GraphViz.Attributes.Complete +import qualified Data.ByteString.Lazy.Char8 as B +import qualified Data.List as L +import System +-- import System.IO.Error +import System.Directory +import Data.Maybe +import Data.Text.Lazy(Text) +import Data.Text.Lazy.Encoding +import qualified Data.Text.Lazy as T +import System.Console.CmdArgs +import Prelude hiding(catch) + +import Extract +import Entry +import Graph + + +-- command line arguments: +data MathGenealogy = MathGenealogy + { filePrefix :: String + , keepDotFile :: Bool + , graphvizArgs :: String + , noPDF :: Bool + , quiet :: Bool + , startURL :: String + } + deriving(Eq,Data,Typeable,Show) + +mathGenealogy = MathGenealogy + { startURL = def &= args &= typ "URL" + , filePrefix = "output" &= typ "PREFIX" + , keepDotFile = False + , graphvizArgs = " -Tpdf -Gcharset=utf8 " &= typ "" &= opt " -Tpdf -Gcharset=utf8 " + , noPDF = False + , quiet = False + } &= summary "Mathematics Genealogy Visualizer" + &= details[ "Run the program with a start-URL, for example:", + "# mathgenealogy http://genealogy.math.ndsu.nodak.edu/id.php?id=18231"] + +-- | GraphViz style attributes for edges and nodes. +-- See: http://hackage.haskell.org/packages/archive/graphviz/2999.12.0.4/doc/html/Data-GraphViz-Attributes.html +-- TODO: figure out if GraphViz supports CSS files or similar. +edgeAtt = const [ Dir Forward + , color LightBlue2 + ] + +nodeAtt (num,e) = + [ textLabel (T.pack (show e)) + , Shape BoxShape + , if num == 1 then FontSize 18 else FontSize 14 + , styles [rounded,filled,bold] + , color LightYellow1 + , FontName (T.pack "ZapfChancery-MediumItalic") -- "Helvetica") + ] + + +main = do + MathGenealogy filePrefix keepDotFile graphvizArgs noPdf quiet startURL + <- cmdArgs mathGenealogy + when (null startURL) $ + throw (userError "Missing start-URL. Run 'mathgenealogy --help' for help.") + + gvExecutable <- (do m <- findExecutable "dot" + if m == Nothing + then throw (userError "Error - Couldn't find 'dot' program") + else return (fromJust m)) + putStrLn "Downloading data..." + theGraph <- entryGraph <$> traverseEntries quiet [T.pack startURL] + putStrLn "done. :)" + let dotFileName = filePrefix ++ ".dot" + putStr $ "Writing DOT-file " ++ dotFileName ++ "..." + let output = printDotGraph $ + graphToDot nonClusteredParams{ fmtNode = nodeAtt + , fmtEdge = edgeAtt + } theGraph + B.writeFile dotFileName (encodeUtf8 output) + `catch` (\(e::IOException) -> do { print e ; throw e }) + putStrLn "done. :)" + + unless noPdf $ do + putStr "Generating graphics file..." + let command = gvExecutable ++ " " ++ graphvizArgs ++ " " ++ dotFileName ++ " > " + ++ filePrefix ++ ".pdf" + print command + result <- system command + when (isExitFailure result) $ do + print $ "Error running the graphviz (dot) program. I tried: " ++ command + throw $ userError "Existing." + putStrLn "done. :)" + unless keepDotFile $ removeFile dotFileName + where + isExitFailure (ExitFailure _) = True + isExitFailure _ = False + + -- TODO: Build the graph here? + traverseEntries :: Bool -> [Text] -> IO [Entry] + traverseEntries quiet = traverseEntries' [] [] + where + traverseEntries' acc _ [] = return $ L.nub acc + traverseEntries' acc prevUrls (url:urls) = do + e <- downloadEntry url + threadDelay 1000000 + unless quiet $ print e + let newUrls = urlAdvisors e + traverseEntries' (e:acc) (url:prevUrls) ((newUrls L.\\ prevUrls) ++ urls) + +downloadEntry :: Text -> IO Entry +downloadEntry = liftM parseEntry . getTags + diff --git a/Setup.hs b/Setup.hs new file mode 100644 --- /dev/null +++ b/Setup.hs @@ -0,0 +1,2 @@ +import Distribution.Simple +main = defaultMain diff --git a/mathgenealogy.cabal b/mathgenealogy.cabal new file mode 100644 --- /dev/null +++ b/mathgenealogy.cabal @@ -0,0 +1,72 @@ +-- mathgenealogy.cabal auto-generated by cabal init. For additional +-- options, see +-- http://www.haskell.org/cabal/release/cabal-latest/doc/users-guide/authors.html#pkg-descr. +-- The name of the package. +Name: mathgenealogy + +-- The package version. See the Haskell package versioning policy +-- (http://www.haskell.org/haskellwiki/Package_versioning_policy) for +-- standards guiding when and how versions should be incremented. +Version: 0.0.1 + +Synopsis: Discover your (academic) ancestors! + +-- A longer description of the package. +Description: A command line program for extracting data from the + Mathematics Genealogy Project (). + . + For example, if Carl Gauss wanted to explore his academic ancestors, he + would type + . + > mathgenealogy http://genealogy.math.ndsu.nodak.edu/id.php?id=18231 + . + which will produce a directed acyclic graph in output.pdf. See + . + > mathgenealogy --help + . + for details. Requires GraphViz to run. + +-- Homepage: http://darcs.monoid.at/mathgenealogy + +License: GPL-2 + +License-file: LICENSE + +Stability: experimental + +Author: Peter Robinson + +Maintainer: Peter Robinson + +Copyright: (C) 2010-2012 Peter Robinson + +Category: Web + +Build-type: Simple + +-- Extra files to be distributed with the package, such as examples or +-- a README. +-- Extra-source-files: + +Cabal-version: >=1.4 + + +Executable mathgenealogy + build-depends: base >= 4 && < 5 + , text >= 0.11 && <0.12 + , directory >= 1.1 && <1.2 + , haskell98 >= 1.1 && <1.2 + , bytestring >= 0.9 && <1.0 + , graphviz >= 2999.12 && <3000.0 + , cmdargs >= 0.9.5 && <1.0.0 + , fgl >= 5.4 && <5.5 + , containers >= 0.4 && <0.5 + , tagsoup >= 0.12.6 && <0.13 + , HTTP >= 4000.1.2 && <5000 + Main-Is: Main.hs + Other-modules: Graph + , Extract + , Entry + extensions: ScopedTypeVariables + , DeriveDataTypeable +-- ghc-options: -O2