Can now look up nodes in a graph that have a specific name

1 files changed, 14 insertions, 1 deletions

diff --git a/src/Grasp/Types.hs b/src/Grasp/Types.hs
index 0211281..72f835a 100644
--- a/src/Grasp/Types.hs
+++ b/src/Grasp/Types.hs
@@ -11,6 +11,8 @@ import Data.Graph.Inductive.Graph( Node, LNode, LEdge, (&) )
 import qualified Data.Graph.Inductive.Graph as Graph
 import Data.Graph.Inductive.Tree
 import Data.List
+import Data.Maybe
+import qualified Data.Map as Map
 
 
 
@@ -27,10 +29,21 @@ instance (Ord a, Ord b) => Eq (Gr a b) where
 
 
 nodesWithName :: GraspProgram -> String -> [LNode String]
-nodesWithName g s = []
+nodesWithName g s =
+	let nodes = Graph.labNodes g
+	    edges = Graph.labEdges g
 
+	    nodeLabelMap = Map.fromList nodes
 
+	    nameEdges = filter (\(_,_,z) -> z == "name") edges
+	    specific = filter (\(_,y,_) -> fromJust (Map.lookup y nodeLabelMap) == s) nameEdges
+	    nameNodes = map (\(x,_,_) -> x) specific
 
+	in filter (\(x,_) -> x `elem` nameNodes) nodes
+
+
+
+-- to-do
 normalise :: GraspProgram -> GraspProgram
 normalise g = Graph.mkGraph [] []