[FIX] cluster on connected components only and leaves others nodes alone...

[FIX] cluster on connected components only and leaves others nodes alone (todo). Use Order1 by default

src/Gargantext/Core/Viz/Graph/API.hs

@@ -125,7 +125,7 @@ recomputeGraph _uId nId maybeDistance = do
                   identity
                   $ nodeGraph ^. node_parent_id
     similarity = case graphMetric of
-                   Nothing -> withMetric Order2
+                   Nothing -> withMetric Order1
                    Just m  -> withMetric m
 
   case graph of
@@ -159,7 +159,7 @@ computeGraph cId d nt repo = do
   let ngs = filterListWithRoot MapTerm
           $ mapTermListRoot [lId] nt repo
 
-  myCooc <- HashMap.filter (>1) -- Removing the hapax (ngrams with 1 cooc)
+  myCooc <- HashMap.filter (>2) -- Removing the hapax (ngrams with 1 cooc)
          <$> getCoocByNgrams (Diagonal True)
          <$> groupNodesByNgrams ngs
          <$> getNodesByNgramsOnlyUser cId (lIds <> [lId]) nt (HashMap.keys ngs)

src/Gargantext/Core/Viz/Graph/Tools/IGraph.hs

@@ -68,7 +68,9 @@ spinglass s g = toClusterNode
     g''  = mkGraphUfromEdges (Map.keys g')
     g''' = case IG.isConnected g'' of
       True -> g''
-      False -> panic "[G.C.V.G.T.Igraph: not connected graph]"
+      False -> case head (IG.decompose g'') of
+        Nothing    -> panic "[G.C.V.G.T.Igraph: not connected graph]"
+        Just g'''' -> g''''
 
     (toI, fromI) = createIndices g