fixed graph printing

3 files changed, 17 insertions, 11 deletions

diff --git a/IO/FileWriter.cs b/IO/FileWriter.cs
index b3a574d..7e10f62 100644
--- a/IO/FileWriter.cs
+++ b/IO/FileWriter.cs
@@ -13,9 +13,9 @@ namespace Graph.IO
             FilePath = filePath;
         }
 
-        public void WriteAllText(string content)
+        public void WriteAllLines(string[] lines)
         {
-            File.WriteAllText(FilePath, content);
+            File.WriteAllLines(FilePath, lines);
         }
     }
 }
\ No newline at end of file
diff --git a/IO/GraphFile.cs b/IO/GraphFile.cs
index a532681..8562170 100644
--- a/IO/GraphFile.cs
+++ b/IO/GraphFile.cs
@@ -1,3 +1,4 @@
+using System.Collections.Generic;
 using System.Linq;
 using System.Text.RegularExpressions;
 using Graph.Interfaces;
@@ -43,21 +44,26 @@ namespace Graph.IO
 
         public static void Print(Graph<double> graph, IFileWriter writer)
         {
-            string outstring = "";
+            string[] lines = new string[graph.Vertices.Count];
             graph.Vertices.ForEach(vertex =>
             {
-                outstring += $"\n{vertex.Id}";
+                if (vertex.Parent == null)
+                    return;
 
-                vertex.Edges.ForEach(edge => {
-                    var vertex = graph.Vertices.Find(v => v.Id == edge.V);
-                    if (vertex != null && vertex.Parent == vertex.Id)
-                        outstring += $" {edge.V} {edge.Weight.ToString("F1")}";
-                });
+                int parent = vertex.Parent.GetValueOrDefault();
+                
+                lines[parent] ??= $"{parent}";
+                lines[vertex.Id] ??= $"{vertex.Id}";
+
+                lines[parent] += $" {vertex.Id} {vertex.Key.ToString("F1")}";
+                lines[vertex.Id] += $" {parent} {vertex.Key.ToString("F1")}";
             });
-            writer.WriteAllText(outstring.Trim());
+
+            writer.WriteAllLines(lines);
         }
     }
 }
+// vertex.Edges.ForEach(e => line += $" {e.V} {e.Weight.ToString("F1")}");
 
 // var neighbors = graph.Vertices
 //     .Where(u => u.Parent == vertex.Id && vertex.Edges.Exists(e => e.V == u.Id));
diff --git a/Interfaces/IFileWriter.cs b/Interfaces/IFileWriter.cs
index 92dd692..f264c2a 100644
--- a/Interfaces/IFileWriter.cs
+++ b/Interfaces/IFileWriter.cs
@@ -2,6 +2,6 @@ namespace Graph.Interfaces
 {
     public interface IFileWriter
     {
-        void  WriteAllText(string content);
+        void  WriteAllLines(string[] lines);
     }
 }
\ No newline at end of file