SetName + replaceDataFromFile

flutter/lib/src/graph.dart

@@ -174,6 +174,8 @@ class Graphs {
     _fixAfterDel(inn);
     return null;
   }
+
+  void flushData() => _dots = <Dot>[];
   //*********Delete*********
 
   //******Helper*******
@@ -242,6 +244,49 @@ class Graphs {
   }
   //******Helper*******
 
+  //*****Setters*******
+  void setName(String name) => _name = name;
+  String? replaceDataFromFile(String path) {
+    Separators sep = Separators();
+    File file = File(path);
+    List<String> lines = file.readAsLinesSync();
+    _name = lines.removeAt(0);
+    _oriented = lines.removeAt(0) == sep.isOriented.trim();
+    _useLength = lines.removeAt(0) == sep.hasLength.trim();
+    _dots = <Dot>[];
+    for (var l in lines) {
+      l = l.trimRight();
+      if (l != sep.end) {
+        var spl = l.split(sep.space);
+        List<int> dot = <int>[];
+        List<int> len = <int>[];
+        String name = spl.removeAt(0);
+        name = name.substring(0, name.length - 1);
+        for (var splitted in spl) {
+          if (splitted != "") {
+            var dt = splitted.split(sep.dotToLength);
+            if (dt.length == 2) {
+              dot.add(int.parse(dt[0]));
+              if (_useLength) {
+                len.add(int.parse(dt[1]));
+              } else {
+                len.add(0);
+              }
+            } else if (dt.length == 1) {
+              dot.add(int.parse(splitted));
+              len.add(0);
+            }
+          }
+        }
+        _dots.add(Dot.fromTwoLists(name, dot, len));
+      }
+    }
+    _syncNum();
+    _syncNameTable();
+    if (!_oriented) _fullFix();
+  }
+  //*****Setters*******
+
   //*****Getters*******
   bool getDoubleSided() => _oriented;
   bool getUseLength() => _useLength;
@@ -401,12 +446,6 @@ class Graphs {
     _syncNameTable();
   }
 
-  //***********Cleaning***********
-  void flushData() {
-    _dots = <Dot>[];
-  }
-  //***********Cleaning***********
-
   //************Алгоритмы************
   bool bfsHasPath(int startDot, int goalDot) {
     // обход в ширину