Merge branch '4-add-check-solved-board-feature' into 'master'

Resolve "Add check solved board feature"

Closes #4

See merge request !4

android/gradle.properties

 org.gradle.jvmargs=-Xmx1536M
 android.useAndroidX=true
 android.enableJetifier=true
-app.versionName=0.0.4
-app.versionCode=4
+app.versionName=0.0.5
+app.versionCode=5

lib/screens/home.dart

@@ -179,7 +179,7 @@ class Home extends StatelessWidget {
     List cells = myProvider.cells;
     int size = myProvider.size;
 
-    Color borderColor = _checkBoardIsSolved(cells) ? Colors.green : Colors.orange;
+    Color borderColor = _checkBoardIsSolved(myProvider) ? Colors.green : Colors.orange;
 
     return Container(
       margin: EdgeInsets.all(2),
@@ -242,9 +242,74 @@ class Home extends StatelessWidget {
     );
   }
 
-  bool _checkBoardIsSolved(List cells) {
+  bool _checkBoardIsSolved(Data myProvider) {
+    List cells = myProvider.cells;
+    int size = myProvider.size;
+
+    // check grid is fully completed
+    for (var row = 0; row < pow(size, 2); row++) {
+      for (var col = 0; col < pow(size, 2); col++) {
+        if (cells[row][col].value == 0) {
+          print('grid not complete');
+          return false;
+        }
+      }
+    }
+    print('ok grid complete complete');
+
+    // check lines does not contains a value twice
+    for (var row = 0; row < pow(size, 2); row++) {
+      List values = [];
+      for (var col = 0; col < pow(size, 2); col++) {
+        values.add(cells[row][col].value);
+      }
+      List distinctValues = values.toSet().toList();
+      if (values.length != distinctValues.length) {
+        print('line ' + row.toString() + ' contains duplicates');
+        return false;
+      }
+    }
+    print('ok no line with duplicates');
+
+    // check columns does not contains a value twice
+    for (var col = 0; col < pow(size, 2); col++) {
+      List values = [];
+      for (var row = 0; row < pow(size, 2); row++) {
+        values.add(cells[row][col].value);
+      }
+      List distinctValues = values.toSet().toList();
+      if (values.length != distinctValues.length) {
+        print('column ' + col.toString() + ' contains duplicates');
+        return false;
+      }
+    }
+    print('ok no column with duplicates');
+
+    // check blocks does not contains a value twice
+    for (var blockRow = 0; blockRow < size; blockRow++) {
+      for (var blockCol = 0; blockCol < size; blockCol++) {
+        List values = [];
+
+        for (var rowInBlock = 0; rowInBlock < size; rowInBlock++) {
+          for (var colInBlock = 0; colInBlock < size; colInBlock++) {
+            int row = (blockRow * size) + rowInBlock;
+            int col = (blockCol * size) + colInBlock;
+            values.add(cells[row][col].value);
+          }
+        }
+
+        List distinctValues = values.toSet().toList();
+        if (values.length != distinctValues.length) {
+          print('block [' + blockCol.toString() + ',' + blockRow.toString() + '] contains duplicates');
           return false;
         }
+      }
+    }
+    print('ok no block with duplicates');
+
+    print('-> ok sudoku solved!');
+    return true;
+  }
 
   @override
   Widget build(BuildContext context) {