refactored

include/field.h

@@ -19,8 +19,8 @@ private:
     size_t FieldSize = 4;
     std::vector<Line> field;
 
-    Line& getRow(size_t rowIndex) const;
-    Line& getColumn(size_t columnIndex) const;
+    Line getRow(size_t rowIndex) const;
+    Line getColumn(size_t columnIndex) const;
     void setRow(size_t rowIndex, const Line &line);
     void setColumn(size_t columnIndex, const Line &line);
 
@@ -31,10 +31,7 @@ public:
     Field(size_t fieldSize);
 
     bool canMove() const;
-    bool moveUp();
-    bool moveDown();
-    bool moveLeft();
-    bool moveRight();
+    bool move(Direction direction);
 
     std::vector<Position> getEmptyTiles() const;
     bool spawnTile(const std::vector<Position> &empty);

include/types.h

@@ -2,3 +2,10 @@
 
 using Tile = unsigned long long int;
 using Score = unsigned long long int;
+
+enum class Direction {
+    up,
+    down,
+    left,
+    right
+};

main.cpp

@@ -3,6 +3,7 @@
 #include <algorithm>
 #include "field.h"
 
+
 using Tile = unsigned long long int;
 
 int main() {
@@ -15,19 +16,19 @@ int main() {
         switch (action)
         {
         case 'w':
-            field.moveUp();
+            field.move(Direction::up);
             field.spawnTile(field.getEmptyTiles());
             break;
         case 's':
-            field.moveDown();
+            field.move(Direction::down);
             field.spawnTile(field.getEmptyTiles());
             break;
         case 'a':
-            field.moveLeft();
+            field.move(Direction::left);
             field.spawnTile(field.getEmptyTiles());
             break;
         case 'd':
-            field.moveRight();
+            field.move(Direction::right);
             field.spawnTile(field.getEmptyTiles());
             break;
         default:

source/field.cpp

@@ -20,11 +20,11 @@ Public methods:
 */
 
 // PRIVATE
-Line& Field::getRow(size_t rowIndex) const {
+Line Field::getRow(size_t rowIndex) const {
     return this->field[rowIndex];
 }
 
-Line& Field::getColumn(size_t columnIndex) const {
+Line Field::getColumn(size_t columnIndex) const {
     // from top to bottom
     Line column;
     for (size_t i = 0; i < this->FieldSize; ++i) {
@@ -63,44 +63,35 @@ void printVector(const Line &arr) {
     printf("\n");
 }
 
-bool Field::moveUp() {
+bool Field::move(Direction direction) {
     auto oldField = this->field;
-    for (size_t i = 0; i < this->FieldSize; ++i) {
     Line column;
-        column = getColumn(i);
-        column.process();
-        setColumn(i, column);
-    }
-    return this->field != oldField;
-}
-
-bool Field::moveDown() {
-    auto oldField = this->field;
-    for (size_t i = 0; i < this->FieldSize; ++i) {
-        Line column;
-        column = getColumn(i);
-        std::reverse(column.begin(), column.end());
-        column.process();
-        std::reverse(column.begin(), column.end());
-        setColumn(i, column);
-    }
-    return this->field != oldField; 
-}
-
-bool Field::moveLeft() {
-    auto oldField = this->field;
     Line row;
+
+    switch (direction) {
+    case Direction::up:
+        for (size_t i = 0; i < this->FieldSize; ++i) {
+            column = getColumn(i);
+            column.process();
+            setColumn(i, column);
+        }
+        break;
+    case Direction::down:
+        for (size_t i = 0; i < this->FieldSize; ++i) {
+            column = getColumn(i); 
+            std::reverse(column.begin(), column.end());
+            column.process();
+            std::reverse(column.begin(), column.end());
+            setColumn(i, column);
+        }
+        break;
+    case Direction::left:
         for (size_t i = 0; i < this->FieldSize; ++i) {
             row = getRow(i);
             row.process();
             setRow(i, row);
         }
-    return this->field != oldField;
-}
-
-bool Field::moveRight() {
-    auto oldField = this->field;
-    Line row;
+    case Direction::right:
         for (size_t i = 0; i < this->FieldSize; ++i) {
             row = getRow(i);
             std::reverse(row.begin(), row.end());
@@ -108,10 +99,12 @@ bool Field::moveRight() {
             std::reverse(row.begin(), row.end());
             setRow(i, row);
         }
+    default:
+        throw std::exception();
+    }
     return this->field != oldField; 
 }
 
-
 std::vector<Position> Field::getEmptyTiles() const {
     std::vector<Position> empty;
     for (size_t i = 0; i < this->FieldSize; ++i) {

source/line.cpp

@@ -8,12 +8,12 @@ Fields:
 
 Line::Line() {
     this->line.clear();
-    this->line.reserve(4);
+    this->line.resize(4);
 }
 
 Line::Line(size_t length) {
     this->line.clear();
-    this->line.reserve(length);
+    this->line.resize(length);
 }
 
 void Line::process() {