From 438bbd70a07835db41957eddf02581d932110163 Mon Sep 17 00:00:00 2001
From: EpicKnarvik97 <kristian.knarvik@knett.no>
Date: Sat, 22 Feb 2020 23:34:19 +0100
Subject: [PATCH] =?UTF-8?q?Legger=20til=20en=20utility=20klasse=20for=20?=
 =?UTF-8?q?=C3=A5=20laste=20inn=20et=20brett=20fra=20en=20tekstfil?=
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---
 .../roborally/utility/BoardLoaderUtil.java    | 94 +++++++++++++++++++
 .../utility/BoardLoaderUtilTest.java          | 15 +++
 2 files changed, 109 insertions(+)
 create mode 100644 src/main/java/inf112/fiasko/roborally/utility/BoardLoaderUtil.java
 create mode 100644 src/test/java/inf112/fiasko/roborally/utility/BoardLoaderUtilTest.java

diff --git a/src/main/java/inf112/fiasko/roborally/utility/BoardLoaderUtil.java b/src/main/java/inf112/fiasko/roborally/utility/BoardLoaderUtil.java
new file mode 100644
index 0000000..4dbe1cb
--- /dev/null
+++ b/src/main/java/inf112/fiasko/roborally/utility/BoardLoaderUtil.java
@@ -0,0 +1,94 @@
+package inf112.fiasko.roborally.utility;
+
+import inf112.fiasko.roborally.element_properties.*;
+import inf112.fiasko.roborally.objects.*;
+
+import java.io.*;
+import java.util.List;
+
+/**
+ * Loads a board
+ */
+public final class BoardLoaderUtil {
+    private BoardLoaderUtil() {}
+
+    /**
+     * Loads a board described in a file
+     * @param boardFile The file containing the board description
+     * @param robotList A list of robots on the board
+     * @return A board
+     * @throws IOException If the board file cannot be loaded
+     */
+    public static Board loadBoard(String boardFile, List<Robot> robotList) throws IOException {
+        ClassLoader classloader = Thread.currentThread().getContextClassLoader();
+        InputStream fileStream = classloader.getResourceAsStream(boardFile);
+        if (fileStream == null) {
+            throw new IllegalArgumentException("Board file could not be loaded.");
+        }
+
+        BufferedReader reader = new BufferedReader(new InputStreamReader(fileStream));
+        String infoLine = reader.readLine();
+        String[] infoData = infoLine.split(" ");
+        int gridWidth = Integer.parseInt(infoData[0]);
+        int gridHeight = Integer.parseInt(infoData[1]);
+
+        IGrid<Tile> tileGrid = loadTileGrid(reader, gridWidth, gridHeight);
+        IGrid<Wall> wallGrid = loadWallGrid(reader, gridWidth, gridHeight);
+        return new Board(tileGrid, wallGrid, robotList);
+    }
+
+    /**
+     * Loads information about a tile grid from a buffered reader
+     * @param reader A buffered reader ready to read information about the grid
+     * @param gridWidth The width of the grid to load
+     * @param gridHeight The height of the grid to load
+     * @return A grid containing the tiles described by the buffered reader
+     * @throws IOException If the reader reads invalid grid information
+     */
+    private static IGrid<Tile> loadTileGrid(BufferedReader reader, int gridWidth, int gridHeight) throws IOException {
+        IGrid<Tile> tileGrid = new Grid<>(gridWidth, gridHeight);
+        for (int i = 0; i < gridHeight; i++) {
+            String gridLine = reader.readLine();
+            String[] tilesOnLine = gridLine.split(" ");
+            for (int j = 0; j < gridWidth; j++) {
+                String[] tileData = tilesOnLine[j].split(";");
+                TileType tileType = TileType.getTileTypeFromID(Integer.parseInt(tileData[0]));
+                Direction direction = Direction.getDirectionFromID(Integer.parseInt(tileData[1]));
+                if (direction == null) {
+                    throw new IllegalArgumentException("Invalid direction for tile encountered when loading board file.");
+                }
+                tileGrid.setElement(i, j, new Tile(tileType, direction));
+            }
+        }
+        return tileGrid;
+    }
+
+    /**
+     * Loads information about a wall grid from a buffered reader
+     * @param reader A buffered reader ready to read information about the grid
+     * @param gridWidth The width of the grid to load
+     * @param gridHeight The height of the grid to load
+     * @return A grid containing the walls described by the buffered reader
+     * @throws IOException If the reader reads invalid grid information
+     */
+    private static IGrid<Wall> loadWallGrid(BufferedReader reader, int gridWidth, int gridHeight) throws IOException {
+        IGrid<Wall> wallGrid = new Grid<>(gridWidth, gridHeight);
+        for (int i = 0; i < gridHeight; i++) {
+            String gridLine = reader.readLine();
+            String[] wallsOnLine = gridLine.split(" ");
+            for (int j = 0; j < gridWidth; j++) {
+                if (wallsOnLine[j].equals("0")) {
+                    continue;
+                }
+                String[] wallData = wallsOnLine[j].split(";");
+                WallType wallType = WallType.getWallTypeFromID(Integer.parseInt(wallData[0]));
+                Direction direction = Direction.getDirectionFromID(Integer.parseInt(wallData[1]));
+                if (direction == null) {
+                    throw new IllegalArgumentException("Invalid direction for tile encountered when loading board file.");
+                }
+                wallGrid.setElement(i, j, new Wall(wallType, direction));
+            }
+        }
+        return wallGrid;
+    }
+}
diff --git a/src/test/java/inf112/fiasko/roborally/utility/BoardLoaderUtilTest.java b/src/test/java/inf112/fiasko/roborally/utility/BoardLoaderUtilTest.java
new file mode 100644
index 0000000..885948b
--- /dev/null
+++ b/src/test/java/inf112/fiasko/roborally/utility/BoardLoaderUtilTest.java
@@ -0,0 +1,15 @@
+package inf112.fiasko.roborally.utility;
+
+import inf112.fiasko.roborally.objects.Robot;
+import org.junit.Test;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+public class BoardLoaderUtilTest {
+    @Test
+    public void loadTestBoard() throws IOException {
+        List<Robot> robotList = new ArrayList<>();
+        BoardLoaderUtil.loadBoard("boards/test_board.txt", robotList);
+    }
+}