[LIB-9] Set of entities for PGN parsing and formatting

[chesshog.git] / chesshog-format / src / main / java / org / hedgecode / chess / pgn / format / wrap / AbstractWrapper.java

diff --git a/chesshog-format/src/main/java/org/hedgecode/chess/pgn/format/wrap/AbstractWrapper.java b/chesshog-format/src/main/java/org/hedgecode/chess/pgn/format/wrap/AbstractWrapper.java
new file mode 100644 (file)
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+++ b/chesshog-format/src/main/java/org/hedgecode/chess/pgn/format/wrap/AbstractWrapper.java
@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2018-2020. Developed by Hedgecode.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.hedgecode.chess.pgn.format.wrap;
+
+import static org.hedgecode.chess.pgn.PGNConstants.*;
+
+/**
+ * AbstractWrapper
+ *
+ * @author Dmitry Samoshin aka gotty
+ */
+public abstract class AbstractWrapper implements MovesWrapper {
+
+    protected abstract int length();
+
+    @Override
+    public String wrap(String moves) {
+        StringBuilder sb = new StringBuilder();
+        int startIndex = 0, endIndex = 0;
+        moves = moves.concat(PGN_SPACE);
+        int index = moves.indexOf(PGN_SPACE);
+        while (index >= 0) {
+            if (index - startIndex >= length()) {
+                sb.append(
+                        moves.substring(startIndex, endIndex)
+                ).append(PGN_CRLF);
+                startIndex = endIndex + 1;
+            }
+            endIndex = index;
+            index = moves.indexOf(PGN_SPACE, index + 1);
+        }
+        sb.append(
+                moves.substring(startIndex)
+        ).append(PGN_CRLF);
+        return sb.toString();
+    }
+
+}