Merge pull request #37 from teogor/feature/solver

Implement Sudoku puzzle parsing and decoding

.gitignore

@@ -44,3 +44,6 @@ sudokus.json
 local.properties
 
 /docs/dokka/
+demo/src/main/resources/raw/sudoku-solved.txt
+demo/src/main/resources/raw/sudoku-converted.txt
+demo/src/main/resources/raw/sudoku-puzzle.txt

demo/src/main/kotlin/dev/teogor/sudoklify/demo/gen/SudokuDecoder.kt

@@ -0,0 +1,48 @@
+/*
+ * Copyright 2023 Teogor (Teodor Grigor)
+ *
+ * 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
+ *
+ *     https://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 dev.teogor.sudoklify.demo.gen
+
+import dev.teogor.sudoklify.types.toToken
+import java.util.regex.Pattern
+
+class SudokuDecoder {
+  private val cellRegex: Pattern = Pattern.compile("<td class=\"[a-zA-Z]*\">(.*?)</td>")
+  private var matchCount = 0
+
+  fun parsePuzzle(fileContent: String): String {
+    val puzzleBuilder = StringBuilder()
+
+    val matchResults = cellRegex.matcher(fileContent)
+
+    while (matchResults.find()) {
+      matchCount++
+      val cellContent = matchResults.group(1)
+      val parsedNumber = if (cellContent == "&nbsp;") {
+        "-"
+      } else {
+        cellContent.toInt().toToken()
+      }
+      puzzleBuilder.append(parsedNumber)
+    }
+
+    return puzzleBuilder.toString()
+  }
+
+  fun getMatchCount(): Int {
+    return matchCount
+  }
+}