diceware: add WordListParser and tests

1 files changed, 21 insertions, 0 deletions

diff --git a/passgen/diceware/src/main/kotlin/dev/msfjarvis/aps/passgen/diceware/WordListParser.kt b/passgen/diceware/src/main/kotlin/dev/msfjarvis/aps/passgen/diceware/WordListParser.kt
new file mode 100644
index 00000000..5351aaa1
--- /dev/null
+++ b/passgen/diceware/src/main/kotlin/dev/msfjarvis/aps/passgen/diceware/WordListParser.kt
@@ -0,0 +1,21 @@
+/*
+ * Copyright © 2014-2021 The Android Password Store Authors. All Rights Reserved.
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+package dev.msfjarvis.aps.passgen.diceware
+
+import java.io.InputStream
+
+internal object WordListParser {
+  fun parse(wordlistStream: InputStream) =
+    wordlistStream
+      .bufferedReader()
+      .lineSequence()
+      .map { line -> line.split(DELIMITER) }
+      .filter { items -> items.size == 2 && items[0].toIntOrNull() != null }
+      .map { items -> items[0].toInt() to items[1] }
+      .toMap()
+
+  private const val DELIMITER = "\t"
+}