quickslot works, new event for actor "actorValueChanged"

- "unpacking" fresh new tool would un-register quickslot desig.
- priority issue on "equipped by quickslot change" and "equipped by inventory UI"

src/net/torvald/terrarum/serialise/WriteMeta.kt

@@ -0,0 +1,71 @@
+package net.torvald.terrarum.serialise
+
+import net.torvald.terrarum.worldgenerator.WorldGenerator
+import net.torvald.terrarum.worldgenerator.RoguelikeRandomiser
+import java.nio.charset.Charset
+
+/**
+ * Created by minjaesong on 16-03-15.
+ */
+// internal for everything: prevent malicious module from messing up the savedata
+internal object WriteMeta {
+
+    val META_FILENAME = "world"
+
+    val MAGIC = "TESV".toByteArray(charset = Charset.forName("US-ASCII"))
+
+
+    val BYTE_NULL: Byte = 0
+
+    val terraseed: Long = WorldGenerator.SEED
+    val rogueseed: Long = RoguelikeRandomiser.seed
+
+    /**
+     * Write save meta to specified directory. Returns false if something went wrong.
+     * @param saveDirectoryName
+     * @param savegameName -- Nullable. If the value is not specified, saveDirectoryName will be used instead.
+     */
+    internal fun write(saveDirectoryName: String, savegameName: String?): Boolean {
+        /*val hashArray: ArrayList<ByteArray> = ArrayList()
+        val savenameAsByteArray: ByteArray =
+                (savegameName ?: saveDirectoryName).toByteArray(Charsets.UTF_8)
+
+        // define Strings to be hashed
+        val props = arrayOf(
+                TilePropCSV()
+                //, (item, mat, ...)
+        )
+
+        // get and store hash from the list
+        props.map { hashArray.add(DigestUtils.sha256(it)) }
+
+        // open file and delete it
+        val metaPath = Paths.get("$Terrarum.defaultSaveDir" +
+                                       "/$saveDirectoryName/$META_FILENAME")
+        val metaTempPath = Files.createTempFile(metaPath.toString(), "_temp")
+
+        // TODO gzip
+
+        // write bytes in tempfile
+        Files.write(metaTempPath, MAGIC)
+        Files.write(metaTempPath, savenameAsByteArray)
+        Files.write(metaTempPath, byteArrayOf(BYTE_NULL))
+        Files.write(metaTempPath, toByteArray(terraseed))
+        Files.write(metaTempPath, toByteArray(rogueseed))
+        for (hash in hashArray)
+            Files.write(metaTempPath, hash)
+
+        // replace savemeta with tempfile
+        try {
+            Files.copy(metaTempPath, metaPath, StandardCopyOption.REPLACE_EXISTING)
+            Files.deleteIfExists(metaTempPath)
+            println("Saved metadata to $saveDirectoryName.")
+
+            return true
+        }
+        catch (e: IOException) {
+            e.printStackTrace()
+        }*/
+        return false
+    }
+}