From d8ac53753531c2f95accfb838ad69b9be33f2384 Mon Sep 17 00:00:00 2001
From: Yair Morgenstern <yairm210@hotmail.com>
Date: Wed, 18 Jul 2018 23:13:58 +0300
Subject: [PATCH] Cut down saved game size when copying text to the clipboard
 by 85% using gzip

---
 core/src/com/unciv/ui/LoadScreen.kt |  3 +-
 core/src/com/unciv/ui/SaveScreen.kt | 68 +++++++++++++++++++++++++++--
 2 files changed, 67 insertions(+), 4 deletions(-)

diff --git a/core/src/com/unciv/ui/LoadScreen.kt b/core/src/com/unciv/ui/LoadScreen.kt
index 68c16d4670..a019304353 100644
--- a/core/src/com/unciv/ui/LoadScreen.kt
+++ b/core/src/com/unciv/ui/LoadScreen.kt
@@ -61,7 +61,8 @@ class LoadScreen : PickerScreen() {
         loadFromClipboardButton.addClickListener {
             try{
                 val clipboardContentsString = Gdx.app.clipboard.contents
-                val loadedGame = Json().fromJson(GameInfo::class.java, clipboardContentsString)
+                val decoded = Gzip.decompress(Gzip.decoder(clipboardContentsString))
+                val loadedGame = Json().fromJson(GameInfo::class.java, decoded)
                 loadedGame.setTransients()
                 UnCivGame.Current.loadGame(loadedGame)
             }catch (ex:Exception){
diff --git a/core/src/com/unciv/ui/SaveScreen.kt b/core/src/com/unciv/ui/SaveScreen.kt
index 44d63188a6..c30b730d33 100644
--- a/core/src/com/unciv/ui/SaveScreen.kt
+++ b/core/src/com/unciv/ui/SaveScreen.kt
@@ -5,6 +5,7 @@ import com.badlogic.gdx.scenes.scene2d.ui.Label
 import com.badlogic.gdx.scenes.scene2d.ui.Table
 import com.badlogic.gdx.scenes.scene2d.ui.TextButton
 import com.badlogic.gdx.scenes.scene2d.ui.TextField
+import com.badlogic.gdx.utils.Base64Coder
 import com.badlogic.gdx.utils.Json
 import com.unciv.UnCivGame
 import com.unciv.logic.GameSaver
@@ -13,6 +14,14 @@ import com.unciv.ui.utils.addClickListener
 import com.unciv.ui.utils.enable
 import com.unciv.ui.utils.getRandom
 import com.unciv.ui.utils.tr
+import java.io.BufferedReader
+import java.io.ByteArrayInputStream
+import java.io.ByteArrayOutputStream
+import java.io.InputStreamReader
+import java.util.zip.GZIPInputStream
+import java.util.zip.GZIPOutputStream
+import kotlin.text.Charsets.UTF_8
+
 
 class SaveScreen : PickerScreen() {
     val textField = TextField("", skin)
@@ -35,8 +44,9 @@ class SaveScreen : PickerScreen() {
 
         val newSave = Table()
         val adjectives = listOf("Prancing","Obese","Junior","Senior","Abstract","Discombobulating","Simple","Awkward","Holy",
-                "Dangerous","Greasy","Stinky","Purple","Majestic","Incomprehensible","Cardboard","Chocolate","Robot","Ninja")
-        val nouns = listOf("Moose","Pigeon","Weasel","Ferret","Onion","Marshmallow","Crocodile","Inu Shiba",
+                "Dangerous","Greasy","Stinky","Purple","Majestic","Incomprehensible","Cardboard","Chocolate","Robot","Ninja",
+                "Fluffy","Magical","Invisible")
+        val nouns = listOf("Moose","Pigeon","Weasel","Ferret","Onion","Marshmallow","Crocodile","Unicorn",
                 "Sandwich","Elephant","Kangaroo","Marmot","Beagle","Dolphin","Fish","Tomato","Duck","Dinosaur")
         val defaultSaveName = adjectives.getRandom()+" "+nouns.getRandom()
         textField.text = defaultSaveName
@@ -45,7 +55,11 @@ class SaveScreen : PickerScreen() {
         newSave.add(textField).width(300f).pad(10f).row()
 
         val copyJsonButton = TextButton("Copy game info".tr(),skin)
-        copyJsonButton.addClickListener { Gdx.app.clipboard.contents =  Json().toJson(game.gameInfo)}
+        copyJsonButton.addClickListener {
+            val json = Json().toJson(game.gameInfo)
+            val base64Gzip = Gzip.encoder(Gzip.compress(json))
+            Gdx.app.clipboard.contents =  base64Gzip
+        }
         newSave.add(copyJsonButton)
 
         topTable.add(newSave)
@@ -59,4 +73,52 @@ class SaveScreen : PickerScreen() {
         rightSideButton.enable()
     }
 
+}
+
+
+object Gzip {
+
+    fun compress(data: String): ByteArray {
+        val bos = ByteArrayOutputStream(data.length)
+        val gzip = GZIPOutputStream(bos)
+        gzip.write(data.toByteArray())
+        gzip.close()
+        val compressed = bos.toByteArray()
+        bos.close()
+        return compressed
+    }
+
+    fun decompress(compressed: ByteArray): String {
+        val bis = ByteArrayInputStream(compressed)
+        val gis = GZIPInputStream(bis)
+        val br = BufferedReader(InputStreamReader(gis, "UTF-8"))
+        val sb = StringBuilder()
+        var line: String? = br.readLine()
+        while (line != null) {
+            sb.append(line)
+            line = br.readLine()
+        }
+        br.close()
+        gis.close()
+        bis.close()
+        return sb.toString()
+    }
+
+
+    fun gzip(content: String): ByteArray {
+        val bos = ByteArrayOutputStream()
+        GZIPOutputStream(bos).bufferedWriter(UTF_8).use { it.write(content) }
+        return bos.toByteArray()
+    }
+
+    fun ungzip(content: ByteArray): String =
+            GZIPInputStream(content.inputStream()).bufferedReader(UTF_8).use { it.readText() }
+
+    fun encoder(bytes:ByteArray): String{
+        return String(Base64Coder.encode(bytes))
+    }
+
+    fun decoder(base64Str: String): ByteArray{
+        return Base64Coder.decode(base64Str)
+    }
 }
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