From 258edb87c985e5d0013abec173da9ea7938fae53 Mon Sep 17 00:00:00 2001
From: johan12345 <johan.forstner@gmail.com>
Date: Sun, 18 Apr 2021 13:51:23 +0200
Subject: [PATCH] add ability to pass Chargeprice API key in encrypted form to
 Gradle build

(needed for F-Droid)
---
 app/build.gradle  | 15 +++++++++++++++
 gradle.properties |  2 +-
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/app/build.gradle b/app/build.gradle
index 59dc70b6..fe1dab94 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -86,6 +86,9 @@ android {
             variant.resValue "string", "mapbox_key", mapboxKey
         }
         def chargepriceKey = env.CHARGEPRICE_API_KEY ?: project.findProperty("CHARGEPRICE_API_KEY")
+        if (chargepriceKey == null && project.hasProperty("CHARGEPRICE_API_KEY_ENCRYPTED")) {
+            chargepriceKey = decode(project.findProperty("CHARGEPRICE_API_KEY_ENCRYPTED"), "FmK.d,-f*p+rD+WK!eds")
+        }
         if (chargepriceKey != null) {
             variant.resValue "string", "chargeprice_key", chargepriceKey
         }
@@ -188,3 +191,15 @@ dependencies {
 
     coreLibraryDesugaring 'com.android.tools:desugar_jdk_libs:1.1.1'
 }
+
+private static String decode(String s, String key) {
+    return new String(xorWithKey(s.decodeBase64(), key.getBytes()), "UTF-8");
+}
+
+private static byte[] xorWithKey(byte[] a, byte[] key) {
+    byte[] out = new byte[a.length];
+    for (int i = 0; i < a.length; i++) {
+        out[i] = (byte) (a[i] ^ key[i%key.length]);
+    }
+    return out;
+}
\ No newline at end of file
diff --git a/gradle.properties b/gradle.properties
index 23339e0d..376270d7 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -18,4 +18,4 @@ android.useAndroidX=true
 # Automatically convert third-party libraries to use AndroidX
 android.enableJetifier=true
 # Kotlin code style for this project: "official" or "obsolete":
-kotlin.code.style=official
+kotlin.code.style=official
\ No newline at end of file