From 0e7e43f7f778a206b0b30c6997c7c36494e6c142 Mon Sep 17 00:00:00 2001
From: Allan Wang <me@allanwang.ca>
Date: Sun, 23 Feb 2020 13:40:29 -0800
Subject: Add delete keys function

---
 core/src/main/kotlin/ca/allanwang/kau/kpref/KPref.kt        | 10 +++++++++-
 core/src/main/kotlin/ca/allanwang/kau/kpref/KPrefBuilder.kt |  6 +++---
 2 files changed, 12 insertions(+), 4 deletions(-)

diff --git a/core/src/main/kotlin/ca/allanwang/kau/kpref/KPref.kt b/core/src/main/kotlin/ca/allanwang/kau/kpref/KPref.kt
index a45d66d..7f75370 100644
--- a/core/src/main/kotlin/ca/allanwang/kau/kpref/KPref.kt
+++ b/core/src/main/kotlin/ca/allanwang/kau/kpref/KPref.kt
@@ -42,7 +42,7 @@ open class KPref private constructor(
 
     internal val prefMap: MutableMap<String, ILazyResettable<*>> = mutableMapOf()
 
-     fun add(entry : KPrefDelegate<*>) {
+    fun add(entry: KPrefDelegate<*>) {
         if (prefMap.containsKey(entry.key))
             throw KPrefException("${entry.key} is already used elsewhere in preference $preferenceName")
         prefMap[entry.key] = entry
@@ -53,4 +53,12 @@ open class KPref private constructor(
     }
 
     operator fun get(key: String): ILazyResettable<*>? = prefMap[key]
+
+    /**
+     * Exposed key deletion function from builder.
+     * To avoid recursion, this type uses vararg
+     */
+    fun deleteKeys(vararg keys: String) {
+        deleteKeys(keys)
+    }
 }
diff --git a/core/src/main/kotlin/ca/allanwang/kau/kpref/KPrefBuilder.kt b/core/src/main/kotlin/ca/allanwang/kau/kpref/KPrefBuilder.kt
index b8fb8ea..7a35ac2 100644
--- a/core/src/main/kotlin/ca/allanwang/kau/kpref/KPrefBuilder.kt
+++ b/core/src/main/kotlin/ca/allanwang/kau/kpref/KPrefBuilder.kt
@@ -71,7 +71,7 @@ interface KPrefBuilder {
     /**
      * Remove keys from pref so they revert to the default
      */
-    fun KPref.deleteKeys(keys: Array<String>)
+    fun KPref.deleteKeys(keys: Array<out String>)
 }
 
 class KPrefBuilderAndroid(val sp: SharedPreferences) : KPrefBuilder {
@@ -143,7 +143,7 @@ class KPrefBuilderAndroid(val sp: SharedPreferences) : KPrefBuilder {
     override fun KPref.kprefSingle(key: String) =
         KPrefSingleDelegateAndroid(key, this, this@KPrefBuilderAndroid)
 
-    override fun KPref.deleteKeys(keys: Array<String>) {
+    override fun KPref.deleteKeys(keys: Array<out String>) {
         // Remove pref listing
         sp.edit().apply {
             keys.forEach { remove(it) }
@@ -179,7 +179,7 @@ object KPrefBuilderInMemory : KPrefBuilder {
 
     override fun KPref.kprefSingle(key: String) = KPrefSingleDelegateInMemory(key, this)
 
-    override fun KPref.deleteKeys(keys: Array<String>) {
+    override fun KPref.deleteKeys(keys: Array<out String>) {
         // Clear cached values
         keys.forEach { prefMap[it]?.invalidate() }
     }
-- 
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