Improve JsonKeyReader

This commit makes the following changes:

- Uses XteaKeyDeserializer instead of reading the key array manually.
- Adds support for an object of map squares to keys, which is the format
  used by the OpenOSRS XTEA endpoint.
- Throws exceptions if the input is malformed, rather than silently
  ignoring problems.

Signed-off-by: Graham <gpe@openrs2.org>

archive/src/main/kotlin/org/openrs2/archive/key/JsonKeyReader.kt

@@ -1,8 +1,10 @@
 package org.openrs2.archive.key
 
 import com.fasterxml.jackson.databind.ObjectMapper
+import com.fasterxml.jackson.module.kotlin.treeToValue
 import org.openrs2.crypto.XteaKey
 import org.openrs2.json.Json
+import java.io.IOException
 import java.io.InputStream
 import javax.inject.Inject
 import javax.inject.Singleton
@@ -12,21 +14,24 @@ public class JsonKeyReader @Inject constructor(
     @Json private val mapper: ObjectMapper
 ) : KeyReader {
     override fun read(input: InputStream): Sequence<XteaKey> {
-        return sequence {
-            for (mapSquare in mapper.readTree(input)) {
-                val key = mapSquare["key"] ?: mapSquare["keys"] ?: continue
+        val keys = mutableListOf<XteaKey>()
+        val root = mapper.readTree(input)
 
-                if (key.size() != 4) {
-                    continue
+        when {
+            root.isArray -> {
+                for (entry in root) {
+                    val key = entry["key"] ?: entry["keys"] ?: throw IOException("Missing 'key' or 'keys' field")
+                    keys += mapper.treeToValue<XteaKey>(key) ?: throw IOException("Key must be non-null")
                 }
-
-                val k0 = key[0].asText().toIntOrNull() ?: continue
-                val k1 = key[1].asText().toIntOrNull() ?: continue
-                val k2 = key[2].asText().toIntOrNull() ?: continue
-                val k3 = key[3].asText().toIntOrNull() ?: continue
-
-                yield(XteaKey(k0, k1, k2, k3))
             }
+            root.isObject -> {
+                for (entry in root.fields()) {
+                    keys += mapper.treeToValue<XteaKey>(entry.value) ?: throw IOException("Key must be non-null")
+                }
+            }
+            else -> throw IOException("Root element must be an array or object")
         }
+
+        return keys.asSequence()
     }
 }