fix potential crashes

Signed-off-by: alperozturk <alper_ozturk@proton.me>

Author: alperozturk96

library/src/main/java/com/nextcloud/extensions/JsonObjectExtensions.kt

@@ -0,0 +1,22 @@
+/*
+ * Nextcloud - Android Client
+ *
+ * SPDX-FileCopyrightText: 2025 Alper Ozturk <alper.ozturk@nextcloud.com>
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+package com.nextcloud.extensions
+
+import com.google.gson.JsonObject
+
+fun JsonObject?.getBoolean(key: String): Boolean? {
+    if (this == null) {
+        return null
+    }
+
+    if (has(key) && get(key).isJsonPrimitive) {
+        return get(key).asBoolean
+    }
+
+    return null
+}

library/src/main/java/com/owncloud/android/lib/resources/shares/attributes/ShareAttributes.kt

@@ -10,7 +10,16 @@ package com.owncloud.android.lib.resources.shares.attributes
 data class ShareAttributes(
     val scope: String,
     val key: String,
-    var isEnabled: Boolean
-)
+    var value: Boolean
+) {
+    companion object {
+        const val DOWNLOAD_ATTRIBUTE_KEY = "download"
 
-fun List<ShareAttributes>?.getDownloadAttribute(): ShareAttributes? = this?.find { it.key == "download" }
+        fun createDownloadAttributes(value: Boolean): ShareAttributes {
+            return ShareAttributes(scope = "permissions", key = DOWNLOAD_ATTRIBUTE_KEY, value = value)
+        }
+    }
+}
+
+fun List<ShareAttributes>?.getDownloadAttribute(): ShareAttributes? =
+    this?.find { it.key == ShareAttributes.DOWNLOAD_ATTRIBUTE_KEY }

library/src/main/java/com/owncloud/android/lib/resources/shares/attributes/ShareAttributesSerializer.kt

@@ -10,6 +10,7 @@ package com.owncloud.android.lib.resources.shares.attributes
 import com.google.gson.JsonDeserializationContext
 import com.google.gson.JsonDeserializer
 import com.google.gson.JsonElement
+import com.nextcloud.extensions.getBoolean
 import java.lang.reflect.Type
 
 /**
@@ -28,13 +29,7 @@ class ShareAttributesDeserializer : JsonDeserializer<ShareAttributes> {
         val jsonObject = json?.asJsonObject
         val scope = jsonObject?.get("scope")?.asString ?: ""
         val key = jsonObject?.get("key")?.asString ?: ""
-
-        val status = when {
-            jsonObject?.has("enabled") == true -> jsonObject.get("enabled").asBoolean
-            jsonObject?.has("value") == true -> jsonObject.get("value").asBoolean
-            else -> false
-        }
-
-        return ShareAttributes(scope, key, status)
+        val value = (jsonObject.getBoolean("value") ?: jsonObject.getBoolean("enabled")) == true
+        return ShareAttributes(scope, key, value)
     }
 }