fixup! Switch from gson to kotlinx.serialization

Signed-off-by: Aayush Gupta <aayushgupta219@gmail.com>

app/src/main/java/com/aurora/store/data/serializers/LocaleSerializer.kt

@@ -0,0 +1,56 @@
+/*
+ * SPDX-FileCopyrightText: 2025 The Calyx Institute
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+package com.aurora.store.data.serializers
+
+import kotlinx.serialization.KSerializer
+import kotlinx.serialization.descriptors.SerialDescriptor
+import kotlinx.serialization.descriptors.buildClassSerialDescriptor
+import kotlinx.serialization.descriptors.element
+import kotlinx.serialization.encoding.CompositeDecoder
+import kotlinx.serialization.encoding.Decoder
+import kotlinx.serialization.encoding.Encoder
+import kotlinx.serialization.encoding.decodeStructure
+import kotlinx.serialization.encoding.encodeStructure
+import java.util.Locale
+
+/**
+ * Serializer for [Locale] for working with Kotlin's Serialization library
+ */
+object LocaleSerializer : KSerializer<Locale> {
+    override val descriptor: SerialDescriptor = buildClassSerialDescriptor("Locale") {
+        element<String>("language")
+        element<String>("region")
+    }
+
+    override fun serialize(encoder: Encoder, value: Locale) {
+        return encoder.encodeStructure(descriptor) {
+            encodeStringElement(descriptor, 0, value.language)
+            encodeStringElement(descriptor, 1, value.country)
+        }
+    }
+
+    override fun deserialize(decoder: Decoder): Locale {
+        return decoder.decodeStructure(descriptor) {
+            var language: String? = null
+            var region: String? = null
+
+            while (true) {
+                when (val index = decodeElementIndex(descriptor)) {
+                    0 -> language = decodeStringElement(descriptor, 0)
+                    1 -> region = decodeStringElement(descriptor, 1)
+                    CompositeDecoder.DECODE_DONE -> break
+                    else -> error("Unexpected index: $index")
+                }
+            }
+
+            require(!language.isNullOrBlank() && !region.isNullOrBlank())
+            Locale.Builder()
+                .setLanguage(language)
+                .setRegion(region)
+                .build()
+        }
+    }
+}

app/src/main/java/com/aurora/store/data/serializers/PropertiesSerializer.kt

@@ -0,0 +1,32 @@
+/*
+ * SPDX-FileCopyrightText: 2025 The Calyx Institute
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+package com.aurora.store.data.serializers
+
+import kotlinx.serialization.KSerializer
+import kotlinx.serialization.builtins.MapSerializer
+import kotlinx.serialization.builtins.serializer
+import kotlinx.serialization.descriptors.SerialDescriptor
+import kotlinx.serialization.encoding.Decoder
+import kotlinx.serialization.encoding.Encoder
+import java.util.Properties
+
+/**
+ * Serializer for [Properties] for working with Kotlin's Serialization library
+ */
+object PropertiesSerializer : KSerializer<Properties> {
+    override val descriptor: SerialDescriptor =
+        MapSerializer(String.serializer(), String.serializer()).descriptor
+
+    override fun serialize(encoder: Encoder, value: Properties) {
+        val map = value.stringPropertyNames().associateWith { value.getProperty(it) }
+        MapSerializer(String.serializer(), String.serializer()).serialize(encoder, map)
+    }
+
+    override fun deserialize(decoder: Decoder): Properties {
+        val map = MapSerializer(String.serializer(), String.serializer()).deserialize(decoder)
+        return Properties().apply { putAll(map) }
+    }
+}

app/src/main/java/com/aurora/store/module/CommonModule.kt

@@ -1,10 +1,14 @@
 package com.aurora.store.module
 
+import com.aurora.store.data.serializers.LocaleSerializer
+import com.aurora.store.data.serializers.PropertiesSerializer
 import dagger.Module
 import dagger.Provides
 import dagger.hilt.InstallIn
 import dagger.hilt.components.SingletonComponent
 import kotlinx.serialization.json.Json
+import kotlinx.serialization.modules.SerializersModule
+import kotlinx.serialization.modules.contextual
 import javax.inject.Singleton
 
 @Module
@@ -14,10 +18,16 @@ object CommonModule {
     @Singleton
     @Provides
     fun providesJsonInstance(): Json {
+        val module = SerializersModule {
+            contextual(LocaleSerializer)
+            contextual(PropertiesSerializer)
+        }
+
         return Json {
             prettyPrint = true
             ignoreUnknownKeys = true
             coerceInputValues = true
+            serializersModule = module
         }
     }
 }