restructure

android/src/main/java/com/rssuper/converters/DateConverter.kt

@@ -0,0 +1,16 @@
+package com.rssuper.converters
+
+import androidx.room.TypeConverter
+import java.util.Date
+
+class DateConverter {
+    @TypeConverter
+    fun fromTimestamp(value: Long?): Date? {
+        return value?.let { Date(it) }
+    }
+
+    @TypeConverter
+    fun dateToTimestamp(date: Date?): Long? {
+        return date?.time
+    }
+}

android/src/main/java/com/rssuper/converters/FeedItemListConverter.kt

@@ -0,0 +1,23 @@
+package com.rssuper.converters
+
+import androidx.room.TypeConverter
+import com.squareup.moshi.Moshi
+import com.squareup.moshi.kotlin.reflect.KotlinJsonAdapterFactory
+import com.rssuper.models.FeedItem
+
+class FeedItemListConverter {
+    private val moshi = Moshi.Builder()
+        .add(KotlinJsonAdapterFactory())
+        .build()
+    private val adapter = moshi.adapter(List::class.java)
+
+    @TypeConverter
+    fun fromFeedItemList(value: List<FeedItem>?): String? {
+        return value?.let { adapter.toJson(it) }
+    }
+
+    @TypeConverter
+    fun toFeedItemList(value: String?): List<FeedItem>? {
+        return value?.let { adapter.fromJson(it) as? List<FeedItem> }
+    }
+}

android/src/main/java/com/rssuper/converters/StringListConverter.kt

@@ -0,0 +1,15 @@
+package com.rssuper.converters
+
+import androidx.room.TypeConverter
+
+class StringListConverter {
+    @TypeConverter
+    fun fromStringList(value: List<String>?): String? {
+        return value?.joinToString(",")
+    }
+
+    @TypeConverter
+    fun toStringList(value: String?): List<String>? {
+        return value?.split(",")?.filter { it.isNotEmpty() }
+    }
+}