Create common interface named Source for Feed and FeedGroup

core/model/src/commonMain/kotlin/dev/sasikanth/rss/reader/core/model/local/Feed.kt

@@ -20,7 +20,7 @@ import kotlinx.datetime.Instant
 
 @Immutable
 data class Feed(
-  val id: String,
+  override val id: String,
   val name: String,
   val icon: String,
   val description: String,
@@ -31,4 +31,5 @@ data class Feed(
   val lastCleanUpAt: Instant? = null,
   val numberOfUnreadPosts: Long = 0L,
   val alwaysFetchSourceArticle: Boolean = false,
-)
+  override val sourceType: SourceType = SourceType.Feed
+) : Source

core/model/src/commonMain/kotlin/dev/sasikanth/rss/reader/core/model/local/FeedGroup.kt

@@ -19,10 +19,11 @@ package dev.sasikanth.rss.reader.core.model.local
 import kotlinx.datetime.Instant
 
 data class FeedGroup(
-  val id: String,
+  override val id: String,
   val name: String,
   val feedIds: Set<String>,
   val feedIcons: Set<String>,
   val createdAt: Instant,
   val updatedAt: Instant,
-)
+  override val sourceType: SourceType = SourceType.FeedGroup
+) : Source

core/model/src/commonMain/kotlin/dev/sasikanth/rss/reader/core/model/local/Source.kt

@@ -0,0 +1,27 @@
+/*
+ * Copyright 2024 Sasikanth Miriyampalli
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package dev.sasikanth.rss.reader.core.model.local
+
+interface Source {
+  val id: String
+  val sourceType: SourceType
+}
+
+enum class SourceType {
+  Feed,
+  FeedGroup
+}