[FEAT] Functionality to take a blockchainJSON and display the logs + votes details

Author: JanF01

app/build.gradle.kts

@@ -50,6 +50,8 @@ dependencies {
     implementation("io.ktor:ktor-serialization-kotlinx-json:3.2.3")
     implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:1.10.2")
     implementation("org.jetbrains.kotlinx:kotlinx-serialization-json:1.9.0")
+    implementation("com.google.code.gson:gson:2.13.1")
+    implementation("androidx.navigation:navigation-compose:2.9.3")
     implementation(libs.androidx.core.ktx)
     implementation(libs.androidx.lifecycle.runtime.ktx)
     implementation(libs.androidx.activity.compose)

app/src/main/AndroidManifest.xml

@@ -30,6 +30,9 @@
         <activity
             android:name=".WhitelistActivity"
             android:label="Authority Whitelist" />
+        <activity
+            android:name=".LogsActivity"
+            android:label="Logs" />
         <service
             android:name=".MyHostApduService"
             android:exported="true"

app/src/main/java/com/example/blockchainaccess/BlockchainEvent.kt

@@ -0,0 +1,89 @@
+package com.example.blockchainaccess
+
+import com.google.gson.annotations.SerializedName
+import com.google.gson.*
+import java.lang.reflect.Type
+
+sealed class BlockchainEvent {
+    abstract val type: String
+    abstract val blockHeight: Int
+    abstract val timestamp: String
+    abstract val previousBlockHash: String
+
+    abstract val aggregatorSignature: String
+    abstract val blockHash: String
+}
+
+data class AddUserEvent(
+    @SerializedName("type") override val type: String,
+    @SerializedName("block_height") override val blockHeight: Int,
+    @SerializedName("room") val room: String,
+    @SerializedName("timestamp") override val timestamp: String,
+    @SerializedName("previous_block_hash") override val previousBlockHash: String,
+    @SerializedName("votes") val votes: List<Vote>,
+    @SerializedName("new_user_id") val newUserId: String,
+    @SerializedName("voting_summary") val votingSummary: VotingSummary,
+    @SerializedName("added_to_chain") val addedToChain: Boolean,
+    @SerializedName("aggregator_signature") override val aggregatorSignature: String,
+    @SerializedName("block_hash") override val blockHash: String
+) : BlockchainEvent()
+
+data class AccessEvent(
+    @SerializedName("type") override val type: String,
+    @SerializedName("block_height") override val blockHeight: Int,
+    @SerializedName("room") val room: String,
+    @SerializedName("timestamp") override val timestamp: String,
+    @SerializedName("previous_block_hash") override val previousBlockHash: String,
+    @SerializedName("votes") val votes: List<Vote>,
+    @SerializedName("user_id") val userId: String,
+    @SerializedName("voting_summary") val votingSummary: VotingSummary,
+    @SerializedName("added_to_chain") val addedToChain: Boolean,
+    @SerializedName("aggregator_signature") override val aggregatorSignature: String,
+    @SerializedName("block_hash") override val blockHash: String
+) : BlockchainEvent()
+
+data class AddPubkeyEvent(
+    @SerializedName("type") override val type: String,
+    @SerializedName("block_height") override val blockHeight: Int,
+    @SerializedName("user_id") val userId: String,
+    @SerializedName("public_key") val publicKey: String,
+    @SerializedName("timestamp") override val timestamp: String,
+    @SerializedName("previous_block_hash") override val previousBlockHash: String,
+    @SerializedName("aggregator_signature") override val aggregatorSignature: String,
+    @SerializedName("block_hash") override val blockHash: String
+) : BlockchainEvent()
+
+data class Vote(
+    @SerializedName("node_id") val nodeId: String,
+    @SerializedName("vote") val vote: String,
+    @SerializedName("signature") val signature: String
+)
+
+data class VotingSummary(
+    @SerializedName("total_nodes") val totalNodes: Int,
+    @SerializedName("yes_votes") val yesVotes: Int,
+    @SerializedName("no_votes") val noVotes: Int
+)
+
+/**
+ * A custom TypeAdapter for deserializing BlockchainEvent objects.
+ * This adapter inspects the "type" field to determine the correct subclass
+ * to instantiate.
+ */
+class BlockchainEventTypeAdapter : JsonDeserializer<BlockchainEvent> {
+    override fun deserialize(
+        json: JsonElement,
+        typeOfT: Type?,
+        context: JsonDeserializationContext
+    ): BlockchainEvent {
+        val jsonObject = json.asJsonObject
+        val eventType = jsonObject.get("type").asString
+
+        return when (eventType) {
+            "add_user_event" -> context.deserialize(jsonObject, AddUserEvent::class.java)
+            "access_event" -> context.deserialize(jsonObject, AccessEvent::class.java)
+            "add_pubkey_event" -> context.deserialize(jsonObject, AddPubkeyEvent::class.java)
+            else -> throw IllegalArgumentException("Unknown event type: $eventType")
+        }
+    }
+}