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34
common/src/main/java/io/novafoundation/nova/common/utils/CollectionDiffer.kt
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| @@ -0,0 +1,34 @@ | ||
| package io.novafoundation.nova.common.utils | ||
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| interface Identifiable { | ||
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| val identifier: String | ||
| } | ||
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| object CollectionDiffer { | ||
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| class Diff<T>( | ||
| val newOrUpdated: List<T>, | ||
| val removed: List<T> | ||
| ) | ||
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| fun <T : Identifiable> findDiff(newItems: List<T>, oldItems: List<T>): Diff<T> { | ||
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| val newKeys: Set<String> = newItems.mapTo(mutableSetOf()) { it.identifier } | ||
| val oldMapping = oldItems.associateBy { it.identifier } | ||
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| val newOrUpdated = newItems.mapNotNull { new -> | ||
| val old = oldMapping[new.identifier] | ||
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| when { | ||
| old == null -> new // new | ||
| old != new -> new // updated | ||
| else -> null // same | ||
| } | ||
| } | ||
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| val removed = oldItems.filter { it.identifier !in newKeys } | ||
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| return Diff(newOrUpdated, removed) | ||
| } | ||
| } |
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17 changes: 17 additions & 0 deletions
17
core-db/src/main/java/io/novafoundation/nova/core_db/converters/NftTypeConverters.kt
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,17 @@ | ||
| package io.novafoundation.nova.core_db.converters | ||
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| import androidx.room.TypeConverter | ||
| import io.novafoundation.nova.core_db.model.NftLocal | ||
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| class NftTypeConverters { | ||
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| @TypeConverter | ||
| fun from(type: NftLocal.Type): String { | ||
| return type.name | ||
| } | ||
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| @TypeConverter | ||
| fun to(name: String): NftLocal.Type { | ||
| return enumValueOf(name) | ||
| } | ||
| } |
42 changes: 42 additions & 0 deletions
42
core-db/src/main/java/io/novafoundation/nova/core_db/dao/NftDao.kt
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,42 @@ | ||
| package io.novafoundation.nova.core_db.dao | ||
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| import androidx.room.Dao | ||
| import androidx.room.Delete | ||
| import androidx.room.Insert | ||
| import androidx.room.OnConflictStrategy | ||
| import androidx.room.Query | ||
| import androidx.room.Transaction | ||
| import androidx.room.Update | ||
| import io.novafoundation.nova.common.utils.CollectionDiffer | ||
| import io.novafoundation.nova.core_db.model.NftLocal | ||
| import kotlinx.coroutines.flow.Flow | ||
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| @Dao | ||
| interface NftDao { | ||
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| @Query("SELECT * FROM nfts WHERE metaId = :metaId") | ||
| fun nftsFlow(metaId: Long): Flow<List<NftLocal>> | ||
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| @Query("SELECT * FROM nfts WHERE metaId = :metaId AND type = :type") | ||
| suspend fun getNfts(metaId: Long, type: NftLocal.Type): List<NftLocal> | ||
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| @Delete | ||
| suspend fun deleteNfts(nfts: List<NftLocal>) | ||
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| @Insert(onConflict = OnConflictStrategy.REPLACE) | ||
| suspend fun insertNfts(nfts: List<NftLocal>) | ||
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| @Update | ||
| suspend fun updateNft(nft: NftLocal) | ||
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| @Transaction | ||
| suspend fun insertNftsDiff(nftType: NftLocal.Type, metaId: Long, newNfts: List<NftLocal>) { | ||
| val oldNfts = getNfts(metaId, nftType) | ||
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| val diff = CollectionDiffer.findDiff(newNfts, oldNfts) | ||
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| deleteNfts(diff.removed) | ||
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| insertNfts(diff.newOrUpdated) | ||
| } | ||
| } |
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27 changes: 27 additions & 0 deletions
27
core-db/src/main/java/io/novafoundation/nova/core_db/migrations/5_6_AddNfts.kt
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,27 @@ | ||
| package io.novafoundation.nova.core_db.migrations | ||
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| import androidx.room.migration.Migration | ||
| import androidx.sqlite.db.SupportSQLiteDatabase | ||
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| val AddNfts_5_6 = object : Migration(5, 6) { | ||
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| override fun migrate(database: SupportSQLiteDatabase) { | ||
| database.execSQL(""" | ||
| CREATE TABLE IF NOT EXISTS `nfts` ( | ||
| `identifier` TEXT NOT NULL, | ||
| `metaId` INTEGER NOT NULL, | ||
| `chainId` TEXT NOT NULL, | ||
| `collectionId` TEXT, | ||
| `instanceId` TEXT, | ||
| `metadata` BLOB, | ||
| `name` TEXT, | ||
| `label` TEXT, | ||
| `media` TEXT, | ||
| `price` TEXT, | ||
| `type` TEXT NOT NULL, | ||
| PRIMARY KEY(`identifier`)) | ||
| """ | ||
| ) | ||
| database.execSQL("CREATE INDEX IF NOT EXISTS `index_nfts_metaId` ON `nfts` (`metaId`)") | ||
| } | ||
| } |
42 changes: 42 additions & 0 deletions
42
core-db/src/main/java/io/novafoundation/nova/core_db/model/NftLocal.kt
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,42 @@ | ||
| package io.novafoundation.nova.core_db.model | ||
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| import androidx.room.ColumnInfo | ||
| import androidx.room.Entity | ||
| import androidx.room.PrimaryKey | ||
| import io.novafoundation.nova.common.utils.Identifiable | ||
| import io.novafoundation.nova.common.utils.optionalContentEquals | ||
| import java.math.BigInteger | ||
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| @Entity(tableName = "nfts") | ||
| class NftLocal( | ||
| @PrimaryKey | ||
| override val identifier: String, | ||
| @ColumnInfo(index = true) | ||
| val metaId: Long, | ||
| val chainId: String, | ||
| val collectionId: String?, | ||
| val instanceId: String?, | ||
| val metadata: ByteArray?, | ||
| // --- metadata fields --- | ||
| // name is always be present. null in case it is not loaded (nft is partially loaded) | ||
| val name: String? = null, | ||
| val label: String? = null, | ||
| val media: String? = null, | ||
| val price: BigInteger? = null, | ||
| // --- metadata fields --- | ||
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| val type: Type | ||
| ): Identifiable { | ||
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| enum class Type { | ||
| UNIQUES, RMRK1 | ||
| } | ||
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| override fun equals(other: Any?): Boolean { | ||
| return other is NftLocal && | ||
| identifier == other.identifier && | ||
| // metadata is either direct data or a link to immutable distributed storage | ||
| metadata.optionalContentEquals(other.metadata) | ||
| && price == other.price | ||
| } | ||
| } |
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