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package com.bselzer.ktx.db.metadata

import com.bselzer.ktx.value.identifier.Identifiable
import org.kodein.db.Options
import org.kodein.db.model.orm.Metadata
import org.kodein.db.model.orm.MetadataExtractor

/**
 * A metadata extractor for [Identifiable] models.
 */
class IdentifiableMetadataExtractor : MetadataExtractor {
    override fun extractMetadata(model: Any, vararg options: Options.Puts): Metadata? = when (model) {
        is Identifiable<*, *> -> {
            val id = model.id.value
            if (id == null) null else Metadata(id)
        }
        else -> null
    }
}