eng-pad/app/src/main/kotlin/net/metacircular/engpad/undo/StrokeActions.kt

package net.metacircular.engpad.undo

import net.metacircular.engpad.data.model.Stroke
import net.metacircular.engpad.data.repository.PageRepository

class AddStrokeAction(
    private val stroke: Stroke,
    private val repository: PageRepository,
    private val onExecute: (Stroke) -> Unit,
    private val onUndo: (Long) -> Unit,
) : UndoableAction {
    override val description = "Add stroke"
    private var insertedId: Long = 0

    override suspend fun execute() {
        insertedId = repository.addStroke(stroke)
        onExecute(stroke.copy(id = insertedId))
    }

    override suspend fun undo() {
        repository.deleteStroke(insertedId)
        onUndo(insertedId)
    }
}

class DeleteStrokeAction(
    private val stroke: Stroke,
    private val repository: PageRepository,
    private val onExecute: (Long) -> Unit,
    private val onUndo: (Stroke) -> Unit,
) : UndoableAction {
    override val description = "Delete stroke"

    override suspend fun execute() {
        repository.deleteStroke(stroke.id)
        onExecute(stroke.id)
    }

    override suspend fun undo() {
        val id = repository.addStroke(stroke)
        onUndo(stroke.copy(id = id))
    }
}