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Breadcrumbs: nicer algorithm

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This commit is contained in:
Benoit Marty 2019-12-05 22:05:37 +01:00
parent 65333e6031
commit 0768bd5c88
1 changed files with 18 additions and 24 deletions
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42
matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/user/accountdata/UpdateBreadcrumbsTask.kt
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@ -24,13 +24,12 @@ import im.vector.matrix.android.internal.task.Task
import im.vector.matrix.android.internal.util.fetchCopied
import javax.inject.Inject
// Use same arbitrary value than Riot-Web
// Use the same arbitrary value than Riot-Web
private const val MAX_BREADCRUMBS_ROOMS_NUMBER = 20
internal interface UpdateBreadcrumbsTask : Task<UpdateBreadcrumbsTask.Params, Unit> {
data class Params(
// Last seen roomId
val roomId: String
val newTopRoomId: String
)
}
@ -41,32 +40,27 @@ internal class DefaultUpdateBreadcrumbsTask @Inject constructor(
) : UpdateBreadcrumbsTask {
override suspend fun execute(params: UpdateBreadcrumbsTask.Params) {
// Get the current breadcrumbs in DB
val bc = monarchy.fetchCopied { realm ->
// Get the breadcrumbs entity, if any
BreadcrumbsEntity.get(realm)
}
// Modify the list to add the roomId first
val newRecentRoomIds = if (bc != null) {
// Ensure the roomId is not already in the list
bc.recentRoomIds.remove(params.roomId)
// Add the room at first position
bc.recentRoomIds.add(0, params.roomId)
bc.recentRoomIds.take(MAX_BREADCRUMBS_ROOMS_NUMBER)
} else {
// FIXME It can remove the previous breadcrumbs, if not synced yet
listOf(params.roomId)
}
val newBreadcrumbs =
// Get the breadcrumbs entity, if any
monarchy.fetchCopied { BreadcrumbsEntity.get(it) }
?.recentRoomIds
?.apply {
// Modify the list to add the newTopRoomId first
// Ensure the roomId is not already in the list
remove(params.newTopRoomId)
// Add the room at first position
add(0, params.newTopRoomId)
}
?.take(MAX_BREADCRUMBS_ROOMS_NUMBER)
?: listOf(params.newTopRoomId)
// Update the DB locally, do not wait for the sync
saveBreadcrumbsTask.execute(SaveBreadcrumbsTask.Params(newRecentRoomIds))
saveBreadcrumbsTask.execute(SaveBreadcrumbsTask.Params(newBreadcrumbs))
// FIXME It can remove the previous breadcrumbs, if not synced yet
// And update account data
updateUserAccountDataTask.execute(UpdateUserAccountDataTask.BreadcrumbsParams(
breadcrumbsContent = BreadcrumbsContent(
newRecentRoomIds
)
breadcrumbsContent = BreadcrumbsContent(newBreadcrumbs)
))
}
}