71 lines
2.6 KiB
Kotlin
71 lines
2.6 KiB
Kotlin
package com.h.pixeldroid.fragments.feeds.cachedFeeds.postFeeds
|
|
|
|
import androidx.paging.*
|
|
import androidx.room.withTransaction
|
|
import com.h.pixeldroid.db.AppDatabase
|
|
import com.h.pixeldroid.di.PixelfedAPIHolder
|
|
import com.h.pixeldroid.db.entities.HomeStatusDatabaseEntity
|
|
import retrofit2.HttpException
|
|
import java.io.IOException
|
|
import javax.inject.Inject
|
|
|
|
|
|
/**
|
|
* RemoteMediator for the home feed.
|
|
*
|
|
* A [RemoteMediator] defines a set of callbacks used to incrementally load data from a remote
|
|
* source into a local source wrapped by a [PagingSource], e.g., loading data from network into
|
|
* a local db cache.
|
|
*/
|
|
@OptIn(ExperimentalPagingApi::class)
|
|
class HomeFeedRemoteMediator @Inject constructor(
|
|
private val apiHolder: PixelfedAPIHolder,
|
|
private val db: AppDatabase,
|
|
) : RemoteMediator<Int, HomeStatusDatabaseEntity>() {
|
|
|
|
override suspend fun load(loadType: LoadType, state: PagingState<Int, HomeStatusDatabaseEntity>): MediatorResult {
|
|
|
|
val (max_id, min_id) = when (loadType) {
|
|
LoadType.REFRESH -> {
|
|
Pair<String?, String?>(null, null)
|
|
}
|
|
LoadType.PREPEND -> {
|
|
//No prepend for the moment, might be nice to add later
|
|
return MediatorResult.Success(endOfPaginationReached = true)
|
|
}
|
|
LoadType.APPEND -> {
|
|
Pair<String?, String?>(state.lastItemOrNull()?.id, null)
|
|
}
|
|
|
|
}
|
|
|
|
try {
|
|
val user = db.userDao().getActiveUser()!!
|
|
val api = apiHolder.api ?: apiHolder.setDomainToCurrentUser(db)
|
|
val accessToken = user.accessToken.orEmpty()
|
|
|
|
val apiResponse = api.timelineHome( "Bearer $accessToken",
|
|
max_id= max_id, min_id = min_id,
|
|
limit = state.config.pageSize.toString())
|
|
|
|
val dbObjects = apiResponse.map{
|
|
HomeStatusDatabaseEntity(user.user_id, user.instance_uri, it)
|
|
}
|
|
|
|
val endOfPaginationReached = apiResponse.isEmpty()
|
|
|
|
db.withTransaction {
|
|
// clear table in the database
|
|
if (loadType == LoadType.REFRESH) {
|
|
db.homePostDao().clearFeedContent()
|
|
}
|
|
db.homePostDao().insertAll(dbObjects)
|
|
}
|
|
return MediatorResult.Success(endOfPaginationReached = endOfPaginationReached)
|
|
} catch (exception: IOException) {
|
|
return MediatorResult.Error(exception)
|
|
} catch (exception: HttpException) {
|
|
return MediatorResult.Error(exception)
|
|
}
|
|
}
|
|
} |