msfjarvis/compose-lobsters
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refactor(android): leverage assisted inject for LobstersPagingSource

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Harsh Shandilya 2022-09-10 02:11:27 +05:30
parent 59b35a9255
commit 2afbc73bd4
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2 changed files with 17 additions and 7 deletions
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17
android/src/main/kotlin/dev/msfjarvis/claw/android/paging/LobstersPagingSource.kt
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@ -2,13 +2,19 @@ package dev.msfjarvis.claw.android.paging
import androidx.paging.PagingSource import androidx.paging.PagingSource
import androidx.paging.PagingState import androidx.paging.PagingState
import dagger.assisted.Assisted
import dagger.assisted.AssistedFactory
import dagger.assisted.AssistedInject
import dev.msfjarvis.claw.android.injection.IODispatcher
import dev.msfjarvis.claw.model.LobstersPost import dev.msfjarvis.claw.model.LobstersPost
import kotlinx.coroutines.CoroutineDispatcher import kotlinx.coroutines.CoroutineDispatcher
import kotlinx.coroutines.withContext import kotlinx.coroutines.withContext
class LobstersPagingSource( class LobstersPagingSource
private val getMorePosts: suspend (Int) -> List<LobstersPost>, @AssistedInject
private val ioDispatcher: CoroutineDispatcher, constructor(
@Assisted private val getMorePosts: suspend (Int) -> List<LobstersPost>,
@IODispatcher private val ioDispatcher: CoroutineDispatcher,
) : PagingSource<Int, LobstersPost>() { ) : PagingSource<Int, LobstersPost>() {
override suspend fun load(params: LoadParams<Int>): LoadResult<Int, LobstersPost> { override suspend fun load(params: LoadParams<Int>): LoadResult<Int, LobstersPost> {
@ -29,4 +35,9 @@ class LobstersPagingSource(
override fun getRefreshKey(state: PagingState<Int, LobstersPost>): Int { override fun getRefreshKey(state: PagingState<Int, LobstersPost>): Int {
return state.pages.size + 1 return state.pages.size + 1
} }
@AssistedFactory
interface Factory {
fun create(getMorePosts: suspend (Int) -> List<LobstersPost>): LobstersPagingSource
}
} }

7
android/src/main/kotlin/dev/msfjarvis/claw/android/viewmodel/ClawViewModel.kt
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@ -25,19 +25,18 @@ constructor(
private val api: LobstersApi, private val api: LobstersApi,
private val savedPostsRepository: SavedPostsRepository, private val savedPostsRepository: SavedPostsRepository,
private val postDetailsRepository: PostDetailsRepository, private val postDetailsRepository: PostDetailsRepository,
private val pagingSourceFactory: LobstersPagingSource.Factory,
@IODispatcher private val ioDispatcher: CoroutineDispatcher, @IODispatcher private val ioDispatcher: CoroutineDispatcher,
) : ViewModel() { ) : ViewModel() {
private var hottestPostsPagingSource: LobstersPagingSource? = null private var hottestPostsPagingSource: LobstersPagingSource? = null
private var newestPostsPagingSource: LobstersPagingSource? = null private var newestPostsPagingSource: LobstersPagingSource? = null
private val hottestPostsPager = private val hottestPostsPager =
Pager(PagingConfig(20)) { Pager(PagingConfig(20)) {
LobstersPagingSource(api::getHottestPosts, ioDispatcher).also { pagingSourceFactory.create(api::getHottestPosts).also { hottestPostsPagingSource = it }
hottestPostsPagingSource = it
}
} }
private val newestPostsPager = private val newestPostsPager =
Pager(PagingConfig(20)) { Pager(PagingConfig(20)) {
LobstersPagingSource(api::getNewestPosts, ioDispatcher).also { newestPostsPagingSource = it } pagingSourceFactory.create(api::getHottestPosts).also { newestPostsPagingSource = it }
} }
val hottestPosts val hottestPosts