Updates the for you view model to support displaying a loading state when data hasn't loaded yet. This is a somewhat involved CL, because there are multiple ways in which data could be loading: We could have topics, but the feed itself could be loading after we selected a new set of topics. Change-Id: I8662140c7132b195f85e69fee8e18745829ae975pull/2/head
Alex Vanyo
3 years ago
committed by
Don Turner
parent
2e4c763db5
commit
a5f679063d
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/*
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* Copyright 2022 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.google.samples.apps.nowinandroid.feature.foryou
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/**
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* A sealed hierarchy for the user's current followed interests state.
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*/
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sealed interface FollowedInterestsState {
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/**
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* The current state is unknown (hasn't loaded yet)
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*/
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object Unknown : FollowedInterestsState
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/**
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* The user hasn't followed any interests yet.
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*/
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object None : FollowedInterestsState
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/**
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* The user has followed the given (non-empty) set of [topicIds] or [authorIds].
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*/
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data class FollowedInterests(
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val topicIds: Set<String>,
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val authorIds: Set<String>
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) : FollowedInterestsState
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}
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/*
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* Copyright 2022 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.google.samples.apps.nowinandroid.feature.foryou
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import com.google.samples.apps.nowinandroid.core.model.data.SaveableNewsResource
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/**
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* A sealed hierarchy describing the state of the feed on the for you screen.
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*/
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sealed interface ForYouFeedState {
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/**
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* The feed is still loading.
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*/
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object Loading : ForYouFeedState
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/**
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* The feed is loaded with the given list of news resources.
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*/
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data class Success(
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/**
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* The list of news resources contained in this [PopulatedFeed].
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*/
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val feed: List<SaveableNewsResource>
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) : ForYouFeedState
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}
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/*
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* Copyright 2022 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.google.samples.apps.nowinandroid.feature.foryou
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import com.google.samples.apps.nowinandroid.core.model.data.FollowableAuthor
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import com.google.samples.apps.nowinandroid.core.model.data.FollowableTopic
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/**
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* A sealed hierarchy describing the interests selection state for the for you screen.
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*/
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sealed interface ForYouInterestsSelectionState {
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/**
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* The interests selection state is loading.
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*/
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object Loading : ForYouInterestsSelectionState
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/**
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* There is no interests selection state.
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*/
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object NoInterestsSelection : ForYouInterestsSelectionState
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/**
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* There is a interests selection state, with the given lists of topics and authors.
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*/
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data class WithInterestsSelection(
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val topics: List<FollowableTopic>,
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val authors: List<FollowableAuthor>
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) : ForYouInterestsSelectionState {
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/**
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* True if the current in-progress selection can be saved.
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*/
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val canSaveInterests: Boolean get() =
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topics.any { it.isFollowed } || authors.any { it.isFollowed }
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}
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}
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