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/*
* Copyright (C) 2023 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.google.android.wallpaper.weathereffects.data.repository
import android.content.Context
import android.util.Log
import com.google.android.wallpaper.weathereffects.shared.model.WallpaperFileModel
import com.google.android.wallpaper.weathereffects.shared.model.WallpaperImageModel
import javax.inject.Inject
import javax.inject.Singleton
import kotlinx.coroutines.flow.MutableStateFlow
import kotlinx.coroutines.flow.StateFlow
import kotlinx.coroutines.flow.asStateFlow
@Singleton
class WeatherEffectsRepository @Inject constructor(
private val context: Context,
) {
private val _wallpaperImage = MutableStateFlow<WallpaperImageModel?>(null)
val wallpaperImage: StateFlow<WallpaperImageModel?> = _wallpaperImage.asStateFlow()
/**
* Generates or updates a wallpaper from the provided [wallpaperFileModel].
*/
suspend fun updateWallpaper(wallpaperFileModel: WallpaperFileModel) {
try {
// Use the existing images if the foreground and background are not supplied.
var fgBitmap = _wallpaperImage.value?.foreground
var bgBitmap = _wallpaperImage.value?.background
wallpaperFileModel.foregroundAbsolutePath?.let {
WallpaperFileUtils.importBitmapFromAbsolutePath(it)?.let { newFg ->
fgBitmap = newFg
}
}
wallpaperFileModel.backgroundAbsolutePath?.let {
WallpaperFileUtils.importBitmapFromAbsolutePath(it)?.let { newBg ->
bgBitmap = newBg
}
}
if (fgBitmap == null || bgBitmap == null) {
Log.w(TAG, "Cannot update wallpaper. asset: $wallpaperFileModel")
return
}
val foreground = fgBitmap!!
val background = bgBitmap!!
var success = true
// TODO: Only persist assets when the wallpaper is applied.
success = success and WallpaperFileUtils.export(
context,
WallpaperFileUtils.FG_FILE_NAME,
foreground,
)
success = success and WallpaperFileUtils.export(
context,
WallpaperFileUtils.BG_FILE_NAME,
background,
)
if (!success) {
Log.e(TAG, "Failed to export assets during wallpaper generation")
return
}
_wallpaperImage.value = WallpaperImageModel(
foreground,
background,
wallpaperFileModel.weatherEffect,
)
} catch (e: RuntimeException) {
Log.e(TAG, "Unable to load wallpaper: ", e)
null
} catch (e: OutOfMemoryError) {
Log.e(TAG, "Unable to load wallpaper: ", e)
null
}
}
/**
* Loads wallpaper from the persisted files in local storage.
* This assumes wallpaper assets exist in local storage under fixed names.
*/
suspend fun loadWallpaperFromLocalStorage() {
try {
val fgBitmap = WallpaperFileUtils.importBitmapFromLocalStorage(
WallpaperFileUtils.FG_FILE_NAME, context
)
val bgBitmap = WallpaperFileUtils.importBitmapFromLocalStorage(
WallpaperFileUtils.BG_FILE_NAME, context
)
if (fgBitmap == null || bgBitmap == null) {
Log.w(TAG, "Cannot load wallpaper from local storage.")
return
}
_wallpaperImage.value = WallpaperImageModel(
fgBitmap,
bgBitmap,
// TODO: Add new API to change weather type dynamically
)
} catch (e: RuntimeException) {
Log.e(TAG, "Unable to load wallpaper: ", e)
null
} catch (e: OutOfMemoryError) {
Log.e(TAG, "Unable to load wallpaper: ", e)
null
}
}
companion object {
private const val TAG = "WeatherEffectsRepository"
}
}
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