kopia lustrzana https://github.com/vitorpamplona/amethyst
81 wiersze
3.0 KiB
Kotlin
81 wiersze
3.0 KiB
Kotlin
/**
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* Copyright (c) 2024 Vitor Pamplona
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of
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* this software and associated documentation files (the "Software"), to deal in
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* the Software without restriction, including without limitation the rights to use,
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* copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
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* Software, and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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package com.vitorpamplona.amethyst.model
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import android.util.LruCache
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import androidx.compose.runtime.Stable
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import com.vitorpamplona.amethyst.service.previews.BahaUrlPreview
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import com.vitorpamplona.amethyst.service.previews.IUrlPreviewCallback
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import com.vitorpamplona.amethyst.service.previews.UrlInfoItem
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import com.vitorpamplona.amethyst.ui.components.UrlPreviewState
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@Stable
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object UrlCachedPreviewer {
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var cache = LruCache<String, UrlPreviewState>(100)
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private set
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suspend fun previewInfo(
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url: String,
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onReady: suspend (UrlPreviewState) -> Unit,
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) {
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cache[url]?.let {
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onReady(it)
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return
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}
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BahaUrlPreview(
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url,
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object : IUrlPreviewCallback {
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override suspend fun onComplete(urlInfo: UrlInfoItem) {
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cache[url]?.let {
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if (it is UrlPreviewState.Loaded || it is UrlPreviewState.Empty) {
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onReady(it)
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return
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}
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}
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val state =
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if (urlInfo.fetchComplete() && urlInfo.url == url) {
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UrlPreviewState.Loaded(urlInfo)
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} else {
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UrlPreviewState.Empty
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}
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cache.put(url, state)
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onReady(state)
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}
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override suspend fun onFailed(throwable: Throwable) {
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cache[url]?.let {
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onReady(it)
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return
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}
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val state = UrlPreviewState.Error(throwable.message ?: "Error Loading url preview")
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cache.put(url, state)
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onReady(state)
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}
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},
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)
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.fetchUrlPreview()
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}
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}
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