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For mozilla-mobile#26423: add wallpaper metadata fetcher
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app/src/main/java/org/mozilla/fenix/wallpapers/WallpaperMetadataFetcher.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,97 @@ | ||
| /* This Source Code Form is subject to the terms of the Mozilla Public | ||
| * License, v. 2.0. If a copy of the MPL was not distributed with this | ||
| * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | ||
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| package org.mozilla.fenix.wallpapers | ||
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| import kotlinx.coroutines.Dispatchers | ||
| import kotlinx.coroutines.withContext | ||
| import mozilla.components.concept.fetch.Client | ||
| import mozilla.components.concept.fetch.Request | ||
| import org.json.JSONArray | ||
| import org.json.JSONObject | ||
| import org.mozilla.fenix.BuildConfig | ||
| import java.text.SimpleDateFormat | ||
| import java.util.Date | ||
| import java.util.Locale | ||
|
|
||
| /** | ||
| * Utility class for downloading wallpaper metadata from the remote server. | ||
| * | ||
| * @property client The client that will be used to fetch metadata. | ||
| */ | ||
| class WallpaperMetadataFetcher( | ||
| private val client: Client | ||
| ) { | ||
| private val metadataUrl = BuildConfig.WALLPAPER_URL.substringBefore("android") + | ||
| "metadata/v$currentJsonVersion/wallpapers.json" | ||
|
|
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| /** | ||
| * Downloads the list of wallpapers from the remote source. Failures will return an empty list. | ||
| */ | ||
| suspend fun downloadWallpaperList(): List<Wallpaper> = withContext(Dispatchers.IO) { | ||
| Result.runCatching { | ||
| val request = Request(url = metadataUrl, method = Request.Method.GET) | ||
| val response = client.fetch(request) | ||
| response.body.useBufferedReader { | ||
| val json = it.readText() | ||
| JSONObject(json).parseAsWallpapers() | ||
| } | ||
| }.getOrElse { listOf() } | ||
| } | ||
|
|
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| private fun JSONObject.parseAsWallpapers(): List<Wallpaper> = with(getJSONArray("collections")) { | ||
| (0 until length()).map { index -> | ||
| getJSONObject(index).toCollectionOfWallpapers() | ||
| }.flatten() | ||
| } | ||
|
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| private fun JSONObject.toCollectionOfWallpapers(): List<Wallpaper> { | ||
| val collectionId = getString("id") | ||
| val availableLocales = optJSONArray("available-locales")?.getAvailableLocales() | ||
| val availabilityRange = optJSONObject("availability-range")?.getAvailabilityRange() | ||
| val learnMoreUrl = optString("learn-more-url") | ||
| val collection = Wallpaper.Collection( | ||
| name = collectionId, | ||
| availableLocales = availableLocales, | ||
| startDate = availabilityRange?.first, | ||
| endDate = availabilityRange?.second, | ||
| learnMoreUrl = learnMoreUrl, | ||
| ) | ||
| return getJSONArray("wallpapers").toWallpaperList(collection) | ||
| } | ||
|
|
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| private fun JSONArray.getAvailableLocales(): List<String>? = | ||
| (0 until length()).map { getString(it) } | ||
|
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| private fun JSONObject.getAvailabilityRange(): Pair<Date, Date>? { | ||
| val formatter = SimpleDateFormat("yyyy-MM-dd", Locale.US) | ||
| return Result.runCatching { | ||
| formatter.parse(getString("start"))!! to formatter.parse(getString("end"))!! | ||
| }.getOrNull() | ||
| } | ||
|
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| private fun JSONArray.toWallpaperList(collection: Wallpaper.Collection): List<Wallpaper> = | ||
| (0 until length()).map { index -> | ||
| with(getJSONObject(index)) { | ||
| Wallpaper( | ||
| name = getString("id"), | ||
| textColor = getArgbValueAsLong("text-color"), | ||
| cardColor = getArgbValueAsLong("card-color"), | ||
| collection = collection, | ||
| ) | ||
| } | ||
| } | ||
|
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| /** | ||
| * The wallpaper metadata has 6 digit hex color codes for compatibility with iOS. Since Android | ||
| * expects 8 digit ARBG values, we prepend FF for the "fully visible" version of the color | ||
| * listed in the metadata. | ||
| */ | ||
| private fun JSONObject.getArgbValueAsLong(propName: String): Long = "FF${getString(propName)}" | ||
| .toLong(radix = 16) | ||
|
|
||
| companion object { | ||
| internal const val currentJsonVersion = 1 | ||
| } | ||
| } |
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