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Add image caching to SmallImageCard (#319)
* cache content card images * integrate caching in smallImageCard * add unit tests * spotless apply * address PR comments * fix failing tests * run spotless apply * add additional UTs * spotless apply * convert contentCardImageManager to object
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code/messaging/src/main/java/com/adobe/marketing/mobile/messaging/ContentCardImageManager.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,156 @@ | ||
| /* | ||
| Copyright 2024 Adobe. All rights reserved. | ||
| This file is licensed to you 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 REPRESENTATIONS | ||
| OF ANY KIND, either express or implied. See the License for the specific language | ||
| governing permissions and limitations under the License. | ||
| */ | ||
|
|
||
| package com.adobe.marketing.mobile.messaging | ||
|
|
||
| import android.graphics.Bitmap | ||
| import android.graphics.BitmapFactory | ||
| import com.adobe.marketing.mobile.aepcomposeui.utils.UIUtils | ||
| import com.adobe.marketing.mobile.messaging.MessagingConstants.CACHE_EXPIRY_TIME | ||
| import com.adobe.marketing.mobile.messaging.MessagingConstants.CONTENT_CARD_CACHE_SUBDIRECTORY | ||
| import com.adobe.marketing.mobile.services.Log | ||
| import com.adobe.marketing.mobile.services.ServiceProvider | ||
| import com.adobe.marketing.mobile.services.caching.CacheEntry | ||
| import com.adobe.marketing.mobile.services.caching.CacheExpiry | ||
| import com.adobe.marketing.mobile.services.caching.CacheResult | ||
| import com.adobe.marketing.mobile.services.caching.CacheService | ||
| import java.io.InputStream | ||
| import java.nio.ByteBuffer | ||
|
|
||
| object ContentCardImageManager { | ||
| private val SELF_TAG: String = "ContentCardManager" | ||
| private val cacheService: CacheService? = ServiceProvider.getInstance().cacheService | ||
| private val defaultCacheName: String = CONTENT_CARD_CACHE_SUBDIRECTORY | ||
|
|
||
| /** | ||
| * Fetches the image from cache if present in cache, else downloads the image from the given URL and caches it for future calls. | ||
| * | ||
| * @param imageUrl the url of the image to be fetched | ||
| * @param cacheName(optional) the name of the cache for fetching or caching the image, default value used if cache name is not provided | ||
| * @param completion is a completion callback. Result.success() method is invoked with the image bitmap fetched. In case of any failure, Result.failure() method is invoked with a throwable | ||
| * */ | ||
| fun getContentCardImageBitmap(imageUrl: String, cacheName: String? = defaultCacheName, completion: (Result<Bitmap>) -> Unit) { | ||
| val resolvedCacheName: String = cacheName ?: defaultCacheName | ||
| if (isImageCached(imageUrl, resolvedCacheName)) { | ||
| getImageBitmapFromCache(imageUrl, resolvedCacheName, completion) | ||
| } else { | ||
| downloadAndCacheImageBitmap(imageUrl, resolvedCacheName, completion) | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * Checks whether the image at given url is present in the cache or not. | ||
| * | ||
| * @param imageUrl the url of the image | ||
| * @param cacheName the name of the cache for fetching or caching the image | ||
| * @return `True` if the image is found in cache, `False` otherwise | ||
| * */ | ||
| private fun isImageCached(imageUrl: String, cacheName: String): Boolean { | ||
| val cacheValue = cacheService?.get(cacheName, imageUrl) | ||
| return cacheValue != null | ||
| } | ||
|
|
||
| /** | ||
| * Fetches the image from the cache. | ||
| * | ||
| * @param imageUrl the url of the image to be fetched | ||
| * @param cacheName the name of the cache for fetching the image | ||
| * @param completion is a completion callback. Result.success() method is invoked with the image bitmap fetched. In case of any failure, Result.failure() method is invoked with a throwable | ||
| * */ | ||
| private fun getImageBitmapFromCache(imageUrl: String, cacheName: String, completion: (Result<Bitmap>) -> Unit) { | ||
| val cachedImageBitmap: CacheResult? = cacheService?.get(cacheName, imageUrl) | ||
| val inputStream = cachedImageBitmap?.data | ||
|
|
||
| // Convert the InputStream to a Bitmap | ||
| if (inputStream != null) { | ||
| try { | ||
| completion(Result.success(BitmapFactory.decodeStream(inputStream))) | ||
| } catch (e: Exception) { | ||
| Log.warning( | ||
| MessagingConstants.LOG_TAG, | ||
| SELF_TAG, | ||
| "getImageBitmapFromCache - Unable to read cached data into a bitmap due to error: $e" | ||
| ) | ||
| completion(Result.failure(e)) | ||
| } | ||
| } else { | ||
| Log.warning( | ||
| MessagingConstants.LOG_TAG, | ||
| SELF_TAG, | ||
| "getImageBitmapFromCache - Unable to read cached data as the inputStream is null" | ||
| ) | ||
| completion(Result.failure(Exception("Unable to read cached bitmap data as the inputStream is null for the url: $imageUrl, cacheName: $cacheName"))) | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * Downloads the image from the given url and caches it. | ||
| * | ||
| * @param imageUrl the url of the image to be downloaded | ||
| * @param completion is a completion callback. Result.success() method is invoked with the image bitmap downloaded. In case of any failure, Result.failure() method is invoked with a throwable | ||
| * */ | ||
| private fun downloadAndCacheImageBitmap(imageUrl: String, cacheName: String, completion: (Result<Bitmap>) -> Unit) { | ||
| UIUtils.downloadImage(imageUrl) { | ||
| it.onSuccess { bitmap -> | ||
| val isImageCacheSuccessful = cacheImage(bitmap, imageUrl, cacheName) | ||
| if (!isImageCacheSuccessful) { | ||
| Log.warning( | ||
| MessagingConstants.LOG_TAG, | ||
| SELF_TAG, | ||
| "downloadAndCacheImageBitmap - Image downloaded but failed to cache the image from url: $imageUrl" | ||
| ) | ||
| } | ||
| completion(Result.success(bitmap)) | ||
| } | ||
| it.onFailure { failure -> | ||
| Log.warning( | ||
| MessagingConstants.LOG_TAG, | ||
| SELF_TAG, | ||
| "downloadAndCacheImageBitmap - Unable to download image from url: $imageUrl" | ||
| ) | ||
| completion(Result.failure(failure)) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * Caches the given image. | ||
| * | ||
| * @param imageBitmap image to be cached | ||
| * @param imageName the unique `key` for storing the image in cache | ||
| * @param cacheName name of the cache where cache entry is to be created | ||
| * | ||
| * @return `True` if image is caches successfully, `False` otherwise | ||
| * */ | ||
| private fun cacheImage(imageBitmap: Bitmap, imageName: String, cacheName: String): Boolean { | ||
| try { | ||
| val imageInputStream: InputStream = imageBitmap.let { bitmap -> | ||
| val byteArray = ByteArray(bitmap.byteCount) | ||
| val buffer = ByteBuffer.wrap(byteArray) | ||
| bitmap.copyPixelsToBuffer(buffer) | ||
| buffer.rewind() // Reset the buffer position to the beginning | ||
| byteArray.inputStream() // Create InputStream from byte array | ||
| } | ||
|
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||
| val cacheEntry = CacheEntry(imageInputStream, CacheExpiry.after(CACHE_EXPIRY_TIME), null) | ||
| cacheService?.set(cacheName, imageName, cacheEntry) | ||
|
|
||
| return true | ||
| } catch (e: Exception) { | ||
| Log.warning( | ||
| MessagingConstants.LOG_TAG, | ||
| SELF_TAG, | ||
| "cacheImage - An unexpected error occurred while caching the downloaded image: \n ${e.localizedMessage}" | ||
| ) | ||
| return false | ||
| } | ||
| } | ||
| } |
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