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Merge pull request #1083 from B13rg/json-export
Include thread json in thread export methods
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140 changes: 140 additions & 0 deletions
140
.../main/java/com/github/k1rakishou/chan/core/usecase/ExportDownloadedThreadAsJsonUseCase.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,140 @@ | ||
| package com.github.k1rakishou.chan.core.usecase | ||
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| import android.content.Context | ||
| import android.net.Uri | ||
| import com.github.k1rakishou.chan.features.thread_downloading.ThreadDownloadingDelegate | ||
| import com.github.k1rakishou.common.AppConstants | ||
| import com.github.k1rakishou.common.ModularResult | ||
| import com.github.k1rakishou.core_logger.Logger | ||
| import com.github.k1rakishou.fsaf.FileManager | ||
| import com.github.k1rakishou.fsaf.file.AbstractFile | ||
| import com.github.k1rakishou.model.data.descriptor.ChanDescriptor | ||
| import com.github.k1rakishou.model.data.post.ChanOriginalPost | ||
| import com.github.k1rakishou.model.repository.ChanPostRepository | ||
| import com.google.gson.Gson | ||
| import kotlinx.coroutines.Dispatchers | ||
| import kotlinx.coroutines.ensureActive | ||
| import kotlinx.coroutines.runInterruptible | ||
| import kotlinx.coroutines.withContext | ||
| import java.io.ByteArrayInputStream | ||
| import java.io.File | ||
| import java.util.regex.Pattern | ||
| import java.util.zip.ZipEntry | ||
| import java.util.zip.ZipOutputStream | ||
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|
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| class ExportDownloadedThreadAsJsonUseCase( | ||
| private val appContext: Context, | ||
| private val appConstants: AppConstants, | ||
| private val gson: Gson, | ||
| private val fileManager: FileManager, | ||
| private val chanPostRepository: ChanPostRepository | ||
| ) : ISuspendUseCase<ExportDownloadedThreadAsJsonUseCase.Params, ModularResult<Unit>> { | ||
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| override suspend fun execute(parameter: Params): ModularResult<Unit> { | ||
| return ModularResult.Try { | ||
| val outputDirUri = parameter.outputDirUri | ||
| val threadDescriptors = parameter.threadDescriptors | ||
| val onUpdate = parameter.onUpdate | ||
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| withContext(Dispatchers.IO) { | ||
| withContext(Dispatchers.Main) { onUpdate(0, threadDescriptors.size) } | ||
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| threadDescriptors.forEachIndexed { index, threadDescriptor -> | ||
| ensureActive() | ||
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| val outputDir = fileManager.fromUri(outputDirUri) | ||
| ?: throw ThreadExportException("Failed to get output file for directory: \'$outputDirUri\'") | ||
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| val fileName = "${threadDescriptor.siteName()}_${threadDescriptor.boardCode()}_${threadDescriptor.threadNo}_json.zip" | ||
| val outputFile = fileManager.createFile(outputDir, fileName) | ||
| ?: throw ThreadExportException("Failed to create output file \'$fileName\' in directory \'${outputDir}\'") | ||
|
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| try { | ||
| exportThreadAsJson(outputFile, threadDescriptor) | ||
| } catch (error: Throwable) { | ||
| fileManager.fromUri(outputDirUri)?.let { file -> | ||
| if (fileManager.isFile(file)) { | ||
| fileManager.delete(file) | ||
| } | ||
| } | ||
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| throw error | ||
| } | ||
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| withContext(Dispatchers.Main) { onUpdate(index + 1, threadDescriptors.size) } | ||
| } | ||
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| withContext(Dispatchers.Main) { onUpdate(threadDescriptors.size, threadDescriptors.size) } | ||
| } | ||
| } | ||
| } | ||
|
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| private suspend fun exportThreadAsJson( | ||
| outputFile: AbstractFile, | ||
| threadDescriptor: ChanDescriptor.ThreadDescriptor | ||
| ) { | ||
| val postsLoadResult = chanPostRepository.getThreadPostsFromDatabase(threadDescriptor) | ||
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| val chanPosts = if (postsLoadResult is ModularResult.Error) { | ||
| throw postsLoadResult.error | ||
| } else { | ||
| postsLoadResult as ModularResult.Value | ||
| postsLoadResult.value.sortedBy { post -> post.postNo() } | ||
| } | ||
|
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| if (chanPosts.isEmpty()) { | ||
| throw ThreadExportException("Failed to load posts to export") | ||
| } | ||
|
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| if (chanPosts.first() !is ChanOriginalPost) { | ||
| throw ThreadExportException("First post is not OP") | ||
| } | ||
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| val outputFileUri = outputFile.getFullPath() | ||
| Logger.d(TAG, "exportThreadAsJson exporting ${chanPosts.size} posts into file '$outputFileUri'") | ||
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| val outputStream = fileManager.getOutputStream(outputFile) | ||
| if (outputStream == null) { | ||
| throw ThreadExportException("Failed to open output stream for file '${outputFileUri}'") | ||
| } | ||
|
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| runInterruptible { | ||
| outputStream.use { os -> | ||
| ZipOutputStream(os).use { zos -> | ||
| zos.putNextEntry(ZipEntry("thread_data.json")) | ||
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| ByteArrayInputStream(gson.toJson(chanPosts).toByteArray()) | ||
| .use { postsJsonByteArray -> postsJsonByteArray.copyTo(zos) } | ||
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| val threadMediaDirName = ThreadDownloadingDelegate.formatDirectoryName(threadDescriptor) | ||
| val threadMediaDir = File(appConstants.threadDownloaderCacheDir, threadMediaDirName) | ||
| threadMediaDir.listFiles()?.forEach { mediaFile -> | ||
| // Use this to skip exporting thumbnails | ||
| val matcher = MEDIA_EXCLUDE_PATTERN.matcher(mediaFile.name) | ||
| if (matcher.matches()) return@forEach | ||
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| zos.putNextEntry(ZipEntry(mediaFile.name)) | ||
| mediaFile.inputStream().use { mediaFileSteam -> | ||
| mediaFileSteam.copyTo(zos) | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
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| Logger.d(TAG, "exportThreadAsJson done") | ||
| } | ||
|
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| class ThreadExportException(message: String) : Exception(message) | ||
|
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| data class Params( | ||
| val outputDirUri: Uri, | ||
| val threadDescriptors: List<ChanDescriptor.ThreadDescriptor>, | ||
| val onUpdate: (Int, Int) -> Unit | ||
| ) | ||
|
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| companion object { | ||
| private const val TAG = "ExportDownloadedThreadAsJsonUseCase" | ||
| private val MEDIA_EXCLUDE_PATTERN = Pattern.compile(".*s\\..+") | ||
| } | ||
| } |
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