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Code Issues Releases Wiki Activity

Refactor BookDownloadManager to Kotlin

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I don't like that I had to make one static method a class method, but I like how much cleaner everything else is!
This commit is contained in:
Bradlee Speice
2014-11-11 22:55:31 -05:00
parent 86adeb4951
commit 7cfe273cb6
5 changed files with 120 additions and 177 deletions
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108
app/src/main/kotlin/org/bspeice/minimalbible/activity/downloader/manager/BookDownloadManager.kt Normal file
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package org.bspeice.minimalbible.activity.downloader.manager
import android.util.Log;
import org.crosswire.common.progress.JobManager;
import org.crosswire.common.progress.WorkEvent;
import org.crosswire.common.progress.WorkListener;
import org.crosswire.jsword.book.Book;
import org.crosswire.jsword.book.Books;
import org.crosswire.jsword.book.BooksEvent;
import org.crosswire.jsword.book.BooksListener;
import rx.Observable;
import rx.schedulers.Schedulers;
import rx.subjects.PublishSubject;
/**
* Single point of authority for what is being downloaded and its progress
*/
//TODO: Install indexes for Bibles
class BookDownloadManager(val installedBooks: Books, val rM: RefreshManager) :
WorkListener, BooksListener {
/**
* Cached copy of downloads in progress so views displaying this info can get it quickly.
*/
// TODO: Combine to one map
var bookMappings: MutableMap<String, Book> = hashMapOf()
var inProgressDownloads: MutableMap<Book, DLProgressEvent> = hashMapOf()
val downloadEvents: PublishSubject<DLProgressEvent> = PublishSubject.create();
{
JobManager.addWorkListener(this)
installedBooks.addBooksListener(this)
}
/**
* Build what the installer creates the job name as.
* This technically could be static, but Kotlin won't have none of that.
*
* @param b The book to predict the download job name of
* @return The name of the job that will/is download/ing this book
*/
fun getJobId(b: Book) = "INSTALL_BOOK-" + b.getInitials()
fun installBook(b: Book) {
downloadBook(b)
addJob(getJobId(b), b)
downloadEvents onNext DLProgressEvent(DLProgressEvent.PROGRESS_BEGINNING, b)
}
fun addJob(jobId: String, b: Book) {
bookMappings.put(jobId, b)
}
fun downloadBook(b: Book) {
// First, look up where the Book came from
Observable.just(rM installerFromBook b)
.subscribeOn(Schedulers.io())
.subscribe { it.toBlocking().first().install(b) }
downloadEvents onNext DLProgressEvent(DLProgressEvent.PROGRESS_BEGINNING, b)
}
// TODO: I have a strange feeling I can simplify this further...
override fun workProgressed(ev: WorkEvent) {
val job = ev.getJob()
bookMappings.filter { it.getKey() == job.getJobID() }
.map {
val event = DLProgressEvent(job.getWorkDone() / job.getTotalWork() * 100,
it.getValue())
downloadEvents onNext event
if (job.getWorkDone() == job.getTotalWork()) {
inProgressDownloads remove bookMappings.get(job.getJobID())
bookMappings remove job.getJobID()
} else
inProgressDownloads.put(it.getValue(), event)
}
}
/**
* Check the status of a book download in progress.
* @param b The book to get the current progress of
* @return The most recent DownloadProgressEvent for the book, or null if not downloading
*/
fun getDownloadProgress(b: Book) = inProgressDownloads.get(b)
override fun workStateChanged(ev: WorkEvent) {
Log.d("BookDownloadManager", ev.toString())
}
override fun bookAdded(booksEvent: BooksEvent) {
// It's possible the install finished before we received a progress event for it,
// we handle that case here.
val b = booksEvent.getBook()
Log.d("BookDownloadManager", "Book added: " + b.getName())
inProgressDownloads remove b
// Not sure why, but the inProgressDownloads might not have our book,
// so we always trigger the PROGRESS_COMPLETE event.
downloadEvents onNext DLProgressEvent(DLProgressEvent.PROGRESS_COMPLETE, b)
}
override fun bookRemoved(booksEvent: BooksEvent) {
}
}