Refactor main menu to Kotlin

So much less code to write and maintain... love it.

app/src/main/java/org/bspeice/minimalbible/activity/downloader/manager/InstalledManager.java

@@ -14,8 +14,6 @@ import java.util.List;
 import javax.inject.Inject;
 import javax.inject.Singleton;
 
-import rx.Observable;
-
 /**
  * Manager to keep track of which books have been installed
  */
@@ -23,6 +21,7 @@ import rx.Observable;
 public class InstalledManager implements BooksListener {
 
     @Inject Books installedBooks;
+    // TODO: Why is this injected if we initialize in the constructor?
     @Inject List<Book> installedBooksList;
 
     private String TAG = "InstalledManager";
@@ -38,12 +37,6 @@ public class InstalledManager implements BooksListener {
         return installedBooksList.contains(b);
     }
 
-    public Observable<Book> getInstalledBooks() {
-        // This method is needed to provide a fresher copy of what's installed
-        // than Books.getInstalled() does.
-        return Observable.from(installedBooksList);
-    }
-
     @Override
     public void bookAdded(BooksEvent booksEvent) {
         Log.d(TAG, "Book added: " + booksEvent.getBook().toString());

app/src/main/java/org/bspeice/minimalbible/activity/navigation/ExpListNavAdapter.java

@@ -1,185 +0,0 @@
-package org.bspeice.minimalbible.activity.navigation;
-
-import android.content.Context;
-import android.view.LayoutInflater;
-import android.view.View;
-import android.view.ViewGroup;
-import android.widget.BaseExpandableListAdapter;
-import android.widget.TextView;
-
-import org.bspeice.minimalbible.R;
-
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-
-import butterknife.ButterKnife;
-import butterknife.InjectView;
-
-/**
- * ExpandableListView Navigation Drawer
- * T1 represents Group objects, T2 is child objects
- * Not sure if I'll ever actually need to re-use this, but go ahead and make it generic.
- * TODO: Document this.
- */
-public class ExpListNavAdapter<T1, T2> extends BaseExpandableListAdapter {
-
-    // Now we could technically implement this structure using a LinkedHashMap, but
-    // it's easier both to understand and program if we implement this using two maps.
-    Map<Integer, T1> indexableBibleBooks;
-    Map<T1, List<T2>> chaptersForBook;
-
-    private int groupHighlighted;
-    private int childHighlighted;
-
-    public ExpListNavAdapter(List<T1> groups, Map<T1, List<T2>> children) {
-
-        // Let the map know ahead of time how big it will be
-        // int bookCount = versification.getBookCount();
-        indexableBibleBooks = new HashMap<Integer, T1>(groups.size());
-        chaptersForBook = new HashMap<T1, List<T2>>(groups.size());
-
-        // Is it terrible that I don't like using an actual for loop?
-        for (int index = 0; index < groups.size(); index++) {
-            T1 gItem = groups.get(index);
-            indexableBibleBooks.put(index, gItem);
-            chaptersForBook.put(gItem, children.get(gItem));
-        }
-    }
-
-    @Override
-    public int getGroupCount() {
-        return indexableBibleBooks.size();
-    }
-
-    @Override
-    public int getChildrenCount(int i) {
-        return chaptersForBook.get(indexableBibleBooks.get(i)).size();
-    }
-
-    @Override
-    public T1 getGroup(int i) {
-        return indexableBibleBooks.get(i);
-    }
-
-    /**
-     * @param i  The group position
-     * @param i2 The child position
-     * @return The child chapter value
-     */
-    @Override
-    public T2 getChild(int i, int i2) {
-        return chaptersForBook.get(indexableBibleBooks.get(i)).get(i2);
-    }
-
-    @Override
-    public long getGroupId(int i) {
-        return i;
-    }
-
-    @Override
-    public long getChildId(int i, int i2) {
-        return i2;
-    }
-
-    @Override
-    public boolean hasStableIds() {
-        return true;
-    }
-
-    /**
-     * Get the views for this group
-     *
-     * @param position
-     * @param expanded
-     * @param convertView
-     * @param parent
-     * @return
-     */
-    @Override
-    public View getGroupView(int position, boolean expanded,
-                             View convertView, ViewGroup parent) {
-        NavItemHolder<T1> bookHolder;
-        if (convertView == null || convertView.getTag() == null) {
-            LayoutInflater inflater = (LayoutInflater) parent.getContext()
-                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
-            convertView = inflater.inflate(R.layout.list_navigation_drawer,
-                    parent, false);
-            bookHolder = new NavItemHolder<T1>(convertView);
-            convertView.setTag(bookHolder);
-        } else {
-            bookHolder = (NavItemHolder<T1>) convertView.getTag();
-        }
-
-        bookHolder.bind(getGroup(position), position == groupHighlighted);
-        return convertView;
-    }
-
-    /**
-     * Get the view for a child
-     *
-     * @param groupPosition
-     * @param childPosition
-     * @param isLastChild
-     * @param convertView
-     * @param parent
-     * @return
-     */
-    @Override
-    public View getChildView(int groupPosition, int childPosition,
-                             boolean isLastChild, View convertView, ViewGroup parent) {
-        NavItemHolder<T2> chapterHolder;
-        if (convertView == null || convertView.getTag() == null) {
-            LayoutInflater inflater = (LayoutInflater) parent.getContext()
-                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
-            convertView = inflater.inflate(R.layout.list_navigation_drawer,
-                    parent, false);
-            chapterHolder = new NavItemHolder<T2>(convertView);
-            convertView.setTag(chapterHolder);
-        } else {
-            chapterHolder = (NavItemHolder<T2>) convertView.getTag();
-        }
-
-        chapterHolder.bind(getChild(groupPosition, childPosition),
-                childPosition == childHighlighted);
-        return convertView;
-    }
-
-    @Override
-    public boolean isChildSelectable(int i, int i2) {
-        return true;
-    }
-
-    public void setGroupHighlighted(int groupHighlighted) {
-        this.groupHighlighted = groupHighlighted;
-    }
-
-    public void setChildHighlighted(int childHighlighted) {
-        this.childHighlighted = childHighlighted;
-    }
-
-    /**
-     * Class to hold elements for the navbar - doesn't matter if they're group or child.
-     * T3 is either T1 or T2, doesn't matter.
-     */
-    class NavItemHolder<T3> {
-        @InjectView(R.id.navlist_content)
-        TextView content;
-
-        View v;
-
-        public NavItemHolder(View v) {
-            this.v = v; // Needed for resolving colors below
-            ButterKnife.inject(this, v);
-        }
-
-        public void bind(T3 object, boolean highlighted) {
-            content.setText(object.toString());
-            if (highlighted) {
-                content.setTextColor(v.getResources().getColor(R.color.navbar_highlight));
-            } else {
-                content.setTextColor(v.getResources().getColor(R.color.navbar_unhighlighted));
-            }
-        }
-    }
-}

app/src/main/java/org/bspeice/minimalbible/activity/viewer/BibleViewerModules.java

@@ -2,11 +2,9 @@ package org.bspeice.minimalbible.activity.viewer;
 
 import android.util.Log;
 
-import org.bspeice.minimalbible.activity.navigation.ExpListNavAdapter;
 import org.bspeice.minimalbible.service.book.VerseLookupModules;
 import org.bspeice.minimalbible.service.manager.BookManager;
 import org.crosswire.jsword.book.Book;
-import org.crosswire.jsword.versification.VersificationUtil;
 
 import java.util.NoSuchElementException;
 import java.util.concurrent.atomic.AtomicReference;
@@ -21,17 +19,17 @@ import rx.functions.Action1;
 import rx.functions.Func1;
 
 /**
- * Created by bspeice on 6/18/14.
+ * Modules used for the BibleViewer activity
  */
 @Module(
         injects = {
                 BibleViewer.class,
                 BookFragment.class,
-                ExpListNavDrawerFragment.class,
+                ExpListNavDrawerFragment.class
-                ExpListNavAdapter.class
         },
         includes = VerseLookupModules.class
 )
+@SuppressWarnings("unused")
 public class BibleViewerModules {
     BibleViewer activity;
 
@@ -98,9 +96,4 @@ public class BibleViewerModules {
     BookManager bookManager() {
         return new BookManager();
     }
-
-    @Provides
-    VersificationUtil provideVersificationUtil() {
-        return new VersificationUtil();
-    }
 }

app/src/main/java/org/bspeice/minimalbible/activity/viewer/ExpListNavDrawerFragment.java

@@ -8,22 +8,12 @@ import android.widget.ExpandableListView;
 
 import org.bspeice.minimalbible.Injector;
 import org.bspeice.minimalbible.R;
-import org.bspeice.minimalbible.activity.navigation.ExpListNavAdapter;
 import org.bspeice.minimalbible.activity.navigation.NavDrawerFragment;
 import org.crosswire.jsword.book.Book;
-import org.crosswire.jsword.versification.BibleBook;
-import org.crosswire.jsword.versification.VersificationUtil;
-
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
 
 import javax.inject.Inject;
 import javax.inject.Named;
 
-import rx.functions.Action1;
-
 /**
  * ExpandableListView for managing books of the Bible.
  * We extend from @link{BaseNavigationDrawerFragment} so we can inherit some of the lifecycle
@@ -34,7 +24,6 @@ import rx.functions.Action1;
  */
 public class ExpListNavDrawerFragment extends NavDrawerFragment {
 
-    @Inject VersificationUtil vUtil;
     @Inject @Named("MainBook")
     Book mainBook;
 
@@ -48,48 +37,7 @@ public class ExpListNavDrawerFragment extends NavDrawerFragment {
 
         mActualListView = (ExpandableListView) inflater.inflate(
                 R.layout.fragment_expandable_navigation_drawer, container, false);
-        /*
+        mActualListView.setAdapter(new BibleMenu(mainBook));
-        mDrawerListView
-				.setOnItemClickListener(new AdapterView.OnItemClickListener() {
-                    @Override
-                    public void onItemClick(AdapterView<?> parent, View view,
-                                            int position, long id) {
-                        selectItem(position);
-                    }
-                });
-        */
-
-        List<String> bibleBooks;
-        if (mainBook != null) {
-            bibleBooks = vUtil.getBookNames(mainBook)
-                    .toList().toBlocking().first();
-        } else {
-            bibleBooks = new ArrayList<String>();
-        }
-
-
-        // I really don't like how we build the chapters, but I'm not adding Guava just for Range.
-        // This isn't a totally functional style map-reduce, but the reduce step is
-        // unnecessarily verbose. Like this comment.
-        final Map<String, List<Integer>> chapterMap = new HashMap<String, List<Integer>>();
-        if (mainBook != null) {
-            vUtil.getBooks(mainBook).forEach(new Action1<BibleBook>() {
-                @Override
-                public void call(BibleBook bibleBook) {
-                    int bookCount = vUtil.getChapterCount(mainBook, bibleBook);
-                    List<Integer> chapterList = new ArrayList<Integer>(bookCount);
-                    for (int i = 0; i < bookCount; i++) {
-                        chapterList.add(i + 1); // Index to chapter number
-                    }
-                    chapterMap.put(vUtil.getBookName(mainBook, bibleBook), chapterList);
-                }
-            });
-
-            ExpListNavAdapter<String, Integer> adapter =
-                    new ExpListNavAdapter<String, Integer>(bibleBooks, chapterMap);
-
-            mActualListView.setAdapter(adapter);
-        }
 
         mActualListView.setItemChecked(mCurrentSelectedPosition, true);
         return mActualListView;

app/src/main/java/org/bspeice/minimalbible/exception/NoBooksInstalledException.java

@@ -0,0 +1,7 @@
+package org.bspeice.minimalbible.exception;
+
+/**
+ * Error to be thrown when no books are currently installed.
+ */
+public class NoBooksInstalledException extends Exception {
+}

app/src/main/kotlin/org/bspeice/minimalbible/activity/viewer/BibleMenu.kt

@@ -0,0 +1,84 @@
+package org.bspeice.minimalbible.activity.viewer
+
+import android.widget.BaseExpandableListAdapter
+import android.view.View
+import android.view.ViewGroup
+import org.crosswire.jsword.book.Book
+import org.crosswire.jsword.book.getVersification
+import org.crosswire.jsword.versification.getBooks
+import org.crosswire.jsword.book.bookName
+import android.widget.TextView
+import org.bspeice.minimalbible.R
+import android.content.Context
+import android.view.LayoutInflater
+
+/**
+ * Created by bspeice on 10/24/14.
+ */
+
+class BibleMenu(val b: Book) : BaseExpandableListAdapter() {
+
+    // Map BibleBooks to the number of chapters they have
+    val menuMappings = b.getVersification().getBooks().map {
+        Pair(it, b.getVersification().getLastChapter(it))
+    }
+
+    var groupHighlighted: Int = 0
+    var childHighlighted: Int = 0
+
+    override fun getGroupCount(): Int = menuMappings.count()
+
+    override fun getChildrenCount(group: Int): Int = menuMappings.elementAt(group).component2()
+
+    override fun getGroup(group: Int): String =
+            b.bookName(menuMappings.elementAt(group).component1())
+
+    override fun getChild(group: Int, child: Int): Int = child + 1 // Index offset
+
+    override fun getGroupId(group: Int): Long = group.toLong()
+
+    override fun getChildId(group: Int, child: Int): Long = child.toLong()
+
+    override fun hasStableIds(): Boolean = true
+
+    override fun isChildSelectable(group: Int, child: Int): Boolean = true
+
+    private fun doBinding(convertView: View?, parent: ViewGroup?,
+                          obj: Any, highlight: Boolean): View {
+        val finalView: View = if (convertView != null) convertView
+        else {
+            val inflater = parent!!.getContext()
+                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE) as LayoutInflater
+            inflater.inflate(R.layout.list_navigation_drawer, parent, false)
+        }
+
+        val holder: NavItemHolder = if (finalView.getTag() != null) finalView.getTag() as NavItemHolder
+        else NavItemHolder(finalView, R.id.navlist_content)
+
+        holder.bind(obj, highlight)
+        finalView.setTag(holder)
+        return finalView
+    }
+
+    override fun getGroupView(position: Int, expanded: Boolean,
+                              convertView: View?, parent: ViewGroup?): View =
+            doBinding(convertView, parent, getGroup(position), position == groupHighlighted)
+
+    override fun getChildView(group: Int, child: Int, isLast: Boolean,
+                              convertView: View?, parent: ViewGroup?): View =
+            doBinding(convertView, parent, getChild(group, child), child == childHighlighted)
+
+    // Resource should be IdRes
+    class NavItemHolder(val bindTo: View, resource: Int) {
+        val content: TextView = bindTo.findViewById(resource) as TextView
+
+        fun bind(obj: Any, highlighted: Boolean) {
+            content.setText(obj.toString())
+            if (highlighted)
+                content.setTextColor(bindTo.getResources().getColor(R.color.navbar_highlight))
+            else
+                content.setTextColor(bindTo.getResources().getColor(R.color.navbar_unhighlighted))
+        }
+    }
+
+}

app/src/main/kotlin/org/bspeice/minimalbible/activity/viewer/BibleViewClient.kt

@@ -5,10 +5,10 @@ import org.bspeice.minimalbible.service.book.VerseLookupService
 import android.webkit.WebViewClient
 import android.webkit.JavascriptInterface
 import org.crosswire.jsword.book.Book
-import org.crosswire.jsword.versification.getVersification
 import java.util.ArrayList
 import android.util.Log
 import rx.subjects.PublishSubject
+import org.crosswire.jsword.book.getVersification
 
 /**
  * Created by bspeice on 9/14/14.

app/src/main/kotlin/org/bspeice/minimalbible/service/manager/BookManager.kt

@@ -5,30 +5,30 @@ import org.crosswire.jsword.book.Books
 import rx.functions.Action1
 import org.crosswire.jsword.book.Book
 import rx.functions.Action0
+import org.bspeice.minimalbible.exception.NoBooksInstalledException
+import javax.inject.Singleton
 
 /**
  * 'Open' class and values for mockito to subclass
  * http://confluence.jetbrains.com/display/Kotlin/Classes+and+Inheritance
  */
 
-//@Singleton
+Singleton
 open class BookManager() {
     // Some extra books like to think they're installed, but trigger NPE all over the place...
     val ignore = array("ERen_no", "ot1nt2");
 
+
     open val installedBooks = Observable.from(Books.installed()!!.getBooks())
             ?.filter { !ignore.contains(it!!.getInitials()) }
-            ?.cache()
+            ?.cache() ?: throw NoBooksInstalledException()
+
     var refreshComplete = false;
 
     {
         // TODO: Cleaner way of expressing this?
-        installedBooks?.subscribe(Action1<Book> { result -> },
+        installedBooks.subscribe(Action1<Book> { result -> },
                 Action1<Throwable> { error -> },
                 Action0 { refreshComplete = true })
     }
-
-    fun getBooks(): Observable<Book> {
-        return installedBooks as Observable
-    }
 }

app/src/main/kotlin/org/crosswire/jsword/book/BookUtil.kt

@@ -0,0 +1,28 @@
+package org.crosswire.jsword.book
+
+import org.crosswire.jsword.versification.Versification
+import org.crosswire.jsword.versification.system.Versifications
+import android.util.Log
+import org.bspeice.minimalbible.service.manager.InvalidBookException
+import org.crosswire.jsword.versification.getBookNames
+import org.crosswire.jsword.versification.BibleBook
+
+/**
+ * Utility methods for dealing with Books
+ */
+
+fun Book.getVersification(): Versification {
+    val v = Versifications.instance()!!.getVersification(
+            this.getBookMetaData()!!.getProperty(BookMetaData.KEY_VERSIFICATION).toString()
+    )
+    if (v == null) {
+        Log.e(javaClass<Book>().getSimpleName(), "Invalid book: " + this.getInitials())
+        throw InvalidBookException(this.getInitials())
+    } else
+        return v
+}
+
+fun Book.bookNames(): List<String> = this.getVersification().getBookNames()
+
+fun Book.bookName(bBook: BibleBook): String =
+        this.getVersification().getBookName(bBook).getLongName()

app/src/main/kotlin/org/crosswire/jsword/versification/VersificationUtil.kt

@@ -1,45 +1,16 @@
 package org.crosswire.jsword.versification
 
-import org.crosswire.jsword.book.Book
 import java.util.ArrayList
-import org.crosswire.jsword.versification.system.Versifications
-import org.crosswire.jsword.book.BookMetaData
-import rx.Observable
-import android.util.Log
-import org.bspeice.minimalbible.service.manager.InvalidBookException
 
 /**
- * Created by bspeice on 9/10/14.
+ * VersificationUtil class allows Java to easily reach in to Kotlin
  */
-
+object INTRO_BOOKS {
-class VersificationUtil() {
+    val INTROS = array(
-    class object {
+            BibleBook.INTRO_BIBLE,
-        val INTROS = array(
+            BibleBook.INTRO_OT,
-                BibleBook.INTRO_BIBLE,
+            BibleBook.INTRO_NT
-                BibleBook.INTRO_OT,
+    )
-                BibleBook.INTRO_NT
-        )
-    }
-
-    fun getBookNames(b: Book): Observable<String> {
-        return Observable.from(b.getVersification().getBookNames())
-    }
-
-    fun getBooks(b: Book): Observable<BibleBook> {
-        return Observable.from(b.getVersification().getBooks())
-    }
-
-    fun getChapterCount(b: Book, bibleBook: BibleBook): Int {
-        return b.getVersification().getChapterCount(bibleBook)
-    }
-
-    fun getBookName(b: Book, bibleBook: BibleBook): String {
-        return b.getVersification().getLongName(bibleBook)
-    }
-
-    fun getVersification(b: Book): Versification {
-        return b.getVersification()
-    }
 }
 
 // TODO: Refactor (is there a better way to accomplish this?) and move
@@ -52,26 +23,15 @@ fun <T> Iterator<T>.iterable(): Iterable<T> {
     return list
 }
 
-fun Versification.getBooks(): List<BibleBook> {
+fun Versification.getAllBooks(): List<BibleBook> =
-    return this.getBookIterator()!!.iterable()
+        this.getBookIterator()!!.iterable().toList()
-            .filter { !VersificationUtil.INTROS.contains(it) }
-}
 
-fun Versification.getBookNames(): List<String> {
+fun Versification.getBooks(): List<BibleBook> =
-    return this.getBooks().map { this.getLongName(it) }
+        this.getAllBooks().filter { !INTRO_BOOKS.INTROS.contains(it) }
-}
+
+fun Versification.getBookNames(): List<String> =
+        this.getBooks().map { this.getLongName(it) }
 
 fun Versification.getChapterCount(b: BibleBook): Int {
     return this.getLastChapter(b)
-}
-
-fun Book.getVersification(): Versification {
-    val v = Versifications.instance()!!.getVersification(
-            this.getBookMetaData()!!.getProperty(BookMetaData.KEY_VERSIFICATION).toString()
-    )
-    if (v == null) {
-        Log.e(javaClass<Book>().getSimpleName(), "Invalid book: " + this.getInitials())
-        throw InvalidBookException(this.getInitials())
-    } else
-        return v
 }