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package org.citra.citra_emu.features.cheats.model;
import androidx.lifecycle.LiveData;
import androidx.lifecycle.MutableLiveData;
import androidx.lifecycle.ViewModel;
public class CheatsViewModel extends ViewModel {
private int mSelectedCheatPosition = -1;
private final MutableLiveData<Cheat> mSelectedCheat = new MutableLiveData<>(null);
private final MutableLiveData<Boolean> mIsAdding = new MutableLiveData<>(false);
private final MutableLiveData<Boolean> mIsEditing = new MutableLiveData<>(false);
private final MutableLiveData<Integer> mCheatAddedEvent = new MutableLiveData<>(null);
private final MutableLiveData<Integer> mCheatChangedEvent = new MutableLiveData<>(null);
private final MutableLiveData<Integer> mCheatDeletedEvent = new MutableLiveData<>(null);
private final MutableLiveData<Boolean> mOpenDetailsViewEvent = new MutableLiveData<>(false);
private Cheat[] mCheats;
private boolean mCheatsNeedSaving = false;
public void load() {
mCheats = CheatEngine.getCheats();
for (int i = 0; i < mCheats.length; i++) {
int position = i;
mCheats[i].setEnabledChangedCallback(() -> {
mCheatsNeedSaving = true;
notifyCheatUpdated(position);
});
}
}
public void saveIfNeeded() {
if (mCheatsNeedSaving) {
CheatEngine.saveCheatFile();
mCheatsNeedSaving = false;
}
}
public Cheat[] getCheats() {
return mCheats;
}
public LiveData<Cheat> getSelectedCheat() {
return mSelectedCheat;
}
public void setSelectedCheat(Cheat cheat, int position) {
if (mIsEditing.getValue()) {
setIsEditing(false);
}
mSelectedCheat.setValue(cheat);
mSelectedCheatPosition = position;
}
public LiveData<Boolean> getIsAdding() {
return mIsAdding;
}
public LiveData<Boolean> getIsEditing() {
return mIsEditing;
}
public void setIsEditing(boolean isEditing) {
mIsEditing.setValue(isEditing);
if (mIsAdding.getValue() && !isEditing) {
mIsAdding.setValue(false);
setSelectedCheat(null, -1);
}
}
/**
* When a cheat is added, the integer stored in the returned LiveData
* changes to the position of that cheat, then changes back to null.
*/
public LiveData<Integer> getCheatAddedEvent() {
return mCheatAddedEvent;
}
private void notifyCheatAdded(int position) {
mCheatAddedEvent.setValue(position);
mCheatAddedEvent.setValue(null);
}
public void startAddingCheat() {
mSelectedCheat.setValue(null);
mSelectedCheatPosition = -1;
mIsAdding.setValue(true);
mIsEditing.setValue(true);
}
public void finishAddingCheat(Cheat cheat) {
if (!mIsAdding.getValue()) {
throw new IllegalStateException();
}
mIsAdding.setValue(false);
mIsEditing.setValue(false);
int position = mCheats.length;
CheatEngine.addCheat(cheat);
mCheatsNeedSaving = true;
load();
notifyCheatAdded(position);
setSelectedCheat(mCheats[position], position);
}
/**
* When a cheat is edited, the integer stored in the returned LiveData
* changes to the position of that cheat, then changes back to null.
*/
public LiveData<Integer> getCheatUpdatedEvent() {
return mCheatChangedEvent;
}
/**
* Notifies that an edit has been made to the contents of the cheat at the given position.
*/
private void notifyCheatUpdated(int position) {
mCheatChangedEvent.setValue(position);
mCheatChangedEvent.setValue(null);
}
public void updateSelectedCheat(Cheat newCheat) {
CheatEngine.updateCheat(mSelectedCheatPosition, newCheat);
mCheatsNeedSaving = true;
load();
notifyCheatUpdated(mSelectedCheatPosition);
setSelectedCheat(mCheats[mSelectedCheatPosition], mSelectedCheatPosition);
}
/**
* When a cheat is deleted, the integer stored in the returned LiveData
* changes to the position of that cheat, then changes back to null.
*/
public LiveData<Integer> getCheatDeletedEvent() {
return mCheatDeletedEvent;
}
/**
* Notifies that the cheat at the given position has been deleted.
*/
private void notifyCheatDeleted(int position) {
mCheatDeletedEvent.setValue(position);
mCheatDeletedEvent.setValue(null);
}
public void deleteSelectedCheat() {
int position = mSelectedCheatPosition;
setSelectedCheat(null, -1);
CheatEngine.removeCheat(position);
mCheatsNeedSaving = true;
load();
notifyCheatDeleted(position);
}
public LiveData<Boolean> getOpenDetailsViewEvent() {
return mOpenDetailsViewEvent;
}
public void openDetailsView() {
mOpenDetailsViewEvent.setValue(true);
mOpenDetailsViewEvent.setValue(false);
}
}
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