stockMovementViewHolderEditTextWatcher.java

package org.openlmis.core.view.holder;

import android.text.Editable;
import android.view.View;
import android.widget.TextView;

import org.apache.commons.lang3.StringUtils;
import org.openlmis.core.utils.SingleTextWatcher;
import org.openlmis.core.view.viewmodel.StockMovementViewModel;

class StockMovementViewHolderEditTextWatcher extends SingleTextWatcher {
    private StockMovementViewHolder stockMovementViewHolder;
    private final View view;
    private final long currentStockOnHand;
    private final StockMovementViewModel model;

    public StockMovementViewHolderEditTextWatcher(StockMovementViewHolder stockMovementViewHolder, View view, StockMovementViewModel model, long currentStockOnHand) {
        this.stockMovementViewHolder = stockMovementViewHolder;
        this.view = view;
        this.currentStockOnHand = currentStockOnHand;
        this.model = model;
    }

    @Override
    public void afterTextChanged(Editable editable) {
        setValue(view, model, currentStockOnHand);
    }

    private void setValue(View v, StockMovementViewModel model, long currentStockOnHand) {
        String text = ((TextView) v).getText().toString();

        if (v != stockMovementViewHolder.etDocumentNo && v != stockMovementViewHolder.etRequested) {
            updateStockExistence(v, model, currentStockOnHand, text);
        }

        if (v == stockMovementViewHolder.etReceived) {
            model.setReceived(stockMovementViewHolder.etReceived.getText().toString());
        } else if (v == stockMovementViewHolder.etIssued) {
            model.setIssued(stockMovementViewHolder.etIssued.getText().toString());
        } else if (v == stockMovementViewHolder.etPositiveAdjustment) {
            model.setPositiveAdjustment(stockMovementViewHolder.etPositiveAdjustment.getText().toString());
        } else if (v == stockMovementViewHolder.etNegativeAdjustment) {
            model.setNegativeAdjustment(stockMovementViewHolder.etNegativeAdjustment.getText().toString());
        } else if (v == stockMovementViewHolder.etDocumentNo) {
            model.setDocumentNo(stockMovementViewHolder.etDocumentNo.getText().toString());
        } else if (v == stockMovementViewHolder.etRequested) {
            model.setRequested(stockMovementViewHolder.etRequested.getText().toString());
        }
    }

    private void updateStockExistence(View v, StockMovementViewModel model, long currentStockOnHand, String text) {
        long number = 0;
        if (!StringUtils.isEmpty(text)) {
            number = Long.parseLong(text);
        }

        String stockExistence = "";
        if (v == stockMovementViewHolder.etReceived || v == stockMovementViewHolder.etPositiveAdjustment) {
            stockExistence = String.valueOf(currentStockOnHand + number);
        } else if (v == stockMovementViewHolder.etIssued || v == stockMovementViewHolder.etNegativeAdjustment) {
            stockExistence = String.valueOf(currentStockOnHand - number);
        }
        stockMovementViewHolder.txStockExistence.setText(stockExistence);
        model.setStockExistence(stockExistence);
    }
}