/*
 * Copyright 2015, The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.example.android.testing.notes.util;

import android.net.Uri;
import android.os.Environment;
import android.support.annotation.VisibleForTesting;

import java.io.File;
import java.io.IOException;

/**
 * A thin wrapper around Android file APIs to make them more testable and allows the injection of a
 * fake implementation for hermetic UI tests.
 */
public class ImageFileImpl implements ImageFile {

    @VisibleForTesting
    File mImageFile;

    @Override
    public void create(String name, String extension) throws IOException {
        File storageDir = Environment.getExternalStoragePublicDirectory(
                Environment.DIRECTORY_PICTURES);

        mImageFile = File.createTempFile(
                name,  /* prefix */
                extension,        /* suffix */
                storageDir      /* directory */
        );
    }

    @Override
    public boolean exists() {
        return null != mImageFile && mImageFile.exists();
    }

    @Override
    public void delete() {
        mImageFile = null;
    }

    @Override
    public String getPath() {
        return Uri.fromFile(mImageFile).toString();
    }

}
