Audinaut-subsonic-app-android/app/src/main/java/net/nullsum/audinaut/view/CacheLocationPreference.java

/*
  This file is part of Subsonic.
    Subsonic is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
    Subsonic is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    GNU General Public License for more details.
    You should have received a copy of the GNU General Public License
    along with Subsonic. If not, see <http://www.gnu.org/licenses/>.
    Copyright 2015 (C) Scott Jackson
*/
package net.nullsum.audinaut.view;

import android.content.Context;
import android.os.Build;
import android.os.Environment;
import android.preference.DialogPreference;
import android.preference.EditTextPreference;
import android.support.v4.content.ContextCompat;
import android.util.AttributeSet;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.TextView;

import java.io.File;

import net.nullsum.audinaut.R;
import net.nullsum.audinaut.util.FileUtil;

public class CacheLocationPreference extends EditTextPreference {
    private static final String TAG = CacheLocationPreference.class.getSimpleName();
    private Context context;

    public CacheLocationPreference(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        this.context = context;
    }
    public CacheLocationPreference(Context context, AttributeSet attrs) {
        super(context, attrs);
        this.context = context;
    }
    public CacheLocationPreference(Context context) {
        super(context);
        this.context = context;
    }

    @Override
    protected void onBindDialogView(View view) {
        super.onBindDialogView(view);

        view.setLayoutParams(new ViewGroup.LayoutParams(android.view.ViewGroup.LayoutParams.WRAP_CONTENT, android.view.ViewGroup.LayoutParams.WRAP_CONTENT));

        final EditText editText = (EditText) view.findViewById(android.R.id.edit);
        ViewGroup vg = (ViewGroup) editText.getParent();

        LinearLayout cacheButtonsWrapper = (LinearLayout) LayoutInflater.from(context).inflate(R.layout.cache_location_buttons, vg, true);
        Button internalLocation = (Button) cacheButtonsWrapper.findViewById(R.id.location_internal);
        Button externalLocation = (Button) cacheButtonsWrapper.findViewById(R.id.location_external);

        File[] dirs;
        if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            dirs = context.getExternalMediaDirs();
        } else {
            dirs = ContextCompat.getExternalFilesDirs(context, null);
        }

        // Past 5.0 we can query directly for SD Card
        File internalDir = null, externalDir = null;
        if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            for(int i = 0; i < dirs.length; i++) {
                try {
                    if (dirs[i] != null) {
                        if(Environment.isExternalStorageRemovable(dirs[i])) {
                            if(externalDir != null) {
                                externalDir = dirs[i];
                            }
                        } else {
                            internalDir = dirs[i];
                        }

                        if(internalDir != null && externalDir != null) {
                            break;
                        }
                    }
                } catch (Exception e) {
                    Log.e(TAG, "Failed to check if is external", e);
                }
            }
        }

        // Before 5.0, we have to guess.  Most of the time the SD card is last
        if(externalDir == null) {
            for (int i = dirs.length - 1; i >= 0; i--) {
                if (dirs[i] != null) {
                    externalDir = dirs[i];
                    break;
                }
            }
        }
        if(internalDir == null) {
            for (int i = 0; i < dirs.length; i++) {
                if (dirs[i] != null) {
                    internalDir = dirs[i];
                    break;
                }
            }
        }
        final File finalInternalDir = new File(internalDir, "music");
        final File finalExternalDir = new File(externalDir, "music");

        if(finalInternalDir != null && (finalInternalDir.exists() || finalInternalDir.mkdirs())) {
            internalLocation.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    String path = finalInternalDir.getPath();
                    editText.setText(path);
                }
            });
        } else {
            internalLocation.setEnabled(false);
        }

        if(finalExternalDir != null && !finalInternalDir.equals(finalExternalDir) && (finalExternalDir.exists() || finalExternalDir.mkdirs())) {
            externalLocation.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    String path = finalExternalDir.getPath();
                    editText.setText(path);
                }
            });
        } else {
            externalLocation.setEnabled(false);
        }
    }
}