Tusky-App-Android/app/src/main/java/com/keylesspalace/tusky/adapter/SavedTootAdapter.java

/* Copyright 2017 Andrew Dawson
 *
 * This file is a part of Tusky.
 *
 * This program 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.
 *
 * Tusky 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 Tusky; if not,
 * see <http://www.gnu.org/licenses>. */

package com.keylesspalace.tusky.adapter;

import android.support.annotation.Nullable;
import android.support.v7.widget.RecyclerView;
import android.text.TextUtils;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageButton;
import android.widget.TextView;

import com.keylesspalace.tusky.R;
import com.keylesspalace.tusky.db.TootEntity;

import java.util.ArrayList;
import java.util.List;

public class SavedTootAdapter extends RecyclerView.Adapter {
    private List<TootEntity> list;

    public SavedTootAdapter() {
        super();
        list = new ArrayList<>();
    }

    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext())
                .inflate(R.layout.item_saved_toot, parent, false);
        return new TootViewHolder(view);
    }

    @Override
    public void onBindViewHolder(RecyclerView.ViewHolder viewHolder, int position) {
        TootViewHolder holder = (TootViewHolder) viewHolder;
        holder.bind(getItem(position));
    }

    @Override
    public int getItemCount() {
        return list.size() + 1;
    }

    public void update(List<TootEntity> newToot) {
        if (newToot == null || newToot.isEmpty()) {
            return;
        }
        if (list.isEmpty()) {
            list = newToot;
        } else {
            int index = list.indexOf(newToot.get(newToot.size() - 1));
            for (int i = 0; i < index; i++) {
                list.remove(0);
            }
            int newIndex = newToot.indexOf(list.get(0));
            if (newIndex == -1) {
                list.addAll(0, newToot);
            } else {
                list.addAll(0, newToot.subList(0, newIndex));
            }
        }
        notifyDataSetChanged();
    }

    public void addItems(List<TootEntity> newToot) {
        int end = list.size();
        list.addAll(newToot);
        notifyItemRangeInserted(end, newToot.size());
    }

    @Nullable
    public TootEntity removeItem(int position) {
        if (position < 0 || position >= list.size()) {
            return null;
        }
        TootEntity toot = list.remove(position);
        notifyItemRemoved(position);
        return toot;
    }

    public void addItem(TootEntity toot, int position) {
        if (position < 0 || position > list.size()) {
            return;
        }
        list.add(position, toot);
        notifyItemInserted(position);
    }

    public TootEntity getItem(int position) {
        if (position >= 0 && position < list.size()) {
            return list.get(position);
        }
        return null;
    }

    public static class ViewHolder extends RecyclerView.ViewHolder {
        TextView mTextView;

        public ViewHolder(TextView v) {
            super(v);
            mTextView = v;
        }
    }

    private static class TootViewHolder extends RecyclerView.ViewHolder {
        public TextView content;
        public ImageButton suppr;

        TootViewHolder(View view) {
            super(view);
            content = (TextView) view.findViewById(R.id.content);
            suppr = (ImageButton) view.findViewById(R.id.suppr);
        }

        public void bind(TootEntity item) {
            if (item != null && !TextUtils.isEmpty(item.getText()))
                content.setText(item.getText());
            else
                content.setText("");
        }
    }
}