Mercury-IM/app/src/main/java/org/mercury_im/messenger/android/ui/account/AccountDetailsFragment.java

package org.mercury_im.messenger.android.ui.account;

import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.Switch;
import android.widget.TextView;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;
import androidx.lifecycle.ViewModelProvider;
import androidx.recyclerview.widget.RecyclerView;

import com.google.android.material.card.MaterialCardView;

import org.mercury_im.messenger.R;
import org.mercury_im.messenger.android.MercuryImApplication;
import org.mercury_im.messenger.android.util.OpenPgpV4FingerprintFormatter;
import org.mercury_im.messenger.core.viewmodel.accounts.AccountFingerprintViewItem;
import org.pgpainless.key.OpenPgpV4Fingerprint;

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.List;
import java.util.UUID;

import butterknife.BindView;
import butterknife.ButterKnife;
import de.hdodenhof.circleimageview.CircleImageView;

public class AccountDetailsFragment extends Fragment {

    @BindView(R.id.avatar)
    CircleImageView avatar;

    @BindView(R.id.jid)
    TextView jid;

    @BindView(R.id.btn_share)
    Button localFingerprintShareButton;

    @BindView(R.id.local_fingerprint)
    TextView localFingerprint;

    @BindView(R.id.fingerprint_list)
    RecyclerView externalFingerprintRecyclerView;

    @BindView(R.id.other_fingerprints_card)
    MaterialCardView otherFingerprintsLayout;

    private final UUID accountId;
    private ToggleableFingerprintsAdapter adapter;

    private AndroidAccountDetailsViewModel viewModel;

    private static final DateFormat dateFormat = SimpleDateFormat.getDateInstance();


    public AccountDetailsFragment(UUID accountId) {
        this.accountId = accountId;
    }

    @Override
    public void onAttach(@NonNull Context context) {
        super.onAttach(context);
        AndroidAccountDetailsViewModel.AndroidAccountDetailsViewModelFactory factory =
                new AndroidAccountDetailsViewModel.AndroidAccountDetailsViewModelFactory(MercuryImApplication.getApplication(), accountId);
        viewModel = new ViewModelProvider(this, factory)
                .get(AndroidAccountDetailsViewModel.class);

        this.adapter = new ToggleableFingerprintsAdapter(viewModel);
    }

    private void observe() {
        viewModel.getLocalFingerprint().observe(getViewLifecycleOwner(),
                f -> localFingerprint.setText(OpenPgpV4FingerprintFormatter.formatOpenPgpV4Fingerprint(f)));

        viewModel.getRemoteFingerprints().observe(getViewLifecycleOwner(), items -> {
            otherFingerprintsLayout.setVisibility(items.isEmpty() ? View.GONE : View.VISIBLE);
            adapter.setItems(items);
        });

        viewModel.getJid().observe(getViewLifecycleOwner(), accountJid -> jid.setText(accountJid.toString()));

        localFingerprintShareButton.setOnClickListener(v -> {
            OpenPgpV4Fingerprint fingerprint = viewModel.getLocalFingerprint().getValue();
            Intent sendIntent = new Intent();
            sendIntent.setAction(Intent.ACTION_SEND);
            sendIntent.putExtra(Intent.EXTRA_TEXT, "openpgp4fpr:" + fingerprint);
            sendIntent.setType("text/plain");

            Intent shareIntent = Intent.createChooser(sendIntent, "Share OpenPGP Fingerprint");
            startActivity(shareIntent);

        });
    }

    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_account_details, container, false);
        ButterKnife.bind(this, view);

        externalFingerprintRecyclerView.setAdapter(adapter);

        observe();

        return view;
    }

    public static class ToggleableFingerprintsAdapter extends RecyclerView.Adapter<ToggleableFingerprintsAdapter.ViewHolder> {

        private final List<AccountFingerprintViewItem> fingerprints = new ArrayList<>();
        private final AndroidAccountDetailsViewModel viewModel;

        public ToggleableFingerprintsAdapter(AndroidAccountDetailsViewModel viewModel) {
            this.viewModel = viewModel;
        }

        public void setItems(List<AccountFingerprintViewItem> fingerprints) {
            synchronized (this.fingerprints) {
                this.fingerprints.clear();
                this.fingerprints.addAll(fingerprints);
                this.notifyDataSetChanged();
            }
        }

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

        @Override
        public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
            synchronized (fingerprints) {
                AccountFingerprintViewItem f = fingerprints.get(position);

                final OpenPgpV4Fingerprint fingerprint = f.getFingerprint();

                holder.fingerprint.setText(OpenPgpV4FingerprintFormatter.formatOpenPgpV4Fingerprint(fingerprint));
                holder.fingerprintTimestamp.setText(dateFormat.format(f.getAnnouncementDate()));

                holder.trustSwitch.setChecked(f.isTrusted());
                holder.trustSwitch.setOnCheckedChangeListener(
                        (buttonView, isChecked) -> viewModel.markFingerprintTrusted(fingerprint, isChecked));
                holder.divider.setVisibility(position == fingerprints.size() - 1 ? View.GONE : View.VISIBLE);
            }
        }

        @Override
        public int getItemCount() {
            return fingerprints.size();
        }

        public static class ViewHolder extends RecyclerView.ViewHolder {

            private final Switch trustSwitch;
            private final TextView fingerprintTimestamp;
            private final TextView fingerprint;
            private final View divider;

            public ViewHolder(@NonNull View itemView) {
                super(itemView);
                this.fingerprint = itemView.findViewById(R.id.fingerprint);
                this.trustSwitch = itemView.findViewById(R.id.fingerprint_toggle);
                this.fingerprintTimestamp = itemView.findViewById(R.id.fingerprint_timestamp);
                this.divider = itemView.findViewById(R.id.divider);
            }
        }
    }

}