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path: root/src/main/java/de/pixart/messenger/services/AvatarService.java
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package de.pixart.messenger.services;

import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.PorterDuff;
import android.graphics.PorterDuffXfermode;
import android.graphics.Rect;
import android.graphics.Typeface;
import android.net.Uri;
import android.util.DisplayMetrics;
import android.util.Log;
import android.util.LruCache;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Locale;
import java.util.Set;

import de.pixart.messenger.Config;
import de.pixart.messenger.entities.Account;
import de.pixart.messenger.entities.Bookmark;
import de.pixart.messenger.entities.Contact;
import de.pixart.messenger.entities.Conversation;
import de.pixart.messenger.entities.ListItem;
import de.pixart.messenger.entities.Message;
import de.pixart.messenger.entities.MucOptions;
import de.pixart.messenger.utils.UIHelper;
import de.pixart.messenger.xmpp.OnAdvancedStreamFeaturesLoaded;
import de.pixart.messenger.xmpp.XmppConnection;
import rocks.xmpp.addr.Jid;

public class AvatarService implements OnAdvancedStreamFeaturesLoaded {

    private static final int FG_COLOR = 0xFFFAFAFA;
    private static final int TRANSPARENT = 0x00000000;
    private static final int PLACEHOLDER_COLOR = 0xFF202020;

    private static final String PREFIX_CONTACT = "contact";
    private static final String PREFIX_CONVERSATION = "conversation";
    private static final String PREFIX_ACCOUNT = "account";
    private static final String PREFIX_GENERIC = "generic";

    final private ArrayList<Integer> sizes = new ArrayList<>();
    final private HashMap<String,Set<String>> conversationDependentKeys = new HashMap<>();

    protected XmppConnectionService mXmppConnectionService = null;

    public AvatarService(XmppConnectionService service) {
        this.mXmppConnectionService = service;
    }

    private Bitmap get(final Contact contact, final int size, boolean cachedOnly) {
        if (contact.isSelf()) {
            return get(contact.getAccount(),size,cachedOnly);
        }
        final String KEY = key(contact, size);
        Bitmap avatar = this.mXmppConnectionService.getBitmapCache().get(KEY);
        if (avatar != null || cachedOnly) {
            return avatar;
        }
        if (avatar == null && contact.getAvatar() != null) {
            avatar = mXmppConnectionService.getFileBackend().getAvatar(contact.getAvatar(), size);
        }
        if (avatar == null && contact.getProfilePhoto() != null) {
            try {
                avatar = mXmppConnectionService.getFileBackend().cropCenterSquare(Uri.parse(contact.getProfilePhoto()), size);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        if (avatar == null) {
            avatar = get(contact.getDisplayName(), contact.getJid().asBareJid().toString(), size, cachedOnly);
        }
        this.mXmppConnectionService.getBitmapCache().put(KEY, avatar);
        return avatar;
    }

    public Bitmap getRoundedShortcut(final Contact contact) {
        DisplayMetrics metrics = mXmppConnectionService.getResources().getDisplayMetrics();
        int size = Math.round(metrics.density * 48);
        Bitmap bitmap = get(contact, size);
        Bitmap output = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Bitmap.Config.ARGB_8888);
        Canvas canvas = new Canvas(output);

        final Paint paint = new Paint();
        final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());

        paint.setAntiAlias(true);
        canvas.drawARGB(0, 0, 0, 0);
        canvas.drawCircle(bitmap.getWidth() / 2, bitmap.getHeight() / 2, bitmap.getWidth() / 2, paint);
        paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
        canvas.drawBitmap(bitmap, rect, rect, paint);
        return output;
    }

    public Bitmap get(final MucOptions.User user, final int size, boolean cachedOnly) {
        Contact c = user.getContact();
        if (c != null && (c.getProfilePhoto() != null || c.getAvatar() != null || user.getAvatar() == null)) {
            return get(c, size, cachedOnly);
        } else {
            return getImpl(user, size, cachedOnly);
        }
    }

    private Bitmap getImpl(final MucOptions.User user, final int size, boolean cachedOnly) {
        final String KEY = key(user, size);
        Bitmap avatar = this.mXmppConnectionService.getBitmapCache().get(KEY);
        if (avatar != null || cachedOnly) {
            return avatar;
        }
        if (user.getAvatar() != null) {
            avatar = mXmppConnectionService.getFileBackend().getAvatar(user.getAvatar(), size);
        }
        if (avatar == null) {
            Contact contact = user.getContact();
            if (contact != null) {
                avatar = get(contact, size, cachedOnly);
            } else {
                String seed = user.getRealJid() != null ? user.getRealJid().asBareJid().toString() : null;
                avatar = get(user.getName(), seed, size, cachedOnly);
            }
        }
        this.mXmppConnectionService.getBitmapCache().put(KEY, avatar);
        return avatar;
    }

    public void clear(Contact contact) {
        synchronized (this.sizes) {
            for (Integer size : sizes) {
                this.mXmppConnectionService.getBitmapCache().remove(
                        key(contact, size));
            }
        }
        for (Conversation conversation : mXmppConnectionService.findAllConferencesWith(contact)) {
            clear(conversation);
        }
    }

    private String key(Contact contact, int size) {
        synchronized (this.sizes) {
            if (!this.sizes.contains(size)) {
                this.sizes.add(size);
            }
        }
        return PREFIX_CONTACT + "_" + contact.getAccount().getJid().asBareJid() + "_"
                + contact.getJid() + "_" + String.valueOf(size);
    }

    private String key(MucOptions.User user, int size) {
        synchronized (this.sizes) {
            if (!this.sizes.contains(size)) {
                this.sizes.add(size);
            }
        }
        return PREFIX_CONTACT + "_" + user.getAccount().getJid().asBareJid() + "_"
                + user.getFullJid() + "_" + String.valueOf(size);
    }

    public Bitmap get(ListItem item, int size) {
        return get(item, size, false);
    }

    public Bitmap get(ListItem item, int size, boolean cachedOnly) {
        if (item instanceof Contact) {
            return get((Contact) item, size, cachedOnly);
        } else if (item instanceof Bookmark) {
            Bookmark bookmark = (Bookmark) item;
            if (bookmark.getConversation() != null) {
                return get(bookmark.getConversation(), size, cachedOnly);
            } else {
                String seed = bookmark.getJid() != null ? bookmark.getJid().asBareJid().toString() : null;
                return get(bookmark.getDisplayName(), seed, size, cachedOnly);
            }
        } else {
            String seed = item.getJid() != null ? item.getJid().asBareJid().toString() : null;
            return get(item.getDisplayName(), seed, size, cachedOnly);
        }
    }

    public Bitmap get(Conversation conversation, int size) {
        return get(conversation, size, false);
    }

    public Bitmap get(Conversation conversation, int size, boolean cachedOnly) {
        if (conversation.getMode() == Conversation.MODE_SINGLE) {
            return get(conversation.getContact(), size, cachedOnly);
        } else {
            return get(conversation.getMucOptions(), size, cachedOnly);
        }
    }

    public void clear(Conversation conversation) {
        if (conversation.getMode() == Conversation.MODE_SINGLE) {
            clear(conversation.getContact());
        } else {
            clear(conversation.getMucOptions());
            synchronized (this.conversationDependentKeys) {
                Set<String> keys = this.conversationDependentKeys.get(conversation.getUuid());
                if (keys == null) {
                    return;
                }
                LruCache<String, Bitmap> cache = this.mXmppConnectionService.getBitmapCache();
                for (String key : keys) {
                    cache.remove(key);
                }
                keys.clear();
            }
        }
    }

    private Bitmap get(MucOptions mucOptions, int size, boolean cachedOnly) {
        final String KEY = key(mucOptions, size);
        Bitmap bitmap = this.mXmppConnectionService.getBitmapCache().get(KEY);
        if (bitmap != null || cachedOnly) {
            return bitmap;
        }
        final List<MucOptions.User> users = mucOptions.getUsersRelevantForNameAndAvatar();
        if (users.size() == 0) {
            Conversation c = mucOptions.getConversation();
            bitmap = getImpl(c.getName().toString(), c.getJid().asBareJid().toString(), size);
        } else {
            bitmap = getImpl(users, size);
        }
        this.mXmppConnectionService.getBitmapCache().put(KEY, bitmap);
        return bitmap;
    }

    private Bitmap get(List<MucOptions.User> users, int size, boolean cachedOnly) {
        final String KEY = key(users, size);
        Bitmap bitmap = this.mXmppConnectionService.getBitmapCache().get(KEY);
        if (bitmap != null || cachedOnly) {
            return bitmap;
        }
        bitmap = getImpl(users, size);
        this.mXmppConnectionService.getBitmapCache().put(KEY, bitmap);
        return bitmap;
    }

    private Bitmap getImpl(List<MucOptions.User> users, int size) {
        int count = users.size();
        Bitmap bitmap = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
        Canvas canvas = new Canvas(bitmap);
        bitmap.eraseColor(TRANSPARENT);
        if (count == 0) {
            throw new AssertionError("Unable to draw tiles for 0 users");
        } else if (count == 1) {
            drawTile(canvas, users.get(0), 0, 0, size / 2 - 1, size);
            drawTile(canvas, users.get(0).getAccount(), size / 2 + 1, 0, size, size);
        } else if (count == 2) {
            drawTile(canvas, users.get(0), 0, 0, size / 2 - 1, size);
            drawTile(canvas, users.get(1), size / 2 + 1, 0, size, size);
        } else if (count == 3) {
            drawTile(canvas, users.get(0), 0, 0, size / 2 - 1, size);
            drawTile(canvas, users.get(1), size / 2 + 1, 0, size, size / 2 - 1);
            drawTile(canvas, users.get(2), size / 2 + 1, size / 2 + 1, size,
                    size);
        } else if (count == 4) {
            drawTile(canvas, users.get(0), 0, 0, size / 2 - 1, size / 2 - 1);
            drawTile(canvas, users.get(1), 0, size / 2 + 1, size / 2 - 1, size);
            drawTile(canvas, users.get(2), size / 2 + 1, 0, size, size / 2 - 1);
            drawTile(canvas, users.get(3), size / 2 + 1, size / 2 + 1, size,
                    size);
        } else {
            drawTile(canvas, users.get(0), 0, 0, size / 2 - 1, size / 2 - 1);
            drawTile(canvas, users.get(1), 0, size / 2 + 1, size / 2 - 1, size);
            drawTile(canvas, users.get(2), size / 2 + 1, 0, size, size / 2 - 1);
            drawTile(canvas, "\u2026", PLACEHOLDER_COLOR, size / 2 + 1, size / 2 + 1,
                    size, size);
        }
        return bitmap;
    }

    public void clear(MucOptions options) {
        synchronized (this.sizes) {
            for (Integer size : sizes) {
                this.mXmppConnectionService.getBitmapCache().remove(key(options, size));
            }
        }
    }

    private String key(MucOptions options, int size) {
        synchronized (this.sizes) {
            if (!this.sizes.contains(size)) {
                this.sizes.add(size);
            }
        }
        return PREFIX_CONVERSATION + "_" + options.getConversation().getUuid()
                + "_" + String.valueOf(size);
    }

    private String key(List<MucOptions.User> users, int size) {
        final Conversation conversation = users.get(0).getConversation();
        StringBuilder builder = new StringBuilder("TILE_");
        builder.append(conversation.getUuid());

        for (MucOptions.User user : users) {
            builder.append("\0");
            builder.append(user.getRealJid() == null ? "" : user.getRealJid().asBareJid().toString());
            builder.append("\0");
            builder.append(user.getFullJid() == null ? "" : user.getFullJid().toString());
        }
        final String key = builder.toString();
        synchronized (this.conversationDependentKeys) {
            Set<String> keys;
            if (this.conversationDependentKeys.containsKey(conversation.getUuid())) {
                keys = this.conversationDependentKeys.get(conversation.getUuid());
            } else {
                keys = new HashSet<>();
                this.conversationDependentKeys.put(conversation.getUuid(), keys);
            }
            keys.add(key);
        }
        return key;
    }

    public Bitmap get(Account account, int size) {
        return get(account, size, false);
    }

    public Bitmap get(Account account, int size, boolean cachedOnly) {
        final String KEY = key(account, size);
        Bitmap avatar = mXmppConnectionService.getBitmapCache().get(KEY);
        if (avatar != null || cachedOnly) {
            return avatar;
        }
        avatar = mXmppConnectionService.getFileBackend().getAvatar(account.getAvatar(), size);
        if (avatar == null) {
            avatar = get(account.getJid().asBareJid().toString(), null, size, false);
        }
        mXmppConnectionService.getBitmapCache().put(KEY, avatar);
        return avatar;
    }

    public Bitmap get(Message message, int size, boolean cachedOnly) {
        final Conversation conversation = message.getConversation();
        if (message.getType() == Message.TYPE_STATUS && message.getCounterparts() != null && message.getCounterparts().size() > 1) {
            return get(message.getCounterparts(), size, cachedOnly);
        } else if (message.getStatus() == Message.STATUS_RECEIVED) {
            Contact c = message.getContact();
            if (c != null && (c.getProfilePhoto() != null || c.getAvatar() != null)) {
                return get(c, size, cachedOnly);
            } else if (message.getConversation().getMode() == Conversation.MODE_MULTI) {
                final Jid trueCounterpart = message.getTrueCounterpart();
                MucOptions.User user;
                if (trueCounterpart != null) {
                    user = conversation.getMucOptions().findUserByRealJid(trueCounterpart);
                } else {
                    user = conversation.getMucOptions().findUserByFullJid(message.getCounterpart());
                }
                if (user != null) {
                    return getImpl(user, size, cachedOnly);
                }
            } else if (c != null) {
                return get(c, size, cachedOnly);
            }
            Jid tcp = message.getTrueCounterpart();
            String seed = tcp != null ? tcp.asBareJid().toString() : null;
            return get(UIHelper.getMessageDisplayName(message), seed, size, cachedOnly);
        } else {
            return get(conversation.getAccount(), size, cachedOnly);
        }
    }

    public void clear(Account account) {
        synchronized (this.sizes) {
            for (Integer size : sizes) {
                this.mXmppConnectionService.getBitmapCache().remove(key(account, size));
            }
        }
    }

    public void clear(MucOptions.User user) {
        synchronized (this.sizes) {
            for (Integer size : sizes) {
                this.mXmppConnectionService.getBitmapCache().remove(key(user, size));
            }
        }
    }

    private String key(Account account, int size) {
        synchronized (this.sizes) {
            if (!this.sizes.contains(size)) {
                this.sizes.add(size);
            }
        }
        return PREFIX_ACCOUNT + "_" + account.getUuid() + "_"
                + String.valueOf(size);
    }

    /*public Bitmap get(String name, int size) {
         return get(name,null, size,false);
 	}*/

    public Bitmap get(final String name, String seed, final int size, boolean cachedOnly) {
        final String KEY = key(seed == null ? name : seed, size);
        Bitmap bitmap = mXmppConnectionService.getBitmapCache().get(KEY);
        if (bitmap != null || cachedOnly) {
            return bitmap;
        }
        bitmap = getImpl(name, seed, size);
        mXmppConnectionService.getBitmapCache().put(KEY, bitmap);
        return bitmap;
    }

    private Bitmap getImpl(final String name, final String seed, final int size) {
        Bitmap bitmap = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
        Canvas canvas = new Canvas(bitmap);
        final String trimmedName = name == null ? "" : name.trim();
        drawTile(canvas, trimmedName, seed, 0, 0, size, size);
        return bitmap;
    }

    private String key(String name, int size) {
        synchronized (this.sizes) {
            if (!this.sizes.contains(size)) {
                this.sizes.add(size);
            }
        }
        return PREFIX_GENERIC + "_" + name + "_" + String.valueOf(size);
    }

    private boolean drawTile(Canvas canvas, String letter, int tileColor, int left, int top, int right, int bottom) {
        letter = letter.toUpperCase(Locale.getDefault());
        Paint tilePaint = new Paint(), textPaint = new Paint();
        tilePaint.setColor(tileColor);
        textPaint.setFlags(Paint.ANTI_ALIAS_FLAG);
        textPaint.setColor(FG_COLOR);
        textPaint.setTypeface(Typeface.create("sans-serif-light",
                Typeface.NORMAL));
        textPaint.setTextSize((float) ((right - left) * 0.8));
        Rect rect = new Rect();

        canvas.drawRect(new Rect(left, top, right, bottom), tilePaint);
        textPaint.getTextBounds(letter, 0, 1, rect);
        float width = textPaint.measureText(letter);
        canvas.drawText(letter, (right + left) / 2 - width / 2, (top + bottom)
                / 2 + rect.height() / 2, textPaint);
        return true;
    }

    private boolean drawTile(Canvas canvas, MucOptions.User user, int left,
                             int top, int right, int bottom) {
        Contact contact = user.getContact();
        if (contact != null) {
            Uri uri = null;
            if (contact.getAvatar() != null) {
                uri = mXmppConnectionService.getFileBackend().getAvatarUri(
                        contact.getAvatar());
            } else if (contact.getProfilePhoto() != null) {
                uri = Uri.parse(contact.getProfilePhoto());
            }
            if (drawTile(canvas, uri, left, top, right, bottom)) {
                return true;
            }
        } else if (user.getAvatar() != null) {
            Uri uri = mXmppConnectionService.getFileBackend().getAvatarUri(user.getAvatar());
            if (drawTile(canvas, uri, left, top, right, bottom)) {
                return true;
            }
        } else if (user.getAvatar() != null) {
            Uri uri = mXmppConnectionService.getFileBackend().getAvatarUri(user.getAvatar());
            if (drawTile(canvas, uri, left, top, right, bottom)) {
                return true;
            }
        } else if (user.getAvatar() != null) {
            Uri uri = mXmppConnectionService.getFileBackend().getAvatarUri(user.getAvatar());
            if (drawTile(canvas, uri, left, top, right, bottom)) {
                return true;
            }
        }
        if (contact != null) {
            String seed = contact.getJid().asBareJid().toString();
            drawTile(canvas, contact.getDisplayName(), seed, left, top, right, bottom);
        } else {
            String seed = user.getRealJid() == null ? null : user.getRealJid().asBareJid().toString();
            drawTile(canvas, user.getName(), seed, left, top, right, bottom);
        }
        return true;
    }

    private boolean drawTile(Canvas canvas, Account account, int left, int top, int right, int bottom) {
        String avatar = account.getAvatar();
        if (avatar != null) {
            Uri uri = mXmppConnectionService.getFileBackend().getAvatarUri(avatar);
            if (uri != null) {
                if (drawTile(canvas, uri, left, top, right, bottom)) {
                    return true;
                }
            }
        }
        String name = account.getJid().asBareJid().toString();
        return drawTile(canvas, name, name, left, top, right, bottom);
    }

    private boolean drawTile(Canvas canvas, String name, String seed, int left, int top, int right, int bottom) {
        if (name != null) {
            final String letter = getFirstLetter(name);
            final int color = UIHelper.getColorForName(seed == null ? name : seed);
            drawTile(canvas, letter, color, left, top, right, bottom);
            return true;
        }
        return false;
    }

    private static String getFirstLetter(String name) {
        for (Character c : name.toCharArray()) {
            if (Character.isLetterOrDigit(c)) {
                return c.toString();
            }
        }
        return "X";
    }

    private boolean drawTile(Canvas canvas, Uri uri, int left, int top, int right, int bottom) {
        if (uri != null) {
            Bitmap bitmap = mXmppConnectionService.getFileBackend()
                    .cropCenter(uri, bottom - top, right - left);
            if (bitmap != null) {
                drawTile(canvas, bitmap, left, top, right, bottom);
                return true;
            }
        }
        return false;
    }

    private boolean drawTile(Canvas canvas, Bitmap bm, int dstleft, int dsttop, int dstright, int dstbottom) {
        Rect dst = new Rect(dstleft, dsttop, dstright, dstbottom);
        canvas.drawBitmap(bm, null, dst, null);
        return true;
    }

    @Override
    public void onAdvancedStreamFeaturesAvailable(Account account) {
        XmppConnection.Features features = account.getXmppConnection().getFeatures();
        if (features.pep() && !features.pepPersistent()) {
            Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": has pep but is not persistent");
            if (account.getAvatar() != null) {
                mXmppConnectionService.republishAvatarIfNeeded(account);
            }
        }
    }
}