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/**
* Copyright (c) 2009-2016, netbout.com
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are PROHIBITED without prior written permission from
* the author. This product may NOT be used anywhere and on any computer
* except the server platform of netbout Inc. located at www.netbout.com.
* Federal copyright law prohibits unauthorized reproduction by any means
* and imposes fines up to $25,000 for violation. If you received
* this code accidentally and without intent to use it, please report this
* incident to the author by email.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
package com.netbout.dynamo;
import com.amazonaws.services.dynamodbv2.model.AttributeValue;
import com.google.common.base.Function;
import com.google.common.collect.Iterables;
import com.jcabi.aspects.Immutable;
import com.jcabi.aspects.Loggable;
import com.jcabi.aspects.Tv;
import com.jcabi.dynamo.Attributes;
import com.jcabi.dynamo.Conditions;
import com.jcabi.dynamo.Item;
import com.jcabi.dynamo.QueryValve;
import com.jcabi.dynamo.Region;
import com.jcabi.log.Logger;
import com.netbout.spi.Friend;
import com.netbout.spi.Friends;
import java.io.IOException;
import java.util.Iterator;
import lombok.EqualsAndHashCode;
import lombok.ToString;
import org.apache.commons.lang3.StringUtils;
/**
* Dynamo friends.
*
* @author Yegor Bugayenko ([email protected])
* @version $Id: 455860e2dfdbddfb8b8748c11662b8de0365f3a6 $
* @since 2.0
*/
@Immutable
@Loggable(Loggable.DEBUG)
@ToString(of = "item")
@EqualsAndHashCode(of = { "region", "item" })
final class DyFriends implements Friends {
/**
* Table name.
*/
public static final String TBL = "friends";
/**
* Index name.
*/
public static final String INDEX = "inbox";
/**
* Bout attribute.
*/
public static final String HASH = "bout";
/**
* Alias attribute.
*/
public static final String RANGE = "alias";
/**
* Title of the bout.
*/
public static final String ATTR_TITLE = "title";
/**
* Subscription of the bout.
*/
public static final String ATTR_SUBSCRIPTION = "subscription";
/**
* Updated attribute.
*/
public static final String ATTR_UPDATED = "updated";
/**
* How many messages unread here.
*/
public static final String ATTR_UNREAD = "unread";
/**
* Names of attachments that are not seen yet.
*/
public static final String ATTR_UNSEEN = "unseen";
/**
* Region to work with.
*/
private final transient Region region;
/**
* Item in "friends" table.
*/
private final transient Item item;
/**
* Ctor.
* @param reg Region
* @param itm Item in "friends" table
*/
DyFriends(final Region reg, final Item itm) {
this.region = reg;
this.item = itm;
}
@Override
public void invite(final String friend) throws IOException {
final String alias = DyFriends.clean(friend);
if (!new Everybody(this.region).occupied(alias)) {
throw new Friends.UnknownAliasException(
String.format("alias '%s' doesn't exist", friend)
);
}
this.region.table(DyFriends.TBL).put(
new Attributes()
.with(DyFriends.HASH, this.bout())
.with(DyFriends.RANGE, alias)
.with(DyFriends.ATTR_TITLE, this.item.get(DyFriends.ATTR_TITLE))
.with(DyFriends.ATTR_SUBSCRIPTION, true)
.with(DyFriends.ATTR_UPDATED, System.currentTimeMillis())
);
Logger.info(this, "@%s invited to #%s", friend, this.bout().getN());
}
@Override
public void kick(final String friend) throws IOException {
final String alias = DyFriends.clean(friend);
final Iterator items = this.region.table(DyFriends.TBL).frame()
.through(new QueryValve())
.where(DyFriends.HASH, Conditions.equalTo(this.bout()))
.where(DyFriends.RANGE, alias)
.iterator();
if (!items.hasNext()) {
throw new Friends.UnknownAliasException(
String.format("alias '%s' is not in the bout", friend)
);
}
items.next();
items.remove();
Logger.info(this, "@%s kicked off #%s", friend, this.bout().getN());
}
@Override
public Iterable iterate() throws IOException {
return Iterables.transform(
this.region.table(DyFriends.TBL)
.frame()
.through(new QueryValve())
.where(DyFriends.HASH, Conditions.equalTo(this.bout())),
new Function() {
@Override
public Friend apply(final Item input) {
try {
return new DyFriend(
DyFriends.this.region,
input.get(DyFriends.RANGE).getS()
);
} catch (final IOException ex) {
throw new IllegalStateException(ex);
}
}
}
);
}
/**
* The bout we're in.
* @return Bout number
* @throws IOException If fails
*/
private AttributeValue bout() throws IOException {
return this.item.get(DyFriends.HASH);
}
/**
* Clean alias.
* @param friend Friend name
* @return Alias
*/
private static String clean(final String friend) {
final String alias = StringUtils.strip(friend, " @\n\t\r");
if (alias.isEmpty()) {
throw new IllegalArgumentException("alias can't be empty");
}
if (alias.length() > Tv.HUNDRED) {
throw new IllegalArgumentException("alias is too long");
}
return alias;
}
}
