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/*
 * Copyright 2015 Austin Keener, Michael Ritter, Florian Spieß, and the JDA contributors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package net.dv8tion.jda.internal.interactions.command;

import gnu.trove.map.TLongObjectMap;
import gnu.trove.map.hash.TLongObjectHashMap;
import net.dv8tion.jda.api.entities.ISnowflake;
import net.dv8tion.jda.api.entities.Message;
import net.dv8tion.jda.api.entities.channel.ChannelType;
import net.dv8tion.jda.api.entities.channel.unions.MessageChannelUnion;
import net.dv8tion.jda.api.interactions.commands.Command;
import net.dv8tion.jda.api.interactions.commands.CommandInteractionPayload;
import net.dv8tion.jda.api.interactions.commands.OptionMapping;
import net.dv8tion.jda.api.interactions.commands.OptionType;
import net.dv8tion.jda.api.utils.data.DataArray;
import net.dv8tion.jda.api.utils.data.DataObject;
import net.dv8tion.jda.internal.JDAImpl;
import net.dv8tion.jda.internal.entities.EntityBuilder;
import net.dv8tion.jda.internal.entities.GuildImpl;
import net.dv8tion.jda.internal.entities.MemberImpl;
import net.dv8tion.jda.internal.entities.UserImpl;
import net.dv8tion.jda.internal.interactions.InteractionImpl;

import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import java.util.ArrayList;
import java.util.List;
import java.util.Objects;

public class CommandInteractionPayloadImpl extends InteractionImpl implements CommandInteractionPayload
{
    private final long commandId;
    private final List options = new ArrayList<>();
    private final TLongObjectMap resolved = new TLongObjectHashMap<>();
    private final String name;
    private final boolean isGuildCommand;
    private String subcommand;
    private String group;
    private final Command.Type type;

    public CommandInteractionPayloadImpl(JDAImpl jda, DataObject data)
    {
        super(jda, data);
        DataObject commandData = data.getObject("data");
        this.commandId = commandData.getUnsignedLong("id");
        this.name = commandData.getString("name");
        this.type = Command.Type.fromId(commandData.getInt("type", 1));
        this.isGuildCommand = !commandData.isNull("guild_id"); // guild_id is always either null or the owner guild (same as interaction guild_id)

        DataArray options = commandData.optArray("options").orElseGet(DataArray::empty);
        DataObject resolveJson = commandData.optObject("resolved").orElseGet(DataObject::empty);

        if (options.length() == 1)
        {
            DataObject option = options.getObject(0);
            switch (OptionType.fromKey(option.getInt("type")))
            {
            case SUB_COMMAND_GROUP:
                group = option.getString("name");
                options = option.getArray("options");
                option = options.getObject(0);
            case SUB_COMMAND:
                subcommand = option.getString("name");
                options = option.optArray("options").orElseGet(DataArray::empty); // Flatten options
                break;
            }
        }

        parseResolved(jda, resolveJson);
        parseOptions(options);
    }

    private void parseOptions(DataArray options)
    {
        options.stream(DataArray::getObject)
                .map(json -> new OptionMapping(json, resolved, getJDA(), getGuild()))
                .forEach(this.options::add);
    }

    private void parseResolved(JDAImpl jda, DataObject resolveJson)
    {
        EntityBuilder entityBuilder = jda.getEntityBuilder();

        resolveJson.optObject("users").ifPresent(users ->
            users.keys().forEach(userId -> {
                DataObject userJson = users.getObject(userId);
                UserImpl userArg = entityBuilder.createUser(userJson);
                resolved.put(userArg.getIdLong(), userArg);
            })
        );

        resolveJson.optObject("attachments").ifPresent(attachments ->
            attachments.keys().forEach(id -> {
                DataObject json = attachments.getObject(id);
                Message.Attachment file = entityBuilder.createMessageAttachment(json);
                resolved.put(file.getIdLong(), file);
            })
        );

        if (this.guild != null)
        {
            GuildImpl guild = (GuildImpl) this.guild;
            resolveJson.optObject("members").ifPresent(members ->
            {
                DataObject users = resolveJson.getObject("users");
                members.keys().forEach(memberId ->
                {
                    DataObject memberJson = members.getObject(memberId);
                    memberJson.put("user", users.getObject(memberId)); // Add user json as well for parsing
                    MemberImpl optionMember = entityBuilder.createMember(guild, memberJson);
                    entityBuilder.updateMemberCache(optionMember);
                    resolved.put(optionMember.getIdLong(), optionMember); // This basically upgrades user to member
                });
            });
            resolveJson.optObject("roles").ifPresent(roles ->
                roles.keys()
                    .stream()
                    .map(this.guild::getRoleById)
                    .filter(Objects::nonNull)
                    .forEach(role -> resolved.put(role.getIdLong(), role))
            );
            resolveJson.optObject("channels").ifPresent(channels ->
                channels.keys().forEach(id -> {
                    ISnowflake channelObj = jda.getGuildChannelById(id);
                    DataObject channelJson = channels.getObject(id);
                    if (channelObj != null)
                        resolved.put(channelObj.getIdLong(), channelObj);
                    else if (ChannelType.fromId(channelJson.getInt("type")).isThread())
                        resolved.put(Long.parseUnsignedLong(id), api.getEntityBuilder().createThreadChannel(guild, channelJson, guild.getIdLong(), false));
                })
            );
        }
    }

    @Nullable
    @Override
    public MessageChannelUnion getChannel()
    {
        return (MessageChannelUnion) super.getChannel();
    }

    @Nonnull
    @Override
    public Command.Type getCommandType()
    {
        return type;
    }

    @Nonnull
    @Override
    public String getName()
    {
        return name;
    }

    @Override
    public String getSubcommandName()
    {
        return subcommand;
    }

    @Override
    public String getSubcommandGroup()
    {
        return group;
    }

    @Override
    public long getCommandIdLong()
    {
        return commandId;
    }

    @Override
    public boolean isGuildCommand()
    {
        return isGuildCommand;
    }

    @Nonnull
    @Override
    public List getOptions()
    {
        return options;
    }
}
 















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