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MessageChannel.java
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MessageChannel.java
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/*
* Copyright 2015-2017 Austin Keener & Michael Ritter
*
* 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.core.entities;
import com.mashape.unirest.http.Unirest;
import com.mashape.unirest.request.body.MultipartBody;
import net.dv8tion.jda.core.AccountType;
import net.dv8tion.jda.core.JDA;
import net.dv8tion.jda.core.MessageBuilder;
import net.dv8tion.jda.core.entities.impl.MessageImpl;
import net.dv8tion.jda.core.exceptions.AccountTypeException;
import net.dv8tion.jda.core.requests.*;
import net.dv8tion.jda.core.utils.IOUtil;
import net.dv8tion.jda.core.utils.MiscUtil;
import org.apache.http.util.Args;
import org.json.JSONArray;
import org.json.JSONObject;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.*;
/**
* Represents a Discord channel that can have {@link net.dv8tion.jda.core.entities.Message Messages} and files sent to it.
*/
public interface MessageChannel extends ISnowflake, Formattable
{
/**
* The id for the most recent message sent
* in this current MessageChannel.
* <br>This should only be used if {@link #hasLatestMessage()} returns {@code true}!
*
* <p>This value is updated on each {@link net.dv8tion.jda.core.events.message.MessageReceivedEvent MessageReceivedEvent}
* and <u><b>will be reset to {@code null} if the message associated with this ID gets deleted</b></u>
*
* @throws java.lang.IllegalStateException
* If no message id is available
*
* @return The most recent message's id
*/
String getLatestMessageId();
/**
* Whether this MessageChannel contains a tracked most recent
* message or not.
*
* <p>This does not directly mean that {@link #getHistory()} will be unable to retrieve past messages,
* it merely means that the latest message is untracked by our internal cache meaning that
* if this returns {@code false} the {@link #getLatestMessageId()} method will throw an {@link java.lang.IllegalStateException IllegalStateException}
*
* @return True, if a latest message id is available for retrieval by {@link #getLatestMessageId()}
*
* @see #getLatestMessageId()
*/
boolean hasLatestMessage();
/**
* This method is a shortcut method to return the following information in the following situation:
* If the MessageChannel is instance of..
* <ul>
* <li><b>TextChannel</b> - Returns {@link TextChannel#getName()}</li>
* <li><b>PrivateChannel</b> Returns {@link PrivateChannel#getUser()}{@link net.dv8tion.jda.core.entities.User#getName() .getName()}</li>
* <li><b>Group</b> - Returns {@link net.dv8tion.jda.client.entities.Group#getName() Group.getName()}</li>
* </ul>
*
* @return Possibly-null "name" of the MessageChannel. Different implementations determine what the name. Only
* {@link net.dv8tion.jda.client.entities.Group Group} could have a {@code null} name.
*/
String getName();
/**
* The {@link net.dv8tion.jda.core.entities.ChannelType ChannelType} of this MessageChannel.
*
* @return The ChannelType for this channel
*/
ChannelType getType();
/**
* Returns the {@link net.dv8tion.jda.core.JDA JDA} instance of this MessageChannel
*
* @return the corresponding JDA instance
*/
JDA getJDA();
/**
* Sends a plain text message to this channel.
* <br>This will fail if this channel is an instance of {@link net.dv8tion.jda.core.entities.TextChannel TextChannel} and
* the currently logged in account does not have permissions to send a message to this channel.
* <br>To determine if you are able to send a message in a {@link net.dv8tion.jda.core.entities.TextChannel TextChannel}
* use {@link net.dv8tion.jda.core.entities.TextChannel#canTalk() TextChannel.canTalk()}.
*
* <p>This method is a shortcut to {@link #sendMessage(Message)} by way of using a {@link net.dv8tion.jda.core.MessageBuilder MessageBuilder}
* internally to build the provided {@code text} into a Message.
* <pre>sendMessage(new MessageBuilder().append(text).build())</pre>
*
* <p>For {@link net.dv8tion.jda.core.requests.ErrorResponse} information, refer to {@link #sendMessage(Message)}.
*
* @param text
* the text to build into a Message to send to the MessageChannel.
*
* @throws net.dv8tion.jda.core.exceptions.PermissionException
* If this is a {@link net.dv8tion.jda.core.entities.TextChannel TextChannel} and the logged in account does
* not have
* <ul>
* <li>{@link net.dv8tion.jda.core.Permission#MESSAGE_READ Permission.MESSAGE_READ}</li>
* <li>{@link net.dv8tion.jda.core.Permission#MESSAGE_WRITE Permission.MESSAGE_WRITE}</li>
* </ul>
* @throws net.dv8tion.jda.client.exceptions.VerificationLevelException
* If this is a {@link net.dv8tion.jda.core.entities.TextChannel} and
* {@link net.dv8tion.jda.core.entities.TextChannel#getGuild() TextChannel.getGuild()}{@link net.dv8tion.jda.core.entities.Guild#checkVerification() .checkVerification()}
* returns false.
* @throws java.lang.IllegalArgumentException
* if the provided text is null, empty or longer than 2000 characters
*
* @return {@link net.dv8tion.jda.core.requests.RestAction RestAction} - Type: {@link net.dv8tion.jda.core.entities.Message Message}
* <br>The newly created Message after it has been sent to Discord.
*
* @see net.dv8tion.jda.core.MessageBuilder
*/
default RestAction<Message> sendMessage(String text)
{
Args.notEmpty(text, "Provided text for message");
Args.check(text.length() <= 2000, "Provided text for message must be less than 2000 characters in length");
return sendMessage(new MessageBuilder().append(text).build());
}
/**
* Sends a formatted text message to this channel.
* <br>This will fail if this channel is an instance of {@link net.dv8tion.jda.core.entities.TextChannel TextChannel} and
* the currently logged in account does not have permissions to send a message to this channel.
* <br>To determine if you are able to send a message in a {@link net.dv8tion.jda.core.entities.TextChannel TextChannel}
* use {@link net.dv8tion.jda.core.entities.TextChannel#canTalk() TextChannel.canTalk()}.
*
* <p>This method is a shortcut to {@link #sendMessage(Message)} by way of using a {@link net.dv8tion.jda.core.MessageBuilder MessageBuilder}
* and using its {@link net.dv8tion.jda.core.MessageBuilder#appendFormat(String, Object...)} method.
* <br>For more information on how to format your input, refer to the docs of the method mentioned above.
*
* <p>For {@link net.dv8tion.jda.core.requests.ErrorResponse} information, refer to {@link #sendMessage(Message)}.
*
* @param format
* The string that should be formatted, if this is {@code null} or empty
* the content of the Message would be empty and cause a builder exception.
* @param args
* The arguments for your format
*
* @throws net.dv8tion.jda.core.exceptions.PermissionException
* If this is a {@link net.dv8tion.jda.core.entities.TextChannel TextChannel} and the logged in account does
* not have
* <ul>
* <li>{@link net.dv8tion.jda.core.Permission#MESSAGE_READ Permission.MESSAGE_READ}</li>
* <li>{@link net.dv8tion.jda.core.Permission#MESSAGE_WRITE Permission.MESSAGE_WRITE}</li>
* </ul>
* @throws net.dv8tion.jda.client.exceptions.VerificationLevelException
* If this is a {@link net.dv8tion.jda.core.entities.TextChannel} and
* {@link net.dv8tion.jda.core.entities.TextChannel#getGuild() TextChannel.getGuild()}{@link net.dv8tion.jda.core.entities.Guild#checkVerification() .checkVerification()}
* returns false.
* @throws java.lang.IllegalArgumentException
* If the provided format text is {@code null}, empty or longer than 2000 characters
*
* @return {@link net.dv8tion.jda.core.requests.RestAction RestAction} - Type: {@link net.dv8tion.jda.core.entities.Message Message}
* <br>The newly created Message after it has been sent to Discord.
*/
default RestAction<Message> sendMessage(String format, Object... args)
{
Args.notEmpty(format, "Format");
return sendMessage(new MessageBuilder().appendFormat(format, args).build());
}
/**
* Sends a specified {@link net.dv8tion.jda.core.entities.MessageEmbed MessageEmbed} as a {@link net.dv8tion.jda.core.entities.Message Message}
* to this channel.
* <br>This will fail if this channel is an instance of {@link net.dv8tion.jda.core.entities.TextChannel TextChannel} and
* the currently logged in account does not have permissions to send a message to this channel.
* <br>To determine if you are able to send a message in a {@link net.dv8tion.jda.core.entities.TextChannel TextChannel}
* use {@link net.dv8tion.jda.core.entities.TextChannel#canTalk() TextChannel#canTalk}.
*
* <p>This method is a shortcut to {@link #sendMessage(Message)} by way of using a {@link net.dv8tion.jda.core.MessageBuilder MessageBuilder}
* internally to build the provided {@code embed} into a Message.
* <pre>sendMessage(new MessageBuilder().setEmbed(embed).build())</pre>
*
* <p>For {@link net.dv8tion.jda.core.requests.ErrorResponse} information, refer to {@link #sendMessage(Message)}.
*
* @param embed
* the {@link net.dv8tion.jda.core.entities.MessageEmbed MessageEmbed} to send
*
* @throws net.dv8tion.jda.core.exceptions.PermissionException
* If this is a {@link net.dv8tion.jda.core.entities.TextChannel TextChannel} and the logged in account does
* not have
* <ul>
* <li>{@link net.dv8tion.jda.core.Permission#MESSAGE_READ Permission.MESSAGE_READ}</li>
* <li>{@link net.dv8tion.jda.core.Permission#MESSAGE_WRITE Permission.MESSAGE_WRITE}</li>
* <li>{@link net.dv8tion.jda.core.Permission#MESSAGE_EMBED_LINKS Permission.MESSAGE_EMBED_LINKS}</li>
* </ul>
* @throws net.dv8tion.jda.client.exceptions.VerificationLevelException
* If this is a {@link net.dv8tion.jda.core.entities.TextChannel} and
* {@link net.dv8tion.jda.core.entities.TextChannel#getGuild() TextChannel.getGuild()}{@link net.dv8tion.jda.core.entities.Guild#checkVerification() .checkVerification()}
* returns false.
* @throws java.lang.IllegalArgumentException
* if the provided embed is {@code null} or if the provided {@link net.dv8tion.jda.core.entities.MessageEmbed MessageEmbed}
* is not {@link net.dv8tion.jda.core.entities.MessageEmbed#isSendable(net.dv8tion.jda.core.AccountType) sendable}
*
* @return {@link net.dv8tion.jda.core.requests.RestAction RestAction} - Type: {@link net.dv8tion.jda.core.entities.Message Message}
* <br>The newly created Message after it has been sent to Discord.
*
* @see net.dv8tion.jda.core.MessageBuilder
* @see net.dv8tion.jda.core.EmbedBuilder
*/
default RestAction<Message> sendMessage(MessageEmbed embed)
{
Args.notNull(embed, "Provided embed");
return sendMessage(new MessageBuilder().setEmbed(embed).build());
}
/**
* Sends a specified {@link net.dv8tion.jda.core.entities.Message Message} to this channel.
* <br>This will fail if this channel is an instance of {@link net.dv8tion.jda.core.entities.TextChannel TextChannel} and
* the currently logged in account does not have permissions to send a message to this channel.
* <br>To determine if you are able to send a message in a {@link net.dv8tion.jda.core.entities.TextChannel TextChannel}
* use {@link net.dv8tion.jda.core.entities.TextChannel#canTalk() TextChannel#canTalk}.
*
* <p>The following {@link net.dv8tion.jda.core.requests.ErrorResponse ErrorResponses} are possible:
* <ul>
* <li>{@link net.dv8tion.jda.core.requests.ErrorResponse#MISSING_ACCESS MISSING_ACCESS}
* <br>The request was attempted after the account lost access to the
* {@link net.dv8tion.jda.core.entities.Guild Guild} or {@link net.dv8tion.jda.client.entities.Group Group}
* typically due to being kicked or removed, or after {@link net.dv8tion.jda.core.Permission#MESSAGE_READ Permission.MESSAGE_READ}
* was revoked in the {@link net.dv8tion.jda.core.entities.TextChannel TextChannel}</li>
*
* <li>{@link net.dv8tion.jda.core.requests.ErrorResponse#MISSING_PERMISSIONS MISSING_PERMISSIONS}
* <br>The send request was attempted after the account lost {@link net.dv8tion.jda.core.Permission#MESSAGE_WRITE Permission.MESSAGE_WRITE} in
* the {@link net.dv8tion.jda.core.entities.TextChannel TextChannel}.</li>
*
* <li>{@link net.dv8tion.jda.core.requests.ErrorResponse#UNAUTHORIZED UNAUTHORIZED}
* <br>If this is a {@link net.dv8tion.jda.core.entities.PrivateChannel PrivateChannel} and the recipient User blocked you</li>
*
* <li>{@link net.dv8tion.jda.core.requests.ErrorResponse#CANNOT_SEND_TO_USER CANNOT_SEND_TO_USER}
* <br>If this is a {@link net.dv8tion.jda.core.entities.PrivateChannel PrivateChannel} and the currently logged in account
* does not share any Guilds with the recipient User</li>
*
* <li>{@link net.dv8tion.jda.core.requests.ErrorResponse#UNKNOWN_CHANNEL UNKNOWN_CHANNEL}
* <br>The send request was attempted after the channel was deleted.</li>
* </ul>
*
* @param msg
* the {@link net.dv8tion.jda.core.entities.Message Message} to send
*
* @throws net.dv8tion.jda.core.exceptions.PermissionException
* If this is a {@link net.dv8tion.jda.core.entities.TextChannel TextChannel} and the logged in account does
* not have
* <ul>
* <li>{@link net.dv8tion.jda.core.Permission#MESSAGE_READ Permission.MESSAGE_READ}</li>
* <li>{@link net.dv8tion.jda.core.Permission#MESSAGE_WRITE Permission.MESSAGE_WRITE}</li>
* <li>{@link net.dv8tion.jda.core.Permission#MESSAGE_EMBED_LINKS Permission.MESSAGE_EMBED_LINKS} (if this message is only an embed)</li>
* </ul>
* @throws net.dv8tion.jda.client.exceptions.VerificationLevelException
* If this is a {@link net.dv8tion.jda.core.entities.TextChannel} and
* {@link net.dv8tion.jda.core.entities.TextChannel#getGuild() TextChannel.getGuild()}{@link net.dv8tion.jda.core.entities.Guild#checkVerification() .checkVerification()}
* returns false.
* @throws java.lang.IllegalArgumentException
* if the provided message is {@code null} or the provided {@link net.dv8tion.jda.core.entities.Message Message}
* contains an {@link net.dv8tion.jda.core.entities.MessageEmbed MessageEmbed}
* that is not {@link net.dv8tion.jda.core.entities.MessageEmbed#isSendable(net.dv8tion.jda.core.AccountType) sendable}
*
* @return {@link net.dv8tion.jda.core.requests.RestAction RestAction} - Type: {@link net.dv8tion.jda.core.entities.Message Message}
* <br>The newly created Message after it has been sent to Discord.
*
* @see net.dv8tion.jda.core.MessageBuilder
*/
default RestAction<Message> sendMessage(Message msg)
{
Args.notNull(msg, "Message");
if (!msg.getEmbeds().isEmpty())
{
AccountType type = getJDA().getAccountType();
MessageEmbed embed = msg.getEmbeds().get(0);
Args.check(embed.isSendable(type),
"Provided Message contains an embed with a length greater than %d characters, which is the max for %s accounts!",
type == AccountType.BOT ? MessageEmbed.EMBED_MAX_LENGTH_BOT : MessageEmbed.EMBED_MAX_LENGTH_CLIENT, type);
}
Route.CompiledRoute route = Route.Messages.SEND_MESSAGE.compile(getId());
JSONObject json = ((MessageImpl) msg).toJSONObject();
return new RestAction<Message>(getJDA(), route, json)
{
@Override
protected void handleResponse(Response response, Request request)
{
if (response.isOk())
{
Message m = EntityBuilder.get(getJDA()).createMessage(response.getObject(), MessageChannel.this, false);
request.onSuccess(m);
}
else
{
request.onFailure(response);
}
}
};
}
/**
* Uploads a file to the Discord servers and sends it to this {@link net.dv8tion.jda.core.entities.MessageChannel MessageChannel}.
* Sends the provided {@link net.dv8tion.jda.core.entities.Message Message} with the uploaded file.
* <br>If you do not wish to send a Message with the uploaded file, you can provide {@code null} for
* the {@code message} parameter.
*
* <p>This is a shortcut to {@link #sendFile(java.io.File, String, Message)} by way of using {@link java.io.File#getName()}.
* <pre>sendFile(file, file.getName(), message)</pre>
*
* <p>For {@link net.dv8tion.jda.core.requests.ErrorResponse} information, refer to the documentation for {@link #sendFile(java.io.File, String, Message)}.
*
* @param file
* The file to upload to the {@link net.dv8tion.jda.core.entities.MessageChannel MessageChannel}.
* @param message
* The message to be sent along with the uploaded file. This value can be {@code null}.
*
* @throws IOException
* If an I/O error occurs while reading the File.
* @throws java.lang.IllegalArgumentException
* <ul>
* <li>Provided {@code file} is null.</li>
* <li>Provided {@code file} does not exist.</li>
* <li>Provided {@code file} is unreadable.</li>
* <li>Provided {@code file} is greater than 8MB.</li>
* <li>Provided {@link net.dv8tion.jda.core.entities.Message Message} is not {@code null} <b>and</b>
* contains a {@link net.dv8tion.jda.core.entities.MessageEmbed MessageEmbed} which
* is not {@link net.dv8tion.jda.core.entities.MessageEmbed#isSendable(net.dv8tion.jda.core.AccountType) sendable}</li>
* </ul>
* @throws net.dv8tion.jda.core.exceptions.PermissionException
* If this is a {@link net.dv8tion.jda.core.entities.TextChannel TextChannel} and the logged in account does not have
* <ul>
* <li>{@link net.dv8tion.jda.core.Permission#MESSAGE_READ Permission.MESSAGE_READ}</li>
* <li>{@link net.dv8tion.jda.core.Permission#MESSAGE_WRITE Permission.MESSAGE_WRITE}</li>
* <li>{@link net.dv8tion.jda.core.Permission#MESSAGE_ATTACH_FILES Permission.MESSAGE_ATTACH_FILES}</li>
* </ul>
*
* @return {@link net.dv8tion.jda.core.requests.RestAction RestAction} - Type: {@link net.dv8tion.jda.core.entities.Message Message}
* <br>The {@link net.dv8tion.jda.core.entities.Message Message} created from this upload.
*/
default RestAction<Message> sendFile(File file, Message message) throws IOException
{
Args.notNull(file, "file");
return sendFile(file, file.getName(), message);
}
/**
* Uploads a file to the Discord servers and sends it to this {@link net.dv8tion.jda.core.entities.MessageChannel MessageChannel}.
* Sends the provided {@link net.dv8tion.jda.core.entities.Message Message} with the uploaded file.
* <br>If you do not wish to send a Message with the uploaded file, you can provide {@code null} for
* the {@code message} parameter.
*
* <p>The {@code fileName} parameter is used to inform Discord about what the file should be called. This is 2 fold:
* <ol>
* <li>The file name provided is the name that is found in {@link net.dv8tion.jda.core.entities.Message.Attachment#getFileName()}
* after upload and it is the name that will show up in the client when the upload is displayed.
* <br>Note: The fileName does not show up on the Desktop client for images. It does on mobile however.</li>
* <li>The extension of the provided fileName also determines who Discord will treat the file. Discord currently only
* has special handling for image file types, but the fileName's extension must indicate that it is an image file.
* This means it has to end in something like .png, .jpg, .jpeg, .gif, etc. As a note, you can also not provide
* a full name for the file and instead ONLY provide the extension like "png" or "gif" and Discord will generate
* a name for the upload and append the fileName as the extension.</li>
* </ol>
*
* <p>The following {@link net.dv8tion.jda.core.requests.ErrorResponse ErrorResponses} are possible:
* <ul>
* <li>{@link net.dv8tion.jda.core.requests.ErrorResponse#MISSING_ACCESS MISSING_ACCESS}
* <br>The send request was attempted after the account lost access to the
* {@link net.dv8tion.jda.core.entities.Guild Guild} or {@link net.dv8tion.jda.client.entities.Group Group}
* typically due to being kicked or removed.</li>
*
* <li>{@link net.dv8tion.jda.core.requests.ErrorResponse#MISSING_PERMISSIONS MISSING_PERMISSIONS}
* <br>The send request was attempted after the account lost {@link net.dv8tion.jda.core.Permission#MESSAGE_WRITE Permission.MESSAGE_WRITE} or
* {@link net.dv8tion.jda.core.Permission#MESSAGE_ATTACH_FILES Permission.MESSAGE_ATTACH_FILES}
* in the {@link net.dv8tion.jda.core.entities.TextChannel TextChannel}.</li>
*
* <li>{@link net.dv8tion.jda.core.requests.ErrorResponse#UNAUTHORIZED UNAUTHORIZED}
* <br>If this is a {@link net.dv8tion.jda.core.entities.PrivateChannel PrivateChannel} and the recipient User blocked you</li>
*
* <li>{@link net.dv8tion.jda.core.requests.ErrorResponse#CANNOT_SEND_TO_USER CANNOT_SEND_TO_USER}
* <br>If this is a {@link net.dv8tion.jda.core.entities.PrivateChannel PrivateChannel} and the currently logged in account
* does not share any Guilds with the recipient User</li>
*
* <li>{@link net.dv8tion.jda.core.requests.ErrorResponse#UNKNOWN_CHANNEL UNKNOWN_CHANNEL}
* <br>The send request was attempted after the channel was deleted.</li>
* </ul>
*
* @param file
* The file to upload to the {@link net.dv8tion.jda.core.entities.MessageChannel MessageChannel}.
* @param fileName
* The name that should be sent to discord
* @param message
* The message to be sent along with the uploaded file. This value can be {@code null}.
*
* @throws IOException
* If an I/O error occurs while reading the File.
* @throws java.lang.IllegalArgumentException
* <ul>
* <li>Provided {@code file} is null.</li>
* <li>Provided {@code file} does not exist.</li>
* <li>Provided {@code file} is unreadable.</li>
* <li>Provided {@code file} is greater than 8MB.</li>
* <li>Provided {@link net.dv8tion.jda.core.entities.Message Message} is not {@code null} <b>and</b>
* contains a {@link net.dv8tion.jda.core.entities.MessageEmbed MessageEmbed} which
* is not {@link net.dv8tion.jda.core.entities.MessageEmbed#isSendable(net.dv8tion.jda.core.AccountType) sendable}</li>
* </ul>
* @throws net.dv8tion.jda.core.exceptions.PermissionException
* If this is a {@link net.dv8tion.jda.core.entities.TextChannel TextChannel} and the logged in account does not have
* <ul>
* <li>{@link net.dv8tion.jda.core.Permission#MESSAGE_READ Permission.MESSAGE_READ}</li>
* <li>{@link net.dv8tion.jda.core.Permission#MESSAGE_WRITE Permission.MESSAGE_WRITE}</li>
* <li>{@link net.dv8tion.jda.core.Permission#MESSAGE_ATTACH_FILES Permission.MESSAGE_ATTACH_FILES}</li>
* </ul>
*
* @return {@link net.dv8tion.jda.core.requests.RestAction RestAction} - Type: {@link net.dv8tion.jda.core.entities.Message Message}
* <br>The {@link net.dv8tion.jda.core.entities.Message Message} created from this upload.
*/
default RestAction<Message> sendFile(File file, String fileName, Message message) throws IOException
{
Args.notNull(file, "file");
Args.check(file.exists() && file.canRead(),
"Provided file is either null, doesn't exist or is not readable!");
Args.check(file.length() <= 8<<20, //8MB, TODO: deal with Discord Nitro allowing 50MB files.
"File is to big! Max file-size is 8MB");
return sendFile(IOUtil.readFully(file), fileName, message);
}
/**
* Uploads a file to the Discord servers and sends it to this {@link net.dv8tion.jda.core.entities.MessageChannel MessageChannel}.
* Sends the provided {@link net.dv8tion.jda.core.entities.Message Message} with the uploaded file.
* <br>If you do not wish to send a Message with the uploaded file, you can provide {@code null} for
* the {@code message} parameter.
* <br>This allows you to send an {@link java.io.InputStream InputStream} as substitute to a file.
*
* <p>For information about the {@code fileName} parameter, Refer to the documentation for {@link #sendFile(java.io.File, String, Message)}.
* <br>For {@link net.dv8tion.jda.core.requests.ErrorResponse} information, refer to the documentation for {@link #sendFile(java.io.File, String, Message)}.
*
* @param data
* The InputStream data to upload to the {@link net.dv8tion.jda.core.entities.MessageChannel MessageChannel}.
* @param fileName
* The name that should be sent to discord
* <br>Refer to the documentation for {@link #sendFile(java.io.File, String, Message)} for information about this parameter.
* @param message
* The message to be sent along with the uploaded file. This value can be {@code null}.
*
* @throws java.lang.IllegalArgumentException
* If the provided filename is {@code null} or {@code empty}.
* @throws net.dv8tion.jda.core.exceptions.PermissionException
* If this is a {@link net.dv8tion.jda.core.entities.TextChannel TextChannel} and the logged in account does not have
* <ul>
* <li>{@link net.dv8tion.jda.core.Permission#MESSAGE_READ Permission.MESSAGE_READ}</li>
* <li>{@link net.dv8tion.jda.core.Permission#MESSAGE_WRITE Permission.MESSAGE_WRITE}</li>
* <li>{@link net.dv8tion.jda.core.Permission#MESSAGE_ATTACH_FILES Permission.MESSAGE_ATTACH_FILES}</li>
* </ul>
*
* @return {@link net.dv8tion.jda.core.requests.RestAction RestAction} - Type: {@link net.dv8tion.jda.core.entities.Message Message}
* <br>The {@link net.dv8tion.jda.core.entities.Message Message} created from this upload.
*/
default RestAction<Message> sendFile(InputStream data, String fileName, Message message)
{
Args.notNull(data, "data InputStream");
Args.notNull(fileName, "fileName");
Route.CompiledRoute route = Route.Messages.SEND_MESSAGE.compile(getId());
MultipartBody body = Unirest.post(Requester.DISCORD_API_PREFIX + route.getCompiledRoute())
.fields(null); //We use this to change from an HttpRequest to a MultipartBody
body.field("file", data, fileName);
if (message != null)
{
if (!message.getEmbeds().isEmpty())
{
AccountType type = getJDA().getAccountType();
MessageEmbed embed = message.getEmbeds().get(0);
Args.check(embed.isSendable(type),
"Provided Message contains an embed with a length greater than %d characters, which is the max for %s accounts!",
type == AccountType.BOT ? MessageEmbed.EMBED_MAX_LENGTH_BOT : MessageEmbed.EMBED_MAX_LENGTH_CLIENT, type);
}
body.field("payload_json", ((MessageImpl) message).toJSONObject().toString());
}
return new RestAction<Message>(getJDA(), route, body)
{
@Override
protected void handleResponse(Response response, Request request)
{
if (response.isOk())
request.onSuccess(EntityBuilder.get(api).createMessage(response.getObject(), MessageChannel.this, false));
else
request.onFailure(response);
}
};
}
/**
* Uploads a file to the Discord servers and sends it to this {@link net.dv8tion.jda.core.entities.MessageChannel MessageChannel}.
* Sends the provided {@link net.dv8tion.jda.core.entities.Message Message} with the uploaded file.
* <br>If you do not wish to send a Message with the uploaded file, you can provide {@code null} for
* the {@code message} parameter.
* <br>This allows you to send an {@code byte[]} as substitute to a file.
*
* <p>For information about the {@code fileName} parameter, Refer to the documentation for {@link #sendFile(java.io.File, String, Message)}.
* <br>For {@link net.dv8tion.jda.core.requests.ErrorResponse} information, refer to the documentation for {@link #sendFile(java.io.File, String, Message)}.
*
* @param data
* The {@code byte[]} data to upload to the {@link net.dv8tion.jda.core.entities.MessageChannel MessageChannel}.
* @param fileName
* The name that should be sent to discord.
* <br>Refer to the documentation for {@link #sendFile(java.io.File, String, Message)} for information about this parameter.
* @param message
* The message to be sent along with the uploaded file. This value can be {@code null}.
*
* @throws java.lang.IllegalArgumentException
* <ul>
* <li>If the provided filename is {@code null} or {@code empty} or the provided data is larger than 8MB.</li>
* <li>If the provided {@link net.dv8tion.jda.core.entities.Message Message}
* contains an {@link net.dv8tion.jda.core.entities.MessageEmbed MessageEmbed}
* that is not {@link net.dv8tion.jda.core.entities.MessageEmbed#isSendable(net.dv8tion.jda.core.AccountType) sendable}</li>
* </ul>
* @throws net.dv8tion.jda.core.exceptions.PermissionException
* If this is a {@link net.dv8tion.jda.core.entities.TextChannel TextChannel} and the logged in account does not have
* <ul>
* <li>{@link net.dv8tion.jda.core.Permission#MESSAGE_READ Permission.MESSAGE_READ}</li>
* <li>{@link net.dv8tion.jda.core.Permission#MESSAGE_WRITE Permission.MESSAGE_WRITE}</li>
* <li>{@link net.dv8tion.jda.core.Permission#MESSAGE_ATTACH_FILES Permission.MESSAGE_ATTACH_FILES}</li>
* </ul>
*
* @return {@link net.dv8tion.jda.core.requests.RestAction RestAction} - Type: {@link net.dv8tion.jda.core.entities.Message Message}
* <br>The {@link net.dv8tion.jda.core.entities.Message Message} created from this upload.
*/
default RestAction<Message> sendFile(byte[] data, String fileName, Message message)
{
Args.notNull(data, "file data[]");
Args.notNull(fileName, "fileName");
Args.check(data.length <= 8<<20, //8MB
"Provided data is too large! Max file-size is 8MB");
Route.CompiledRoute route = Route.Messages.SEND_MESSAGE.compile(getId());
MultipartBody body = Unirest.post(Requester.DISCORD_API_PREFIX + route.getCompiledRoute())
.fields(null); //We use this to change from an HttpRequest to a MultipartBody
body.field("file", data, fileName);
if (message != null)
{
if (!message.getEmbeds().isEmpty())
{
AccountType type = getJDA().getAccountType();
MessageEmbed embed = message.getEmbeds().get(0);
Args.check(embed.isSendable(type),
"Provided Message contains an embed with a length greater than %d characters, which is the max for %s accounts!",
type == AccountType.BOT ? MessageEmbed.EMBED_MAX_LENGTH_BOT : MessageEmbed.EMBED_MAX_LENGTH_CLIENT, type);
}
body.field("payload_json", ((MessageImpl) message).toJSONObject().toString());
}
return new RestAction<Message>(getJDA(), route, body)
{
@Override
protected void handleResponse(Response response, Request request)
{
if (response.isOk())
request.onSuccess(EntityBuilder.get(api).createMessage(response.getObject(), MessageChannel.this, false));
else
request.onFailure(response);
}
};
}
/**
* Attempts to get a {@link net.dv8tion.jda.core.entities.Message Message} from the Discord's servers that has
* the same id as the id provided.
* <br>Note: when retrieving a Message, you must retrieve it from the channel it was sent in!
*
* <p>The following {@link net.dv8tion.jda.core.requests.ErrorResponse ErrorResponses} are possible:
* <ul>
* <li>{@link net.dv8tion.jda.core.requests.ErrorResponse#MISSING_ACCESS MISSING_ACCESS}
* <br>The request was attempted after the account lost access to the
* {@link net.dv8tion.jda.core.entities.Guild Guild} or {@link net.dv8tion.jda.client.entities.Group Group}
* typically due to being kicked or removed, or after {@link net.dv8tion.jda.core.Permission#MESSAGE_READ Permission.MESSAGE_READ}
* was revoked in the {@link net.dv8tion.jda.core.entities.TextChannel TextChannel}</li>
*
* <li>{@link net.dv8tion.jda.core.requests.ErrorResponse#MISSING_PERMISSIONS MISSING_PERMISSIONS}
* <br>The request was attempted after the account lost {@link net.dv8tion.jda.core.Permission#MESSAGE_HISTORY Permission.MESSAGE_HISTORY}
* in the {@link net.dv8tion.jda.core.entities.TextChannel TextChannel}.</li>
*
* <li>{@link net.dv8tion.jda.core.requests.ErrorResponse#UNKNOWN_MESSAGE UNKNOWN_MESSAGE}
* <br>The provided {@code id} does not refer to a message sent in this channel or the message has already been deleted.</li>
*
* <li>{@link net.dv8tion.jda.core.requests.ErrorResponse#UNKNOWN_CHANNEL UNKNOWN_CHANNEL}
* <br>The request was attempted after the channel was deleted.</li>
* </ul>
*
* @param messageId
* The id of the sought after Message
*
* @throws IllegalArgumentException
* if the provided {@code messageId} is null or empty.
* @throws net.dv8tion.jda.core.exceptions.PermissionException
* If this is a {@link net.dv8tion.jda.core.entities.TextChannel TextChannel} and the logged in account does not have
* <ul>
* <li>{@link net.dv8tion.jda.core.Permission#MESSAGE_READ Permission.MESSAGE_READ}</li>
* <li>{@link net.dv8tion.jda.core.Permission#MESSAGE_HISTORY Permission.MESSAGE_HISTORY}</li>
* </ul>
*
* @return {@link net.dv8tion.jda.core.requests.RestAction RestAction} - Type: Message
* <br>The Message defined by the provided id.
*/
default RestAction<Message> getMessageById(String messageId)
{
if (getJDA().getAccountType() != AccountType.BOT)
throw new AccountTypeException(AccountType.BOT);
Args.notEmpty(messageId, "Provided messageId");
Route.CompiledRoute route = Route.Messages.GET_MESSAGE.compile(getId(), messageId);
return new RestAction<Message>(getJDA(), route, null)
{
@Override
protected void handleResponse(Response response, Request request)
{
if (response.isOk())
{
Message m = EntityBuilder.get(getJDA()).createMessage(response.getObject(), MessageChannel.this, false);
request.onSuccess(m);
}
else
request.onFailure(response);
}
};
}
/**
* Attempts to delete a {@link net.dv8tion.jda.core.entities.Message Message} from the Discord servers that has
* the same id as the id provided.
*
* <p>The following {@link net.dv8tion.jda.core.requests.ErrorResponse ErrorResponses} are possible:
* <ul>
* <li>{@link net.dv8tion.jda.core.requests.ErrorResponse#MISSING_ACCESS MISSING_ACCESS}
* <br>The request was attempted after the account lost access to the
* {@link net.dv8tion.jda.core.entities.Guild Guild} or {@link net.dv8tion.jda.client.entities.Group Group}
* typically due to being kicked or removed, or after {@link net.dv8tion.jda.core.Permission#MESSAGE_READ Permission.MESSAGE_READ}
* was revoked in the {@link net.dv8tion.jda.core.entities.TextChannel TextChannel}</li>
*
* <li>{@link net.dv8tion.jda.core.requests.ErrorResponse#MISSING_PERMISSIONS MISSING_PERMISSIONS}
* <br>The request attempted to delete a Message in a {@link net.dv8tion.jda.core.entities.TextChannel TextChannel}
* that was not sent by the currently logged in account.</li>
*
* <li>{@link net.dv8tion.jda.core.requests.ErrorResponse#INVALID_DM_ACTION INVALID_DM_ACTION}
* <br>Attempted to delete a Message in a {@link net.dv8tion.jda.core.entities.PrivateChannel PrivateChannel} or
* {@link net.dv8tion.jda.client.entities.Group Group} that was not sent by the currently logged in account.</li>
*
* <li>{@link net.dv8tion.jda.core.requests.ErrorResponse#UNKNOWN_MESSAGE UNKNOWN_MESSAGE}
* <br>The provided {@code id} does not refer to a message sent in this channel or the message has already been deleted.</li>
*
* <li>{@link net.dv8tion.jda.core.requests.ErrorResponse#UNKNOWN_CHANNEL UNKNOWN_CHANNEL}
* <br>The request was attempted after the channel was deleted.</li>
* </ul>
*
* @param messageId
* The id of the Message that should be deleted
*
* @throws IllegalArgumentException
* if the provided messageId is null
* @throws net.dv8tion.jda.core.exceptions.PermissionException
* If this is a {@link net.dv8tion.jda.core.entities.TextChannel TextChannel} and the logged in account does not have
* {@link net.dv8tion.jda.core.Permission#MESSAGE_READ Permission.MESSAGE_READ}.
*
* @return {@link net.dv8tion.jda.core.requests.RestAction RestAction} - Type: Void
*/
default RestAction<Void> deleteMessageById(String messageId)
{
Args.notEmpty(messageId, "messageId");
Route.CompiledRoute route = Route.Messages.DELETE_MESSAGE.compile(getId(), messageId);
return new RestAction<Void>(getJDA(), route, null) {
@Override
protected void handleResponse(Response response, Request request)
{
if (response.isOk())
request.onSuccess(null);
else
{
request.onFailure(response);
}
}
};
}
/**
* Creates a new {@link MessageHistory MessageHistory} object for each call of this method.
* <br>MessageHistory is <b>NOT</b> an internal message cache, but rather it queries the Discord servers for previously sent messages.
*
* @return A {@link net.dv8tion.jda.core.entities.MessageHistory MessageHistory} related to this channel.
*/
default MessageHistory getHistory()
{
return new MessageHistory(this);
}
/**
* Uses the provided {@link net.dv8tion.jda.core.entities.Message Message} as a marker and retrieves messages around
* the marker. The {@code limit} determines the amount of message retrieved near the marker. Discord will
* attempt to evenly split the limit between before and after the marker, however in the case that the marker is set
* near the beginning or near the end of the channel's history the amount of messages on each side of the marker may
* be different, and their total count may not equal the provided {@code limit}.
*
* <p><b>Examples:</b>
* <br>Retrieve 100 messages from the middle of history. {@literal >}100 message exist in history and the marker is {@literal >}50 messages
* from the edge of history.
* <br>{@code getHistoryAround(message, 100)} - This will retrieve 100 messages from history, 50 before the marker
* and 50 after the marker.
*
* <p>Retrieve 10 messages near the end of history. Provided message is the 3rd most recent message.
* <br>{@code getHistoryAround(message, 10)} - This will retrieve 10 messages from history, 8 before the marker
* and 2 after the marker.
*
* <p>The following {@link net.dv8tion.jda.core.requests.ErrorResponse ErrorResponses} are possible:
* <ul>
* <li>{@link net.dv8tion.jda.core.requests.ErrorResponse#MISSING_ACCESS MISSING_ACCESS}
* <br>The request was attempted after the account lost access to the
* {@link net.dv8tion.jda.core.entities.Guild Guild} or {@link net.dv8tion.jda.client.entities.Group Group}
* typically due to being kicked or removed, or after {@link net.dv8tion.jda.core.Permission#MESSAGE_READ Permission.MESSAGE_READ}
* was revoked in the {@link net.dv8tion.jda.core.entities.TextChannel TextChannel}</li>
*
* <li>{@link net.dv8tion.jda.core.requests.ErrorResponse#MISSING_PERMISSIONS MISSING_PERMISSIONS}
* <br>The request was attempted after the account lost
* {@link net.dv8tion.jda.core.Permission#MESSAGE_HISTORY Permission.MESSAGE_HISTORY} in the
* {@link net.dv8tion.jda.core.entities.TextChannel TextChannel}.</li>
*
* <li>{@link net.dv8tion.jda.core.requests.ErrorResponse#UNKNOWN_MESSAGE UNKNOWN_MESSAGE}
* <br>The provided {@code message} has already been deleted, thus could not be used as a marker.</li>
*
* <li>{@link net.dv8tion.jda.core.requests.ErrorResponse#UNKNOWN_CHANNEL UNKNOWN_CHANNEL}
* <br>The request was attempted after the channel was deleted.</li>
* </ul>
*
* @param message
* The {@link net.dv8tion.jda.core.entities.Message Message} that will act as a marker. The provided Message
* must be from this MessageChannel.
* @param limit
* The amount of message to be retrieved around the marker. Minimum: 1, Max: 100.
*
* @throws java.lang.IllegalArgumentException
* <ul>
* <li>Provided {@code message} is {@code null}.</li>
* <li>Provided {@code message} is not from this MessageChannel.</li>
* <li>Provided {@code limit} is less than {@code 1} or greater than {@code 100}.</li>
* </ul>
* @throws net.dv8tion.jda.core.exceptions.PermissionException
* If this is a {@link net.dv8tion.jda.core.entities.TextChannel TextChannel} and the logged in account does not have
* <ul>
* <li>{@link net.dv8tion.jda.core.Permission#MESSAGE_READ Permission.MESSAGE_READ}</li>
* <li>{@link net.dv8tion.jda.core.Permission#MESSAGE_HISTORY Permission.MESSAGE_HISTORY}</li>
* </ul>
*
* @return {@link net.dv8tion.jda.core.requests.RestAction RestAction} - Type: {@link net.dv8tion.jda.core.entities.MessageHistory MessageHistory}
* <br>Provides a MessageHistory object with message around the provided message loaded into it.
*/
default RestAction<MessageHistory> getHistoryAround(Message message, int limit)
{
Args.notNull(message, "Provided target message");
Args.check(message.getChannel().equals(this), "The provided Message is not from the MessageChannel!");
return getHistoryAround(message.getId(), limit);
}
/**
* Uses the provided {@code id} of a message as a marker and retrieves messages around
* the marker. The {@code limit} determines the amount of message retrieved near the marker. Discord will
* attempt to evenly split the limit between before and after the marker, however in the case that the marker is set
* near the beginning or near the end of the channel's history the amount of messages on each side of the marker may
* be different, and their total count may not equal the provided {@code limit}.
*
* <p><b>Examples:</b>
* <br>Retrieve 100 messages from the middle of history. {@literal >}100 message exist in history and the marker is {@literal >}50 messages
* from the edge of history.
* <br>{@code getHistoryAround(messageId, 100)} - This will retrieve 100 messages from history, 50 before the marker
* and 50 after the marker.
*
* <p>Retrieve 10 messages near the end of history. Provided id is for a message that is the 3rd most recent message.
* <br>{@code getHistoryAround(messageId, 10)} - This will retrieve 10 messages from history, 8 before the marker
* and 2 after the marker.
*
* <p>The following {@link net.dv8tion.jda.core.requests.ErrorResponse ErrorResponses} are possible:
* <ul>
* <li>{@link net.dv8tion.jda.core.requests.ErrorResponse#MISSING_ACCESS MISSING_ACCESS}
* <br>The request was attempted after the account lost access to the
* {@link net.dv8tion.jda.core.entities.Guild Guild} or {@link net.dv8tion.jda.client.entities.Group Group}
* typically due to being kicked or removed, or after {@link net.dv8tion.jda.core.Permission#MESSAGE_READ Permission.MESSAGE_READ}
* was revoked in the {@link net.dv8tion.jda.core.entities.TextChannel TextChannel}</li>
*
* <li>{@link net.dv8tion.jda.core.requests.ErrorResponse#MISSING_PERMISSIONS MISSING_PERMISSIONS}
* <br>The request was attempted after the account lost
* {@link net.dv8tion.jda.core.Permission#MESSAGE_HISTORY Permission.MESSAGE_HISTORY} in the
* {@link net.dv8tion.jda.core.entities.TextChannel TextChannel}.</li>
*
* <li>{@link net.dv8tion.jda.core.requests.ErrorResponse#UNKNOWN_MESSAGE UNKNOWN_MESSAGE}
* <br>The provided {@code messageId} is unknown in this MessageChannel, either due to the id being invalid, or
* the message it referred to has already been deleted, thus could not be used as a marker.</li>
*
* <li>{@link net.dv8tion.jda.core.requests.ErrorResponse#UNKNOWN_CHANNEL UNKNOWN_CHANNEL}
* <br>The request was attempted after the channel was deleted.</li>
* </ul>
*
* @param messageId
* The id of the message that will act as a marker. The id must refer to a message from this MessageChannel.
* @param limit
* The amount of message to be retrieved around the marker. Minimum: 1, Max: 100.
*
* @throws java.lang.IllegalArgumentException
* <ul>
* <li>Provided {@code messageId} is {@code null} or empty.</li>
* <li>Provided {@code limit} is less than {@code 1} or greater than {@code 100}.</li>
* </ul>
* @throws net.dv8tion.jda.core.exceptions.PermissionException
* If this is a {@link net.dv8tion.jda.core.entities.TextChannel TextChannel} and the logged in account does not have
* <ul>
* <li>{@link net.dv8tion.jda.core.Permission#MESSAGE_READ Permission.MESSAGE_READ}</li>
* <li>{@link net.dv8tion.jda.core.Permission#MESSAGE_HISTORY Permission.MESSAGE_HISTORY}</li>
* </ul>
*
* @return {@link net.dv8tion.jda.core.requests.RestAction RestAction} - Type: {@link net.dv8tion.jda.core.entities.MessageHistory MessageHistory}
* <br>Provides a MessageHistory object with message around the provided message loaded into it.
*/
default RestAction<MessageHistory> getHistoryAround(String messageId, int limit)
{
Args.notEmpty(messageId, "Provided messageId");
Args.check(limit >= 1 && limit <= 100, "Provided limit was out of bounds. Minimum: 1, Max: 100. Provided: %d", limit);
Route.CompiledRoute route = Route.Messages.GET_MESSAGE_HISTORY_AROUND.compile(this.getId(), Integer.toString(limit), messageId);
return new RestAction<MessageHistory>(getJDA(), route, null)
{
@Override
protected void handleResponse(Response response, Request request)
{
if (!response.isOk())
{
request.onFailure(response);
return;
}
MessageHistory mHistory = new MessageHistory(MessageChannel.this);
EntityBuilder builder = EntityBuilder.get(api);
LinkedList<Message> msgs = new LinkedList<>();
JSONArray historyJson = response.getArray();
for (int i = 0; i < historyJson.length(); i++)
msgs.add(builder.createMessage(historyJson.getJSONObject(i), MessageChannel.this, false));
msgs.forEach(msg -> mHistory.history.put(msg.getId(), msg));
request.onSuccess(mHistory);
}
};
}
/**
* Sends the typing status to discord. This is what is used to make the message "X is typing..." appear.
* <br>The typing status only lasts for 10 seconds or until a message is sent.
* <br>So if you wish to show continuous typing you will need to call this method once every 10 seconds.
*
* <p>The official discord client sends this every 5 seconds even though the typing status lasts 10.
*
* <p>The following {@link net.dv8tion.jda.core.requests.ErrorResponse ErrorResponses} are possible:
* <ul>
* <li>{@link net.dv8tion.jda.core.requests.ErrorResponse#MISSING_ACCESS MISSING_ACCESS}
* <br>The request was attempted after the account lost access to the
* {@link net.dv8tion.jda.core.entities.Guild Guild} or {@link net.dv8tion.jda.client.entities.Group Group}
* typically due to being kicked or removed, or after {@link net.dv8tion.jda.core.Permission#MESSAGE_READ Permission.MESSAGE_READ}
* or {@link net.dv8tion.jda.core.Permission#MESSAGE_WRITE Permission.MESSAGE_WRITE}
* was revoked in the {@link net.dv8tion.jda.core.entities.TextChannel TextChannel}</li>
*
* <li>{@link net.dv8tion.jda.core.requests.ErrorResponse#UNKNOWN_CHANNEL UNKNOWN_CHANNEL}
* <br>The request was attempted after the channel was deleted.</li>
* </ul>
*
* @throws net.dv8tion.jda.core.exceptions.PermissionException
* If this is a {@link net.dv8tion.jda.core.entities.TextChannel TextChannel} and the logged in account does not have
* <ul>
* <li>{@link net.dv8tion.jda.core.Permission#MESSAGE_READ Permission.MESSAGE_READ}</li>
* <li>{@link net.dv8tion.jda.core.Permission#MESSAGE_WRITE Permission.MESSAGE_WRITE}</li>
* </ul>
*
* @return {@link net.dv8tion.jda.core.requests.RestAction RestAction} - Type: Void
*/
default RestAction<Void> sendTyping()
{
Route.CompiledRoute route = Route.Channels.SEND_TYPING.compile(getId());
return new RestAction<Void>(getJDA(), route, null)
{
@Override
protected void handleResponse(Response response, Request request)
{
if (response.isOk())
request.onSuccess(null);
else
request.onFailure(response);
}
};
}
/**
* Attempts to react to a message represented by the specified {@code messageId}
* in this MessageChannel.
*
* <p>The unicode provided has to be a UTF-8 representation of the emoji
* that is supposed to be represented by the Reaction.
* <br>To retrieve the characters needed you can use an api or
* the official discord client by escaping the emoji (\:emoji-name:)
* and copying the resulting emoji from the sent message.
*
* <p>This method encodes the provided unicode for you.
* <b>Do not encode the emoji before providing the unicode.</b>
*
* <p>The following {@link net.dv8tion.jda.core.requests.ErrorResponse ErrorResponses} are possible:
* <ul>
* <li>{@link net.dv8tion.jda.core.requests.ErrorResponse#MISSING_ACCESS MISSING_ACCESS}
* <br>The request was attempted after the account lost access to the
* {@link net.dv8tion.jda.core.entities.Guild Guild} or {@link net.dv8tion.jda.client.entities.Group Group}
* typically due to being kicked or removed, or after {@link net.dv8tion.jda.core.Permission#MESSAGE_READ Permission.MESSAGE_READ}
* was revoked in the {@link net.dv8tion.jda.core.entities.TextChannel TextChannel}
* <br>Also can happen if the account lost the {@link net.dv8tion.jda.core.Permission#MESSAGE_HISTORY Permission.MESSAGE_HISTORY}</li>
*
*
* <li>{@link net.dv8tion.jda.core.requests.ErrorResponse#MISSING_PERMISSIONS MISSING_PERMISSIONS}
* <br>The request was attempted after the account lost
* {@link net.dv8tion.jda.core.Permission#MESSAGE_ADD_REACTION Permission.MESSAGE_ADD_REACTION} in the
* {@link net.dv8tion.jda.core.entities.TextChannel TextChannel}.</li>
*
* <li>{@link net.dv8tion.jda.core.requests.ErrorResponse#UNKNOWN_EMOJI}
* <br>The provided unicode character does not refer to a known emoji unicode character.
* <br>Proper unicode characters for emojis can be found at
* <a href="http://unicode.org/emoji/charts/full-emoji-list.html" target="_blank">http://unicode.org/emoji/charts/full-emoji-list.html</a></li>
*
* <li>{@link net.dv8tion.jda.core.requests.ErrorResponse#UNKNOWN_MESSAGE UNKNOWN_MESSAGE}
* <br>The provided {@code messageId} is unknown in this MessageChannel, either due to the id being invalid, or
* the message it referred to has already been deleted.</li>
*
* <li>{@link net.dv8tion.jda.core.requests.ErrorResponse#UNKNOWN_CHANNEL UNKNOWN_CHANNEL}
* <br>The request was attempted after the channel was deleted.</li>
* </ul>
*
* @param messageId
* The messageId to attach the reaction to
* @param unicode
* The UTF-8 characters to react with
*
* @throws java.lang.IllegalArgumentException
* <ul>
* <li>If provided {@code messageId} is {@code null} or empty.</li>
* <li>If provided {@code messageId} is {@code null} or empty.</li>
* </ul>
* @throws net.dv8tion.jda.core.exceptions.PermissionException
* If the MessageChannel this message was sent in was a {@link net.dv8tion.jda.core.entities.TextChannel TextChannel}
* and the logged in account does not have
* <ul>
* <li>{@link net.dv8tion.jda.core.Permission#MESSAGE_ADD_REACTION Permission.MESSAGE_ADD_REACTION}</li>
* <li>{@link net.dv8tion.jda.core.Permission#MESSAGE_HISTORY Permission.MESSAGE_HISTORY}</li>
* </ul>
*
* @return {@link net.dv8tion.jda.core.requests.RestAction} - Type: Void
*/
default RestAction<Void> addReactionById(String messageId, String unicode)
{
Args.notEmpty(messageId, "MessageId");
Args.notEmpty(unicode, "Provided Unicode");
Args.containsNoBlanks(unicode, "Provided Unicode");
String encoded;
try
{
encoded = URLEncoder.encode(unicode, "UTF-8");
}