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| 1 | +package org.togetherjava.tjbot.commands.moderation.attachment; |
| 2 | + |
| 3 | +import net.dv8tion.jda.api.EmbedBuilder; |
| 4 | +import net.dv8tion.jda.api.MessageBuilder; |
| 5 | +import net.dv8tion.jda.api.entities.Message; |
| 6 | +import net.dv8tion.jda.api.entities.MessageEmbed; |
| 7 | +import net.dv8tion.jda.api.events.message.MessageReceivedEvent; |
| 8 | +import net.dv8tion.jda.api.requests.RestAction; |
| 9 | +import org.togetherjava.tjbot.commands.MessageReceiverAdapter; |
| 10 | +import org.togetherjava.tjbot.config.Config; |
| 11 | +import org.togetherjava.tjbot.moderation.ModAuditLogWriter; |
| 12 | + |
| 13 | +import javax.annotation.Nonnull; |
| 14 | +import java.awt.*; |
| 15 | +import java.util.List; |
| 16 | +import java.util.Locale; |
| 17 | +import java.util.regex.Pattern; |
| 18 | + |
| 19 | +/** |
| 20 | + * Reacts to blacklisted attachments being posted, upon which they are deleted. |
| 21 | + */ |
| 22 | +public final class BlacklistedAttachmentListener extends MessageReceiverAdapter { |
| 23 | + private final ModAuditLogWriter modAuditLogWriter; |
| 24 | + private final List<String> blacklistedFileExtensions; |
| 25 | + |
| 26 | + /** |
| 27 | + * Creates a AttachmentListener to receive all message sent in any channel. |
| 28 | + * |
| 29 | + * @param config to find the blacklisted media attachments |
| 30 | + * @param modAuditLogWriter to inform the mods about the suspicious attachment |
| 31 | + */ |
| 32 | + public BlacklistedAttachmentListener(Config config, ModAuditLogWriter modAuditLogWriter) { |
| 33 | + super(Pattern.compile(".*")); |
| 34 | + this.modAuditLogWriter = modAuditLogWriter; |
| 35 | + this.blacklistedFileExtensions = config.getBlacklistedFileExtensions(); |
| 36 | + } |
| 37 | + |
| 38 | + @Override |
| 39 | + public void onMessageReceived(MessageReceivedEvent event) { |
| 40 | + if (event.getAuthor().isBot() || event.isWebhookMessage()) { |
| 41 | + return; |
| 42 | + } |
| 43 | + if (doesMessageContainBlacklistedContent(event.getMessage())) { |
| 44 | + handleBadMessage(event.getMessage()); |
| 45 | + } |
| 46 | + } |
| 47 | + |
| 48 | + private void handleBadMessage(Message message) { |
| 49 | + message.delete().flatMap(any -> dmUser(message)).queue(any -> warnMods(message)); |
| 50 | + } |
| 51 | + |
| 52 | + @Nonnull |
| 53 | + private RestAction<Message> dmUser(Message message) { |
| 54 | + Message dmMessage = createDmMessage(message); |
| 55 | + return message.getAuthor() |
| 56 | + .openPrivateChannel() |
| 57 | + .flatMap(privateChannel -> privateChannel.sendMessage(dmMessage)); |
| 58 | + } |
| 59 | + |
| 60 | + @Nonnull |
| 61 | + private Message createDmMessage(Message originalMessage) { |
| 62 | + String contentRaw = originalMessage.getContentRaw(); |
| 63 | + String blacklistedAttachments = |
| 64 | + String.join(", ", getBlacklistedAttachmentsFromMessage(originalMessage)); |
| 65 | + |
| 66 | + String dmMessageContent = |
| 67 | + """ |
| 68 | + Hey there, you posted a message containing a blacklisted file attachment: %s. |
| 69 | + We had to delete your message for security reasons. |
| 70 | +
|
| 71 | + Feel free to repost your message without, or with a different file instead. Sorry for any inconvenience caused by this 🙇️ |
| 72 | + """ |
| 73 | + .formatted(blacklistedAttachments); |
| 74 | + |
| 75 | + // No embed needed if there was no message from the user |
| 76 | + if (contentRaw.isEmpty()) { |
| 77 | + return new MessageBuilder(dmMessageContent).build(); |
| 78 | + } |
| 79 | + return createBaseResponse(contentRaw, dmMessageContent); |
| 80 | + } |
| 81 | + |
| 82 | + @Nonnull |
| 83 | + private Message createBaseResponse(String originalMessageContent, String dmMessageContent) { |
| 84 | + MessageEmbed originalMessageEmbed = |
| 85 | + new EmbedBuilder().setDescription(originalMessageContent) |
| 86 | + .setColor(Color.ORANGE) |
| 87 | + .build(); |
| 88 | + return new MessageBuilder(dmMessageContent).setEmbeds(originalMessageEmbed).build(); |
| 89 | + } |
| 90 | + |
| 91 | + @Nonnull |
| 92 | + private List<String> getBlacklistedAttachmentsFromMessage(Message originalMessage) { |
| 93 | + return originalMessage.getAttachments() |
| 94 | + .stream() |
| 95 | + .filter(attachment -> blacklistedFileExtensions |
| 96 | + .contains(attachment.getFileExtension().toLowerCase(Locale.US))) |
| 97 | + .map(Message.Attachment::getFileName) |
| 98 | + .toList(); |
| 99 | + } |
| 100 | + |
| 101 | + private boolean doesMessageContainBlacklistedContent(Message message) { |
| 102 | + return message.getAttachments() |
| 103 | + .stream() |
| 104 | + .anyMatch(attachment -> blacklistedFileExtensions |
| 105 | + .contains(attachment.getFileExtension().toLowerCase(Locale.US))); |
| 106 | + } |
| 107 | + |
| 108 | + private void warnMods(Message sentUserMessage) { |
| 109 | + String blacklistedAttachmentsFromMessage = |
| 110 | + String.join(", ", getBlacklistedAttachmentsFromMessage(sentUserMessage)); |
| 111 | + |
| 112 | + modAuditLogWriter.write( |
| 113 | + "Message with blacklisted content detected: %s" |
| 114 | + .formatted(blacklistedAttachmentsFromMessage), |
| 115 | + "Sent Message: %s".formatted(sentUserMessage), sentUserMessage.getAuthor(), |
| 116 | + sentUserMessage.getTimeCreated(), sentUserMessage.getGuild()); |
| 117 | + } |
| 118 | +} |
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