nmode's Git Repositories - signal-cli/blob - src/main/java/org/asamk/signal/commands/GetAttachmentCommand.java

   1 package org.asamk.signal.commands;
   2
   3 import net.sourceforge.argparse4j.inf.Namespace;
   4 import net.sourceforge.argparse4j.inf.Subparser;
   5
   6 import org.asamk.signal.commands.exceptions.CommandException;
   7 import org.asamk.signal.commands.exceptions.UnexpectedErrorException;
   8 import org.asamk.signal.commands.exceptions.UserErrorException;
   9 import org.asamk.signal.json.JsonAttachmentData;
  10 import org.asamk.signal.manager.Manager;
  11 import org.asamk.signal.output.JsonWriter;
  12 import org.asamk.signal.output.OutputWriter;
  13 import org.asamk.signal.output.PlainTextWriter;
  14
  15 import java.io.FileNotFoundException;
  16 import java.io.IOException;
  17 import java.io.InputStream;
  18 import java.util.Base64;
  19
  20 public class GetAttachmentCommand implements JsonRpcLocalCommand {
  21
  22     @Override
  23     public String getName() {
  24         return "getAttachment";
  25     }
  26
  27     @Override
  28     public void attachToSubparser(final Subparser subparser) {
  29         subparser.help("Retrieve an already downloaded attachment base64 encoded.");
  30         subparser.addArgument("--id").required(true).help("The ID of the attachment file.");
  31         var mut = subparser.addMutuallyExclusiveGroup().required(true);
  32         mut.addArgument("--recipient").help("Sender of the attachment");
  33         mut.addArgument("-g", "--group-id").help("Group in which the attachment was received");
  34     }
  35
  36     @Override
  37     public void handleCommand(
  38             final Namespace ns, final Manager m, final OutputWriter outputWriter
  39     ) throws CommandException {
  40
  41         final var id = ns.getString("id");
  42
  43         try (InputStream attachment = m.retrieveAttachment(id)) {
  44             final var bytes = attachment.readAllBytes();
  45             final var base64 = Base64.getEncoder().encodeToString(bytes);
  46             switch (outputWriter) {
  47                 case PlainTextWriter writer -> writer.println(base64);
  48                 case JsonWriter writer -> writer.write(new JsonAttachmentData(base64));
  49             }
  50         } catch (FileNotFoundException ex) {
  51             throw new UserErrorException("Could not find attachment with ID: " + id, ex);
  52         } catch (IOException ex) {
  53             throw new UnexpectedErrorException("An error occurred reading attachment: " + id, ex);
  54         }
  55     }
  56 }