# Module `onionr.communicatorutils.downloadblocks.shoulddownload`

Onionr - Private P2P Communication

Check if a block should be downloaded (if we already have it or its blacklisted or not)

Source code

    '''
        Onionr - Private P2P Communication

        Check if a block should be downloaded (if we already have it or its blacklisted or not)
    '''
    '''
        This program is free software: you can redistribute it and/or modify
        it under the terms of the GNU General Public License as published by
        the Free Software Foundation, either version 3 of the License, or
        (at your option) any later version.

        This program is distributed in the hope that it will be useful,
        but WITHOUT ANY WARRANTY; without even the implied warranty of
        MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        GNU General Public License for more details.

        You should have received a copy of the GNU General Public License
        along with this program.  If not, see <https://www.gnu.org/licenses/>.
    '''
    from coredb import blockmetadb
    from onionrblocks import onionrblacklist

    def should_download(comm_inst, block_hash):
        blacklist = onionrblacklist.OnionrBlackList()
        ret_data = True
        if block_hash in blockmetadb.get_block_list(): # Dont download block we have
            ret_data = False
        else:
            if blacklist.inBlacklist(block_hash): # Dont download blacklisted block
                ret_data = False
        if ret_data is False:
            # Remove block from communicator queue if it shouldnt be downloaded
            try:
                del comm_inst.blockQueue[block_hash]
            except KeyError:
                pass
        return ret_data

## Functions

`def should_download(comm_inst, block_hash)`
  Source code

      def should_download(comm_inst, block_hash):
          blacklist = onionrblacklist.OnionrBlackList()
          ret_data = True
          if block_hash in blockmetadb.get_block_list(): # Dont download block we have
              ret_data = False
          else:
              if blacklist.inBlacklist(block_hash): # Dont download blacklisted block
                  ret_data = False
          if ret_data is False:
              # Remove block from communicator queue if it shouldnt be downloaded
              try:
                  del comm_inst.blockQueue[block_hash]
              except KeyError:
                  pass
          return ret_data