#!/usr/bin/env python
########################################################################
# This is transmission-remote-cli, whereas 'cli' stands for 'Curses    #
# Luminous Interface', a client for the daemon of the BitTorrent       #
# client Transmission.                                                 #
#                                                                      #
# 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:                         #
# http://www.gnu.org/licenses/gpl-3.0.txt                              #
########################################################################
VERSION = '1.1.1'
TRNSM_VERSION_MIN = '1.90'
TRNSM_VERSION_MAX = '2.50'
RPC_VERSION_MIN = 8
RPC_VERSION_MAX = 14
# error codes
CONNECTION_ERROR = 1
JSON_ERROR       = 2
CONFIGFILE_ERROR = 3
# use simplejson if available because it seems to be faster
try:
    import simplejson as json
except ImportError:
    try:
        # Python 2.6 comes with a json module ...
        import json
        # ...but there is also an old json module that doesn't support .loads/.dumps.
        json.dumps ; json.dumps
    except (ImportError,AttributeError):
        quit("Please install simplejson or Python 2.6 or higher.")
import time
import re
import base64
import httplib
import urllib2
import socket
socket.setdefaulttimeout(None)
import ConfigParser
from optparse import OptionParser, SUPPRESS_HELP
import sys
import os
import signal
import unicodedata
import locale
locale.setlocale(locale.LC_ALL, '')
import curses
import curses.ascii
from textwrap import wrap
from subprocess import call
import netrc
# optional features provided by non-standard modules
features = {'dns':False, 'geoip':False, 'ipy':False}
try:   import adns; features['dns'] = True     # resolve IP to host name
except ImportError: features['dns'] = False
try:   import GeoIP; features['geoip'] = True  # show country peer seems to be in
except ImportError:  features['geoip'] = False
try:   import IPy;  features['ipy'] = True  # extract ipv4 from ipv6 addresses
except ImportError: features['ipy'] = False
if features['ipy']:
    IPV6_RANGE_6TO4 = IPy.IP('2002::/16')
    IPV6_RANGE_TEREDO = IPy.IP('2001::/32')
    IPV4_ONES = 0xffffffff
if features['geoip']:
    def country_code_by_addr_vany(geo_ip, geo_ip6, addr):
        if '.' in addr:
            return geo_ip.country_code_by_addr(addr)
        if not ':' in addr:
            return None
        if features['ipy']:
            ip = IPy.IP(addr)
            if ip in IPV6_RANGE_6TO4:
              addr = str(IPy.IP(ip.int() >> 80 & IPV4_ONES))
              return geo_ip.country_code_by_addr(addr)
            elif ip in IPV6_RANGE_TEREDO:
              addr = str(IPy.IP(ip.int() & IPV4_ONES ^ IPV4_ONES))
              return geo_ip.country_code_by_addr(addr)
        if hasattr(geo_ip6, 'country_code_by_addr_v6'):
            return geo_ip6.country_code_by_addr_v6(addr)
# define config defaults
config = ConfigParser.SafeConfigParser()
config.add_section('Connection')
config.set('Connection', 'password', '')
config.set('Connection', 'username', '')
config.set('Connection', 'port', '9091')
config.set('Connection', 'host', 'localhost')
config.set('Connection', 'path', '/transmission/rpc')
config.set('Connection', 'ssl', 'False')
config.add_section('Sorting')
config.set('Sorting', 'order', 'name')
config.add_section('Filtering')
config.set('Filtering', 'filter', '')
config.set('Filtering', 'invert', 'False')
config.add_section('Misc')
config.set('Misc', 'compact_list', 'False')
config.set('Misc', 'torrentname_is_progressbar', 'True')
config.add_section('Colors')
config.set('Colors', 'title_seed',       'bg:green,fg:black')
config.set('Colors', 'title_download',   'bg:blue,fg:black')
config.set('Colors', 'title_idle',       'bg:cyan,fg:black')
config.set('Colors', 'title_verify',     'bg:magenta,fg:black')
config.set('Colors', 'title_paused',     'bg:black,fg:white')
config.set('Colors', 'download_rate',    'bg:black,fg:blue')
config.set('Colors', 'upload_rate',      'bg:black,fg:red')
config.set('Colors', 'eta+ratio',        'bg:black,fg:white')
config.set('Colors', 'filter_status',    'bg:red,fg:black')
config.set('Colors', 'dialog',           'bg:black,fg:white')
config.set('Colors', 'dialog_important', 'bg:red,fg:black')
config.set('Colors', 'button',           'bg:white,fg:black')
config.set('Colors', 'button_focused',   'bg:black,fg:white')
config.set('Colors', 'file_prio_high',   'bg:red,fg:black')
config.set('Colors', 'file_prio_normal', 'bg:white,fg:black')
config.set('Colors', 'file_prio_low',    'bg:yellow,fg:black')
config.set('Colors', 'file_prio_off',    'bg:blue,fg:black')
class ColorManager:
    def __init__(self, config):
        self.config = dict()
        for name in config.keys():
            self.config[name] = self._parse_color_pair(config[name])
    def _parse_color_pair(self, pair):
        # BG and FG are intentionally switched here because colors are always
        # used with curses.A_REVERSE. (To be honest, I forgot why, probably
        # has something to do with how highlighting focus works.)
        bg_name = pair.split(',')[1].split(':')[1].upper()
        fg_name = pair.split(',')[0].split(':')[1].upper()
        return { 'id': len(self.config.keys()) + 1,
                 'bg':eval('curses.COLOR_' + bg_name),
                 'fg':eval('curses.COLOR_' + fg_name) }
    def get_id(self, name): return self.config[name]['id']
    def get_bg(self, name): return self.config[name]['bg']
    def get_fg(self, name): return self.config[name]['fg']
    def get_names(self): return self.config.keys()
authhandler = None
session_id = 0
# Handle communication with Transmission server.
class TransmissionRequest:
    def __init__(self, host, port, path, method=None, tag=None, arguments=None):
        self.url           = create_url(host, port, path)
        self.open_request  = None
        self.last_update   = 0
        if method and tag:
            self.set_request_data(method, tag, arguments)
    def set_request_data(self, method, tag, arguments=None):
        request_data = {'method':method, 'tag':tag}
        if arguments: request_data['arguments'] = arguments
        self.http_request = urllib2.Request(url=self.url, data=json.dumps(request_data))
    def send_request(self):
        """Ask for information from server OR submit command."""
        global session_id
        try:
            if session_id:
                self.http_request.add_header('X-Transmission-Session-Id', session_id)
            self.open_request = urllib2.urlopen(self.http_request)
            debug(self.http_request.get_data() + "\n\n")
        except AttributeError:
            # request data (http_request) isn't specified yet -- data will be available on next call
            pass
        # authentication
        except urllib2.HTTPError, e:
            try:
                msg = html2text(str(e.read()))
            except:
                msg = str(e)
            # extract session id and send request again
            m = re.search('X-Transmission-Session-Id:\s*(\w+)', msg)
            try:
                session_id = m.group(1)
                self.send_request()
            except AttributeError:
                quit(str(msg) + "\n", CONNECTION_ERROR)
        except urllib2.URLError, msg:
            try:
                reason = msg.reason[1]
            except IndexError:
                reason = str(msg.reason)
            quit("Cannot connect to %s: %s\n" % (self.http_request.host, reason), CONNECTION_ERROR)
    def get_response(self):
        """Get response to previously sent request."""
        if self.open_request == None:
            return {'result': 'no open request'}
        response = self.open_request.read()
        # work around regression in Python 2.6.5, caused by http://bugs.python.org/issue8797
        if authhandler:
            authhandler.retried = 0
        try:
            data = json.loads(unicode(response))
            debug(data)
        except ValueError:
            quit("Cannot parse response: %s\n" % response, JSON_ERROR)
        self.open_request = None
        return data
# End of Class TransmissionRequest
# Higher level of data exchange
class Transmission:
    STATUS_STOPPED       = 0   # Torrent is stopped
    STATUS_CHECK_WAIT    = 1   # Queued to check files
    STATUS_CHECK         = 2   # Checking files
    STATUS_DOWNLOAD_WAIT = 3   # Queued to download
    STATUS_DOWNLOAD      = 4   # Downloading
    STATUS_SEED_WAIT     = 5   # Queued to seed
    STATUS_SEED          = 6   # Seeding
    TAG_TORRENT_LIST    = 7
    TAG_TORRENT_DETAILS = 77
    TAG_SESSION_STATS   = 21
    TAG_SESSION_GET     = 22
    LIST_FIELDS = [ 'id', 'name', 'downloadDir', 'status', 'trackerStats', 'desiredAvailable',
                    'rateDownload', 'rateUpload', 'eta', 'uploadRatio',
                    'sizeWhenDone', 'haveValid', 'haveUnchecked', 'addedDate',
                    'uploadedEver', 'errorString', 'recheckProgress',
                    'peersConnected', 'uploadLimit', 'downloadLimit',
                    'uploadLimited', 'downloadLimited', 'bandwidthPriority',
                    'peersSendingToUs', 'peersGettingFromUs',
                    'seedRatioLimit', 'seedRatioMode' ]
    DETAIL_FIELDS = [ 'files', 'priorities', 'wanted', 'peers', 'trackers',
                      'activityDate', 'dateCreated', 'startDate', 'doneDate',
                      'totalSize', 'leftUntilDone', 'comment', 'isPrivate',
                      'hashString', 'pieceCount', 'pieceSize', 'pieces',
                      'downloadedEver', 'corruptEver', 'peersFrom' ] + LIST_FIELDS
    def __init__(self, host, port, path, username, password):
        self.host = host
        self.port = port
        self.path = path
        if username and password:
            password_mgr = urllib2.HTTPPasswordMgrWithDefaultRealm()
            password_mgr.add_password(None, create_url(host, port, path), username, password)
            global authhandler
            authhandler = urllib2.HTTPBasicAuthHandler(password_mgr)
            opener = urllib2.build_opener(authhandler)
            urllib2.install_opener(opener)
        # check rpc version
        request = TransmissionRequest(host, port, path, 'session-get', self.TAG_SESSION_GET)
        request.send_request()
        response = request.get_response()
        self.rpc_version = response['arguments']['rpc-version']
        # rpc version too old?
        version_error = "Unsupported Transmission version: " + str(response['arguments']['version']) + \
            " -- RPC protocol version: " + str(response['arguments']['rpc-version']) + "\n"
        min_msg = "Please install Transmission version " + TRNSM_VERSION_MIN + " or higher.\n"
        try:
            if response['arguments']['rpc-version'] < RPC_VERSION_MIN:
                quit(version_error + min_msg)
        except KeyError:
            quit(version_error + min_msg)
        # rpc version too new?
        if response['arguments']['rpc-version'] > RPC_VERSION_MAX:
            quit(version_error + "Please install Transmission version " + TRNSM_VERSION_MAX + " or lower.\n")
        # setup compatibility to Transmission <2.40
        if self.rpc_version < 14:
            Transmission.STATUS_CHECK_WAIT    = 1 << 0
            Transmission.STATUS_CHECK         = 1 << 1
            Transmission.STATUS_DOWNLOAD_WAIT = 1 << 2
            Transmission.STATUS_DOWNLOAD      = 1 << 2
            Transmission.STATUS_SEED_WAIT     = 1 << 3
            Transmission.STATUS_SEED          = 1 << 3
            Transmission.STATUS_STOPPED       = 1 << 4
        # set up request list
        self.requests = {'torrent-list':
                             TransmissionRequest(host, port, path, 'torrent-get', self.TAG_TORRENT_LIST, {'fields': self.LIST_FIELDS}),
                         'session-stats':
                             TransmissionRequest(host, port, path, 'session-stats', self.TAG_SESSION_STATS, 21),
                         'session-get':
                             TransmissionRequest(host, port, path, 'session-get', self.TAG_SESSION_GET),
                         'torrent-details':
                             TransmissionRequest(host, port, path)}
        self.torrent_cache = []
        self.status_cache  = dict()
        self.torrent_details_cache = dict()
        self.peer_progress_cache   = dict()
        self.hosts_cache   = dict()
        self.geo_ips_cache = dict()
        if features['dns']:   self.resolver = adns.init()
        if features['geoip']:
            self.geo_ip = GeoIP.new(GeoIP.GEOIP_MEMORY_CACHE)
            try:
                self.geo_ip6 = GeoIP.open_type(GeoIP.GEOIP_COUNTRY_EDITION_V6, GeoIP.GEOIP_MEMORY_CACHE);
            except AttributeError: self.geo_ip6 = None
            except GeoIP.error: self.geo_ip6 = None
        # make sure there are no undefined values
        self.wait_for_torrentlist_update()
        self.requests['torrent-details'] = TransmissionRequest(self.host, self.port, self.path)
    def update(self, delay, tag_waiting_for=0):
        """Maintain up-to-date data."""
        tag_waiting_for_occurred = False
        for request in self.requests.values():
            if time.time() - request.last_update >= delay:
                request.last_update = time.time()
                response = request.get_response()
                if response['result'] == 'no open request':
                    request.send_request()
                elif response['result'] == 'success':
                    tag = self.parse_response(response)
                    if tag == tag_waiting_for:
                        tag_waiting_for_occurred = True
        if tag_waiting_for:
            return tag_waiting_for_occurred
        else:
            return None
    def parse_response(self, response):
        # response is a reply to torrent-get
        if response['tag'] == self.TAG_TORRENT_LIST or response['tag'] == self.TAG_TORRENT_DETAILS:
            for t in response['arguments']['torrents']:
                t['uploadRatio'] = round(float(t['uploadRatio']), 2)
                t['percentDone'] = percent(float(t['sizeWhenDone']),
                                           float(t['haveValid'] + t['haveUnchecked']))
                t['available'] = t['desiredAvailable'] + t['haveValid'] + t['haveUnchecked']
                if t['downloadDir'][-1] != '/':
                    t['downloadDir'] += '/'
                try:
                    t['seeders']  = max(map(lambda x: x['seederCount'],  t['trackerStats']))
                    t['leechers'] = max(map(lambda x: x['leecherCount'], t['trackerStats']))
                except ValueError:
                    t['seeders']  = t['leechers'] = -1
            if response['tag'] == self.TAG_TORRENT_LIST:
                self.torrent_cache = response['arguments']['torrents']
            elif response['tag'] == self.TAG_TORRENT_DETAILS:
                # torrent list may be empty sometimes after deleting
                # torrents.  no idea why and why the server sends us
                # TAG_TORRENT_DETAILS, but just passing seems to help.(?)
                try:
                    torrent_details = response['arguments']['torrents'][0]
                    torrent_details['pieces'] = base64.decodestring(torrent_details['pieces'])
                    self.torrent_details_cache = torrent_details
                    self.upgrade_peerlist()
                except IndexError:
                    pass
        elif response['tag'] == self.TAG_SESSION_STATS:
            self.status_cache.update(response['arguments'])
        elif response['tag'] == self.TAG_SESSION_GET:
            self.status_cache.update(response['arguments'])
        return response['tag']
    def upgrade_peerlist(self):
        for index,peer in enumerate(self.torrent_details_cache['peers']):
            ip = peer['address']
            peerid = ip + self.torrent_details_cache['hashString']
            # make sure peer cache exists
            if not self.peer_progress_cache.has_key(peerid):
                self.peer_progress_cache[peerid] = {'last_progress':peer['progress'], 'last_update':time.time(),
                                                    'download_speed':0, 'time_left':0}
            # estimate how fast a peer is downloading
            if peer['progress'] < 1:
                this_time = time.time()
                time_diff = this_time - self.peer_progress_cache[peerid]['last_update']
                progress_diff = peer['progress'] - self.peer_progress_cache[peerid]['last_progress']
                if self.peer_progress_cache[peerid]['last_progress'] and progress_diff > 0 and time_diff > 5:
                    downloaded = self.torrent_details_cache['totalSize'] * progress_diff
                    avg_speed  = downloaded / time_diff
                    if self.peer_progress_cache[peerid]['download_speed'] > 0:  # make it less jumpy
                        avg_speed = (self.peer_progress_cache[peerid]['download_speed'] + avg_speed) /2
                    download_left = self.torrent_details_cache['totalSize'] - \
                        (self.torrent_details_cache['totalSize']*peer['progress'])
                    time_left  = download_left / avg_speed
                    self.peer_progress_cache[peerid]['last_update']    = this_time  # remember update time
                    self.peer_progress_cache[peerid]['download_speed'] = avg_speed
                    self.peer_progress_cache[peerid]['time_left']      = time_left
                self.peer_progress_cache[peerid]['last_progress'] = peer['progress']  # remember progress
            self.torrent_details_cache['peers'][index].update(self.peer_progress_cache[peerid])
            # resolve and locate peer's ip
            if features['dns'] and not self.hosts_cache.has_key(ip):
                try:
                    self.hosts_cache[ip] = self.resolver.submit_reverse(ip, adns.rr.PTR)
                except adns.Error:
                    pass
            if features['geoip'] and not self.geo_ips_cache.has_key(ip):
                self.geo_ips_cache[ip] = country_code_by_addr_vany(self.geo_ip, self.geo_ip6, ip)
                if self.geo_ips_cache[ip] == None:
                    self.geo_ips_cache[ip] = '?'
    def get_rpc_version(self):
        return self.rpc_version
    def get_global_stats(self):
        return self.status_cache
    def get_torrent_list(self, sort_orders):
        try:
            for sort_order in sort_orders:
                if isinstance(self.torrent_cache[0][sort_order['name']], (str, unicode)):
                    self.torrent_cache.sort(key=lambda x: x[sort_order['name']].lower(),
                                            reverse=sort_order['reverse'])
                else:
                    self.torrent_cache.sort(key=lambda x: x[sort_order['name']],
                                            reverse=sort_order['reverse'])
        except IndexError:
            return []
        return self.torrent_cache
    def get_torrent_by_id(self, id):
        i = 0
        while self.torrent_cache[i]['id'] != id:  i += 1
        if self.torrent_cache[i]['id'] == id:
            return self.torrent_cache[i]
        else:
            return None
    def get_torrent_details(self):
        return self.torrent_details_cache
    def set_torrent_details_id(self, id):
        if id < 0:
            self.requests['torrent-details'] = TransmissionRequest(self.host, self.port, self.path)
        else:
            self.requests['torrent-details'].set_request_data('torrent-get', self.TAG_TORRENT_DETAILS,
                                                              {'ids':id, 'fields': self.DETAIL_FIELDS})
    def get_hosts(self):
        return self.hosts_cache
    def get_geo_ips(self):
        return self.geo_ips_cache
    def set_option(self, option_name, option_value):
        request = TransmissionRequest(self.host, self.port, self.path, 'session-set', 1, {option_name: option_value})
        request.send_request()
        self.wait_for_status_update()
    def set_rate_limit(self, direction, new_limit, torrent_id=-1):
        data = dict()
        if new_limit <= -1:
            new_limit     = None
            limit_enabled = False
        else:
            limit_enabled = True
        if torrent_id < 0:
            type = 'session-set'
            data['speed-limit-'+direction]            = new_limit
            data['speed-limit-'+direction+'-enabled'] = limit_enabled
        else:
            type = 'torrent-set'
            data['ids'] = [torrent_id]
            data[direction+'loadLimit']   = new_limit
            data[direction+'loadLimited'] = limit_enabled
        request = TransmissionRequest(self.host, self.port, self.path, type, 1, data)
        request.send_request()
        self.wait_for_torrentlist_update()
    def set_seed_ratio(self, ratio, torrent_id=-1):
        data = dict()
        if ratio == -1:
            ratio = None
            mode  = 0   # Use global settings
        elif ratio == 0:
            ratio = None
            mode  = 2   # Seed regardless of ratio
        elif ratio >= 0:
            mode  = 1   # Stop seeding at seedRatioLimit
        else:
            return
        data['ids']            = [torrent_id]
        data['seedRatioLimit'] = ratio
        data['seedRatioMode']  = mode
        request = TransmissionRequest(self.host, self.port, self.path, 'torrent-set', 1, data)
        request.send_request()
        self.wait_for_torrentlist_update()
    def increase_bandwidth_priority(self, torrent_id):
        torrent = self.get_torrent_by_id(torrent_id)
        if torrent == None or torrent['bandwidthPriority'] >= 1:
            return False
        else:
            new_priority = torrent['bandwidthPriority'] + 1
            request = TransmissionRequest(self.host, self.port, self.path, 'torrent-set', 1,
                                          {'ids': [torrent_id], 'bandwidthPriority':new_priority})
            request.send_request()
            self.wait_for_torrentlist_update()
    def decrease_bandwidth_priority(self, torrent_id):
        torrent = self.get_torrent_by_id(torrent_id)
        if torrent == None or torrent['bandwidthPriority'] <= -1:
            return False
        else:
            new_priority = torrent['bandwidthPriority'] - 1
            request = TransmissionRequest(self.host, self.port, self.path, 'torrent-set', 1,
                                          {'ids': [torrent_id], 'bandwidthPriority':new_priority})
            request.send_request()
            self.wait_for_torrentlist_update()
    def toggle_turtle_mode(self):
        self.set_option('alt-speed-enabled', not self.status_cache['alt-speed-enabled'])
    def add_torrent(self, location):
        request = TransmissionRequest(self.host, self.port, self.path, 'torrent-add', 1, {'filename': location})
        request.send_request()
        response = request.get_response()
        if response['result'] != 'success':
            return response['result']
        else:
            return ''
    def stop_torrent(self, id):
        request = TransmissionRequest(self.host, self.port, self.path, 'torrent-stop', 1, {'ids': [id]})
        request.send_request()
        self.wait_for_torrentlist_update()
    def start_torrent(self, id):
        request = TransmissionRequest(self.host, self.port, self.path, 'torrent-start', 1, {'ids': [id]})
        request.send_request()
        self.wait_for_torrentlist_update()
    def verify_torrent(self, id):
        request = TransmissionRequest(self.host, self.port, self.path, 'torrent-verify', 1, {'ids': [id]})
        request.send_request()
        self.wait_for_torrentlist_update()
    def reannounce_torrent(self, id):
        request = TransmissionRequest(self.host, self.port, self.path, 'torrent-reannounce', 1, {'ids': [id]})
        request.send_request()
        self.wait_for_torrentlist_update()
    def move_torrent(self, torrent_id, new_location):
        request = TransmissionRequest(self.host, self.port, self.path, 'torrent-set-location', 1,
                                      {'ids': torrent_id, 'location': new_location, 'move': True})
        request.send_request()
        self.wait_for_torrentlist_update()
    def remove_torrent(self, id):
        request = TransmissionRequest(self.host, self.port, self.path, 'torrent-remove', 1, {'ids': [id]})
        request.send_request()
        self.wait_for_torrentlist_update()
    def remove_torrent_local_data(self, id):
        request = TransmissionRequest(self.host, self.port, self.path, 'torrent-remove', 1, {'ids': [id], 'delete-local-data':True})
        request.send_request()
        self.wait_for_torrentlist_update()
    def add_torrent_tracker(self, id, tracker):
        data = { 'ids' : [id],
                 'trackerAdd' : [tracker] }
        request = TransmissionRequest(self.host, self.port, self.path, 'torrent-set', 1, data)
        request.send_request()
        response = request.get_response()
        return response['result'] if response['result'] != 'success' else ''
    def remove_torrent_tracker(self, id, tracker):
        data = { 'ids' : [id],
                 'trackerRemove' : [tracker] }
        request = TransmissionRequest(self.host, self.port, self.path, 'torrent-set', 1, data)
        request.send_request()
        response = request.get_response()
        self.wait_for_torrentlist_update()
        return response['result'] if response['result'] != 'success' else ''
    def increase_file_priority(self, file_nums):
        file_nums = list(file_nums)
        ref_num = file_nums[0]
        for num in file_nums:
            if not self.torrent_details_cache['wanted'][num]:
                ref_num = num
                break
            elif self.torrent_details_cache['priorities'][num] < \
                    self.torrent_details_cache['priorities'][ref_num]:
                ref_num = num
        current_priority = self.torrent_details_cache['priorities'][ref_num]
        if not self.torrent_details_cache['wanted'][ref_num]:
            self.set_file_priority(self.torrent_details_cache['id'], file_nums, 'low')
        elif current_priority == -1:
            self.set_file_priority(self.torrent_details_cache['id'], file_nums, 'normal')
        elif current_priority == 0:
            self.set_file_priority(self.torrent_details_cache['id'], file_nums, 'high')
    def decrease_file_priority(self, file_nums):
        file_nums = list(file_nums)
        ref_num = file_nums[0]
        for num in file_nums:
            if self.torrent_details_cache['priorities'][num] > \
                    self.torrent_details_cache['priorities'][ref_num]:
                ref_num = num
        current_priority = self.torrent_details_cache['priorities'][ref_num]
        if current_priority >= 1:
            self.set_file_priority(self.torrent_details_cache['id'], file_nums, 'normal')
        elif current_priority == 0:
            self.set_file_priority(self.torrent_details_cache['id'], file_nums, 'low')
        elif current_priority == -1:
            self.set_file_priority(self.torrent_details_cache['id'], file_nums, 'off')
    def set_file_priority(self, torrent_id, file_nums, priority):
        request_data = {'ids': [torrent_id]}
        if priority == 'off':
            request_data['files-unwanted'] = file_nums
        else:
            request_data['files-wanted'] = file_nums
            request_data['priority-' + priority] = file_nums
        request = TransmissionRequest(self.host, self.port, self.path, 'torrent-set', 1, request_data)
        request.send_request()
        self.wait_for_details_update()
    def get_file_priority(self, torrent_id, file_num):
        priority = self.torrent_details_cache['priorities'][file_num]
        if not self.torrent_details_cache['wanted'][file_num]: return 'off'
        elif priority <= -1: return 'low'
        elif priority == 0:  return 'normal'
        elif priority >= 1:  return 'high'
        return '?'
    def wait_for_torrentlist_update(self):
        self.wait_for_update(7)
    def wait_for_details_update(self):
        self.wait_for_update(77)
    def wait_for_status_update(self):
        self.wait_for_update(22)
    def wait_for_update(self, update_id):
        self.update(0) # send request
        while True:    # wait for response
            if self.update(0, update_id): break
            time.sleep(0.1)
    def get_status(self, torrent):
        if torrent['status'] == Transmission.STATUS_STOPPED:
            status = 'paused'
        elif torrent['status'] == Transmission.STATUS_CHECK:
            status = 'verifying'
        elif torrent['status'] == Transmission.STATUS_CHECK_WAIT:
            status = 'will verify'
        elif torrent['status'] == Transmission.STATUS_DOWNLOAD:
            status = ('idle','downloading')[torrent['rateDownload'] > 0]
        elif torrent['status'] == Transmission.STATUS_DOWNLOAD_WAIT:
            status = 'will download'
        elif torrent['status'] == Transmission.STATUS_SEED:
            status = 'seeding'
        elif torrent['status'] == Transmission.STATUS_SEED_WAIT:
            status = 'will seed'
        else:
            status = 'unknown state'
        return status
    def get_bandwidth_priority(self, torrent):
        if torrent['bandwidthPriority'] == -1:
            return '-'
        elif torrent['bandwidthPriority'] == 0:
            return ' '
        elif torrent['bandwidthPriority'] == 1:
            return '+'
        else:
            return '?'
# End of Class Transmission
# User Interface
class Interface:
    TRACKER_ITEM_HEIGHT = 6
    def __init__(self):
        self.filter_list    = config.get('Filtering', 'filter')
        self.filter_inverse = config.getboolean('Filtering', 'invert')
        self.sort_orders    = parse_sort_str(config.get('Sorting', 'order'))
        self.compact_list   = config.getboolean('Misc', 'compact_list')
        self.torrentname_is_progressbar = config.getboolean('Misc', 'torrentname_is_progressbar')
        self.torrents         = server.get_torrent_list(self.sort_orders)
        self.stats            = server.get_global_stats()
        self.torrent_details  = []
        self.selected_torrent = -1  # changes to >-1 when focus >-1 & user hits return
        self.all_paused       = False
        self.highlight_dialog = False
        self.search_focus = 0   # like self.focus but for searches in torrent list
        self.focused_id   = -1  # the id (provided by Transmission) of self.torrents[self.focus]
        self.focus        = -1  # -1: nothing focused; 0: top of list; <# of torrents>-1: bottom of list
        self.scrollpos    = 0   # start of torrentlist
        self.torrents_per_page  = 0 # will be set by manage_layout()
        self.rateDownload_width = self.rateUpload_width = 2
        self.details_category_focus = 0  # overview/files/peers/tracker in details
        self.focus_detaillist       = -1 # same as focus but for details
        self.selected_files         = [] # marked files in details
        self.scrollpos_detaillist   = 0  # same as scrollpos but for details
        self.compact_torrentlist    = False # draw only one line for each torrent in compact mode
        self.exit_now               = False
        self.keybindings = {
            ord('?'):               self.call_list_key_bindings,
            curses.KEY_F1:          self.call_list_key_bindings,
            27:                     self.go_back_or_unfocus,
            curses.KEY_BREAK:       self.go_back_or_unfocus,
            12:                     self.go_back_or_unfocus,
            curses.KEY_BACKSPACE:   self.leave_details,
            ord('q'):               self.go_back_or_quit,
            ord('o'):               self.o_key,
            ord('\n'):              self.select_torrent_detail_view,
            curses.KEY_RIGHT:       self.right_key,
            ord('l'):               self.l_key,
            ord('s'):               self.show_sort_order_menu,
            ord('f'):               self.f_key,
            ord('u'):               self.global_upload,
            ord('d'):               self.global_download,
            ord('U'):               self.torrent_upload,
            ord('D'):               self.torrent_download,
            ord('L'):               self.seed_ratio,
            ord('t'):               self.t_key,
            ord('+'):               self.bandwidth_priority,
            ord('-'):               self.bandwidth_priority,
            ord('p'):               self.pause_unpause_torrent,
            ord('P'):               self.pause_unpause_all_torrent,
            ord('v'):               self.verify_torrent,
            ord('y'):               self.verify_torrent,
            ord('r'):               self.r_key,
            curses.KEY_DC:          self.r_key,
            ord('R'):               self.remove_torrent_local_data,
            curses.KEY_SDC:         self.remove_torrent_local_data,
            curses.KEY_UP:          self.movement_keys,
            ord('k'):               self.movement_keys,
            curses.KEY_DOWN:        self.movement_keys,
            ord('j'):               self.movement_keys,
            curses.KEY_PPAGE:       self.movement_keys,
            curses.KEY_NPAGE:       self.movement_keys,
            curses.KEY_HOME:        self.movement_keys,
            curses.KEY_END:         self.movement_keys,
            ord('g'):               self.movement_keys,
            ord('G'):               self.movement_keys,
            curses.ascii.ctrl(ord('f')): self.movement_keys,
            curses.ascii.ctrl(ord('b')): self.movement_keys,
            curses.ascii.ctrl(ord('n')): self.movement_keys,
            curses.ascii.ctrl(ord('p')): self.movement_keys,
            ord("\t"):              self.move_in_details,
            curses.KEY_BTAB:        self.move_in_details,
            ord('e'):               self.move_in_details,
            ord('c'):               self.move_in_details,
            ord('C'):               self.toggle_compact_torrentlist,
            ord('h'):               self.file_pritority_or_switch_details,
            curses.KEY_LEFT:        self.file_pritority_or_switch_details,
            ord(' '):               self.space_key,
            ord('a'):               self.a_key,
            ord('m'):               self.move_torrent,
            ord('n'):               self.reannounce_torrent,
            ord('/'):               self.dialog_search_torrentlist
        }
        self.sort_options = [
            ('name','_Name'), ('addedDate','_Age'), ('percentDone','_Progress'),
            ('seeders','_Seeds'), ('leechers','Lee_ches'), ('sizeWhenDone', 'Si_ze'),
            ('status','S_tatus'), ('uploadedEver','Up_loaded'),
            ('rateUpload','_Upload Speed'), ('rateDownload','_Download Speed'),
            ('uploadRatio','_Ratio'), ('peersConnected','P_eers'),
            ('downloadDir', 'L_ocation'), ('reverse','Re_verse')
        ]
        try:
            self.init_screen()
            self.run()
        except:
            self.restore_screen()
            (exc_type, exc_value, exc_traceback) = sys.exc_info()
            raise exc_type, exc_value, exc_traceback
        else:
            self.restore_screen()
    def init_screen(self):
        os.environ['ESCDELAY'] = '0' # make escape usable
        self.screen = curses.initscr()
        curses.noecho() ; curses.cbreak() ; self.screen.keypad(1)
        curses.halfdelay(10) # STDIN timeout
        hide_cursor()
        # enable colors if available
        try:
            curses.start_color()
            self.colors = ColorManager(dict(config.items('Colors')))
            for name in sorted(self.colors.get_names()):
                curses.init_pair(self.colors.get_id(name),
                                 self.colors.get_fg(name),
                                 self.colors.get_bg(name))
        except:
            pass
        # http://bugs.python.org/issue2675
        try:
            del os.environ['LINES']
            del os.environ['COLUMNS']
        except:
            pass
        # http://bugs.python.org/issue2675
        try:
            del os.environ['LINES']
            del os.environ['COLUMNS']
        except:
            pass
        signal.signal(signal.SIGWINCH, lambda y,frame: self.get_screen_size())
        self.get_screen_size()
    def restore_screen(self):
        curses.endwin()
    def get_screen_size(self):
        time.sleep(0.1) # prevents curses.error on rapid resizing
        while True:
            curses.endwin()
            self.screen.refresh()
            self.height, self.width = self.screen.getmaxyx()
            # Tracker list breaks if width smaller than 73
            if self.width < 73 or self.height < 16:
                self.screen.erase()
                self.screen.addstr(0,0, "Terminal too small", curses.A_REVERSE + curses.A_BOLD)
                time.sleep(1)
            else:
                break
        self.manage_layout()
    def manage_layout(self):
        self.tlist_item_height = 3 if not self.compact_list else 1
        self.pad_height = max((len(self.torrents)+1) * self.tlist_item_height, self.height)
        self.pad = curses.newpad(self.pad_height, self.width)
        self.mainview_height = self.height - 2
        self.torrents_per_page = self.mainview_height / self.tlist_item_height
        self.detaillistitems_per_page = self.height - 8
        if self.selected_torrent > -1:
            self.rateDownload_width = self.get_rateDownload_width([self.torrent_details])
            self.rateUpload_width   = self.get_rateUpload_width([self.torrent_details])
            self.torrent_title_width = self.width - self.rateUpload_width - 2
            # show downloading column only if torrents is downloading
            if self.torrent_details['status'] == Transmission.STATUS_DOWNLOAD:
                self.torrent_title_width -= self.rateDownload_width + 2
        elif self.torrents:
            visible_torrents = self.torrents[self.scrollpos/self.tlist_item_height : self.scrollpos/self.tlist_item_height + self.torrents_per_page + 1]
            self.rateDownload_width = self.get_rateDownload_width(visible_torrents)
            self.rateUpload_width   = self.get_rateUpload_width(visible_torrents)
            self.torrent_title_width = self.width - self.rateUpload_width - 2
            # show downloading column only if any downloading torrents are visible
            if filter(lambda x: x['status']==Transmission.STATUS_DOWNLOAD, visible_torrents):
                self.torrent_title_width -= self.rateDownload_width + 2
        else:
            self.torrent_title_width = 80
    def get_rateDownload_width(self, torrents):
        new_width = max(map(lambda x: len(scale_bytes(x['rateDownload'])), torrents))
        new_width = max(max(map(lambda x: len(scale_time(x['eta'])), torrents)), new_width)
        new_width = max(len(scale_bytes(self.stats['downloadSpeed'])), new_width)
        new_width = max(self.rateDownload_width, new_width) # don't shrink
        return new_width
    def get_rateUpload_width(self, torrents):
        new_width = max(map(lambda x: len(scale_bytes(x['rateUpload'])), torrents))
        new_width = max(max(map(lambda x: len(num2str(x['uploadRatio'], '%.02f')), torrents)), new_width)
        new_width = max(len(scale_bytes(self.stats['uploadSpeed'])), new_width)
        new_width = max(self.rateUpload_width, new_width) # don't shrink
        return new_width
    def run(self):
        self.draw_title_bar()
        self.draw_stats()
        self.draw_torrent_list()
        while True:
            server.update(1)
            # display torrentlist
            if self.selected_torrent == -1:
                self.draw_torrent_list()
            # display some torrent's details
            else:
                self.draw_details()
            self.stats = server.get_global_stats()
            self.draw_title_bar()  # show shortcuts and stuff
            self.draw_stats()      # show global states
            self.screen.move(0,0)  # in case cursor can't be invisible
            self.handle_user_input()
            if self.exit_now:
                sort_str = ','.join(map(lambda x: ('','reverse:')[x['reverse']] + x['name'], self.sort_orders))
                config.set('Sorting', 'order',   sort_str)
                config.set('Filtering', 'filter', self.filter_list)
                config.set('Filtering', 'invert', str(self.filter_inverse))
                config.set('Misc', 'compact_list', str(self.compact_list))
                config.set('Misc', 'torrentname_is_progressbar', str(self.torrentname_is_progressbar))
                save_config(cmd_args.configfile)
                return
    def go_back_or_unfocus(self, c):
        if self.focus_detaillist > -1:   # unfocus and deselect file
            self.focus_detaillist     = -1
            self.scrollpos_detaillist = 0
            self.selected_files       = []
        elif self.selected_torrent > -1: # return from details
            self.details_category_focus = 0
            self.selected_torrent = -1
            self.selected_files   = []
        else:
            if self.focus > -1:
                self.scrollpos = 0    # unfocus main list
                self.focus     = -1
            elif self.filter_list:
                self.filter_list = '' # reset filter
    def leave_details(self, c):
        if self.selected_torrent > -1:
            server.set_torrent_details_id(-1)
            self.selected_torrent       = -1
            self.details_category_focus = 0
            self.scrollpos_detaillist   = 0
            self.selected_files         = []
    def go_back_or_quit(self, c):
        if self.selected_torrent == -1:
            self.exit_now = True
        else: # return to list view
            server.set_torrent_details_id(-1)
            self.selected_torrent       = -1
            self.details_category_focus = 0
            self.focus_detaillist       = -1
            self.scrollpos_detaillist   = 0
            self.selected_files         = []
    def space_key(self, c):
        # File list
        if self.selected_torrent > -1 and self.details_category_focus == 1:
            self.select_unselect_file(c)
        # Torrent list
        elif self.selected_torrent == -1:
            self.select_torrent_detail_view(c)
    def a_key(self, c):
        # File list
        if self.selected_torrent > -1 and self.details_category_focus == 1:
            self.select_unselect_file(c)
        # Trackers
        elif self.selected_torrent > -1 and self.details_category_focus == 3:
            self.add_tracker()
        # Do nothing in other detail tabs
        elif self.selected_torrent > -1:
            pass
        else:
            self.add_torrent()
    def o_key(self, c):
        if self.selected_torrent == -1:
            self.draw_options_dialog()
        elif self.selected_torrent > -1:
            self.details_category_focus = 0
    def l_key(self, c):
        if self.focus > -1 and self.selected_torrent == -1:
            self.select_torrent_detail_view(c)
        elif self.selected_torrent > -1:
            self.file_pritority_or_switch_details(c)
    def t_key(self, c):
        if self.selected_torrent == -1:
            server.toggle_turtle_mode()
        elif self.selected_torrent > -1:
            self.details_category_focus = 3
    def f_key(self, c):
        if self.selected_torrent == -1:
            self.show_state_filter_menu(c)
        elif self.selected_torrent > -1:
            self.details_category_focus = 1
    def r_key(self, c):
        # Torrent list
        if self.selected_torrent == -1:
            self.remove_torrent(c)
        # Trackers
        elif self.selected_torrent > -1 and self.details_category_focus == 3:
            self.remove_tracker()
    def right_key(self, c):
        if self.focus > -1 and self.selected_torrent == -1:
            self.select_torrent_detail_view(c)
        else:
            self.file_pritority_or_switch_details(c)
    def add_torrent(self):
        location = self.dialog_input_text("Add torrent from file or URL", os.getcwd())
        if location:
            error = server.add_torrent(location)
            if error:
                msg = wrap("Couldn't add torrent \"%s\":" % location)
                msg.extend(wrap(error, self.width-4))
                self.dialog_ok("\n".join(msg))
    def select_torrent_detail_view(self, c):
        if self.focus > -1 and self.selected_torrent == -1:
            self.screen.clear()
            self.selected_torrent = self.focus
            server.set_torrent_details_id(self.torrents[self.focus]['id'])
            server.wait_for_details_update()
    def show_sort_order_menu(self, c):
        if self.selected_torrent == -1:
           choice = self.dialog_menu('Sort order', self.sort_options,
                                     map(lambda x: x[0]==self.sort_orders[-1]['name'], self.sort_options).index(True)+1)
           if choice != -128:
               if choice == 'reverse':
                   self.sort_orders[-1]['reverse'] = not self.sort_orders[-1]['reverse']
               else:
                   self.sort_orders.append({'name':choice, 'reverse':False})
                   while len(self.sort_orders) > 2:
                       self.sort_orders.pop(0)
    def show_state_filter_menu(self, c):
        if self.selected_torrent == -1:
            options = [('uploading','_Uploading'), ('downloading','_Downloading'),
                       ('active','Ac_tive'), ('paused','_Paused'), ('seeding','_Seeding'),
                       ('incomplete','In_complete'), ('verifying','Verif_ying'),
                       ('invert','In_vert'), ('','_All')]
            choice = self.dialog_menu(('Show only','Filter all')[self.filter_inverse], options,
                                      map(lambda x: x[0]==self.filter_list, options).index(True)+1)
            if choice != -128:
                if choice == 'invert':
                    self.filter_inverse = not self.filter_inverse
                else:
                    if choice == '':
                        self.filter_inverse = False
                    self.filter_list = choice
    def global_upload(self, c):
       current_limit = (-1,self.stats['speed-limit-up'])[self.stats['speed-limit-up-enabled']]
       limit = self.dialog_input_number("Global upload limit in kilobytes per second", current_limit)
       if limit == -128:
           return 
       server.set_rate_limit('up', limit)
    def global_download(self, c):
       current_limit = (-1,self.stats['speed-limit-down'])[self.stats['speed-limit-down-enabled']]
       limit = self.dialog_input_number("Global download limit in kilobytes per second", current_limit)
       if limit == -128:
           return 
       server.set_rate_limit('down', limit)
    def torrent_upload(self, c):
        if self.focus > -1:
            current_limit = (-1,self.torrents[self.focus]['uploadLimit'])[self.torrents[self.focus]['uploadLimited']]
            limit = self.dialog_input_number("Upload limit in kilobytes per second for\n%s" % \
                                                 self.torrents[self.focus]['name'], current_limit)
            if limit == -128:
                return 
            server.set_rate_limit('up', limit, self.torrents[self.focus]['id'])
    def torrent_download(self, c):
        if self.focus > -1:
            current_limit = (-1,self.torrents[self.focus]['downloadLimit'])[self.torrents[self.focus]['downloadLimited']]
            limit = self.dialog_input_number("Download limit in Kilobytes per second for\n%s" % \
                                                 self.torrents[self.focus]['name'], current_limit)
            if limit == -128:
                return 
            server.set_rate_limit('down', limit, self.torrents[self.focus]['id'])
    def seed_ratio(self, c):
        if self.focus > -1:
            if self.torrents[self.focus]['seedRatioMode'] == 0:   # Use global settings
                current_limit = ''
            elif self.torrents[self.focus]['seedRatioMode'] == 1: # Stop seeding at seedRatioLimit
                current_limit = self.torrents[self.focus]['seedRatioLimit']
            elif self.torrents[self.focus]['seedRatioMode'] == 2: # Seed regardless of ratio
                current_limit = -1
            limit = self.dialog_input_number("Seed ratio limit for\n%s" % self.torrents[self.focus]['name'],
                                             current_limit, floating_point=True, allow_empty=True)
            if limit == -1:
                limit = 0
            if limit == -2: # -2 means 'empty' in dialog_input_number return codes
                limit = -1
            server.set_seed_ratio(float(limit), self.torrents[self.focus]['id'])
    def bandwidth_priority(self, c):
        if c == ord('-') and self.focus > -1:
            server.decrease_bandwidth_priority(self.torrents[self.focus]['id'])
        elif c == ord('+') and self.focus > -1:
            server.increase_bandwidth_priority(self.torrents[self.focus]['id'])
    def pause_unpause_torrent(self, c):
        if self.focus > -1:
            if self.selected_torrent > -1:
                t = self.torrent_details
            else:
                t = self.torrents[self.focus]
            if t['status'] == Transmission.STATUS_STOPPED:
                server.start_torrent(t['id'])
            else:
                server.stop_torrent(t['id'])
    def pause_unpause_all_torrent(self, c):
        if self.all_paused:
            for t in self.torrents:
                server.start_torrent(t['id'])
            self.all_paused = False
        else:
            for t in self.torrents:
                server.stop_torrent(t['id'])
            self.all_paused = True
    def verify_torrent(self, c):
        if self.focus > -1:
            if self.torrents[self.focus]['status'] != Transmission.STATUS_CHECK \
           and self.torrents[self.focus]['status'] != Transmission.STATUS_CHECK_WAIT:
                server.verify_torrent(self.torrents[self.focus]['id'])
    def reannounce_torrent(self, c):
        if self.focus > -1:
            server.reannounce_torrent(self.torrents[self.focus]['id'])
    def remove_torrent(self, c):
        if self.focus > -1:
            name = self.torrents[self.focus]['name'][0:self.width - 15]
            if self.dialog_yesno("Remove %s?" % name) == True:
                if self.selected_torrent > -1:  # leave details
                    server.set_torrent_details_id(-1)
                    self.selected_torrent = -1
                    self.details_category_focus = 0
                server.remove_torrent(self.torrents[self.focus]['id'])
    def remove_torrent_local_data(self, c):
        if self.focus > -1:
            name = self.torrents[self.focus]['name'][0:self.width - 15]
            if self.dialog_yesno("Remove and delete %s?" % name, important=True) == True:
                if self.selected_torrent > -1:  # leave details
                    server.set_torrent_details_id(-1)
                    self.selected_torrent = -1
                    self.details_category_focus = 0
                server.remove_torrent_local_data(self.torrents[self.focus]['id'])
    def add_tracker(self):
        if server.get_rpc_version() < 10:
            self.dialog_ok("You need Transmission v2.10 or higher to add trackers.")
            return
        tracker = self.dialog_input_text('Add tracker URL:')
        if tracker:
            t = self.torrent_details
            response = server.add_torrent_tracker(t['id'], tracker)
            if response:
                msg = wrap("Couldn't add tracker: %s" % response)
                self.dialog_ok("\n".join(msg))
    def remove_tracker(self):
        if server.get_rpc_version() < 10:
            self.dialog_ok("You need Transmission v2.10 or higher to remove trackers.")
            return
        t = self.torrent_details
        if (self.scrollpos_detaillist >= 0 and \
            self.scrollpos_detaillist < len(t['trackerStats']) and \
            self.dialog_yesno("Do you want to remove this tracker?") is True):
            tracker = t['trackerStats'][self.scrollpos_detaillist]
            response = server.remove_torrent_tracker(t['id'], tracker['id'])
            if response:
                msg = wrap("Couldn't remove tracker: %s" % response)
                self.dialog_ok("\n".join(msg))
    def movement_keys(self, c):
        if self.selected_torrent == -1 and len(self.torrents) > 0:
            if   c == curses.KEY_UP or c == ord('k') or c == curses.ascii.ctrl(ord('p')):
                self.focus, self.scrollpos = self.move_up(self.focus, self.scrollpos, self.tlist_item_height)
            elif c == curses.KEY_DOWN or c == ord('j') or c == curses.ascii.ctrl(ord('n')):
                self.focus, self.scrollpos = self.move_down(self.focus, self.scrollpos, self.tlist_item_height,
                                                            self.torrents_per_page, len(self.torrents))
            elif c == curses.KEY_PPAGE or c == curses.ascii.ctrl(ord('b')):
                self.focus, self.scrollpos = self.move_page_up(self.focus, self.scrollpos, self.tlist_item_height,
                                                               self.torrents_per_page)
            elif c == curses.KEY_NPAGE or c == curses.ascii.ctrl(ord('f')):
                self.focus, self.scrollpos = self.move_page_down(self.focus, self.scrollpos, self.tlist_item_height,
                                                                 self.torrents_per_page, len(self.torrents))
            elif c == curses.KEY_HOME or c == ord('g'):
                self.focus, self.scrollpos = self.move_to_top()
            elif c == curses.KEY_END or c == ord('G'):
                self.focus, self.scrollpos = self.move_to_end(self.tlist_item_height, self.torrents_per_page, len(self.torrents))
            self.focused_id = self.torrents[self.focus]['id']
        elif self.selected_torrent > -1:
            # file list
            if self.details_category_focus == 1:
                # focus/movement
                if c == curses.KEY_UP or c == ord('k') or c == curses.ascii.ctrl(ord('p')):
                    self.focus_detaillist, self.scrollpos_detaillist = \
                        self.move_up(self.focus_detaillist, self.scrollpos_detaillist, 1)
                elif c == curses.KEY_DOWN or c == ord('j') or c == curses.ascii.ctrl(ord('n')):
                    self.focus_detaillist, self.scrollpos_detaillist = \
                        self.move_down(self.focus_detaillist, self.scrollpos_detaillist, 1,
                                       self.detaillistitems_per_page, len(self.torrent_details['files']))
                elif c == curses.KEY_PPAGE or c == curses.ascii.ctrl(ord('b')):
                    self.focus_detaillist, self.scrollpos_detaillist = \
                        self.move_page_up(self.focus_detaillist, self.scrollpos_detaillist, 1,
                                          self.detaillistitems_per_page)
                elif c == curses.KEY_NPAGE or c == curses.ascii.ctrl(ord('f')):
                    self.focus_detaillist, self.scrollpos_detaillist = \
                        self.move_page_down(self.focus_detaillist, self.scrollpos_detaillist, 1,
                                            self.detaillistitems_per_page, len(self.torrent_details['files']))
                elif c == curses.KEY_HOME or c == ord('g'):
                    self.focus_detaillist, self.scrollpos_detaillist = self.move_to_top()
                elif c == curses.KEY_END or c == ord('G'):
                    self.focus_detaillist, self.scrollpos_detaillist = \
                        self.move_to_end(1, self.detaillistitems_per_page, len(self.torrent_details['files']))
            list_len = 0
            # peer list movement
            if self.details_category_focus == 2:
                list_len = len(self.torrent_details['peers'])
            # tracker list movement
            elif self.details_category_focus == 3:
                list_len = len(self.torrent_details['trackerStats'])
            # pieces list movement
            elif self.details_category_focus == 4:
                piece_count = self.torrent_details['pieceCount']
                margin = len(str(piece_count)) + 2
                map_width = int(str(self.width-margin-1)[0:-1] + '0')
                list_len = int(piece_count / map_width) + 1
            if list_len:
                if c == curses.KEY_UP or c == ord('k') or c == curses.ascii.ctrl(ord('p')):
                    if self.scrollpos_detaillist > 0:
                        self.scrollpos_detaillist -= 1
                elif c == curses.KEY_DOWN or c == ord('j') or c == curses.ascii.ctrl(ord('n')):
                    if self.scrollpos_detaillist < list_len - 1:
                        self.scrollpos_detaillist += 1
                elif c == curses.KEY_PPAGE or c == curses.ascii.ctrl(ord('b')):
                    self.scrollpos_detaillist = \
                        max(self.scrollpos_detaillist - self.detaillistitems_per_page - 1, 0)
                elif c == curses.KEY_NPAGE or c == curses.ascii.ctrl(ord('f')):
                    if self.scrollpos_detaillist + self.detaillistitems_per_page >= list_len:
                        self.scrollpos_detaillist = list_len - 1
                    else:
                        self.scrollpos_detaillist += self.detaillistitems_per_page
                elif c == curses.KEY_HOME or c == ord('g'):
                    self.scrollpos_detaillist = 0
                elif c == curses.KEY_END or c == ord('G'):
                    self.scrollpos_detaillist = list_len - 1
            # Disallow scrolling past the last item that would cause blank
            # space to be displayed in pieces and peer lists.
            if self.details_category_focus in (2, 4):
                self.scrollpos_detaillist = min(self.scrollpos_detaillist,
                    max(0, list_len - self.detaillistitems_per_page))
    def file_pritority_or_switch_details(self, c):
        if self.selected_torrent > -1:
            # file priority OR walk through details
            if c == curses.KEY_RIGHT or c == ord('l'):
                if self.details_category_focus == 1 and \
                        (self.selected_files or self.focus_detaillist > -1):
                    if self.selected_files:
                        files = set(self.selected_files)
                        server.increase_file_priority(files)
                    elif self.focus_detaillist > -1:
                        server.increase_file_priority([self.focus_detaillist])
                else:
                    self.scrollpos_detaillist = 0
                    self.next_details()
            elif c == curses.KEY_LEFT or c == ord('h'):
                if self.details_category_focus == 1 and \
                        (self.selected_files or self.focus_detaillist > -1):
                    if self.selected_files:
                        files = set(self.selected_files)
                        server.decrease_file_priority(files)
                    elif self.focus_detaillist > -1:
                        server.decrease_file_priority([self.focus_detaillist])
                else:
                    self.scrollpos_detaillist = 0
                    self.prev_details()
    def select_unselect_file(self, c):
        if self.selected_torrent > -1 and self.details_category_focus == 1 and self.focus_detaillist >= 0:
            # file selection with space
            if c == ord(' '):
                try:
                    self.selected_files.pop(self.selected_files.index(self.focus_detaillist))
                except ValueError:
                    self.selected_files.append(self.focus_detaillist)
                curses.ungetch(curses.KEY_DOWN) # move down
            # (un)select all files
            elif c == ord('a'):
                if self.selected_files:
                    self.selected_files = []
                else:
                    self.selected_files = range(0, len(self.torrent_details['files']))
    def move_in_details(self, c):
        if self.selected_torrent > -1:
            if c == ord("\t"):
                self.next_details()
            elif c == curses.KEY_BTAB:
                self.prev_details()
            elif c == ord('e'):
                self.details_category_focus = 2
            elif c == ord('c'):
                self.details_category_focus = 4
    def call_list_key_bindings(self, c):
        self.list_key_bindings()
    def toggle_compact_torrentlist(self, c):
        self.compact_list = not self.compact_list
    def move_torrent(self, c):
        if self.focus > -1:
            location = homedir2tilde(self.torrents[self.focus]['downloadDir'])
            msg = 'Move "%s" from\n%s to' % (self.torrents[self.focus]['name'], location)
            path = self.dialog_input_text(msg, location)
            if path:
                server.move_torrent(self.torrents[self.focus]['id'], tilde2homedir(path))
    def handle_user_input(self):
        c = self.screen.getch()
        if c == -1:
            return 0
        f = self.keybindings.get(c, None)
        if f:
            f(c)
        # update view
        if self.selected_torrent == -1:
            self.draw_torrent_list()
        else:
            self.draw_details()
    def filter_torrent_list(self):
        unfiltered = self.torrents
        if self.filter_list == 'downloading':
            self.torrents = [t for t in self.torrents if t['rateDownload'] > 0]
        elif self.filter_list == 'uploading':
            self.torrents = [t for t in self.torrents if t['rateUpload'] > 0]
        elif self.filter_list == 'paused':
            self.torrents = [t for t in self.torrents if t['status'] == Transmission.STATUS_STOPPED]
        elif self.filter_list == 'seeding':
            self.torrents = [t for t in self.torrents if t['status'] == Transmission.STATUS_SEED \
                                 or t['status'] == Transmission.STATUS_SEED_WAIT]
        elif self.filter_list == 'incomplete':
            self.torrents = [t for t in self.torrents if t['percentDone'] < 100]
        elif self.filter_list == 'active':
            self.torrents = [t for t in self.torrents if t['peersGettingFromUs'] > 0 \
                                 or t['peersSendingToUs'] > 0 \
                                 or t['status'] == Transmission.STATUS_CHECK]
        elif self.filter_list == 'verifying':
            self.torrents = [t for t in self.torrents if t['status'] == Transmission.STATUS_CHECK \
                                 or t['status'] == Transmission.STATUS_CHECK_WAIT]
        # invert list?
        if self.filter_inverse:
            self.torrents = [t for t in unfiltered if t not in self.torrents]
    def follow_list_focus(self):
        if self.focus == -1:
            return
        # check if list is empty or id to look for isn't in list
        ids = [t['id'] for t in self.torrents]
        if len(self.torrents) == 0 or self.focused_id not in ids:
            self.focus, self.scrollpos = -1, 0
            return
        # find focused_id
        self.focus = min(self.focus, len(self.torrents)-1)
        if self.torrents[self.focus]['id'] != self.focused_id:
            for i,t in enumerate(self.torrents):
                if t['id'] == self.focused_id:
                    self.focus = i
                    break
        # make sure the focus is not above the visible area
        while self.focus < (self.scrollpos/self.tlist_item_height):
            self.scrollpos -= self.tlist_item_height
        # make sure the focus is not below the visible area
        while self.focus > (self.scrollpos/self.tlist_item_height) + self.torrents_per_page-1:
            self.scrollpos += self.tlist_item_height
        # keep min and max bounds
        self.scrollpos = min(self.scrollpos, (len(self.torrents) - self.torrents_per_page) * self.tlist_item_height)
        self.scrollpos = max(0, self.scrollpos)
    def draw_torrent_list(self, search_keyword=''):
        self.torrents = server.get_torrent_list(self.sort_orders)
        self.filter_torrent_list()
        if search_keyword:
            matched_torrents = [t for t in self.torrents if search_keyword.lower() in t['name'].lower()]
            if matched_torrents:
                self.focus = 0
                if self.search_focus >= len(matched_torrents):
                    self.search_focus = 0
                self.focused_id = matched_torrents[self.search_focus]['id']
                self.highlight_dialog = False
            else:
                self.highlight_dialog = True
                curses.beep()
        else:
            self.search_focus = 0
        self.follow_list_focus()
        self.manage_layout()
        ypos = 0
        for i in range(len(self.torrents)):
            ypos += self.draw_torrentlist_item(self.torrents[i],
                                               (i == self.focus),
                                               self.compact_list,
                                               ypos)
        self.pad.refresh(self.scrollpos,0, 1,0, self.mainview_height,self.width-1)
        self.screen.refresh()
    def draw_torrentlist_item(self, torrent, focused, compact, y):
        # the torrent name is also a progress bar
        self.draw_torrentlist_title(torrent, focused, self.torrent_title_width, y)
        rates = ''
        if torrent['status'] == Transmission.STATUS_DOWNLOAD:
            self.draw_downloadrate(torrent, y)
        if torrent['status'] == Transmission.STATUS_DOWNLOAD or torrent['status'] == Transmission.STATUS_SEED:
            self.draw_uploadrate(torrent, y)
        if not compact:
            # the line below the title/progress
            if torrent['percentDone'] < 100 and torrent['status'] == Transmission.STATUS_DOWNLOAD:
                self.draw_eta(torrent, y)
            self.draw_ratio(torrent, y)
            self.draw_torrentlist_status(torrent, focused, y)
            return 3 # number of lines that were used for drawing the list item
        else:
            # Draw ratio in place of upload rate if upload rate = 0
            if not torrent['rateUpload']:
                self.draw_ratio(torrent, y - 1)
            return 1
    def draw_downloadrate(self, torrent, ypos):
        self.pad.move(ypos, self.width-self.rateDownload_width-self.rateUpload_width-3)
        self.pad.addch(curses.ACS_DARROW, (0,curses.A_BOLD)[torrent['downloadLimited']])
        rate = ('',scale_bytes(torrent['rateDownload']))[torrent['rateDownload']>0]
        self.pad.addstr(rate.rjust(self.rateDownload_width),
                        curses.color_pair(self.colors.get_id('download_rate')) + curses.A_BOLD + curses.A_REVERSE)
    def draw_uploadrate(self, torrent, ypos):
        self.pad.move(ypos, self.width-self.rateUpload_width-1)
        self.pad.addch(curses.ACS_UARROW, (0,curses.A_BOLD)[torrent['uploadLimited']])
        rate = ('',scale_bytes(torrent['rateUpload']))[torrent['rateUpload']>0]
        self.pad.addstr(rate.rjust(self.rateUpload_width),
                        curses.color_pair(self.colors.get_id('upload_rate')) + curses.A_BOLD + curses.A_REVERSE)
    def draw_ratio(self, torrent, ypos):
        self.pad.addch(ypos+1, self.width-self.rateUpload_width-1, curses.ACS_DIAMOND,
                       (0,curses.A_BOLD)[torrent['uploadRatio'] < 1 and torrent['uploadRatio'] >= 0])
        self.pad.addstr(ypos+1, self.width-self.rateUpload_width,
                        num2str(torrent['uploadRatio'], '%.02f').rjust(self.rateUpload_width),
                        curses.color_pair(self.colors.get_id('eta+ratio')) + curses.A_BOLD + curses.A_REVERSE)
    def draw_eta(self, torrent, ypos):
        self.pad.addch(ypos+1, self.width-self.rateDownload_width-self.rateUpload_width-3, curses.ACS_PLMINUS)
        self.pad.addstr(ypos+1, self.width-self.rateDownload_width-self.rateUpload_width-2,
                        scale_time(torrent['eta']).rjust(self.rateDownload_width),
                        curses.color_pair(self.colors.get_id('eta+ratio')) + curses.A_BOLD + curses.A_REVERSE)
    def draw_torrentlist_title(self, torrent, focused, width, ypos):
        if torrent['status'] == Transmission.STATUS_CHECK:
            percentDone = float(torrent['recheckProgress']) * 100
        else:
            percentDone = torrent['percentDone']
        bar_width = int(float(width) * (float(percentDone)/100))
        size = "%6s" % scale_bytes(torrent['sizeWhenDone'])
        if torrent['percentDone'] < 100:
            if torrent['seeders'] <= 0 and torrent['status'] != Transmission.STATUS_CHECK:
                size = "%6s / " % scale_bytes(torrent['available']) + size
            size = "%6s / " % scale_bytes(torrent['haveValid'] + torrent['haveUnchecked']) + size
        size = '| ' + size
        title = ljust_columns(torrent['name'], width - len(size)) + size
        if torrent['status'] == Transmission.STATUS_SEED \
        or torrent['status'] == Transmission.STATUS_SEED_WAIT:
            color = curses.color_pair(self.colors.get_id('title_seed'))
        elif torrent['status'] == Transmission.STATUS_STOPPED:
            color = curses.color_pair(self.colors.get_id('title_paused'))
        elif torrent['status'] == Transmission.STATUS_CHECK \
          or torrent['status'] == Transmission.STATUS_CHECK_WAIT:
            color = curses.color_pair(self.colors.get_id('title_verify'))
        elif torrent['rateDownload'] == 0:
            color = curses.color_pair(self.colors.get_id('title_idle'))
        elif torrent['percentDone'] < 100:
            color = curses.color_pair(self.colors.get_id('title_download'))
        else:
            color = 0
        tag = curses.A_REVERSE
        tag_done = tag + color
        if focused:
            tag += curses.A_BOLD
            tag_done += curses.A_BOLD
        if self.torrentname_is_progressbar:
            # addstr() dies when you tell it to draw on the last column of the
            # terminal, so we have to catch this exception.
            try:
                self.pad.addstr(ypos, 0, title[0:bar_width].encode('utf-8'), tag_done)
                self.pad.addstr(ypos, bar_width, title[bar_width:].encode('utf-8'), tag)
            except:
                pass
        else:
            self.pad.addstr(ypos, 0, title.encode('utf-8'), tag_done)
    def draw_torrentlist_status(self, torrent, focused, ypos):
        peers = ''
        parts = [server.get_status(torrent)]
        # show tracker error if appropriate
        if torrent['errorString'] and \
                not torrent['seeders'] and not torrent['leechers'] and \
                not torrent['status'] == Transmission.STATUS_STOPPED:
            parts[0] = torrent['errorString'].encode('utf-8')
        else:
            if torrent['status'] == Transmission.STATUS_CHECK:
                parts[0] += " (%d%%)" % int(float(torrent['recheckProgress']) * 100)
            elif torrent['status'] == Transmission.STATUS_DOWNLOAD:
                parts[0] += " (%d%%)" % torrent['percentDone']
            parts[0] = parts[0].ljust(20)
            # seeds and leeches will be appended right justified later
            peers  = "%5s seed%s " % (num2str(torrent['seeders']), ('s', ' ')[torrent['seeders']==1])
            peers += "%5s leech%s" % (num2str(torrent['leechers']), ('es', '  ')[torrent['leechers']==1])
            # show additional information if enough room
            if self.torrent_title_width - sum(map(lambda x: len(x), parts)) - len(peers) > 18:
                uploaded = scale_bytes(torrent['uploadedEver'])
                parts.append("%7s uploaded" % ('nothing',uploaded)[uploaded != '0B'])
            if self.torrent_title_width - sum(map(lambda x: len(x), parts)) - len(peers) > 22:
                parts.append("%4s peer%s connected" % (torrent['peersConnected'],
                                                       ('s',' ')[torrent['peersConnected'] == 1]))
        if focused: tags = curses.A_REVERSE + curses.A_BOLD
        else:       tags = 0
        remaining_space = self.torrent_title_width - sum(map(lambda x: len(x), parts), len(peers)) - 2
        delimiter = ' ' * int(remaining_space / (len(parts)))
        line = server.get_bandwidth_priority(torrent) + ' ' + delimiter.join(parts)
        # make sure the peers element is always right justified
        line += ' ' * int(self.torrent_title_width - len(line) - len(peers)) + peers
        self.pad.addstr(ypos+1, 0, line, tags)
    def draw_details(self):
        self.torrent_details = server.get_torrent_details()
        self.manage_layout()
        # details could need more space than the torrent list
        self.pad_height = max(50, len(self.torrent_details['files'])+10, (len(self.torrents)+1)*3, self.height)
        self.pad = curses.newpad(self.pad_height, self.width)
        # torrent name + progress bar
        self.draw_torrentlist_item(self.torrent_details, False, False, 0)
        # divider + menu
        menu_items = ['_Overview', "_Files", 'P_eers', '_Trackers', 'Pie_ces' ]
        xpos = int((self.width - sum(map(lambda x: len(x), menu_items))-len(menu_items)) / 2)
        for item in menu_items:
            self.pad.move(3, xpos)
            tags = curses.A_BOLD
            if menu_items.index(item) == self.details_category_focus:
                tags += curses.A_REVERSE
            title = item.split('_')
            self.pad.addstr(title[0], tags)
            self.pad.addstr(title[1][0], tags + curses.A_UNDERLINE)
            self.pad.addstr(title[1][1:], tags)
            xpos += len(item)+1
        # which details to display
        if self.details_category_focus == 0:
            self.draw_details_overview(5)
        elif self.details_category_focus == 1:
            self.draw_filelist(5)
        elif self.details_category_focus == 2:
            self.draw_peerlist(5)
        elif self.details_category_focus == 3:
            self.draw_trackerlist(5)
        elif self.details_category_focus == 4:
            self.draw_pieces_map(5)
        self.pad.refresh(0,0, 1,0, self.height-2,self.width)
        self.screen.refresh()
    def draw_details_overview(self, ypos):
        t = self.torrent_details
        info = []
        info.append(['Hash: ', "%s" % t['hashString']])
        info.append(['ID: ',   "%s" % t['id']])
        wanted = 0
        for i, file_info in enumerate(t['files']):
            if t['wanted'][i] == True: wanted += t['files'][i]['length']
        sizes = ['Size: ', "%s;  " % scale_bytes(t['totalSize'], 'long'),
                 "%s wanted;  " % (scale_bytes(wanted, 'long'),'everything') [t['totalSize'] == wanted]]
        if t['available'] < t['totalSize']:
            sizes.append("%s available;  " % scale_bytes(t['available'], 'long'))
        sizes.extend(["%s left" % scale_bytes(t['leftUntilDone'], 'long')])
        info.append(sizes)
        info.append(['Files: ', "%d;  " % len(t['files'])])
        complete     = map(lambda x: x['bytesCompleted'] == x['length'], t['files']).count(True)
        not_complete = filter(lambda x: x['bytesCompleted'] != x['length'], t['files'])
        partial      = map(lambda x: x['bytesCompleted'] > 0, not_complete).count(True)
        if complete == len(t['files']):
            info[-1].append("all complete")
        else:
            info[-1].append("%d complete;  " % complete)
            info[-1].append("%d commenced" % partial)
        info.append(['Pieces: ', "%s;  " % t['pieceCount'],
                     "%s each" % scale_bytes(t['pieceSize'], 'long')])
        info.append(['Download: '])
        info[-1].append("%s" % scale_bytes(t['downloadedEver'], 'long') + \
                        " (%d%%) received;  " % int(percent(t['sizeWhenDone'], t['downloadedEver'])))
        info[-1].append("%s" % scale_bytes(t['haveValid'], 'long') + \
                        " (%d%%) verified;  " % int(percent(t['sizeWhenDone'], t['haveValid'])))
        info[-1].append("%s corrupt"  % scale_bytes(t['corruptEver'], 'long'))
        if t['percentDone'] < 100:
            info[-1][-1] += ';  '
            if t['rateDownload']:
                info[-1].append("receiving %s per second" % scale_bytes(t['rateDownload'], 'long'))
                if t['downloadLimited']:
                    info[-1][-1] += " (throttled to %s)" % scale_bytes(t['downloadLimit']*1024, 'long')
            else:
                info[-1].append("no reception in progress")
        try:
            copies_distributed = (float(t['uploadedEver']) / float(t['sizeWhenDone']))
        except ZeroDivisionError:
            copies_distributed = 0
        info.append(['Upload: ', "%s " % scale_bytes(t['uploadedEver'], 'long') + \
                         "(%.2f copies) distributed;  " % copies_distributed])
        if t['rateUpload']:
            info[-1].append("sending %s per second" % scale_bytes(t['rateUpload'], 'long'))
            if t['uploadLimited']:
                info[-1][-1] += " (throttled to %s)" % scale_bytes(t['uploadLimit']*1024, 'long')
        else:
            info[-1].append("no transmission in progress")
        info.append(['Seed limit: '])
        if t['seedRatioMode'] == 0:
            if self.stats['seedRatioLimited']:
                info[-1].append('default (pause torrent after distributing %s copies)' % self.stats['seedRatioLimit'])
            else:
                info[-1].append('default (unlimited)')
        elif t['seedRatioMode'] == 1:
            info[-1].append('pause torrent after distributing %s copies' % t['seedRatioLimit'])
        elif t['seedRatioMode'] == 2:
            info[-1].append('unlimited (ignore global limits)')
        info.append(['Peers: ',
                     "connected to %d;  "     % t['peersConnected'],
                     "downloading from %d;  " % t['peersSendingToUs'],
                     "uploading to %d"        % t['peersGettingFromUs']])
        # average peer speed
        incomplete_peers = [peer for peer in self.torrent_details['peers'] if peer['progress'] < 1]
        if incomplete_peers:
            # use at least 2/3 or 10 of incomplete peers to make an estimation
            active_peers = [peer for peer in incomplete_peers if peer['download_speed']]
            min_active_peers = min(10, max(1, round(len(incomplete_peers)*0.666)))
            if 1 <= len(active_peers) >= min_active_peers:
                swarm_speed  = sum([peer['download_speed'] for peer in active_peers]) / len(active_peers)
                info.append(['Swarm speed: ', "%s on average;  " % scale_bytes(swarm_speed),
                             "distribution of 1 copy takes %s" % \
                                 scale_time(int(t['totalSize'] / swarm_speed), 'long')])
            else:
                info.append(['Swarm speed: ', "