clay/pages/mystations.py
"""
Components for "My stations" page.
"""
import urwid
from clay.gp import gp
from clay.songlist import SongListBox
from clay.notifications import notification_area
from clay.pages.page import AbstractPage
from clay.hotkeys import hotkey_manager
class MyStationListItem(urwid.Columns):
"""
One station in the list of stations.
"""
signals = ['activate']
def __init__(self, station):
self.station = station
self.text = urwid.SelectableIcon(u' \u2708 {} '.format(
self.station.name
), cursor_position=3)
self.text.set_layout('left', 'clip', None)
self.content = urwid.AttrWrap(
self.text,
'default',
'selected'
)
super(MyStationListItem, self).__init__([self.content])
def keypress(self, size, key):
"""
Handle keypress.
"""
return hotkey_manager.keypress("station_page", self, super(MyStationListItem, self),
size, key)
def start_station(self):
"""
Start playing the selected station
"""
urwid.emit_signal(self, 'activate', self)
class MyStationListBox(urwid.ListBox):
"""
List of stations.
"""
signals = ['activate']
def __init__(self, app):
self.app = app
self.walker = urwid.SimpleListWalker([
urwid.Text('Not ready')
])
self.notification = None
gp.auth_state_changed += self.auth_state_changed
super(MyStationListBox, self).__init__(self.walker)
def auth_state_changed(self, is_auth):
"""
Called when auth state changes (e. g. user is logged in).
Requests fetching of station.
"""
if is_auth:
self.walker[:] = [
urwid.Text(u'\n \uf01e Loading stations...', align='center')
]
gp.get_all_user_station_contents_async(callback=self.on_get_stations)
def on_get_stations(self, stations, error):
"""
Called when a list of stations fetch completes.
Populates list of stations.
"""
if error:
notification_area.notify('Failed to get stations: {}'.format(str(error)))
items = []
for station in stations:
mystationlistitem = MyStationListItem(station)
urwid.connect_signal(
mystationlistitem, 'activate', self.item_activated
)
items.append(mystationlistitem)
self.walker[:] = items
self.app.redraw()
def item_activated(self, mystationlistitem):
"""
Called when a specific station is selected.
Re-emits this event.
"""
urwid.emit_signal(self, 'activate', mystationlistitem)
class MyStationsPage(urwid.Columns, AbstractPage):
"""
Stations page.
Contains two parts:
- List of stations (:class:`.MyStationBox`)
- List of songs in selected station (:class:`clay:songlist:SongListBox`)
"""
@property
def name(self):
return 'Stations'
@property
def key(self):
return 3
@property
def slug(self):
"""
Return page ID (str).
"""
return "stations"
def __init__(self, app):
self.app = app
self.stationlist = MyStationListBox(app)
self.songlist = SongListBox(app)
self.songlist.set_placeholder('\n Select a station.')
urwid.connect_signal(
self.stationlist, 'activate', self.mystationlistitem_activated
)
super(MyStationsPage, self).__init__([
self.stationlist,
self.songlist
])
def mystationlistitem_activated(self, mystationlistitem):
"""
Called when specific station is selected.
Requests fetching of station tracks
"""
self.songlist.set_placeholder(u'\n \uf01e Loading station tracks...')
mystationlistitem.station.load_tracks_async(callback=self.on_station_loaded)
def on_station_loaded(self, station, error):
"""
Called when station tracks fetch completes.
Populates songlist with tracks from the selected station.
"""
if error:
notification_area.notify('Failed to get station tracks: {}'.format(str(error)))
self.songlist.populate(
station.get_tracks()
)
self.app.redraw()
def activate(self):
pass