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#############################################################################
##
## Copyright (C) 2021 The Qt Company Ltd.
## Contact: http://www.qt.io/licensing/
##
## This file is part of the Qt for Python examples of the Qt Toolkit.
##
## $QT_BEGIN_LICENSE:BSD$
## You may use this file under the terms of the BSD license as follows:
##
## "Redistribution and use in source and binary forms, with or without
## modification, are permitted provided that the following conditions are
## met:
## * Redistributions of source code must retain the above copyright
## notice, this list of conditions and the following disclaimer.
## * Redistributions in binary form must reproduce the above copyright
## notice, this list of conditions and the following disclaimer in
## the documentation and/or other materials provided with the
## distribution.
## * Neither the name of The Qt Company Ltd nor the names of its
## contributors may be used to endorse or promote products derived
## from this software without specific prior written permission.
##
##
## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
## "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
## LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
## A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
## OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
## SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
## LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
## DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
## THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
## (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
## OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
##
## $QT_END_LICENSE$
##
#############################################################################
import functools
from PySide6.QtCore import (QAbstractTableModel, QJsonDocument, QModelIndex,
Qt, Signal, Slot)
from PySide6.QtNetwork import QNetworkReply
from redditwrapper import RedditWrapper
class RedditModel(QAbstractTableModel):
error = Signal(str)
def __init__(self, client_id):
super().__init__()
self._reddit_wrapper = RedditWrapper(client_id)
self._reddit_wrapper.authenticated.connect(self.update)
self._live_thread_reply = None
self._threads = []
self.grant()
def rowCount(self, parent):
return len(self._threads)
def columnCount(self, parent):
return 1 if self._threads else 0
def data(self, index, role):
if not index.isValid():
return None
if role == Qt.DisplayRole:
children_object = self._threads[index.row()]
data_object = children_object["data"]
return data_object["title"]
return None
def grant(self):
self._reddit_wrapper.grant()
@Slot(QNetworkReply)
def reply_finished(self, reply):
reply.deleteLater()
if reply.error() != QNetworkReply.NoError:
error = reply.errorString()
print(f"Reddit error: {error}")
self.error.emit(error)
return
json = reply.readAll()
document = QJsonDocument.fromJson(json)
root_object = document.object()
kind = root_object["kind"]
assert(kind == "Listing")
data_object = root_object["data"]
children_array = data_object["children"]
if not children_array:
return
self.beginInsertRows(QModelIndex(), len(self._threads),
len(children_array) + len(self._threads) - 1)
for childValue in children_array:
self._threads.append(childValue)
self.endInsertRows()
@Slot()
def update(self):
reply = self._reddit_wrapper.request_hot_threads()
reply.finished.connect(functools.partial(self.reply_finished,
reply=reply))
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