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# Copyright (C) 2022 The Qt Company Ltd.
# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
from __future__ import annotations
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.ItemDataRole.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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