openwebrx-clone/owrx/bookmarks.py

88 lines
2.5 KiB
Python
Raw Normal View History

2021-02-13 00:10:36 +00:00
from datetime import datetime, timezone
2019-09-27 22:53:58 +00:00
import json
2021-02-13 00:10:36 +00:00
import os
2019-09-27 22:53:58 +00:00
2019-12-15 16:44:31 +00:00
import logging
logger = logging.getLogger(__name__)
2019-09-27 22:53:58 +00:00
class Bookmark(object):
def __init__(self, j):
self.name = j["name"]
self.frequency = j["frequency"]
self.modulation = j["modulation"]
def getName(self):
return self.name
def getFrequency(self):
return self.frequency
def getModulation(self):
return self.modulation
def __dict__(self):
return {
"name": self.getName(),
"frequency": self.getFrequency(),
"modulation": self.getModulation(),
}
class Bookmarks(object):
sharedInstance = None
2019-11-23 00:12:21 +00:00
2019-09-27 22:53:58 +00:00
@staticmethod
def getSharedInstance():
if Bookmarks.sharedInstance is None:
Bookmarks.sharedInstance = Bookmarks()
return Bookmarks.sharedInstance
def __init__(self):
2021-02-13 00:10:36 +00:00
self.file_modified = None
self.bookmarks = []
self.fileList = ["/etc/openwebrx/bookmarks.json", "bookmarks.json"]
2021-02-13 00:29:21 +00:00
def _refresh(self):
2021-02-13 00:10:36 +00:00
modified = self._getFileModifiedTimestamp()
if self.file_modified is None or modified > self.file_modified:
logger.debug("reloading bookmarks from disk due to file modification")
self.bookmarks = self._loadBookmarks()
self.file_modified = modified
def _getFileModifiedTimestamp(self):
timestamp = 0
for file in self.fileList:
try:
timestamp = os.path.getmtime(file)
break
except FileNotFoundError:
pass
return datetime.fromtimestamp(timestamp, timezone.utc)
def _loadBookmarks(self):
for file in self.fileList:
try:
f = open(file, "r")
bookmarks_json = json.load(f)
f.close()
return [Bookmark(d) for d in bookmarks_json]
except FileNotFoundError:
pass
2019-12-15 16:44:31 +00:00
except json.JSONDecodeError:
logger.exception("error while parsing bookmarks file %s", file)
return []
except Exception:
logger.exception("error while processing bookmarks from %s", file)
2019-12-15 16:44:31 +00:00
return []
return []
2021-02-13 17:35:15 +00:00
def getBookmarks(self, range=None):
2021-02-13 00:29:21 +00:00
self._refresh()
2021-02-13 17:35:15 +00:00
if range is None:
return self.bookmarks
else:
(lo, hi) = range
return [b for b in self.bookmarks if lo <= b.getFrequency() <= hi]