only parse rss feeds once every 10 minutes and store in json file

app.py

@@ -1,9 +1,11 @@
 import os
-from flask import Flask
+import json
 import flask_apscheduler
-# from flask_sqlalchemy import SQLAlchemy
-# db = SQLAlchemy()
-# migrate = Migrate()
+import tomli
+from flask import Flask
+
+from column import Column
+from simplejsonstorage import SimpleJsonStorage
 
 
 def create_app():
@@ -12,12 +14,32 @@ def create_app():
     scheduler.api_enabled = False
     scheduler.init_app(APP)
     scheduler.start()
-    # APP.config["SQLALCHEMY_DATABASE_URI"] = "sqlite:///data/crunk_data.db"
-    # APP.config["SQLALCHEMY_TRACK_MODIFICATIONS"] = True
-    # db.init_app(APP)
-    # migrate.init_app(APP, db, render_as_batch=True)
+    json_file = SimpleJsonStorage(
+        os.path.join("data", "feeds.json"), os.path.join("data", "feeds.log")
+    )
+    update_feeds(json_file)
+
     @scheduler.task("interval", id="update", minutes=10)
     def update():
-        print("Updating the RSS feeds!")
-        
+        update_feeds(json_file)
+
     return APP
+
+
+def update_feeds(json_file):
+    with open("columns.toml", "rb") as f:
+        column_dict = tomli.load(f)
+
+    columns_file = column_dict["column"]
+    columns = {}
+    for column_from_file in columns_file:
+        title = column_from_file["title"]
+        column = Column(title, column_from_file["urls"])
+
+        if "limit" in column_from_file:
+            column.set_limit(column_from_file["limit"])
+        if "sort_order" in column_from_file:
+            column.set_sort_order(column_from_file["sort_order"])
+        column.load_content_from_feeds()
+        columns[title] = column.__dict__
+    json_file.update(columns)

column.py

@@ -1,16 +1,17 @@
 import random
+import json
 from datetime import datetime
 from time import mktime
 from parse_rss_feeds import parse_rss_feeds
 
 
-class Column:
+class Column(object):
     def __init__(self, title, urls):
         self.title = title
         self.urls = urls
-        self.entries = None
-        self.sort_order = None
         self.limit = None
+        self.sort_order = None
+        self.entries = None
 
     def set_sort_order(self, sort_order):
         self.sort_order = sort_order
@@ -18,6 +19,12 @@ class Column:
     def set_limit(self, limit):
         self.limit = limit
 
+    def set_entries(self, entries):
+        self.entries = entries
+
+    def set_title(self, title):
+        self.title = title
+
     def _sort_by_order(self):
         entrylist = list(self.entries.items())
         if self.sort_order.lower() == "reverse":

data/feeds.json

@@ -0,0 +1 @@
+{}

parse_rss_feeds.py

@@ -2,7 +2,7 @@ from feedparser import parse
 import random
 
 
-def _parse_single_rss_feed(url, entries):
+def parse_single_rss_feed(url, entries):
     feed = parse(url)
     entrylength = len(entries)
     for entrynumber, entry in enumerate(feed.entries):
@@ -21,5 +21,5 @@ def _parse_single_rss_feed(url, entries):
 def parse_rss_feeds(urls):
     entries = {}
     for url in urls:
-        entries = _parse_single_rss_feed(url, entries)
+        entries = parse_single_rss_feed(url, entries)
     return entries

simplejsonstorage.py

@@ -0,0 +1,60 @@
+from os import environ, mkdir
+from os.path import exists
+from pathlib import Path
+from logging import DEBUG, INFO, basicConfig, getLogger
+from json import dumps, loads
+
+class SimpleJsonStorage(dict):
+	"""A simple json file.
+	It is a dictionary which saves to disk on all writes. It is optimised for
+	ease of hacking and accessibility and not for performance or efficiency.
+	Written by decentral1se, as part of:
+	https://git.vvvvvvaria.org/decentral1se/xbotlib/src/branch/main/xbotlib.py
+	"""
+
+	def __init__(self, filename, log, *args, **kwargs):
+		"""Initialise the object."""
+		self.filename = Path(filename).absolute()
+		self.log = getLogger(__name__)
+
+		self._loads()
+		self.update(*args, **kwargs)
+
+	def _loads(self):
+		"""Load the file."""
+		if not exists(self.filename):
+			return
+
+		try:
+			with open(self.filename, "r") as handle:
+				self.update(loads(handle.read()))
+		except Exception as exception:
+			message = f"Loading file storage failed: {exception}"
+			self.log.error(message, exc_info=exception)
+			exit(1)
+
+	def _dumps(self):
+		"""Save the file to disk."""
+		try:
+			with open(self.filename, "w") as handle:
+				handle.write(dumps(self, indent=4, sort_keys=True))
+		except Exception as exception:
+			message = f"Saving file storage failed: {exception}"
+			self.log.error(message, exc_info=exception)
+			exit(1)
+
+	def __setitem__(self, key, val):
+		"""Write data to the file."""
+		super().__setitem__(key, val)
+		self._dumps()
+
+	def __delitem__(self, key):
+		"""Remove data from the file."""
+		super().__delitem__(key)
+		self._dumps()
+
+	def update(self, *args, **kwargs):
+		"""Update the file."""
+		for k, v in dict(*args, **kwargs).items():
+			self[k] = v
+		self._dumps()

start.py

@@ -1,6 +1,8 @@
 import tomli
+import os
+import json
 from flask import render_template
-
+from simplejsonstorage import SimpleJsonStorage
 from app import create_app
 from column import Column
 
@@ -9,26 +11,22 @@ APP = create_app()
 
 @APP.route("/")
 def index():
-    with open("columns.toml", "rb") as f:
-        column_dict = tomli.load(f)
-
-    columns_file = column_dict["column"]
+    json_file = load_json_file()
     columns = []
-    for column_from_file in columns_file:
-        urls = column_from_file["urls"]
-        title = column_from_file["title"]
-        column = Column(title=title, urls=urls)
-
-        if "limit" in column_from_file:
-            column.set_limit(column_from_file["limit"])
-        if "sort_order" in column_from_file:
-            column.set_sort_order(column_from_file["sort_order"])
-
-        column.load_content_from_feeds()
+    for key, value in json_file.items():
+        print(key)
+        column = Column(value["title"], value["urls"])
+        column.set_entries(value["entries"])
         columns.append(column)
     return render_template("index.html", columns=columns)
 
 
+def load_json_file():
+    json_file = SimpleJsonStorage(
+        os.path.join("data", "feeds.json"), os.path.join("data", "feeds.log")
+    )
+    return json_file
+
 if __name__ == "__main__":
     APP.debug = True
     APP.run(port=5000)