a functional draft

1 files changed, 137 insertions, 0 deletions

diff --git a/watchnews.py b/watchnews.py
new file mode 100755
index 0000000..e22b483
--- /dev/null
+++ b/watchnews.py
@@ -0,0 +1,137 @@
+#!/usr/bin/env python3
+import data
+import web
+
+import feedparser
+from newspaper import Article
+from newspaper.outputformatters import OutputFormatter
+from newspaper.cleaners import DocumentCleaner
+
+import os
+import argparse
+import logging
+
+
+logging.basicConfig(level=logging.INFO)
+
+def update(feed):
+    logging.info("Update %s", feed.url)
+    result = feedparser.parse(feed.url)
+    if result['feed']['title'] != feed.title:
+        feed.title = result['feed']['title']
+        feed.save()
+
+    for entry in result['entries']:
+        try:
+            url = entry['link']
+            if 'id' in entry:
+                uid = entry['id']
+            else:
+                uid = entry['link']
+ 
+            item = data.Item.select() \
+                    .where((data.Item.uid == uid) & (data.Item.feed == feed)) \
+                    .first()
+            if not item:
+                item = data.Item.create(feed=feed, uid=uid)
+
+
+            paper = Article(entry['link'])
+            paper.download()
+            paper.parse()
+
+            if item.title != paper.title:
+                item.title = paper.title
+                item.save()
+
+            version = data.Version()
+            version.item = item
+            version.uid = uid
+            version.url = entry['link']
+            authors = paper.authors
+            authors.sort()
+            version.authors = ", ".join(authors)
+            version.title = paper.title
+            version.text = paper.text
+
+            # alternative, try if the rss body got a bigger text
+            document_cleaner = DocumentCleaner(paper.config)
+            output_formatter = OutputFormatter(paper.config)
+            # override this method since it doesn't work on summaries
+            output_formatter.links_to_text = lambda: None
+            doc = paper.config.get_parser().fromstring(entry['summary'])
+            doc = document_cleaner.clean(doc)
+            text, article_html = output_formatter.get_formatted(doc)
+
+            if len(text) < 2 and '<' not in entry['summary']:
+                text = entry['summary']
+
+            if len(text) > len(version.text):
+                version.text = text
+
+            if len(version.text) < 2: # less than 2 chars is likely failure
+                raise Exception("failed to parse {}\n{}".format(entry,version))
+
+            # search if the previous version was the same
+            ident_version = data.Version.select().where(
+                (data.Version.item == version.item) &
+                (data.Version.title == version.title) &
+                (data.Version.authors == version.authors) &
+                (data.Version.text == version.text)).first()
+
+            if ident_version:
+                logging.info("No change, skip %s", item.uid)
+            else:
+                version.save()
+                logging.info("Saved new version of %s: %s", item.uid, version.id)
+        except Exception as e:
+            logging.exception("Failed to process %s", entry['link'])
+
+
+if __name__ == "__main__":
+    db = data.SqliteDatabase(os.path.join(
+        os.path.dirname(__file__), "db.sqlite"))
+    data.db.initialize(db)
+
+    data.db.connect()
+    data.db.create_tables(filter(lambda t: not t.table_exists(),
+                                 data.BaseModel.__subclasses__()))
+
+    parser = argparse.ArgumentParser(description='Process some integers.')
+    parser.add_argument('--add', metavar='URL',
+            help='add feed with URL')
+    parser.add_argument('--update', action='store_true',
+            help='Update all known feeds')
+    parser.add_argument('--update-feed', type=int, metavar='ID',
+            help='Update feed with ID')
+    parser.add_argument('--remove', type=int, metavar='ID',
+            help='Remove feed with ID')
+    parser.add_argument('--list', action='store_true',
+            help='List all registered feeds')
+    parser.add_argument('--web', action='store_true',
+            help='Run web interface')
+
+    args = parser.parse_args()
+    if args.update:
+        for feed in data.Feed.select():
+            try:
+                update(feed)
+            except Exception as e:
+                logging.exception("Failed to update %s", feed.url)
+    if args.update_feed:
+        feed = data.Feed.get(data.Feed.id == args.update_feed)
+        if feed:
+            update(feed)
+    if args.add:
+        feed = data.Feed.create(url=args.add)
+        print("Added {}".format(feed))
+    if args.remove:
+        feed = data.Feed.get(data.Feed.id == args.remove)
+        feed.delete_instance()
+        print("Removed {}".format(feed))
+    if args.list:
+        for feed in data.Feed.select().order_by(data.Feed.created_date):
+            print("{0.id} - {1} - {0.title} - {0.url}".format(
+                feed, feed.created_date.strftime('%x %X')))
+    if args.web:
+        web.run()