Add remove_feed reader method.

Closes #7.

reader/cli.py

@@ -63,6 +63,19 @@ def add(db_path, url, update, verbose):
         reader.update_feed(url)
 
 
+@cli.command()
+@click.argument('url')
+@click.option('-v', '--verbose', count=True)
+@click.pass_obj
+def remove(db_path, url, verbose):
+    setup_logging(verbose)
+    try:
+        reader = Reader(db_path)
+    except Exception as e:
+        abort("{}: {}", db_path, e)
+    reader.remove_feed(url)
+
+
 @cli.command()
 @click.option('-v', '--verbose', count=True)
 @click.pass_obj

reader/reader.py

@@ -54,6 +54,21 @@ def add_feed(self, url):
                 VALUES (:url);
             """, locals())
 
+    def remove_feed(self, url):
+        with self.db:
+            self.db.execute("""
+                DELETE FROM entry_tags
+                WHERE feed = :url;
+            """, locals())
+            self.db.execute("""
+                DELETE FROM entries
+                WHERE feed = :url;
+            """, locals())
+            self.db.execute("""
+                DELETE FROM feeds
+                WHERE url = :url;
+            """, locals())
+
     def update_feeds(self):
         cursor =  self.db.execute("""
             SELECT url, updated, http_etag, http_last_modified, stale FROM feeds

tests/test_reader.py

@@ -181,3 +181,18 @@ def test_mark_as_read_unread(reader, feed_type):
     (feed, entry), = list(reader.get_entries())
     assert not entry.read
 
+
+@pytest.mark.parametrize('feed_type', ['rss', 'atom'])
+def test_add_remove_feed(reader, feed_type):
+
+    feed = make_feed(1, datetime(2010, 1, 1))
+    entry = make_entry(1, datetime(2010, 1, 1))
+    reader.add_feed(feed.url)
+    write_feed(feed_type, feed, [entry])
+    reader.update_feeds()
+
+    assert set(reader.get_entries()) == {(feed, entry)}
+
+    reader.remove_feed(feed.url)
+    assert set(reader.get_entries()) == set()
+