diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..c9ec333
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,11 @@
+__pycache__
+.cache
+.mypy_cache
+.pytest_cache
+build
+dist
+*.egg-info
+
+*~
+.#*
+*#
diff --git a/.isort.cfg b/.isort.cfg
new file mode 100644
index 0000000..9caba16
--- /dev/null
+++ b/.isort.cfg
@@ -0,0 +1,2 @@
+[isort]
+profile=black
diff --git a/.mypy.ini b/.mypy.ini
new file mode 100644
index 0000000..976ba02
--- /dev/null
+++ b/.mypy.ini
@@ -0,0 +1,2 @@
+[mypy]
+ignore_missing_imports = True
diff --git a/CHANGELOG.rst b/CHANGELOG.rst
new file mode 100644
index 0000000..5a18fcc
--- /dev/null
+++ b/CHANGELOG.rst
@@ -0,0 +1,7 @@
+Changelog
+*********
+
+1.0.0
+-----
+
+- initial release
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..14e2f77
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,373 @@
+Mozilla Public License Version 2.0
+==================================
+
+1. Definitions
+--------------
+
+1.1. "Contributor"
+    means each individual or legal entity that creates, contributes to
+    the creation of, or owns Covered Software.
+
+1.2. "Contributor Version"
+    means the combination of the Contributions of others (if any) used
+    by a Contributor and that particular Contributor's Contribution.
+
+1.3. "Contribution"
+    means Covered Software of a particular Contributor.
+
+1.4. "Covered Software"
+    means Source Code Form to which the initial Contributor has attached
+    the notice in Exhibit A, the Executable Form of such Source Code
+    Form, and Modifications of such Source Code Form, in each case
+    including portions thereof.
+
+1.5. "Incompatible With Secondary Licenses"
+    means
+
+    (a) that the initial Contributor has attached the notice described
+        in Exhibit B to the Covered Software; or
+
+    (b) that the Covered Software was made available under the terms of
+        version 1.1 or earlier of the License, but not also under the
+        terms of a Secondary License.
+
+1.6. "Executable Form"
+    means any form of the work other than Source Code Form.
+
+1.7. "Larger Work"
+    means a work that combines Covered Software with other material, in 
+    a separate file or files, that is not Covered Software.
+
+1.8. "License"
+    means this document.
+
+1.9. "Licensable"
+    means having the right to grant, to the maximum extent possible,
+    whether at the time of the initial grant or subsequently, any and
+    all of the rights conveyed by this License.
+
+1.10. "Modifications"
+    means any of the following:
+
+    (a) any file in Source Code Form that results from an addition to,
+        deletion from, or modification of the contents of Covered
+        Software; or
+
+    (b) any new file in Source Code Form that contains any Covered
+        Software.
+
+1.11. "Patent Claims" of a Contributor
+    means any patent claim(s), including without limitation, method,
+    process, and apparatus claims, in any patent Licensable by such
+    Contributor that would be infringed, but for the grant of the
+    License, by the making, using, selling, offering for sale, having
+    made, import, or transfer of either its Contributions or its
+    Contributor Version.
+
+1.12. "Secondary License"
+    means either the GNU General Public License, Version 2.0, the GNU
+    Lesser General Public License, Version 2.1, the GNU Affero General
+    Public License, Version 3.0, or any later versions of those
+    licenses.
+
+1.13. "Source Code Form"
+    means the form of the work preferred for making modifications.
+
+1.14. "You" (or "Your")
+    means an individual or a legal entity exercising rights under this
+    License. For legal entities, "You" includes any entity that
+    controls, is controlled by, or is under common control with You. For
+    purposes of this definition, "control" means (a) the power, direct
+    or indirect, to cause the direction or management of such entity,
+    whether by contract or otherwise, or (b) ownership of more than
+    fifty percent (50%) of the outstanding shares or beneficial
+    ownership of such entity.
+
+2. License Grants and Conditions
+--------------------------------
+
+2.1. Grants
+
+Each Contributor hereby grants You a world-wide, royalty-free,
+non-exclusive license:
+
+(a) under intellectual property rights (other than patent or trademark)
+    Licensable by such Contributor to use, reproduce, make available,
+    modify, display, perform, distribute, and otherwise exploit its
+    Contributions, either on an unmodified basis, with Modifications, or
+    as part of a Larger Work; and
+
+(b) under Patent Claims of such Contributor to make, use, sell, offer
+    for sale, have made, import, and otherwise transfer either its
+    Contributions or its Contributor Version.
+
+2.2. Effective Date
+
+The licenses granted in Section 2.1 with respect to any Contribution
+become effective for each Contribution on the date the Contributor first
+distributes such Contribution.
+
+2.3. Limitations on Grant Scope
+
+The licenses granted in this Section 2 are the only rights granted under
+this License. No additional rights or licenses will be implied from the
+distribution or licensing of Covered Software under this License.
+Notwithstanding Section 2.1(b) above, no patent license is granted by a
+Contributor:
+
+(a) for any code that a Contributor has removed from Covered Software;
+    or
+
+(b) for infringements caused by: (i) Your and any other third party's
+    modifications of Covered Software, or (ii) the combination of its
+    Contributions with other software (except as part of its Contributor
+    Version); or
+
+(c) under Patent Claims infringed by Covered Software in the absence of
+    its Contributions.
+
+This License does not grant any rights in the trademarks, service marks,
+or logos of any Contributor (except as may be necessary to comply with
+the notice requirements in Section 3.4).
+
+2.4. Subsequent Licenses
+
+No Contributor makes additional grants as a result of Your choice to
+distribute the Covered Software under a subsequent version of this
+License (see Section 10.2) or under the terms of a Secondary License (if
+permitted under the terms of Section 3.3).
+
+2.5. Representation
+
+Each Contributor represents that the Contributor believes its
+Contributions are its original creation(s) or it has sufficient rights
+to grant the rights to its Contributions conveyed by this License.
+
+2.6. Fair Use
+
+This License is not intended to limit any rights You have under
+applicable copyright doctrines of fair use, fair dealing, or other
+equivalents.
+
+2.7. Conditions
+
+Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted
+in Section 2.1.
+
+3. Responsibilities
+-------------------
+
+3.1. Distribution of Source Form
+
+All distribution of Covered Software in Source Code Form, including any
+Modifications that You create or to which You contribute, must be under
+the terms of this License. You must inform recipients that the Source
+Code Form of the Covered Software is governed by the terms of this
+License, and how they can obtain a copy of this License. You may not
+attempt to alter or restrict the recipients' rights in the Source Code
+Form.
+
+3.2. Distribution of Executable Form
+
+If You distribute Covered Software in Executable Form then:
+
+(a) such Covered Software must also be made available in Source Code
+    Form, as described in Section 3.1, and You must inform recipients of
+    the Executable Form how they can obtain a copy of such Source Code
+    Form by reasonable means in a timely manner, at a charge no more
+    than the cost of distribution to the recipient; and
+
+(b) You may distribute such Executable Form under the terms of this
+    License, or sublicense it under different terms, provided that the
+    license for the Executable Form does not attempt to limit or alter
+    the recipients' rights in the Source Code Form under this License.
+
+3.3. Distribution of a Larger Work
+
+You may create and distribute a Larger Work under terms of Your choice,
+provided that You also comply with the requirements of this License for
+the Covered Software. If the Larger Work is a combination of Covered
+Software with a work governed by one or more Secondary Licenses, and the
+Covered Software is not Incompatible With Secondary Licenses, this
+License permits You to additionally distribute such Covered Software
+under the terms of such Secondary License(s), so that the recipient of
+the Larger Work may, at their option, further distribute the Covered
+Software under the terms of either this License or such Secondary
+License(s).
+
+3.4. Notices
+
+You may not remove or alter the substance of any license notices
+(including copyright notices, patent notices, disclaimers of warranty,
+or limitations of liability) contained within the Source Code Form of
+the Covered Software, except that You may alter any license notices to
+the extent required to remedy known factual inaccuracies.
+
+3.5. Application of Additional Terms
+
+You may choose to offer, and to charge a fee for, warranty, support,
+indemnity or liability obligations to one or more recipients of Covered
+Software. However, You may do so only on Your own behalf, and not on
+behalf of any Contributor. You must make it absolutely clear that any
+such warranty, support, indemnity, or liability obligation is offered by
+You alone, and You hereby agree to indemnify every Contributor for any
+liability incurred by such Contributor as a result of warranty, support,
+indemnity or liability terms You offer. You may include additional
+disclaimers of warranty and limitations of liability specific to any
+jurisdiction.
+
+4. Inability to Comply Due to Statute or Regulation
+---------------------------------------------------
+
+If it is impossible for You to comply with any of the terms of this
+License with respect to some or all of the Covered Software due to
+statute, judicial order, or regulation then You must: (a) comply with
+the terms of this License to the maximum extent possible; and (b)
+describe the limitations and the code they affect. Such description must
+be placed in a text file included with all distributions of the Covered
+Software under this License. Except to the extent prohibited by statute
+or regulation, such description must be sufficiently detailed for a
+recipient of ordinary skill to be able to understand it.
+
+5. Termination
+--------------
+
+5.1. The rights granted under this License will terminate automatically
+if You fail to comply with any of its terms. However, if You become
+compliant, then the rights granted under this License from a particular
+Contributor are reinstated (a) provisionally, unless and until such
+Contributor explicitly and finally terminates Your grants, and (b) on an
+ongoing basis, if such Contributor fails to notify You of the
+non-compliance by some reasonable means prior to 60 days after You have
+come back into compliance. Moreover, Your grants from a particular
+Contributor are reinstated on an ongoing basis if such Contributor
+notifies You of the non-compliance by some reasonable means, this is the
+first time You have received notice of non-compliance with this License
+from such Contributor, and You become compliant prior to 30 days after
+Your receipt of the notice.
+
+5.2. If You initiate litigation against any entity by asserting a patent
+infringement claim (excluding declaratory judgment actions,
+counter-claims, and cross-claims) alleging that a Contributor Version
+directly or indirectly infringes any patent, then the rights granted to
+You by any and all Contributors for the Covered Software under Section
+2.1 of this License shall terminate.
+
+5.3. In the event of termination under Sections 5.1 or 5.2 above, all
+end user license agreements (excluding distributors and resellers) which
+have been validly granted by You or Your distributors under this License
+prior to termination shall survive termination.
+
+************************************************************************
+*                                                                      *
+*  6. Disclaimer of Warranty                                           *
+*  -------------------------                                           *
+*                                                                      *
+*  Covered Software is provided under this License on an "as is"       *
+*  basis, without warranty of any kind, either expressed, implied, or  *
+*  statutory, including, without limitation, warranties that the       *
+*  Covered Software is free of defects, merchantable, fit for a        *
+*  particular purpose or non-infringing. The entire risk as to the     *
+*  quality and performance of the Covered Software is with You.        *
+*  Should any Covered Software prove defective in any respect, You     *
+*  (not any Contributor) assume the cost of any necessary servicing,   *
+*  repair, or correction. This disclaimer of warranty constitutes an   *
+*  essential part of this License. No use of any Covered Software is   *
+*  authorized under this License except under this disclaimer.         *
+*                                                                      *
+************************************************************************
+
+************************************************************************
+*                                                                      *
+*  7. Limitation of Liability                                          *
+*  --------------------------                                          *
+*                                                                      *
+*  Under no circumstances and under no legal theory, whether tort      *
+*  (including negligence), contract, or otherwise, shall any           *
+*  Contributor, or anyone who distributes Covered Software as          *
+*  permitted above, be liable to You for any direct, indirect,         *
+*  special, incidental, or consequential damages of any character      *
+*  including, without limitation, damages for lost profits, loss of    *
+*  goodwill, work stoppage, computer failure or malfunction, or any    *
+*  and all other commercial damages or losses, even if such party      *
+*  shall have been informed of the possibility of such damages. This   *
+*  limitation of liability shall not apply to liability for death or   *
+*  personal injury resulting from such party's negligence to the       *
+*  extent applicable law prohibits such limitation. Some               *
+*  jurisdictions do not allow the exclusion or limitation of           *
+*  incidental or consequential damages, so this exclusion and          *
+*  limitation may not apply to You.                                    *
+*                                                                      *
+************************************************************************
+
+8. Litigation
+-------------
+
+Any litigation relating to this License may be brought only in the
+courts of a jurisdiction where the defendant maintains its principal
+place of business and such litigation shall be governed by laws of that
+jurisdiction, without reference to its conflict-of-law provisions.
+Nothing in this Section shall prevent a party's ability to bring
+cross-claims or counter-claims.
+
+9. Miscellaneous
+----------------
+
+This License represents the complete agreement concerning the subject
+matter hereof. If any provision of this License is held to be
+unenforceable, such provision shall be reformed only to the extent
+necessary to make it enforceable. Any law or regulation which provides
+that the language of a contract shall be construed against the drafter
+shall not be used to construe this License against a Contributor.
+
+10. Versions of the License
+---------------------------
+
+10.1. New Versions
+
+Mozilla Foundation is the license steward. Except as provided in Section
+10.3, no one other than the license steward has the right to modify or
+publish new versions of this License. Each version will be given a
+distinguishing version number.
+
+10.2. Effect of New Versions
+
+You may distribute the Covered Software under the terms of the version
+of the License under which You originally received the Covered Software,
+or under the terms of any subsequent version published by the license
+steward.
+
+10.3. Modified Versions
+
+If you create software not governed by this License, and you want to
+create a new license for such software, you may create and use a
+modified version of this License if you rename the license and remove
+any references to the name of the license steward (except to note that
+such modified license differs from this License).
+
+10.4. Distributing Source Code Form that is Incompatible With Secondary
+Licenses
+
+If You choose to distribute Source Code Form that is Incompatible With
+Secondary Licenses under the terms of this version of the License, the
+notice described in Exhibit B of this License must be attached.
+
+Exhibit A - Source Code Form License Notice
+-------------------------------------------
+
+  This Source Code Form is subject to the terms of the Mozilla Public
+  License, v. 2.0. If a copy of the MPL was not distributed with this
+  file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+If it is not possible or desirable to put the notice in a particular
+file, then You may include the notice in a location (such as a LICENSE
+file in a relevant directory) where a recipient would be likely to look
+for such a notice.
+
+You may add additional accurate notices of copyright ownership.
+
+Exhibit B - "Incompatible With Secondary Licenses" Notice
+---------------------------------------------------------
+
+  This Source Code Form is "Incompatible With Secondary Licenses", as
+  defined by the Mozilla Public License, v. 2.0.
diff --git a/MANIFEST.in b/MANIFEST.in
new file mode 100644
index 0000000..7d61281
--- /dev/null
+++ b/MANIFEST.in
@@ -0,0 +1,2 @@
+include LICENSE
+include *.rst
diff --git a/README.rst b/README.rst
new file mode 100644
index 0000000..039d6f9
--- /dev/null
+++ b/README.rst
@@ -0,0 +1,4 @@
+Feeds
+=====
+
+A SimpleBot plugin that allows to subscribe to RSS/Atoms feeds.
diff --git a/pylama.ini b/pylama.ini
new file mode 100644
index 0000000..98358cd
--- /dev/null
+++ b/pylama.ini
@@ -0,0 +1,4 @@
+[pylama]
+linters=mccabe,pyflakes,pylint,isort,mypy
+ignore=C0116,C0103,C0301
+skip=tests/*,build/*,simplebot_*/orm.py
diff --git a/setup.py b/setup.py
new file mode 100644
index 0000000..cf461f0
--- /dev/null
+++ b/setup.py
@@ -0,0 +1,51 @@
+"""Setup module installation."""
+
+import os
+import re
+
+from setuptools import find_packages, setup
+
+if __name__ == "__main__":
+    MODULE_NAME = 'simplebot_feeds'
+    DESC = 'A plugin for SimpleBot, a Delta Chat(http://delta.chat/) bot'
+
+    init_file = os.path.join(MODULE_NAME, '__init__.py')
+    with open(init_file) as fh:
+        version = re.search(
+            r'__version__ = \'(.*?)\'', fh.read(), re.M).group(1)
+
+    with open('README.rst') as fh:
+        long_description = fh.read()
+    with open('CHANGELOG.rst') as fh:
+        long_description += fh.read()
+    with open('LICENSE') as fh:
+        long_description += fh.read()
+
+    setup(
+        name=MODULE_NAME,
+        version=version,
+        description=DESC,
+        long_description=long_description,
+        long_description_content_type='text/x-rst',
+        keywords='simplebot plugin deltachat',
+        license='MPL',
+        classifiers=[
+            'Development Status :: 3 - Alpha',
+            'Environment :: Plugins',
+            'Programming Language :: Python :: 3',
+            'License :: OSI Approved :: Mozilla Public License 2.0 (MPL 2.0)',
+            'Operating System :: OS Independent',
+            'Topic :: Utilities',
+        ],
+        zip_safe=False,
+        include_package_data=True,
+        packages=find_packages(),
+        install_requires=[
+            'simplebot',
+            'feedparser',
+            'html2text'
+        ],
+        entry_points={
+            'simplebot.plugins': '{0} = {0}'.format(MODULE_NAME),
+        },
+    )
diff --git a/simplebot_feeds/__init__.py b/simplebot_feeds/__init__.py
new file mode 100644
index 0000000..5c083e8
--- /dev/null
+++ b/simplebot_feeds/__init__.py
@@ -0,0 +1,249 @@
+
+import os
+import sqlite3
+from threading import Thread
+from time import sleep
+from typing import Optional
+
+import feedparser
+import html2text
+import simplebot
+from deltachat import Chat, Contact, Message
+from feedparser.exceptions import CharacterEncodingOverride
+from simplebot.bot import DeltaBot, Replies
+
+from .db import DBManager
+from .util import ResultProcess
+
+__version__ = '1.0.0'
+feedparser.USER_AGENT = 'Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:60.0)'
+feedparser.USER_AGENT += ' Gecko/20100101 Firefox/60.0'
+html2text.config.WRAP_LINKS = False
+db: DBManager
+TIMEOUT = 60
+
+
+@simplebot.hookimpl
+def deltabot_init(bot: DeltaBot) -> None:
+    global db
+    db = _get_db(bot)
+
+    _getdefault(bot, 'delay', 60*5)
+    _getdefault(bot, 'max_feed_count', -1)
+
+
+@simplebot.hookimpl
+def deltabot_start(bot: DeltaBot) -> None:
+    Thread(target=_check_feeds, args=(bot,), daemon=True).start()
+
+
+@simplebot.hookimpl
+def deltabot_member_removed(bot: DeltaBot, chat: Chat, contact: Contact) -> None:
+    me = bot.self_contact
+    if me == contact or len(chat.get_contacts()) <= 1:
+        feeds = db.get_feeds(chat.id)
+        if feeds:
+            db.remove_fchat(chat.id)
+            for feed in feeds:
+                if not db.get_fchats(feed['url']):
+                    db.remove_feed(feed['url'])
+
+
+@simplebot.command
+def feed_sub(bot: DeltaBot, payload: str, message: Message, replies: Replies) -> None:
+    """Subscribe current chat to the given feed.
+    """
+    url = db.normalize_url(payload)
+    feed = db.get_feed(url)
+
+    if feed:
+        process = ResultProcess(target=feedparser.parse, args=(feed['url'],))
+        process.start()
+        d = process.get_result(TIMEOUT)
+    else:
+        max_fc = int(_getdefault(bot, 'max_feed_count'))
+        if 0 <= max_fc <= len(db.get_feeds()):
+            replies.add(text='Sorry, maximum number of feeds reached')
+            return
+        process = ResultProcess(target=feedparser.parse, args=(url,))
+        process.start()
+        d = process.get_result(TIMEOUT)
+        bozo_exception = d.get('bozo_exception', '')
+        if (d.get('bozo') == 1 and not isinstance(
+                bozo_exception, CharacterEncodingOverride)) or not d.entries:
+            replies.add(text='Invalid feed url: {}'.format(url))
+            bot.logger.warning('Invalid feed %s: %s', url, bozo_exception)
+            return
+        feed = dict(
+            url=url,
+            etag=d.get('etag'),
+            modified=d.get('modified') or d.get('updated'),
+            latest=get_latest_date(d.entries),
+        )
+        db.add_feed(url, feed['etag'], feed['modified'], feed['latest'])
+    assert feed
+
+    if message.chat.is_group():
+        chat = message.chat
+    else:
+        chat = bot.create_group(
+            d.feed.get('title') or url, [message.get_sender_contact()])
+
+    if chat.id in db.get_fchats(feed['url']):
+        replies.add(text='Chat alredy subscribed to that feed.', chat=chat)
+        return
+
+    db.add_fchat(chat.id, feed['url'])
+    title = d.feed.get('title') or '-'
+    desc = d.feed.get('description') or '-'
+    text = 'Title: {}\n\nURL: {}\n\nDescription: {}'.format(
+        title, feed['url'], desc)
+
+    if d.entries and feed['latest']:
+        latest = tuple(map(int, feed['latest'].split()))
+        html = format_entries(get_old_entries(d.entries, latest)[:5])
+        replies.add(text=text, html=html, chat=chat)
+    else:
+        replies.add(text=text, chat=chat)
+
+
+@simplebot.command
+def feed_unsub(payload: str, message: Message, replies: Replies) -> None:
+    """Unsubscribe current chat from the given feed.
+    """
+    url = payload
+    feed = db.get_feed(url)
+    if not feed:
+        replies.add(text='Unknow feed: {}'.format(url))
+        return
+
+    if message.chat.id not in db.get_fchats(feed['url']):
+        replies.add(
+            text='This chat is not subscribed to: {}'.format(feed['url']))
+        return
+
+    db.remove_fchat(message.chat.id, feed['url'])
+    if not db.get_fchats(feed['url']):
+        db.remove_feed(feed['url'])
+    replies.add(text='Chat unsubscribed from: {}'.format(feed['url']))
+
+
+@simplebot.command
+def feed_list(message: Message, replies: Replies) -> None:
+    """List feed subscriptions for the current chat.
+    """
+    feeds = db.get_feeds(message.chat.id)
+    text = '\n\n'.join(f['url'] for f in feeds)
+    replies.add(text=text or 'No feed subscriptions in this chat')
+
+
+def _check_feeds(bot: DeltaBot) -> None:
+    while True:
+        bot.logger.debug('Checking feeds')
+        for f in db.get_feeds():
+            try:
+                _check_feed(bot, f)
+            except Exception as err:
+                bot.logger.exception(err)
+        sleep(int(_getdefault(bot, 'delay')))
+
+
+def _check_feed(bot: DeltaBot, f: sqlite3.Row) -> None:
+    fchats = db.get_fchats(f['url'])
+
+    if not fchats:
+        db.remove_feed(f['url'])
+        return
+
+    bot.logger.debug('Checking feed: %s', f['url'])
+    process = ResultProcess(
+        target=feedparser.parse,
+        args=(f['url'],), kwargs=dict(etag=f['etag'], modified=f['modified']))
+    process.start()
+    d = process.get_result(TIMEOUT)
+
+    bozo_exception = d.get('bozo_exception', '')
+    if d.get('bozo') == 1 and not isinstance(
+            bozo_exception, CharacterEncodingOverride):
+        bot.logger.exception(bozo_exception)
+        return
+
+    if d.entries and f['latest']:
+        d.entries = get_new_entries(
+            d.entries, tuple(map(int, f['latest'].split())))
+    if not d.entries:
+        return
+
+    html = format_entries(d.entries[:50])
+    replies = Replies(bot, logger=bot.logger)
+    for gid in fchats:
+        try:
+            replies.add(html=html, chat=bot.get_chat(gid))
+        except (ValueError, AttributeError):
+            db.remove_fchat(gid)
+    replies.send_reply_messages()
+
+    latest = get_latest_date(d.entries) or f['latest']
+    modified = d.get('modified') or d.get('updated')
+    db.update_feed(f['url'], d.get('etag'), modified, latest)
+
+
+def format_entries(entries: list) -> str:
+    entries_text = []
+    for e in entries:
+        t = '<a href="{}"><h3>{}</h3></a>'.format(
+            e.get('link') or '', e.get('title') or 'NO TITLE')
+        pub_date = e.get('published')
+        if pub_date:
+            t += '<p>📆 <small><em>{}</em></small></p>'.format(pub_date)
+        desc = e.get('description') or ''
+        if not desc and e.get('content'):
+            for c in e.get('content'):
+                if c.get('type') == 'text/html':
+                    desc += c['value']
+        if desc and desc != e.get('title'):
+            t += desc
+        entries_text.append(t)
+    return '<br><hr>'.join(entries_text)
+
+
+def get_new_entries(entries: list, date: tuple) -> list:
+    new_entries = []
+    for e in entries:
+        d = e.get('published_parsed') or e.get('updated_parsed')
+        if d is not None and d > date:
+            new_entries.append(e)
+    return new_entries
+
+
+def get_old_entries(entries: list, date: tuple) -> list:
+    old_entries = []
+    for e in entries:
+        d = e.get('published_parsed') or e.get('updated_parsed')
+        if d is not None and d <= date:
+            old_entries.append(e)
+    return old_entries
+
+
+def get_latest_date(entries: list) -> Optional[str]:
+    dates = []
+    for e in entries:
+        d = e.get('published_parsed') or e.get('updated_parsed')
+        if d:
+            dates.append(d)
+    return ' '.join(map(str, max(dates))) if dates else None
+
+
+def _getdefault(bot: DeltaBot, key: str, value=None) -> str:
+    val = bot.get(key, scope=__name__)
+    if val is None and value is not None:
+        bot.set(key, value, scope=__name__)
+        val = value
+    return val
+
+
+def _get_db(bot: DeltaBot) -> DBManager:
+    path = os.path.join(os.path.dirname(bot.account.db_path), __name__)
+    if not os.path.exists(path):
+        os.makedirs(path)
+    return DBManager(os.path.join(path, 'sqlite.db'))
diff --git a/simplebot_feeds/db.py b/simplebot_feeds/db.py
new file mode 100644
index 0000000..baf215f
--- /dev/null
+++ b/simplebot_feeds/db.py
@@ -0,0 +1,91 @@
+import sqlite3
+from typing import List, Optional
+
+
+class DBManager:
+    def __init__(self, db_path: str) -> None:
+        self.db = sqlite3.connect(db_path, check_same_thread=False)
+        self.db.row_factory = sqlite3.Row
+        with self.db:
+            self.db.execute(
+                '''CREATE TABLE IF NOT EXISTS feeds
+                (url TEXT PRIMARY KEY,
+                etag TEXT,
+                modified TEXT,
+                latest TEXT)''')
+            self.db.execute(
+                '''CREATE TABLE IF NOT EXISTS fchats
+                (gid INTEGER,
+                feed TEXT REFERENCES feeds(url),
+                 PRIMARY KEY(gid, feed))''')
+
+    def execute(self, statement: str, args=()) -> sqlite3.Cursor:
+        return self.db.execute(statement, args)
+
+    def commit(self, statement: str, args=()) -> sqlite3.Cursor:
+        with self.db:
+            return self.db.execute(statement, args)
+
+    def close(self) -> None:
+        self.db.close()
+
+    # ==== feeds =====
+
+    def add_feed(self, url: str, etag: str, modified: str, latest: str) -> None:
+        url = self.normalize_url(url)
+        with self.db:
+            self.db.execute('INSERT INTO feeds VALUES (?,?,?,?)',
+                            (url, etag, modified, latest))
+
+    def remove_feed(self, url: str) -> None:
+        url = self.normalize_url(url)
+        with self.db:
+            self.db.execute('DELETE FROM fchats WHERE feed=?', (url,))
+            self.db.execute('DELETE FROM feeds WHERE url=?', (url,))
+
+    def update_feed(self, url: str, etag: Optional[str],
+                    modified: Optional[str], latest: Optional[str]) -> None:
+        url = self.normalize_url(url)
+        q = 'UPDATE feeds SET etag=?, modified=?, latest=? WHERE url=?'
+        self.commit(q, (etag, modified, latest, url))
+
+    def get_feed(self, url: str) -> Optional[sqlite3.Row]:
+        url = self.normalize_url(url)
+        return self.db.execute(
+            'SELECT * FROM feeds WHERE url=?', (url,)).fetchone()
+
+    def get_feeds(self, gid: int = None) -> List[sqlite3.Row]:
+        if gid is None:
+            return self.db.execute('SELECT * FROM feeds').fetchall()
+        rows = self.db.execute(
+            'SELECT feed FROM fchats WHERE gid=?', (gid,)).fetchall()
+        if not rows:
+            return []
+        rows = [r[0] for r in rows]
+        q = 'SELECT * FROM feeds WHERE '
+        q += ' or '.join('url=?' for r in rows)
+        return self.db.execute(q, rows).fetchall()
+
+    def add_fchat(self, gid: int, url: str) -> None:
+        url = self.normalize_url(url)
+        self.commit('INSERT INTO fchats VALUES (?,?)', (gid, url))
+
+    def remove_fchat(self, gid: int, url: str = None) -> None:
+        if url:
+            url = self.normalize_url(url)
+            self.commit(
+                'DELETE FROM fchats WHERE gid=? AND feed=?', (gid, url))
+        else:
+            self.commit('DELETE FROM fchats WHERE gid=?', (gid,))
+
+    def get_fchats(self, url: str) -> List[int]:
+        url = self.normalize_url(url)
+        rows = self.db.execute('SELECT gid FROM fchats WHERE feed=?', (url,))
+        return [r[0] for r in rows]
+
+    def normalize_url(self, url: str) -> str:
+        if not url.startswith('http'):
+            url = 'http://'+url
+        if url.endswith('/'):
+            url = url[:-1]
+        return url
diff --git a/simplebot_feeds/util.py b/simplebot_feeds/util.py
new file mode 100644
index 0000000..9308f99
--- /dev/null
+++ b/simplebot_feeds/util.py
@@ -0,0 +1,42 @@
+import queue
+from multiprocessing import Event, Process, Queue
+
+
+class AbortError(Exception):
+    """User canceled the operation."""
+
+
+class ResultProcess(Process):
+    """A process + internal queue to get target result in other process."""
+
+    def __init__(self, target, **kwargs) -> None:
+        self._real_target = target
+        self._result_queue: Queue = Queue()
+        self._failed = Event()
+        kwargs.setdefault("daemon", True)
+        super().__init__(target=self._wrapper, **kwargs)
+
+    def _wrapper(self, *args, **kwargs) -> None:
+        try:
+            self._result_queue.put(self._real_target(*args, **kwargs))
+        except BaseException as ex:
+            self._failed.set()
+            self._result_queue.put(ex)
+
+    def abort(self) -> None:
+        """Cancel process execution."""
+        self.kill()
+        self._failed.set()
+        self._result_queue.put(AbortError())
+
+    def get_result(self, timeout: float = None, kill: bool = True):
+        """Return target result."""
+        try:
+            result = self._result_queue.get(timeout=timeout)
+        except queue.Empty as ex:
+            if kill:
+                self.kill()
+            raise TimeoutError("Operation timed out.") from ex
+        if self._failed.is_set():
+            raise result
+        return result