Chapter 6 & 7 revamp (#22)

* cleanup some code

* rename dir

* clean up code

* minor corrections to text

* rename dir

* chapters 6 & 7 revamped

* rename exercise 2 folder

* revamp newsbot

* update compose files

Author: SathyaBhat

source-code/chapter-5/exercise-2/newsbot/telegram.py

@@ -98,7 +98,7 @@ def handle_incoming_messages(last_updated):
                     summarized_news = get_latest_news(sub_reddits)
                     post_message(person_id, summarized_news)
                 except peewee.DoesNotExist:
-                    post_message(person_id, 'Could not find a saved subreddit, please try setting sources with /source')
+                    post_message(person_id, ERR_NO_SOURCE)
 
             last_updated = req['update_id']
             with open('last_updated.txt', 'w') as f:

source-code/chapter-6/exercise-1/docker-subreddit-fetcher-network/Dockerfile

@@ -0,0 +1,9 @@
+FROM python:3-alpine
+
+RUN apk add gcc musl-dev python3-dev libffi-dev openssl-dev cargo
+WORKDIR /apps/subredditfetcher/
+COPY . .
+
+RUN pip install --upgrade pip && pip install -r requirements.txt
+VOLUME ["/data"]
+CMD ["python", "newsbot.py"]

source-code/chapter-6/exercise-1/docker-subreddit-fetcher-network/constants.py

@@ -0,0 +1,15 @@
+__author__ = 'Sathyajith'
+
+from os import environ
+from sys import exit
+ERR_NO_SOURCE = 'No sources defined! Set a source using /source list, of, sub, reddits'
+skip_list = []
+sources_dict = {}
+UPDATE_PERIOD = 1
+FALSE_RESPONSE = {"ok": False}
+
+BOT_KEY = environ.get('NBT_ACCESS_TOKEN')
+if not BOT_KEY:
+    print("Telegram access token not set, exiting.")
+    exit(1)
+API_BASE = f'https://api.telegram.org/bot{BOT_KEY}'