make a python script to be automatically executed.

Doc
https://developers.facebook.com/docs/pages/publishing

Create an app, a token, and permissions for the bot
https://developers.facebook.com/

Page under test
https://www.facebook.com/HBY-bot-427810290948882/

When posting a weather or a page news report, send page admin a copy (at least the link to the report).

Tutorial of building msg bot

https://medium.com/voice-tech-podcast/how-to-build-messenger-chatbot-in-python-flask-and-heroku-5053c9e5d9bb

https://hackernoon.com/beginners-guide-simple-chat-bot-fb-based-on-flask-and-heroku-2g7v32ab

For now, a free worker dyno is used by this app, and it cannot provide service through out a month once the free quota is consumed.

[Ref] https://devcenter.heroku.com/articles/free-dyno-hours#dyno-sleeping
A heroku worker would sleep if the dyno receives no web traffic in a 30-minute period.
Apps that only utilise a free worker dyno do not sleep, because they do not respond to web requests.
Free web dynos do not consume free dyno hours while sleeping.

Possible solution: heroku clock
https://devcenter.heroku.com/articles/clock-processes-python

• separate api tokens, keys, pw from config.py
• rename config.py to config_reporter.py
• update examples accordingly
• move config files to "conf" folder
• move collectors of news, weather and pic to 'collector' folder
• move log to 'log' folder

No news is reported, only pre-defined messages.

This may not be a problem since the pages really have no posts at 00:00~0700.

Periodical Report

report weather

• locations: Taipei and Tainan
• weather info: temperature, wind, etc.
• report time:
  • current weather at 0700, 1200, 1700
  • report forecast at 2200

report news

• collects news of fb pages (group and fan pages)
• report time: 0700, 1200, 1700, 2200
• news info:
  • short description, time of post, url
  • classify news by types
• a 0700 news reports posts created at 2200 ~ 0700
• a 1200 news reports posts created at 0700 ~1200
• a 1800 news reports posts created at 1200 ~1800
• a 2200 news reports posts created at 1800 ~ 2200

• the post event (weather, news...)
  • the id of post
  • error message

fix time checking in fb news collector.

datetime.today().date() returns date of the machine.

For a user residents in a time zone different from the machine, the user may get news create in yesterday.
For example, a machine is in UTC+0, a user is in UTC+8, and a news is created in 2020-11-30 08:00:01 in UTC+8, the date of the news is considered as 'today' by the machine but not by the user.

Concurrent Report

• When posting a weather or a page news report, send page admin a copy
• at least the link to the report since msg length has limitation

On-Demand Report

A User is messaging with the Bot.

Use case: report weather

1. Bot provides report categories (news, weather, pic)
2. A User selects weather
3. Bot reports "current weather"

Use case: report news

1. Bot provides report categories (news, weather, pic)
2. A User selects news
3. Bot provides types of news as listed in config file
4. A User selects a news type
5. Bot reports news of that type

Use case: report pic

1. Bot provides report categories (news, weather, pic)
2. A User selects pic
3. Bot reports recommended pic

The current scheduling mechanism is not good enough.
The script follows time zone used by the deployed machine.

https://github.com/upbit/pixivpy

https://github.com/akameco/pixiv-app-api

https://pixiv-api.readthedocs.io/en/latest

https://github.com/Mikubill/pixivpy-async

ref: https://www.digitalocean.com/community/tutorials/how-to-use-the-pathlib-module-to-manipulate-filesystem-paths-in-python-3

Error message: This message is sent outside of allowed window

network request/post analysis
https://tlyu0419.github.io/2020/03/17/Crawl-Facebook-Pages/
tlyu0419/TLYu0419.github.io#15