add twitter login

[dmarx]

instead of tying app to my personal twitter account, let the user login with their own. Separate scraper instances per-user w/o having to worry about rate limiting, and different users could personalize which terms they are tracking (see issue #22 ). Should transition to tweepy beforehand (issue #1 ) and so we don't need to learn twython's authorization and then rebuild with tweepy (i.e. only do this once).

[dmarx]

Looks like this will likely be non-trivial. Can't do it with tweepy, or really any reference to the twitter API. http://stackoverflow.com/a/26596791/819544

There must be some way to login via twitter and access the logged-in session in the app.

[dmarx]

• https://dev.twitter.com/web/sign-in
• https://dev.twitter.com/web/sign-in/implementing
• https://elements.heroku.com/buttons/benclauss/twitter-boilerplate
• https://pythonhosted.org/tweepy/auth_tutorial.html
• https://twittercommunity.com/t/why-cant-i-use-localhost-as-my-oauth-callback/708/31
• http://blog.miguelgrinberg.com/post/oauth-authentication-with-flask

[dmarx]

https://github.com/search?utf8=%E2%9C%93&q=flask+tweepy+get_authorization_url&type=Code&ref=searchresults

[dmarx]

For now, instead of using the fancier "callback URL" flow, just test if the session is logged in and if not, present the user with a login URL which opens in a new window and a form to enter the verification code.