Safe link detection

[lost-in-action]

Though about using https://developers.google.com/safe-browsing to detect phishing links.

Conditions:

• When an user sends links, use Google Safe Browsing to analyze all of them. Can fetch the safe-browsing database and store it locally. Maybe fetching the database remotely every 5 minutes is good enough?
• Follow redirects (URL shorteners).
• Maybe avoid analyzing links to popular websites like twitter.com, github.com and many populars (whitelist).
• (?) Filter application links, as an option (for example ms-cxh-full://0 when executed, opens a black window covering the screen, hard to eliminate).
• (?) Deep analysis. For example, fetch the remote link, if it contains content related to trading a CS:GO item, and it's not in the real steam community website. Same for Discord gifts, those are pretty common, so maybe it's worth implementing.
• (??) Analyze exe files, maybe using VirusTotal? (This condition is really intensive), or maybe prevent any scripts/executables to be sent? (as an option, it would be good)

NOTE: When fetching a remote website (for deep analysis), it should be better to use a legit user-agent (Chrome, Firefox), because some scam sites attempt to detect bots from user-agent and blacklist them