Reddit Global Visited Links Purplization Thingy

By DEADBEEF. Last update Oct 29, 2009 — Installed 26 times. Daily Installs: 0, 2, 1, 5, 1, 0, 1, 2, 0, 1, 0, 1, 0, 0, 1, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1
Script Summary:
Install on any computers you use. Links you click on reddit will then be purplized on all computers logged into your account.

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**How it works:**

When you click a link the userscript sends your username and the link's ID to an external php script which stores it in a database.
When you load a reddit page the userscript gets a list of link IDs displayed on the page, sends them to the external php script which returns which of those links you've already visited. The userscript then styles those links accordingly.

**Notes / Limitations:**

1. Currently, the visited links database is located on a shared host. I doubt it ever will, but if tons of people start using the script I'll probably have to find someone who can donate a better host to hold the DB on.
2. The DB holds a list of usernames and links they've clicked on, that's all. For what it's worth, the usernames are hashed in the database.
3. Due to the lack of authentication it's still possible for a determined person who knows you have the script installed to get a list of links you've been to if they really wanted to.
4. Due to the same reason as above, it's also possible to feed the script a username and link ID and have the script mark that link as visited by that username.