From d6b13eda7eb008e0a63c506064051846f32a10ed Mon Sep 17 00:00:00 2001
From: "Jason A. Donenfeld" <Jason@zx2c4.com>
Date: Wed, 19 Mar 2014 02:58:41 -0600
Subject: Steal kernel.org's libravatar lua.

---
 filters/email-libravatar-hover.lua | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 filters/email-libravatar-hover.lua

(limited to 'filters')

diff --git a/filters/email-libravatar-hover.lua b/filters/email-libravatar-hover.lua
new file mode 100644
index 0000000..c14b618
--- /dev/null
+++ b/filters/email-libravatar-hover.lua
@@ -0,0 +1,25 @@
+local digest = require("openssl.digest")
+
+function md5_hex(input)
+	local b = digest.new("md5"):final(input)
+	local x = ""
+	for i = 1, #b do
+		x = x .. string.format("%.2x", string.byte(b, i))
+	end
+	return x
+end
+
+function filter_open(email, page)
+	buffer = ""
+	hexdigest = md5_hex(email:sub(2, -2):lower())
+end
+
+function filter_close()
+	baseurl = os.getenv("HTTPS") and "https://seccdn.libravatar.org/" or "http://cdn.libravatar.org/"
+	html("<span class='libravatar'><img class='inline' src='" .. baseurl .. "avatar/" .. hexdigest .. "?s=13&amp;d=retro' /><img class='onhover' src='" .. baseurl .. "avatar/" .. hexdigest .. "?s=128&amp;d=retro' /></span>" .. buffer)
+	return 0
+end
+
+function filter_write(str)
+	buffer = buffer .. str
+end
-- 
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