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-rw-r--r--filters/email-libravatar-hover.lua25
1 files changed, 25 insertions, 0 deletions
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