1 files changed, 56 insertions, 0 deletions
diff --git a/image/filters/email-libravatar.lua b/image/filters/email-libravatar.lua
new file mode 100644
index 0000000..5e8554e
--- /dev/null
+++ b/image/filters/email-libravatar.lua
@@ -0,0 +1,56 @@
+-- This script may be used with the email-filter or repo.email-filter settings in cgitrc.
+-- It adds libravatar icons to author names. It is designed to be used with the lua:
+-- prefix in filters.
+--
+-- Requirements:
+--      luaossl
+--      <http://25thandclement.com/~william/projects/luaossl.html>
+--
+
+local digest = require('openssl.digest')
+
+function sha256_hex(input)
+  local b = digest.new('sha256'):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 = ''
+  sha256 = sha256_hex(email:sub(2, -2):lower())
+end
+
+function filter_close()
+  baseurl = not os.getenv('FORCE_HTTP') and 'https://seccdn.libravatar.org/' or 'http://cdn.libravatar.org/'
+  local url = baseurl .. 'avatar/' .. sha256 .. '?d=retro&amp;s='
+  local rng = tostring(math.random(0, 10000000))
+  -- very bad email obfuscation
+  html(
+    '<a class=\'e-'
+      .. sha256
+      .. '\' id=\'e-'
+      .. rng
+      .. '\'><span class="libravatar-avatar"><img src=\''
+      .. url
+      .. '128\' class="always-visible" alt=\'Libravatar\' /><img src=\''
+      .. url
+      .. '1024\' class=\'on-hover\' alt=\'Large Libravatar\' /></span> '
+      .. buffer:gsub('@', '<span class="theattening"></span>'):gsub('%.', '<span class="thedottening"></span>')
+      .. '</a>'
+      .. (
+        math.random(0, 1000) < 777
+          and '<script id="j-' .. rng .. '">(()=>{const _=' .. (math.random(0, 100) > 50 and 'setTimeout' or 'setInterval') .. '(()=>{const a=document.querySelector(\'#e-' .. rng .. '.e-' .. sha256 .. '\');a.removeAttribute(\'id\');const b = a.querySelector(".theattening");if(b){b.outerHTML+="<span style=\'display:inline-flex;flex-direction:row-reverse;width:0;height:0;opacity:0;\'><span>a</span><span>t</span></span>";a.querySelector(".thedottening").outerHTML=String.fromCharCode(("http://").charCodeAt(5) - 1);};document.querySelector("#j-' .. rng .. '").remove();try{clearInterval(_);}catch(e){}},' .. tostring(
+            math.random(0, 1000)
+          ) .. ')})()</script>'
+        or ''
+      )
+  )
+  return 0
+end
+
+function filter_write(str)
+  buffer = buffer .. str
+end