#!/usr/bin/env lua
local sitelib = require "sitelib"
local fs = require "lfs"

print("Reading blog entries")
local mdfiles = {}
for file in fs.dir(sitelib.srcpath.."/blog/") do
 if file:sub(1,1) ~= "." then
  local index = tonumber(file:match("(%d+).md"))
  if index then
   mdfiles[index] = file
  end
 end
end

if not fs.attributes(sitelib.gopherpath) then
 fs.mkdir(sitelib.gopherpath)
end

local index=""
local itemtemplate = [[%s <item>
  <title>%s</title>
  <description>%s</description>
  <link>%s</link>
  <guid>%s</guid>
  <pubDate>%s</pubDate>
 </item>
]]
print("Generating index")
for i = #mdfiles, #mdfiles - 9, -1 do
 infile = mdfiles[i]
 local fpath = "/blog/"..infile
 local infile = sitelib.srcpath.."/blog/"..infile
 local uuid = "https://"..sitelib.hostname..(fpath:sub(1,-3)).."html"
 print(infile,fpath,uuid)
--[[
 local u = io.popen("./uuidfile.sh "..infile)
 local uuid = u:read("*a"):match("[^\n]+")
 u:close()
]]--
 local f = io.open(infile,"rb")
 local c = f:read("*a")
 f:close()
 local page = sitelib.parsepage(c)
 local fline = page.md:match("\n\n(.-)\n")
 print(fline)
 -- attempt to convert existing date to a dumb RFC 822 date
 local d = io.popen("date --date='"..page.date.."' '+%a, %d %b %Y %H:%M:00 %z'"):read("*a"):match("(.+)\n")
 index = string.format(itemtemplate,index,page.title,fline,uuid,uuid,d)
end

index=[[<?xml version="1.0" encoding="UTF-8" ?>
<rss version="2.0">
<channel>
 <title>ShadowKat Studios</title>
 <link>https://shadowkat.net</link>
 <description>ShadowKat Studios Blog Entries</description>
]]..index

local f = io.open(sitelib.outpath.."/rss.xml","wb")
f:write(index)
f:write([[</channel>
</rss>]])
f:close()