feat: add RSS feed

src/feed.rss.cgt

@@ -0,0 +1,72 @@
+<!
+    local months = {
+        "Jan", "Feb", "Mar", "Apr", "May", "Jun",
+        "Jul", "Aug", "Sep", "Oct", "Nov", "Dec",
+    }
+
+    -- Implementation of John Conway's Doomsday algorithm due to retarded date specs used in RSS
+    -- Written in collaboration with stack overflow. Don't ask me WTF is going on here
+    function dayOfWeek(gd, gm, gy)
+        local d
+        local by, a = 20, 0
+        local y = { 6, 4, 2, 0 }
+        local m = { 0, 3, 3, 6, 1, 4, 6, 2, 5, 0, 3, 5 }
+        local wd = { "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" }
+
+        local ym = gy % 100
+        local yp = math.floor(ym / 4)
+        local ay = math.floor(gy / 100)
+
+        while ay ~= by do
+            by = by + 1
+            a = a + 1
+
+            if a == 4 then
+                a = 0
+            end
+        end
+
+        if ym % 4 == 0 and gm == 2 then
+            d = (gd + m[gm] + ym + yp + y[a + 1] - 1) % 7
+        else
+            d = (gd + m[gm] + ym + yp + y[a + 1]) % 7
+        end
+
+        return wd[d + 1]
+    end
+
+    function xmlEscape(s)
+        local map = {
+            ["<"] = "&lt;",
+            [">"] = "&gt;",
+            ["&"] = "&amp;",
+        }
+
+        return string.gsub(s, "(.)", function(c)
+            return map[c] or c
+        end)
+    end
+!><?xml version="1.0" encoding="UTF-8"?>
+<rss version="2.0">
+<channel>
+    <title>LordMZTE's Blog</title>
+    <description>A Repository of a nerd's thoughts and oppinions</description>
+    <link>https://mzte.de</link>
+    <copyright>no lol</copyright>
+    <generator>Confgen</generator>
+
+    <! for i = #opt.articles, 1, -1 do
+        local a = opt.articles[i]
+        local year_s, month_s, day_s = string.match(a.date, "(%d+)-(%d+)-(%d+)")
+        local year, month, day = tonumber(year_s), tonumber(month_s), tonumber(day_s)
+    !>
+    <item>
+        <title><% xmlEscape(a.title) %></title>
+        <description><% xmlEscape(a.summary) %></description>
+        <link>https://mzte.de/a/<% a.id %>/</link>
+        <pubDate><% dayOfWeek(day, month, year) %>, <% day %> <% months[month] %> <% year %> 00:00:00 +0000</pubDate>
+        <! -- TODO: set `category` field with tags !>
+    </item>
+    <! end !>
+</channel>
+</rss>

src/index.html.cgt

@@ -48,6 +48,7 @@ If you want to chat, you can also reach me on matrix (`@lordmzte:mzte.de`).
     </div>
 
     <h1>Articles</h1>
+    <a href="/feed.rss">[RSS Feed]</a>
     <hr />
     <div id="articles">
     </div>