1 files changed, 23 insertions, 0 deletions
diff --git a/server-katex/filter.lua b/server-katex/filter.lua
new file mode 100644
index 0000000..1010217
--- /dev/null
+++ b/server-katex/filter.lua
@@ -0,0 +1,23 @@
+function Pandoc(doc)
+    local tmp_name = os.tmpname()
+    local math = assert(io.popen("deno run server-katex/math.ts > " .. tmp_name, "w"))
+    doc:walk({
+        Math = function(el)
+			if el.mathtype == 'DisplayMath' then
+				assert(math:write("d" .. el.text:gsub("\n", " ") .. "\n"))
+			else
+				assert(math:write("i" .. el.text:gsub("\n", " ") .. "\n"))
+			end
+        end
+    })
+    math:close()
+    local tmp = assert(io.open(tmp_name, "r"))
+    doc = doc:walk({
+        Math = function(el)
+			return pandoc.RawInline(FORMAT, tmp:read())
+        end
+	})
+    tmp:close()
+    os.remove(tmp_name)
+    return doc
+end