From 544af1841ff27421aa241481566fa46edc7067e9 Mon Sep 17 00:00:00 2001
From: Izaya <redtailedairways@gmail.com>
Date: Sun, 17 Jun 2018 15:17:59 +1000
Subject: [PATCH] import lib and test

---
 mdparse.lua | 75 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 mdptest.lua | 13 ++++++++++
 2 files changed, 88 insertions(+)
 create mode 100644 mdparse.lua
 create mode 100644 mdptest.lua

diff --git a/mdparse.lua b/mdparse.lua
new file mode 100644
index 0000000..be2bc9a
--- /dev/null
+++ b/mdparse.lua
@@ -0,0 +1,75 @@
+local md = {}
+
+function md.parse(md)
+ local it = {}
+ it.l = {}
+ it[#it+1] = {["content"]="",["bold"]=false,["italic"]=false}
+ local lc,llc = "",""
+ local function newpart()
+  it[#it+1] = {["content"]=""}
+ end
+ newpart()
+ local lm = false
+ for c in md:gmatch(".") do
+  if c == "[" then
+   newpart()
+  elseif c == "(" and lc == "]" then
+   lm = true
+   it[#it].content = it[#it].content:sub(1,-2)
+   it[#it].address = ""
+  elseif c == ")" and lm then
+   lm = false
+   it.l[#it.l+1] = it[#it].address
+   it[#it].addrid = #it.l
+   newpart()
+  elseif c == "\n" and lc == "\n" then
+   newpart()
+   it[#it].content = "\n\n"
+   newpart()
+  else
+   if not lm then
+    it[#it].content = it[#it].content .. c
+   else
+    it[#it].address = it[#it].address .. c
+   end
+  end
+  llc = lc
+  lc = c
+ end
+ return it
+end
+
+function md.reflow(text,len)
+ local words, lines, links = {}, {""}, {}
+ for k,v in ipairs(md.parse(text)) do
+  if v.content == "\n\n" then
+   words[#words+1] = {"\n\n"}
+  elseif not v.address then
+   for word in v.content:gmatch("%S+") do
+    words[#words+1] = {word}
+   end
+  else
+   words[#words+1] = {v.content,v.address}
+  end
+ end
+ for k,v in pairs(words) do
+  if v[2] then
+   if lines[#lines]:len()+v[1]:len()+2 > len then
+    lines[#lines+1] = ""
+   end
+   links[#links+1] = {#lines, lines[#lines]:len()+1, v[2]}
+   lines[#lines] = lines[#lines] .. "<"..v[1].."> "
+  elseif v[1] == "\n\n" then
+   lines[#lines+1] = ""
+   lines[#lines+1] = ""
+  else
+   if lines[#lines]:len()+v[1]:len() > len then
+    lines[#lines+1] = ""
+   end
+   lines[#lines] = lines[#lines] .. v[1].." "
+  end
+ end
+ return lines, links
+end
+
+return md
diff --git a/mdptest.lua b/mdptest.lua
new file mode 100644
index 0000000..285534e
--- /dev/null
+++ b/mdptest.lua
@@ -0,0 +1,13 @@
+local md = require "mdparse"
+teststr = [[This is a test markdown string. It contains formatting including bold and italics, and [links](somewhere else) too.
+
+Here is a paragraph break, I suppose.
+
+Here's another. ]]
+
+lines, links = md.reflow(teststr, 40)
+print("0\t"..("1234567890"):rep(4))
+for k,v in pairs(lines) do print(k,v) end
+
+print("\nLinks:")
+for k,v in pairs(links) do print(k,v[1], v[2], v[3]) end