plated

var util=require('util'); var path=require('path');

var ls=function(a) { console.log(util.inspect(a,{depth:null})); }

exports.create=async function(opts,readme){ readme=readme || {}; // allow any custom promise based file system readme.pfs=readme.pfs || (require("pify"))(require('fs'))

// force defaults if they are missing opts = opts || {}

opts.ignore=opts.ignore || {
	"node_modules":true,
	"readme.md":true,
}
opts.head=opts.head||"--[[#"
opts.foot=opts.foot||"]]"
opts.split=`

The following text is automatically extracted from other files in this directory and should not be edited here.

`

readme.setup=async function(opts)
{
	readme.plated_files=require("./plated_files.js" ).create(opts,readme)

	let plated_files=readme.plated_files
	
	let dirs={}
	for(let i=1 ; i<opts._.length ; i++) // all args are the dirs 
	{
		dirs[opts._[i]]=true
	}

	for( let busy=true ; busy ; )
	{
		busy=false // flag this if we are still finding new dirs
		for(let dir in dirs)
		{
			let files ;	try{ files=await plated_files.readdir( dir ) }catch(e){}
			for(let file of (files||[]))
			{
				if( file.startsWith(".") || opts.ignore[file] ) // ignore 
				{
				}
				else
				{
					let v=plated_files.joinpath(dir,file)
					let st ; try{ st=await plated_files.stat( v ) }catch(e){}
					if( st && plated_files.stat_isDirectory(st) )
					{
						if(!dirs[v]) // adding new
						{
							busy=true
							dirs[v]=true
						}
					}
				}
			}
		}
	}
	opts.dirs=[]
	for(let dir in dirs)
	{
		opts.dirs.push(dir)
	}

}

readme.build=async function()
{
	let pfs=readme.pfs
	let plated_files=readme.plated_files
	let dirs=[]
	for(let dir of opts.dirs)
	{

// let readme=plated_files.joinpath(dir,"readme.md") // if( await plated_files.exists(readme) ) // { dirs.push(dir) // } }

	for(let dir of dirs)
	{
		let chunks={}

		let files ;	try{ files=await plated_files.readdir( dir ) }catch(e){}
		for(let file of (files||[]))
		{
			if( file.startsWith(".") || opts.ignore[file] ) { continue } // ignore 

			let v=plated_files.joinpath(dir,file)
			let d ; try{ d=await pfs.readFileSync(v, "utf-8") }catch(e){}
			d=d || ""

			let lines=d.split("\n")
			let chunk=null
			for( let line of lines )
			{
				if(line.startsWith(opts.head))
				{
					let name=line.substr( opts.head.length ).trim()
					if( (/^[0-9a-zA-Z_\-\.]+$/).test(name) ) // valid chunk name
					{
						chunk=[]
						chunks[name]=chunk
					}
				}
				else
				if(line.startsWith(opts.foot))
				{
					chunk=null
				}
				else
				if(chunk)
				{
					chunk.push(line)
				}
			}
		}


		let readme=plated_files.joinpath(dir,"readme.md")
		let d ; try{ d=await pfs.readFile(readme, "utf-8") }catch(e){}
		d=d || ""
		let aa=d.split(opts.split)
		aa=[ aa[0] ]
		
		let names=[]
		for(let name in chunks ){ names.push(name) }
		names.sort()
		if(names.length==0){continue} // nothing to add
		
		aa.push(opts.split)
		
		for(let name of names)
		{
			let s="\n\n\n## "+name+"\n\n"+chunks[name].join("\n")
			aa.push(s)
		}
		d=aa.join("")

		console.log(readme)

		pfs.writeFile(readme,d)

	}
	

}

await readme.setup(opts);
return readme;

}