local Luan = require "luan:Luan.luan"
local error = Luan.error
local pairs = Luan.pairs or error()
local Io = require "luan:Io.luan"
local Http = require "luan:http/Http.luan"
local Shared = require "site:/lib/Shared.luan"
local head = Shared.head or error()
local header = Shared.header or error()


local content = {
	intro = {
		title = [[Introduction]]
		content = function()
%>
<p>Learning reactionary programming will give you a deep understanding of programming and will enable to you to write your own programs and websites.  However this is not enough to get a job with modern scum (members of depraved modern culture).  Modern scum will expect you to use tools popular with them, so you would have to learn one of those.  Probably the least horrible programming tool used by modern scum is <a href="python.html">Python</a>, so I would recommend learning that if you want a job.</p>

<p>The next 4 lessons are basic computer literacy.  Even if you are not interested in programming, these would be useful skills.</p>

<p>I will develop this course incrementally based on demand.  Whenever anyone completes the content here, I will add another lesson/section.  This way I won't waste my time writing content that no one will use.</p>

<p>This course will be designed for you to learn reactionary programming in a logical sequence.  I will focus on finding relevant resources, and I will only write explanations when nothing else is available on the subject.  I will focus on web development since that is what I know best.</p>

<p>I will often say "Do X" without saying how to do X.  A big part of programming is figuring out how to do things.  Your two main resources are Google and ChatGPT.  If you get stuck, you can ask me.</p>

<p>ChatGPT has become an essential programming tool.  So the only task for this lesson is to play with ChatGPT.  Later you can ask it technical questions.</p>

<p>If you have any questions, you can <a href="https://discord.gg/R6A3kaAJwj">ask me on Discord</a>.</p>
<%
		end
	}
	editor = {
		title = [[Text Editor and JSON]]
		content = function()
%>
<p>A text editor is a basic tool for reactionary programmers.  We use simple flexible tools.  Modern scum use an <a href="https://en.wikipedia.org/wiki/Integrated_development_environment">IDE</a> which is big, <a href="https://mikraite.arkian.net/Changed-my-mind-about-IDE-s-tp2769.html">complicated</a>, and inflexible.  We don't use such tools.</p>

<p>I reviewed the available text editors and I think <a href="https://www.sublimetext.com/">Sublime Text</a> is the best one available.  So please download it and learn how it works.</p>

<p><a href="https://en.wikipedia.org/wiki/JSON">JSON</a> is the most popular text data format.  I think JSON was the last good programming idea from modern culture, developed around 2001, before modern culture became fully depraved.  Do your own research on JSON to understand it.  It is fairly simple.</p>

<p>I paired Sublime Text with JSON because Sublime Text uses JSON files for its <a href="https://www.sublimetext.com/docs/settings.html">settings</a>.  (Actually not quite pure JSON because it includes comments which are lines starting with <code>//</code>.)  Experiment with Sublime Text settings to learn more about both Sublime Text and JSON.</p>
<%
		end
	}
	bash = {
		title = [[Bash - Command Line Shell]]
		content = function()
%>
<p><a href="bash.html">Bash</a> is the other basic tool for reactionary programmers.  I was hoping to just reference existing Bash tutorials in this lesson, but they are all horrible, so I am writing my own.  So for this lesson, please read <a href="learn_bash.html">my tutorial</a>.</p>
<%
		end
	}
	regex = {
		title = [[Regular Expressions]]
		content = function()
%>
<p><a href="https://en.wikipedia.org/wiki/Regular_expression">Regular expressions</a>, or regex for short, are used for searching or matching text.  Since this is such a common need, regex are found everywhere in programming.  Since you just learned Bash, you can learn regex with the <a href="https://en.wikipedia.org/wiki/Grep">grep</a> command that uses regex.</p>

<p>Unlike with Bash, there are a few decent grep tutorials, so I don't have to write my own.  Here they are:</p>

<ul>
<li><a href="https://vegastack.com/tutorials/regular-expressions-in-grep/">Regular Expressions in Grep</a></li>
<li><a href="https://cs.nyu.edu/~mohri/unix08/lect4">Regular Expressions</a></li>
<li><a href="https://www.gnu.org/software/grep/manual/grep.html">GNU Grep</a></li>
</ul>

<p>I suggest that you just read through these tutorials so that you get a sense for how regex and grep work.  You don't need to practice anything here.  You can come back to these tutorials later when you have a real need for regex or grep.</p>

<p>If you become a serious programmer, then you should have a deeper understanding of regex.  In that case I recommend the book <a href="https://www.amazon.com/Mastering-Regular-Expressions-Jeffrey-Friedl/dp/0596528124/">Mastering Regular Expressions</a>.</p>
<%
		end
	}
	hg = {
		title = [[Mercurial - Source Control]]
		content = function()
%>
<p>Thankfully <a href="mercurial.html">Mercurial</a> is well documented.  Read <a href="https://hgbook.red-bean.com/">Mercurial: The Definitive Guide</a> up to (and including) chapter 9.</p>

<p>To get started with Mercurial, download Mercurial from <a href="https://www.mercurial-scm.org/">their website</a> and install it.  Then do:</p>

<code block>
~/learn $ hg version
Mercurial Distributed SCM (version 5.2.2)
(see https://mercurial-scm.org for more information)

Copyright (C) 2005-2019 Matt Mackall and others
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
~/learn $ 
</code>

<p>If this works, it is installed properly.  Next <a href="https://hgbook.red-bean.com/read/a-tour-of-mercurial-the-basics.html#sec:tour-basic:username">set up your Mercurial configuration file</a> which is <code>~/.hgrc</code> on a Mac or <code>/c/Users/$(whoami)/mercurial.ini</code> on Windows <a href="https://www.msys2.org/">MSYS2</a>.  My <a href="https://www.mercurial-scm.org/doc/hgrc.5.html">hgrc</a> file looks like this:

<code block>
[ui]
username = Franklin Schmidt <fschmidt@gmail.com>

[auth]
hghosting.prefix = https://hg.reactionary.software/repo/
hghosting.username = fschmidt@gmail.com
hghosting.password = xxxxxxxxxx

[extensions]
hgext.extdiff =

[extdiff]
cmd.dm = diffmerge
</code>

<p>You should register on <a href="https://hg.reactionary.software/">our Mercurial hosting service</a> and use your email as the username and the assigned password in <code>.hgrc</code>.  The last two blocks set up <code>hg dm</code> to call <a href="https://sourcegear.com/diffmerge/">DiffMerge</a> by using the <a href="https://wiki.mercurial-scm.org/ExtdiffExtension">Extdiff extension</a>.</p>

<p>Now you can play with <a href="https://hg.reactionary.software/repo/test/">https://hg.reactionary.software/repo/test/</a> like this:</p>

<code block>
~/learn $ hg clone https://hg.reactionary.software/repo/test/ hgtest1
no changes found
updating to branch default
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
~/learn $ hg clone https://hg.reactionary.software/repo/test/ hgtest2
no changes found
updating to branch default
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
~/learn $ ls -Fd h*
hgtest1/	hgtest2/
~/learn $ cd hgtest1
~/learn/hgtest1 $ touch file.txt
~/learn/hgtest1 $ e file.txt 
~/learn/hgtest1 $ cat file.txt 
some text
~/learn/hgtest1 $ hg status
? file.txt
~/learn/hgtest1 $ hg add file.txt 
~/learn/hgtest1 $ hg status
A file.txt
~/learn/hgtest1 $ hg pull
pulling from https://hg.reactionary.software/repo/test/
no changes found
~/learn/hgtest1 $ hg commit -m 'add file.txt'
~/learn/hgtest1 $ hg push
pushing to https://hg.reactionary.software/repo/test/
searching for changes
remote: adding changesets
remote: adding manifests
remote: adding file changes
remote: added 1 changesets with 1 changes to 1 files
~/learn/hgtest1 $ cd ../hgtest2
~/learn/hgtest2 $ hg pull
pulling from https://hg.reactionary.software/repo/test/
requesting all changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files
new changesets aab34516d8dc
(run 'hg update' to get a working copy)
~/learn/hgtest2 $ hg update
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
~/learn/hgtest2 $ hg status
~/learn/hgtest2 $ cat file.txt 
some text
~/learn/hgtest2 $ e file.txt 
~/learn/hgtest2 $ cat file.txt 
some text
and more
~/learn/hgtest2 $ hg status
M file.txt
~/learn/hgtest2 $ hg pull
pulling from https://hg.reactionary.software/repo/test/
searching for changes
no changes found
~/learn/hgtest2 $ hg dm
~/learn/hgtest2 $ hg commit -m 'and more'
~/learn/hgtest2 $ hg push
pushing to https://hg.reactionary.software/repo/test/
searching for changes
remote: adding changesets
remote: adding manifests
remote: adding file changes
remote: added 1 changesets with 1 changes to 1 files
</code>

<%
		end
	}
	html = {
		title = [[HTML and CSS]]
		content = function()
%>
<p>Google Chrome is the standard client-side web development tool.  So the first step is to make sure that you have Chrome installed and running.</p>

<p>Using Chrome, on any page you can right-click in an empty area and from the menu select "View Page Source".  This will show you the HTML for the webpage.  If you try this on different websites, you will probably notice that my webpages are fairly short and well organized while the webpages of modern scum are unreadable.  Another thing to try is to right-click anywhere in a page and select "Inspect".  This should open the developer tools with the tab "Elements" selected.  In this tab, you get the HTML organized as a tree that can be expanded to collapsed.  The "Elements" tab of Chrome developer tools will be your core tool when you work with HTML and CSS.  You should play with it and do your own research on it to learn how it works.</p>

<p>The next step is to download this website like this:</p>

<code block>
~/learn $ wget -r -k https://www.reactionary.software/
--2024-01-15 01:31:20--  https://www.reactionary.software/
...
~/learn $ cd www.reactionary.software/
~/learn/www.reactionary.software $ ls -F
about.html		hg_dev.html		mercurial.html
bash.html		index.html		needed.html
books.html		java.html		nginx.html
discussion.html		java_fork.html		python.html
existing.html		learn.html		site.css
external_link.svg	learn_bash.html		this.html
freedit.html		lucene.html		wysiwyg.html
</code>

<p><code>index.html</code> is the home page.  Find it in Mac Finder or Windows File Explorer, and then drag-and-drop it into Chrome.  You should see this website.  You can open the files in a text editor to see the HTML.  And you can edit these files to see how the web page changes.</p>

<p>There is good documentation on HTML and CSS.  Start with <a href="https://www.amazon.com/Cascading-Style-Sheets-Designing-Web/dp/0321193121/">Cascading Style Sheets: Designing for the Web</a>.  This was written by the people who invented CSS and explains the core idea.  Read the whole book.  This book covers almost everything in this website.  The only missing piece is <a href="https://css-tricks.com/snippets/css/a-guide-to-flexbox/">flexbox</a>.  Next get <a href="https://www.amazon.com/CSS-Definitive-Guide-Layout-Presentation/dp/1098117611/">CSS: The Definitive Guide</a>.  You should also read this whole book, but you can do it slowly as you work with CSS.  You don't need to read this book right now, you can wait until you have finished the next two lessons.</p>

<p>Just play with HTML and CSS until you get a basic understanding of how they work.  You should be able to understand the HTML and CSS of this website.</p>

<p>I left out resources for HTML itself.  You should just look up HTML tags with Google or ChatGPT as you encounter them.  That is good enough to learn HTML.</p>

<p>Ideally one should be able to look at web pages around the internet to learn.  But unfortunately they are mostly overcomplicated crap that is very difficult to understand.  You can try.  My personal websites are like this one - very simple, so they don't look professional to modern scum.  I can't link to my best commercial website because that would ruin its reputation (because I am infamous).  But I can link to some of my old commercial websites <a href="http://test.tleggings.com/">here</a> and <a href="http://test.super-resume.com/">here</a>.  These have reasonable HTML and CSS.</p>

<p>I have a few general principles for working with HTML and CSS.  First, modern scum claim that HTML is for content and CSS is for styling.  This is nonsense.  Both HTML and CSS are for layout, don't think of them as being conceptually different.  Just use both in the simplest possible way to get the results you want.  Don't bother with the useless new HTML5 content tags like <code>header</code>.  Just use <code>div</code> and <code>span</code> for most things.  Also I use HTML attributes as selectors, not HTML classes.  This is just simpler.  HTML classes are useless, leave them for modern scum.</p>

<p>You will need HTML, CSS, Javascript, and Luan to make a website.  So I suggest that you get a basic understanding of each of these and then go back later to study them in greater depth.</p>
<%
		end
	}
	js = {
		title = [[JavaScript]]
		content = function()
%>
<p>later</p>
<%
		end
	}
	luan = {
		title = [[Luan]]
		content = function()
%>
<p>later</p>
<%
		end
	}
	http = {
		title = [[HTTP]]
		content = function()
%>
<p>later</p>
<%
		end
	}
	java = {
		title = [[Java 8]]
		content = function()
%>
<p>later</p>
<%
		end
	}
	lucene = {
		title = [[Lucene]]
		content = function()
%>
<p>later</p>
<%
		end
	}
}


local function show_toc(content)
%>
			<ul>
<%
	for id, info in pairs(content) do
%>
				<li><a id="c_<%=id%>" href="#<%=id%>"><%=info.title%></a></li>
<%
	end
%>
			</ul>
<%
end

local function show_content(content,h)
	for id, info in pairs(content) do
%>
			<div heading>
				<h<%=h%>><a id="<%=id%>" href="#<%=id%>"><%=info.title%></a></h<%=h%>>
				<a href="#c_<%=id%>">contents</a>
			</div>
<%
		info.content()
	end
end

return function()
	Io.stdout = Http.response.text_writer()
%>
<!doctype html>
<html>
	<head>
<%		head() %>
		<title>Learn Reactionary Programming</title>
	</head>
	<body>
<%		header() %>
		<div content>
			<h1><a href="learn.html">Learn Reactionary Programming</a></h1>
			<hr>
			<h2>Contents</h2>
			<div toc>
<%			show_toc(content) %>
			</div>
			<hr>
<%			show_content(content,2) %>
		</div>
	</body>
</html>
<%
end