From 149180683dcd8d15adb8b760363bb1e4db9c57e2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Juhani=20Krekel=C3=A4?= <juhani.haverinen@gmail.com>
Date: Sun, 1 Apr 2018 00:12:40 +0300
Subject: [PATCH] Start writing html generation

---
 generate_html.py | 97 ++++++++++++++++++++++++++++++++++++++++++++++++
 server.py        | 35 +++++++++++++----
 2 files changed, 124 insertions(+), 8 deletions(-)
 create mode 100644 generate_html.py

diff --git a/generate_html.py b/generate_html.py
new file mode 100644
index 0000000..7d14364
--- /dev/null
+++ b/generate_html.py
@@ -0,0 +1,97 @@
+import urllib.parse
+
+import bs4
+
+# generate_nav(*, soup) → nav_tag
+def generate_nav(*, soup):
+	# TODO: Don't generate link to a board if we're at the index
+	nav_tag = soup.new_tag('nav')
+
+	for board in ['a', 'b', 'his', 'g']:
+		url = '/' + urllib.parse.quote(board, safe = '') + '/'
+		a_tag = soup.new_tag('a', href = url)
+		a_tag.string = '/' + board + '/'
+		nav_tag.append(a_tag)
+
+	return nav_tag
+
+# generate_header(*, page_title, soup) → header_tag
+def generate_header(*, page_title, soup):
+	header_tag = soup.new_tag('header')
+
+	h1_tag = soup.new_tag('h1')
+	h1_tag.string = page_title
+	header_tag.append(h1_tag)
+
+	return header_tag
+
+# generate_footer(*, soup) → footer_tag
+def generate_footer(*, soup):
+	# TODO: Add footer generation
+	return soup.new_tag('footer')
+
+# page_skeleton(*, page_title, contents, soup) → html
+# Given page title (string) and contents (iteratable of beautifulsoup tags), create the html
+# Since most pages have same basic structure, it makes sense to factor this out from page creation functions
+def page_skeleton(*, page_title, contents, soup):
+	# Doctype and head are more or less the same for each page, no need to do anything fancy when adding them
+	soup.append(bs4.Doctype('html'))
+
+	head_tag = soup.new_tag('head')
+	title_tag = soup.new_tag('title')
+	title_tag.string = page_title
+	head_tag.append(title_tag)
+	soup.append(head_tag)
+
+	# Body consists of (more or less same) header and footer, and varying content
+	body_tag = soup.new_tag('body')
+
+	body_tag.append(generate_nav(soup = soup))
+	body_tag.append(generate_header(page_title = page_title, soup = soup))
+
+	# contents is an iterable that can contain several tags
+	for tag in contents:
+		body_tag.append(tag)
+
+	body_tag.append(generate_footer(soup = soup))
+
+	soup.append(body_tag)
+
+	# Use .prettify() to generate nice-looking HTML
+	# We are probably never going to serve enough pages for the additional whitespace to count for data usage
+	return soup.prettify()
+
+# new_soup() → soup
+# Since we need a soup object to create tags, split this from page_skeleton
+def new_soup():
+	# Use python's built-in parser for portability
+	# We'll be constructing the document programmatically, so start with empty tree
+	soup = bs4.BeautifulSoup('', 'html.parser')
+
+	return soup
+
+# board() → html
+# Creates the board index page
+def board(board_name):
+	# TODO: Creae a board index page
+	soup = new_soup()
+
+	page_title = '/' + board_name + '/'
+
+	return page_skeleton(page_title = page_title, contents = [], soup = soup)
+
+# index() → html
+# Create the site index
+def index():
+	# TODO: Create an index page
+	soup = new_soup()
+	return page_skeleton(page_title = 'Buranun', contents = [], soup = soup)
+
+# error_404(path) → html
+def error_404(path):
+	soup = new_soup()
+
+	p_tag = soup.new_tag('p')
+	p_tag.string = path + ' does not exist'
+
+	return page_skeleton(page_title = '404 Not Found', contents = [p_tag], soup = soup)
diff --git a/server.py b/server.py
index a7dc25f..56d90a2 100644
--- a/server.py
+++ b/server.py
@@ -1,27 +1,46 @@
 import http.server
 import urllib.parse
 
+import generate_html
+
 class HTTPRequestHandler(http.server.BaseHTTPRequestHandler):
 	server_version = 'Buranun/0.0'
 	protocol_version = 'HTTP/1.1'
 
-	def __send_plaintext(self, string):
-		if string[-1:] != '\n':
-			string += '\n'
-
-		encoded = string.encode('utf-8')
+	def __send_html(self, html, *, status_code = 200):
+		encoded = html.encode('utf-8')
 		length = len(encoded)
 
-		self.send_response(200)
-		self.send_header('Content-Type', 'text/plain; charset=utf-8')
+		self.send_response(status_code)
+		self.send_header('Content-Type', 'text/html; charset=utf-8')
 		self.send_header('Content-Length', length)
 		self.end_headers()
 
 		self.wfile.write(encoded)
 
+	def __send_404(self, path):
+		html = generate_html.error_404(path)
+		self.__send_html(html, status_code = 404)
+
 	def do_GET(self):
 		path = urllib.parse.unquote(self.path)
-		self.__send_plaintext(path)
+
+		path_components = [component for component in path.split('/') if component != '']
+
+		if len(path_components) == 0:
+			# Path of format / → index
+			html = generate_html.index()
+			self.__send_html(html)
+
+		elif len(path_components) == 1:
+			# Path of format /foo/ → board index
+			board_name = path_components[0]
+			html = generate_html.board(board_name)
+			self.__send_html(html)
+
+		else:
+			# Path not understood, send 404
+			self.__send_404(path)
 
 def main():
 	httpd = http.server.HTTPServer(('', 8000), HTTPRequestHandler)