skeksis/lib/skeksis.rb

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# frozen_string_literal: true
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require "yaml"
require "tree"
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require_relative "skeksis/version"
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require_relative "skeksis/parser"
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require_relative "skeksis/htmlize"
module Skeksis
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#class Error < StandardError; end
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Header = <<~HTML
<!DOCTYPE html>
<html lang="en">
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<head>
<title>Gembridge</title>
<style>
h1,h2,h3,h4,h5,h6 {
color: #2e3440;
}
a {
color: #434c5e;
}
a:visited {
color: #4c566a;
}
</style>
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</head>
<body>
<h1>Directory Listing</h1>
HTML
Footer = <<~HTML
</body>
</html>
HTML
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class GemBridge
def initialize
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config = YAML.load(File.read("config.yml"))
@gemini_uri = config['skeksis_config']['gemini_uri']
@serve_dir = config['skeksis_config']['serve_dir']
@allowlist = Tree::TreeNode.new("ROOT", false)
build_allowlist(@allowlist, @serve_dir)
puts @allowlist.to_h
end
def build_allowlist(tree, path)
Dir.each_child(path) do |child|
full_path = Pathname.new(path).join(child)
if child == ".serve_ok"
tree.content = true
end
serve_ok = false
if Dir.exist?(full_path)
Dir.each_child(full_path) do |subchild|
if subchild == ".serve_ok"
serve_ok = true
end
end
child_node = Tree::TreeNode.new(child, serve_ok)
tree << child_node
end
end
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end
def query(path, env)
query_path = Pathname.new(path).each_filename.to_a
@allowlist.children do |child|
if child.name == query_path[0] and child.content == false
return nil
end
end
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# Chomps the first / and builds path
full_path = Pathname.new(@serve_dir) + path[1..-1]
puts full_path.to_s
if Dir.exist?(full_path)
index_file = full_path + "index.gmi"
if File.exist?(index_file)
data = File.open(index_file, 'r').readlines
[htmlize(data, env)]
else
create_dir_listing(full_path, env)
end
elsif File.exist?(full_path)
file = File.open(full_path, 'r')
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data = file.readlines
[htmlize(data, env)]
else # path is invalid
return nil
end
end
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def htmlize(data, env)
Skeksis::Parser.parse(data, strip_blanks=true).htmlize(env['REQUEST_URI'], @gemini_uri)
end
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private
def load_style
"<script type=\"text/css\">" +
File.open("style/nord.css", 'r').readlines.join("\n") +
"</script>"
end
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def create_dir_listing(path, env)
http = URI.parse(env['REQUEST_URI'])
unless Dir.each_child(path).include?('.directory-listing-ok')
return nil
end
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listing = Dir.each_child(path).map do |i|
if i == ".directory-listing-ok" or i == ".serve_ok"
next
end
child_path = Pathname.new(path).join(i)
puts child_path
if Dir.exist?(child_path) and not Dir.each_child(child_path).include?('.serve_ok')
next
end
uri_path = Pathname.new(env['PATH_INFO']).join(i)
uri = URI::HTTP.build(host: http.host, port: http.port, path: uri_path.to_s)
"<a href=\"#{uri.to_s}\">#{i}</a><br>"
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end.join("\n")
[Header + listing + Footer]
end
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end
end