module Shere

# File lib/shere.rb, line 59
  def nginx_config root, port, host, user, tmpdir=Dir.mktmpdir
    if user
      if root_privilege?
        "user  #{user};\n"
      else
        puts "\e[31m[WARN] Since you don't have root privilege,"
        puts "       switching user to `#{user}' is not possible.\e[0m"
        ''
      end
    else
      ''
    end + <<~NGINX
      worker_processes  2;

      error_log  #{tmpdir}/nginx_error.log;
      pid        #{tmpdir}/nginx.pid;

      events {
        worker_connections  1024;
      }

      http {
        #{nginx_mime_types}

        default_type  application/octet-stream;

        log_format  main  '$remote_addr - $remote_user [$time_local] $request '
                          '"$status" $body_bytes_sent "$http_referer" '
                          '"$http_user_agent" "$http_x_forwarded_for"';

        access_log                   #{tmpdir}/nginx_access.log  main;

        fastcgi_temp_path            #{tmpdir}/fcgi_temp;
        client_body_temp_path        #{tmpdir}/client_body 1 2;
        proxy_temp_path              #{tmpdir}/proxy_temp;

        client_header_timeout        10m;
        client_body_timeout          10m;
        send_timeout                 10m;

        connection_pool_size         256;
        client_header_buffer_size    1k;
        large_client_header_buffers  4 2k;
        request_pool_size            4k;

        output_buffers               1 32k;
        postpone_output              1460;

        sendfile                     on;
        tcp_nopush                   on;
        tcp_nodelay                  on;

        keepalive_timeout            75 20;
        ignore_invalid_headers       on;

        gzip                         on;
        gzip_min_length              1100;
        gzip_buffers                 4 8k;
        gzip_types                   text/plain text/css application/xhtml+xml application/javascript;

        server {
          listen       #{port};
          server_name  #{host};
          index        index.xhtml index.html index.htm;

          location / {
            root       "#{root}";
            autoindex  on;
          }
        }
      }
    NGINX
  end

# File lib/shere.rb, line 133
  def nginx_mime_types
    <<~NGINX
      types {
        # text
        text/plain                            txt;
        text/html                             html htm shtml;
        text/css                              css;
        text/xml                              xml;

        # images
        image/gif                             gif;
        image/jpeg                            jpeg jpg;
        image/png                             png;
        image/tiff                            tif tiff;
        image/vnd.microsoft.icon              ico;

        # common application
        application/atom+xml                  atom;
        application/rss+xml                   rss;
        application/xhtml+xml                 xhtml;

        application/javascript                js;
        application/postscript                ps eps ai;
        application/rtf                       rtf;

        application/x-shockwave-flash         swf;
        application/pdf                       pdf;
        application/java-archive              jar war ear;

        application/zip                       zip;
        application/x-gzip                    gz;
        application/x-tar                     tar;
        application/x-rar-compressed          rar;

        application/vnd.mozilla.xul+xml       xul;
        application/msword                    doc;
        application/vnd.ms-excel              xls;
        application/vnd.ms-powerpoint         ppt;

        # audio
        audio/midi                            mid midi kar;
        audio/mpeg                            mp3;
        audio/ogg                             ogg;
        audio/aac                             m4a;

        audio/vnd.rn-realaudio                ra;

        audio/x-wav                           wav;
        audio/x-ms-wma                        wma;

        # video
        video/mpeg                            mpeg mpg;
        video/quicktime                       mov;
        video/mp4                             mp4;

        video/x-ms-wmv                        wmv;
        video/x-ms-asf                        asx asf;
        video/x-aif                           aif aiff aifc;
        video/x-msvideo                       avi;

        # others
        text/mathml                           mml;
        text/vnd.sun.j2me.app-descriptor      jad;
        text/vnd.wap.wml                      wml;
        text/x-component                      htc;

        image/x-portable-pixmap               ppm;
        image/x-portable-graymap              pgm;
        image/x-portable-bitmap               pbm;
        image/x-portable-anymap               pnm;
        image/x-xwindowdump                   xwd;
        image/x-xpixmap                       xpm;
        image/x-xbitmap                       xbm;

        image/vnd.wap.wbmp                    wbmp;
        image/x-jng                           jng;
        image/x-ms-bmp                        bmp;

        video/3gpp                            3gpp 3gp;
        video/x-flv                           flv;
        video/x-mng                           mng;

        application/mac-binhex40              hqx;
        application/vnd.wap.wmlc              wmlc;

        application/x-cocoa                   cco;
        application/x-java-archive-diff       jardiff;
        application/x-java-jnlp-file          jnlp;
        application/x-makeself                run;
        application/x-perl                    pl pm;
        application/x-pilot                   prc pdb;

        application/x-redhat-package-manager  rpm;
        application/x-sea                     sea;
        application/x-stuffit                 sit;
        application/x-tcl                     tcl tk;
        application/x-x509-ca-cert            der pem crt;
        application/x-xpinstall               xpi;

        application/octet-stream              bin exe dll;
        application/octet-stream              deb;
        application/octet-stream              dmg;
        application/octet-stream              eot;
        application/octet-stream              iso img;
        application/octet-stream              msi msp msm;
      }
    NGINX
  end

# File lib/shere.rb, line 49
def root_privilege?
  require 'etc'
  Etc.getpwuid(Process.uid).name == 'root'
end

# File lib/shere.rb, line 29
def run opts={}
  root = File.expand_path(opts[:root] || '.')
  port = opts[:port] || 4331
  host = opts[:host] || '_'
  user = opts[:user]

  require 'tmpdir'
  tmpdir = Dir.mktmpdir('shere-')
  File.open("#{tmpdir}/nginx.conf", 'w'){ |conf|
    conf.puts(nginx_config(root, port, host, user, tmpdir))
  }
  sh('nginx', '-c', "#{tmpdir}/nginx.conf")
  puts("PID: #{File.read("#{tmpdir}/nginx.pid")}")

  address = ExternalAddress.new

  puts("http://#{address.ip_address}:#{port}" \
       " or http://#{address.reverse_lookup_host}:#{port}")
end

# File lib/shere.rb, line 54
def sh *commands
  puts commands.join(' ')
  system(*commands)
end