# 面接用
require 'cgi'
require 'uri'
require 'strscan'
class TextStyle
def initialize(rules = nil)
@rules = Array.new
if (rules)
add(rules)
end
end
def clear
@rules.clear
end
def add(*args)
if ( args[0].instance_of?(Hash) )
add_hash(args[0])
elsif ( args[0].instance_of?(Array) )
add_hash_array(args[0])
elsif ( args.size > 0 )
add_param(args[0], args[1], args.size > 1 ? args[2] : nil)
else
raise ArgumentError
end
end
def add_hash_array(rules)
if (rules)
rules.each do |rule|
add_hash(rule)
end
end
end
def add_hash(param)
add(param[:re], param[:filter], param[:priority])
end
def add_param(re, filter, priority = nil)
if (priority.nil?)
priority = @rules.empty? ? 0 : @rules[-1][:priority] + 1
end
@rules << { :priority => priority, :re => re, :filter => filter }
end
def eval(text)
rules = @rules.sort do |a, b|
a[:priority] <=> b[:priority]
end
return eval_rule(text, rules, 0)
end
protected
def eval_rule(text, rules, i)
output = String.new
if (i >= rules.size || text.nil?)
return output
end
scanner = StringScanner.new(text)
post_match = nil
until scanner.eos?
token = scanner.scan_until(rules[i][:re])
if (token)
output << eval_rule(scanner.pre_match, rules, i + 1) + rules[i][:filter].call(scanner.matched)
scanner.string = scanner.post_match
else
output << eval_rule(scanner.string, rules, i + 1)
break
end
end
return output
end
end
rules = [{
:priority => 1,
:re => /s?https?:\/\/[-_\da-zA-Z.!~*'\(\);\/?:@&=+$,%\#]+/,
:filter => Proc.new do |s|
sprintf('',
URI.escape(s), CGI.escapeHTML(s))
end
},
{
:priority => 2,
:re => /@[a-zA-Z_]+/,
:filter => Proc.new do |s|
sprintf('',
URI.escape(s), CGI.escapeHTML(s))
end
},
{
:priority => 3,
:re => /#[a-zA-Z_]+/,
:filter => Proc.new do |s|
sprintf('',
URI.escape(s), CGI.escapeHTML(s))
end
},
{
:priority => 4,
:re => /.+/,
:filter => Proc.new do |s|
CGI.escapeHTML(s)
end
}
]
s = TextStyle.new(rules)
puts s.eval("@kusobot きた～ http://www.example.net/@kusobot#kusobot o-('-'o)#kusobot hoge")
# <s>きた～ o-('-'o) hoge
rules[0][:priority] = 2
rules[1][:priority] = 1
s.clear
s.add(rules)
puts s.eval("@kusobot きた～ http://www.example.net/@kusobot#kusobot o-('-'o)#kusobot hoge")
# <s>きた～ o-('-'o) hoge
s.clear
s.add(rules[1])
s.add(rules[2])
s.add(rules[3])
puts s.eval("@kusobot きた～ http://www.example.net/@kusobot#kusobot o-('-'o)#kusobot hoge")
# <s>きた～ http://www.example.net/ o-('-'o) hoge