improved starting point

source/_helpers.rb

@@ -0,0 +1,191 @@
+gem 'activesupport', ">= 2.3.2"
+require 'active_support'
+require 'rubypants'
+
+module Helpers
+  module EscapeHelper
+    HTML_ESCAPE = { '&' => '&amp; ',  '>' => '&gt;',   '<' => '&lt;', '"' => '&quot;' }
+    JSON_ESCAPE = { '&' => '\u0026 ', '>' => '\u003E', '<' => '\u003C' }
+    
+    # A utility method for escaping HTML tag characters.
+    # This method is also aliased as <tt>h</tt>.
+    #
+    # In your ERb templates, use this method to escape any unsafe content. For example:
+    #   <%=h @person.name %>
+    #
+    # ==== Example:
+    #   puts html_escape("is a > 0 & a < 10?")
+    #   # => is a &gt; 0 &amp; a &lt; 10?
+    def html_escape(html)
+      html.to_s.gsub(/[&"><]/) { |special| HTML_ESCAPE[special] }
+    end
+    def escape_once(html)
+      html.to_s.gsub(/[\"><]|&(?!([a-zA-Z]+|(#\d+));)/) { |special| HTML_ESCAPE[special] }
+    end
+    alias h escape_once
+    
+    # A utility method for escaping HTML entities in JSON strings.
+    # This method is also aliased as <tt>j</tt>.
+    #
+    # In your ERb templates, use this method to escape any HTML entities:
+    #   <%=j @person.to_json %>
+    #
+    # ==== Example:
+    #   puts json_escape("is a > 0 & a < 10?")
+    #   # => is a \u003E 0 \u0026 a \u003C 10?
+    def json_escape(s)
+      s.to_s.gsub(/[&"><]/) { |special| JSON_ESCAPE[special] }
+    end
+    
+    alias j json_escape
+  end
+  include EscapeHelper
+  
+  module ParamsHelper
+    def params
+      @params ||= begin
+        q = request.query.dup
+        q.each { |(k,v)| q[k.to_s.intern] = v }
+        q
+      end
+    end
+  end
+  include ParamsHelper
+  
+  module TagHelper
+    def content_tag(name, content, html_options={})
+      %{<#{name}#{html_attributes(html_options)}>#{content}</#{name}>}
+    end
+    
+    def tag(name, html_options={})
+      %{<#{name}#{html_attributes(html_options)} />}
+    end
+    
+    def image_tag(src, html_options = {})
+      tag(:img, html_options.merge({:src=>src}))
+    end
+    
+    def javascript_tag(content = nil, html_options = {})
+      content_tag(:script, javascript_cdata_section(content), html_options.merge(:type => "text/javascript"))
+    end
+    
+    def link_to(name, href, html_options = {})
+      html_options = html_options.stringify_keys
+      confirm = html_options.delete("confirm")
+      onclick = "if (!confirm('#{html_escape(confirm)}')) return false;" if confirm
+      content_tag(:a, name, html_options.merge(:href => href, :onclick=>onclick))
+    end
+    
+    def link_to_function(name, *args, &block)
+      html_options = {}
+      html_options = args.pop if args.last.is_a? Hash
+      function = args[0] || ''
+      onclick = "#{"#{html_options[:onclick]}; " if html_options[:onclick]}#{function}; return false;"
+      href = html_options[:href] || '#'
+      content_tag(:a, name, html_options.merge(:href => href, :onclick => onclick))
+    end
+    
+    def mail_to(email_address, name = nil, html_options = {})
+      html_options = html_options.stringify_keys
+      encode = html_options.delete("encode").to_s
+      cc, bcc, subject, body = html_options.delete("cc"), html_options.delete("bcc"), html_options.delete("subject"), html_options.delete("body")
+      
+      string = ''
+      extras = ''
+      extras << "cc=#{CGI.escape(cc).gsub("+", "%20")}&" unless cc.nil?
+      extras << "bcc=#{CGI.escape(bcc).gsub("+", "%20")}&" unless bcc.nil?
+      extras << "body=#{CGI.escape(body).gsub("+", "%20")}&" unless body.nil?
+      extras << "subject=#{CGI.escape(subject).gsub("+", "%20")}&" unless subject.nil?
+      extras = "?" << extras.gsub!(/&?$/,"") unless extras.empty?
+      
+      email_address = email_address.to_s
+      
+      email_address_obfuscated = email_address.dup
+      email_address_obfuscated.gsub!(/@/, html_options.delete("replace_at")) if html_options.has_key?("replace_at")
+      email_address_obfuscated.gsub!(/\./, html_options.delete("replace_dot")) if html_options.has_key?("replace_dot")
+      
+      if encode == "javascript"
+        "document.write('#{content_tag("a", name || email_address_obfuscated, html_options.merge({ "href" => "mailto:"+email_address+extras }))}');".each_byte do |c|
+          string << sprintf("%%%x", c)
+        end
+        "<script type=\"#{Mime::JS}\">eval(decodeURIComponent('#{string}'))</script>"
+      elsif encode == "hex"
+        email_address_encoded = ''
+        email_address_obfuscated.each_byte do |c|
+          email_address_encoded << sprintf("&#%d;", c)
+        end
+        
+        protocol = 'mailto:'
+        protocol.each_byte { |c| string << sprintf("&#%d;", c) }
+        
+        email_address.each_byte do |c|
+          char = c.chr
+          string << (char =~ /\w/ ? sprintf("%%%x", c) : char)
+        end
+        content_tag "a", name || email_address_encoded, html_options.merge({ "href" => "#{string}#{extras}" })
+      else
+        content_tag "a", name || email_address_obfuscated, html_options.merge({ "href" => "mailto:#{email_address}#{extras}" })
+      end
+    end
+    
+    private
+    
+      def cdata_section(content)
+        "<![CDATA[#{content}]]>"
+      end
+      
+      def javascript_cdata_section(content) #:nodoc:
+        "\n//#{cdata_section("\n#{content}\n//")}\n"
+      end
+      
+      def html_attributes(options)
+        unless options.blank?
+          attrs = []
+          options.each_pair do |key, value|
+            if value == true
+              attrs << %(#{key}="#{key}") if value
+            else
+              attrs << %(#{key}="#{value}") unless value.nil?
+            end
+          end
+          " #{attrs.sort * ' '}" unless attrs.empty?
+        end
+      end
+  end
+  include TagHelper
+  
+  # My added helpers
+  
+  def shorten_words (string, word_limit = 25)
+    words = string.split(/\s/)
+    if words.size >= word_limit
+      words[0,(word_limit-1)].join(" ") + '&hellip;'
+    else 
+      string
+    end
+  end
+  
+  def shorten (string, char_limit = 55)
+    chars = string.scan(/.{1,1}/)
+    if chars.size >= char_limit
+      chars[0,(char_limit-1)].join + '&hellip;'
+    else
+      "blah2"
+    end
+  end
+  
+  def absolute_url(input)
+    input.gsub(/(href|src)(\s*=\s*)(["'])(\/.*?)\3/) { $1 + $2 + $3 + "http://brandonmathis.com" + $4 + $3 }
+  end
+  
+  def full_url(input)
+    'http://brandonmathis.com'+input
+  end
+  def rp(input)
+    RubyPants.new(input).to_html
+  end
+  def style_amp(input)
+    input.gsub(" & "," <span class='amp'>&</span> ")
+  end
+end
+