committed website v. 0.1.0

1 files changed, 158 insertions, 0 deletions

diff --git a/lib/property_set.rb b/lib/property_set.rb
new file mode 100644
index 0000000..c315a13
--- /dev/null
+++ b/lib/property_set.rb
@@ -0,0 +1,158 @@
+#
+# holds the set or properties defined for each static page.
+# property sets are organized by locale.
+#
+# e.g.
+#
+# setting the property (in en.haml):
+#
+#   - @title = 'hi'
+#
+# getting the property
+#
+#   page.props.title
+#
+
+require 'i18n'
+require 'time'
+require 'rubygems'
+require 'haml'
+require 'RedCloth'
+
+class PropertySet
+
+  DEFAULT_LOCALE = 'en'
+
+  #
+  # a simple class to pass through all member variables as attributes.
+  # when the template for a page is evaluated, all the member variabled defined in that template
+  # are loaded as member variables of the AttrObject instance.
+  #
+  class AttrObject
+    def initialize(property_set, locale)
+      @_ps = property_set
+      @_locale = locale
+      #code.gsub!(/^((?!^\-\ \@).)*$/, '')  # remove any lines not starting with '- @'
+      #code.gsub!(/^- /m, '') # remove '-'
+      #instance_eval(code)
+      #instance_variables.grep(/_at$/).each do |time_variable|
+      #  instance_variable_set(time_variable, Time.parse(instance_variable_get(time_variable)))
+      #end
+    end
+    def method_missing(method)
+      get(method)
+    end
+    def textile(str)
+      RedCloth.new(str).to_html
+    end
+    def get(var_name)
+      value = instance_variable_get("@#{var_name}")
+      if value.nil?
+        if @_locale != DEFAULT_LOCALE
+          # try value from default locale
+          @_ps.get_var(var_name)
+        else
+          # try inherited value
+          @_ps.get_inherited_var(var_name, @_locale)
+        end
+      else
+        value
+      end
+    end
+    def set(var_name, value)
+      instance_variable_set("@#{var_name}", value)
+    end
+  end
+
+  def initialize(page=nil)
+    @page = page
+    @locales = {}
+  end
+
+
+  #
+  # maybe something like this in the future:
+  #
+  #contr = PagesController.new()
+  #contr.response = ActionController::Response.new()
+  #scope = ActionView::Base.new(["#{RAILS_ROOT}/app/views/pages","#{RAILS_ROOT}/app/views"], {}, contr)
+  #scope.template_format = 'html'
+  #Haml::Engine.new(value, :format => :html5).render(scope)
+  #
+
+  #
+  # evaluate the template_string, and load the variables defined into an AttrObject.
+  #
+  def eval(locale, template_string)
+    attrs = AttrObject.new(self, locale)
+    body = nil
+    begin
+      body = Haml::Engine.new(template_string, :format => :html5).render(attrs)  # template is evaluated in scope of attrs
+    rescue Exception => exc
+      # eat exceptions
+    end
+    attrs.instance_variable_set('@body', body)
+    attrs.instance_variables.grep(/_at$/).each do |time_variable|
+      attrs.instance_variable_set(time_variable, Time.parse(attrs.instance_variable_get(time_variable)))
+    end
+    @locales[locale] = attrs
+  end
+
+  #
+  # allows property_set.propname shortcut, assumes default locale
+  #
+  def method_missing(method)
+    get_var(method)
+  end
+
+  def locale(l)
+    @locales[l.to_s] || @locales[DEFAULT_LOCALE]
+  end
+
+  def get_var(var_name, locale=I18n.locale)
+    attrs = locale(locale)
+    if attrs
+      attrs.get(var_name)
+    else
+      nil
+    end
+  end
+
+  #
+  # tries to get the value of an inherited variable
+  #
+  def get_inherited_var(var_name, locale=I18n.locale)
+    if @page && @page.parent && @page.parent.props
+      @page.parent.props.get_var(var_name, locale)
+    end
+  end
+end
+
+#
+# a simple little test.
+#
+if ARGV.grep('--test').any?
+  text_en = "
+- @title = 'hi'
+- @author = 'you'
+- @created_at = 'Sun Aug 12 18:32:20 PDT 2012'
+- ignored = 1
+this is the body"
+
+  text_es = "
+- @title = 'hola'
+- @author = 'tu'
+- @heading = textile 'h1. hi'
+"
+
+  ps = PropertySet.new
+  ps.eval('en', text_en)
+  ps.eval('es', text_es)
+
+  p ps.title == 'hi'
+  p ps.locale(:es).title == 'hola'
+  p ps.locale(:es).created_at == Time.parse('Sun Aug 12 18:32:20 PDT 2012')
+  p ps.ignored == nil
+  p ps.locale(:es).heading == "<h1>hi</h1>"
+  p ps.body == "this is the body\n"
+end