Class: RubyStringTemplate

Inherits:
String
  • Object
show all
Defined in:
lib/httpimagestore/ruby_string_template.rb

Direct Known Subclasses

Configuration::Path

Defined Under Namespace

Classes: NoValueForTemplatePlaceholderError

Instance Method Summary collapse

Constructor Details

#initialize(template, &resolver) ⇒ RubyStringTemplate

Returns a new instance of RubyStringTemplate.



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# File 'lib/httpimagestore/ruby_string_template.rb', line 8

def initialize(template, &resolver)
  super(template.to_s)
  @resolvers = []
  @resolvers << resolver if resolver
  @resolvers << ->(locals, name){locals[name]}
end

Instance Method Details

#add_missing_resolver(&resolver) ⇒ Object 



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# File 'lib/httpimagestore/ruby_string_template.rb', line 40

def add_missing_resolver(&resolver)
  @resolvers << resolver
end

#initialize_copy(source) ⇒ Object 



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# File 'lib/httpimagestore/ruby_string_template.rb', line 15

def initialize_copy(source)
  super
  # copy resolvers array
  resolvers =
  source.instance_eval do
    resolvers = @resolvers
  end
  @resolvers = resolvers.dup
end

#inspect ⇒ Object 



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# File 'lib/httpimagestore/ruby_string_template.rb', line 50

def inspect
  "T<#{to_s}>"
end

#render(locals = {}) ⇒ Object 



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# File 'lib/httpimagestore/ruby_string_template.rb', line 25

def render(locals = {})
  self.gsub(/#\{[^\}]+\}/um) do |placeholder|
    name = placeholder.match(/#\{([^\}]*)\}/u).captures.first.to_sym

    @resolvers.find do |resolver|
      value = resolver.call(locals, name)
      value and break value.to_s
    end or fail NoValueForTemplatePlaceholderError.new(name, self)
  end.to_s
end

#to_template ⇒ Object 



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# File 'lib/httpimagestore/ruby_string_template.rb', line 36

def to_template
  self
end

#with_missing_resolver(&resolver) ⇒ Object 



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# File 'lib/httpimagestore/ruby_string_template.rb', line 44

def with_missing_resolver(&resolver)
  new_template = self.dup
  new_template.add_missing_resolver(&resolver)
  new_template
end