Class: Stringento::Template

Inherits:
Object
  • Object
show all
Defined in:
lib/stringento/template.rb

Overview

This is the main rendering engine for the library. It connects together the notions of: parsing, value resolution, and value formatting in a consumable way.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(value) ⇒ Template

Returns a new instance of Template.



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# File 'lib/stringento/template.rb', line 20

def initialize(value)
  @value = value.to_s
end

Instance Attribute Details

#value ⇒ Object (readonly)

Returns the value of attribute value.



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# File 'lib/stringento/template.rb', line 18

def value
  @value
end

Instance Method Details

#evaluate(input, resolver: Resolver.new, formatter: Formatter.new) ⇒ Object 



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# File 'lib/stringento/template.rb', line 30

def evaluate(input, resolver: Resolver.new, formatter: Formatter.new)
  placeholders.inject(value) do |output, placeholder|
    resolved_value = (resolver || default_resolver).resolve(placeholder.name, input)

    formatted_value = (formatter || default_formatter).formatter(
      placeholder.formatter,
      resolved_value,
      placeholder.arg
    )

    output.gsub("{#{placeholder.value}}", formatted_value)
  end
end

#placeholders ⇒ Object 



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# File 'lib/stringento/template.rb', line 24

def placeholders
  @placeholders ||= value.scan(TOKEN_REGULAR_EXPRESSION)
                         .flatten
                         .map { |str| Placeholder.new(str) }
end