Method: BBLib.pattern_render

Defined in:
lib/bblib/core/util/string.rb

.pattern_render(text, context = {}) ⇒ Object

Pattern render takes (by default) a mustache style template and then uses a context (either a Hash or Object) to then interpolate in placeholders. The default pattern looks for {method_name} within the string but can be customized to a different pattern by setting the pattern named argument.

Raises:

  • (ArgumentError) 


102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
 
# File 'lib/bblib/core/util/string.rb', line 102

def self.pattern_render(text, context = {})
  raise ArgumentError, "Expected text argument to be a String, got a #{text.class}" unless text.is_a?(String)
  # TODO Make patterns customizable

  pattern       = /\{{2}.*?\}{2}/
  field_pattern = /(?<=^\{{2}).*(?=\}{2})/
  txt           = text.dup
  txt.scan(pattern).each do |match|
    field = match.scan(field_pattern).first
    next unless field
    value = case context
    when Hash
      context.hpath(field).first
    else
      context.send(field) if context.respond_to?(field)
    end.to_s
    txt.sub!(match, value)
  end
  txt
end