Class: TracerySymbol

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(grammar, key, rawRules) ⇒ TracerySymbol

Returns a new instance of TracerySymbol.



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# File 'lib/tracery.rb', line 481

def initialize(grammar, key, rawRules)
    # Symbols can be made with a single value, and array, or array of objects of (conditions/values)
    @key = key
    @grammar = grammar
    @rawRules = rawRules
    
    @baseRules = RuleSet.new(@grammar, @rawRules)
    clearState
end

Instance Attribute Details

#isDynamic ⇒ Object

Returns the value of attribute isDynamic.



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# File 'lib/tracery.rb', line 479

def isDynamic
  @isDynamic
end

Instance Method Details

#clearState ⇒ Object 



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# File 'lib/tracery.rb', line 491

def clearState
    # Clear the stack and clear all ruleset usages
    @stack = [@baseRules]
    @uses = []
    @baseRules.clearState
end

#getActiveRules ⇒ Object 



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# File 'lib/tracery.rb', line 516

def getActiveRules
    return nil if @stack.empty?
    return @stack.last.selectRule 
end

#popRules ⇒ Object 



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# File 'lib/tracery.rb', line 503

def popRules
    @stack.pop
end

#pushRules(rawRules) ⇒ Object 



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# File 'lib/tracery.rb', line 498

def pushRules(rawRules)
    rules = RuleSet.new(@grammar, rawRules)
    @stack.push rules
end

#rulesToJSON ⇒ Object 



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# File 'lib/tracery.rb', line 521

def rulesToJSON
    return @rawRules.to_json
end

#selectRule(node, errors) ⇒ Object 



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# File 'lib/tracery.rb', line 507

def selectRule(node, errors)
    @uses.push({ node: node })
    if(@stack.empty?) then
        errors << "The rule stack for '#{@key}' is empty, too many pops?"
        return "((#{@key}))"
    end
    return @stack.last.selectRule
end