Class: ModelParser

Inherits:
Object
  • Object
show all
Defined in:
lib/model-visualizer/model-parser.rb

Instance Method Summary collapse

Constructor Details

#initialize(models) ⇒ ModelParser

Returns a new instance of ModelParser.



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# File 'lib/model-visualizer/model-parser.rb', line 7

def initialize(models)
    @models = models
end

Instance Method Details

#fix_case(string) ⇒ Object 



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# File 'lib/model-visualizer/model-parser.rb', line 53

def fix_case(string)
    ActiveSupport::Inflector.singularize(ActiveSupport::Inflector.camelize(string))
end

#parse(root) ⇒ Object 



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# File 'lib/model-visualizer/model-parser.rb', line 11

def parse(root)
    unless Dir.exists? File.join(root, 'app/models/')
        abort 'app/models/ directory does not exist! Run from or pass the root directory of your Rails project.'
    end

    files = Dir[File.join(root, 'app/models/**/*.rb')]
    curr_model = nil

    # TODO: maybe factor this out into a parent class?
    for file in files
        IO.foreach(file) do |line|
            # TODO: hack to skip associations, we need to display these as "has_many: Users AS Managers"
            if line.include? 'class_name'
                next
            end

            line.strip!
            if !(/^class ([[:alpha:]]+) < ActiveRecord::Base/.match(line)).nil?
                name = /^class ([[:alpha:]]+) < ActiveRecord::Base/.match(line)[1] 
                curr_model = Model.new(name)
                @models[name] = curr_model

            elsif !(/^has_many :(\w+)/.match(line)).nil?
                model_neighbor = /^has_many :(\w+)/.match(line)[1]
                curr_model.add_has_many fix_case(model_neighbor)

            elsif !(/^has_one :(\w+)/.match(line)).nil?
                model_neighbor = /^has_one :(\w+)/.match(line)[1]
                curr_model.add_has_one fix_case(model_neighbor)

            elsif !(/^has_and_belongs_to_many :(\w+)/.match(line)).nil?
                model_neighbor = /^has_and_belongs_to_many :(\w+)/.match(line)[1]
                curr_model.add_has_and_belongs_to_many fix_case(model_neighbor)

            elsif !(/^belongs_to :(\w+)/.match(line)).nil?
                model_neighbor = /^belongs_to :(\w+)/.match(line)[1]
                curr_model.add_belongs_to fix_case(model_neighbor)
            end
        end
    end
end