Class: MongoidErd

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

Instance Method Summary collapse

Constructor Details

#initialize(config = {}) ⇒ MongoidErd

Returns a new instance of MongoidErd.



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# File 'lib/mongoid_erd.rb', line 29

def initialize config = {}
  @config = config
    # tag: [], tags: {}, include = [], exclude = [], model_dir = ""
  
  # parse the option file
  if @config[:conf_file] and File.exists? @config[:conf_file]
    yml = YAML.load(File.open(@config[:conf_file], 'r:utf-8').read)
    @config[:tags] = yml["tags"]
    @config[:title] = yml["title"]
  else
    raise "#{@config[:conf_file]} does not exists" if @config[:conf_file]
  end
  
  # merge tag attributes recursively
  @config[:tags].each do |t,v|
    tv = @config[:tags]["_default"].clone || {} 
    p = nil
    t.split('.').each do |pt|
      p = p ? [p, pt].join('.') : pt # merge in order: tv < a < a.b < a.b.c, ...
      # puts "merge from #{p} to #{t}"
      tv.merge! @config[:tags][p] if @config[:tags][p]
    end
    @config[:tags][t] = tv
  end

  @models = Hash.new
end

Instance Method Details

#get(key) ⇒ Object 



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# File 'lib/mongoid_erd.rb', line 61

def get key
  @config[key]
end

#output ⇒ Object 



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# File 'lib/mongoid_erd.rb', line 190

def output 
  g = Rviz::Graph.new @config[:title], {rankdir: 'LR', dpi: 300}

  @models.each do |mname, model|
    g.add_record(model.name.camelize, model.attrs)
    g.node(model.name.camelize).add_row(model.title, true)
    model.fields.each do |field|
      g.node(model.name.camelize).add_row(field.as_row, true, 'l')
      if field.edge
        to_node, to_anchor, attrs = field.edge[0].underscore, field.edge[1], field.edge[2]
        unless @models[to_node]
          g.add(to_node.camelize, 'oval', {style:'filled', fillcolor:'grey', color:'grey'})
          to_anchor = ''
        end
        g.link(model.name.camelize, field.as_row, to_node.camelize, to_anchor, attrs)
      end
    end

    # relations
    if model.parent
      unless @models[model.parent]
        g.add(model.parent.camelize, 'oval', {style:'filled', fillcolor:'grey', color:'grey'})
      end
      g.link(model.name.camelize, model.title, model.parent.camelize, '', {arrowhead: 'onormal'})
    end
  end

  g.output
end

#parse ⇒ Object

parse the fold contains mongoid source



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# File 'lib/mongoid_erd.rb', line 75

def parse
  raise "directory #{@config[:model_dir]} not exists" unless File.directory? @config[:model_dir]
  Dir["#{@config[:model_dir]}/*.rb"].each do |file|
    crt_model = Model.new
    model_attrs_ = Hash.new
    in_public = true
    File.open(file, 'r:utf-8').each do |line|
      line.chomp!

      # erd_tag and attr
      if /^[\#\s]*erd_tag\:?\s*(?<tag_>[\w\.]+)/ =~ line
        crt_model.tag = tag_ 
        crt_model.attrs = @config[:tags][tag_]
      end

      # catch class definition
      if /^\s*class\s+(?<name_>\w+)/ =~ line
        crt_model.name = name_.underscore 
        self.parse_erd crt_model, line
        if /^\s*class\s+\w+\s+\<\s+(?<parent_>\w+)/ =~ line
          crt_model.parent = parent_.underscore if parent_
        end
      end
      
      # catch functions
      in_public = true if /public\:/ =~ line
      in_public = false if /private\:/ =~ line

      if /^\s*def\s+(?<func_>[^#]+)\s*/ =~ line
        field_ = Fields.new
        field_.name, field_.type = func_, 'function'
        self.parse_erd field_, line # parse erd attr and label
        # arbitrage link
        if /\-\>\s*(?<name_>\w+)(\{(?<attrs_>.+)\})?/ =~ line
          attrs = {}
          attrs = YAML.load(attrs_) if attrs_
          field_.edge = [name_, '', attrs]
        end
        crt_model.fields << field_ 
      end

      # catch field
      if /^\s*field\s+\:(?<name_>\w+)\s*\,.*\:?type\:?\s*(?<type_>[A-Za-z_0-9\:]+)/ =~ line
        field_ = Fields.new
        field_.name, field_.type = name_, type_
        self.parse_erd field_, line # parse erd attr and label
        # arbitrage link
        if /\-\>\s*(?<name_>\w+)(\{(?<attrs_>.+)\})?/ =~ line
          attrs = {}
          attrs = YAML.load(attrs_) if attrs_
          field_.edge = [name_, '', attrs]
        end
        crt_model.fields << field_ 
      end

      # catch relations
      if /^\s*(?<rel_>embeds_many|embeds_one|has_many|has_one|belongs_to|embedded_in)\s+\:(?<name_>\w+)\s*(\,.*\:?as\:?\s*(?<as_>\w+))?/ =~ line
        field_ = Fields.new
        field_.name, field_.type = rel_, name_
        field_.name = "#{rel_} (as #{as_})" if as_
        self.parse_erd field_, line # parse erd attr and label
        crt_model.fields << field_ 
        #if %w[belongs_to embedded_in embeds_one has_one].include? rel_
        field_.edge = [name_, '', {label: rel_, arrowhead: 'normal'}]
        #end
      end
      
      # common extension field
      if /^\s*symbolize\s+\:(?<name>\w+)\s*\,.*\:?in\:?.*(?<in_>\[.+\])/ =~ line
        field_ = Fields.new
        field_.name, field_.type = name_, "symbolized in #{in_}"
        self.parse_erd field_, line # parse erd attr and label
        crt_model.fields << field_ 
      end

      if /^\s*state_machine\s+\:(?<state_>\w+)/ =~ line
        field_ = Fields.new
        field_.name = state_ == "initial" ? "state" : state_
        field_.type = "state_machine"
        self.parse_erd field_, line # parse erd attr and label
        crt_model.fields << field_ 
      end

      if /\s*as_enum\s+\:(?<name_>\w+)\s*\,\s*(?<enum_>[^#]+)/ =~ line
        field_ = Fields.new
        field_.name = name_
        field_.type = "[ENUM] " + enum_ 
        self.parse_erd field_, line # parse erd attr and label
        crt_model.fields << field_ 
      end

    end # open and parse one file

    # assign attributes at the last moment
    crt_model.attrs.merge! model_attrs_

    # if config.include/tag, default to exclude_it = true
    if @config[:include].size > 0 or @config[:tag].size > 0
      include_it = false
    else
      include_it = true
    end

    # if in the include list, include it
    include_it = true if @config[:include] and @config[:include].include? crt_model.name
    @config[:tag].each do |t|
      include_it = true if t == crt_model.tag or /^#{t}(\..+)?/.match(crt_model.tag)
    end

    include_it = false if @config[:exclude].include? crt_model.name
    @models[crt_model.name] = crt_model if include_it
  end # open directory
  self
end

#parse_erd(o, line) ⇒ Object 



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# File 'lib/mongoid_erd.rb', line 65

def parse_erd o, line
  if /erd\{(?<yml_>.+?)\}:?/ =~ line
    o.attrs.merge! YAML.load(yml_) if yml_
  end
  if /erd(\{.+?\})?\s*:?\s+(?<label_>.+)/ =~ line
    o.erd_label = label_ if label_
  end
end

#set(key, value) ⇒ Object 



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# File 'lib/mongoid_erd.rb', line 57

def set key, value
  @config[key] = value
end