Class: AppConf

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

Instance Method Summary collapse

Constructor Details

#initialize ⇒ AppConf

Returns a new instance of AppConf.



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# File 'lib/app_conf.rb', line 7

def initialize
  @hash = {}
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(method, *args, &block) ⇒ Object 



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# File 'lib/app_conf.rb', line 58

def method_missing(method, *args, &block)
  if method[-1] == '='
    self[method[0..-2]] = args.first
  else
    self[method]
  end
end

Instance Method Details

#[](key) ⇒ Object 



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# File 'lib/app_conf.rb', line 49

def [](key)
  value = @hash[key.to_s]
end

#[]=(key, value) ⇒ Object 



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# File 'lib/app_conf.rb', line 53

def []=(key, value)
  raise "Not allowed to overwrite nested entities" if @hash[key.to_s].is_a?(AppConf)
  @hash[key.to_s] = value
end

#clear(key = nil) ⇒ Object 



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# File 'lib/app_conf.rb', line 34

def clear key = nil
  key ? @hash[key.to_s] = nil : @hash = {}
  nil
end

#from_hash(hash) ⇒ Object 



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# File 'lib/app_conf.rb', line 66

def from_hash(hash)
  hash.each do |key, value|
    value = (self[key] || AppConf.new).from_hash(value) if value.is_a?(Hash)
    @hash[key.to_s] = value
  end
  self
end

#keys ⇒ Object 



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# File 'lib/app_conf.rb', line 45

def keys
  @hash.keys
end

#load(*filenames) ⇒ Object 



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# File 'lib/app_conf.rb', line 11

def load(*filenames)
  filenames.each do |filename|
    content = YAML.load_file(filename)
    from_hash(content) if content
  end
end

#save(key, filename) ⇒ Object 



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# File 'lib/app_conf.rb', line 18

def save(key, filename)
  mode = File.exist?(filename) ? 'r+' : 'w+'
  File.open(filename, mode) do |f|
    unless f.eof?
      begin
        pos = f.pos
        line = f.readline
      end until line =~ /^---/ || f.eof?
      line =~ /^---/ ? f.seek(pos) : f.rewind
    end
    hash = {key.to_s => self[key].to_hash}
    YAML.dump(hash, f)
    f.truncate(f.pos)
  end
end

#to_hash ⇒ Object 



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# File 'lib/app_conf.rb', line 39

def to_hash
  hash = {}
  @hash.each {|k, v| hash[k] = v.is_a?(AppConf) ? v.to_hash : v }
  hash
end