find.rb

class JTask

  # JTask.find()
  # Retrieves records from the database file.
  # --------------------------------------------------------------------------------
  # Eg: JTask.find("test.json", 1) || JTask.find("test.json", first: 10)
  # #=> <JTask id=x, ...>
  # --------------------------------------------------------------------------------
  # See wiki guide for more usage examples...
  # https://github.com/adammcarthur/jtask/wiki/find

  def self.find(file, id_or_options, dir=nil)
    do_something_with_the_file
    
    case id_or_options
    when Integer
      self.find_by_id(file, id_or_options)
    when Array
      self.find_many(file, id_or_options)
    when Hash
      if keys.first.to_s == "first"
        self.find_first(file, id_or_options)
      elsif keys.first.to_s == "last"
        self.find_last(file, id_or_options)
      end
    when :all or nil
      self.find_all...
    end

  def self.find_by_id(..)
   ...
  end

end

find_tasks.rb

# lib/jtask/tasks/find_tasks.rb
class JTask
  def self.find_by_id(hash, id)
    if hash[id]
      record = { "id" => id.to_i }.merge(hash[id])
      return JTask.new(record)
    else
      return nil
    end
  end
  
  def self.find_many(hash, id_array)
    records = []
    id_array.each do |id|
      if hash[id]
        record = { "id" => id.to_i }.merge(hash["#{id}"])
        records << JTask.new(record)
      end
    end
    
    return records
  end
  
  def self.find_first(hash, amount)
    required_records = hash.to_a.first(amount)
    records = []
    
    required_records.each do |record|
      record_hash = {"id" => record.key.to_i}.merge(record)
      records << JTask.new(record_hash)
    end
    
    return records
  end
  
  def self.find_last(hash, amount)
    required_records = hash.to_a.last(amount)
    required_records = required_records.reverse
    records = []
    
    required_records.each do |record|
      record_hash = {"id" => record.key.to_i}.merge(record)
      records << JTask.new(record_hash)
    end
    
    return records
  end
  
  def self.find_all(hash)
    records = []
    hash.each do |record|
      record_hash = {"id" => record.key.to_i}.merge(record)
      records << record_hash
    end
    
    return records
  end
end