Module: GenericHelper

Defined in:
lib/sapis/generic_helper.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.camelize(string) ⇒ Object

Trivial version. Can easily be done with a regex.



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# File 'lib/sapis/generic_helper.rb', line 46

def self.camelize(string)
  buffer          = ""
  capitalize_next = true

  string.chars.each do |char|
    if char == '_'
      capitalize_next = true
    elsif capitalize_next
      buffer << char.upcase
      capitalize_next = false
    else
      buffer << char
    end
  end

  buffer
end

.do_retry(options = {}, &block) ⇒ Object 



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# File 'lib/sapis/generic_helper.rb', line 24

def self.do_retry(options={}, &block)
  max_retries    = options[:max_retries] || 3
  sleep_interval = options[:sleep] || 0

  current_retries = 0

  begin
    yield
  rescue
    current_retries += 1

    if current_retries <= max_retries
      sleep sleep_interval
      retry
    end

    raise
  end
end

Instance Method Details

#decode_date(encoded_date, future: true) ⇒ Object

options:

:past: [false] the date can be future (supported only by some cases)

Format:

'YYYY-MM-DD', 'YYYYMMDD', 'MMM/DD/YYYY', 'MMM/D(D)', 'D(D)/MMM' (curr. year), 'MMDD' (curr. year)
'to[day]', 'ye[sterday]', 'mon' (monday), 'tue-' (last tuesday),
'+3' (today+3), '-2' (today-2)

Note that the easiest way to pass ‘-<value>’ in bash, is to use ‘–’ (end of options).



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# File 'lib/sapis/generic_helper.rb', line 76

def decode_date(encoded_date, future: true)
   case encoded_date.downcase
   # YYYY-MM-DD
   when %r{^(\d\d\d\d)-(\d\d)-(\d\d)$}
     Date.new($1.to_i, $2.to_i, $3.to_i)
   # YYYYMMDD
   when /^(\d\d\d\d)(\d\d)(\d\d)$/
     Date.new($1.to_i, $2.to_i, $3.to_i)
   # MMM/DD/YYYY
   when %r{^(\w{3})/(\d\d)/(\d\d\d\d)$}
     month_index_for_time = Date.strptime($1, "%b").month
     Date.new($3.to_i, month_index_for_time, $2.to_i)
   # MMM/D(D) (+future)
   when %r{^(\w{3})\/(\d{1,2})$}
     month_index_for_time = Date.strptime($1, "%b").month
     Date.new(Date.today.year, month_index_for_time, $2.to_i)
       .then { !future && it > Date.today ? it << 12 : it }
   # D(D)/MMM/YYYY
   when %r{^(\d{1,2})/(\w{3})/(\d\d\d\d)$}
     month_index_for_time = Date.strptime($2, "%b").month
     Date.new($3.to_i, month_index_for_time, $1.to_i)
   # D(D)/MMM
   when %r{^(\d{1,2})\/(\w{3})$}
     month_index_for_time = Date.strptime($2, "%b").month
     Date.new(Date.today.year, month_index_for_time, $1.to_i)
   # MMDD
   when /^(\d\d)(\d\d)$/
     Date.new(Time.now.year, $1.to_i, $2.to_i)
   when 'to', 'today'
     Date.today
   when 'ye', 'yesterday'
     Date.today - 1
   when /^(sun|mon|tue|wed|thu|fri|sat)$/
     diff = (Date.strptime($1, "%a") - Date.today).to_i
     diff += 7 if diff <= 0
     Date.today + diff
   when /^(sun|mon|tue|wed|thu|fri|sat)-$/
     diff = (Date.strptime($1, "%a") - Date.today).to_i
     diff -= 7 if diff >= 0
     Date.today + diff
   when /^\+(\d+)$/
     Date.today + $1.to_i
   when /^-(\d+)$/
     Date.today - $1.to_i
   else
     raise "Unrecognized date: #{encoded_date}"
   end
end

#decode_interval(*daytime) ⇒ Object

Params:

day, start, end

Format:

* DAY:   'YYYY-MM-DD', 'YYYYMMDD', 'MMDD', 'to[day]', 'ye[sterday]', 'thu' (thursday of the current week), 'mon-' (last monday), 'tue+' (next tuesday), 'MMM/DD'
* START: 'HH', 'HH:MM'
* END:   '3d', '2h', '45m', 'HH', 'HH:MM'

Possible combinations:

* (nothing)          all today
* DAY                on the day, for all day
* DAY,END            from day to end, for all day
* DAY,START,END      on the day, from start to end
* START,END          today, from start to end

Note that the ‘current week’ starts on Sunday.

In the regexes, numbered repetitions (‘n’) are not used for consistency.

The Date class pretty much sucks. Between the other things, it doesn’t accept string values when instantiating.



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# File 'lib/sapis/generic_helper.rb', line 150

def decode_interval(*daytime)
  current_token = daytime.shift

  if current_token
    base_day = decode_date(current_token)

    if base_day.nil?
      base_day = Date.today
      daytime.unshift(current_token)
    end
  else
    base_day = Date.today
    daytime.unshift(current_token)
  end

  raise "Wrong start year format. Non-consumed tokens: #{daytime}" if base_day.nil?

  current_token = daytime.shift

  # The next token could be both a start (e.g. DAY,START,END) or an END (e.g. DAY,END).
  # Since we can't rely on character patterns because of the HH:MM case, we rely on the
  # number of tokens: START can be present only if at this point there are two tokens.
  #
  if daytime.size == 1
    case current_token
    when /^(\d{1,2})$/
      start_daytime = Time.local(base_day.year, base_day.month, base_day.day, $1)
    when /^(\d{1,2}):(\d\d)$/
      start_daytime = Time.local(base_day.year, base_day.month, base_day.day, $1, $2)
    else
      daytime.unshift(current_token)
    end

    all_day = false
  else
    start_daytime = Time.local(base_day.year, base_day.month, base_day.day)
    all_day = true
    daytime.unshift(current_token)
  end

  raise "Wrong start daytime format. Non-consumed tokens: #{daytime}" if start_daytime.nil?

  current_token = daytime.shift

  if current_token
    if all_day
      # Only full days allowed in case of all-day timespan
      #
      if current_token =~ /^(\d+)d$/
        end_daytime = add_days(start_daytime, $1.to_i)
      else
        daytime.unshift(current_token)
      end
    else
      case current_token.downcase
      when /^(\d+)d$/
        end_daytime = start_daytime + $1.to_i * 24 * 60 * 60
      when /^(\d+)h$/
        end_daytime = start_daytime + $1.to_i * 60 * 60
      when /^(\d+)m$/
        end_daytime = start_daytime + $1.to_i * 60
      when /^(\d{1,2})$/
        end_daytime = Time.local(start_daytime.year, start_daytime.month, start_daytime.day, $1)
      when /^(\d{1,2}):(\d\d)$/
        end_daytime = Time.local(start_daytime.year, start_daytime.month, start_daytime.day, $1, $2)
      else
        daytime.unshift(current_token)
      end
    end
  else
    # We're here if none of START/END have been passed; we default to +1 day.
    # At this point, there are no tokens to unshift
    #
    end_daytime = add_days(start_daytime, 1)
  end

  raise "Wrong end daytime format. Non-consumed tokens: #{daytime}" if end_daytime.nil?

  raise "Non-consumed tokens found: #{daytime}" if daytime.size > 0

  [start_daytime, end_daytime, all_day]
end