Parse Export

require 'parse-ruby-client'
require 'date'

Parse.init application_id: ENV['PARSE_APP_ID'],
           api_key: ENV['PARSE_API_KEY'],
           master_key: ENV['PARSE_MASTER_KEY'],
           quiet: true

def get_class(classname)
  get_class_in_range(classname, Date.parse('2014-01-01'), Date.today + 1)
end

def get_class_in_range(classname, from_date, to_date)
  data = []

  total = Parse::Query.new(classname).tap do |q| 
    q.limit=0
    q.greater_eq('createdAt', Parse::Date.new(from_date))
    q.less_eq('createdAt', Parse::Date.new(to_date))
    q.count 
  end.get['count']
  iterations = ((total / 1000).to_i) + 1
  first_run = true
  objectId = nil

  iterations.times do |i|
    results = Parse::Query.new(classname).tap do |q|
                q.greater_eq('createdAt', Parse::Date.new(from_date))
                q.less_eq('createdAt', Parse::Date.new(to_date))
                q.order_by = "objectId"
                q.order = :descending
                q.limit = 1000
                if (!first_run)
                   q.less_than("objectId", objectId)
                end
              end.get
    objectId = results.last['objectId'] if results.last
    first_run = false

    data += results
  end

  data

  # from the good old days when we had < 10000 rows
  # i=0
  # while data.size < total do
  #     results = Parse::Query.new(classname).tap do |q|
  #                 q.limit = 1000
  #                 q.skip = i * 1000
  #               end.get
  #     data += results
  #     i += 1
  # end

  # data
end