Class: LedgerWeb::Database

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

Class Method Summary collapse

Class Method Details

.close ⇒ Object 



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# File 'lib/ledger_web/db.rb', line 14

def self.close
  @@db.disconnect
end

.connect ⇒ Object 



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# File 'lib/ledger_web/db.rb', line 9

def self.connect
  @@db = Sequel.connect(LedgerWeb::Config.instance.get(:database_url))
  self.run_migrations()
end

.dump_ledger_to_csv ⇒ Object 



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# File 'lib/ledger_web/db.rb', line 31

def self.dump_ledger_to_csv
  ledger_bin_path = LedgerWeb::Config.instance.get :ledger_bin_path
  ledger_file = LedgerWeb::Config.instance.get :ledger_file
  ledger_format = LedgerWeb::Config.instance.get :ledger_format

  puts "Dumping ledger to file..."
  file = Tempfile.new('ledger')
  system "#{ledger_bin_path} -f #{ledger_file} --format='#{ledger_format}' reg > #{file.path}"
  replaced_file = Tempfile.new('ledger')
  replaced_file.write(file.read.gsub('\"', '""'))
  replaced_file.flush

  puts "Dump finished"
  return replaced_file
end

.handle ⇒ Object 



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# File 'lib/ledger_web/db.rb', line 18

def self.handle
  @@db
end

.load_database(file) ⇒ Object 



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# File 'lib/ledger_web/db.rb', line 47

def self.load_database(file)
  counter = 0
  @@db.transaction do

    LedgerWeb::Config.instance.run_hooks(:before_load, @@db)

    puts "Clearing ledger table...."
    @@db["DELETE FROM ledger"].delete
    puts "Done clearing ledger table"

    puts "Loading into database...."

    CSV.foreach(file.path) do |row|
      counter += 1
      row = Hash[*[
        :xtn_id,
        :xtn_date,
        :note,
        :account,
        :commodity, 
        :amount,
        :cleared,
        :virtual,
        :tags,
        :cost
      ].zip(row).flatten]

      xtn_date = Date.strptime(row[:xtn_date], '%Y/%m/%d')

      row[:xtn_month] = xtn_date.strftime('%Y/%m/01')
      row[:xtn_year]  = xtn_date.strftime('%Y/01/01')
      row[:cost] = parse_cost(row[:cost])

      row = LedgerWeb::Config.instance.run_hooks(:before_insert_row, row)
      @@db[:ledger].insert(row)
      LedgerWeb::Config.instance.run_hooks(:after_insert_row, row)
    end

    puts "Running after_load hooks"
    LedgerWeb::Config.instance.run_hooks(:after_load, @@db)
  end
  puts "Analyzing ledger table"
  @@db.fetch('VACUUM ANALYZE ledger').all
  puts "Done!"
  counter
end

.load_prices ⇒ Object 



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# File 'lib/ledger_web/db.rb', line 104

def self.load_prices
  query = "    select\n      commodity,\n      min_date,\n      case\n        when amount = 0 then max_date\n        else now()::date\n      end as max_date\n    from (\n      select\n        commodity,\n        min(xtn_date) as min_date,\n        max(xtn_date) as max_date,\n        sum(amount) as amount\n      from\n        ledger\n      group by\n        commodity\n    ) x\n"

  puts "    Deleting prices"
  @@db["DELETE FROM prices"].delete

  rows = @@db.fetch(query)
  proc = LedgerWeb::Config.instance.get :price_function
  skip = LedgerWeb::Config.instance.get :price_lookup_skip_symbols

  puts "Loading prices"
  rows.each do |row|
    if skip.include?(row[:commodity])
      next
    end

    prices = proc.call(row[:commodity], row[:min_date], row[:max_date])
    prices.each do |price|
      @@db[:prices].insert(:commodity => row[:commodity], :price_date => price[0], :price => price[1])
    end
  end
  @@db.fetch("analyze prices").all
  puts "Done loading prices"
end

.parse_cost(cost) ⇒ Object 



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# File 'lib/ledger_web/db.rb', line 94

def self.parse_cost(cost)
  match = cost.match(/([\d\.-]+) (.+) {(.+)} \[(.+)\]/)
  if match
    amount = match[1].to_f
    price = match[3].gsub(/[^\d\.-]/, '').to_f
    return price * amount
  end
  cost.gsub(/[^\d\.-]/, '')
end

.run_migrations ⇒ Object 



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# File 'lib/ledger_web/db.rb', line 22

def self.run_migrations
  Sequel::Migrator.apply(@@db, File.join(File.dirname(__FILE__), "db/migrate"))

  user_migrations = LedgerWeb::Config.instance.get :user_migrate_dir
  if not user_migrations.nil?
    Sequel::Migrator.run(@@db, user_migrations, :table => "user_schema_changes")
  end
end