path: root/bank-eiffel/bank.e

class
	BANK

create
	run

feature {NONE} -- Implementation

	store: BANK_STORE

	over: BOOLEAN

	last_error: STRING

	data_file: RAW_FILE

	data_filename: STRING = "bank.data"

	fd: FORMAT_DOUBLE

feature {NONE} -- Initialization

	run
		do
			create fd.make(2, 2)
			create store.make(100)
			store.ranges.account.interest_deposit := [0.01, 0.04]
			store.ranges.account.interest_debit := [0.02, 0.1]
			store.ranges.account.creditline := [-1000.0, 0.0]
			store.ranges.studentaccount.interest_deposit := [0.02, 0.03]
			store.ranges.studentaccount.interest_debit := [0.03, 0.06]
			store.ranges.studentaccount.creditline := [-300.0, 0.0]
			store.ranges.retireeaccount.interest_deposit := [0.02, 0.03]
			store.ranges.retireeaccount.interest_debit := [0.03, 0.06]
			store.ranges.retireeaccount.creditline := [-300.0, 0.0]
			create last_error.make_empty

			create data_file.make (data_filename)
			if data_file.exists then
				data_file.open_read
				store ?= store.retrieved (data_file)
				data_file.close
			end

			session

			if data_file.is_creatable then
				data_file.open_write
				store.independent_store (data_file)
				data_file.close
			end
		end

feature -- Basic operations

	session
		do
			from
			until
				over
			loop
				main_screen
			end
		end

	print_last_error
		do
			if not last_error.is_empty then
				print ("Error: " + last_error + "%N%N")
				last_error := ""
			end
		end

	print_header
		do
			clear_screen
			print ("**************************************%N")
			print ("*********    BANK of FOOP    *********%N")
			print ("**************************************%N")
		end

	clear_screen
		do
			io.put_character ((0x1B).to_character_8)
			io.put_string ("[2J")
			io.put_character ((0x1B).to_character_8)
			io.put_string ("[H")
		end

	main_screen
		do
			print_header
			print ("Operations:%N")
			print ("  r ...list/edit global ranges%N")
			print ("  p ...list/create/edit/delete persons%N")
			print ("  a ...list/create/edit/delete accounts%N")
			print ("  q ...quit%N")
			print ("%N")
			print_last_error
			print ("Enter a command, followed by <return>: ")
			io.read_character
			io.next_line

			inspect io.last_character.lower
			when 'r' then
				ranges_screen
			when 'p' then
				persons_screen
			when 'a' then
				accounts_screen
			when 'q' then
				over := True
			else
				last_error := "Error: Unknown command '" + io.last_character.out + "'"
			end
			print ("%N%N")
		end

	ranges_screen
		local
			back: BOOLEAN
		do
			from
			until
				back
			loop
				print_header
				print ("Global Ranges:%N")
				print ("  Account:%N")
				print_ranges(store.ranges.account)
				print ("  Student account:%N")
				print_ranges(store.ranges.studentaccount)
				print ("  Retiree account:%N")
				print_ranges(store.ranges.retireeaccount)
				print ("%N")
				print ("Operations:%N")
				print ("  a ...edit account ranges%N")
				print ("  s ...edit student account ranges%N")
				print ("  r ...edit retiree account ranges%N")
				print ("  b ...back%N")
				print ("%N")
				print_last_error
				print ("Enter a command, followed by <return>: ")
				io.read_character
				io.next_line

				inspect io.last_character.lower
				when 'a' then
					edit_ranges("account", store.ranges.account)
				when 's' then
					edit_ranges("student account", store.ranges.studentaccount)
				when 'r' then
					edit_ranges("retiree account", store.ranges.retireeaccount)
				when 'b' then
					back := True
				else
					last_error := "Error: Unknown command '" + io.last_character.out + "'"
				end
				print ("%N%N")
			end
		end

	print_ranges(range: like {BANK_STORE}.account_range)
		do
			print ("    - Interest deposit: " + print_range(range.interest_deposit) + "%N")
			print ("    - Interest debit: " + print_range(range.interest_debit) + "%N")
			print ("    - Creditline: " + print_range(range.creditline) + "%N")
		end

	print_range(range: like {BANK_STORE}.range): STRING_8
		do
			Result := "[" + fd.formatted(range.min) + ", " + fd.formatted(range.max) + "]"
		end

	edit_ranges(type: STRING_8; range: like {BANK_STORE}.account_range)
		do
			print ("%N")
			print ("Edit " + type + " range:%N")
			edit_range("interest depost", range.interest_deposit)
			edit_range("interest debit", range.interest_debit)
			edit_range("creditline", range.creditline)
		end

	edit_range(type: STRING_8; range: like {BANK_STORE}.range)
		do
			print ("Enter " + type + " minimum [" + fd.formatted(range.min) + "]: ")
			io.readline
			if io.last_string.is_double then
				range.min := io.last_string.to_double
			end

			print ("Enter " + type + " maximum [" + fd.formatted(range.max) + "]: ")
			io.readline
			if io.last_string.is_double then
				range.max := io.last_string.to_double
			end
		end

	persons_screen
		local
			back: BOOLEAN
		do
			from
			until
				back
			loop
				print_header
				print ("Operations:%N")
				print ("  l ...list persons%N")
				print ("  c ...create person%N")
				print ("  e ...edit person%N")
				print ("  d ...delete person%N")
				print ("  b ...back%N")
				print ("%N")
				print_last_error
				print ("Enter a command, followed by <return>: ")
				io.read_character
				io.next_line

				inspect io.last_character.lower
				when 'l' then
					list_persons
					print ("Press <return> to go back")
					io.read_line
				when 'c' then
					create_persons
				when 'e' then
					edit_person
				when 'd' then
					delete_person
				when 'b' then
					back := True
				else
					last_error := "Error: Unknown command '" + io.last_character.out + "'"
				end
				print ("%N%N")
			end
		end

	list_persons
		do
			print ("%N")
			print ("Persons: " + store.persons.count.out + "%N")
			from
				store.persons.start
			until
				store.persons.off
			loop
				print ("#" + store.persons.index.out + " " + store.persons.item.surname + ", " + store.persons.item.firstname)
				if attached {RETIREE} store.persons.item then
					print (" (RETIREE)")
				elseif attached {STUDENT} store.persons.item then
					print (" (STUDENT)")
				end
				print ("%N")
				store.persons.forth
			end
			print ("%N")
		end

	create_persons
		local
			back: BOOLEAN
			firstname: STRING
			surname: STRING
		do
			from
			until
				back
			loop
				print_header
				print ("Operations:%N")
				print ("  p ...create person%N")
				print ("  s ...create student%N")
				print ("  r ...create retiree%N")
				print ("  b ...back%N")
				print ("%N")
				print_last_error
				print ("Enter a command, followed by <return>: ")
				io.read_character
				io.next_line

				inspect io.last_character.lower
				when 'p', 's', 'r' then
					print ("Enter surname: ")
					io.readline
					surname := io.last_string.twin

					print ("Enter firstname: ")
					io.readline
					firstname := io.last_string.twin

					inspect io.last_character.lower
					when 'p' then
						store.persons.put(create {PERSON}.make(surname, firstname))
					when 's' then
						store.persons.put(create {STUDENT}.make(surname, firstname))
					when 'r' then
						store.persons.put(create {RETIREE}.make(surname, firstname))
					else
					end
					last_error := "Person (#" + store.persons.count.out + ") created successfully"
					back := True
				when 'b' then
					back := True
				else
					last_error := "Error: Unknown command '" + io.last_character.out + "'"
				end
				print ("%N%N")
			end
		rescue
			if not (create {EXCEPTIONS}).is_signal then
				last_error := "Exception: " + (create {EXCEPTIONS}).tag_name
				retry
			end
		end

	edit_person
		local
			back: BOOLEAN
			num: INTEGER
		do
			list_persons
			from
			until
				back
			loop
				print_last_error
				print ("Enter person id (b ...back): ")
				io.readline
				io.last_string.to_lower
				if io.last_string.is_integer then
					num := io.last_string.to_integer
					if store.persons.valid_index (num) then
						store.persons.go_i_th (num)

						print ("Enter surname [" + store.persons.item.surname + "]: ")
						io.readline
						if not io.last_string.is_empty then
							store.persons.item.surname := io.last_string.twin
						end

						print ("Enter firstname [" + store.persons.item.firstname + "]: ")
						io.readline
						if not io.last_string.is_empty then
							store.persons.item.firstname := io.last_string.twin
						end
						last_error := "Person (#" + num.out + ") edited successfully"
						back := True
					else
						last_error := "Invalid person id"
					end
				elseif io.last_string.is_equal ("b") then
					back := True
				else
					last_error := "Not a number"
				end
			end
		end

	delete_person
		local
			back: BOOLEAN
		do
			list_persons
			from
			until
				back
			loop
				print_last_error
				print ("Enter person id (b ...back): ")
				io.readline
				io.last_string.to_lower
				if io.last_string.is_integer then
					if store.persons.valid_index (io.last_string.to_integer) then
						store.persons.go_i_th (io.last_string.to_integer)
						store.persons.remove
						last_error := "Person (#" + io.last_string + ") removed successfully"
						back := True
					else
						last_error := "Invalid person id"
					end
				elseif io.last_string.is_equal ("b") then
					back := True
				else
					last_error := "Not a number"
				end
			end
		end

	accounts_screen
		local
			back: BOOLEAN
			done: BOOLEAN
		do
			from
			until
				back
			loop
				print_header
				print ("Operations:%N")
				print ("  l ...list accounts%N")
				print ("  c ...create account%N")
				print ("  e ...edit account%N")
				print ("  d ...delete account%N")
				print ("  b ...back%N")
				print ("%N")
				print_last_error
				print ("Enter a command, followed by <return>: ")
				io.read_character
				io.next_line

				inspect io.last_character.lower
				when 'l' then
					list_accounts

					from
						done := False
					until
						back or done
					loop
						print ("Enter account id for details (b ...back): ")
						io.readline
						io.last_string.to_lower
						if io.last_string.is_integer then
							if store.accounts.valid_index (io.last_string.to_integer) then
								store.accounts.go_i_th (io.last_string.to_integer)
								print ("%N")
								print ("Account #" + store.accounts.index.out + ":%N")
								list_account_details(store.accounts.item)
								print ("Press <return> to go back")
								io.read_line
								done := True
							else
								print ("Invalid account id%N%N")
							end
						elseif io.last_string.is_equal("b") then
							done := True
						else
							print ("Not a number%N%N")
						end
					end
				when 'c' then
					create_accounts
				when 'e' then
					edit_accounts
				when 'd' then
					delete_account
				when 'b' then
					back := True
				else
					last_error := "Error: Unknown command '" + io.last_character.out + "'"
				end
				print ("%N%N")
			end
		end

	list_accounts
		local
			account: ACCOUNT
			person: PERSON
		do
			print ("%N")
			print ("Accounts: " + store.accounts.count.out + "%N")
			from
				store.accounts.start
			until
				store.accounts.off
			loop
				account := store.accounts.item
				account.get_authorized_signers.linear_representation.start
				person := account.get_authorized_signers.linear_representation.item

				print ("#" + store.accounts.index.out + " " + person.surname + ", " + person.firstname)
				if attached {RETIREEACCOUNT} account then
					print (" (RETIREE ACCOUNT)")
				elseif attached {STUDENTACCOUNT} account then
					print (" (STUDENT ACCOUNT)")
				end
				print ("%N")

				store.accounts.forth
			end
			print ("%N")
		end

	list_account_details(account: ACCOUNT)
		local
			person: PERSON
			range: like {BANK_STORE}.account_range
		do
			range := store.ranges.account
			if attached {RETIREEACCOUNT} account then
				range := store.ranges.retireeaccount
			elseif attached {STUDENTACCOUNT} account then
				range := store.ranges.studentaccount
			end

			print ("  - Balance: " + fd.formatted(account.balance) + "%N")
			print ("  - Interest deposit: " + fd.formatted(account.interest_deposit) + " " + print_range(range.interest_deposit) + "%N")
			print ("  - Interest debit: " + fd.formatted(account.interest_debit) + " " + print_range(range.interest_debit) +"%N")
			print ("  - Creditline: " + fd.formatted(account.creditline) + " " + print_range(range.creditline) +"%N")
			print ("  - Authorized signers:%N")
			from
				account.get_authorized_signers.linear_representation.start
			until
				account.get_authorized_signers.linear_representation.off
			loop
				person := account.get_authorized_signers.linear_representation.item
				print ("    - #" + account.get_authorized_signers.linear_representation.index.out + " " + person.surname + ", " + person.firstname)
				if attached {RETIREE} person then
					print (" (RETIREE)")
				elseif attached {STUDENT} person then
					print (" (STUDENT)")
				end
				print ("%N")
				account.get_authorized_signers.linear_representation.forth
			end

			print ("  - Type: ")
			if attached {RETIREEACCOUNT} account then
				print ("Retiree account")
			elseif attached {STUDENTACCOUNT} account then
				print ("Student account")
			else
				print ("Account")
			end
			print ("%N%N")
		end

	create_accounts
		local
			back: BOOLEAN
		do
			from
			until
				back
			loop
				print_header
				print ("Operations:%N")
				print ("  a ...create account%N")
				print ("  s ...create student account%N")
				print ("  r ...create retiree account%N")
				print ("  b ...back%N")
				print ("%N")
				print_last_error
				print ("Enter a command, followed by <return>: ")
				io.read_character
				io.next_line

				inspect io.last_character.lower
				when 'a' then
					back := create_account('a', store.ranges.account)
				when 's' then
					back := create_account('s', store.ranges.studentaccount)
				when 'r' then
					back := create_account('r', store.ranges.retireeaccount)
				when 'b' then
					back := True
				else
					last_error := "Error: Unknown command '" + io.last_character.out + "'"
				end
				print ("%N%N")
			end
		rescue
			if not (create {EXCEPTIONS}).is_signal then
				last_error := "Exception: " + (create {EXCEPTIONS}).tag_name
				retry
			end
		end

	create_account(type: CHARACTER; range: like {BANK_STORE}.account_range): BOOLEAN
		local
			back: BOOLEAN
			next: BOOLEAN
			interest_deposit: like {ACCOUNT}.interest_deposit
			interest_debit: like {ACCOUNT}.interest_debit
			creditline: like {ACCOUNT}.creditline
		do
			Result := false
			interest_deposit := (range.interest_deposit.min + range.interest_deposit.max) / 2
			interest_debit := (range.interest_debit.min + range.interest_debit.max) / 2
			creditline := (range.creditline.min + range.creditline.max) / 2

			print_last_error
			from
				next := False
				list_persons
			until
				back or next
			loop
				print ("Enter person (authorized signer) id (b ...back): ")
				io.readline
				io.last_string.to_lower
				if io.last_string.is_integer then
					if store.persons.valid_index (io.last_string.to_integer) then
						store.persons.go_i_th (io.last_string.to_integer)
						next := True
					else
						print ("Invalid person id%N%N")
					end
				elseif io.last_string.is_equal ("b") then
					back := True
				else
					print ("Not a number%N%N")
				end
			end

			from
				next := False
			until
				back or next
			loop
				print ("Enter interest deposit " + print_range(range.interest_deposit) + " [" + fd.formatted(interest_deposit) + "] (b ...back): ")
				io.readline
				io.last_string.to_lower
				if io.last_string.is_empty then
					next := True
				elseif io.last_string.is_double then
					interest_deposit := io.last_string.to_double
					next := True
				elseif io.last_string.is_equal ("b") then
					back := True
				else
					print ("Invalid interest deposit number%N%N")
				end
			end

			from
				next := False
			until
				back or next
			loop
			print ("Enter interest debit " + print_range(range.interest_debit) + " [" + fd.formatted(interest_debit) + "] (b ...back):")
				io.readline
				io.last_string.to_lower
				if io.last_string.is_empty then
					next := True
				elseif io.last_string.is_double then
					interest_debit := io.last_string.to_double
					next := True
				elseif io.last_string.is_equal ("b") then
					back := True
				else
					print ("Invalid interest debit number%N%N")
				end
			end

			from
				next := False
			until
				back or next
			loop
				print ("Enter creditline " + print_range(range.creditline) + " [" + fd.formatted(creditline) + "] (b ...back): ")
				io.readline
				io.last_string.to_lower
				if io.last_string.is_empty then
					next := True
				elseif io.last_string.is_double then
					creditline := io.last_string.to_double
					next := True
				elseif io.last_string.is_equal ("b") then
					back := True
				else
					print ("Invalid creditline number%N%N")
				end
			end

			if not back then
				inspect type
				when 'a' then
					store.accounts.put(create {ACCOUNT}.make(store.persons.item,
						interest_deposit, interest_debit, creditline,
						range.interest_deposit, range.interest_debit, range.creditline))
				when 's' then
					store.accounts.put(create {STUDENTACCOUNT}.make(store.persons.item,
						interest_deposit, interest_debit, creditline,
						range.interest_deposit, range.interest_debit, range.creditline))
				when 'r' then
					store.accounts.put(create {RETIREEACCOUNT}.make(store.persons.item,
						interest_deposit, interest_debit, creditline,
						range.interest_deposit, range.interest_debit, range.creditline))
				else
				end
				last_error := "Account (#" + store.accounts.count.out + ") created successfully"
				Result := true
				back := True
			end
		end

	edit_accounts
		local
			back: BOOLEAN
		do
			list_accounts
			from
			until
				back
			loop
				print_last_error
				print ("Enter account id (b ...back): ")
				io.readline
				io.last_string.to_lower
				if io.last_string.is_integer then
					if store.accounts.valid_index (io.last_string.to_integer) then
						store.accounts.go_i_th (io.last_string.to_integer)
						edit_account(store.accounts.index, store.accounts.item)
						back := True
					else
						last_error := "Invalid account id"
					end
				elseif io.last_string.is_equal ("b") then
					back := True
				else
					last_error := "Not a number"
				end
			end
		end

	edit_account(index: INTEGER; account: ACCOUNT)
		local
			back: BOOLEAN
		do
			from
			until
				back
			loop
				print_header
				print ("Edit account #" + index.out + ":%N")
				list_account_details (account)

				print ("Operations:%N")
				print ("  1 ...edit interest deposit%N")
				print ("  2 ...edit interest debit%N")
				print ("  3 ...edit creditline%N")
				print ("  4 ...add authorized signer%N")
				print ("  5 ...remove authorized signer%N")
				print ("  6 ...deposit%N")
				print ("  7 ...withdraw%N")
				print ("  8 ...transfer%N")
				print ("  9 ...advance%N")
				print ("  b ...back%N")
				print ("%N")
				print_last_error
				print ("Enter a command, followed by <return>: ")
				io.read_character
				io.next_line

				inspect io.last_character.lower
				when '1' then
				when '2' then
				when '3' then
				when '4' then
				when '5' then
				when '6' then
				when '7' then
				when '8' then
				when '9' then
				when 'b' then
					back := True
				else
					last_error := "Error: Unknown command '" + io.last_character.out + "'"
				end
				print ("%N%N")
			end
		end

	delete_account
		local
			back: BOOLEAN
		do
			list_accounts
			from
			until
				back
			loop
				print_last_error
				print ("Enter account id (b ...back): ")
				io.readline
				io.last_string.to_lower
				if io.last_string.is_integer then
					if store.accounts.valid_index (io.last_string.to_integer) then
						store.accounts.go_i_th (io.last_string.to_integer)
						store.accounts.remove
						last_error := "Account (#" + io.last_string + ") removed successfully"
						back := True
					else
						last_error := "Invalid account id"
					end
				elseif io.last_string.is_equal ("b") then
					back := True
				else
					last_error := "Not a number"
				end
			end
		end
end