Initial commit

config/initializers/member_levels.rb

@@ -0,0 +1,21 @@
+# encoding: UTF-8
+# frozen_string_literal: true
+
+%w[ deposit withdraw trading ].each do |ability|
+  var = "MINIMUM_MEMBER_LEVEL_FOR_#{ability.upcase}"
+  n   = ENV[var]
+
+  if n.blank?
+    raise ArgumentError, "The variable #{var} is not set."
+  end
+
+  begin
+    Integer(n)
+  rescue ArgumentError
+    raise ArgumentError, "The value of #{var} (#{n.inspect}) is not a valid number."
+  end
+
+  if n.to_i < 0 || n.to_i > 99
+    raise ArgumentError, "The value of #{var} (#{n.inspect}) must be in range of [0, 99]."
+  end
+end