Add automatic generation of financial transactions and links

lib/bank_transaction_reference.rb

@@ -0,0 +1,20 @@
+class BankTransactionReference
+
+  # parses a string from a bank transaction field
+  def self.parse(data)
+    m = /(^|\s)FS(?<group>\d+)(\.(?<user>\d+))?(?<parts>([A-Za-z]+\d+(\.\d+)?)+)(\s|$)/.match(data)
+    return unless m
+
+    parts = {}
+    m[:parts].scan(/([A-Za-z]+)(\d+(\.\d+)?)/) do |category, value|
+      value = value.to_f
+      value += parts[category] if parts[category]
+      parts[category] = value
+    end
+
+    ret = { group: m[:group], parts: parts }
+    ret[:user] = m[:user] if m[:user]
+    return ret
+  end
+
+end