Restructure the src directory

It is split into
- /libgnucash (for the non-gui bits)
- /gnucash (for the gui)
- /common (misc source files used by both)
- /bindings (currently only holds python bindings)

This is the first step in restructuring the code. It will need much
more fine tuning later on.

bindings/python/example_scripts/gncinvoicefkt.py

@@ -0,0 +1,116 @@
+#!/usr/bin/env python
+# -*- coding: UTF-8 -*-
+
+##@file
+# @brief some help for working with invoices, used in \ref py_invoice_export
+# @ingroup python_bindings_examples
+# @author Christoph Holtermann (c.holtermann (at) gmx.de)
+# @date 2014-11
+#
+# @details
+# Credits to Tom Loft for the query to get_all_invoices
+# as used in his REST-Api
+#
+# Issues:
+# - get_all_invoices could be added as a method to book Class
+# - get_all_customers should be a query like get_all_invoices
+
+try:
+    import gnucash
+    from gnucash.gnucash_business import Customer, Employee, Vendor, Job, \
+        Address, Invoice, Entry, TaxTable, TaxTableEntry, GNC_AMT_TYPE_PERCENT, \
+            GNC_DISC_PRETAX
+    import str_methods
+except ImportError as import_error:
+    print "Problem importing modules."
+    print import_error
+    sys.exit(2)
+
+def get_all_lots(account):
+  """Return all lots in account and descendants"""
+  ltotal=[]
+  descs = account.get_descendants()
+  for desc in descs:
+    if type(desc).__name__ == 'SwigPyObject':
+        desc = gnucash.Account(instance=desc)
+    ll=desc.GetLotList()
+    ltotal+=ll
+  return ltotal
+
+def get_all_invoices_from_lots(account):
+  """Return all invoices in account and descendants
+
+  This is based on lots. So invoices without lots will be missed."""
+
+  lot_list=get_all_lots(account)
+  invoice_list=[]
+  for lot in lot_list:
+    if type(lot).__name__ == 'SwigPyObject':
+        lot = gnucash.GncLot(instance=lot)
+
+    invoice=gnucash.gnucash_core_c.gncInvoiceGetInvoiceFromLot(lot.instance)
+    if invoice:
+      invoice_list.append(Invoice(instance=invoice))
+  return invoice_list
+
+def get_all_invoices(book, is_paid=None, is_active=None):
+    """Returns a list of all invoices in the book.
+
+    posts a query to search for all invoices.
+
+    arguments:
+        book                the gnucash book to work with
+    keyword-arguments:
+        is_paid     int     1 to search for invoices having been paid, 0 for not, None to ignore.
+        is_active   int     1 to search for active invoices
+    """
+
+    query = gnucash.Query()
+    query.search_for('gncInvoice')
+    query.set_book(book)
+
+    if is_paid == 0:
+        query.add_boolean_match([gnucash.INVOICE_IS_PAID], False, gnucash.QOF_QUERY_AND)
+    elif is_paid == 1:
+        query.add_boolean_match([gnucash.INVOICE_IS_PAID], True, gnucash.QOF_QUERY_AND)
+    elif is_paid == None:
+        pass
+
+    # active = JOB_IS_ACTIVE
+    if is_active == 0:
+        query.add_boolean_match(['active'], False, gnucash.QOF_QUERY_AND)
+    elif is_active == 1:
+        query.add_boolean_match(['active'], True, gnucash.QOF_QUERY_AND)
+    elif is_active == None:
+        pass
+
+    # return only invoices (1 = invoices)
+    pred_data = gnucash.gnucash_core.QueryInt32Predicate(gnucash.QOF_COMPARE_EQUAL, 1)
+    query.add_term([gnucash.INVOICE_TYPE], pred_data, gnucash.QOF_QUERY_AND)
+
+    invoice_list = []
+
+    result = query.run()
+    for result in query.run():
+        invoice_list.append(Invoice(instance=result))
+
+    query.destroy()
+
+    return invoice_list
+
+def get_all_customers(book):
+    """Returns all customers in book.
+
+    Counts IDs upwards. May miss customers with irregular IDs.
+    Should be replaced by query as in get_all_invoices."""
+
+    customer_list = []
+    customer = True
+    customer_id = 0
+    while customer:
+        customer_id += 1
+        customer = book.CustomerLookupByID('%06d' % customer_id)
+        if customer:
+            customer_list.append(customer)
+
+    return customer_list