Add rattail provider for CORE-POS Integration

and use it to generate CORE Office URLs

rattail_corepos/config.py

@@ -183,26 +183,22 @@ class RattailCOREPOSExtension(ConfigExtension):
 
 
 def core_office_url(config, require=False, **kwargs):
-    """
-    Returns the base URL for the CORE Office web app.  Note that this URL will
-    *not* have a trailing slash.
-    """
-    args = ['corepos', 'office.url']
-    if require:
-        url = config.require(*args, **kwargs)
-        return url.rstrip('/')
-    else:
-        url = config.get(*args, **kwargs)
-        if url:
-            return url.rstrip('/')
+    """ DEPRECATED """
+    warnings.warn("core_office_url() function is deprecated; please use "
+                  "corepos_handler.get_office_url() instead",
+                  DeprecationWarning, stacklevel=2)
+
+    app = config.get_app()
+    corepos = app.get_corepos_handler()
+    return corepos.get_office_url(require=require, **kwargs)
 
 
 def core_office_customer_account_url(config, card_number, office_url=None):
-    """
-    Returns the CORE Office URL for the customer account with the given card
-    number.
-    """
-    if not office_url:
-        office_url = core_office_url(config, require=True)
-    return '{}/mem/MemberEditor.php?memNum={}'.format(
-        office_url, card_number)
+    """ DEPRECATED """
+    warnings.warn("core_office_customer_account_url() function is deprecated; please use "
+                  "corepos_handler.get_office_customer_account_url() instead",
+                  DeprecationWarning, stacklevel=2)
+
+    app = config.get_app()
+    corepos = app.get_corepos_handler()
+    return corepos.get_office_member_url(card_number, office_url=office_url, **kwargs)