util.adhoc: New util for generating common adhoc handler patterns

diff --git a/util/adhoc.lua b/util/adhoc.lua
new file mode 100644 (file)
index 0000000..671e85c
--- /dev/null
+++ b/util/adhoc.lua
@@ -0,0 +1,31 @@
+local function new_simple_form(form, result_handler)
+       return function(self, data, state)
+               if state then
+                       if data.action == "cancel" then
+                               return { status = "canceled" };
+                       end
+                       local fields, err = form:data(data.form);
+                       return result_handler(fields, err, data);
+               else
+                       return { status = "executing", actions = {"next", "complete", default = "complete"}, form = form }, "executing";
+               end
+       end
+end
+
+local function new_initial_data_form(form, initial_data, result_handler)
+       return function(self, data, state)
+               if state then
+                       if data.action == "cancel" then
+                               return { status = "canceled" };
+                       end
+                       local fields, err = form:data(data.form);
+                       return result_handler(fields, err, data);
+               else
+                       return { status = "executing", actions = {"next", "complete", default = "complete"},
+                                form = { layout = form, values = initial_data() } }, "executing";
+               end
+       end
+end
+
+return { new_simple_form = new_simple_form,
+        new_initial_data_form = new_initial_data_form };