webui: field and widget binding refactoring

This is a Web UI wide change. Fields and Widgets binding was refactored
to enable proper two-way binding between them. This should allow to have
one source of truth (field) for multiple consumers - widgets or something
else. One of the goal is to have fields and widget implementations
independent on each other. So that one could use a widget without field
or use one field for multiple widgets, etc..

Basically a fields logic was split into separate components:
- adapters
- parsers & formatters
- binder

Adapters
- extract data from data source (FreeIPA RPC command result)
- prepares them for commands.

Parsers
- parse extracted data to format expected by field
- parse widget value to format expected by field

Formatters
- format field value to format suitable for widgets
- format field value to format suitable for adapter

Binder
- is a communication bridge between field and widget
- listens to field's and widget's events and call appropriate methods

Some side benefits:
- better validation reporting in multivalued widget

Reviewed-By: Adam Misnyovszki <amisnyov@redhat.com>

1 files changed, 16 insertions, 15 deletions

diff --git a/install/ui/src/freeipa/automember.js b/install/ui/src/freeipa/automember.js
index e9619b731..ae7304d95 100644
--- a/install/ui/src/freeipa/automember.js
+++ b/install/ui/src/freeipa/automember.js
@@ -19,6 +19,8 @@
  */
 
 define([
+    'dojo/_base/declare',
+    './field',
     './metadata',
     './ipa',
     './jquery',
@@ -31,7 +33,8 @@ define([
     './search',
     './association',
     './entity'],
-    function(metadata_provider, IPA, $, navigation, phases, reg, rpc, text) {
+    function(declare, field_mod, metadata_provider, IPA, $, navigation,
+        phases, reg, rpc, text) {
 
 var exp = IPA.automember = {};
 
@@ -445,28 +448,26 @@ IPA.automember.parse_condition_regex = function(regex) {
 IPA.automember.condition_field = function(spec) {
 
     spec = spec || {};
+    spec.adapter = spec.adapter || IPA.automember.condition_adapter;
     var that = IPA.field(spec);
+    return that;
+};
 
-    that.attr_name = spec.attribute || that.name;
-
-    that.load = function(record) {
-
-        var regexes = record[that.attr_name];
-        that.values = [];
+IPA.automember.condition_adapter = declare([field_mod.Adapter], {
 
+    load: function(record) {
+        var regexes = this.inherited(arguments);
+        var values = [];
         if (regexes) {
             for (var i=0, j=0; i<regexes.length; i++) {
+                if (regexes[i] === '') continue;
                 var condition = IPA.automember.parse_condition_regex(regexes[i]);
-                that.values.push(condition);
+                values.push(condition);
             }
         }
-
-        that.load_writable(record);
-        that.reset();
-    };
-
-    return that;
-};
+        return values;
+    }
+});
 
 IPA.automember.condition_widget = function(spec) {