2 * Description: associate with a Get query, maintains the 'Update' query that records pending changes
3 * Copyright (c) 2012 UPMC Sorbonne Universite - INRIA
7 // xxx this is ongoing work, very rough, and not working at all yet
11 $.fn.Updater = function ( method ) {
12 /* Method calling logic */
13 if ( methods[method] ) {
14 return methods[ method ].apply( this, Array.prototype.slice.call( arguments, 1 ));
15 } else if ( typeof method === 'object' || ! method ) {
16 return methods.init.apply( this, arguments );
18 $.error( 'Method ' + method + ' does not exist on $.Updater' );
23 init : function( options ) {
24 return this.each(function(){
26 var updater = new Updater (options);
27 $this.data('Updater',updater);
28 /* Subscribe to query updates */
29 var results_channel = '/results/' + options.query_uuid + '/changed';
30 $.subscribe(results_channel, function (e,rows) { updater.update_slice (e,rows); } );
33 destroy : function( ) {
34 return this.each(function(){
36 $(window).unbind('Updater');
37 data.Updater.remove();
38 $this.removeData('Updater');
42 show : function( content ) { }
45 function Updater (options) {
47 // xxx should try to locate update_query first, in case we have several Updaters
49 // however the mental model behind the global manifold object for now is
50 // to unambiguously find a query based on its query_uuid, which in the joomla
51 // implementation wouldn't fly
52 // we keep this for a later improvement
53 var query=manifold.find_query (options.query_uuid);
54 messages.info("retrieved query " + query.__repr());
55 // very rough way of filling this for now
57 new ManifoldQuery ("update", query.subject, null, query.filters,
60 undefined, /* unique */
62 undefined, undefined /* maybe some day I'll get that one */);
63 // arm button once document is loaded
64 (function(updater) {$(document).ready(function(){updater.arm_button()})})(this);
66 this.arm_button = function () {
67 $('#updater-' + this.options.plugin_uuid).click(this, this.submit_update_request);
69 this.submit_update_request = function (e) {
70 messages.debug("submit_update_request");
71 var query_uuid = e.data.options.query_uuid;
72 var update_query = e.data.update_query;
73 $.publish("/messages/debug","Updater.submit_update_request " + update_query.__repr());
74 // publish results as if coming from the original query
75 manifold.asynchroneous_exec ( [ {'query_uuid': query_uuid, 'publish_uuid' : update_query.query_uuid} ]);
76 // looks like a previous attempt to disable the button while the query is flying
77 //$('#updateslice-' + options.plugin_uuid).prop('disabled', true);
80 update_resources = function (e, resources, change) {
81 data = e.data.instance.data().Slices;
83 data.update_query.params['resource'] = resources
84 $.publish('/update/' + data.options.query_uuid, [data.update_query, true]);
87 update_leases = function (e, leases, change) {
88 data = e.data.instance.data().Slices;
90 data.update_query.params['lease'] = leases
91 $.publish('/update/' + data.options.query_uuid, [data.update_query, true]);
94 update_slice = function (e, rows, query) {
96 /* This function is called twice : get and update */
99 var data = e.data.instance.data().Slices;
101 /* Update placeholders and trigger subqueries updates */
102 if (rows.length == 0) {
109 if (data.update_query == null) {
110 data.update_query = new Query('update','slice', 'now', query.filter, {"resource": null, "lease": null}, query.fields, 0, data.options.query_uuid);
112 /* In case of update the list of resources and leases should be updated accordingly */
115 $.each(slice, function(key, value) {
116 if (typeof value == 'string') {
117 $('#myslice__' + key).html(value);
121 /* TODO avoid repetitions + made this code generic and plugin-independent */
123 if (query.method == 'update') {
124 // XXX NON, les uuid doivent etre les memes que dans la query Get, cet appel devrait etre fait avant.
125 query.analyzed_subqueries();
128 /* NOTE: Dans le cadre d'un update, on n'a pas besoin de refaire tout
129 * le query plan et obtenir toutes les infos, par contre on ne peut pas
130 * savoir d'avance quels parametres ont été accordés, changés, etc.
131 * Dans le cas général, ca pourrait affecter le query plan...
132 * Par contre on n'a pas d'information sur toutes les resources, mais
133 * uniquement celles dans la liste. Comment gérer ?
136 /* Inform child plugins about their respective parts of the results */
138 var r_subq = query.analyzed_query.subqueries['resource'];
139 var l_subq = query.analyzed_query.subqueries['lease'];
140 $.publish('/results/' + r_subq.uuid + '/changed', [slice['resource'], r_subq]);
141 $.publish('/results/' + l_subq.uuid + '/changed', [slice['lease'], l_subq]);
143 /* Subscribe to get notifications from child plugins */
144 if (!data.child_subscribe) {
145 $.subscribe('/update-set/' + r_subq.uuid, {instance: e.data.instance}, update_resources);
146 $.subscribe('/update-set/' + l_subq.uuid, {instance: e.data.instance}, update_leases);
147 data.child_subscribe = true