[IMP] mail: Discuss: lookup in JS cache before doing RPC

When opening a new DM from the Discuss sidebar or from a chat window, and
when inviting people to a channel, first search for a match in the prefetched
partners (basically, the employees), and only perform the im_search RPC
(extending the research to all users) if there is no match.

Also sort the results by name.

addons/mail/static/src/js/chat_manager.js

@@ -934,16 +934,28 @@ var chat_manager = {
     },
 
     search_partner: function (search_val, limit) {
-        return PartnerModel.call('im_search', [search_val, limit || 20], {}, {shadow: true}).then(function(result) {
-            var values = [];
-            _.each(result, function(user) {
-                var escaped_name = _.escape(user.name);
-                values.push(_.extend(user, {
-                    'value': escaped_name,
-                    'label': escaped_name,
-                }));
+        var def = $.Deferred();
+        var values = [];
+        // search among prefetched partners
+        var search_regexp = new RegExp(utils.unaccent(search_val), 'i');
+        _.each(mention_partner_suggestions, function (partners) {
+            if (values.length < limit) {
+                values = values.concat(_.filter(partners, function (partner) {
+                    return session.partner_id !== partner.id && search_regexp.test(partner.name);
+                })).splice(0, limit);
+            }
+        });
+        if (!values.length) {
+            // extend the research to all users
+            def = PartnerModel.call('im_search', [search_val, limit || 20], {}, {shadow: true});
+        } else {
+            def = $.when(values);
+        }
+        return def.then(function (values) {
+            var autocomplete_data = _.map(values, function (value) {
+                return { id: value.id, value: value.name, label: value.name };
             });
-            return values;
+            return _.sortBy(autocomplete_data, 'label');
         });
     },
 };

addons/mail/static/src/js/client_action.js

@@ -56,13 +56,12 @@ var PartnerInviteDialog = Dialog.extend({
                 return $('<span>').text(item.text).prepend(status);
             },
             query: function (query) {
-                chat_manager.search_partner(query.term, 20).then(function(result){
-                    var data = [];
-                    _.each(result, function(partner){
-                        partner.text = partner.name;
-                        data.push(partner);
+                chat_manager.search_partner(query.term, 20).then(function (partners) {
+                    query.callback({
+                        results: _.map(partners, function (partner) {
+                            return _.extend(partner, { text: partner.label });
+                        }),
                     });
-                    query.callback({results: data});
                 });
             }
         });
@@ -331,13 +330,12 @@ var ChatAction = Widget.extend(ControlPanelMixin, {
             focus: function(event) {
                 event.preventDefault();
             },
-            html: true,
         });
 
         this.$('.o_mail_add_channel[data-type=dm]').find("input").autocomplete({
             source: function(request, response) {
                 self.last_search_val = _.escape(request.term);
-                chat_manager.search_partner(self.last_search_val).done(response);
+                chat_manager.search_partner(self.last_search_val, 10).done(response);
             },
             select: function(event, ui) {
                 var partner_id = ui.item.id;
@@ -346,7 +344,6 @@ var ChatAction = Widget.extend(ControlPanelMixin, {
             focus: function(event) {
                 event.preventDefault();
             },
-            html: true,
         });
 
         this.$('.o_mail_add_channel[data-type=private]').find("input").on('keyup', this, function (event) {