Exemple reselect getter/router

exemple.diff

diff --git a/client/app/getters/router.coffee b/client/app/getters/router.coffee
index 50f0cb6..8bd9e24 100644
--- a/client/app/getters/router.coffee
+++ b/client/app/getters/router.coffee
@@ -1,6 +1,7 @@
 Routes       = require '../routes'
 {MessageFilter} = require '../constants/app_constants'
 Immutable = require 'immutable'
+{createSelector} = require 'reselect'
 
 Routes = require '../routes'
 {MessageActions, AccountActions} = require '../constants/app_constants'
@@ -12,7 +13,7 @@ RequestsGetter = require './requests'
 
 Message = require '../models/message'
 
-module.exports =
+module.exports = RouterGetter =
 
     getRouteObject:    (state) -> state.get('route')
     getDefaultAccount: (state) ->
@@ -105,16 +106,15 @@ module.exports =
 
         return Routes.makeURL(action, params, forServer)
 
-    getMessagesList: (state) ->
-        mailboxID = @getMailboxID(state)
-
+    getSortOrder: (state) ->
         sort = @getFilter(state).get('sort')
-        sortOrder = parseInt "#{sort.charAt(0)}1", 10
-
-        filterFunction = @getFilterFunction(state)
+        return parseInt "#{sort.charAt(0)}1", 10
 
+    getMessagesList: createSelector(
+        [RouterGetter.getMailboxID, RouterGetter.getSortOrder,
+         RouterGetter.getFilterFunction, MessageGetter.getAll],
+        (mailboxID, sortOrder, filterFunction, messages) ->
             existingConversations = Immutable.Set()
-        messages = MessageGetter.getAll(state)
             messages = messages.filter (message) ->
 
                 # Display only last Message of conversation
@@ -136,6 +136,7 @@ module.exports =
             messages = messages.reverse() if sortOrder is -1
 
             return messages
+    )
 
     getMessagesListWithIsDeleted: (state) ->
         @getMessagesList(state).map (message) =>
@@ -168,14 +169,18 @@ module.exports =
         message ?= @getPreviousConversation state
         return message
 
-    getFilterFunction: (state) ->
-        return (message) =>
+    getFilterFunction: createSelector(
+        [RouterGetter.isFlagged, RouterGetter.isAttached,
+        RouterGetter.isUnread],
+        (isFlagged, isAttached, isUnread) ->
+            return (message) ->
                 unless message instanceof Message
                     throw new Error('message should be a Message')
-            if @isFlagged(state) then return message.isFlagged()
-            if @isAttached(state) then return message.isAttached()
-            if @isUnread(state) then return message.isUnread()
+                if isFlagged then return message.isFlagged()
+                if isAttached then return message.isAttached()
+                if isUnread then return message.isUnread()
                 return true
+    )
 
     getConversation: (state, conversationID, mailboxID) ->
         mailboxID ?= @getMailboxID(state)
@@ -264,7 +269,10 @@ module.exports =
         else  t 'list empty'