Load fewer posts when the android platform is detected

app/assets/javascripts/admin/models/site_setting.js

@@ -1,11 +1,3 @@
-/**
-  Our data model for interacting with site settings.
-
-  @class SiteSetting
-  @extends Discourse.Model
-  @namespace Discourse
-  @module Discourse
-**/
 Discourse.SiteSetting = Discourse.Model.extend({
 
   validationMessage: null,

app/assets/javascripts/discourse/models/post_stream.js

@@ -1,59 +1,17 @@
-/**
-  We use this class to keep on top of streaming and filtering posts within a topic.
-
-  @class PostStream
-  @extends Ember.Object
-  @namespace Discourse
-  @module Discourse
-**/
 Discourse.PostStream = Em.Object.extend({
 
-  /**
-    Are we currently loading posts in any way?
-
-    @property loading
-  **/
   loading: Em.computed.or('loadingAbove', 'loadingBelow', 'loadingFilter', 'stagingPost'),
-
   notLoading: Em.computed.not('loading'),
-
   filteredPostsCount: Em.computed.alias("stream.length"),
 
-  /**
-    Have we loaded any posts?
-
-    @property hasPosts
-  **/
-  hasPosts: function(){
+  hasPosts: function() {
     return this.get('posts.length') > 0;
   }.property("posts.@each"),
 
-  /**
-    Do we have a stream list of post ids?
-
-    @property hasStream
-  **/
   hasStream: Em.computed.gt('filteredPostsCount', 0),
-
-  /**
-    Can we append more posts to our current stream?
-
-    @property canAppendMore
-  **/
   canAppendMore: Em.computed.and('notLoading', 'hasPosts', 'lastPostNotLoaded'),
-
-  /**
-    Can we prepend more posts to our current stream?
-
-    @property canPrependMore
-  **/
   canPrependMore: Em.computed.and('notLoading', 'hasPosts', 'firstPostNotLoaded'),
 
-  /**
-    Have we loaded the first post in the stream?
-
-    @property firstPostPresent
-  **/
   firstPostPresent: function() {
     if (!this.get('hasLoadedData')) { return false; }
     return !!this.get('posts').findProperty('id', this.get('firstPostId'));
@@ -61,47 +19,22 @@ Discourse.PostStream = Em.Object.extend({
 
   firstPostNotLoaded: Em.computed.not('firstPostPresent'),
 
-  /**
-    The first post that we have loaded. Useful for checking to see if we should scroll upwards
-
-    @property firstLoadedPost
-  **/
   firstLoadedPost: function() {
     return _.first(this.get('posts'));
   }.property('posts.@each'),
 
-  /**
-    The last post we have loaded. Useful for checking to see if we should load more
-
-    @property lastLoadedPost
-  **/
   lastLoadedPost: function() {
     return _.last(this.get('posts'));
   }.property('posts.@each'),
 
-  /**
-    Returns the id of the first post in the set
-
-    @property firstPostId
-  **/
   firstPostId: function() {
     return this.get('stream')[0];
   }.property('stream.@each'),
 
-  /**
-    Returns the id of the last post in the set
-
-    @property lastPostId
-  **/
   lastPostId: function() {
     return _.last(this.get('stream'));
   }.property('stream.@each'),
 
-  /**
-    Have we loaded the last post in the stream?
-
-    @property loadedAllPosts
-  **/
   loadedAllPosts: function() {
     if (!this.get('hasLoadedData')) { return false; }
     return !!this.get('posts').findProperty('id', this.get('lastPostId'));
@@ -149,7 +82,7 @@ Discourse.PostStream = Em.Object.extend({
     var firstIndex = this.indexOf(firstPost);
     if (firstIndex === -1) { return []; }
 
-    var startIndex = firstIndex - Discourse.SiteSettings.posts_chunksize;
+    var startIndex = firstIndex - this.get('topic.chunk_size');
     if (startIndex < 0) { startIndex = 0; }
     return stream.slice(startIndex, firstIndex);
 
@@ -173,7 +106,7 @@ Discourse.PostStream = Em.Object.extend({
     if ((lastIndex + 1) >= this.get('highest_post_number')) { return []; }
 
     // find our window of posts
-    return stream.slice(lastIndex+1, lastIndex+Discourse.SiteSettings.posts_chunksize+1);
+    return stream.slice(lastIndex+1, lastIndex + this.get('topic.chunk_size') + 1);
   }.property('lastLoadedPost', 'stream.@each'),
 
 

app/assets/javascripts/discourse/models/site.js

@@ -1,11 +1,3 @@
-/**
-  A data model representing the site (instance of Discourse)
-
-  @class Site
-  @extends Discourse.Model
-  @namespace Discourse
-  @module Discourse
-**/
 Discourse.Site = Discourse.Model.extend({
 
   isReadOnly: Em.computed.alias('is_readonly'),

app/controllers/topics_controller.rb

@@ -47,6 +47,7 @@ class TopicsController < ApplicationController
     opts = params.slice(:username_filters, :filter, :page, :post_number, :show_deleted)
     username_filters = opts[:username_filters]
 
+    opts[:slow_platform] = true if request.user_agent =~ /Android/
     opts[:username_filters] = username_filters.split(',') if username_filters.is_a?(String)
 
     begin
@@ -58,7 +59,7 @@ class TopicsController < ApplicationController
     end
 
     page = params[:page].to_i
-    if (page < 0) || ((page - 1) * SiteSetting.posts_chunksize > @topic_view.topic.highest_post_number)
+    if (page < 0) || ((page - 1) * @topic_view.chunk_size > @topic_view.topic.highest_post_number)
       raise Discourse::NotFound
     end
 

app/serializers/topic_view_serializer.rb

@@ -42,8 +42,8 @@ class TopicViewSerializer < ApplicationSerializer
              :has_deleted,
              :actions_summary,
              :expandable_first_post,
-             :is_warning
-
+             :is_warning,
+             :chunk_size
 
   # Define a delegator for each attribute of the topic we want
   attributes(*topic_attributes)
@@ -113,6 +113,9 @@ class TopicViewSerializer < ApplicationSerializer
     result
   end
 
+  def chunk_size
+    object.chunk_size
+  end
 
   def is_warning
     object.topic.private_message? && object.topic.subtype == TopicSubtype.moderator_warning