FEATURE: track statistics around post creation

- how long were people typing?
- how long was composer open?
- how many drafts were created?
- correct, draft saved to go away after you continue typing

store in Post.find(xyz).post_stat

app/assets/javascripts/discourse/controllers/composer.js.es6

@@ -413,7 +413,7 @@ export default Ember.ObjectController.extend(Presence, {
       }
 
       // we need a draft sequence for the composer to work
-      if (opts.draftSequence === void 0) {
+      if (opts.draftSequence === undefined) {
         return Discourse.Draft.get(opts.draftKey).then(function(data) {
           opts.draftSequence = data.draft_sequence;
           opts.draft = data.draft;

app/assets/javascripts/discourse/models/composer.js.es6

@@ -22,7 +22,9 @@ const CLOSED = 'closed',
         topic_id: 'topic.id',
         is_warning: 'isWarning',
         archetype: 'archetypeId',
-        target_usernames: 'targetUsernames'
+        target_usernames: 'targetUsernames',
+        typing_duration_msecs: 'typingTime',
+        composer_open_duration_msecs: 'composerTime'
       },
 
       _edit_topic_serializer = {
@@ -52,6 +54,31 @@ const Composer = RestModel.extend({
   viewOpen: Em.computed.equal('composeState', OPEN),
   viewDraft: Em.computed.equal('composeState', DRAFT),
 
+  composeStateChanged: function() {
+    var oldOpen = this.get('composerOpened');
+
+    if (this.get('composeState') === OPEN) {
+      this.set('composerOpened', oldOpen || new Date());
+    } else {
+      if (oldOpen) {
+        var oldTotal = this.get('composerTotalOpened') || 0;
+        this.set('composerTotalOpened', oldTotal + (new Date() - oldOpen));
+      }
+      this.set('composerOpened', null);
+    }
+  }.observes('composeState'),
+
+  composerTime: function() {
+    var total = this.get('composerTotalOpened') || 0;
+
+    var oldOpen = this.get('composerOpened');
+    if (oldOpen) {
+      total += (new Date() - oldOpen);
+    }
+
+    return total;
+  }.property().volatile(),
+
   archetype: function() {
     return this.get('archetypes').findProperty('id', this.get('archetypeId'));
   }.property('archetypeId'),
@@ -60,6 +87,12 @@ const Composer = RestModel.extend({
     return this.set('metaData', Em.Object.create());
   }.observes('archetype'),
 
+  // view detected user is typing
+  typing: _.throttle(function(){
+    var typingTime = this.get("typingTime") || 0;
+    this.set("typingTime", typingTime + 100);
+  }, 100, {leading: false, trailing: true}),
+
   editingFirstPost: Em.computed.and('editingPost', 'post.firstPost'),
   canEditTitle: Em.computed.or('creatingTopic', 'creatingPrivateMessage', 'editingFirstPost'),
   canCategorize: Em.computed.and('canEditTitle', 'notCreatingPrivateMessage'),
@@ -349,7 +382,9 @@ const Composer = RestModel.extend({
       composeState: opts.composerState || OPEN,
       action: opts.action,
       topic: opts.topic,
-      targetUsernames: opts.usernames
+      targetUsernames: opts.usernames,
+      composerTotalOpened: opts.composerTime,
+      typingTime: opts.typingTime
     });
 
     if (opts.post) {
@@ -420,7 +455,10 @@ const Composer = RestModel.extend({
       post: null,
       title: null,
       editReason: null,
-      stagedPost: false
+      stagedPost: false,
+      typingTime: 0,
+      composerOpened: null,
+      composerTotalOpened: 0
     });
   },
 
@@ -502,7 +540,9 @@ const Composer = RestModel.extend({
       admin: user.get('admin'),
       yours: true,
       read: true,
-      wiki: false
+      wiki: false,
+      typingTime: this.get('typingTime'),
+      composerTime: this.get('composerTime')
     });
 
     this.serialize(_create_serializer, createdPost);
@@ -603,13 +643,20 @@ const Composer = RestModel.extend({
       postId: this.get('post.id'),
       archetypeId: this.get('archetypeId'),
       metaData: this.get('metaData'),
-      usernames: this.get('targetUsernames')
+      usernames: this.get('targetUsernames'),
+      composerTime: this.get('composerTime'),
+      typingTime: this.get('typingTime')
     };
 
     this.set('draftStatus', I18n.t('composer.saving_draft_tip'));
 
     const composer = this;
 
+    if (this._clearingStatus) {
+      Em.run.cancel(this._clearingStatus);
+      this._clearingStatus = null;
+    }
+
     // try to save the draft
     return Discourse.Draft.save(this.get('draftKey'), this.get('draftSequence'), data)
       .then(function() {
@@ -617,7 +664,20 @@ const Composer = RestModel.extend({
       }).catch(function() {
         composer.set('draftStatus', I18n.t('composer.drafts_offline'));
       });
-  }
+  },
+
+  dataChanged: function(){
+    const draftStatus = this.get('draftStatus');
+    const self = this;
+
+    if (draftStatus && !this._clearingStatus) {
+
+      this._clearingStatus = Em.run.later(this, function(){
+        self.set('draftStatus', null);
+        self._clearingStatus = null;
+      }, 1000);
+    }
+  }.observes('title','reply')
 
 });
 
@@ -657,7 +717,9 @@ Composer.reopenClass({
         metaData: draft.metaData,
         usernames: draft.usernames,
         draft: true,
-        composerState: DRAFT
+        composerState: DRAFT,
+        composerTime: draft.composerTime,
+        typingTime: draft.typingTime
       });
     }
   },

app/assets/javascripts/discourse/views/composer.js.es6

@@ -85,6 +85,8 @@ const ComposerView = Discourse.View.extend(Ember.Evented, {
     const controller = this.get('controller');
     controller.checkReplyLength();
 
+    this.get('controller.model').typing();
+
     const lastKeyUp = new Date();
     this.set('lastKeyUp', lastKeyUp);
 

app/controllers/posts_controller.rb

@@ -403,7 +403,6 @@ class PostsController < ApplicationController
       # Awful hack, but you can't seem to remove the `default_scope` when joining
       # So instead I grab the topics separately
       topic_ids = posts.dup.pluck(:topic_id)
-      secured_category_ids = guardian.secure_category_ids
       topics = Topic.where(id: topic_ids).with_deleted.where.not(archetype: 'private_message')
       topics = topics.secured(guardian)
 
@@ -422,7 +421,9 @@ class PostsController < ApplicationController
       :category,
       :target_usernames,
       :reply_to_post_number,
-      :auto_track
+      :auto_track,
+      :typing_duration_msecs,
+      :composer_open_duration_msecs
     ]
 
     # param munging for WordPress

app/models/draft.rb

@@ -7,7 +7,11 @@ class Draft < ActiveRecord::Base
     d = find_draft(user,key)
     if d
       return if d.sequence > sequence
-      d.update_columns(data: data, sequence: sequence)
+      exec_sql("UPDATE drafts
+               SET  data = :data,
+                    sequence = :sequence,
+                    revisions = revisions + 1
+               WHERE id = :id", id: d.id, sequence: sequence, data: data)
     else
       Draft.create!(user_id: user.id, draft_key: key, data: data, sequence: sequence)
     end

app/models/post.rb

@@ -37,6 +37,7 @@ class Post < ActiveRecord::Base
   has_many :uploads, through: :post_uploads
 
   has_one :post_search_data
+  has_one :post_stat
 
   has_many :post_details
 

app/models/post_stat.rb

@@ -0,0 +1,3 @@
+class PostStat < ActiveRecord::Base
+  belongs_to :post
+end

db/migrate/20150802233112_add_post_stats.rb

@@ -0,0 +1,16 @@
+class AddPostStats < ActiveRecord::Migration
+  def change
+
+    add_column :drafts, :revisions, :int, null: false, default: 1
+
+    create_table :post_stats do |t|
+      t.integer :post_id
+      t.integer :drafts_saved
+      t.integer :typing_duration_msecs
+      t.integer :composer_open_duration_msecs
+      t.timestamps
+    end
+
+    add_index :post_stats, [:post_id]
+  end
+end

lib/post_creator.rb

@@ -113,6 +113,7 @@ class PostCreator
   def create
     if valid?
       transaction do
+        build_post_stats
         create_topic
         save_post
         extract_links
@@ -146,6 +147,14 @@ class PostCreator
     @post
   end
 
+  def self.track_post_stats
+    Rails.env != "test".freeze || @track_post_stats
+  end
+
+  def self.track_post_stats=(val)
+    @track_post_stats = val
+  end
+
   def self.create(user, opts)
     PostCreator.new(user, opts).create
   end
@@ -172,6 +181,23 @@ class PostCreator
 
   protected
 
+  def build_post_stats
+    if PostCreator.track_post_stats
+      draft_key = @topic ? "topic_#{@topic.id}" : "new_topic"
+
+      sequence = DraftSequence.current(@user, draft_key)
+      revisions = Draft.where(sequence: sequence,
+                              user_id: @user.id,
+                              draft_key: draft_key).pluck(:revisions).first || 0
+
+      @post.build_post_stat(
+        drafts_saved: revisions,
+        typing_duration_msecs: @opts[:typing_duration_msecs] || 0,
+        composer_open_duration_msecs: @opts[:composer_open_duration_msecs] || 0
+      )
+    end
+  end
+
   def trigger_after_events(post)
     DiscourseEvent.trigger(:topic_created, post.topic, @opts, @user) unless @opts[:topic_id]
     DiscourseEvent.trigger(:post_created, post, @opts, @user)

spec/components/post_creator_spec.rb

@@ -213,6 +213,21 @@ describe PostCreator do
         }.to_not change { topic.excerpt }
       end
 
+      it 'creates post stats' do
+
+        Draft.set(user, 'new_topic', 0, "test")
+        Draft.set(user, 'new_topic', 0, "test1")
+
+        begin
+          PostCreator.track_post_stats = true
+          post = creator.create
+          expect(post.post_stat.typing_duration_msecs).to eq(0)
+          expect(post.post_stat.drafts_saved).to eq(2)
+        ensure
+          PostCreator.track_post_stats = false
+        end
+      end
+
       describe "topic's auto close" do
 
         it "doesn't update topic's auto close when it's not based on last post" do

spec/models/draft_spec.rb

@@ -109,6 +109,12 @@ describe Draft do
       expect(Draft.get(p.user, p.topic.draft_key, s)).to eq nil
     end
 
-    it 'increases the sequence number when a post is revised'
+    it 'increases revision each time you set' do
+      u = User.first
+      Draft.set(u, 'new_topic', 0, 'hello')
+      Draft.set(u, 'new_topic', 0, 'goodbye')
+
+      expect(Draft.find_draft(u, 'new_topic').revisions).to eq(2)
+    end
   end
 end