Make upload backend work

Gemfile

@@ -5,7 +5,7 @@ gem 'rails', '3.2.9'
 # Bundle edge Rails instead:
 # gem 'rails', :git => 'git://github.com/rails/rails.git'
 
-gem 'sqlite3'
+gem 'pg'
 
 group :development do
   gem 'pry-rails'

Gemfile.lock

@@ -56,6 +56,7 @@ GEM
     method_source (0.8.1)
     mime-types (1.19)
     multi_json (1.5.0)
+    pg (0.14.1)
     polyglot (0.3.3)
     pry (0.9.10)
       coderay (~> 1.0.5)
@@ -99,7 +100,6 @@ GEM
       multi_json (~> 1.0)
       rack (~> 1.0)
       tilt (~> 1.1, != 1.3.0)
-    sqlite3 (1.3.6)
     thor (0.16.0)
     tilt (1.3.3)
     treetop (1.4.12)
@@ -117,8 +117,8 @@ DEPENDENCIES
   awesome_print
   coffee-rails (~> 3.2.1)
   jquery-rails
+  pg
   pry-rails
   rails (= 3.2.9)
   sass-rails (~> 3.2.3)
-  sqlite3
   uglifier (>= 1.0.3)

app/assets/javascripts/index.js.coffee

@@ -1,5 +1,3 @@
-
-#        cdf(window.faithful);
 (->
   $ ->
     cdf = (data) ->
@@ -72,7 +70,7 @@
 
       viz.selectAll("text.xtitle").data([0]).enter()
         .append("svg:text").attr("class", "xtitle")
-        .text("Email size (kb)")
+        .text(d3.select('#cdf').attr('data-title'))
         .attr
           x: 40 + width / 2
           y: height + 30
@@ -173,18 +171,16 @@
 
     height = 400
     width = 600
-    window.emails = window.emails.filter((x) ->
-      x isnt 0
+    data = []
+    $('textarea#data').val().split("\n").forEach((x) ->
+      return if x.match(/^(#|\s*$)/)
+      n = Number(x)
+      # TODO warn about unparseable lines?
+      data.push(n) unless isNaN(n)
     )
-    window.normal = window.normal.map(Number).filter((x) ->
-      x isnt 0
-    ).sort(d3.ascending)
-    window.faithful = window.faithful.sort(d3.ascending)
-    window.foo = [1, 2]
-    cdf window.emails
-    cdf window.normal
-    cdf window.files
-    cdf window.faithful
-    cdf window.foo
+
+    data.sort(d3.ascending)
+
+    cdf data
 
 ).call this

app/controllers/application_controller.rb

@@ -1,3 +1,11 @@
 class ApplicationController < ActionController::Base
   protect_from_forgery
+
+  private
+  def render(args={})
+    if Hash === args && args[:text]
+      response.headers['Content-Type'] = 'text/plain; charset=utf-8'
+    end
+    super
+  end
 end

app/controllers/plots_controller.rb

@@ -1,5 +1,37 @@
 class PlotsController < ApplicationController
   def index
+  end
+
+  def upload
+    title, upload = params.detect do |k, v|
+      ActionDispatch::Http::UploadedFile === v
+    end
+
+    unless upload
+      return render :status => 401, :error => "Usage: cat data | curl plotocrat.com -F 'X axis title'=@-"
+    end
+
+    plot = Plot.new(:data => upload.read, :title => title).tap(&:save!)
+    render :text => url_for(:action => :view, :slug => plot.slug)
+  rescue ActiveRecord::RecordInvalid => e
+    render :status => 401, :text => url_for(:action => :error, :error => e.message)
+  end
+
+  def view
+    @plot = Plot.where(:slug => params[:slug]).first
+  end
+
+  def error
+    render :text => params[:error]
+  end
+
+  private
 
+  def render(args={})
+    if error = args.delete(:error)
+      super :text => url_for(:action => :error, :error => e.message)
+    else
+      super
+    end
   end
 end

app/controllers/uploads_controller.rb

@@ -0,0 +1,11 @@
+class UploadsController < ActionController::Metal
+
+  def upload
+    plot = Plot.new(:data => request.raw_post, :title => params[:title]).tap(&:save!)
+    puts request.raw_post.inspect
+    render :text => url_for(:action => :view, :slug => plot.slug)
+  rescue ActiveRecord::RecordInvalid => e
+    render :status => 401, :text => url_for(:action => :error, :error => e.message)
+  end
+
+end

app/models/plot.rb

@@ -0,0 +1,14 @@
+class Plot < ActiveRecord::Base
+  attr_accessible :slug, :title, :data
+  validates :data, :presence => true
+  before_save   :ensure_crlf
+  before_create :set_defaults
+
+  def ensure_crlf
+    self.data = self.data.gsub(/\r\n|\r|\n/, "\r\n")
+  end
+
+  def set_defaults
+    self.slug = Digest::SHA1.hexdigest(data)[0...20] if data
+  end
+end

app/views/plots/view.html.erb

@@ -0,0 +1,2 @@
+<div data-title="<%= @plot.title %>" id="cdf"></div>
+<textarea id="data"><%= @plot.data %></textarea>

config/application.rb

@@ -16,11 +16,12 @@ class Application < Rails::Application
     # -- all .rb files in that directory are automatically loaded.
 
     # Custom directories with classes and modules you want to be autoloadable.
-    # config.autoload_paths += %W(#{config.root}/extras)
+    config.autoload_paths += %W(#{config.root}/lib)
 
     # Only load the plugins named here, in the order given (default is alphabetical).
     # :all can be used as a placeholder for all plugins not explicitly named.
     # config.plugins = [ :exception_notification, :ssl_requirement, :all ]
+    #
 
     # Activate observers that should always be running.
     # config.active_record.observers = :cacher, :garbage_collector, :forum_observer

config/database.yml

@@ -4,19 +4,15 @@
 #   Ensure the SQLite 3 gem is defined in your Gemfile
 #   gem 'sqlite3'
 development:
-  adapter: sqlite3
-  database: db/development.sqlite3
-  pool: 5
-  timeout: 5000
+  adapter: postgresql
+  database: plotocrat
 
 # Warning: The database defined as "test" will be erased and
 # re-generated from your development database when you run "rake".
 # Do not set this db to the same as development or production.
 test:
-  adapter: sqlite3
-  database: db/test.sqlite3
-  pool: 5
-  timeout: 5000
+  adapter: postgresql
+  database: plotocrat_test
 
 production:
   adapter: sqlite3

config/routes.rb

@@ -48,7 +48,10 @@
 
   # You can have the root of your site routed with "root"
   # just remember to delete public/index.html.
+  root :to => 'plots#upload', :via => :post
   root :to => 'plots#index'
+  match ':slug' => 'plots#view', :slug => /[0-9a-f]{20}/
+  match '/error' => 'plots#error'
 
   # See how all your routes lay out with "rake routes"
 

db/migrate/20130101213921_create_plots.rb

@@ -0,0 +1,13 @@
+class CreatePlots < ActiveRecord::Migration
+  def change
+    create_table :plots do |t|
+      t.text :slug,  :null => false
+      t.text :data,  :null => false
+      t.text :title, :null => true
+
+      t.timestamps
+    end
+
+    add_index :plots, :slug
+  end
+end

db/schema.rb

@@ -0,0 +1,26 @@
+# encoding: UTF-8
+# This file is auto-generated from the current state of the database. Instead
+# of editing this file, please use the migrations feature of Active Record to
+# incrementally modify your database, and then regenerate this schema definition.
+#
+# Note that this schema.rb definition is the authoritative source for your
+# database schema. If you need to create the application database on another
+# system, you should be using db:schema:load, not running all the migrations
+# from scratch. The latter is a flawed and unsustainable approach (the more migrations
+# you'll amass, the slower it'll run and the greater likelihood for issues).
+#
+# It's strongly recommended to check this file into your version control system.
+
+ActiveRecord::Schema.define(:version => 20130101213921) do
+
+  create_table "plots", :force => true do |t|
+    t.text     "slug",       :null => false
+    t.text     "data",       :null => false
+    t.text     "title"
+    t.datetime "created_at", :null => false
+    t.datetime "updated_at", :null => false
+  end
+
+  add_index "plots", ["slug"], :name => "index_plots_on_slug"
+
+end