first pass at csv import functionality for tracks

app/controllers/data_controller.rb

@@ -7,6 +7,64 @@ class DataController < ApplicationController
   end
 
   def import
+    
+  end
+
+  def csv_map
+    if params[:file].blank?
+      flash[:notice] = "File can't be blank"
+      redirect_to :back
+    else  
+      @import_to = params[:import_to]
+     
+      #get column headers and formart as [['name', column_number]...]
+      i = -1
+      @headers = import_headers(params[:file].path).collect { |v| [v, i+=1] }
+      @headers.unshift ['',i] 
+      
+      #save file for later
+      directory = "public/uploads/csv"
+      @path = File.join(directory, params[:file].original_filename)
+      File.open(@path, "wb") { |f| f.write(params[:file].read) }
+
+      case @import_to
+      when 'projects'
+        @labels = [:name, :description]
+      when 'todos'
+        @labels = [:description, :context, :project, :notes, :created_at, :due, :completed_at]
+      else
+        flash[:error] = "Ivalid import desitination"
+        redirect_to :back
+      end
+      respond_to do |format|
+        format.html
+      end
+    end
+  end
+
+  def csv_import
+    begin
+      case params[:import_to]
+      when 'projects'
+        count = Project.import params, current_user
+        flash[:notice] = "#{count} Projects imported"
+      when 'todos'
+        count = Todo.import params, current_user
+        flash[:notice] = "#{count} Todos imported"
+      else
+        flash[:error] = "Ivalid import desitination"
+      end
+    rescue Exception => e
+      flash[:error] = "Error importing CSV: #{e}"
+    end
+    File.delete(params[:file])
+    redirect_to import_data_path
+  end
+
+  def import_headers file
+    CSV.foreach(file, headers: false) do |row|
+      return row
+    end
   end
 
   def export

app/models/project.rb

@@ -137,6 +137,22 @@ class Project < ActiveRecord::Base
     @age_in_days ||= (Date.today - created_at.to_date + 1).to_i
   end
 
+  def self.import params, user
+    count = 0
+    CSV.foreach(params[:file], headers: true) do |row|
+      unless find_by_name_and_user_id row[params[:name].to_i], user.id
+        project = new 
+        project.name = row[params[:name].to_i]
+        project.user = user
+        project.description = row[params[:description].to_i] if row[params[:description].to_i].present?
+        project.state = 'active'
+        project.save!
+        count += 1
+      end
+    end
+    count
+  end  
+
 end
 
 class NullProject

app/models/todo.rb

@@ -1,5 +1,8 @@
 class Todo < ActiveRecord::Base
 
+  MAX_DESC_LENGTH = 300
+  MAX_NOTES_LENGTH = 60000
+
   before_save :render_note
   after_save :save_predecessors
 
@@ -106,8 +109,8 @@ class Todo < ActiveRecord::Base
   # Description field can't be empty, and must be < 100 bytes Notes must be <
   # 60,000 bytes (65,000 actually, but I'm being cautious)
   validates_presence_of :description
-  validates_length_of :description, :maximum => 100
-  validates_length_of :notes, :maximum => 60000, :allow_nil => true
+  validates_length_of :description, :maximum => MAX_DESC_LENGTH
+  validates_length_of :notes, :maximum => MAX_NOTES_LENGTH, :allow_nil => true
   validates_presence_of :show_from, :if => :deferred?
   validates_presence_of :context
   validate :check_show_from_in_future
@@ -431,4 +434,27 @@ class Todo < ActiveRecord::Base
     end
   end
 
+  def self.import params, user
+    default_context = Context.where(:user_id=>user.id).order('id').first
+    
+    count = 0
+    CSV.foreach(params[:file], headers: true) do |row|
+      unless find_by_description_and_user_id row[params[:description].to_i], user.id
+        todo = new 
+        todo.user = user
+        todo.description = row[params[:description].to_i].truncate MAX_DESC_LENGTH
+        todo.context = Context.find_by_name_and_user_id(row[params[:context].to_i], user.id) || default_context
+        todo.project = Project.find_by_name_and_user_id(row[params[:project].to_i], user.id) if row[params[:project].to_i].present?
+        todo.state = row[params[:completed_at].to_i].present? ? 'completed' : 'active'
+        todo.notes = row[params[:notes].to_i].truncate MAX_NOTES_LENGTH if row[params[:notes].to_i].present?
+        todo.created_at = row[params[:created_at].to_i] if row[params[:created_at].to_i].present?
+        todo.due = row[params[:due].to_i] 
+        todo.completed_at = row[params[:completed_at].to_i] if row[params[:completed_at].to_i].present?
+        todo.save!
+        count += 1
+      end
+    end
+    count
+  end  
+
 end

app/views/data/csv_map.html.erb

@@ -0,0 +1,11 @@
+<h3>Map fields to be imported<h3>
+<%= form_tag csv_import_data_path do %>
+	<% @labels.each do |l| %>
+		<%= label_tag l %>: 
+		<%= select_tag(l, options_for_select(@headers) ) %>
+		<br>
+	<% end %>
+	<%= hidden_field_tag :file, @path %>
+	<%= hidden_field_tag :import_to, @import_to %>
+	<%= submit_tag "Import" %>	
+<% end %>	

app/views/data/import.html.erb

@@ -0,0 +1,18 @@
+<div id="display_box">
+  <div id="feeds">
+    <div id="feedlegend">
+      <h2>Importing data</h2>
+      <div>
+        <h3>Please upload your CSV file</h3>
+        <%= form_tag csv_map_data_path, :id => 'upload_form', multipart: true do %>
+          <label for="import_to">Import to:</label>
+          <%= select_tag(:import_to, options_for_select([['Projects', 'projects'], ['Todos', 'todos']], 1) ) %>
+          <br><br>
+          <%= file_field_tag :file %>
+          <%= submit_tag "Upload", :id => "upload_form_submit" %>
+        <% end %>  
+      </div>
+    </div>
+  </div>
+  
+</div>

app/views/layouts/application.html.erb

@@ -77,7 +77,8 @@
           <li><a href="#"><%= t('layouts.navigation.admin') %></a>
             <ul>
               <li><%= navigation_link( t('layouts.navigation.preferences'), preferences_path, {:accesskey => "u", :title => t('layouts.navigation.preferences_title')} ) %></li>
-              <li><%= navigation_link( t('layouts.navigation.export'), data_path, {:accesskey => "i", :title => t('layouts.navigation.export_title')} ) %></li>
+              <li><%= navigation_link( t('layouts.navigation.export'), data_path, {:accesskey => "e", :title => t('layouts.navigation.export_title')} ) %></li>
+              <li><%= navigation_link( t('layouts.navigation.import'), import_data_path, {:accesskey => "i", :title => t('layouts.navigation.import_title')} ) %></li>
               <% if current_user.is_admin? -%>
                 <li><%= navigation_link(t('layouts.navigation.manage_users'), users_path, {:accesskey => "a", :title => t('layouts.navigation.manage_users_title')} ) %></li>
               <% end -%>

config/locales/en.yml

@@ -386,7 +386,8 @@ en:
       stats: Statistics
       tickler_title: Tickler
       manage_users: Manage users
-      export_title: Import and export data
+      export_title: Export data
+      import_title: Import data
       preferences: Preferences
       integrations_: Integrate Tracks
       feeds_title: See a list of available feeds
@@ -402,6 +403,7 @@ en:
       completed_tasks_title: Completed
       home: Home
       export: Export
+      import: Import 
       contexts_title: Contexts
       calendar: Calendar
       projects_title: Projects

config/routes.rb

@@ -139,4 +139,12 @@ Tracksapp::Application.routes.draw do
   resources :notes
   resources :preferences
 
+  resources :data do
+    collection do
+      get :import
+      post :csv_map
+      post :csv_import
+    end
+  end
+
 end