photos_controller.rb

#   Copyright (c) 2010, Diaspora Inc.  This file is
#   licensed under the Affero General Public License version 3 or later.  See
#   the COPYRIGHT file.

class PhotosController < ApplicationController
  before_filter :authenticate_user!

  helper_method :object_aspect_ids, :parent, :photo, :additional_photos, :next_photo, :previous_photo, :ownership

  respond_to :html, :json

  
  def index
    @post_type = :photos
    @person = Person.find_by_id(params[:person_id])

    if @person
      @profile = @person.profile
      @contact = current_user.contact_for(@person)
      @is_contact = @person != current_user.person && @contact
      @aspects_with_person = []

      if @contact
        @aspects_with_person = @contact.aspects
        @contacts_of_contact = @contact.contacts
        @contacts_of_contact_count = @contact.contacts.count
      else
        @contact = Contact.new
        @contacts_of_contact = []
        @contacts_of_contact_count = 0
      end

      @posts = current_user.posts_from(@person).where(:type => 'Photo').paginate(:page => params[:page])

      render 'people/show'

    else
      flash[:error] = I18n.t 'people.show.does_not_exist'
      redirect_to people_path
    end
  end

  def create
    begin
      raise unless params[:photo][:aspect_ids]

      if params[:photo][:aspect_ids] == "all"
        params[:photo][:aspect_ids] = current_user.aspects.collect{|x| x.id}
      elsif params[:photo][:aspect_ids].is_a?(Hash)
        params[:photo][:aspect_ids] = params[:photo][:aspect_ids].values
      end

      params[:photo][:user_file] = file_handler(params)

      @photo = current_user.build_post(:photo, params[:photo])

      if @photo.save

        aspects = current_user.aspects_from_ids(params[:photo][:aspect_ids])

        unless @photo.pending
          current_user.add_to_streams(@photo, aspects)
          current_user.dispatch_post(@photo, :to => params[:photo][:aspect_ids])
        end

        if params[:photo][:set_profile_photo]
          profile_params = {:image_url => @photo.url(:thumb_large),
                           :image_url_medium => @photo.url(:thumb_medium),
                           :image_url_small => @photo.url(:thumb_small)}
          current_user.update_profile(profile_params)
        end

        respond_to do |format|
          format.json{ render(:layout => false , :json => {"success" => true, "data" => @photo}.to_json )}
        end
      else
        respond_with @photo, :location => photos_path, :error => message
      end

    rescue TypeError
      message = I18n.t 'photos.create.type_error'
      respond_with @photo, :location => photos_path, :error => message

    rescue CarrierWave::IntegrityError
      message = I18n.t 'photos.create.integrity_error'
      respond_with @photo, :location => photos_path, :error => message

    rescue RuntimeError => e
      message = I18n.t 'photos.create.runtime_error'
      respond_with @photo, :location => photos_path, :error => message
      raise e
    end
  end

  def make_profile_photo
    author_id = current_user.person.id
    @photo = Photo.where(:id => params[:photo_id], :author_id => author_id).first

    if @photo
      profile_hash = {:image_url        => @photo.url(:thumb_large),
                      :image_url_medium => @photo.url(:thumb_medium),
                      :image_url_small  => @photo.url(:thumb_small)}

      if current_user.update_profile(profile_hash)
        respond_to do |format|
          format.js{ render :json => { :photo_id  => @photo.id,
                                       :image_url => @photo.url(:thumb_large),
                                       :image_url_medium => @photo.url(:thumb_medium),
                                       :image_url_small  => @photo.url(:thumb_small),
                                       :author_id => author_id},
                            :status => 201}
        end
      else
        render :nothing => true, :status => 422
      end
    else
      render :nothing => true, :status => 422
    end
  end

  def destroy
    photo = current_user.posts.where(:id => params[:id]).first

    if photo
      current_user.retract(photo)

      respond_to do |format|
        format.json{ render :nothing => true, :status => 204 }
        format.html do
          flash[:notice] = I18n.t 'photos.destroy.notice'
          if photo.status_message_guid
            respond_with photo, :location => photo.status_message
          else
            respond_with photo, :location => person_photos_path(current_user.person)
          end
        end
      end
    else
      respond_with photo, :location => person_photos_path(current_user.person)
    end
  end

  def show
    if photo
      respond_with photo
    else
      begin
        redirect_to :back
      rescue
        redirect_to aspects_path
      end
    end
  end

  def edit
    if @photo = current_user.posts.where(:id => params[:id]).first
      respond_with @photo
    else
      redirect_to person_photos_path(current_user.person)
    end
  end

  def update
    photo = current_user.posts.where(:id => params[:id]).first
    if photo
      if current_user.update_post( photo, params[:photo] )
        flash.now[:notice] = I18n.t 'photos.update.notice'
        respond_to do |format|
          format.js{ render :json => photo, :status => 200 }
        end
      else
        flash.now[:error] = I18n.t 'photos.update.error'
        respond_to do |format|
          format.html{ redirect_to [:edit, photo] }
          format.js{ render :status => 403 }
        end
      end
    else
      redirect_to person_photos_path(current_user.person)
    end
  end

  # helpers
  
  # used on the show page to show which aspects are selected
  def object_aspect_ids
    if  params[:action] == 'show' && parent_aspects = parent.aspects.where(:user_id => current_user.id).all
      @object_aspect_ids ||= parent_aspects.map{|a| a.id}
    else
      super
    end
  end

  def ownership
    @ownership ||= current_user.owns? photo
  end

  def parent
    @parent ||= StatusMessage.where(:guid => photo.status_message_guid).includes(:photos).first if photo.status_message_guid
    @parent ||= photo
  end

  def photo
    @photo ||= current_user.find_visible_post_by_id(params[:id], :type => 'Photo')
    @photo
  end

  def additional_photos
    if photo.status_message_guid?
      @additional_photos ||= photo.status_message.photos
    end
  end

  def next_photo
    @next_photo ||= additional_photos[additional_photos.index(photo)+1]
    @next_photo ||= additional_photos.first
  end

  def previous_photo
    @previous_photo ||= additional_photos[additional_photos.index(photo)-1]
  end

  private

  def file_handler(params)
      ######################## dealing with local files #############
      # get file name
      file_name = params[:qqfile]
      # get file content type
      att_content_type = (request.content_type.to_s == "") ? "application/octet-stream" : request.content_type.to_s
      # create tempora##l file
      begin
        file = Tempfile.new(file_name, {:encoding =>  'BINARY'})
        file.print request.raw_post.force_encoding('BINARY')
      rescue RuntimeError => e
        raise e unless e.message.include?('cannot generate tempfile')
        file = Tempfile.new(file_name) # Ruby 1.8 compatibility
        file.binmode
        file.print request.raw_post
      end
      # put data into this file from raw post request

      # create several required methods for this temporal file
      Tempfile.send(:define_method, "content_type") {return att_content_type}
      Tempfile.send(:define_method, "original_filename") {return file_name}
      file
  end
end