# app/controllers/comment_controller.rb:
# Show annotations upon a request or other object.
#
# Copyright (c) 2008 UK Citizens Online Democracy. All rights reserved.
# Email: hello@mysociety.org; WWW: http://www.mysociety.org/

class CommentController < ApplicationController
    before_filter :check_read_only, :only => [ :new ]
    before_filter :find_info_request, :only => [ :new ]
    before_filter :create_track_thing, :only => [ :new ]
    before_filter :reject_unless_comments_allowed, :only => [ :new ]
    before_filter :reject_if_user_banned, :only => [ :new ]

    def new
        if params[:comment]
            @comment = Comment.new(params[:comment].merge({
                :comment_type => 'request',
                :user => @user
            }))
        end

        if params[:comment]
            # TODO: this check should theoretically be a validation rule in the model
            @existing_comment = Comment.find_existing(@info_request.id, params[:comment][:body])
        else
            # Default to subscribing to request when first viewing form
            params[:subscribe_to_request] = true
        end

        # See if values were valid or not
        if !params[:comment] || !@existing_comment.nil? || !@comment.valid? || params[:reedit]
            render :action => 'new'
            return
        end

        # Show preview page, if it is a preview
        if params[:preview].to_i == 1
            render :action => 'preview'
            return
        end

        if authenticated?(
                :web => _("To post your annotation"),
                :email => _("Then your annotation to {{info_request_title}} will be posted.",:info_request_title=>@info_request.title),
                :email_subject => _("Confirm your annotation to {{info_request_title}}",:info_request_title=>@info_request.title)
            )

            # Also subscribe to track for this request, so they get updates
            # (do this first, so definitely don't send alert)
            flash[:notice] = _("Thank you for making an annotation!")

            if params[:subscribe_to_request]
                @track_thing = TrackThing.create_track_for_request(@info_request)
                @existing_track = TrackThing.find_existing(@user, @track_thing)
                if @user && @info_request.user == @user
                    # don't subscribe to own request!
                elsif !@existing_track
                    @track_thing.track_medium = 'email_daily'
                    @track_thing.tracking_user_id = @user.id
                    @track_thing.save!
                    flash[:notice] += _(" You will also be emailed updates about the request.")
                else
                    flash[:notice] += _(" You are already being emailed updates about the request.")
                end
            end

            # This automatically saves dependent objects in the same transaction
            @comment = @info_request.add_comment(params[:comment][:body], authenticated_user)
            @info_request.save!

            # we don't use comment_url here, as then you don't see the flash at top of page
            redirect_to request_url(@info_request)
        else
            # do nothing - as "authenticated?" has done the redirect to signin page for us
        end
    end

    private

    def find_info_request
        if params[:type] == 'request'
            @info_request = InfoRequest.find_by_url_title!(params[:url_title])
        else
            raise "Unknown type #{ params[:type] }"
        end
    end

    def create_track_thing
        @track_thing = TrackThing.create_track_for_request(@info_request)
    end

    # Are comments disabled on this request?
    #
    # There is no “add comment” link when comments are disabled, so users should
    # not usually hit this unless they are explicitly attempting to avoid the comment block
    def reject_unless_comments_allowed
        unless @info_request.comments_allowed?
            redirect_to request_url(@info_request), :notice => "Comments are not allowed on this request"
        end
    end

    # Banned from adding comments?
    def reject_if_user_banned
        if authenticated_user && !authenticated_user.can_make_comments?
            @details = authenticated_user.can_fail_html
            render :template => 'user/banned'
        end
    end

end