download all Facebook photo albums

importFacebook273.rb

require 'rest-graph'
require 'json'
require "open-uri"

# get the access token from https://developers.facebook.com/tools/explorer
ACCESS_TOKEN="CAACEdEose0cBAKlZC1SZAvb3LY4aGkTJgqbE0GAir8cNhT4uVvf9vgw8fCww2BdSUbzWXKMWh65MRzSnyN3EhGSUZCmySqIHqUawt6H9ESchIfcHWk7I751FBXwGF4nfQFsHmuTvtdZBk38hqEfHowGeTyEUcZArLIZA4tdTHINldkWZBKwBP1g2u3tF3b0Q4FcxFNuYyutsgZDZD"

rg = RestGraph.new(:access_token => ACCESS_TOKEN)

albums_next_cursor = nil

albums_downloaded = 0

loop do
    if albums_next_cursor.nil?
        albums_response = rg.get('v2.5/273.ro/albums', :fields => 'name,count,created_time', :limit => 100)
    else
        albums_response = rg.get('v2.5/273.ro/albums', :fields => 'name,count,created_time', :limit => 100, :after => albums_next_cursor)
    end

    albums = albums_response['data']
    albums_paging = albums_response['paging']
    if !albums_paging.nil?
        albums_next_cursor = albums_paging['cursors']['after']
    else
        albums_next_cursor = nil
    end

    puts 'List of albums downloaded'

    # looks like this
    # {
    #  "data": [
    #    {
    #      "count": 2850,
    #      "created_time": "2011-03-05T15:13:17+0000",
    #      "name": "Timeline Photos",
    #      "id": "191928127514673"
    #    }
    #  ]
    # }

    for album in albums
        directory_name = album['name']
        album_number_of_photos=album['count']
        puts 'Making sure the folder ' + directory_name + ' exists'
        Dir.mkdir(directory_name) unless File.exists?(directory_name)

        album_next_cursor = nil

        photos_downloaded = 0
        photos_skipped = 0

        loop do
            puts 'Downloading the photo list for album ' + album['name']
            if album_next_cursor.nil?
                album_photos_response = rg.get('v2.5/' + album['id'] + '/photos', :fields => 'images,name', :limit => 100)
            else
                album_photos_response = rg.get('v2.5/' + album['id'] + '/photos', :fields => 'images,name', :limit => 100, :after => album_next_cursor)
            end

            album_photos = album_photos_response['data']
            album_paging = album_photos_response['paging']
            if !album_paging.nil?
                album_next_cursor = album_paging['cursors']['after']
            else
                album_next_cursor = nil
            end
        # looks like this
        # {
        #   "data": [
        #     {
        #       "images": [
        #         {
        #           "height": 720,
        #           "source": "https://scontent.xx.fbcdn.net/hphotos-xal1/v/t1.0-9/10151217_1059520597422084_3958860623884554303_n.jpg?oh=397223c10f53033a9f9b5212abe33a98&oe=56BB0627",
        #           "width": 960
        #         }
        #       ],
        #       "name": "#colectiv",
        #       "id": "1059520597422084"
        #     }
        #   ]
        # }

            for photo in album_photos
                largest_photo_url = photo['images'][0]['source']
                imagepath = directory_name + '/' + photo['id'] + '.jpg'
                descrpath = directory_name + '/' + photo['id'] + '.txt'

                if File.exists?(imagepath)
                    puts 'Skipping ' + imagepath
                    photos_skipped += 1
                    next
                end

                puts 'Downloading ' + largest_photo_url
                open(largest_photo_url) {|f|
                    puts 'Saving image to ' + imagepath
                    File.open(imagepath, 'wb') do |file|
                        file.puts f.read
                    end
                    puts 'File saved'

                    puts 'Saving description to ' + descrpath
                    File.open(descrpath, 'w') do |file|
                        file.puts photo['name']
                    end
                }
                photos_downloaded += 1

                puts "Skipped #{photos_skipped} Downloaded #{photos_downloaded}/#{album_number_of_photos} photos in album"
            end

            break if album_next_cursor.nil?
        end

        albums_downloaded += 1

        puts "Downloaded #{albums_downloaded}/#{albums.length} albums"
    end

    break if albums_next_cursor.nil?
end