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November 29, 2022 22:39
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| # From https://gist.github.com/Schwad/44f01093e4fe7d8a083a0bc2ac246918 | |
| # | |
| # Given Data: | |
| # https://gist.githubusercontent.com/Schwad/9938bc64a88727a3ab2eaaf9ee63c99a/raw/6519e28c85820caac2684cfbec5fe4af33f179a4/rows_of_sweet_jams.csv | |
| # | |
| # Output: | |
| # - Has the blog URLs as key values | |
| # - Each blog URL key points to nested arrays. | |
| # - The arrays each have a list of filenames and kilobyte values of songs found on that website. | |
| # - An array's total megabytes cannot exceed 120. (This is the limit when burning an 80 minute audio CD!) | |
| require "csv" | |
| require "debug" | |
| require "pp" | |
| class MightIRecommend | |
| attr_reader :list | |
| def initialize(csv) | |
| @list = CSV.parse(csv, headers: true) | |
| end | |
| def to_s | |
| to_songs.group_by { |song| song.url }.map do |url, songs| | |
| [ | |
| url, | |
| Albumator.new(songs, album_type: MixTape).to_albums | |
| ] | |
| end.to_h | |
| end | |
| private | |
| def to_songs | |
| list.map do |row| | |
| Song.new( | |
| url: row["url"], | |
| email: row["email"], | |
| filename: row["filename"], | |
| size: row["size in kilobytes"] | |
| ) | |
| end | |
| end | |
| end | |
| class Albumator | |
| attr_reader :album_type, :songs | |
| def initialize(songs = [], album_type:) | |
| @songs = songs | |
| @album_type = album_type | |
| end | |
| def to_albums | |
| [].tap do |albums| | |
| albums << album_type.new | |
| songs.each do |song| | |
| added = albums.last << song | |
| unless added | |
| albums << album_type.new | |
| albums.last << song | |
| end | |
| end | |
| end | |
| end | |
| end | |
| class MixTape | |
| MAX_BYTES = 120_000_000 | |
| attr_reader :album | |
| def initialize | |
| @album = [] | |
| end | |
| # | |
| # Adds the song to the album (if space is available). Returns false if unable to add to the album. | |
| # | |
| def <<(song) | |
| return false if song.size >= remaining_space | |
| @album << song | |
| end | |
| def inspect | |
| album.inspect | |
| end | |
| def size | |
| album.map { |song| song.size }.sum | |
| end | |
| private | |
| def remaining_space | |
| MAX_BYTES - size | |
| end | |
| end | |
| #<CSV::Row "url":"http://murazik.io/mandi.konopelski" "email":"ray@nikolaus-pagac.net" "filename":"twilight_laser/laborum.mp3" "size in kilobytes":"8107"> | |
| class Song | |
| attr_reader :email, :filename, :size, :url | |
| def initialize(url:, email:, filename:, size:) | |
| @url = url | |
| @email = email | |
| @filename = filename | |
| @size = size.to_i * 1000 # convert KB to Bytes | |
| end | |
| def inspect | |
| [filename, size] | |
| end | |
| end | |
| URL = %{https://gist.githubusercontent.com/Schwad/9938bc64a88727a3ab2eaaf9ee63c99a/raw/6519e28c85820caac2684cfbec5fe4af33f179a4/rows_of_sweet_jams.csv} | |
| pp MightIRecommend.new(`curl --silent #{URL}`).to_s |
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