135 lines
5.2 KiB
Ruby
135 lines
5.2 KiB
Ruby
module JamRuby
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# describes an audio track (like the drums, or guitar) that comprises a JamTrack
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class JamTrackTrack < ActiveRecord::Base
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include JamRuby::S3ManagerMixin
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# there should only be one Master per JamTrack, but there can be N Track per JamTrack
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TRACK_TYPE = %w{Track Master}
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@@log = Logging.logger[JamTrackTrack]
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# Because JamTrackImporter imports audio files now, and because also the mere presence of this causes serious issues when updating the model (because reset of url_44 to something bogus), I've removed these
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#mount_uploader :url_48, JamTrackTrackUploader
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#mount_uploader :url_44, JamTrackTrackUploader
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attr_accessible :jam_track_id, :track_type, :instrument, :instrument_id, :position, :part, as: :admin
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attr_accessible :url_44, :url_48, :md5_44, :md5_48, :length_44, :length_48, :preview_start_time_raw, as: :admin
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attr_accessor :original_audio_s3_path, :skip_uploader
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validates :position, presence: true, numericality: {only_integer: true}, length: {in: 1..1000}
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validates :part, length: {maximum: 25}
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validates :track_type, inclusion: {in: TRACK_TYPE }
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validates :preview_start_time, numericality: {only_integer: true}, length: {in: 1..1000}, :allow_nil => true
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validates_uniqueness_of :part, scope: [:jam_track_id, :instrument_id]
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# validates :jam_track, presence: true
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belongs_to :instrument, class_name: "JamRuby::Instrument"
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belongs_to :jam_track, class_name: "JamRuby::JamTrack"
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has_many :recorded_jam_track_tracks, :class_name => "JamRuby::RecordedJamTrackTrack", :foreign_key => :jam_track_track_id, :dependent => :destroy
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# create storage directory that will house this jam_track, as well as
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def store_dir
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"jam_track_tracks"
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end
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# create name of the file
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def filename(original_name)
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"#{store_dir}/#{jam_track.original_artist}/#{jam_track.name}/#{original_name}"
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end
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# create name of the file
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def preview_filename
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filename("#{File.basename(self["url_44"], ".ogg")}-preview.ogg")
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end
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def has_preview?
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!self["preview_url"].nil?
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end
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# creates a short-lived URL that has access to the object.
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# the idea is that this is used when a user who has the rights to this tries to download this JamTrack
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# we would verify their rights (can_download?), and generates a URL in response to the click so that they can download
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# but the url is short lived enough so that it wouldn't be easily shared
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def preview_sign_url(expiration_time = 120)
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s3_manager.sign_url(self[:preview_url], {:expires => expiration_time, :response_content_type => 'audio/ogg', :secure => false})
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end
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def manually_uploaded_filename(mounted_as)
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if track_type == 'Master'
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filename("Master Mix-#{mounted_as == :url_48 ? '48000' : '44100'}.ogg")
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else
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filename("#{jam_track.name} Stem - #{instrument.description}-#{part}-#{mounted_as == :url_48 ? '48000' : '44100'}.ogg")
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end
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end
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def url_by_sample_rate(sample_rate=48)
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field_name = (sample_rate==48) ? "url_48" : "url_44"
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self[field_name]
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end
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# creates a short-lived URL that has access to the object.
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# the idea is that this is used when a user who has the rights to this tries to download this JamTrack
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# we would verify their rights (can_download?), and generates a URL in response to the click so that they can download
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# but the url is short lived enough so that it wouldn't be easily shared
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def sign_url(expiration_time = 120, sample_rate=48)
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s3_manager.sign_url(url_by_sample_rate(sample_rate), {:expires => expiration_time, :response_content_type => 'audio/ogg', :secure => false})
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end
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def can_download?(user)
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# I think we have to make a special case for 'previews', but maybe that's just up to the controller to not check can_download?
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jam_track.owners.include?(user)
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end
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def move_up
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#normalize_position
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if self.position > 1
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# Switch with previous
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previous_track = self.jam_track.jam_track_tracks.where("position=?", self.position-1).first
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if previous_track
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JamTrack.transaction do
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previous_track.position,self.position = self.position,previous_track.position
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previous_track.save(validate:false)
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self.save(validate:false)
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end
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end
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end
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end
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def move_down
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count=normalize_position
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if self.position < count
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# Switch with next:
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next_track = self.jam_track.jam_track_tracks.where("position=?", self.position+1).first
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if next_track
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next_track.position,self.position = self.position,next_track.position
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next_track.save(validate:false)
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self.save(validate:false)
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end
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end
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end
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private
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def normalize_position
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parent = self.jam_track
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position = 0
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if parent
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JamTrack.transaction do
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parent.jam_track_tracks.each do |jtt|
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position += 1
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if jtt.position != position
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jtt.position = position
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jtt.save(validate:false)
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end
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end
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end
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end
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position
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end # normalize_position
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end # class
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end # module
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