115 lines
2.9 KiB
Ruby
115 lines
2.9 KiB
Ruby
module JamRuby
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class Mix < ActiveRecord::Base
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include S3ManagerMixin
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MAX_MIX_TIME = 7200 # 2 hours
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before_destroy :delete_s3_files
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self.primary_key = 'id'
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belongs_to :recording, :class_name => "JamRuby::Recording", :inverse_of => :mixes
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def self.schedule(recording)
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raise if recording.nil?
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mix = Mix.new
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mix.recording = recording
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mix.save
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mix.url = construct_filename(mix.created_at, recording.id, mix.id)
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if mix.save
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mix.enqueue
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end
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mix
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end
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def enqueue
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begin
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Resque.enqueue(AudioMixer, self.id, self.sign_put)
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rescue
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# implies redis is down. we don't update started_at
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false
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end
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# avoid db validations
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Mix.where(:id => self.id).update_all(:started_at => Time.now)
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true
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end
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def can_download?(some_user)
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!ClaimedRecording.find_by_user_id_and_recording_id(some_user.id, recording_id).nil?
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end
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def errored(reason, detail)
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self.error_reason = reason
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self.error_detail = detail
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self.error_count = self.error_count + 1
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save
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end
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def finish(length, md5)
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self.completed_at = Time.now
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self.length = length
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self.md5 = md5
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self.completed = true
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if save
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Notification.send_recording_master_mix_complete(recording)
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end
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end
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# valid for 1 day; because the s3 urls eventually expire
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def manifest
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one_day = 60 * 60 * 24
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manifest = { "files" => [], "timeline" => [] }
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mix_params = []
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recording.recorded_tracks.each do |recorded_track|
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manifest["files"] << { "filename" => recorded_track.sign_url(one_day), "codec" => "vorbis", "offset" => 0 }
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mix_params << { "level" => 100, "balance" => 0 }
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end
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manifest["timeline"] << { "timestamp" => 0, "mix" => mix_params }
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manifest["output"] = { "codec" => "vorbis" }
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manifest["recording_id"] = self.id
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manifest
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end
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def s3_url
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s3_manager.s3_url(url)
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end
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def is_completed
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completed
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end
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def sign_url(expiration_time = 120)
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# expire link in 1 minute--the expectation is that a client is immediately following this link
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s3_manager.sign_url(self.url, {:expires => expiration_time, :response_content_type => 'audio/ogg', :secure => false})
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end
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def sign_put(expiration_time = 3600 * 24)
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s3_manager.sign_url(self.url, {:expires => expiration_time, :content_type => 'audio/ogg', :secure => false}, :put)
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end
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private
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def delete_s3_files
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s3_manager.delete(filename)
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end
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def filename
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# construct a path for s3
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Mix.construct_filename(self.created_at, self.recording.id, self.id)
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end
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def self.construct_filename(created_at, recording_id, id)
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raise "unknown ID" unless id
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"recordings/#{created_at.strftime('%m-%d-%Y')}/#{recording_id}/mix-#{id}.ogg"
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end
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end
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end
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