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by Dylan
04:17
created

Tone.beepOnBeepOff   A

↳ Parent: Tone

Complexity

Conditions 2

Size

Total Lines 12
Code Lines 8

Duplication

Lines 0
Ratio 0 %

Code Coverage

Tests 0
CRAP Score 6

Importance

Changes 0
Metric Value
eloc 8
dl 0
loc 12
c 0
b 0
f 0
ccs 0
cts 0
cp 0
rs 10
cc 2
crap 6
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// import {DEFAULT_LENGTH, DEFAULT_FREQUENCY} from './config'
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/**

            


            
                                                                                                            
                            
            
                                    
            
            

                
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 * @class Tone player

            


            
                                                                                                            
                            
            
                                    
            
            

                
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 * @name Tone

            


            
                                                                                                            
                            
            
                                    
            
            

                
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 */

            


            
                                                                                                            
                            
            
                                    
            
            

                
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export class Tone {

            


            
                                                                                                            
                            
            
                                    
            
            

                
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  ctx: AudioContext

            


            
                                                                                                            
                            
            
                                    
            
            

                
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  gainNode: GainNode

            


            
                                                                                                            
                            
            
                                    
            
            

                
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  outNode: AudioDestinationNode

            


            
                                                                                                            
                            
            
                                    
            
            

                
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  /**

            


            
                                                                                                            
                            
            
                                    
            
            

                
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   * Initialize a tone beeper.

            


            
                                                                                                            
                            
            
                                    
            
            

                
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   */

            


            
                                                                                                            
                            
            
                                    
            
            

                
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  /* istanbul ignore next */

            


            
                                                                                                            
                            
            
                                    
            
            

                
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  constructor() {

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    if (typeof window !== 'undefined' && typeof window.AudioContext !== 'undefined') {

            


            
                                                                                                            
                            
            
                                    
            
            

                
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      this.ctx = new window.AudioContext()

            


            
                                                                                                            
                            
            
                                    
            
            

                
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      this.gainNode = this.ctx.createGain()

            


            
                                                                                                            
                            
            
                                    
            
            

                
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      this.gainNode.gain.value = 1/8

            


            
                                                                                                            
                            
            
                                    
            
            

                
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      this.outNode = this.ctx.destination

            


            
                                                                                                            
                            
            
                                    
            
            

                
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      this.gainNode.connect(this.outNode)

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    }

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    else {

            


            
                                                                                                            
                            
            
                                    
            
            

                
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      throw 'AudioContext is required'

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    }

            


            
                                                                                                            
                                                                
            
                                    
            
            

                
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  }

            


            
                                                                        
                            
            
                                    
            
            

                
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  /**

            


            
                                                                        
                            
            
                                    
            
            

                
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   * Play a beep after wait seconds, stopping after length seconds.

            


            
                                                                        
                            
            
                                    
            
            

                
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   */

            


            
                                                                        
                            
            
                                    
            
            

                
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  /* istanbul ignore next */

            


            
                                                                        
                            
            
                                    
            
            

                
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  beepOnBeepOff(frequency: number, length: number, wait: number): void {

            


            
                                                                        
                            
            
                                    
            
            

                
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    const osc = this.ctx.createOscillator()

            


            
                                                                        
                            
            
                                    
            
            

                
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    osc.type = 'square'

            


            
                                                                        
                            
            
                                    
            
            

                
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    osc.frequency.value = frequency

            


            
                                                                        
                            
            
                                    
            
            

                
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    osc.connect(this.gainNode)

            


            
                                                                        
                            
            
                                    
            
            

                
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    osc.start(wait)

            


            
                                                                        
                            
            
                                    
            
            

                
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    osc.stop(wait + length)

            


            
                                                                                                            
                            
            
                                    
            
            

                
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  }

            


            
                                                                                                            
                            
            
                                    
            
            

                
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}

            


            
                                                                                                            
                            
            
                                    
            
            

                
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export default Tone

            


            
                                                        
            
                                    
            
            

                
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