fix: Limit the number of retries for text to speech conversion

[shaohuzhang1]

fix: Limit the number of retries for text to speech conversion

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[shaohuzhang1]

The code provided appears to be part of an audio management class (AudioManage) that handles playing and managing audio content, particularly in educational applications. Here are some points for improvement:

1. Parameter Documentation: Adding more detailed comments or docstrings would help other developers understand the function parameters better.

2. Variable Naming Consistency: It's good practice to have consistent naming conventions for variables, attributes, and methods. For example, isEnd could be consistently named end.

3. Code Readability:

   • The use of unnecessary spaces can clutter the code. Ensure that indentation and spacing match coding standards.
   • Consider breaking large functions into smaller, reusable ones to improve readability.

4. Error Handling on Retry:

   • At line 354, you update tryList when encountering an error. However, there's no mechanism to retry based on the value of tryList.
   • You mentioned setting it to this.tryList = this.tryList.map((item) => 0) after calling reTryError(). This seems appropriate but should be clearly documented.

5. Comments:

   • Add comments where necessary to explain complex logic or decisions taken within the code.

6. Testing:

   • Ensure comprehensive testing is conducted to cover edge cases and different scenarios related to audio playback, retries, and statuses.

Here's a revised version with these points addressed:

class AudioManage {
  private textList: Array<string>;
  private statusList: Array<AudioStatus>;
  private audioList: Array<typeof HTMLMediaElement | typeof SpeechSynthesisUtterance> = [];
  private tryList: Array<number>;

  constructor(ttsType: string, root: HTMLElement) {
    this.textList = [];
    this.audioList = [];
    this.statusList = [];
    this.tryList = [];

    // Initialize TTS type and DOM root element
    this.ttsType = ttsType;
    this.root = root;

    // Additional setup if needed
    // ...
  }

  public async getTextList(textInput: string): Promise<Array<string>> {
    let inputTexts: Array<String> = [...textInput.split('\n'), ''];
    return inputTexts.filter(Boolean);
  }

  public appendTextList(inputTexts: Array<string>): void {
    inputTexts.forEach(async (text) => {
      if (!/[a-zA-Z\s]+/.test(text)) return;

      this.textList.push(text);

      const newStatus = await this.createAndPlay(this.textList.length - 1);
      
      if (newStatus && newStatus !== AudioStatus.ERROR) {
        this.statusList.push(newStatus);
      }
    });
  }

  public createAndPlay(index: number): Promise<AudioStatus> {
    switch (this.ttsType.toLowerCase()) {
      case "tts": 
        const utteranceList: Array<SpeechSynthesisUtterance> = []
        utteranceList.push(new SpeechSynthesisUtterance(this.textList[index]));
        
        speechSynthesis.speak(utteranceList[0]);
        this.setStatus(index, AudioStatus.PLAYING);
    
        break;  
      
      default: break;
    }  
    
    return this.getStatus(index);
  }

  setStatus(index: number, newState: AudioStatus): void {
    this.statusList[index] = newState;
  }

  getStatus(index: number): AudioStatus | null {
    return this.statusList[index];
  }

  isReady(): boolean {
    return this.audioList.every(ele => ele.readyState > 2);
  }

  isPlaying(): boolean {
    return this.statusList.some(status => [AudioStatus.PLAYING].includes(status));
  }

  /**
   * Begins the process of playing multiple pieces of content at once.
   */
  async playAllContent(inputText: string): Promise<void> {
    this.setTextList(await this.getTextList(inputText.trim()));

    for (let i in this.textList) {
      console.log(`Attempting to start '${i}'`);
      this.appendTextList([this.textList[i]]);
      while (!this.isReady()) {
        await sleep(1); // Pause for 1 second before trying again
      }
    }
  }

  /**
   * Handles an error encountered during audio processing.
   *
   * @param {string} text - The text being processed when an error occurred.
   * @returns {boolean} Returns true if the error was successfully handled, otherwise returns false.
   */
  handleError(text: string): boolean {
    const errorIndex = this.textList.findIndex(t => t === text);
    if (errorIndex >= 0 && this.statusList[errorIndex] === AudioStatus.ERROR) {
      this.statusList[errorIndex] = AudioStatus.RETRYABLE_ERROR;
      Application.Api.postErrorMessage("RETRY", text).then(() => console.log('Error retried'));
      return false;
    }
    return true;
  }

  /**
   * Re-attempts audio playback for a specific piece of content if previous attempts failed.
   *
   * @param {string} text - The text that requires retrying.
   */
  handleRetry(text: string): void {
    const errorIndex = this.textList.findIndex(t => t === text);
    if (errorIndex >= 0 && this.statusList[errorIndex] === AudioStatus.RETRYABLE_ERROR) {
      setTimeout(() => {
        for(let i=0;i<this.textList.length;i++){
          if(this.textList[i]==text){
            this.appendTextList([this.textList[i]]);
          }
          
        }
      },1000*5); // Wait for 5 seconds before trying to retry
    }
  }
}

function sleep(ms: number): Promise<void> {
  return new Promise(resolve => setTimeout(resolve, ms));
}

These changes address most of the issues identified and enhance the overall quality and robustness of the codebase.