echo-e2e/dist/src/deepgram/transcribe.js

**Testing phone calls is hard. Testing AI-powered phone calls is even harder.**

import { createClient } from "@deepgram/sdk";
import fs from "fs";
const formatTime = (seconds) => {
    return `[${seconds.toFixed(3)}s]`;
};
// Generate transcription string with proper sorting and concatenation
const generateTranscription = (data) => {
    const allWords = [];
    // Collect all words across channels with metadata
    data.results.channels.forEach((channel, index) => {
        const speaker = `Speaker ${index + 1}`;
        const words = channel.alternatives[0].words;
        words.forEach((word) => {
            allWords.push({
                time: word.start,
                text: word.punctuated_word,
                speaker,
            });
        });
    });
    // Sort all words by start time
    allWords.sort((a, b) => (a.time > b.time) ? 1 : -1);
    // Build transcription, grouping by speaker and time
    let transcription = '';
    let currentSpeaker = '';
    let currentTime = '';
    let currentText = '';
    allWords.forEach((word, index) => {
        // If the speaker changes, finalize the current line
        if (word.speaker !== currentSpeaker) {
            if (currentText) {
                transcription += `${currentTime} [${currentSpeaker}] ${currentText.trim()}\n`;
            }
            currentSpeaker = word.speaker;
            currentTime = formatTime(word.time);
            currentText = '';
        }
        // Append the current word
        currentText += `${word.text} `;
        // Finalize the last speaker's line at the end of the loop
        if (index === allWords.length - 1) {
            transcription += `${currentTime} [${currentSpeaker}] ${currentText.trim()}\n`;
        }
    });
    return transcription.trim();
};
export const transcribeFile = async (file) => {
    // STEP 1: Create a Deepgram client using the API key
    const deepgram = createClient(process.env.DEEPGRAM_API_KEY);
    // STEP 2: Call the transcribeFile method with the audio payload and options
    const { result, error } = await deepgram.listen.prerecorded.transcribeFile(fs.readFileSync(file), 
    // STEP 3: Configure Deepgram options for audio analysis
    {
        model: "enhanced",
        // sentiment: true,
        smart_format: true,
        // intents: true,
        // summarize: "v2",
        // topics: true,
        punctuate: true,
        multichannel: true,
    });
    if (error)
        throw error;
    // // STEP 4: Print the results
    // if (!error) console.dir(result, {depth: null});
    return generateTranscription(result);
};
export const printTable = (transcriptionString) => {
    const lines = transcriptionString.split('\n');
    const table = lines.map((line) => {
        const [time, speaker, ...text] = line.split(/ (\[Speaker \d+\]) /).filter(Boolean);
        return {
            time,
            speaker,
            text: text.join(' '),
        };
    });
    console.table(table);
};
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