bump dependencies

.github/workflows/test.yml

@@ -0,0 +1,44 @@
+name: Unit tests
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+  
+jobs:
+
+  npm_test:
+    name: Unit tests
+    runs-on: ubuntu-latest
+    timeout-minutes: 20
+    strategy:
+      fail-fast: true
+      matrix:
+        nodever:
+          [
+            'latest',
+            'lts/*',
+            'lts/hydrogen'
+          ]
+    permissions:
+      contents: read
+
+    steps:
+    - name: Checkout repository
+      uses: https://github.com/actions/checkout@v4
+    
+    - name: Setup nodejs
+      uses: https://github.com/actions/setup-node@v4
+      with:
+        node-version: "${{ matrix.nodever }}"
+        check-latest: true
+
+    - name: Install dependencies
+      run: npm ci
+
+    - name: Build
+      run: npm run build
+    
+    - name: Run tests
+      run: npm test

.gitignore

@@ -102,3 +102,6 @@ public
 config/config.json5
 distribution/
 .env
+test/*.js*
+output.wav
+output.mp3

.tangled/workflows/audit.yml

@@ -0,0 +1,18 @@
+when:
+  - event: ["push"]
+    branch: ["master"]
+
+engine: "nixery"
+
+dependencies:
+  nixpkgs:
+    - nodejs
+
+steps:
+  - name: "NPM Audit"
+    command: "npm audit"
+
+clone:
+  skip: false
+  depth: 3
+  submodules: false

.tangled/workflows/test.yml

@@ -0,0 +1,24 @@
+when:
+  - event: ["push"]
+    branch: ["master"]
+
+engine: "nixery"
+
+dependencies:
+  nixpkgs:
+    - nodejs
+
+steps:
+  - name: "Install dependencies"
+    command: "npm ci"
+  
+  - name: "tsc"
+    command: "npm run build && echo 'done.'"
+
+  - name: "tests"
+    command: "npm test"
+
+clone:
+  skip: false
+  depth: 3
+  submodules: false

.vscode/launch.json

@@ -0,0 +1,22 @@
+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+    
+        {
+            "type": "node",
+            "request": "launch",
+            "name": "Launch Program",
+            "skipFiles": [
+                "<node_internals>/**"
+            ],
+            "program": "${workspaceFolder}/src/index.ts",
+            "preLaunchTask": "tsc: build - tsconfig.json",
+            "outFiles": [
+                "${workspaceFolder}/distribution/**/*.js"
+            ]
+        }
+    ]
+}

config/config.example.json5

@@ -49,17 +49,17 @@
         "hilo 1": {
             "tracks": [
                 "audio/hi_01.flac",
-                "%cory hi",
+                "%cory weather.temp.max",
                 "audio/lo_01.flac",
-                "%cory lo"
+                "%cory weather.temp.min"
             ]
         },
         "hilo 2": {
             "tracks": [
                 "audio/hi_02.flac",
-                "%cory hi",
+                "%cory weather.temp.max",
                 "audio/lo_02.flac",
-                "%cory lo"
+                "%cory weather.temp.min"
             ]
         },
         "rain 1": {
@@ -114,5 +114,11 @@
             "directory": "audio/voice/cory/",
             "extension": "flac"
         }
+    },
+    "weather": {
+        // Provide an OpenWeatherMap API key
+        // https://openweathermap.org/price
+        "key": "not0a0real0key00281f631aef6ad3a1",
+        "city": "chicago"
     }
 }

package.json

@@ -1,6 +1,6 @@
 {
   "name": "morning-report",
-  "version": "0.0.1",
+  "version": "0.0.3",
   "description": "Procedurally generates a radio weather report",
   "keywords": [
     "weather",
@@ -19,16 +19,25 @@
   },
   "type": "module",
   "main": "distribution/index.js",
+  "bin": {
+    "morning-report": "./distribution/src/index.js"
+  },
+  "files": [
+    "distribution"
+  ],
   "scripts": {
-    "build": "npx tsc",
-    "start": "node distribution/index.js"
+    "build": "tsc",
+    "start": "node distribution/src/index.js",
+    "test": "vitest"
   },
   "dependencies": {
     "json5": "2.2.3",
-    "openweathermap-ts": "1.2.10"
+    "openweather-api-node": "3.1.5"
   },
   "devDependencies": {
-    "typescript": "5.9.2",
-    "@types/node": "24.3.0"
+    "typescript": "5.9.3",
+    "@types/node": "24.7.2",
+    "vitest": "3.2.4",
+    "@vitest/coverage-v8": "3.2.4"
   }
 }

src/index.ts

@@ -1,23 +1,27 @@
+#!/usr/bin/env node
 import path from 'path';
 import fsp from 'fs/promises';
 import json5 from 'json5';
 import Sequencer from './sequencer.js';
+import { Stitcher } from './stitcher.js';
 import type {Programs, Segments, Sequences} from './sequencer.js';
 import type { Voices } from './voice.js';
+import type { Options } from 'openweather-api-node';
 
 
 interface Config {
     programs: Programs,
     segments: Segments,
     sequences: Sequences,
-    voices: Voices
+    voices: Voices,
+    weather: Options
 }
 
 console.log('morning-report\nCory Sanin 2025\n');
 
 const config: Config = json5.parse(await fsp.readFile(process.env['CONFIG'] || path.join('config', 'config.json5'), { encoding: 'utf-8' }));
-const sequence = Sequencer(config);
+const sequence = await Sequencer(config);
 console.log(sequence.join('\n'));
-
+await Stitcher(sequence);
 
 export type { Config };

src/sequencer.ts

@@ -1,11 +1,15 @@
+import { OpenWeatherAPI, type DailyWeather } from 'openweather-api-node';
+import { voiceLines } from './voice.js';
 import type { Config } from './index.js';
+import type { Voice } from './voice.js';
+import crypto from 'crypto';
 
 type SegmentName = string;
 type SequenceName = string;
 type Programs = SegmentName[][];
 type Segments = { [segment: SegmentName]: SequenceName[] };
 type Sequence = {
-    condition?: string;
+    conditions?: string[];
     tracks: string[];
 }
 type Sequences = { [sequence: SequenceName]: Sequence };
@@ -13,39 +17,93 @@ type Sequences = { [sequence: SequenceName]: Sequence };
 let config: Config = null;
 
 function selectOne<T>(arr: T[]): T {
-    return arr[Math.floor(Math.random() * arr.length)];
+    return arr[crypto.randomInt(0, arr.length)];
 }
 
-function conditionIsMet(condition: string | undefined = undefined): boolean {
+function resolveSide(side: string, currentWeather: DailyWeather) {
+    if (!side.startsWith('weather')) {
+        return side.includes('.') ? parseFloat(side) : parseInt(side);
+    }
+
+    const tokens = side.split('.');
+    let w = currentWeather;
+    tokens.forEach(t => w = w[t]);
+    return typeof w === 'object' ? JSON.stringify(w) : w as (string | number);
+}
+
+function notNotANumber(something: number | string, defaultVal: string) {
+    if (typeof something === 'string' || !isNaN(something)) {
+        return something;
+    }
+    return defaultVal;
+}
+
+function conditionIsMet(condition: string | undefined, currentWeather: DailyWeather): boolean {
     if (typeof condition !== 'string') {
         return true;
     }
-    // TODO: parse condition, return bool
-    return false;
+    const [lhs, relational, rhs] = condition.split(' ');
+    if (lhs === undefined || relational === undefined || rhs === undefined) {
+        throw new Error(`Condition "${condition}" is not in the correct format`);
+    }
+    const lhsResolved = notNotANumber(resolveSide(lhs, currentWeather), lhs);
+    const rhsResolved = notNotANumber(resolveSide(rhs, currentWeather), rhs);
+    switch (relational) {
+        case '=':
+        case '==':
+            return lhsResolved == rhsResolved;
+        case '!=':
+            return lhsResolved != rhsResolved;
+        case '<':
+            return lhsResolved < rhsResolved;
+        case '<=':
+            return lhsResolved <= rhsResolved;
+        case '>':
+            return lhsResolved > rhsResolved;
+        case '>=':
+            return lhsResolved >= rhsResolved;
+        default:
+            throw new Error(`Unsupported relational operator: ${relational}`);
+    }
 }
 
-function processSequence(sequence: Sequence): string[] {
+function resolveMacro(str: string, currentWeather: DailyWeather): string[] {
+    if (str.startsWith('%')) {
+        const [profile, subject] = str.substring(1).split(' ', 2);
+        const voiceProfile: Voice = config.voices[profile];
+        let resolvedSubject: any = currentWeather;
+        subject.split('.').forEach(t => resolvedSubject = resolvedSubject[t]);
+        return voiceLines(voiceProfile, resolvedSubject);
+    }
+    return [str];
+}
+
+function processSequence(sequence: Sequence, currentWeather: DailyWeather): string[] {
     const tracks = sequence.tracks;
-    // TODO: process voice macros
-    return tracks;
+    return tracks.map(t => resolveMacro(t, currentWeather)).flat().filter(t => t !== null);
 }
 
-function processSegment(segment: SegmentName): string[] {
+function processSegment(segment: SegmentName, currentWeather: DailyWeather): string[] {
     if (!(segment in config.segments)) {
-        return processSequence(config.sequences[segment]);
+        return (config.sequences[segment].conditions || []).every(c => conditionIsMet(c, currentWeather)) ? processSequence(config.sequences[segment], currentWeather) : [];
     }
-    const potentialSequences: SequenceName[] = config.segments[segment].filter(s => conditionIsMet(config.sequences[s].condition));
+    const potentialSequences: SequenceName[] = config.segments[segment].filter(s => (config.sequences[s].conditions || []).every(c => conditionIsMet(c, currentWeather)));
     if (potentialSequences.length === 0) {
         return [];
     }
-    return processSequence(config.sequences[selectOne(potentialSequences)]);
+    return processSequence(config.sequences[selectOne(potentialSequences)], currentWeather);
 }
 
-function Sequencer(conf: Config): string[] {
+async function Sequencer(conf: Config): Promise<string[]> {
     config = conf;
+    const weather = new OpenWeatherAPI(conf.weather);
+    const currentWeather = await weather.getToday();
     const sequence: string[] = [];
     const program: SegmentName[] = selectOne(conf.programs);
-    program.forEach(segment => sequence.push(...processSegment(segment)));
+    for (let i = 0; i < program.length; i++) {
+        const segment = program[i];
+        sequence.push(...(processSegment(segment, currentWeather)));
+    }
     return sequence;
 }
 

src/stitcher.ts

@@ -0,0 +1,34 @@
+import { spawn } from 'child_process';
+
+const ENCTOOL = process.env['ENCTOOL'] || 'ffmpeg';
+
+function ffmpeg(args: string[], files: number): Promise<void> {
+    return new Promise((resolve, reject) => {
+        console.log(`${ENCTOOL} ${args.join(' ')}`);
+        const process = spawn(ENCTOOL, args);
+        const to = setTimeout(async () => {
+            process.kill();
+            reject(new Error('timed out'));
+        }, 5000 * files);
+        process.on('exit', async (code) => {
+            clearTimeout(to);
+            if (code !== 0) {
+                reject(new Error(`exited with ${code}`));
+            }
+            else {
+                resolve();
+            }
+        });
+    });
+}
+
+async function Stitcher(files: string[]) {
+    const args: string[] = [];
+    files.forEach(f => args.push('-i', f));
+    args.push('-filter_complex', `[0:a][1:a][2:a]concat=n=${files.length}:v=0:a=1[out]`);
+    args.push('-map', '[out]', '-ar', '44100', '-ac', '2', '-c:a', 'pcm_s16le', 'output.wav', '-y');
+    await ffmpeg(args, files.length);
+}
+
+export default Stitcher;
+export { Stitcher };

src/voice.ts

@@ -1,4 +1,4 @@
-
+import path from 'path';
 
 interface Voice {
     directory: string;
@@ -7,4 +7,164 @@ interface Voice {
 
 type Voices = { [name: string]: Voice };
 
+const LINES = {
+    NEGATIVE: 'negative',
+    POINT: 'point',
+    ZERO: 'zero',
+    ONE: 'one',
+    TWO: 'two',
+    THREE: 'three',
+    FOUR: 'four',
+    FIVE: 'five',
+    SIX: 'six',
+    SEVEN: 'seven',
+    EIGHT: 'eight',
+    NINE: 'nine',
+    TEN: 'ten',
+    ELEVEN: 'eleven',
+    TWELVE: 'twelve',
+    THIRTEEN: 'thirteen',
+    FIFTEEN: 'fifteen',
+    TEEN: 'teen',
+    TWENTY: 'twenty',
+    THIRTY: 'thirty',
+    FORTY: 'forty',
+    FIFTY: 'fifty',
+    SIXTY: 'sixty',
+    SEVENTY: 'seventy',
+    EIGHTY: 'eighty',
+    NINETY: 'ninety',
+    HUNDRED: 'hundred',
+    THOUSAND: 'thousand',
+    MILLION: 'million',
+    BILLION: 'billion',
+    TRILLION: 'trillion'
+}
+
+function formatNumber(num: number): string {
+    const parts = num.toString().split(".");
+    parts[0] = parts[0].replace(/\B(?=(\d{3})+(?!\d))/g, ",");
+    return parts.join(".");
+}
+
+function digitByDigit(str: string): string[] {
+    const tokens: string[] = [];
+    const input = str.replaceAll(',', '');
+    const map = [
+        LINES.ZERO,
+        LINES.ONE,
+        LINES.TWO,
+        LINES.THREE,
+        LINES.FOUR,
+        LINES.FIVE,
+        LINES.SIX,
+        LINES.SEVEN,
+        LINES.EIGHT,
+        LINES.NINE
+    ]
+    for (let i = 0; i < input.length; i++) {
+        tokens.push(map[parseInt(input.charAt(i))]);
+    }
+    return tokens;
+}
+
+function tens(str: string): string[] {
+    if (str === '0') {
+        return [LINES.ZERO];
+    }
+    const tokens: string[] = [];
+    const num = parseInt(str);
+    const map = {
+        '2': LINES.TWENTY,
+        '3': LINES.THIRTY,
+        '4': LINES.FORTY,
+        '5': LINES.FIFTY,
+        '6': LINES.SIXTY,
+        '7': LINES.SEVENTY,
+        '8': LINES.EIGHTY,
+        '9': LINES.NINETY
+    };
+    const ones = str.charAt(str.length - 1);
+    if (num === 0) {
+        return [];
+    }
+    else if (num >= 20) {
+        tokens.push(map[str.charAt(0)]);
+        if (ones !== '0') {
+            tokens.push(...digitByDigit(ones));
+        }
+    }
+    else if (num < 10) {
+        tokens.push(...digitByDigit(ones));
+    }
+    else {
+        const weirdoNumberMap = [
+            [LINES.TEN],
+            [LINES.ELEVEN],
+            [LINES.TWELVE],
+            [LINES.THIRTEEN],
+            [LINES.FOUR, LINES.TEEN],
+            [LINES.FIFTEEN],
+            [LINES.SIX, LINES.TEEN],
+            [LINES.SEVEN, LINES.TEEN],
+            [LINES.EIGHT, LINES.TEEN],
+            [LINES.NINE, LINES.TEEN],
+        ]
+        tokens.push(...weirdoNumberMap[num - 10]);
+    }
+    return tokens;
+}
+
+function hundreds(str: string): string[] {
+    const tokens: string[] = [];
+    if (str.length === 3 && str.charAt(0) !== '0') {
+        tokens.push(...digitByDigit(str.charAt(0)));
+        tokens.push(LINES.HUNDRED);
+        str = str.substring(1);
+    }
+    tokens.push(...tens(str));
+    return tokens;
+}
+
+function integer(str: string): string[] {
+    const tokens: string[] = [];
+    const numGroups = str.split(',');
+    const seperators = [LINES.TRILLION, LINES.BILLION, LINES.MILLION, LINES.THOUSAND];
+    seperators.splice(0, seperators.length - numGroups.length + 1);
+    numGroups.forEach(g => {
+        if (g !== '000') {
+            tokens.push(...hundreds(g));
+        }
+        if (seperators.length === 0) {
+            return;
+        }
+        const sep = seperators.shift();
+        if (g !== '000') {
+            tokens.push(sep);
+        }
+    });
+    return tokens;
+}
+
+function voiceLines(voice: Voice, num: number): string[] {
+    if (Math.abs(num) > 999999999999999 || isNaN(num)) {
+        return [];
+    }
+    const tokens: string[] = [];
+    const str = formatNumber(num);
+    const parts = str.split('.');
+    if (parts[0].startsWith('-')) {
+        tokens.push(LINES.NEGATIVE);
+        parts[0] = parts[0].substring(1);
+    }
+    tokens.push(...integer(parts[0]));
+    if (parts.length > 1) {
+        tokens.push(LINES.POINT);
+        tokens.push(...digitByDigit(parts[1]));
+    }
+    return tokens.map(l => path.join(voice.directory, `${l}${voice.extension.length > 0 && voice.extension.charAt(0) !== '.' ? '.' : ''}${voice.extension}`));
+}
+
+export default voiceLines;
+export { voiceLines, LINES };
 export type { Voice, Voices };

test/sequencer.test.ts

@@ -0,0 +1,189 @@
+import { describe, expect, it, vi } from 'vitest';
+import { type Options } from 'openweather-api-node';
+import { Sequencer } from '../src/sequencer.js';
+
+const dummyWeather: Options = { key: 'dummy' };
+
+vi.mock('openweather-api-node', () => {
+    return {
+        OpenWeatherAPI: vi.fn().mockImplementation((_) => {
+            return {
+                getToday: vi.fn(() => {
+                    return {
+                        "lat": 43.0748,
+                        "lon": -89.3838,
+                        "dt": "2025-08-29T06:31:05.000Z",
+                        "dtRaw": 1756449065,
+                        "timezoneOffset": -18000,
+                        "astronomical": {
+                            "sunrise": "2025-08-29T11:19:05.000Z",
+                            "sunriseRaw": 1756466345,
+                            "sunset": "2025-08-30T00:38:08.000Z",
+                            "sunsetRaw": 1756514288
+                        },
+                        "weather": {
+                            "temp": {
+                                "cur": 55.85,
+                                "min": 52.99,
+                                "max": 58.01
+                            },
+                            "feelsLike": {
+                                "cur": 55.31
+                            },
+                            "pressure": 1022,
+                            "humidity": 89,
+                            "clouds": 0,
+                            "visibility": 10000,
+                            "wind": {
+                                "deg": 140,
+                                "speed": 5.75
+                            },
+                            "rain": 0,
+                            "snow": 0,
+                            "conditionId": 800,
+                            "main": "Clear",
+                            "description": "clear sky",
+                            "icon": {
+                                "url": "http://openweathermap.org/img/wn/01n@2x.png",
+                                "raw": "01n"
+                            }
+                        }
+                    }
+                })
+            }
+        })
+    }
+});
+
+describe('sequencer', () => {
+    it('can generate a list from a static config', async () => {
+        expect(await Sequencer({
+            programs: [['sequence 1', 'segment 1', 'segment 2']],
+            segments: {
+                'segment 1': ['sequence 1'],
+                'segment 2': ['sequence 2']
+            },
+            sequences: {
+                'sequence 1': {
+                    'tracks': [
+                        'seq1.flac'
+                    ]
+                },
+                'sequence 2': {
+                    'tracks': [
+                        'seq2.flac'
+                    ]
+                }
+            },
+            voices: {},
+            weather: dummyWeather
+        })).to.include.ordered.members(['seq1.flac', 'seq1.flac', 'seq2.flac']);
+    });
+
+    it('can include tracks conditionally', async () => {
+        expect(await Sequencer({
+            programs: [['segment 1', 'sequence 1', 'segment 2', 'sequence 2']],
+            segments: {
+                'segment 1': ['sequence 1'],
+                'segment 2': ['sequence 2']
+            },
+            sequences: {
+                'sequence 1': {
+                    'conditions': ['1 = 1', '1.1 > 1', '2 >= 1', '1 < 2', '1 <= 1', '-1 != 0', undefined],
+                    'tracks': [
+                        'seq1.flac'
+                    ]
+                },
+                'sequence 2': {
+                    'conditions': ['weather.lat = -500'],
+                    'tracks': [
+                        'seq2.flac'
+                    ]
+                }
+            },
+            voices: {},
+            weather: dummyWeather
+        })).to.be.ordered.members(['seq1.flac', 'seq1.flac']);
+    });
+
+    it('throws an error on invalid conditions', async () => {
+        await expect(Sequencer({
+            programs: [['sequence 1']],
+            segments: {
+            },
+            sequences: {
+                'sequence 1': {
+                    'conditions': ['100'],
+                    'tracks': [
+                        'seq1.flac'
+                    ]
+                }
+            },
+            voices: {},
+            weather: dummyWeather
+        })).rejects.toThrow(/not in the correct format/);
+
+        await expect(Sequencer({
+            programs: [['sequence 1']],
+            segments: {
+            },
+            sequences: {
+                'sequence 1': {
+                    'conditions': ['1 ~ 2'],
+                    'tracks': [
+                        'seq1.flac'
+                    ]
+                }
+            },
+            voices: {},
+            weather: dummyWeather
+        })).rejects.toThrow(/Unsupported relational operator/);
+    });
+
+    it('can stringify conditions', async () => {
+        expect(await Sequencer({
+            programs: [['sequence 1']],
+            segments: {
+            },
+            sequences: {
+                'sequence 1': {
+                    'conditions': ['weather.feelsLike = {"cur":55.31}'],
+                    'tracks': [
+                        'seq1.flac'
+                    ]
+                }
+            },
+            voices: {},
+            weather: dummyWeather
+        })).to.be.ordered.members(['seq1.flac']);
+    });
+
+    it('can parse voice macros', async () => {
+        expect(await Sequencer({
+            programs: [['sequence 1']],
+            segments: {
+            },
+            sequences: {
+                'sequence 1': {
+                    'tracks': [
+                        '%alice weather.temp.max'
+                    ]
+                }
+            },
+            voices: {
+                "alice": {
+                    "directory": "alice/",
+                    "extension": "flac"
+                }
+            },
+            weather: dummyWeather
+        })).to.be.ordered.members([
+            'alice/fifty.flac',
+            'alice/eight.flac',
+            'alice/point.flac',
+            'alice/zero.flac',
+            'alice/one.flac'
+        ]);
+    });
+});
+

test/stitcher.test.ts

@@ -0,0 +1,90 @@
+import { Stitcher } from '../src/stitcher.js';
+import { describe, expect, it, vi, beforeEach } from 'vitest';
+import { EventEmitter } from 'events';
+import { spawn } from 'child_process';
+
+const mockChildProcess = new (class MockChildProcess
+    extends EventEmitter {
+    kill = vi.fn(() => {
+        return true;
+    });
+})();
+
+vi.mock('child_process', () => {
+    return {
+        spawn: vi.fn(() => mockChildProcess)
+    }
+});
+
+describe('stitcher', () => {
+
+    beforeEach(() => {
+        vi.clearAllMocks();
+    });
+
+    it('passes the correct arguments to ffmpeg', async () => {
+        const p = Stitcher(['1.flac', 'dir/2.flac']);
+        mockChildProcess.emit('exit', 0, null);
+        await p;
+        expect(spawn).toBeCalledWith('ffmpeg', [
+            "-i",
+            '1.flac',
+            '-i',
+            'dir/2.flac',
+            '-filter_complex',
+            '[0:a][1:a][2:a]concat=n=2:v=0:a=1[out]',
+            '-map',
+            '[out]',
+            '-ar',
+            '44100',
+            '-ac',
+            '2',
+            '-c:a',
+            'pcm_s16le',
+            'output.wav',
+            '-y'
+        ]);
+    });
+
+    it('throws an error when ffmpeg fails', async () => {
+        const p = Stitcher(['sound.mp3']);
+        mockChildProcess.emit('exit', 1, null);
+        await expect(p).rejects.toThrow('exited with 1');
+        expect(spawn).toBeCalledWith('ffmpeg', [
+            "-i",
+            'sound.mp3',
+            '-filter_complex',
+            '[0:a][1:a][2:a]concat=n=1:v=0:a=1[out]',
+            '-map',
+            '[out]',
+            '-ar',
+            '44100',
+            '-ac',
+            '2',
+            '-c:a',
+            'pcm_s16le',
+            'output.wav',
+            '-y'
+        ]);
+    });
+
+    it('throws an error when ffmpeg takes longer than expected', { timeout: 6000 }, async () => {
+        await expect(Stitcher(['in.wav'])).rejects.toThrow('timed out');
+        expect(spawn).toBeCalledWith('ffmpeg', [
+            "-i",
+            'in.wav',
+            '-filter_complex',
+            '[0:a][1:a][2:a]concat=n=1:v=0:a=1[out]',
+            '-map',
+            '[out]',
+            '-ar',
+            '44100',
+            '-ac',
+            '2',
+            '-c:a',
+            'pcm_s16le',
+            'output.wav',
+            '-y'
+        ]);
+    });
+});

test/voice.test.ts

@@ -0,0 +1,129 @@
+import path from 'path';
+import { describe, expect, it } from 'vitest';
+import { voiceLines, LINES } from '../src/voice.js';
+import type { Voice } from '../src/voice.js';
+
+const dummyVoice: Voice = {
+    'directory': '',
+    'extension': ''
+};
+
+describe('voiceLines', () => {
+    it('handles integers', () => {
+        expect(voiceLines(dummyVoice, 16549872)).to.be.ordered.members(
+            [
+                LINES.SIX, LINES.TEEN, LINES.MILLION, LINES.FIVE, LINES.HUNDRED, LINES.FORTY,
+                LINES.NINE, LINES.THOUSAND, LINES.EIGHT, LINES.HUNDRED, LINES.SEVENTY, LINES.TWO
+            ]
+        );
+    });
+
+    it('handles floating point', () => {
+        expect(voiceLines(dummyVoice, 672.09435)).to.be.ordered.members(
+            [
+                LINES.SIX, LINES.HUNDRED, LINES.SEVENTY, LINES.TWO, LINES.POINT, LINES.ZERO,
+                LINES.NINE, LINES.FOUR, LINES.THREE, LINES.FIVE
+            ]
+        );
+    });
+
+    it('handles the negative', () => {
+        expect(voiceLines(dummyVoice, -672.09435)).to.be.ordered.members(
+            [
+                LINES.NEGATIVE, LINES.SIX, LINES.HUNDRED, LINES.SEVENTY, LINES.TWO, LINES.POINT, LINES.ZERO,
+                LINES.NINE, LINES.FOUR, LINES.THREE, LINES.FIVE
+            ]
+        );
+    });
+
+    it('handles zero', () => {
+        expect(voiceLines(dummyVoice, 0)).to.be.ordered.members(
+            [
+                LINES.ZERO
+            ]
+        );
+    });
+
+    it('handles large numbers with many zeroes', () => {
+        expect(voiceLines(dummyVoice, 700000000000001)).to.be.ordered.members(
+            [
+                LINES.SEVEN, LINES.HUNDRED, LINES.TRILLION, LINES.ONE
+            ]
+        );
+
+        expect(voiceLines(dummyVoice, 1000001)).to.be.ordered.members(
+            [
+                LINES.ONE, LINES.MILLION, LINES.ONE
+            ]
+        );
+
+        expect(voiceLines(dummyVoice, 9000000001000)).to.be.ordered.members(
+            [
+                LINES.NINE, LINES.TRILLION, LINES.ONE, LINES.THOUSAND
+            ]
+        );
+
+        expect(voiceLines(dummyVoice, 60002000000000.12)).to.be.ordered.members(
+            [
+                LINES.SIXTY, LINES.TRILLION, LINES.TWO, LINES.BILLION, LINES.POINT, LINES.ONE, LINES.TWO
+            ]
+        );
+
+        expect(voiceLines(dummyVoice, 100010001)).to.be.ordered.members(
+            [
+                LINES.ONE, LINES.HUNDRED, LINES.MILLION, LINES.TEN, LINES.THOUSAND, LINES.ONE
+            ]
+        );
+    });
+
+    it('handles irregularly named numbers', () => {
+        expect(voiceLines(dummyVoice, 210)).to.be.ordered.members(
+            [
+                LINES.TWO, LINES.HUNDRED, LINES.TEN
+            ]
+        );
+
+        expect(voiceLines(dummyVoice, 311)).to.be.ordered.members(
+            [
+                LINES.THREE, LINES.HUNDRED, LINES.ELEVEN
+            ]
+        );
+
+        expect(voiceLines(dummyVoice, 412)).to.be.ordered.members(
+            [
+                LINES.FOUR, LINES.HUNDRED, LINES.TWELVE
+            ]
+        );
+
+        expect(voiceLines(dummyVoice, 513)).to.be.ordered.members(
+            [
+                LINES.FIVE, LINES.HUNDRED, LINES.THIRTEEN
+            ]
+        );
+
+        expect(voiceLines(dummyVoice, 615)).to.be.ordered.members(
+            [
+                LINES.SIX, LINES.HUNDRED, LINES.FIFTEEN
+            ]
+        );
+    });
+
+    it('returns empty array if value is unsupported', () => {
+        expect(voiceLines(dummyVoice, Infinity)).length.to.be.empty;
+        expect(voiceLines(dummyVoice, -Infinity)).length.to.be.empty;
+        expect(voiceLines(dummyVoice, NaN)).length.to.be.empty;
+        expect(voiceLines(dummyVoice, 1e21)).length.to.be.empty;
+    });
+
+    it('returns the results as paths when voice configuration is provided', () => {
+        const directory = path.join('audio', 'voice', 'someone');
+        const v: Voice = {
+            directory,
+            extension: 'flac'
+        }
+        expect(voiceLines(v, 29)).to.be.ordered.members([
+            path.join(directory, `twenty.flac`),
+            path.join(directory, `nine.flac`),
+        ]);
+    });
+});

tsconfig.json

@@ -9,9 +9,9 @@
     "moduleResolution": "node16",
     "sourceMap": true,
     "inlineSources": true,
-    "rootDir": "./src",
+    "rootDir": "./",
     "outDir": "./distribution"
   },
-  "include": ["src/**/*"],
+  "include": ["src/**/*", "test/**/*"],
   "exclude": ["**/*.spec.ts"]
 }