Music Maker - App Spec

Final Consenus

# SECTION 1 - SUMMARY/OVERVIEW OF THE APP

The **Music Maker** app is a web application that allows users to create custom music mixes by uploading and combining acapella and instrumental MP3 tracks. Users can input up to three MP3 URLs, specify whether each is an acapella or instrumental, and the app processes these tracks using an API to adjust them to standard BPMs. Users can then select compatible tracks to mix and generate a new combined track, which can be previewed and downloaded.

**Pages Involved:**

1. **Input Page (`InputPage`):** Users enter up to three MP3 URLs and select whether each is an acapella or instrumental using radio buttons. Upon submission, the app sends this data to an API (task 29) which adjusts each track to the nearest standard BPM (50, 60, 70, 80, or 90) and returns the processed tracks.

2. **Build Mix Page (`BuildMixPage`):** Displays the processed tracks in a table showing titles, BPMs, and previews using an HTML5 audio player. Users can select one acapella and one instrumental to mix. The app filters instrumentals based on BPM compatibility (within 10 BPM of the selected acapella). Upon selection, the selected tracks are sent to another API (task 43) to create the mixed track.

3. **Mixes Page (`MixesPage`):** Displays a list of generated mixes with their titles, BPMs, preview players, and download links. New mixes appear at the top, allowing users to preview and download their mixed tracks.

**Key Technical Considerations:**

- **API Integration:** Handling asynchronous API calls for processing and mixing tracks. Ensuring proper data formatting and error handling when communicating with the APIs.

- **State Management:** Managing the application state across multiple pages, including handling user inputs, API responses, and selected tracks.

- **BPM Compatibility Logic:** Implementing logic to filter and enable only compatible instrumentals based on the selected acapella's BPM.

- **Audio Playback:** Utilizing HTML5 audio elements for previewing tracks, ensuring cross-browser compatibility and responsive design.

- **User Input Validation:** Validating MP3 URLs and user selections to prevent errors and improve user experience. Providing feedback during loading and error states.

- **Responsive Design and UI/UX:** Ensuring the app is user-friendly and accessible across various devices and screen sizes.

# SECTION 2 - FILE TREE

```
src/
│
├── components/
│   ├── Navbar.js
│   ├── Navbar.css
│   ├── AudioPlayer.js
│   ├── AudioPlayer.css
│   ├── TrackTable.js
│   └── TrackTable.css
├── pages/
│   ├── InputPage.js
│   ├── InputPage.css
│   ├── BuildMixPage.js
│   ├── BuildMixPage.css
│   ├── MixesPage.js
│   └── MixesPage.css
├── services/
│   └── api.js
├── App.js
└── App.css
```

# SECTION 3 - SUMMARY OF THE FILES

### **App.js**

- **Summary:** The root component of the React application that sets up routing for the app and includes the `Navbar` component. It defines routes for the `InputPage`, `BuildMixPage`, and `MixesPage`.

- **Dependencies:** `react-router-dom` for routing, `Navbar` component.

- **Dependent Files:** All page components (`InputPage`, `BuildMixPage`, `MixesPage`).

- **Notes:** Ensure proper routing setup and that the `Navbar` is consistently displayed across all pages.

---

### **App.css**

- **Summary:** Contains global styles that apply to the entire application, such as font styles and basic layout properties.

- **Dependencies:** None.

- **Dependent Files:** None.

- **Notes:** Use for general styling; specific styles should be placed in individual component or page CSS files to maintain modularity.

---

### **api.js**

- **Summary:** Handles all interactions with the backend APIs for tasks 29 and 43. Contains functions to send data to the APIs and handle the responses.

- **Dependencies:** May use `axios` or the Fetch API for HTTP requests.

- **Dependent Files:** Used by `InputPage.js` and `BuildMixPage.js` for API calls.

- **Notes:** Implement proper error handling and ensure data is correctly formatted as per API requirements. Use placeholder URLs if necessary.

---

### **Navbar.js**

- **Summary:** A reusable navigation bar component that appears on all pages, providing links to the main pages of the app.

- **Dependencies:** `react-router-dom` for navigation links.

- **Dependent Files:** Included in `App.js`.

- **Notes:** Ensure links route correctly and style the navbar for clear navigation.

---

### **Navbar.css**

- **Summary:** Styles specific to the `Navbar` component.

- **Dependencies:** None.

- **Dependent Files:** None (used by `Navbar.js`).

- **Notes:** Ensure the navbar is responsive and consistent across devices.

---

### **AudioPlayer.js**

- **Summary:** A reusable component that wraps the HTML5 `<audio>` element for playing audio files, used for previewing tracks.

- **Dependencies:** None.

- **Dependent Files:** Used in `TrackTable.js`.

- **Notes:** The component should accept props for the audio source and controls. Ensure compatibility with major browsers.

---

### **AudioPlayer.css**

- **Summary:** Styles for the `AudioPlayer` component.

- **Dependencies:** None.

- **Dependent Files:** None (used by `AudioPlayer.js`).

- **Notes:** Customize as much as possible within the constraints of the HTML5 audio element.

---

### **TrackTable.js**

- **Summary:** A component that displays track information in a table format, including titles, BPMs, and preview players. Allows selection of tracks for mixing.

- **Dependencies:** `AudioPlayer` component.

- **Dependent Files:** Used in `BuildMixPage.js` and `MixesPage.js`.

- **Notes:** Implement selection logic and BPM filtering as required.

---

### **TrackTable.css**

- **Summary:** Styles specific to the `TrackTable` component.

- **Dependencies:** None.

- **Dependent Files:** None (used by `TrackTable.js`).

- **Notes:** Ensure the table is readable and responsive.

---

### **InputPage.js**

- **Summary:** A page where users input MP3 URLs and select whether each is an acapella or instrumental. Handles submission to the first API.

- **Dependencies:** May use form components, `api.js` for API calls.

- **Dependent Files:** None (routed in `App.js`).

- **Notes:** Validate inputs, manage form state, and handle loading/error states.

---

### **InputPage.css**

- **Summary:** Styles for the `InputPage`.

- **Dependencies:** None.

- **Dependent Files:** None (used by `InputPage.js`).

- **Notes:** Ensure the form is user-friendly and accessible.

---

### **BuildMixPage.js**

- **Summary:** Displays the processed tracks and allows users to select acapella and instrumental tracks to mix. Handles submission to the second API.

- **Dependencies:** `TrackTable` component, `api.js`.

- **Dependent Files:** None (routed in `App.js`).

- **Notes:** Implement BPM filtering logic and handle user selections.

---

### **BuildMixPage.css**

- **Summary:** Styles for the `BuildMixPage`.

- **Dependencies:** None.

- **Dependent Files:** None (used by `BuildMixPage.js`).

- **Notes:** Ensure the selection process is clear and intuitive.

---

### **MixesPage.js**

- **Summary:** Displays the list of mixed tracks generated, including previews and download links.

- **Dependencies:** `TrackTable` component.

- **Dependent Files:** None (routed in `App.js`).

- **Notes:** Handle the display of multiple mixes and manage the state properly.

---

### **MixesPage.css**

- **Summary:** Styles for the `MixesPage`.

- **Dependencies:** None.

- **Dependent Files:** None (used by `MixesPage.js`).

- **Notes:** Ensure a consistent layout with the rest of the app.

---

# SECTION 4 - CODING SESSION PLAN

---

## **Session 1 - Write `App.js` and `App.css`**

- **Files:** `App.js`, `App.css`

- **Summary:**
  - **App.js:** Set up the root of the application with routing using `react-router-dom`. Include placeholder routes for `InputPage`, `BuildMixPage`, and `MixesPage`. Include the `Navbar` component.
  - **App.css:** Define global styles that will apply across the app.

- **Dependencies:**
  - `react-router-dom` for routing.

- **Things to Watch Out For:**
  - Ensure the `BrowserRouter` is set up correctly.
  - Prepare for integration of components and pages in later sessions.

---

## **Session 2 - Write `api.js`**

- **Files:** `api.js`

- **Summary:**
  - Implement functions to interact with the backend APIs (task 29 and task 43). Include functions for sending data and handling responses.

- **Dependencies:**
  - HTTP client like `axios` or `fetch`.

- **Things to Watch Out For:**
  - Implement proper error handling.
  - Ensure data is formatted according to API requirements.
  - Use placeholder URLs for API endpoints to be updated later.

---

## **Session 3 - Create Core Components (Part 1)**

- **Files:** `Navbar.js`, `Navbar.css`

- **Summary:**
  - **Navbar.js:** Create the navigation bar that includes links to the main pages.
  - **Navbar.css:** Style the navbar for consistency and responsiveness.

- **Dependencies:**
  - `react-router-dom`'s `Link` component.

- **Things to Watch Out For:**
  - Ensure navigation links route correctly.
  - Style the active link for better UX.

---

## **Session 4 - Create Core Components (Part 2)**

- **Files:** `AudioPlayer.js`, `AudioPlayer.css`

- **Summary:**
  - **AudioPlayer.js:** A reusable component for playing audio using the HTML5 `<audio>` element.
  - **AudioPlayer.css:** Style the audio player component.

- **Dependencies:**
  - None significant; accepts props for audio source.

- **Things to Watch Out For:**
  - Ensure cross-browser compatibility.
  - Accept necessary props for flexibility.

---

## **Session 5 - Create Core Components (Part 3)**

- **Files:** `TrackTable.js`, `TrackTable.css`

- **Summary:**
  - **TrackTable.js:** Component to display track information in a table with selections and previews.
  - **TrackTable.css:** Styles for the `TrackTable` component.

- **Dependencies:**
  - `AudioPlayer` component.

- **Things to Watch Out For:**
  - Implement selection logic and BPM filtering.
  - Ensure the table is accessible and responsive.

---

## **Session 6 - Create Pages (Part 1)**

- **Files:** `InputPage.js`, `InputPage.css`

- **Summary:**
  - **InputPage.js:** Page where users input MP3 URLs and select track types. Handle submission to the first API.
  - **InputPage.css:** Style the input form and layout.

- **Dependencies:**
  - `api.js` for API calls.

- **Things to Watch Out For:**
  - Validate user inputs thoroughly.
  - Manage state and handle asynchronous API calls.

---

## **Session 7 - Create Pages (Part 2)**

- **Files:** `BuildMixPage.js`, `BuildMixPage.css`

- **Summary:**
  - **BuildMixPage.js:** Display processed tracks, enable selection of compatible tracks, and handle submission to the second API.
  - **BuildMixPage.css:** Style the selection interface and layout.

- **Dependencies:**
  - `TrackTable` component.
  - `api.js` for API calls.

- **Things to Watch Out For:**
  - Implement BPM compatibility logic correctly.
  - Manage user selections and state transitions.

---

## **Session 8 - Create Pages (Part 3)**

- **Files:** `MixesPage.js`, `MixesPage.css`

- **Summary:**
  - **MixesPage.js:** Display the list of mixed tracks with previews and download options.
  - **MixesPage.css:** Style the mixes list and ensure consistency.

- **Dependencies:**
  - `TrackTable` component (for displaying mixes).

- **Things to Watch Out For:**
  - Handle state for displaying multiple mixes.
  - Ensure new mixes appear first.

---

## **Session 9 - Update `App.js` with Final Integrations**

- **Files:** Update `App.js`

- **Summary:**
  - Integrate all components and pages into `App.js`, ensuring routing and navigation are fully functional. Make any necessary adjustments based on how components and pages have been implemented.

- **Dependencies:**
  - All components and pages.

- **Things to Watch Out For:**
  - Ensure navigation between pages works seamlessly.
  - Check for any missing imports or mismatches.

---

This coding session plan structures the development process into nine logical steps, ensuring that dependencies are properly managed and that the application is built incrementally. Each session builds upon the previous ones, allowing for thorough testing and integration at each stage.

SESSION 1 - APP.JS AND APP.CSS

App.js ##

import React from 'react';
import { BrowserRouter as Router, Routes, Route } from 'react-router-dom';
import Navbar from './components/Navbar';
import InputPage from './pages/InputPage';
import BuildMixPage from './pages/BuildMixPage';
import MixesPage from './pages/MixesPage';
import './App.css';

function App() {
  return (
    <Router>
      <div className="App">
        <Navbar />
        <div className="container">
          <Routes>
            <Route path="/" element={<InputPage />} />
            <Route path="/build-mix" element={<BuildMixPage />} />
            <Route path="/mixes" element={<MixesPage />} />
          </Routes>
        </div>
      </div>
    </Router>
  );
}

export default App;

App.css ##

@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@400;600;700&display=swap');

body {
  font-family: 'Montserrat', sans-serif;
  margin: 0;
  padding: 0;
  background-color: #f0f2f5;
  color: #333;
}

.App {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

h1, h2, h3, h4, h5, h6 {
  margin-bottom: 1rem;
  color: #2c3e50;
}

h1 {
  font-size: 2.5rem;
  text-align: center;
}

button {
  background-color: #3498db;
  color: white;
  border: none;
  padding: 0.5rem 1rem;
  font-size: 1rem;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

button:hover {
  background-color: #2980b9;
}

input, select {
  font-family: 'Montserrat', sans-serif;
  font-size: 1rem;
  padding: 0.5rem;
  margin-bottom: 1rem;
  border: 1px solid #ccc;
  border-radius: 4px;
}

a {
  color: #3498db;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.error {
  color: #e74c3c;
  margin-bottom: 1rem;
}

.success {
  color: #2ecc71;
  margin-bottom: 1rem;
}

SESSION 2 - API.JS

const API_URL = 'https://www.ubub.com/api/project';
const BEARER_TOKEN = process.env.REACT_APP_BEARER_TOKEN;

export const processTrack = async (timestamp, trackData) => {
  try {
    console.log('Processing track:', { timestamp, trackData });
    const response = await fetch(API_URL, {
      method: 'POST',
      headers: {
        'Content-Type': 'application/x-www-form-urlencoded',
        'Authorization': `Bearer ${BEARER_TOKEN}`,
      },
      body: new URLSearchParams({
        'Project[task_id]': '29',
        'ProjectVariable[0][value]': timestamp,
        'ProjectVariable[1][value]': JSON.stringify(trackData),
      }),
    });

if (!response.ok) {
      throw new Error(`HTTP error! status: ${response.status}`);
    }

const data = await response.json();
    console.log('API response:', data);
    return data;
  } catch (error) {
    console.error('API call failed:', error);
    throw error;
  }
};

export const mixTracks = async (timestamp, mixData) => {
  try {
    console.log('Mixing tracks:', { timestamp, mixData });
    const response = await fetch(API_URL, {
      method: 'POST',
      headers: {
        'Content-Type': 'application/x-www-form-urlencoded',
        'Authorization': `Bearer ${BEARER_TOKEN}`,
      },
      body: new URLSearchParams({
        'Project[task_id]': '43',
        'ProjectVariable[0][value]': timestamp,
        'ProjectVariable[1][value]': JSON.stringify(mixData),
      }),
    });

if (!response.ok) {
      throw new Error(`HTTP error! status: ${response.status}`);
    }

const data = await response.json();
    console.log('API response:', data);
    return data;
  } catch (error) {
    console.error('API call failed:', error);
    throw error;
  }
};

SESSION 3 - COMPONENTS PT1

Navbar.js ##

import React from 'react';
import { NavLink } from 'react-router-dom';
import './Navbar.css';

const Navbar = () => {
  return (
    <nav className="navbar">
      <div className="navbar-container">
        <div className="navbar-logo">
          <img src="/logo.png" alt="Music Maker Logo" />
        </div>
        <ul className="navbar-links">
          <li>
            <NavLink to="/" end>
              Input
            </NavLink>
          </li>
          <li>
            <NavLink to="/build-mix">
              Build Mix
            </NavLink>
          </li>
          <li>
            <NavLink to="/mixes">
              Mixes
            </NavLink>
          </li>
        </ul>
      </div>
    </nav>
  );
};

export default Navbar;

Navbar.css ##

.navbar {
  background-color: #231f20;
  padding: 1rem 0;
}

.navbar-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.navbar-logo img {
  height: 40px;
}

.navbar-links {
  list-style-type: none;
  display: flex;
  margin: 0;
  padding: 0;
}

.navbar-links li {
  margin-left: 2rem;
}

.navbar-links a {
  color: white;
  text-decoration: none;
  font-family: 'Montserrat', sans-serif;
  font-size: 1rem;
  transition: color 0.3s ease;
}

.navbar-links a:hover,
.navbar-links a.active {
  color: #f0b148;
}

@media (max-width: 768px) {
  .navbar-container {
    flex-direction: column;
  }

.navbar-links {
    margin-top: 1rem;
  }

.navbar-links li {
    margin: 0 1rem;
  }
}

SECTION 1 - SUMMARY/OVERVIEW OF THE APP

**Pages Involved:**

**Key Technical Considerations:**

- **API Integration:** Handling asynchronous API calls for processing and mixing tracks. Ensuring proper data formatting and error handling when communicating with the APIs.

- **State Management:** Managing the application state across multiple pages, including handling user inputs, API responses, and selected tracks.

- **BPM Compatibility Logic:** Implementing logic to filter and enable only compatible instrumentals based on the selected acapella's BPM.

- **Audio Playback:** Utilizing HTML5 audio elements for previewing tracks, ensuring cross-browser compatibility and responsive design.

- **User Input Validation:** Validating MP3 URLs and user selections to prevent errors and improve user experience. Providing feedback during loading and error states.

- **Responsive Design and UI/UX:** Ensuring the app is user-friendly and accessible across various devices and screen sizes.

SECTION 2 - FILE TREE

SECTION 3 - SUMMARY OF THE FILES

### **App.js**

- **Dependencies:** `react-router-dom` for routing, `Navbar` component.

- **Dependent Files:** All page components (`InputPage`, `BuildMixPage`, `MixesPage`).

- **Notes:** Ensure proper routing setup and that the `Navbar` is consistently displayed across all pages.

---

### **App.css**

- **Summary:** Contains global styles that apply to the entire application, such as font styles and basic layout properties.

- **Dependencies:** None.

- **Dependent Files:** None.

- **Notes:** Use for general styling; specific styles should be placed in individual component or page CSS files to maintain modularity.

---

### **api.js**

- **Summary:** Handles all interactions with the backend APIs for tasks 29 and 43. Contains functions to send data to the APIs and handle the responses.

- **Dependencies:** May use `axios` or the Fetch API for HTTP requests.

- **Dependent Files:** Used by `InputPage.js` and `BuildMixPage.js` for API calls.

- **Notes:** Implement proper error handling and ensure data is correctly formatted as per API requirements. Use placeholder URLs if necessary.

---

### **Navbar.js**

- **Summary:** A reusable navigation bar component that appears on all pages, providing links to the main pages of the app.

- **Dependencies:** `react-router-dom` for navigation links.

- **Dependent Files:** Included in `App.js`.

- **Notes:** Ensure links route correctly and style the navbar for clear navigation.

---

### **Navbar.css**

- **Summary:** Styles specific to the `Navbar` component.

- **Dependencies:** None.

- **Dependent Files:** None (used by `Navbar.js`).

- **Notes:** Ensure the navbar is responsive and consistent across devices.

---

### **AudioPlayer.js**

- **Summary:** A reusable component that wraps the HTML5 `<audio>` element for playing audio files, used for previewing tracks.

- **Dependencies:** None.

- **Dependent Files:** Used in `TrackTable.js`.

- **Notes:** The component should accept props for the audio source and controls. Ensure compatibility with major browsers.

---

### **AudioPlayer.css**

- **Summary:** Styles for the `AudioPlayer` component.

- **Dependencies:** None.

- **Dependent Files:** None (used by `AudioPlayer.js`).

- **Notes:** Customize as much as possible within the constraints of the HTML5 audio element.

---

### **TrackTable.js**

- **Summary:** A component that displays track information in a table format, including titles, BPMs, and preview players. Allows selection of tracks for mixing.

- **Dependencies:** `AudioPlayer` component.

- **Dependent Files:** Used in `BuildMixPage.js` and `MixesPage.js`.

- **Notes:** Implement selection logic and BPM filtering as required.

---

### **TrackTable.css**

- **Summary:** Styles specific to the `TrackTable` component.

- **Dependencies:** None.

- **Dependent Files:** None (used by `TrackTable.js`).

- **Notes:** Ensure the table is readable and responsive.

---

### **InputPage.js**

- **Summary:** A page where users input MP3 URLs and select whether each is an acapella or instrumental. Handles submission to the first API.

- **Dependencies:** May use form components, `api.js` for API calls.

- **Dependent Files:** None (routed in `App.js`).

- **Notes:** Validate inputs, manage form state, and handle loading/error states.

---

### **InputPage.css**

- **Summary:** Styles for the `InputPage`.

- **Dependencies:** None.

- **Dependent Files:** None (used by `InputPage.js`).

- **Notes:** Ensure the form is user-friendly and accessible.

---

### **BuildMixPage.js**

- **Summary:** Displays the processed tracks and allows users to select acapella and instrumental tracks to mix. Handles submission to the second API.

- **Dependencies:** `TrackTable` component, `api.js`.

- **Dependent Files:** None (routed in `App.js`).

- **Notes:** Implement BPM filtering logic and handle user selections.

---

### **BuildMixPage.css**

- **Summary:** Styles for the `BuildMixPage`.

- **Dependencies:** None.

- **Dependent Files:** None (used by `BuildMixPage.js`).

- **Notes:** Ensure the selection process is clear and intuitive.

---

### **MixesPage.js**

- **Summary:** Displays the list of mixed tracks generated, including previews and download links.

- **Dependencies:** `TrackTable` component.

- **Dependent Files:** None (routed in `App.js`).

- **Notes:** Handle the display of multiple mixes and manage the state properly.

---

### **MixesPage.css**

- **Summary:** Styles for the `MixesPage`.

- **Dependencies:** None.

- **Dependent Files:** None (used by `MixesPage.js`).

- **Notes:** Ensure a consistent layout with the rest of the app.

---

SECTION 4 - CODING SESSION PLAN

# SECTION 4 - CODING SESSION PLAN

---

## **Session 1 - Write `App.js` and `App.css`**

- **Files:** `App.js`, `App.css`

- **Dependencies:**
  - `react-router-dom` for routing.

- **Things to Watch Out For:**
  - Ensure the `BrowserRouter` is set up correctly.
  - Prepare for integration of components and pages in later sessions.

---

## **Session 2 - Write `api.js`**

- **Files:** `api.js`

- **Summary:**
  - Implement functions to interact with the backend APIs (task 29 and task 43). Include functions for sending data and handling responses.

- **Dependencies:**
  - HTTP client like `axios` or `fetch`.

- **Things to Watch Out For:**
  - Implement proper error handling.
  - Ensure data is formatted according to API requirements.
  - Use placeholder URLs for API endpoints to be updated later.

---

## **Session 3 - Create Core Components (Part 1)**

- **Files:** `Navbar.js`, `Navbar.css`

- **Summary:**
  - **Navbar.js:** Create the navigation bar that includes links to the main pages.
  - **Navbar.css:** Style the navbar for consistency and responsiveness.

- **Dependencies:**
  - `react-router-dom`'s `Link` component.

- **Things to Watch Out For:**
  - Ensure navigation links route correctly.
  - Style the active link for better UX.

---

## **Session 4 - Create Core Components (Part 2)**

- **Files:** `AudioPlayer.js`, `AudioPlayer.css`

- **Summary:**
  - **AudioPlayer.js:** A reusable component for playing audio using the HTML5 `<audio>` element.
  - **AudioPlayer.css:** Style the audio player component.

- **Dependencies:**
  - None significant; accepts props for audio source.

- **Things to Watch Out For:**
  - Ensure cross-browser compatibility.
  - Accept necessary props for flexibility.

---

## **Session 5 - Create Core Components (Part 3)**

- **Files:** `TrackTable.js`, `TrackTable.css`

- **Summary:**
  - **TrackTable.js:** Component to display track information in a table with selections and previews.
  - **TrackTable.css:** Styles for the `TrackTable` component.

- **Dependencies:**
  - `AudioPlayer` component.

- **Things to Watch Out For:**
  - Implement selection logic and BPM filtering.
  - Ensure the table is accessible and responsive.

---

## **Session 6 - Create Pages (Part 1)**

- **Files:** `InputPage.js`, `InputPage.css`

- **Summary:**
  - **InputPage.js:** Page where users input MP3 URLs and select track types. Handle submission to the first API.
  - **InputPage.css:** Style the input form and layout.

- **Dependencies:**
  - `api.js` for API calls.

- **Things to Watch Out For:**
  - Validate user inputs thoroughly.
  - Manage state and handle asynchronous API calls.

---

## **Session 7 - Create Pages (Part 2)**

- **Files:** `BuildMixPage.js`, `BuildMixPage.css`

- **Dependencies:**
  - `TrackTable` component.
  - `api.js` for API calls.

- **Things to Watch Out For:**
  - Implement BPM compatibility logic correctly.
  - Manage user selections and state transitions.

---

## **Session 8 - Create Pages (Part 3)**

- **Files:** `MixesPage.js`, `MixesPage.css`

- **Summary:**
  - **MixesPage.js:** Display the list of mixed tracks with previews and download options.
  - **MixesPage.css:** Style the mixes list and ensure consistency.

- **Dependencies:**
  - `TrackTable` component (for displaying mixes).

- **Things to Watch Out For:**
  - Handle state for displaying multiple mixes.
  - Ensure new mixes appear first.

---

## **Session 9 - Update `App.js` with Final Integrations**

- **Files:** Update `App.js`

- **Dependencies:**
  - All components and pages.

- **Things to Watch Out For:**
  - Ensure navigation between pages works seamlessly.
  - Check for any missing imports or mismatches.

---

O1 Preview

# SECTION 1 - SUMMARY/OVERVIEW OF THE APP

**Music Maker** is a web application that allows users to create mixed music tracks by combining acapella and instrumental MP3 files. Users can input up to three MP3 URLs, specify whether each is an acapella or instrumental, and have the app adjust the tracks to a standard BPM (Beats Per Minute) through an API. They can then select compatible tracks to mix, and the app will generate a new combined MP3 file.

**Pages Involved:**

1. **Input Page:** Users enter up to three MP3 URLs and select whether each is an acapella or instrumental. Upon submission, the app sends this data to an API that adjusts each track to the nearest standard BPM (50, 60, 70, 80, or 90).

2. **Build Mix Page:** Displays the processed tracks with their titles, BPMs, and preview options using an HTML5 audio player. Users can select one acapella and one instrumental track to mix. The app filters available tracks based on BPM compatibility (within 10 BPM of each other).

3. **Output Page:** Shows the mixed track returned from the second API call. Users can preview the mixed track, download it, and view details such as the title and BPM. Multiple mixes are displayed in a table, sorted with the most recent first.

**Key Technical Considerations:**

- **API Integration:** Handling asynchronous API calls for processing MP3 files and generating the mixed track. Ensuring proper data formatting when sending and receiving JSON data.

- **State Management:** Maintaining the state of uploaded tracks, user selections, and API responses across different pages. Efficiently passing data between components and pages.

- **Audio Playback:** Implementing HTML5 audio players for track previews. Ensuring compatibility across different browsers and devices.

- **User Input Validation:** Validating MP3 URLs and user selections to prevent errors during API calls. Providing user feedback during loading and error states.

- **BPM Filtering Logic:** Accurately filtering available tracks based on BPM to ensure only compatible tracks can be selected for mixing.

# SECTION 2 - FILE TREE

```
src/
│
├── components/
│   ├── Navbar.js
│   ├── Navbar.css
│   ├── AudioPlayer.js
│   └── AudioPlayer.css
├── pages/
│   ├── InputPage.js
│   ├── InputPage.css
│   ├── BuildMixPage.js
│   ├── BuildMixPage.css
│   ├── OutputPage.js
│   └── OutputPage.css
├── services/
│   └── api.js
├── App.js
├── App.css
```

# SECTION 3 - SUMMARY OF THE FILES

### **App.js**

- **Summary:** The root component of the React application. It sets up the routing for the app, integrating all the pages (InputPage, BuildMixPage, OutputPage) and includes the Navbar component.

- **Dependencies:** `react-router-dom` for routing, `Navbar` component, `InputPage`, `BuildMixPage`, `OutputPage`.

- **Dependent Files:** All page components and the Navbar.

- **Notes:** Ensure that all routes are correctly defined and that the Navbar appears on all pages.

---

### **App.css**

- **Summary:** Contains global styles that apply to the entire application.

- **Dependencies:** None (linked in `App.js`).

- **Dependent Files:** None.

- **Notes:** Use for general styles such as fonts and body properties. Specific styling should be in individual component/page CSS files.

---

### **api.js**

- **Summary:** Handles all API interactions with the backend services (task 29 and task 43). Contains functions to send data and receive responses for both API calls.

- **Dependencies:** May use `axios` or the Fetch API for HTTP requests.

- **Dependent Files:** `InputPage.js`, `BuildMixPage.js`.

- **Notes:** Implement error handling and ensure that the data is correctly formatted for the APIs. Use placeholders for API endpoints to be updated later.

---

### **Navbar.js**

- **Summary:** A reusable navigation bar component that appears on all pages, providing links to the Input Page, Build Mix Page, and Output Page.

- **Dependencies:** `react-router-dom`'s `Link` component.

- **Dependent Files:** Included in `App.js`.

- **Notes:** Ensure links are correctly routed. Style for clarity and responsiveness.

---

### **Navbar.css**

- **Summary:** Styles specific to the Navbar component.

- **Dependencies:** None (linked in `Navbar.js`).

- **Dependent Files:** None.

- **Notes:** Style the Navbar for consistency across devices. Pay attention to active link styling.

---

### **AudioPlayer.js**

- **Summary:** A reusable component for playing audio files using the HTML5 `<audio>` element.

- **Dependencies:** None.

- **Dependent Files:** Used in `BuildMixPage.js` and `OutputPage.js`.

- **Notes:** The component should accept props for the audio source and controls. Ensure compatibility across browsers.

---

### **AudioPlayer.css**

- **Summary:** Styles specific to the AudioPlayer component.

- **Dependencies:** None (linked in `AudioPlayer.js`).

- **Dependent Files:** None.

- **Notes:** Customizing audio player controls is limited; focus on layout and responsiveness.

---

### **InputPage.js**

- **Summary:** Allows users to input up to three MP3 URLs and select acapella or instrumental using radio buttons. Submits data to the first API.

- **Dependencies:** `api.js` for API calls, `Navbar`.

- **Dependent Files:** None.

- **Notes:** Validate inputs before submission. Handle loading states and possible API errors gracefully.

---

### **InputPage.css**

- **Summary:** Styles specific to the Input Page.

- **Dependencies:** None (linked in `InputPage.js`).

- **Dependent Files:** None.

- **Notes:** Ensure form elements are clearly labeled and accessible.

---

### **BuildMixPage.js**

- **Summary:** Displays processed MP3s returned from the first API in a table format. Allows users to select one acapella and one instrumental to mix, filtering options based on BPM compatibility.

- **Dependencies:** `api.js` for the second API call, `AudioPlayer` component, `Navbar`.

- **Dependent Files:** None.

- **Notes:** Implement BPM filtering logic carefully. Provide user feedback if no compatible tracks are available.

---

### **BuildMixPage.css**

- **Summary:** Styles specific to the Build Mix Page.

- **Dependencies:** None (linked in `BuildMixPage.js`).

- **Dependent Files:** None.

- **Notes:** Style the table for readability. Ensure selections are intuitive.

---

### **OutputPage.js**

- **Summary:** Displays the mixed track(s) returned from the second API. Users can preview and download the mixed tracks, with the most recent mix shown first.

- **Dependencies:** `AudioPlayer` component, `Navbar`.

- **Dependent Files:** None.

- **Notes:** Manage a list of mixed tracks. Handle cases where the mix is still processing and provide appropriate feedback.

---

### **OutputPage.css**

- **Summary:** Styles specific to the Output Page.

- **Dependencies:** None (linked in `OutputPage.js`).

- **Dependent Files:** None.

- **Notes:** Consistency is key. Ensure that the preview and download options are prominently displayed.

# SECTION 4 - CODING SESSION PLAN

## **Session 1 - Write `App.js` and `App.css`**

- **Filename(s):** `App.js`, `App.css`

- **Summary:**
  - **App.js:** Sets up the root of the application with React Router. Includes routes for `InputPage`, `BuildMixPage`, and `OutputPage`. Placeholder for `Navbar` component.
  - **App.css:** Contains global styles applicable throughout the app.

- **Dependencies:**
  - `react-router-dom` for routing.
  - Will later depend on `Navbar` and page components.

- **Things to Watch Out For:**
  - Ensure routing paths (`/`, `/build-mix`, `/output`) are correctly set.
  - Prepare for integration of the `Navbar` component in Session 7.
  - Confirm that `App.css` is imported and styling is applied.

---

## **Session 2 - Write `api.js`**

- **Filename:** `api.js`

- **Summary:**
  - Contains functions to interact with the backend APIs for task 29 and task 43.
  - Exports functions for submitting MP3 data and retrieving processed/mixed tracks.

- **Dependencies:**
  - HTTP client (`axios` or Fetch API) for making API calls.

- **Things to Watch Out For:**
  - Implement asynchronous functions with proper error handling.
  - Use placeholder URLs for API endpoints to be updated later.
  - Ensure functions return data in a format usable by the pages.

---

## **Session 3 - Create Core Components (Part 1)**

- **Filename(s):** `Navbar.js`, `Navbar.css`

- **Summary:**
  - **Navbar.js:** Renders a navigation bar with links to the Input Page, Build Mix Page, and Output Page.
  - **Navbar.css:** Styles for the Navbar, ensuring a consistent look and feel.

- **Dependencies:**
  - `react-router-dom`'s `Link` component for navigation.
  - `Navbar.css` for styling.

- **Things to Watch Out For:**
  - Ensure links are correctly routing to the specified paths.
  - Highlight the active page in the Navbar.
  - Make the Navbar responsive for different screen sizes.

---

## **Session 4 - Create Core Components (Part 2)**

- **Filename(s):** `AudioPlayer.js`, `AudioPlayer.css`

- **Summary:**
  - **AudioPlayer.js:** A reusable component that wraps the HTML5 `<audio>` element for playing audio files.
  - **AudioPlayer.css:** Styles for the AudioPlayer component.

- **Dependencies:**
  - None significant. Accepts props for audio source and controls.

- **Things to Watch Out For:**
  - Ensure the component accepts necessary props (e.g., `src`, `controls`).
  - Customize the audio player within the limitations of HTML5.
  - Test across different browsers for compatibility.

---

## **Session 5 - Create Pages (Part 1)**

- **Filename(s):**
  - `InputPage.js`, `InputPage.css`
  - `BuildMixPage.js`, `BuildMixPage.css`

- **Summary:**
  - **InputPage.js:** Allows users to input MP3 URLs, select type (acapella or instrumental), and submit data to the API.
  - **InputPage.css:** Styles for the Input Page.
  - **BuildMixPage.js:** Displays processed tracks, allows users to select tracks to mix, and submits selections to the second API.
  - **BuildMixPage.css:** Styles for the Build Mix Page.

- **Dependencies:**
  - `api.js` for API calls.
  - `AudioPlayer` component for previews on `BuildMixPage`.
  - `Navbar` component.

- **Things to Watch Out For:**
  - **InputPage:**
    - Validate MP3 URLs and user selections before submission.
    - Handle loading states during the API call.
    - Provide user feedback on success or error.
  - **BuildMixPage:**
    - Implement BPM filtering logic accurately.
    - Disable or gray out incompatible tracks.
    - Ensure only one acapella and one instrumental can be selected.
    - Handle cases where no compatible tracks are available.

---

## **Session 6 - Create Pages (Part 2)**

- **Filename(s):** `OutputPage.js`, `OutputPage.css`

- **Summary:**
  - **OutputPage.js:** Displays the mixed tracks with options to preview using `AudioPlayer` and download the files.
  - **OutputPage.css:** Styles for the Output Page.

- **Dependencies:**
  - `AudioPlayer` component for track previews.
  - `Navbar` component.

- **Things to Watch Out For:**
  - Manage state to display a list of mixed tracks, sorted by most recent.
  - Ensure the download links are correctly pointing to the MP3 files.
  - Handle the loading state if the mix takes a few minutes to process.
  - Provide user feedback during processing times.

---

## **Session 7 - Update `App.js` with Final Integrations**

- **Filename(s):** `App.js` (updated)

- **Summary:**
  - Integrate the `Navbar` component into `App.js`.
  - Ensure all routes are correctly linked to their respective components.
  - Make any necessary adjustments after all components and pages have been created.

- **Dependencies:**
  - `Navbar` component.
  - All page components (`InputPage`, `BuildMixPage`, `OutputPage`).

- **Things to Watch Out For:**
  - Verify that the `Navbar` appears on all pages.
  - Test all navigation links for correctness.
  - Check for any state that needs to be lifted to `App.js` for sharing between pages.
  - Ensure the app flows seamlessly from one page to another.

---

With this plan, the coding sessions are structured to build the application incrementally, allowing for dependencies to be properly established and tested at each stage.

Sonnet

SECTION 1 - SUMMARY/OVERVIEW OF THE APP

The Music Maker app is a web application that allows users to create custom music mixes by combining acapella and instrumental tracks. Users can upload up to three MP3 files, which are then processed to adjust their tempo. The app facilitates the selection and mixing of compatible tracks, ultimately producing a new, combined MP3 file.

The app consists of three main pages:
1. Input Page: Users upload MP3 files and specify whether each is an acapella or instrumental.
2. Build Mix Page: Displays processed tracks and allows users to select compatible tracks for mixing.
3. Results Page: Shows the final mixed tracks with playback and download options.

Key technical considerations include:
- Integration with two external APIs for audio processing and mixing
- Implementation of audio playback functionality
- Handling of asynchronous operations for API calls and file processing
- Managing state across multiple pages
- Implementing conditional rendering based on BPM compatibility

SECTION 2 - FILE TREE

src/
│
├── components/
│   ├── AudioPlayer.js
│   ├── AudioPlayer.css
│   ├── TrackTable.js
│   ├── TrackTable.css
│   ├── UploadForm.js
│   └── UploadForm.css
├── pages/
│   ├── InputPage.js
│   ├── InputPage.css
│   ├── BuildMixPage.js
│   ├── BuildMixPage.css
│   ├── ResultsPage.js
│   └── ResultsPage.css
├── services/
│   └── api.js
├── App.js
├── App.css

SECTION 3 - SUMMARY OF THE FILES

1. App.js
   - Main component that sets up routing and overall structure
   - Dependencies: React Router, all page components
   - Other files depend on this for routing
   - Watch out for: Proper route setup and navigation logic

2. App.css
   - Global styles for the application
   - No direct dependencies
   - All other CSS files may depend on this for global styles
   - Watch out for: Conflicting styles with component-specific CSS

3. api.js
   - Handles API calls to external services
   - Dependencies: None
   - Used by InputPage.js and BuildMixPage.js
   - Watch out for: Proper error handling and data formatting

4. AudioPlayer.js
   - Reusable component for playing audio files
   - Dependencies: AudioPlayer.css
   - Used by BuildMixPage.js and ResultsPage.js
   - Watch out for: Browser compatibility for audio playback

5. AudioPlayer.css
   - Styles for the AudioPlayer component
   - Dependencies: None
   - Used by AudioPlayer.js
   - Watch out for: Responsive design considerations

6. TrackTable.js
   - Component for displaying track information in a table format
   - Dependencies: TrackTable.css
   - Used by BuildMixPage.js and ResultsPage.js
   - Watch out for: Handling various track states (selected, disabled)

7. TrackTable.css
   - Styles for the TrackTable component
   - Dependencies: None
   - Used by TrackTable.js
   - Watch out for: Ensuring table responsiveness

8. UploadForm.js
   - Component for handling file uploads and track type selection
   - Dependencies: UploadForm.css
   - Used by InputPage.js
   - Watch out for: File type validation and handling multiple uploads

9. UploadForm.css
   - Styles for the UploadForm component
   - Dependencies: None
   - Used by UploadForm.js
   - Watch out for: Styling file input elements consistently across browsers

10. InputPage.js
    - Page component for the initial file upload interface
    - Dependencies: UploadForm.js, api.js
    - No other files depend on this
    - Watch out for: State management for uploaded files

11. InputPage.css
    - Styles for the InputPage component
    - Dependencies: None
    - Used by InputPage.js
    - Watch out for: Layout responsiveness

12. BuildMixPage.js
    - Page component for selecting tracks to mix
    - Dependencies: TrackTable.js, AudioPlayer.js, api.js
    - No other files depend on this
    - Watch out for: Logic for BPM compatibility and track selection

13. BuildMixPage.css
    - Styles for the BuildMixPage component
    - Dependencies: None
    - Used by BuildMixPage.js
    - Watch out for: Styling for different track states (selected, disabled)

14. ResultsPage.js
    - Page component for displaying mixed tracks
    - Dependencies: TrackTable.js, AudioPlayer.js
    - No other files depend on this
    - Watch out for: Handling and displaying API response data

15. ResultsPage.css
    - Styles for the ResultsPage component
    - Dependencies: None
    - Used by ResultsPage.js
    - Watch out for: Styling download links and playback controls

SECTION 4 - CODING SESSION PLAN

Session 1 - Write `App.js` and `App.css`
- Files: App.js, App.css
- Summary: Set up the main application structure and routing
- Dependencies: React Router
- Watch out for: Proper route setup for all three pages

Session 2 - Write `api.js`
- Files: api.js
- Summary: Implement API calls for audio processing and mixing
- Dependencies: None
- Watch out for: Proper error handling and data formatting

Session 3 - Create Core Components (Part 1)
- Files: AudioPlayer.js, AudioPlayer.css
- Summary: Implement reusable audio playback component
- Dependencies: None
- Watch out for: Browser compatibility for audio playback

Session 4 - Create Core Components (Part 2)
- Files: TrackTable.js, TrackTable.css, UploadForm.js, UploadForm.css
- Summary: Implement components for displaying tracks and handling file uploads
- Dependencies: None
- Watch out for: Handling various track states and file type validation

Session 5 - Create Pages (Part 1)
- Files: InputPage.js, InputPage.css
- Summary: Implement the initial file upload interface
- Dependencies: UploadForm.js, api.js
- Watch out for: State management for uploaded files

Session 6 - Create Pages (Part 2)
- Files: BuildMixPage.js, BuildMixPage.css, ResultsPage.js, ResultsPage.css
- Summary: Implement track selection and results display pages
- Dependencies: TrackTable.js, AudioPlayer.js, api.js
- Watch out for: BPM compatibility logic and displaying API response data

Session 7 - Update `App.js` with Final Integrations
- Files: App.js, App.css
- Summary: Finalize routing and overall application structure
- Dependencies: All previously created components and pages
- Watch out for: Ensuring proper navigation flow and state management between pages

Gemini

## SECTION 1 - SUMMARY/OVERVIEW OF THE APP

This Music Maker app allows users to create music mixes by uploading MP3s, converting them to specific BPMs, and combining them.

The app consists of three pages:

1. **Input Page:** Users upload up to three MP3 files, specifying whether each is an acapella or instrumental. They can also choose a target BPM (50, 60, 70, 80, or 90). The uploaded files and their classifications are sent to the API for BPM conversion.

2. **Build Mix Page:** Displays the converted MP3s in a table with their titles, BPMs, and preview players.  Users select one acapella and one instrumental with BPMs within 10 of each other. The selected tracks are then sent to the API for mixing.

3. **Mixes Page:** Shows a history of generated mixes, including their titles, BPMs, preview players, and download links.  Mixes are displayed in reverse chronological order (most recent first).

**Key Technical Considerations:**

* **BPM Matching Logic:** Implement logic to disable instrumental selection based on the chosen acapella's BPM.
* **API Integration:**  Handle API requests, responses, and potential errors.  Pay particular attention to the JSON structure required by each API endpoint.
* **Asynchronous Operations:** Manage asynchronous API calls and loading states.
* **Audio Playback:** Implement HTML5 audio players for previewing tracks.

## SECTION 2 - FILE TREE

```
src/
│
├── components/
│   ├── UploadForm.js
│   ├── UploadForm.css
│   ├── TrackTable.js
│   ├── TrackTable.css
│   ├── AudioPlayer.js
│   └── AudioPlayer.css
│   ├── MixHistory.js
│   └── MixHistory.css
├── pages/
│   ├── InputPage.js
│   ├── InputPage.css
│   ├── BuildMixPage.js
│   ├── BuildMixPage.css
│   ├── MixesPage.js
│   └── MixesPage.css
├── services/
│   └── api.js
├── App.js
└── App.css
```

## SECTION 3 - SUMMARY OF THE FILES

* **App.js:** Main application component, handles routing and navigation.  Dependencies: React Router, all pages.  Dependent files: None.
* **App.css:**  Styling for the main app layout. Dependencies: None. Dependent files: None.
* **api.js:**  Contains functions for making API calls. Dependencies: None. Dependent files: InputPage, BuildMixPage components.
* **components/UploadForm.js:** Component for uploading MP3 files. Dependencies: api.js. Dependent files: InputPage.
* **components/UploadForm.css:** Styling for the upload form. Dependencies: None. Dependent files: None.
* **components/TrackTable.js:** Component for displaying track information including BPM and previews. Depends on: AudioPlayer. Dependent files: BuildMixPage, MixesPage.
* **components/TrackTable.css:** Styling for the track table. Dependencies: None. Dependent files: None.
* **components/AudioPlayer.js:** Reusable component for previewing MP3s. Dependencies: None. Dependent files: TrackTable.
* **components/AudioPlayer.css:** Styles for the audio player. Dependencies: None.  Dependent files: None.
* **components/MixHistory.js:** Component to display mix history with download links and previews. Depends on: TrackTable, api.js.  Dependent files: MixesPage.
* **components/MixHistory.css:** Styles for the mix history. Dependencies: None. Dependent files: None.
* **pages/InputPage.js:**  Handles user input and the first API call. Dependencies: UploadForm, api.js. Dependent files: App.js.
* **pages/InputPage.css:** Styles for the input page. Dependencies: None. Dependent files: None.
* **pages/BuildMixPage.js:** Enables track selection and the second API call. Dependencies: TrackTable, api.js. Dependent files: App.js.
* **pages/BuildMixPage.css:** Styles for the mix building page. Dependencies: None. Dependent files: None.
* **pages/MixesPage.js:** Displays the generated mixes. Dependencies: MixHistory. Dependent files: App.js.  
* **pages/MixesPage.css:** Styles for the mixes page. Dependencies: None. Dependent files: None.

## SECTION 4 - CODING SESSION PLAN

* **Session 1:**
    * `App.js`: Sets up routing and basic app structure. Dependencies: React Router.
    * `App.css`: Basic styles for the app. Dependencies: None.

* **Session 2:**
    * `api.js`: Functions for API interaction. Dependencies: None.  Watch out for: Correct API endpoints and JSON formatting as specified in the original prompt.

* **Session 3:**
    * `components/UploadForm.js`: MP3 upload component. Dependencies: api.js.  Watch out for: handling file uploads and API integration.
    * `components/UploadForm.css`: Styles for upload form.  Dependencies: None.
    * `components/AudioPlayer.js`: Reusable audio player component. Dependencies: None.

* **Session 4:**
    * `components/AudioPlayer.css`: Styles for audio player. Dependencies: None.
    * `components/TrackTable.js`: Displays track info with previews. Depends on: AudioPlayer.js.
    * `components/TrackTable.css`: Styles for the track table. Dependencies: None.

* **Session 5:**
    * `pages/InputPage.js`: Handles initial user input and the first API call. Dependencies: UploadForm, api.js.  Watch out for: API integration and state management.
    * `pages/InputPage.css`: Styles for the input page. Dependencies: None.
    * `components/MixHistory.js`: Displays mix history. Depends on: TrackTable, api.js.

* **Session 6:**
    * `components/MixHistory.css`: Styles for MixHistory. Dependencies: None.
    * `pages/BuildMixPage.js`:  Handles track selection and the second API call. Dependencies: TrackTable, api.js. Watch out for BPM matching logic, API integration, and state management.
    * `pages/BuildMixPage.css`: Styles for the BuildMixPage.

* **Session 7:**
    * `pages/MixesPage.js`: Displays the history of mixed tracks. Dependencies: MixHistory.
    * `pages/MixesPage.css`: Styles for MixesPage. Dependencies: None.
    * Update `App.js`: Final routing and component integration checks after all components and pages are coded.  Dependencies: All pages, components.