Music Maker - App Spec

Final Consenus

**SECTION 1 - SUMMARY/OVERVIEW OF THE APP**

**Summary:**

Music Maker is a React application that allows users to create custom music mixes by uploading or entering URLs for up to three MP3 files. Users specify whether each track is an acapella or instrumental, and the app adjusts each track's BPM (beats per minute) to the nearest value among 50, 60, 70, 80, or 90 BPM using an external API. Users can then select one acapella and one instrumental with compatible BPMs to create a new mixed track, which can be previewed and downloaded.

**Pages Overview:**

1. **Input Page (`InputPage.js`):**
   - Users can input URLs for up to three MP3 files.
   - Specify whether each file is an acapella or instrumental via radio buttons.
   - Upon submission, the app sends the MP3s to the API (Task 29) to adjust their BPM.
   - Receives the processed MP3s (URL, filename, title) from the API in JSON format.

2. **Build Mix Page (`BuildMixPage.js`):**
   - Displays a list of the processed MP3s with their titles, BPMs, and a preview player.
   - Allows users to select one acapella and one instrumental to mix.
   - Greys out tracks that are not within 10 BPM of the selected track.
   - Sends the selected tracks to the API (Task 43) to create the mixed track.

3. **Mixes Page (`MixesPage.js`):**
   - Displays a list of the user's created mixes, ordered with the most recent first.
   - Each mix includes the title, BPM, a download link, and an HTML5 audio player for preview.

**Key Technical Considerations:**

- **API Integration:** Efficient handling of asynchronous API calls, especially since the second API call may take a few minutes to process.
- **State Management:** Managing state across pages to keep track of user inputs, processed tracks, and created mixes, possibly using React Context or a state management library.
- **BPM Matching Logic:** Implementing logic to determine which tracks are compatible based on their BPMs.
- **User Feedback:** Providing feedback during long processing times, such as loading indicators or status messages.
- **Media Handling:** Ensuring that the HTML5 audio players function correctly across different browsers and devices.

---

**SECTION 2 - FILE TREE**

```
src/
│
├── components/
│   ├── Navbar.js
│   ├── Navbar.css
│   ├── MP3InputForm.js
│   ├── MP3InputForm.css
│   ├── TrackTable.js
│   ├── TrackTable.css
│   ├── AudioPlayer.js
│   └── AudioPlayer.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**

1. **App.js**
   - **Summary:** Entry point of the application. Sets up React Router for navigation between pages and renders the Navbar.
   - **Dependencies:** `react-router-dom`, `Navbar.js`, `App.css`.
   - **Dependent Files:** All pages are routed from here.
   - **Notes:** Ensure routing is correctly set up and that the Navbar is consistently rendered across all pages.

2. **App.css**
   - **Summary:** Global CSS styles for the application, including base styles and global themes.
   - **Dependencies:** None.
   - **Dependent Files:** Used by `App.js`, influences styling across the app.
   - **Notes:** Keep styles consistent and consider CSS variables for themes.

3. **services/api.js**
   - **Summary:** Contains functions for interacting with the external APIs (Task 29 and Task 43), handling API calls to process tracks and create mixes.
   - **Dependencies:** May use `fetch` or a library like `axios` for HTTP requests.
   - **Dependent Files:** Used by `InputPage.js`, `BuildMixPage.js`.
   - **Notes:** Pay attention to error handling and manage asynchronous operations efficiently.

4. **components/Navbar.js**
   - **Summary:** Navigation bar component displaying the logo and links to the different pages.
   - **Dependencies:** `Navbar.css`, `react-router-dom` for navigation links.
   - **Dependent Files:** Used by `App.js`.
   - **Notes:** Ensure that navigation links are properly set up and active link styles reflect the current page.

5. **components/Navbar.css**
   - **Summary:** CSS styles specific to the Navbar component.
   - **Dependencies:** None.
   - **Dependent Files:** Applied to `Navbar.js`.
   - **Notes:** Keep the design responsive and intuitive.

6. **components/MP3InputForm.js**
   - **Summary:** Form component allowing users to input MP3 URLs and select acapella or instrumental via radio buttons.
   - **Dependencies:** `MP3InputForm.css`, React hooks (`useState`).
   - **Dependent Files:** Used by `InputPage.js`.
   - **Notes:** Implement form validation and limit inputs to a maximum of three MP3s.

7. **components/MP3InputForm.css**
   - **Summary:** CSS styles specific to the MP3InputForm component.
   - **Dependencies:** None.
   - **Dependent Files:** Applied to `MP3InputForm.js`.
   - **Notes:** Ensure form elements are accessible and user-friendly.

8. **components/TrackTable.js**
   - **Summary:** Component for displaying a list of tracks or mixes in a table format, with title, BPM, and a preview using an HTML5 audio player.
   - **Dependencies:** `TrackTable.css`, `AudioPlayer.js`.
   - **Dependent Files:** Used by `BuildMixPage.js`, `MixesPage.js`.
   - **Notes:** Implement logic to grey out tracks not compatible based on BPM.

9. **components/TrackTable.css**
   - **Summary:** CSS styles specific to the TrackTable component.
   - **Dependencies:** None.
   - **Dependent Files:** Applied to `TrackTable.js`.
   - **Notes:** Ensure the table is responsive and visually organized.

10. **components/AudioPlayer.js**
    - **Summary:** Reusable component for playing MP3 tracks using the HTML5 `<audio>` element.
    - **Dependencies:** `AudioPlayer.css`.
    - **Dependent Files:** Used by `TrackTable.js`.
    - **Notes:** Ensure cross-browser compatibility and responsive design.

11. **components/AudioPlayer.css**
    - **Summary:** CSS styles specific to the AudioPlayer component.
    - **Dependencies:** None.
    - **Dependent Files:** Applied to `AudioPlayer.js`.
    - **Notes:** Style the player controls appropriately.

12. **pages/InputPage.js**
    - **Summary:** Page component rendering the MP3InputForm and handling submission to process tracks via the API.
    - **Dependencies:** `InputPage.css`, `MP3InputForm.js`, `api.js`.
    - **Dependent Files:** Routed from `App.js`.
    - **Notes:** Manage submission and handle API responses; navigate to BuildMixPage upon success.

13. **pages/InputPage.css**
    - **Summary:** CSS styles specific to the InputPage.
    - **Dependencies:** None.
    - **Dependent Files:** Applied to `InputPage.js`.
    - **Notes:** Ensure consistent styling with the rest of the app.

14. **pages/BuildMixPage.js**
    - **Summary:** Page for selecting one acapella and one instrumental track to mix, displaying processed tracks via TrackTable, and handling submission to create a mix.
    - **Dependencies:** `BuildMixPage.css`, `TrackTable.js`, `api.js`.
    - **Dependent Files:** Routed from `App.js`.
    - **Notes:** Implement BPM matching logic; manage state of selected tracks.

15. **pages/BuildMixPage.css**
    - **Summary:** CSS styles specific to the BuildMixPage.
    - **Dependencies:** None.
    - **Dependent Files:** Applied to `BuildMixPage.js`.
    - **Notes:** Design selection interface to be intuitive.

16. **pages/MixesPage.js**
    - **Summary:** Page displaying a list of created mixes, with options to preview and download them.
    - **Dependencies:** `MixesPage.css`, `TrackTable.js`.
    - **Dependent Files:** Routed from `App.js`.
    - **Notes:** Retrieve mixes from state or storage and display them in order.

17. **pages/MixesPage.css**
    - **Summary:** CSS styles specific to the MixesPage.
    - **Dependencies:** None.
    - **Dependent Files:** Applied to `MixesPage.js`.
    - **Notes:** Ensure the list is easy to navigate and visually appealing.

---

**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 with React Router for navigation between `InputPage`, `BuildMixPage`, and `MixesPage`.
  - Include the `Navbar` component in the layout.
- **Dependencies:**
  - `react-router-dom` for routing.
  - `Navbar.js` (placeholder until it's created).
- **Things to Watch Out For:**
  - Correctly configure routing for all pages.
  - Ensure that the `Navbar` is displayed consistently across pages.
  - Use placeholder components for pages that are yet to be created.

---

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

- **Files:**
  - `services/api.js`
- **Summary:**
  - Implement API functions to interact with the external APIs (Task 29 and Task 43).
  - Handle sending data and receiving responses.
- **Dependencies:**
  - HTTP client (`fetch` API or `axios`).
- **Things to Watch Out For:**
  - Ensure correct API endpoints and request formats (JSON).
  - Implement proper error handling.
  - Handle asynchronous operations with promises or async/await.

---

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

- **Files:**
  - `components/Navbar.js`
  - `components/Navbar.css`
  - `components/AudioPlayer.js`
  - `components/AudioPlayer.css`
- **Summary:**
  - Create the `Navbar` component for site navigation.
  - Build the `AudioPlayer` component for playing MP3 tracks.
- **Dependencies:**
  - `react-router-dom` for navigation links in `Navbar`.
- **Things to Watch Out For:**
  - Ensure navigation links are accurate and active link styles are implemented.
  - Ensure `AudioPlayer` is compatible across browsers and devices.

---

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

- **Files:**
  - `components/MP3InputForm.js`
  - `components/MP3InputForm.css`
- **Summary:**
  - Build the `MP3InputForm` component for users to input MP3 URLs and select track types.
- **Dependencies:**
  - React hooks for state management (`useState`).
- **Things to Watch Out For:**
  - Form validation to ensure valid URLs and limit inputs to three MP3s.
  - Design a user-friendly and accessible form.

---

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

- **Files:**
  - `components/TrackTable.js`
  - `components/TrackTable.css`
- **Summary:**
  - Create the `TrackTable` component to display a list of tracks or mixes with title, BPM, and preview player.
- **Dependencies:**
  - `AudioPlayer.js` for the preview player.
- **Things to Watch Out For:**
  - Implement logic to grey out incompatible tracks based on BPM.
  - Ensure the component is reusable for both tracks and mixes.
  - Handle selection of tracks appropriately.

---

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

- **Files:**
  - `pages/InputPage.js`
  - `pages/InputPage.css`
- **Summary:**
  - Build the `InputPage`, integrating `MP3InputForm` and handling form submission and API interaction.
- **Dependencies:**
  - `MP3InputForm.js`
  - `api.js`
- **Things to Watch Out For:**
  - Handle API responses and manage state effectively.
  - Redirect to `BuildMixPage` upon successful processing.
  - Provide user feedback during API calls (e.g., loading indicators).

---

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

- **Files:**
  - `pages/BuildMixPage.js`
  - `pages/BuildMixPage.css`
- **Summary:**
  - Build the `BuildMixPage`, displaying processed tracks and allowing users to select tracks to mix.
- **Dependencies:**
  - `TrackTable.js`
  - `api.js`
- **Things to Watch Out For:**
  - Implement BPM matching logic to enable/disable track selection.
  - Handle submission to the second API and manage the asynchronous response.
  - Provide user feedback during longer processing times.

---

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

- **Files:**
  - `pages/MixesPage.js`
  - `pages/MixesPage.css`
- **Summary:**
  - Build the `MixesPage`, displaying the user's created mixes with options to preview and download them.
- **Dependencies:**
  - `TrackTable.js`
- **Things to Watch Out For:**
  - Retrieve mix data from state or persistent storage.
  - Ensure mixes are displayed in the correct order (most recent first).
  - Handle any necessary data persistence using Firebase if required.

---

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

- **Files:**
  - `App.js` (final updates)
  - `App.css` (if needed)
- **Summary:**
  - Review the application and make any necessary adjustments to routing and component integration.
  - Ensure all components and pages are properly connected.
  - Finalize any styling adjustments in `App.css`.
- **Dependencies:**
  - All previously created components and pages.
- **Things to Watch Out For:**
  - Test the full application flow to ensure seamless navigation and functionality.
  - Clean up any unused code or imports.
  - Check for responsiveness and cross-browser compatibility.

---

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" 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;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 {
  color: #2c3e50;
}

button {
  background-color: #3498db;
  color: white;
  border: none;
  padding: 10px 20px;
  border-radius: 5px;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

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

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

a:hover {
  text-decoration: underline;
}

input[type="text"], input[type="url"] {
  width: 100%;
  padding: 10px;
  margin: 10px 0;
  border: 1px solid #ddd;
  border-radius: 4px;
}

.error {
  color: #e74c3c;
  margin-top: 5px;
}

.success {
  color: #2ecc71;
  margin-top: 5px;
}

SESSION 2 - API.JS

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

export const processMP3s = async (timestamp, mp3Data) => {
  try {
    console.log('Processing MP3s:', { timestamp, mp3Data });
    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(mp3Data),
      }),
    });

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

const data = await response.json();
    console.log('API response for processing MP3s:', data);
    return data;
  } catch (error) {
    console.error('API call for processing MP3s failed:', error);
    throw error;
  }
};

export const createMix = async (timestamp, mixData) => {
  try {
    console.log('Creating mix:', { 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 for creating mix:', data);
    return data;
  } catch (error) {
    console.error('API call for creating mix failed:', error);
    throw error;
  }
};

SECTION 1 - SUMMARY/OVERVIEW OF THE APP

**SECTION 1 - SUMMARY/OVERVIEW OF THE APP**

**Summary:**

**Pages Overview:**

**Key Technical Considerations:**

SECTION 2 - FILE TREE

SECTION 3 - SUMMARY OF THE FILES

**SECTION 3 - SUMMARY OF THE FILES**

SECTION 4 - CODING SESSION PLAN

**SECTION 4 - CODING SESSION PLAN**

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

---

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

---

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

---

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

---

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

---

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

---

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

---

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

---

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

---

O1 Preview

**SECTION 1 - SUMMARY/OVERVIEW OF THE APP**

**Summary:**

Music Maker is a React application that enables users to create custom music mixes by uploading up to three MP3 files and combining them into a new mixed track. Users specify whether each MP3 is an acapella or instrumental, and the app standardizes their BPMs through an API. Users can then select compatible tracks to create a mix, preview it, and download the final combined MP3.

**Pages Overview:**

1. **Input Page (`InputPage.js`):**
   - Users input URLs of up to three MP3 files.
   - Select whether each is an acapella or instrumental using radio buttons.
   - Submits the MP3 data to an API (Task 29) to adjust BPM to the nearest value among 50, 60, 70, 80, or 90 BPM.
   - Receives processed MP3 data (URL, filename, title) from the API.

2. **Build Mix Page (`BuildMixPage.js`):**
   - Displays the processed MP3s with their titles, BPMs, and preview players.
   - Users select one acapella and one instrumental to mix.
   - Tracks with BPMs not within ±10 of each other are greyed out and unselectable.
   - Submits selected tracks to a second API (Task 43) to create the mix.

3. **Mixes Page (`MixesPage.js`):**
   - Displays a list of the user's created mixes, sorted with the most recent first.
   - Each mix includes the title, BPM, a download link, and an HTML5 audio player for previewing.

**Key Technical Considerations:**

- **API Integration:** Handling asynchronous API calls efficiently, especially since the second API call may take several minutes to process.
- **State Management:** Maintaining the state across pages for the uploaded MP3s, processed data, user selections, and final mixes. This may involve using React's Context API or lifting state up to a common ancestor.
- **BPM Matching Logic:** Implementing the logic to enable or disable track selection based on BPM compatibility.
- **User Feedback:** Providing feedback during longer processing times, such as loading indicators or status messages.
- **Media Handling:** Ensuring the HTML5 audio players function correctly across different browsers and devices.

---

**SECTION 2 - FILE TREE**

```
src/
│
├── components/
│   ├── MP3InputForm.js
│   ├── MP3InputForm.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**

1. **App.js**
   - **Summary:** The root component that sets up the application, including routing to different pages and rendering the navigation bar.
   - **Dependencies:** `react-router-dom` for routing, `App.css`.
   - **Dependent Files:** `InputPage.js`, `BuildMixPage.js`, `MixesPage.js`.
   - **Notes:** Ensure proper routing paths for all pages and that the navigation links are functional.

2. **App.css**
   - **Summary:** Global styles for the application, including styles for the navigation bar.
   - **Dependencies:** None.
   - **Dependent Files:** Referenced by `App.js`.
   - **Notes:** Maintain consistent styling across all pages and components.

3. **services/api.js**
   - **Summary:** Contains functions to interact with the backend APIs (Task 29 and Task 43), handling data submission and response retrieval.
   - **Dependencies:** May use `fetch` or `axios` for HTTP requests.
   - **Dependent Files:** `InputPage.js`, `BuildMixPage.js`.
   - **Notes:** Implement error handling and manage asynchronous operations, especially for the API that takes longer to respond.

4. **components/MP3InputForm.js**
   - **Summary:** A form component for users to input MP3 URLs and specify whether each is an acapella or instrumental.
   - **Dependencies:** `MP3InputForm.css`.
   - **Dependent Files:** Used by `InputPage.js`.
   - **Notes:** Validate inputs and limit the number of MP3 entries to three.

5. **components/MP3InputForm.css**
   - **Summary:** Styles specific to the `MP3InputForm` component.
   - **Dependencies:** None.
   - **Dependent Files:** Applied to `MP3InputForm.js`.
   - **Notes:** Ensure the form is user-friendly and accessible.

6. **components/TrackTable.js**
   - **Summary:** Displays a table of tracks with their titles, BPMs, and preview players. Used for both individual tracks and mixes.
   - **Dependencies:** `TrackTable.css`, may utilize HTML5 audio elements.
   - **Dependent Files:** Used by `BuildMixPage.js` and `MixesPage.js`.
   - **Notes:** Implement functionality to grey out incompatible tracks based on BPM.

7. **components/TrackTable.css**
   - **Summary:** Styles specific to the `TrackTable` component.
   - **Dependencies:** None.
   - **Dependent Files:** Applied to `TrackTable.js`.
   - **Notes:** Ensure the table is responsive and easy to read.

8. **pages/InputPage.js**
   - **Summary:** Page component that renders the `MP3InputForm` and handles submission of MP3 data to the API for BPM adjustment.
   - **Dependencies:** `InputPage.css`, `MP3InputForm.js`, `api.js`.
   - **Dependent Files:** Routed from `App.js`.
   - **Notes:** Manage the transition to the `BuildMixPage` upon successful API response.

9. **pages/InputPage.css**
   - **Summary:** Styles specific to the `InputPage`.
   - **Dependencies:** None.
   - **Dependent Files:** Applied to `InputPage.js`.
   - **Notes:** Maintain consistent layout with other pages.

10. **pages/BuildMixPage.js**
    - **Summary:** Allows users to select one acapella and one instrumental track to mix, displaying processed tracks using `TrackTable`.
    - **Dependencies:** `BuildMixPage.css`, `TrackTable.js`, `api.js`.
    - **Dependent Files:** Routed from `App.js`.
    - **Notes:** Implement BPM matching logic and handle submission to the second API.

11. **pages/BuildMixPage.css**
    - **Summary:** Styles specific to the `BuildMixPage`.
    - **Dependencies:** None.
    - **Dependent Files:** Applied to `BuildMixPage.js`.
    - **Notes:** Ensure that the selection interface is intuitive.

12. **pages/MixesPage.js**
    - **Summary:** Displays a list of created mixes, allowing users to preview and download them.
    - **Dependencies:** `MixesPage.css`, `TrackTable.js`.
    - **Dependent Files:** Routed from `App.js`.
    - **Notes:** Retrieve and display mixes in order, handle any data persistence needed.

13. **pages/MixesPage.css**
    - **Summary:** Styles specific to the `MixesPage`.
    - **Dependencies:** None.
    - **Dependent Files:** Applied to `MixesPage.js`.
    - **Notes:** Present mixes in a clear and organized manner.

---

**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 with React Router for navigation between `InputPage`, `BuildMixPage`, and `MixesPage`.
  - Include a navigation bar with links to each page.
- **Dependencies:**
  - `react-router-dom` for routing.
- **Things to Watch Out For:**
  - Ensure routes are correctly defined and that navigation links update the URL without full page refresh.
  - Styling in `App.css` should set a consistent theme for the app.

---

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

- **Files:**
  - `services/api.js`
- **Summary:**
  - Implement functions to interact with the backend APIs (Task 29 and Task 43).
  - Handle sending MP3 data and receiving processed results.
- **Dependencies:**
  - HTTP client (`fetch` API or `axios`).
- **Things to Watch Out For:**
  - Properly format requests and handle responses.
  - Manage asynchronous operations with promises or async/await.
  - Include error handling for network issues or invalid responses.

---

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

- **Files:**
  - `MP3InputForm.js`
  - `MP3InputForm.css`
- **Summary:**
  - Build the form for users to input MP3 URLs and select track types.
  - Validate inputs and limit entries to a maximum of three MP3s.
- **Dependencies:**
  - Form handling with React hooks (`useState`, `useEffect`).
- **Things to Watch Out For:**
  - Ensure dynamic addition/removal of MP3 input fields works smoothly.
  - Provide clear validation messages for invalid inputs.

---

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

- **Files:**
  - `TrackTable.js`
  - `TrackTable.css`
- **Summary:**
  - Create a reusable component to display tracks or mixes in a table format with preview players.
  - Implement functionality to grey out or disable tracks based on BPM compatibility.
- **Dependencies:**
  - HTML5 `<audio>` elements for playback.
- **Things to Watch Out For:**
  - Handle different datasets (processed tracks vs. mixes) appropriately.
  - Ensure that the component is flexible and can be used on multiple pages.

---

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

- **Files:**
  - `InputPage.js`
  - `InputPage.css`
  - `BuildMixPage.js`
  - `BuildMixPage.css`
- **Summary:**
  - **`InputPage.js`:** Integrate `MP3InputForm`, handle submission to the API, and store the returned processed data.
  - **`BuildMixPage.js`:** Use `TrackTable` to display processed tracks, implement selection logic for mixing tracks, and submit selections to the second API.
- **Dependencies:**
  - `MP3InputForm`, `TrackTable`, `api.js`.
- **Things to Watch Out For:**
  - Maintain state between pages, possibly via React Context or props.
  - Provide user feedback during API calls (e.g., loading indicators).

---

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

- **Files:**
  - `MixesPage.js`
  - `MixesPage.css`
- **Summary:**
  - Display the list of created mixes using `TrackTable`, allowing users to preview and download them.
  - Retrieve mixes from the API response or from a storage solution.
- **Dependencies:**
  - `TrackTable`.
- **Things to Watch Out For:**
  - Decide on data persistence (e.g., using Firebase, local state, or local storage).
  - Ensure that mixes are displayed in the correct order (most recent first).

---

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

- **Files:**
  - `App.js` (final updates)
  - `App.css` (if needed)
- **Summary:**
  - Review the application for any necessary adjustments to routing or component integration after all components and pages have been created.
  - Make any final styling tweaks in `App.css`.
- **Dependencies:**
  - All components and pages.
- **Things to Watch Out For:**
  - Test the full application flow to ensure all parts work together seamlessly.
  - Check for any unused imports or code that can be cleaned up.

---

Sonnet

SECTION 1 - SUMMARY/OVERVIEW OF THE APP

The Music Maker app is a three-page React application that allows users to create custom music mixes using acapella and instrumental tracks. Users can input up to three MP3 URLs, which are then processed by an API to adjust their BPM. The app then enables users to select and combine compatible tracks, creating a final mixed track.

Pages:
1. Input Page: Users enter MP3 URLs and specify track types (acapella/instrumental).
2. Build Mix Page: Displays processed tracks, allows selection of compatible tracks for mixing.
3. Final Mix Page: Shows the resulting mixed track with playback and download options.

Key technical considerations:
- Integration with two external APIs for track processing and mixing
- Handling asynchronous operations for API calls
- Implementing audio playback functionality
- Managing state across multiple pages
- Ensuring proper error handling and user feedback

SECTION 2 - FILE TREE

src/
│
├── components/
│   ├── AudioPlayer.js
│   ├── AudioPlayer.css
│   ├── TrackInput.js
│   ├── TrackInput.css
│   ├── TrackList.js
│   ├── TrackList.css
│   ├── MixBuilder.js
│   ├── MixBuilder.css
│   ├── Navbar.js
│   └── Navbar.css
├── pages/
│   ├── InputPage.js
│   ├── InputPage.css
│   ├── BuildMixPage.js
│   ├── BuildMixPage.css
│   ├── FinalMixPage.js
│   └── FinalMixPage.css
├── services/
│   └── api.js
├── App.js
└── App.css

SECTION 3 - SUMMARY OF THE FILES

1. App.js
   - Main component, sets up routing
   - Dependencies: React Router, all page components
   - Other files depend on this for routing

2. App.css
   - Global styles for the app
   - No dependencies, used by App.js

3. api.js
   - Handles API calls for track processing and mixing
   - Dependencies: None
   - Used by InputPage.js and BuildMixPage.js

4. AudioPlayer.js & AudioPlayer.css
   - Reusable audio player component
   - Dependencies: None
   - Used in TrackList.js and FinalMixPage.js

5. TrackInput.js & TrackInput.css
   - Component for inputting track URLs and types
   - Dependencies: None
   - Used in InputPage.js

6. TrackList.js & TrackList.css
   - Displays list of tracks with details
   - Dependencies: AudioPlayer.js
   - Used in BuildMixPage.js

7. MixBuilder.js & MixBuilder.css
   - Handles track selection and mix creation
   - Dependencies: TrackList.js
   - Used in BuildMixPage.js

8. Navbar.js & Navbar.css
   - Navigation component
   - Dependencies: React Router
   - Used in App.js

9. InputPage.js & InputPage.css
   - Page for inputting track URLs
   - Dependencies: TrackInput.js, api.js
   - No other files depend on this

10. BuildMixPage.js & BuildMixPage.css
    - Page for selecting and mixing tracks
    - Dependencies: TrackList.js, MixBuilder.js, api.js
    - No other files depend on this

11. FinalMixPage.js & FinalMixPage.css
    - Displays final mixed track
    - Dependencies: AudioPlayer.js
    - No other files depend on this

SECTION 4 - CODING SESSION PLAN

Session 1 - Write App.js and App.css
Files: App.js, App.css
Summary: Set up the main app 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 track processing and mixing
Dependencies: None
Watch out for: Proper error handling and response parsing

Session 3 - Create Core Components (Part 1)
Files: AudioPlayer.js, AudioPlayer.css, TrackInput.js, TrackInput.css
Summary: Create reusable audio player and track input components
Dependencies: None
Watch out for: Ensuring audio player compatibility across browsers

Session 4 - Create Core Components (Part 2)
Files: TrackList.js, TrackList.css, MixBuilder.js, MixBuilder.css, Navbar.js, Navbar.css
Summary: Implement track listing, mix building, and navigation components
Dependencies: AudioPlayer.js for TrackList.js
Watch out for: Proper state management in MixBuilder.js

Session 5 - Create Pages (Part 1)
Files: InputPage.js, InputPage.css
Summary: Develop the initial input page for track URLs
Dependencies: TrackInput.js, api.js
Watch out for: Proper form validation and API integration

Session 6 - Create Pages (Part 2)
Files: BuildMixPage.js, BuildMixPage.css, FinalMixPage.js, FinalMixPage.css
Summary: Implement the mix building and final mix display pages
Dependencies: TrackList.js, MixBuilder.js, AudioPlayer.js, api.js
Watch out for: Correct data flow between pages and API calls

Session 7 - Update App.js with Final Integrations
Files: App.js, App.css
Summary: Finalize the main app component with all integrations
Dependencies: All previously created components and pages
Watch out for: Ensuring all routes and components are properly connected

Gemini

## SECTION 1 - SUMMARY/OVERVIEW OF THE APP

This Music Maker app allows users to create music mixes by combining acapella and instrumental tracks. Users input up to three MP3 URLs, classify each as either acapella or instrumental, and select a target BPM. The app then sends this data to an API which returns time-stretched MP3s. Users can then select one acapella and one instrumental (with BPMs within 10 of each other) to mix. A second API call combines the selected tracks, returning a new mixed MP3 available for download and preview.

The app will have three pages:

1. **Input:** Users provide MP3 URLs, track types (acapella/instrumental), and target BPM.
2. **Build Mix:** Displays processed tracks, allows selection of one acapella and one instrumental for mixing, and initiates the mixing process.
3. **Mixed Tracks:** Displays completed mixes with download links and previews.

Key technical considerations:

- Handling asynchronous API calls and potential errors.
- Implementing logic for BPM matching and track selection.
- Ensuring efficient data transfer and storage using Firebase.
- Designing a user-friendly interface for track preview and download.

## SECTION 2 - FILE TREE

```
src/
│
├── components/
│   ├── UploadForm.js
│   ├── UploadForm.css
│   ├── TrackList.js
│   ├── TrackList.css
│   ├── AudioPlayer.js
│   └── AudioPlayer.css
├── pages/
│   ├── InputPage.js
│   ├── InputPage.css
│   ├── BuildMixPage.js
│   ├── BuildMixPage.css
│   ├── MixedTracksPage.js
│   └── MixedTracksPage.css
├── services/
│   └── api.js
├── App.js
└── App.css
```

## SECTION 3 - SUMMARY OF THE FILES

- **App.js:** Main app component, handles routing and navigation. Dependencies: React Router. Dependent on by: all pages.
- **App.css:** Styles for the main app. Dependencies: None. Dependent on by: all pages.
- **api.js:** Handles API calls. Dependencies: None. Dependent on by: `InputPage`, `BuildMixPage`.
- **UploadForm.js:** Component for uploading MP3s. Dependencies: None. Dependent on by: `InputPage`.
- **UploadForm.css:** Styles for UploadForm. Dependencies: None.
- **TrackList.js:** Component for displaying track information in a table. Dependencies: `AudioPlayer`.  Dependent on by:  `BuildMixPage`, `MixedTracksPage`.
- **TrackList.css:** Styles for TrackList. Dependencies: None.
- **AudioPlayer.js:** Component for the HTML5 audio player. Dependencies: None. Dependent on by: `TrackList`.
- **AudioPlayer.css:** Styles for AudioPlayer. Dependencies: None.
- **InputPage.js:** Handles user input and submission to the first API. Dependencies: `UploadForm`, `api.js`. Dependent on by: `App.js`.
- **InputPage.css:** Styles for InputPage. Dependencies: None.
- **BuildMixPage.js:**  Displays processed tracks, allows selection, and sends data to the second API. Dependencies:  `TrackList`, `api.js`. Dependent on by: `App.js`.
- **BuildMixPage.css:** Styles for BuildMixPage. Dependencies: None.
- **MixedTracksPage.js:** Displays mixed tracks. Dependencies: `TrackList`. Dependent on by: `App.js`.
- **MixedTracksPage.css:** Styles for MixedTracksPage. Dependencies: None.

## SECTION 4 - CODING SESSION PLAN

- **Session 1:** `App.js`, `App.css`. Setup routing and basic app structure. Dependencies: React Router. Watch out for: Correct routing configuration for all pages.
- **Session 2:** `api.js`. Implement API call functions for both tasks (29 and 43). Dependencies: None. Watch out for: Correct API endpoints and request formats (JSON). Handle asynchronous operations and potential errors.
- **Session 3:** `UploadForm.js`, `UploadForm.css`, `AudioPlayer.js`, `AudioPlayer.css`. Build the upload form and the audio player components. Dependencies: None. Watch out for: Handling file uploads and audio playback.
- **Session 4:** `TrackList.js`, `TrackList.css`. Create the component for displaying track lists. Dependencies: `AudioPlayer`. Watch out for: Dynamically rendering track data and handling BPM filtering.
- **Session 5:** `InputPage.js`, `InputPage.css`. Create the input page for user submissions. Dependencies: `UploadForm`, `api.js`. Watch out for: Handling user input validation and API request.
- **Session 6:** `BuildMixPage.js`, `BuildMixPage.css`. Implement the Build Mix page with track selection and second API call. Dependencies: `TrackList`, `api.js`. Watch out for: BPM matching logic and API request.
- **Session 7:** `MixedTracksPage.js`, `MixedTracksPage.css`, Update `App.js`. Finalize the Mixed Tracks page and integrate all components into the main app. Dependencies: `TrackList`, routing in `App.js`. Watch out for: Displaying mixed tracks and any final routing adjustments.