Music Maker - App Spec

Final Consenus

## SECTION 1 - SUMMARY/OVERVIEW OF THE APP

**Summary:**

The **Music Maker** app is a React application that enables users to create custom music mixes by combining acapella and instrumental tracks. Users can input up to three MP3 URLs, specify whether each track is an acapella or instrumental, and submit them to an API that adjusts each track to the nearest standard BPM (50, 60, 70, 80, or 90). The app then allows users to select compatible tracks based on BPM to create a new mixed track, which can be previewed, downloaded, and viewed in a history of previous mixes.

**Pages:**

1. **Input Page:**
   - Users provide up to three MP3 URLs.
   - Specify whether each track is an acapella or instrumental using radio buttons.
   - Submit the tracks to an API (Task 29) for BPM adjustment.
   - The API returns the adjusted tracks' URLs, filenames, and titles.

2. **Build Mix Page:**
   - Displays the processed tracks in a table with titles, BPMs, and preview players.
   - Users select one acapella and one instrumental to mix.
   - Instrumentals not within ±10 BPM of the selected acapella are disabled (greyed out).

3. **Mix Results Page:**
   - Displays the newly mixed track with its title, URL, and BPM.
   - Provides options to preview the track using an HTML5 audio player and to download it.
   - Shows a history of previous mixes, most recent first, with similar functionality.

**Key Technical Considerations:**

- **API Integration:** Efficient communication with two external APIs for processing and mixing tracks, handling asynchronous operations, and parsing JSON responses.

- **State Management:** Proper handling of user inputs, API responses, and data flow between pages using React's state management or context APIs.

- **Dynamic UI Updates:** Implementing logic to enable or disable track selections based on BPM compatibility and providing real-time feedback to users.

- **Audio Playback:** Ensuring reliable and cross-browser compatible HTML5 audio playback for track previews.

- **Error Handling and Validation:** Validating user inputs (e.g., MP3 URLs), handling potential API errors gracefully, and providing meaningful feedback to users.

---

## 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
│   ├── MixResultsPage.js
│   └── MixResultsPage.css
├── services/
│   └── api.js
├── App.js
└── App.css
```

---

## SECTION 3 - SUMMARY OF THE FILES

### **App.js**

- **Summary:** The main application component that sets up routing between pages and incorporates global components like `NavBar`.
- **Dependencies:** React Router for navigation, `NavBar.js`.
- **Dependents:** All pages indirectly through routing.
- **Things to Watch Out For:** Ensure correct setup of routing paths and that navigation links correspond to these paths.

### **App.css**

- **Summary:** Contains global styles applicable throughout the app.
- **Dependencies:** None.
- **Dependents:** All components and pages may inherit styles.
- **Things to Watch Out For:** Avoid style conflicts by properly scoping global styles.

---

### **components/NavBar.js**

- **Summary:** Renders the navigation bar with links to the different pages.
- **Dependencies:** React Router's `Link` or `NavLink`.
- **Dependents:** Used in `App.js`.
- **Things to Watch Out For:** Ensure navigation links match the routes defined in `App.js` and handle active link styling.

### **components/NavBar.css**

- **Summary:** Styles specific to the `NavBar` component.
- **Dependencies:** None.
- **Dependents:** `NavBar.js`.
- **Things to Watch Out For:** Ensure responsive design for different screen sizes and consistent styling.

---

### **components/MP3InputForm.js**

- **Summary:** Provides a form for users to input MP3 URLs and specify track types (acapella or instrumental).
- **Dependencies:** React hooks for state management.
- **Dependents:** Used in `InputPage.js`.
- **Things to Watch Out For:** Validate MP3 URLs, manage dynamic addition and removal of up to three inputs, and ensure accessibility.

### **components/MP3InputForm.css**

- **Summary:** Styles specific to the `MP3InputForm` component.
- **Dependencies:** None.
- **Dependents:** `MP3InputForm.js`.
- **Things to Watch Out For:** Align form elements neatly and provide clear visual feedback for validation.

---

### **components/TrackTable.js**

- **Summary:** Displays a table of tracks with details like title, BPM, and a preview player. Allows users to select tracks for mixing.
- **Dependencies:** `AudioPlayer.js`.
- **Dependents:** Used in `BuildMixPage.js` and `MixResultsPage.js`.
- **Things to Watch Out For:** Implement logic to enable or disable track selections based on BPM compatibility, and ensure efficient rendering.

### **components/TrackTable.css**

- **Summary:** Styles specific to the `TrackTable` component.
- **Dependencies:** None.
- **Dependents:** `TrackTable.js`.
- **Things to Watch Out For:** Ensure the table is responsive and maintains readability on various devices.

---

### **components/AudioPlayer.js**

- **Summary:** A reusable component that renders an HTML5 audio player for MP3 previews.
- **Dependencies:** None.
- **Dependents:** Used within `TrackTable.js`.
- **Things to Watch Out For:** Ensure cross-browser compatibility and provide consistent styling for the audio controls.

### **components/AudioPlayer.css**

- **Summary:** Styles specific to the `AudioPlayer` component.
- **Dependencies:** None.
- **Dependents:** `AudioPlayer.js`.
- **Things to Watch Out For:** Customize the audio player appearance while maintaining functionality across different browsers.

---

### **pages/InputPage.js**

- **Summary:** The initial page where users input MP3 URLs and track types, and submit them to the API.
- **Dependencies:** `MP3InputForm.js`, `api.js`, React Router's navigation hooks.
- **Dependents:** Navigated to from `NavBar.js`.
- **Things to Watch Out For:** Handle API calls to submit data, manage navigation to `BuildMixPage` upon success, and display error messages if needed.

### **pages/InputPage.css**

- **Summary:** Styles for the `InputPage`.
- **Dependencies:** None.
- **Dependents:** `InputPage.js`.
- **Things to Watch Out For:** Ensure a user-friendly layout and consistent styling with the rest of the app.

---

### **pages/BuildMixPage.js**

- **Summary:** Displays the processed tracks and allows users to select an acapella and an instrumental to mix.
- **Dependencies:** `TrackTable.js`, `api.js`.
- **Dependents:** Navigated to from `InputPage.js`.
- **Things to Watch Out For:** Implement logic to grey out incompatible tracks based on BPM, and manage submission to the mixing API.

### **pages/BuildMixPage.css**

- **Summary:** Styles for the `BuildMixPage`.
- **Dependencies:** None.
- **Dependents:** `BuildMixPage.js`.
- **Things to Watch Out For:** Maintain a clear and intuitive interface for track selection.

---

### **pages/MixResultsPage.js**

- **Summary:** Displays the final mixed track and a history of previous mixes, with options to preview and download.
- **Dependencies:** `TrackTable.js`.
- **Dependents:** Navigated to from `BuildMixPage.js`.
- **Things to Watch Out For:** Handle cases where the mixing API response is delayed, and manage the display and storage of mix history.

### **pages/MixResultsPage.css**

- **Summary:** Styles for the `MixResultsPage`.
- **Dependencies:** None.
- **Dependents:** `MixResultsPage.js`.
- **Things to Watch Out For:** Ensure the mix history is presented in an organized and accessible manner.

---

### **services/api.js**

- **Summary:** Contains functions to interact with the external APIs for track processing (Task 29) and mixing (Task 43).
- **Dependencies:** Axios or Fetch API for making HTTP requests.
- **Dependents:** Used by `InputPage.js` and `BuildMixPage.js`.
- **Things to Watch Out For:** Handle asynchronous calls properly, manage errors gracefully, and ensure data is formatted according to API specifications.

---

## SECTION 4 - CODING SESSION PLAN

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

- **Files:** `App.js`, `App.css`
- **Summary:**
  - **`App.js`:** Sets up the main application structure, including routing between `InputPage`, `BuildMixPage`, and `MixResultsPage`, and renders the `NavBar` component.
  - **`App.css`:** Contains global styles for the application.
- **Dependencies:** React Router for navigation.
- **Things to Watch Out For:**
  - Ensure proper setup of `BrowserRouter`, `Routes`, and `Route` components.
  - Use placeholders for pages and components that will be created later.
  - Integrate the `NavBar` component correctly once it's created.

---

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

- **Files:** `api.js`
- **Summary:**
  - Implements functions to interact with the external APIs for track processing and mixing.
  - Handles HTTP requests and processes API responses.
- **Dependencies:** Axios or Fetch API for HTTP requests.
- **Things to Watch Out For:**
  - Correctly format the data sent to the APIs according to their specifications.
  - Implement proper error handling for unsuccessful requests.
  - Ensure functions return promises to handle asynchronous operations.

---

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

- **Files:**
  - `NavBar.js`, `NavBar.css`
  - `MP3InputForm.js`, `MP3InputForm.css`
- **Summary:**
  - **`NavBar`:** Creates the navigation bar with links to each page.
  - **`MP3InputForm`:** Provides the form for users to input MP3 URLs and select track types.
- **Dependencies:**
  - `NavBar.js` depends on React Router's `Link` or `NavLink`.
  - `MP3InputForm.js` uses React hooks (`useState`).
- **Things to Watch Out For:**
  - Ensure `NavBar` links correspond to the correct routes.
  - In `MP3InputForm`, validate inputs and manage the dynamic addition/removal of inputs up to three MP3 URLs.

---

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

- **Files:**
  - `TrackTable.js`, `TrackTable.css`
- **Summary:**
  - **`TrackTable`:** Displays a table of tracks with titles, BPMs, and preview players. Allows selection of tracks for mixing.
- **Dependencies:** Will depend on `AudioPlayer.js` (created in the next session).
- **Things to Watch Out For:**
  - Implement logic to enable or disable track selections based on BPM compatibility.
  - Ensure efficient rendering and updating of the table when data changes.

---

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

- **Files:**
  - `AudioPlayer.js`, `AudioPlayer.css`
- **Summary:**
  - **`AudioPlayer`:** A reusable component that renders an HTML5 audio player for MP3 previews.
- **Dependencies:** None.
- **Things to Watch Out For:**
  - Ensure the audio player works consistently across different browsers.
  - Style the audio controls for a consistent look and feel.

---

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

- **Files:**
  - `InputPage.js`, `InputPage.css`
- **Summary:**
  - **`InputPage`:** The initial page where users input MP3 URLs and track types and submit them to the API.
- **Dependencies:** `MP3InputForm.js`, `api.js`, React Router's navigation hooks (e.g., `useNavigate`).
- **Things to Watch Out For:**
  - Handle the submission process and manage the state of user inputs.
  - Upon successful API response, navigate to `BuildMixPage` with necessary data.

---

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

- **Files:**
  - `BuildMixPage.js`, `BuildMixPage.css`
- **Summary:**
  - **`BuildMixPage`:** Displays the processed tracks and allows users to select tracks to mix.
- **Dependencies:** `TrackTable.js`, `api.js`.
- **Things to Watch Out For:**
  - Implement real-time updating of track availability based on BPM selections.
  - Handle the submission of selected tracks to the mixing API (Task 43).

---

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

- **Files:**
  - `MixResultsPage.js`, `MixResultsPage.css`
- **Summary:**
  - **`MixResultsPage`:** Displays the newly mixed track and a history of previous mixes, allowing users to preview and download them.
- **Dependencies:** `TrackTable.js`.
- **Things to Watch Out For:**
  - Manage potential delays in API response (e.g., display loading indicators).
  - Implement persistent storage for mix history if required (e.g., using local storage or state management).

---

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

- **Files:** Update `App.js` and `App.css` if necessary.
- **Summary:**
  - Integrate all components and pages fully into the application.
  - Refine routing and ensure all navigation flows work correctly.
  - Perform any necessary adjustments to global styles.
- **Dependencies:** All previously created components and pages.
- **Things to Watch Out For:**
  - Ensure that the `NavBar` correctly reflects the current page using active link styling.
  - Test the entire app flow from start to finish to identify and fix any issues.
  - Optimize state management, considering the use of React Context or state management libraries if needed.

---

By following this plan, we will methodically build the **Music Maker** app over nine coding sessions, ensuring that all components and pages are properly integrated and functional, and that the app provides a seamless user experience.

SESSION 1 - APP.JS AND APP.CSS

Certainly! I'll provide the code for `App.js` and `App.css` based on the guidelines and requirements you've outlined for the Music Maker app. Here are the files:

App.js ##

```javascript
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 MixResultsPage from './pages/MixResultsPage';
import './App.css';

function App() {
  return (
    <Router>
      <div className="App">
        <NavBar />
        <main className="container">
          <Routes>
            <Route path="/" element={<InputPage />} />
            <Route path="/build-mix" element={<BuildMixPage />} />
            <Route path="/mix-results" element={<MixResultsPage />} />
          </Routes>
        </main>
      </div>
    </Router>
  );
}

export default App;
```

App.css ##

```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 {
  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;
  transition: color 0.3s ease;
}

a:hover {
  color: #2980b9;
  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;
  font-size: 0.9em;
  margin-top: 5px;
}

.success {
  color: #2ecc71;
  font-size: 0.9em;
  margin-top: 5px;
}
```

These files provide a solid foundation for the Music Maker app. The `App.js` file sets up the basic routing structure for the three main pages of the application, while the `App.css` file establishes global styles that will be consistent across the entire app. The styles are clean, modern, and in line with the app's music-related theme.

SECTION 1 - SUMMARY/OVERVIEW OF THE APP

**Summary:**

**Pages:**

**Key Technical Considerations:**

- **API Integration:** Efficient communication with two external APIs for processing and mixing tracks, handling asynchronous operations, and parsing JSON responses.

- **State Management:** Proper handling of user inputs, API responses, and data flow between pages using React's state management or context APIs.

- **Dynamic UI Updates:** Implementing logic to enable or disable track selections based on BPM compatibility and providing real-time feedback to users.

- **Audio Playback:** Ensuring reliable and cross-browser compatible HTML5 audio playback for track previews.

- **Error Handling and Validation:** Validating user inputs (e.g., MP3 URLs), handling potential API errors gracefully, and providing meaningful feedback to users.

SECTION 2 - FILE TREE

SECTION 3 - SUMMARY OF THE FILES

## SECTION 3 - SUMMARY OF THE FILES

### **App.js**

### **App.css**

---

### **components/NavBar.js**

### **components/NavBar.css**

---

### **components/MP3InputForm.js**

### **components/MP3InputForm.css**

---

### **components/TrackTable.js**

### **components/TrackTable.css**

---

### **components/AudioPlayer.js**

### **components/AudioPlayer.css**

---

### **pages/InputPage.js**

### **pages/InputPage.css**

---

### **pages/BuildMixPage.js**

### **pages/BuildMixPage.css**

---

### **pages/MixResultsPage.js**

### **pages/MixResultsPage.css**

---

### **services/api.js**

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

**Overview:**

The **Music Maker** app is a React application that allows users to create customized music mixes by uploading MP3 files. Users can input up to three MP3 URLs, specify whether each is an acapella or instrumental, and have these files adjusted to a standard BPM through an API. The app then enables users to select one acapella and one instrumental with compatible BPMs to create a mixed track, which can be previewed, downloaded, and stored in a mix history.

**Pages:**

1. **Input Page:**
   - Users enter URLs for up to three MP3 files.
   - Specify if each MP3 is an acapella or instrumental using radio buttons.
   - Submit the files to an API (Task 29) that adjusts each track to the nearest standard BPM (50, 60, 70, 80, 90).
   - The API returns the adjusted MP3 URL, filename, and title in JSON format.

2. **Build Mix Page:**
   - Displays the processed MP3 files with their titles, adjusted BPMs, and a preview using an HTML5 audio player.
   - Users select one acapella and one instrumental to mix.
   - Instrumentals outside a ±10 BPM range of the selected acapella are greyed out.
   - Submit the selected tracks to a second API (Task 43) to create the mixed track.

3. **Mix Results Page:**
   - Presents the newly mixed MP3 with its title, URL, and BPM.
   - Provides options to preview the mix using an HTML5 audio player and download it.
   - Displays a history of previous mixes, sorted by the most recent.

**Key Technical Considerations:**

- **API Integration:** Seamless interaction with two external APIs for processing MP3 files.
- **State Management:** Efficiently handling user inputs, API responses, and data flow between pages.
- **User Interface Dynamics:** Enabling/disabling options based on BPM compatibility and providing immediate feedback.
- **Audio Playback:** Implementing reliable HTML5 audio players for previewing tracks.
- **Asynchronous Operations:** Managing API calls that may take a few minutes to complete without freezing the UI.

---

## SECTION 2 - FILE TREE

```
src/
│
├── components/
│   ├── NavBar.js
│   ├── MP3InputForm.js
│   ├── MP3List.js
│   └── AudioPlayer.js
├── pages/
│   ├── InputPage.js
│   ├── BuildMixPage.js
│   └── MixResultsPage.js
├── services/
│   └── api.js
├── App.js
└── App.css
```

---

## SECTION 3 - SUMMARY OF THE FILES

### **App.js**

- **Summary:** The root component of the React app, setting up routing between pages and rendering the `NavBar`.
- **Dependencies:** `NavBar.js`, `InputPage.js`, `BuildMixPage.js`, `MixResultsPage.js`, React Router.
- **Dependents:** All components and pages are indirectly dependent through routing.
- **Notes:** Ensure proper setup of `BrowserRouter` and `Route` components for navigation.

### **App.css**

- **Summary:** Contains global styles and basic layout configurations for the app.
- **Dependencies:** None.
- **Dependents:** `App.js` and potentially all components if common styles are applied.
- **Notes:** Be cautious of style conflicts; use class names judiciously.

### **components/NavBar.js**

- **Summary:** Renders the navigation bar with links to the different pages.
- **Dependencies:** React Router's `Link` or `NavLink` component.
- **Dependents:** Included in `App.js`.
- **Notes:** Ensure links correspond to the correct routes defined in `App.js`.

### **components/MP3InputForm.js**

- **Summary:** Provides a form for users to input MP3 URLs and specify if they are acapella or instrumental.
- **Dependencies:** React hooks for state management (`useState`).
- **Dependents:** Used in `InputPage.js`.
- **Notes:** Handle dynamic addition/removal of MP3 inputs and validate URLs.

### **components/MP3List.js**

- **Summary:** Displays a list or table of MP3 files with titles, BPMs, and preview players.
- **Dependencies:** `AudioPlayer.js`.
- **Dependents:** Used in `BuildMixPage.js` and `MixResultsPage.js`.
- **Notes:** Implement logic to enable/disable selection based on BPM compatibility.

### **components/AudioPlayer.js**

- **Summary:** A reusable component that renders an HTML5 audio player for a given MP3 URL.
- **Dependencies:** None.
- **Dependents:** Used within `MP3List.js`.
- **Notes:** Ensure media controls are user-friendly and responsive across devices.

### **pages/InputPage.js**

- **Summary:** The initial page where users input MP3 URLs and submit them for BPM adjustment.
- **Dependencies:** `MP3InputForm.js`, `api.js`, React Router's `useHistory` or `useNavigate`.
- **Dependents:** Navigated to from the `NavBar`.
- **Notes:** Implement API call to Task 29 and handle navigation upon successful response.

### **pages/BuildMixPage.js**

- **Summary:** Allows users to select one acapella and one instrumental to mix, displaying tracks returned from the first API.
- **Dependencies:** `MP3List.js`, `api.js`.
- **Dependents:** Navigated to from `InputPage.js`.
- **Notes:** Include logic to grey out incompatible instrumentals based on BPM.

### **pages/MixResultsPage.js**

- **Summary:** Displays the final mixed track, with options to preview and download, and a history of mixes.
- **Dependencies:** `MP3List.js`.
- **Dependents:** Navigated to from `BuildMixPage.js`.
- **Notes:** Handle asynchronous loading if API processing time is significant.

### **services/api.js**

- **Summary:** Contains functions for interacting with the external APIs (Tasks 29 and 43).
- **Dependencies:** Axios or Fetch API for HTTP requests.
- **Dependents:** Used by `InputPage.js` and `BuildMixPage.js`.
- **Notes:** Ensure correct data formatting and error handling for API requests and responses.

---

## SECTION 4 - CODING SESSION PLAN

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

- **Files:** `App.js`, `App.css`
- **Summary:**
  - `App.js`: Sets up the main application structure, including routing to `InputPage`, `BuildMixPage`, and `MixResultsPage`, and renders the `NavBar`.
  - `App.css`: Contains global styles for the app.
- **Dependencies:** React Router.
- **Notes:** Use placeholders for pages that will be created later. Ensure the `NavBar` is properly integrated.

---

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

- **Files:** `api.js`
- **Summary:**
  - `api.js`: Implements functions to interact with the APIs for Tasks 29 and 43, handling HTTP requests and processing responses.
- **Dependencies:** Axios or Fetch API.
- **Notes:** Set up functions `adjustBPM` and `mixTracks` corresponding to the two API calls. Handle asynchronous operations and errors.

---

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

- **Files:** `NavBar.js`, `MP3InputForm.js`
- **Summary:**
  - `NavBar.js`: Renders the navigation bar with links to each page.
  - `MP3InputForm.js`: Provides the form for users to input MP3 URLs and select track type.
- **Dependencies:**
  - `NavBar.js`: Depends on React Router for navigation.
  - `MP3InputForm.js`: Utilizes React state hooks.
- **Notes:**
  - Ensure `NavBar` links match the routes in `App.js`.
  - In `MP3InputForm.js`, handle dynamic form fields and validation for up to three MP3 URLs.

---

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

- **Files:** `MP3List.js`, `AudioPlayer.js`
- **Summary:**
  - `MP3List.js`: Displays a list of MP3 files with details and allows selection based on BPM compatibility.
  - `AudioPlayer.js`: Renders an HTML5 audio player for provided MP3 URLs.
- **Dependencies:**
  - `MP3List.js`: Depends on `AudioPlayer.js`.
- **Notes:**
  - Implement logic in `MP3List.js` to grey out incompatible tracks.
  - Ensure `AudioPlayer.js` is reusable and handles various MP3 sources.

---

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

- **Files:** `InputPage.js`, `BuildMixPage.js`
- **Summary:**
  - `InputPage.js`: Utilizes `MP3InputForm` and handles submission to the first API.
  - `BuildMixPage.js`: Uses `MP3List` to display tracks and handle user selection for mixing.
- **Dependencies:**
  - `InputPage.js`: Depends on `MP3InputForm.js`, `api.js`.
  - `BuildMixPage.js`: Depends on `MP3List.js`, `api.js`.
- **Notes:**
  - In `InputPage.js`, manage navigation to `BuildMixPage` after successful API response.
  - In `BuildMixPage.js`, handle user interaction for track selection and submission to the second API.

---

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

- **Files:** `MixResultsPage.js`
- **Summary:**
  - `MixResultsPage.js`: Displays the mixed track, preview player, download link, and mix history.
- **Dependencies:** `MP3List.js`.
- **Notes:**
  - Handle cases where the API response is delayed.
  - Implement mix history functionality, possibly using state management or context.

---

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

- **Files:** Update `App.js` (and possibly `App.css`)
- **Summary:**
  - Integrate all components and pages fully into the application.
  - Refine routing, state management, and ensure all links and navigation flows work correctly.
- **Dependencies:** All previously created components and pages.
- **Notes:**
  - Test the entire app flow from start to finish.
  - Optimize any state or prop drilling issues, possibly introducing context or state management libraries if necessary.

---

By following this plan, we will methodically build the **Music Maker** app over seven coding sessions, ensuring all components and pages are properly integrated and functional.

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 new mixed MP3 file.

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

Key technical considerations:
- Integration with two external APIs for audio processing and mixing
- Handling asynchronous operations for API calls
- Managing state across multiple pages
- Implementing audio playback functionality
- Ensuring responsive design for various devices

SECTION 2 - FILE TREE

src/
│
├── components/
│   ├── Header.js
│   ├── Header.css
│   ├── AudioInput.js
│   ├── AudioInput.css
│   ├── TrackList.js
│   ├── TrackList.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

1. App.js
   - Main component for routing and app structure
   - Dependencies: React Router, Header component
   - Other files depend on this for routing

2. App.css
   - Global styles for the app
   - No dependencies, but affects all components

3. api.js
   - Handles API calls for audio processing and mixing
   - No dependencies, but used by InputPage and BuildMixPage

4. Header.js & Header.css
   - Navigation component
   - Depends on React Router
   - Used in App.js

5. AudioInput.js & AudioInput.css
   - Component for inputting MP3 URLs and selecting track type
   - Used in InputPage.js

6. TrackList.js & TrackList.css
   - Displays list of tracks with selection functionality
   - Uses AudioPlayer component
   - Used in BuildMixPage.js and OutputPage.js

7. AudioPlayer.js & AudioPlayer.css
   - HTML5 audio player component
   - Used in TrackList component

8. InputPage.js & InputPage.css
   - Page for inputting MP3 URLs
   - Uses AudioInput component and api.js

9. BuildMixPage.js & BuildMixPage.css
   - Page for selecting and mixing tracks
   - Uses TrackList component and api.js

10. OutputPage.js & OutputPage.css
    - Page for displaying final mixed tracks
    - Uses TrackList component

SECTION 4 - CODING SESSION PLAN

Session 1 - Write App.js and App.css
Files: App.js, App.css
Summary: Setup 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 audio processing and mixing
Dependencies: None
Watch out for: Proper error handling and response parsing

Session 3 - Create Core Components (Part 1)
Files: Header.js, Header.css, AudioInput.js, AudioInput.css
Summary: Create navigation and audio input components
Dependencies: React Router (for Header)
Watch out for: Responsive design in Header, proper form validation in AudioInput

Session 4 - Create Core Components (Part 2)
Files: AudioPlayer.js, AudioPlayer.css, TrackList.js, TrackList.css
Summary: Implement audio playback and track listing components
Dependencies: AudioPlayer used in TrackList
Watch out for: Browser compatibility for audio playback, efficient rendering of track lists

Session 5 - Create Pages (Part 1)
Files: InputPage.js, InputPage.css
Summary: Implement the input page for MP3 URLs
Dependencies: AudioInput component, api.js
Watch out for: State management for multiple inputs, API call integration

Session 6 - Create Pages (Part 2)
Files: BuildMixPage.js, BuildMixPage.css, OutputPage.js, OutputPage.css
Summary: Implement the build mix and output pages
Dependencies: TrackList component, api.js (for BuildMixPage)
Watch out for: Logic for track compatibility, state management between pages

Session 7 - Update App.js with Final Integrations
Files: App.js, App.css
Summary: Final updates to main app structure and global styles
Dependencies: All previously created components and pages
Watch out for: Ensuring all routes and components are properly integrated, final styling adjustments

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 can input up to three MP3 URLs, classify them, and have them converted to specific BPMs by an API.  They can then select compatible acapella and instrumental tracks on a "Build Mix" page and combine them using a second API call. The final mixed track is displayed on a "Mixes" page with download and preview options.

**Pages:**

1. **Input:** Users submit up to 3 MP3 URLs and select if they are acapella or instrumental.  They then choose a target BPM.
2. **Build Mix:** Displays a table of processed MP3s with previews, allowing users to select one acapella and one instrumental within 10 BPM of each other for mixing.
3. **Mixes:** Displays a list of created mixes with download and preview options.

**Key Technical Considerations:**

- Handling asynchronous API calls and potential errors.
- Client-side validation of MP3 URL inputs and acapella/instrumental selection.
- Dynamically updating the UI based on BPM compatibility between selected tracks.
- Managing state and data flow between components and pages.
- Consider a loading state while waiting for API calls to complete

## SECTION 2 - FILE TREE

```
src/
│
├── components/
│   ├── InputForm.js
│   ├── InputForm.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

- **`App.js`**: Main application component, handles routing and navigation between pages. *Dependencies:* `react-router-dom`. *Dependent files:* All pages.
- **`App.css`**: Styles for the main application layout.
- **`api.js`**: Contains functions for interacting with the APIs (tasks 29 and 43). *Dependencies:*  Potentially `axios` or `fetch` for API calls. *Dependent files:* `InputPage`, `BuildMixPage`.
- **`components/InputForm.js`**: Component for the MP3 URL input form on the Input page. *Dependencies:* None. *Dependent files:* `InputPage`.
- **`components/InputForm.css`**: Styles for `InputForm`.
- **`components/TrackTable.js`**: Component for displaying the table of tracks with BPM and preview on the Build Mix and Mixes pages. *Dependencies:* `AudioPlayer`. *Dependent files:* `BuildMixPage`, `MixesPage`.
- **`components/TrackTable.css`**: Styles for TrackTable.
- **`components/AudioPlayer.js`**: Component for the embedded HTML5 audio player. *Dependencies:* None. *Dependent files:* `TrackTable`.
- **`components/AudioPlayer.css`**: Styles for `AudioPlayer`
- **`pages/InputPage.js`**: Handles user input and interaction with the first API call. *Dependencies:* `InputForm`, `api.js`. *Dependent files:* `App.js`. *Watch out for:* handling multiple file inputs and API response data.
- **`pages/InputPage.css`**: Styles for the InputPage
- **`pages/BuildMixPage.js`**: Displays processed tracks, handles track selection, and interaction with the second API call. *Dependencies:* `TrackTable`, `api.js`. *Dependent files:* `App.js`.  *Watch out for:* dynamic UI updates based on BPM compatibility.
- **`pages/BuildMixPage.css`**: Styles for the BuildMixPage
- **`pages/MixesPage.js`**: Displays a list of generated mixes with download options. *Dependencies:* `TrackTable`. *Dependent files:* `App.js`.
- **`pages/MixesPage.css`**: Styles for the MixesPage

## SECTION 4 - CODING SESSION PLAN

- **Session 1:** `App.js`, `App.css` - Setup basic app structure, routing, and navigation.  Dependencies: `react-router-dom`.
- **Session 2:** `api.js` - Implement API interaction functions.  Dependencies: Potentially `axios` or `fetch` for API calls.  Watch out for: error handling and asynchronous operations.
- **Session 3:** `components/InputForm.js`, `components/InputForm.css`, `components/AudioPlayer.js`, `components/AudioPlayer.css` - Create the input form and audio player components. Dependencies: None for Input form. AudioPlayer - none. Watch out for form handling for input form.
- **Session 4:**  `components/TrackTable.js`, `components/TrackTable.css` - Create the track table component. Dependencies: AudioPlayer.js. Watch out for: dynamic rendering and data handling.
- **Session 5:** `pages/InputPage.js`, `pages/InputPage.css`. Create the input page. Dependencies: InputForm, api.js. Watch out for: API integration and data handling.
- **Session 6:** `pages/BuildMixPage.js`, `pages/BuildMixPage.css`. Create the build mix page. Dependencies: TrackTable, api.js. Watch out for:  BPM logic and API integration.
- **Session 7:**  `pages/MixesPage.js`, `pages/MixesPage.css`, Update `App.js`. Create the mixes page and finalize App.js. Dependencies: TrackTable (MixesPage). App.js dependencies are all pages. Watch out for correct data display on MixesPage and proper integration within App.js.