### Add MultipartKit to Target Dependencies

Source: https://github.com/vapor/multipart-kit/blob/main/README.md

Link MultipartKit as a product dependency to your application's target.

```swift
.target(name: "MyAppTarget", dependencies: [
    // ...
    .product(name: "MultipartKit", package: "multipart-kit"),
])
```

--------------------------------

### Define Codable Type and Boundary

Source: https://github.com/vapor/multipart-kit/blob/main/Sources/MultipartKit/Docs.docc/index.md

Define a Codable struct for user data and a boundary string for multipart separation. This is a prerequisite for encoding and decoding multipart data.

```swift
struct User: Codable {
    let name: String
    let email: String
}
let user = User(name: "Ed", email: "ed@example.com")
let boundary = "abc123"
```

--------------------------------

### Add MultipartKit to Package Dependencies

Source: https://github.com/vapor/multipart-kit/blob/main/README.md

Include MultipartKit as a dependency in your Swift Package Manager configuration.

```swift
dependencies: [
    // ...
    .package(url: "https://github.com/vapor/multipart-kit.git", from: "4.0.0"),
]
```

--------------------------------

### Define Nested Codable Struct

Source: https://github.com/vapor/multipart-kit/blob/main/README.md

Define a nested Codable struct to demonstrate complex data structures.

```swift
struct Nested: Encodable {
    let tag: String
    let flag: Bool
    let nested: [Nested]
}
let boundary = "abc123"
let nested = Nested(tag: "a", flag: true, nested: [Nested(tag: "b", flag: false, nested: [])])
```

--------------------------------

### Encode Nested Data with FormDataEncoder

Source: https://github.com/vapor/multipart-kit/blob/main/README.md

Encode a nested Codable instance into multipart form data, demonstrating path-based naming.

```swift
let encoded = try FormDataEncoder().encode(nested, boundary: boundary)
```

--------------------------------

### Decode Multipart Form Data to Codable Type

Source: https://github.com/vapor/multipart-kit/blob/main/Sources/MultipartKit/Docs.docc/index.md

Use FormDataDecoder to decode received multipart/form-data back into a Codable type using the same boundary. This reconstructs the original data structure.

```swift
let decoded = try FormDataDecoder().decode(User.self, from: encoded, boundary: boundary)
```

--------------------------------

### Encode Codable Type to Multipart Form Data

Source: https://github.com/vapor/multipart-kit/blob/main/Sources/MultipartKit/Docs.docc/index.md

Use FormDataEncoder to encode a Codable instance into multipart/form-data format using a specified boundary. This prepares data for transmission.

```swift
let encoded = try FormDataEncoder().encode(user, boundary: boundary)
```

--------------------------------

### Encode Nested Structures and Collections

Source: https://github.com/vapor/multipart-kit/blob/main/Sources/MultipartKit/Docs.docc/index.md

Encode complex nested data structures, including arrays, using FormDataEncoder. Array elements are indexed to support deep nesting.

```swift
struct Nested: Encodable {
    let tag: String
    let flag: Bool
    let nested: [Nested]
}
let boundary = "abc123"
let nested = Nested(tag: "a", flag: true, nested: [Nested(tag: "b", flag: false, nested: [])])
let encoded = try FormDataEncoder().encode(nested, boundary: boundary)
```

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