StrapiSwift - A Swift toolkit to connect to your Strapi backend

This project was built to make it easier to connect your app to your Strapi backend, the open source Headless CMS Front-End Developers love, see more at https://strapi.io/

Setup

This project has dependencies:

• KeyValueStorage: A key-value storage module for Swift projects
• RestService - A light REST service framework for iOS projects

CocoaPods

If you are using CocoaPods, add this to your Podfile and run pod install.

target 'Your target name' do
  pod 'StrapiSwift', '~> 1.0'
end

Manual Installation

If you want to add it manually to your project, without a package manager, just copy all files from the Classes folder to your project.

You have to install the dependencies as well. Please follow their instructions.

Usage

Import StrapiSwift

To use StrapiSwift you just need to import the package:

import StrapiSwift

Start the Service

To start the service, you need to specify your Strapi host in the Strapi instance:

let strapi = Strapi(scheme: .http, host: "localhost", port: 1337)

But you can use the shared instance as well:

let strapi = Strapi.shared
strapi.scheme = .http
strapi.host = "localhost"
strapi.port = 1337

Default routes for Content Types

When you create a content type on Strapi, it will automatically generate a bunch of routes (REST APIs) for that content type, such as create records, read records, update records and destroy records. Sounds familiar? Yes, it has a full CRUD right away! This is one of the amazing things Strapi does. So, StrapiSwift has all of those requests covered, please see below.

Let's say we have a content type named restaurant with a name and price fields. Here are a few examples on how to integrate with it:

CreateRequest (POST)

To start or to grow our database, we can create some records:

let request = CreateRequest(
	contentType: "restaurant",
	parameters: [
		"name": "Super Pizza",
		"price": 3
	]
)
strapi.exec(request: request) { response in
	guard let record = response.dictionaryValue(),
		let id = record["id"] as? Int
		else {
			return
	}
	print("Created record with id: \(id)")
}

CountRequest (GET)

Let's say we want to know how many records we have in this content type, we can count them:

let request = CountRequest(contentType: "restaurant")

strapi.exec(request: request) { response in
	guard let count = response.intValue() else {
		return
	}
	print("Total records: \(count)")
}

QueryRequest (GET)

Now what you want is to search for all restaurants with some filters and sorting:

let request = QueryRequest(contentType: "restaurant")
request.filter(by: "name", contains: "pizza")
request.filter(by: "price", greaterThanOrEqualTo: 3)
request.sort(by: "price")

strapi.exec(request: request) { response in
	guard let list = response.decodableValue(of: [Restaurant].self) else {
		return
	}
	print("Records found: \(list)")
}

FetchRequest (GET)

Sometimes we have just the id of a record and we need to get all its information. For that, we can fetch the record by the id:

let request = FetchRequest(
	contentType: "restaurant",
	id: 10
)

strapi.exec(request: request) { response in
	guard let record = response.decodableValue(of: Restaurant.self) else {
		return
	}
	print("Data retrieved: \(record)")
}

UpdateRequest (PUT)

Wrong price range? No problem, we can update the record:

let request = UpdateRequest(
	contentType: "restaurant",
	id: 10,
	parameters: [
		"price": 5
	]
)

strapi.exec(request: request) { response in
	guard let record = response.decodableValue(of: Restaurant.self) else {
		return
	}
	print("Updated record: \(record)")
}

DestroyRequest (DELETE)

Oh dear, I loved that restaurant! I am sorry that you want to destroy it, but this is how you can do it:

let request = DestroyRequest(
	contentType: "restaurant",
	id: 10
)

strapi.exec(request: request) { response in
	guard let record = response.dictionaryValue() else {
		return
	}
	print("Destroyed record: \(record)")
}

Custom Request (?)

So you want to create your custom request because you have a custom route or just want to do it by yourself, here is how you can do it:

let request = StrapiRequest(
	method: .get,
	contentType: "restaurants", // You can use any route here
	parameters: [
		"price_eq": 3
	]
)

strapi.exec(request: request) { response in
	guard let list = response.decodableValue(of: [Restaurant].self) else {
		return
	}
	print("Data retrieved: \(list)")
}

Users - Permissions

Strapi comes with some amazing plugins and one of them is to manage users and permissions. Here are some cool methods we have for it.

User Registration

Right now, StrapiSwift only works with the local provider for user registration. To do that, you can call it right from the Strapi instance:

strapi.register(
	username: "My name",
	email: "my@email.com",
	password: "VeryStrongPassword@2020") { response in
			
	guard let record = response.decodableValue(of: User.self) else {
		return
	}
	print("New user: \(record)")
}

Login

With the user confirmed, you can easily log in:

strapi.login(
	identifier: "my@email.com",
	password: "VeryStrongPassword@2020") { response in
			
	guard let record = response.decodableValue(of: User.self) else {
		return
	}
	print("Logged in user: \(record)")
}

Forgot Password

If you don't remember your password, here is how you can request an email to reset the password:

strapi.forgotPassword(email: "my@email.com") { response in
	guard let record = response.dictionaryValue() else {
		return
	}
	print("Some data: \(record)")
}

Reset Password

After receiving the email with the code to reset the password, this is how you can reset it:

strapi.resetPassword(
	code: "somerandomcode",
	password: "EvenStrongerPassword@2020",
	passwordConfirmation: "EvenStrongerPassword@2020") { response in
		
	guard let record = response.dictionaryValue() else {
		return
	}
	print("Some data: \(record)")
}

Send Email Confirmation

Hmm, didn't receive the email confirmation? You can ask for it again with this:

strapi.sendEmailConfirmation(email: "my@email.com") { response in
	guard let record = response.dictionaryValue() else {
		return
	}
	print("Some data: \(record)")
}

Me

Now you just want to retrieve your own data (User), it is easy as well:

strapi.me { response in
	guard let record = response.decodableValue(of: User.self) else {
		return
	}
	print("My data: \(record)")
}

User Session

When you use the login method, it will automatically save the retrieved token. If you didn't change the storage property, it will save the token on your Keychain.

If you need to set this token in a request, you can set the interceptor parameter with a StrapiAuthorizationInterceptor instance on the strapi.exec(...) method:

let request = StrapiRequest(
	method: .get,
	contentType: "restaurants", // You can use any route here
	parameters: [
		"price_eq": 3
	]
)

let interceptor = StrapiAuthorizationInterceptor(storage: strapi.storage)

strapi.exec(request: request, interceptor: interceptor) { response in
	guard let list = response.decodableValue(of: [Restaurant].self) else {
		return
	}
	print("Data retrieved: \(list)")
}

You can create your own interceptor, just follow the instructions on the RestService framework.

Upload

Another great plugin is Upload where you can upload files to your Strapi server and create a relation with your record. For instance, it's really easy to send an audio for a message in a chat app.

Data Upload

Let's upload a text file for a record:

let text = "..."

strapi.upload(
	contentType: "about",
	id: 1,
	field: "terms",
	filename: "terms.txt",
	mimeType: "text/plain",
	fileData: text.data(using: .utf8)!) { response in
	
	guard let record = response.dictionaryValue() else {
		return
	}
	print("Some data: \(record)")
}

Image Upload

As we usually do a lot of image uploading, like updating your profile picture, we have a convenience method for that:

let image = UIImage(...)

strapi.upload(
	contentType: "about",
	id: 1,
	field: "terms",
	image: image,
	compressionQuality: 90) { response in
	
	guard let record = response.dictionaryValue() else {
		return
	}
	print("Some data: \(record)")
}

Error Handling

Yes, unfortunately errors can happen, but we can cover some of them. The response object has an error property that will be set when some non-content error happen, like a 500 status returned from the server. Also, your Strapi backend could send some custom error messages in the body of the response, for that you can check the strapiError() method. All you need to do is this:

strapi.exec(request: request) { response in
	if let error = response.error {
		// There was a connection failure
		print(error)
		return
	if let error = response.strapiError() {
		// Oh no, something went wrong with your data :(
		print(error)
		return
	}
	// Cool, no errors!
}

The strapiError() method will return an instance of the StrapiError model. This object has a few useful properties:

• statusCode: (Int) Status code given in the response body
• error: (String) Error text given in the response body
• response: (Data?) Original response from the server
• message: (String?) Text message when the message field is a String in the response body
• messages: ([StrapiMessage]) A list of messages when the message field is an Array in the response body
• data: (Any?) Content of the data field from the response body

ContentType

There is also a special object called ContentType . As you can see, it is very simple:

struct ContentType: RawRepresentable, Equatable, Hashable {
	typealias RawValue = String
	let rawValue: String
	init(rawValue: String) {
		self.rawValue = rawValue
	}
}

With ContentType you can create static properties to avoid using string in your calls. You can use these properties to make requests:

extension ContentType {
	static let restaurant = RestPath(rawValue: "restaurant")
}

let request = FetchRequest(
	contentType: .restaurant,
	id: 10
)

Thanks 👍

The creation of this framework was possible thanks to these awesome people:

• Gray Company: https://www.graycompany.com.br/
• Strapi: https://strapi.io/
• Swift by Sundell: https://www.swiftbysundell.com/
• Hacking with Swift: https://www.hackingwithswift.com/
• Ricardo Rauber: http://ricardorauber.com/

Feedback is welcome

If you notice any issue, got stuck or just want to chat feel free to create an issue. We will be happy to help you.

License

StrapiSwift is released under the MIT License.