README.md

CodablePersist

Store your awsome Codable objects and retrieve them with ease. CodablePersist gives you a convenient way to store your objects in a disk, UserDefaluts, and memory and manage them easily.

Features

• ✅ Easily save and retrieve any Codable type.
• 📆 Set expiration date to the objects.
• 🔍Time-based storage filtring.
• 🗃Retrieve, delete, save objects using subscript

Example

To quickly show you how CodablePersist can be useful, consider the following use case:

class PostFetcher { 
    typealias Handler = (Result<Post, Error>) -> Void 
    private let cache = DiskStorage<Post>(storeName: "postStorage")
    
    func fetchPost(withID id: Post.ID, then handler: @escaping  Handler) {
    // check if the post is cached or not
    if let cached = cache[id] { return  handler(.success(cached)) } 
    // if not cached fetch it from the backend
    performFetching { [weak self] result in 
        // load post and cache it
        let post = try? result.get() post.map { self?.cache[id] = $0 }
        //then return the result
        handler(result) 
        } 
    } 
}

Installation

CocoaPods

CodablePersist is available through CocoaPods. To install

it, simply add the following line to your Podfile:

pod 'CodablePersist'

Carthage

Carthage is a decentralized dependency manager that builds your dependencies and provides you with binary frameworks.

To integrate CodablePersist into your Xcode project using Carthage, specify it in your Cartfile:

github "engali94/CodablePersist"

Run carthage update to build the framework and drag the built CodablePersist.framework into your Xcode project.

On your application targets’ “Build Phases” settings tab, click the “+” icon and choose “New Run Script Phase” and add the Framework path as mentioned in Carthage Getting started Step 4, 5 and 6

Swift Package Manager

To integrate using Apple's Swift Package Manager, add the following as a dependency to your Package.swift:

dependencies: [

.package(url: "https://github.com/engali94/CodablePersist.git", from: "0.1")

]

Next, add CodablePersist to your targets as follows:

.target(
    name: "YOUR_TARGET_NAME",
    dependencies: [
        "CodablePersist",
    ]
),

Then run swift package update to install the package.

Alternatively navigate to your Xcode project, select Swift Packages and click the + icon to search for CodablePersist.

Manually

If you prefer not to use any of the aforementioned dependency managers, you can integrate CodablePersist into your project manually. Simply drag the Sources Folder into your Xcode project.

Usage

1. Prepare your data

Make sure your type conforms to Identifiable protocol, and assign a unique idKey property like follows:

struct Post: Codable, Identifiable {
   // Identifiable conformance
   static var idKey = \Post.id
  
   var title: String
   var id: String // should be unique per post 
}

2. Initialize Storage

• DiskStorage: We can init a Disk Storage by passing a storeName and expiryDate

   let storage = try? DiskStorage<Post>(storeName: storageName, expiryDate: .minutes(interval: 10))

• UserDefalutsStorage: Also we can init UserDefaults Storage by passing a storeName and expiryDate

  let storage = UserDefaultsStorage<Post>(storeName: storageName, expiryDate: .minutes(interval: 10))! 

• MemoryStorage: This should be used with precaution, if any memory load happens the system will delete some or all objects to free memory. Consider using DiskStorage or UserDefalutsStorage for long term persistence. we can init ``

   let storage = MemoryStorage<Post>(expiryDate: .minutes(interval: 10))

  3. Storage!!

  Now you are good to go... You can persist, retrieve and delete your Codable objects 😎

  Saving

  let singlePost = Post(title: "I'm persistable", id: 1)
  let posts: [Post] = [Post(title: "I'm persistable2", id: 2), Post(title: "I'm persistable3", id: 3)]
  
  //Save a single object
  try? storage.save(singlePost)
  
  // Save single object by subscript
  storage[1] = singlePost
  
  //Save mutliple objects
  try? storage.save(posts)
  

  Retrieval

  // fetch single object
  let post1 = try? storage.fetchObject(for: 1)
  
  // fetch by subscript
  let post2 = storage[2]
  
  // fetch multiple objects
  let multiPosts = try? storage.fetchObjects(for: [3,2])
  
  // fetch all objects in the store sorted by date ascendingly
  let allObjets = try? storage.fetchAllObjects(descending: false)
  
  // fetch only objects saved in las ten minutes 
  // ------(10)++++++(now) -> will only returns ++++++
  let obejetsAfterTenMin = try? storage.fetchObjectsStored(inLast: .minutes(interval: 10)
  
  // fetch object stored before the last 10 minutes
  // ++++++(10)------(now) -> will only returns ++++++
  let obejetsBeforeTemMin = try? storage.fetchObjectsStored(before: .minutes(interval: 10))
  
  // check if an object exists in the storage
  storage.contains(2)
  
  // check the number of objects in the storage
  storage.objectsCount

  Deletion

  // delete a single object
  try? storage.deleteObject(forKey: singlePost.id)
  
  // delete a single object by subscript
  storage[singlePost.id] = nil
  
  // delete multiple posts
  try? storage.deleteObjects(forKeys: [2,3])
  
  // delete all objects
  try? storage.deleteAll()
  
  // Delete expired objects
  storage.deleteExpired()

Requirements

• iOS 8.0+ / macOS 10.10+ / tvOS 9.0+ / watchOS 2.0+
• Xcode 10.0+
• Swift 4.2+

Contributing

Contributions are warmly welcomed 🙌

License

CodablePesist is released under the MIT license. See LICENSE for more information.