Creating Repository pattern for use with local .SQLite db in Swift

Question

I am building a SwiftUI app that pulls information from a local .SQLite database (using the SQLite.swift wrapper from https://github.com/stephencelis/SQLite.swift/blob/master/Documentation/Index.md). I need to build a repository that sits between the View Service and the Database Manager. I am very new to repository pattern, and am struggling to find 1) documentation for using repository pattern in Swift 5, and 2) what exactly needs to be in the repository. I found this example for using repository pattern in Swift, but it uses a web-based API for its code examples, and I can't find anything for use with a local db. Code below is what I have in the repository so far:

struct doMaster: Codable {
    let doID: Int64
    let doName: String
    let doState: Bool
    let doCompletedState: Bool
    let doCategory: String
}

struct doDescription: Codable {
    let doID: Int64
    let doDescription: String
}

struct doStreaks: Codable {
    let doID: Int64
    let doStreak: Int64
}

struct doCategories: Codable {
    let category: String
    let categoryColor: String
}

class LocalRepository {
    let path: String = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true).first ?? ""
    let task = 
}

Any help would be very much appreciated. Thank you in advance!