Swift_Solid_S.swift

class Handler {
    let apiHandler: APIHandler
    let parseHandler: ParseHandler
    let dbHandler: DBHandler
    
    init(apiHandler: APIHandler, parseHandler:parseHandler, dbHandler:DBHandler) {
        self.apiHandler = apiHandler
        self.parseHandler = parseHandler
        self.dbHandler = dbHandler
    }
    
    func handle() {
        let data = apiHandler.requestDataToAPI()
        let array = parseHandler.parse(data: data)
        dbHandler.saveToDB(array: array)
    }
}


class APIHandler {
    func requestDataToAPI() -> Data {
        //send API request and wait the response
    }
}

class ParseHandler {
    func parse(data: Data) -> [String] {
        //parse the data and create the array
    }
}

class DBHandler {
     func saveToDB(array: [String]) {
        // save the array in a database (CoreData/Realm/...)
    } 
}