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FeatureFlags.swift
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FeatureFlags.swift
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//
// File.swift
//
//
// Created by Yusuf Tör on 25/08/2022.
//
import Foundation
struct RawFeatureFlag: Decodable {
let key: String
let enabled: Bool
}
struct FeatureFlags: Decodable {
var enableSessionEvents: Bool
var enablePostback: Bool
var enableExpressionParameters: Bool
var enableUserIdSeed: Bool
enum CodingKeys: String, CodingKey {
case toggles
}
init(from decoder: Decoder) throws {
let values = try decoder.container(keyedBy: CodingKeys.self)
let rawFeatureFlags = try values.decode([RawFeatureFlag].self, forKey: .toggles)
enableSessionEvents = rawFeatureFlags.value(forKey: "enable_session_events", default: false)
enableExpressionParameters = rawFeatureFlags.value(forKey: "enable_expression_params", default: false)
enablePostback = rawFeatureFlags.value(forKey: "enable_postback", default: false)
enableUserIdSeed = rawFeatureFlags.value(forKey: "enable_userid_seed", default: false)
}
init(
enableSessionEvents: Bool,
enablePostback: Bool,
enableExpressionParameters: Bool,
enableUserIdSeed: Bool
) {
self.enableSessionEvents = enableSessionEvents
self.enablePostback = enablePostback
self.enableExpressionParameters = enableExpressionParameters
self.enableUserIdSeed = enableUserIdSeed
}
}
// MARK: - Collection Feature Flag Extension
extension Collection where Element == RawFeatureFlag {
func value(
forKey key: String,
default defaultExpression: @autoclosure () -> Bool
) -> Bool {
let featureFlag = first { $0.key == key }
return featureFlag?.enabled ?? defaultExpression()
}
}
// MARK: - Stubbable
extension FeatureFlags: Stubbable {
static func stub() -> FeatureFlags {
return FeatureFlags(
enableSessionEvents: true,
enablePostback: true,
enableExpressionParameters: true,
enableUserIdSeed: true
)
}
}