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Refactoring

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This commit is contained in:
Justin Mazzocchi 2020-10-15 03:03:39 -07:00
parent 66e7b01282
commit 66bd3c78b9
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GPG key ID: E223E6937AAFB01C
4 changed files with 53 additions and 50 deletions
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15
CodableBloomFilter/Sources/CodableBloomFilter/BloomFilter.swift
View file

@ -2,14 +2,6 @@
import Foundation
// https://en.wikipedia.org/wiki/Bloom_filter
// https://khanlou.com/2018/09/bloom-filters/
// This implementation uses deterministic hashing functions so it can conform to Codable
enum BloomFilterError: Error {
case noHashesProvided
}
public struct BloomFilter<T: DeterministicallyHashable>: Codable {
enum CodingKeys: String, CodingKey {
case hashes
@ -20,12 +12,11 @@ public struct BloomFilter<T: DeterministicallyHashable>: Codable {
private var bits: BitArray
public init(hashes: Set<Hash>, byteCount: Int) throws {
try self.init(hashes: hashes, data: Data(repeating: 0, count: byteCount))
public init(hashes: Set<Hash>, byteCount: Int) {
self.init(hashes: hashes, data: Data(repeating: 0, count: byteCount))
}
public init(hashes: Set<Hash>, data: Data) throws {
guard !hashes.isEmpty else { throw BloomFilterError.noHashesProvided }
public init(hashes: Set<Hash>, data: Data) {
// Sort the hashes for consistent decoding output
self.hashes = Array(hashes.sorted { $0.rawValue < $1.rawValue })
bits = BitArray(data: data)

20
CodableBloomFilter/Tests/CodableBloomFilterTests/CodableBloomFilterTests.swift
View file

@ -12,18 +12,8 @@ final class CodableBloomFilterTests: XCTestCase {
XCTAssertEqual(Hash.fnv1a32.apply("hash"), 3469047761)
}
func noHashesProvided() throws {
XCTAssertThrowsError(try BloomFilter<String>(hashes: [], byteCount: 8)) {
guard case BloomFilterError.noHashesProvided = $0 else {
XCTFail("Expected no hashers provided error")
return
}
}
}
func testContains() throws {
var sut = try BloomFilter<String>(hashes: [.sdbm32, .djb232], byteCount: 8)
var sut = BloomFilter<String>(hashes: [.sdbm32, .djb232], byteCount: 8)
sut.insert("lol")
sut.insert("ok")
@ -35,7 +25,7 @@ final class CodableBloomFilterTests: XCTestCase {
}
func testData() throws {
var sut = try BloomFilter<String>(hashes: [.sdbm32, .djb232], byteCount: 8)
var sut = BloomFilter<String>(hashes: [.sdbm32, .djb232], byteCount: 8)
sut.insert("lol")
sut.insert("ok")
@ -44,7 +34,7 @@ final class CodableBloomFilterTests: XCTestCase {
}
func testFromData() throws {
let sut = try BloomFilter<String>(hashes: [.sdbm32, .djb232], data: Data([0, 16, 0, 0, 0, 2, 0, 144]))
let sut = BloomFilter<String>(hashes: [.sdbm32, .djb232], data: Data([0, 16, 0, 0, 0, 2, 0, 144]))
XCTAssert(sut.contains("lol"))
XCTAssert(sut.contains("ok"))
@ -53,7 +43,7 @@ final class CodableBloomFilterTests: XCTestCase {
}
func testCoding() throws {
var sut = try BloomFilter<String>(hashes: [.sdbm32, .djb232], byteCount: 8)
var sut = BloomFilter<String>(hashes: [.sdbm32, .djb232], byteCount: 8)
let expectedData = Data(#"{"data":"ABAAAAACAJA=","hashes":["djb232","sdbm32"]}"#.utf8)
sut.insert("lol")
@ -88,7 +78,7 @@ final class CodableBloomFilterTests: XCTestCase {
}
func testDataEncodingStrategy() throws {
var sut = try BloomFilter<String>(hashes: [.sdbm32, .djb232], byteCount: 8)
var sut = BloomFilter<String>(hashes: [.sdbm32, .djb232], byteCount: 8)
let expectedData = Data(#"{"data":"0010000000020090","hashes":["djb232","sdbm32"]}"#.utf8)
sut.insert("lol")

46
ServiceLayer/Sources/ServiceLayer/Services/InstanceURLService.swift
View file

@ -61,7 +61,7 @@ public extension InstanceURLService {
func updateFilter() -> AnyPublisher<Never, Error> {
httpClient.request(UpdatedFilterTarget())
.handleEvents(receiveOutput: { userDefaultsClient.updatedInstanceFilter = $0 })
.handleEvents(receiveOutput: { userDefaultsClient.updateInstanceFilter($0) })
.ignoreOutput()
.eraseToAnyPublisher()
}
@ -81,13 +81,43 @@ private struct UpdatedFilterTarget: DecodableTarget {
private extension InstanceURLService {
static let httpsPrefix = "https://"
static let shortestPossibleURLLength = 4
// swiftlint:disable line_length
static let defaultFilterData = #"{"hashes":["djb232","djb2a32","fnv132","fnv1a32","sdbm32"],"data":"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAgAIAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAIAAAAAAgAAAAAQAAAAAABAAACAAAAAAEAAAAAAAAAAAAAAAAAAAAAAAAAAABAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABACAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAIAAAACAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAIAAAAABAAAEAAAAAAAAAAAAAAAAAAAAAABAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABAAAAAAAAAAIAAAAAABAAAAAAAAAAAAAAAAAAAAAQAAAAAAAAAAAAAAQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAEAAAIAAAAAAAAAAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACAAAAAAAAAAAAAAAAAAAAAAAAAAAAACAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACAAAAAAAAAAAAAAAAAAAAAAAAIAAAAAAAAAAABAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACAAAAAAAAAAAAAAAAAAAAAQAAAAAAAAAAAAAAAAAAAAAAAIAAAQAAAAAAAAAAAAAAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAIAAAAAAAAAAAAAAAAAAAAAAAAAAAAAIAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAQAAAAAAAQAAAAAAAAAAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABAADAAAAAAAAAAAAA=="}"#
.data(using: .utf8)!
// swiftlint:enable line_length
// swiftlint:disable force_try
static let defaultFilter = try! JSONDecoder().decode(BloomFilter<String>.self, from: defaultFilterData)
// swiftlint:enable force_try
static let defaultFilter = BloomFilter<String>(
hashes: [.djb232, .djb2a32, .sdbm32, .fnv132, .fnv1a32],
data: Data([
0, 0, 0, 16, 0, 0, 0, 0, 8, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 8, 0, 0, 0, 0, 0, 0, 0, 0,
0, 2, 2, 8, 0, 64, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 32, 0, 0, 0, 0, 0, 0, 18, 0, 0, 0, 0, 0, 0,
128, 0, 0, 32, 0, 128, 0, 0, 0, 4, 16, 4, 32, 0, 0, 16, 16, 4, 32, 0, 0, 128, 0, 16, 0, 0, 0, 0, 0, 0, 0, 4,
0, 0, 0, 0, 4, 0, 0, 3, 2, 0, 0, 0, 4, 0, 0, 4, 0, 0, 0, 0, 0, 0, 0, 0, 132, 0, 0, 64, 0, 0, 0, 2,
0, 0, 0, 0, 0, 0, 64, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 16, 0, 0, 0, 0, 0, 0, 1, 0, 0,
0, 0, 0, 96, 0, 0, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 128, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 0, 8, 0, 1, 0, 8, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 128, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 64, 160,
0, 0, 0, 8, 64, 0, 1, 32, 0, 0, 1, 0, 0, 0, 0, 64, 8, 0, 0, 0, 0, 0, 0, 0, 16, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 128, 0, 32, 0, 0, 0, 0, 0, 130, 65, 0, 4, 0, 0, 0, 0,
0, 0, 0, 8, 0, 0, 0, 0, 128, 65, 0, 0, 0, 0, 16, 0, 0, 0, 0, 0, 0, 0, 64, 0, 0, 64, 0, 128, 0, 0, 0, 16,
0, 0, 0, 0, 16, 0, 0, 0, 0, 0, 0, 2, 128, 0, 1, 0, 0, 0, 0, 0, 0, 0, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 8, 0, 0, 0, 0, 0, 0, 0, 16, 0, 1, 48, 0, 0, 0, 2, 0, 0, 0, 0, 48, 0, 0, 0, 0, 0, 0, 8, 0, 0, 0,
0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 0, 0, 16, 0, 0, 0, 16, 0, 16, 0, 2, 64,
0, 0, 0, 128, 0, 0, 0, 64, 16, 0, 128, 0, 0, 0, 0, 0, 0, 0, 0, 64, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 8, 0, 0, 0, 4, 8, 0, 64, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 66,
0, 64, 0, 16, 8, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 16, 0, 0, 0, 0, 1, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 64, 0, 128, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 0, 10, 0,
0, 4, 0, 0, 0, 1, 24, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 128, 4, 64, 0, 128, 0, 0, 0,
0, 0, 0, 0, 0, 32, 0, 0, 0, 0, 0, 0, 0, 8, 0, 8, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 16, 0, 2, 0, 0, 0,
0, 0, 0, 0, 128, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 64, 0, 129, 8, 0, 8, 0, 0, 0, 8, 0, 0,
0, 2, 0, 0, 128, 8, 36, 32, 0, 64, 0, 0, 0, 4, 0, 32, 0, 0, 0, 0, 0, 16, 2, 0, 0, 0, 2, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 0, 4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 8, 0, 20, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 16, 0, 0, 0, 136, 128, 0, 0, 0, 0, 0, 0,
0, 0, 0, 16, 0, 0, 0, 16, 0, 0, 0, 0, 0, 0, 0, 64, 0, 64, 0, 0, 0, 16, 0, 0, 0, 8, 0, 0, 0, 0, 16, 0,
0, 0, 0, 32, 0, 4, 0, 0, 0, 0, 0, 128, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 64, 0,
0, 0, 0, 8, 0, 4, 64, 0, 0, 0, 0, 0, 0, 0, 0, 0, 16, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 1, 0, 0, 0, 160, 0, 0, 0, 4, 0, 0, 16, 0, 0, 0, 64, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 16, 0, 0, 64,
16, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 16, 0, 0, 0, 4, 0, 1, 0, 0, 0, 16, 0, 0,
0, 0, 0, 0, 0, 0, 128, 0, 4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 4, 0, 64, 0, 1, 4, 0, 0, 0, 0,
0, 0, 0, 0, 64, 0, 0, 0, 0, 0, 0, 0, 0, 0, 16, 0, 0, 0, 128, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 16, 0, 12, 16, 0, 72, 0, 0, 0, 0, 0, 0
]))
var filter: BloomFilter<String> {
userDefaultsClient.updatedInstanceFilter ?? Self.defaultFilter
}

22
ServiceLayer/Sources/ServiceLayer/Utilities/UserDefaultsClient.swift
View file

@ -3,7 +3,7 @@
import CodableBloomFilter
import Foundation
final class UserDefaultsClient {
struct UserDefaultsClient {
private let userDefaults: UserDefaults
init(userDefaults: UserDefaults) {
@ -13,23 +13,15 @@ final class UserDefaultsClient {
extension UserDefaultsClient {
var updatedInstanceFilter: BloomFilter<String>? {
get {
guard let data = self[.updatedFilter] as Data? else {
return nil
}
return try? JSONDecoder().decode(BloomFilter<String>.self, from: data)
guard let data = self[.updatedFilter] as Data? else {
return nil
}
set {
var data: Data?
return try? JSONDecoder().decode(BloomFilter<String>.self, from: data)
}
if let newValue = newValue {
data = try? JSONEncoder().encode(newValue)
}
self[.updatedFilter] = data
}
func updateInstanceFilter( _ filter: BloomFilter<String>) {
userDefaults.set(try? JSONEncoder().encode(filter), forKey: Item.updatedFilter.rawValue)
}
}