├── .gitignore
├── .swiftpm
    └── xcode
    │   └── package.xcworkspace
    │       └── contents.xcworkspacedata
├── Alba.xcodeproj
    ├── project.pbxproj
    ├── project.xcworkspace
    │   ├── contents.xcworkspacedata
    │   └── xcshareddata
    │   │   └── IDEWorkspaceChecks.plist
    └── xcshareddata
    │   └── xcschemes
    │       ├── Alba-iOS.xcscheme
    │       ├── Alba-macOS.xcscheme
    │       ├── Alba-tvOS.xcscheme
    │       └── Alba-watchOS.xcscheme
├── Configs
    ├── Alba.plist
    └── AlbaTests.plist
├── LICENSE
├── Package.swift
├── README.md
├── Sources
    ├── Alba.swift
    ├── InformBureau.swift
    ├── Listener.swift
    ├── Publisher.swift
    ├── Subscribe.swift
    └── WeakSubscribe.swift
└── Tests
    └── AlbaTests
        └── AlbaTests.swift


/.gitignore:
--------------------------------------------------------------------------------
 1 | # Xcode
 2 | #
 3 | # gitignore contributors: remember to update Global/Xcode.gitignore, Objective-C.gitignore & Swift.gitignore
 4 | 
 5 | ## Build generated
 6 | build/
 7 | DerivedData/
 8 | 
 9 | ## Various settings
10 | *.pbxuser
11 | !default.pbxuser
12 | *.mode1v3
13 | !default.mode1v3
14 | *.mode2v3
15 | !default.mode2v3
16 | *.perspectivev3
17 | !default.perspectivev3
18 | xcuserdata/
19 | 
20 | ## Other
21 | *.moved-aside
22 | *.xcuserstate
23 | *.DS_Store
24 | 
25 | ## Obj-C/Swift specific
26 | *.hmap
27 | *.ipa
28 | *.dSYM.zip
29 | *.dSYM
30 | 
31 | ## Playgrounds
32 | timeline.xctimeline
33 | playground.xcworkspace
34 | 
35 | # Swift Package Manager
36 | #
37 | # Add this line if you want to avoid checking in source code from Swift Package Manager dependencies.
38 | # Packages/
39 | .build/
40 | 
41 | # CocoaPods
42 | #
43 | # We recommend against adding the Pods directory to your .gitignore. However
44 | # you should judge for yourself, the pros and cons are mentioned at:
45 | # https://guides.cocoapods.org/using/using-cocoapods.html#should-i-check-the-pods-directory-into-source-control
46 | #
47 | # Pods/
48 | 
49 | # Carthage
50 | #
51 | # Add this line if you want to avoid checking in source code from Carthage dependencies.
52 | # Carthage/Checkouts
53 | 
54 | Carthage/Build
55 | 
56 | # fastlane
57 | #
58 | # It is recommended to not store the screenshots in the git repo. Instead, use fastlane to re-generate the
59 | # screenshots whenever they are needed.
60 | # For more information about the recommended setup visit:
61 | # https://github.com/fastlane/fastlane/blob/master/fastlane/docs/Gitignore.md
62 | 
63 | fastlane/report.xml
64 | fastlane/Preview.html
65 | fastlane/screenshots
66 | fastlane/test_output


--------------------------------------------------------------------------------
/.swiftpm/xcode/package.xcworkspace/contents.xcworkspacedata:
--------------------------------------------------------------------------------
1 | <?xml version="1.0" encoding="UTF-8"?>
2 | <Workspace
3 |    version = "1.0">
4 |    <FileRef
5 |       location = "self:">
6 |    </FileRef>
7 | </Workspace>
8 | 


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64 |             BuildableIdentifier = "primary"
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80 |             BuildableIdentifier = "primary"
81 |             BlueprintIdentifier = "52D6DA0E1BF000BD002C0205"
82 |             BuildableName = "Alba.framework"
83 |             BlueprintName = "Alba-macOS"
84 |             ReferencedContainer = "container:Alba.xcodeproj">
85 |          </BuildableReference>
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89 |       buildConfiguration = "Debug">
90 |    </AnalyzeAction>
91 |    <ArchiveAction
92 |       buildConfiguration = "Release"
93 |       revealArchiveInOrganizer = "YES">
94 |    </ArchiveAction>
95 | </Scheme>
96 | 


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 3 |    LastUpgradeVersion = "1220"
 4 |    version = "1.3">
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 6 |       parallelizeBuildables = "YES"
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10 |             buildForTesting = "YES"
11 |             buildForRunning = "YES"
12 |             buildForProfiling = "YES"
13 |             buildForArchiving = "YES"
14 |             buildForAnalyzing = "YES">
15 |             <BuildableReference
16 |                BuildableIdentifier = "primary"
17 |                BlueprintIdentifier = "52D6D9E11BEFFF6E002C0205"
18 |                BuildableName = "Alba.framework"
19 |                BlueprintName = "Alba-watchOS"
20 |                ReferencedContainer = "container:Alba.xcodeproj">
21 |             </BuildableReference>
22 |          </BuildActionEntry>
23 |       </BuildActionEntries>
24 |    </BuildAction>
25 |    <TestAction
26 |       buildConfiguration = "Debug"
27 |       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
28 |       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
29 |       shouldUseLaunchSchemeArgsEnv = "YES">
30 |       <Testables>
31 |       </Testables>
32 |    </TestAction>
33 |    <LaunchAction
34 |       buildConfiguration = "Debug"
35 |       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
36 |       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
37 |       launchStyle = "0"
38 |       useCustomWorkingDirectory = "NO"
39 |       ignoresPersistentStateOnLaunch = "NO"
40 |       debugDocumentVersioning = "YES"
41 |       debugServiceExtension = "internal"
42 |       allowLocationSimulation = "YES">
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44 |          <BuildableReference
45 |             BuildableIdentifier = "primary"
46 |             BlueprintIdentifier = "52D6D9E11BEFFF6E002C0205"
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48 |             BlueprintName = "Alba-watchOS"
49 |             ReferencedContainer = "container:Alba.xcodeproj">
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/Configs/Alba.plist:
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 1 | <?xml version="1.0" encoding="UTF-8"?>
 2 | <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
 3 | <plist version="1.0">
 4 | <dict>
 5 | 	<key>CFBundleDevelopmentRegion</key>
 6 | 	<string>en</string>
 7 | 	<key>CFBundleExecutable</key>
 8 | 	<string>$(EXECUTABLE_NAME)</string>
 9 | 	<key>CFBundleIdentifier</key>
10 | 	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
11 | 	<key>CFBundleInfoDictionaryVersion</key>
12 | 	<string>6.0</string>
13 | 	<key>CFBundleName</key>
14 | 	<string>$(PRODUCT_NAME)</string>
15 | 	<key>CFBundlePackageType</key>
16 | 	<string>FMWK</string>
17 | 	<key>CFBundleShortVersionString</key>
18 | 	<string>1.0</string>
19 | 	<key>CFBundleSignature</key>
20 | 	<string>????</string>
21 | 	<key>CFBundleVersion</key>
22 | 	<string>$(CURRENT_PROJECT_VERSION)</string>
23 | 	<key>NSHumanReadableCopyright</key>
24 | 	<string>Copyright © 2016 Oleg Dreyman. All rights reserved.</string>
25 | 	<key>NSPrincipalClass</key>
26 | 	<string></string>
27 | </dict>
28 | </plist>
29 | 


--------------------------------------------------------------------------------
/Configs/AlbaTests.plist:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="UTF-8"?>
 2 | <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
 3 | <plist version="1.0">
 4 | <dict>
 5 | 	<key>CFBundleDevelopmentRegion</key>
 6 | 	<string>en</string>
 7 | 	<key>CFBundleExecutable</key>
 8 | 	<string>$(EXECUTABLE_NAME)</string>
 9 | 	<key>CFBundleIdentifier</key>
10 | 	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
11 | 	<key>CFBundleInfoDictionaryVersion</key>
12 | 	<string>6.0</string>
13 | 	<key>CFBundleName</key>
14 | 	<string>$(PRODUCT_NAME)</string>
15 | 	<key>CFBundlePackageType</key>
16 | 	<string>BNDL</string>
17 | 	<key>CFBundleShortVersionString</key>
18 | 	<string>1.0</string>
19 | 	<key>CFBundleSignature</key>
20 | 	<string>????</string>
21 | 	<key>CFBundleVersion</key>
22 | 	<string>1</string>
23 | </dict>
24 | </plist>
25 | 


--------------------------------------------------------------------------------
/LICENSE:
--------------------------------------------------------------------------------
 1 | The MIT License (MIT)
 2 | 
 3 | Copyright (c) 2016 Oleg Dreyman
 4 | 
 5 | Permission is hereby granted, free of charge, to any person obtaining a copy
 6 | of this software and associated documentation files (the "Software"), to deal
 7 | in the Software without restriction, including without limitation the rights
 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 9 | copies of the Software, and to permit persons to whom the Software is
10 | furnished to do so, subject to the following conditions:
11 | 
12 | The above copyright notice and this permission notice shall be included in all
13 | copies or substantial portions of the Software.
14 | 
15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 | SOFTWARE.
22 | 
23 | 


--------------------------------------------------------------------------------
/Package.swift:
--------------------------------------------------------------------------------
 1 | // swift-tools-version:5.0
 2 | 
 3 | import PackageDescription
 4 | 
 5 | let package = Package(
 6 |     name: "Alba",
 7 |     platforms: [
 8 |         .macOS(.v10_12), .iOS(.v10), .tvOS(.v10), .watchOS(.v3)
 9 |     ],
10 |     products: [
11 |         .library(name: "Alba", type: .static, targets: ["Alba"])
12 |     ],
13 |     dependencies: [],
14 |     targets: [
15 |         .target(
16 |             name: "Alba",
17 |             dependencies: [],
18 |             path: "Sources"
19 |         ),
20 |         .testTarget(
21 |             name: "AlbaTests",
22 |             dependencies: ["Alba"]
23 |         )
24 |     ]
25 | )
26 | 


--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
  1 | # Alba
  2 | 
  3 | **Alba** is a tiny yet powerful library which allows you to create sophisticated, decoupled and complex architecture using functional-reactive paradigms. **Alba** is designed to work mostly with reference semantics instances (classes).
  4 | 
  5 | ## Usage
  6 | 
  7 | #### Create publisher
  8 | 
  9 | ```swift
 10 | let publisher = Publisher<UUID>()
 11 | publisher.publish(UUID())
 12 | ```
 13 | 
 14 | #### Subscribing
 15 | 
 16 | In order to subscribe, you should use `Subscribe` instances. The easiest way to get them is by using `.proxy` property on publishers:
 17 | 
 18 | ```swift
 19 | final class NumbersPrinter {
 20 |     
 21 |     init(numbersPublisher: Subscribe<Int>) {
 22 |         numbersPublisher.subscribe(self, with: NumbersPrinter.print)
 23 |     }
 24 |     
 25 |     func print(_ uuid: Int) {
 26 |         print(uuid)
 27 |     }
 28 |     
 29 | }
 30 | 
 31 | let printer = NumbersPrinter(numbersPublisher: publisher.proxy)
 32 | publisher.publish(10) // prints "10"
 33 | ```
 34 | 
 35 | If you're surprised by how `NumbersPrinter.print` looks - that's because this allows **Alba** to do some interesting stuff with reference cycles. Check out the [implementation](https://github.com/dreymonde/Alba/blob/master/Sources/Proxy.swift#L52) for details.
 36 | 
 37 | #### That functional things
 38 | 
 39 | The cool thing about publisher proxies is the ability to do interesting things on them, for example, filter and map:
 40 | 
 41 | ```swift
 42 | let stringPublisher = Publisher<String>()
 43 | 
 44 | final class Listener {
 45 |     
 46 |     init(publisher: Subscribe<String>) {
 47 |         publisher
 48 |             .flatMap({ Int($0) })
 49 |             .filter({ $0 > 0 })
 50 |             .subscribe(self, with: Listener.didReceive)
 51 |     }
 52 |     
 53 |     func didReceive(positiveNumber: Int) {
 54 |         print(positiveNumber)
 55 |     }
 56 |     
 57 | }
 58 | 
 59 | let listener = Listener(publisher: stringPublisher.proxy)
 60 | stringPublisher.publish("14aq") // nothing
 61 | stringPublisher.publish("-5")   // nothing
 62 | stringPublisher.publish("15")   // prints "15"
 63 | ```
 64 | 
 65 | Cool, huh?
 66 | 
 67 | #### Lightweight observing
 68 | 
 69 | ```swift
 70 | let publisher = Publisher<Int>()
 71 | publisher.proxy.listen { (number) in
 72 |     print(number)
 73 | }
 74 | publisher.publish(112) // prints "112"
 75 | ```
 76 | 
 77 | Be careful with `listen`. Don't prefer it over `subscribe` as it can introduce memory leaks to your application.
 78 | 
 79 | ### Writing your own `Subscribe` extensions
 80 | 
 81 | If you want to write your own `Subscribe` extensions, you should use `rawModify` method:
 82 | 
 83 | ```swift
 84 | public func rawModify<OtherEvent>(subscribe: (ObjectIdentifier, EventHandler<OtherEvent>) -> (), entry: @autoclosure @escaping ProxyPayload.Entry) -> Subscribe<OtherEvent>
 85 | ```
 86 | 
 87 | Here is, for example, how you can implement `map`:
 88 | 
 89 | ```swift
 90 | public extension Subscribe {
 91 |     
 92 |     public func map<OtherEvent>(_ transform: @escaping (Event) -> OtherEvent) -> Subscribe<OtherEvent> {
 93 |         return rawModify(subscribe: { (identifier, handle) in
 94 |             let handler: EventHandler<Event> = { event in
 95 |                 handle(transform(event))
 96 |             }
 97 |             self._subscribe(identifier, handler)
 98 |         }, entry: .transformation(label: "mapped", .transformed(fromType: Event.self, toType: OtherEvent.self)))
 99 |     }
100 |     
101 | }
102 | ```
103 | 
104 | `entry` here is purely for debugging purposes -- you're describing the intention of your method.
105 | 
106 | ### Inform Bureau
107 | 
108 | One of the main drawbacks of the functional-reactive style is an elevated level of indirection -- you can't easily detect the information flow in your application. **Alba** aims to solve this problem with the help of a handy feature called *Inform Bureau*. Inform Bureau collects information about every subscription and publishing inside your application, so it's easy for you to detect what's actually going on (and to detect any problems easily, of course).
109 | 
110 | #### Enabling Inform Bureau
111 | 
112 | Inform Bureau is an optional feature, so it should be enabled in your code in order to work. It's actually just one line of code -- make sure to put this in your `AppDelegate`'s `init` (`application(_:didFinishLaunchingWithOptions)` is too late):
113 | 
114 | ```swift
115 | Alba.InformBureau.isEnabled = true
116 | ```
117 | 
118 | Just this line will no have any immediate effect -- in order for Inform Bureau to become useful, you should also enable it's `Logger`:
119 | 
120 | ```swift
121 | Alba.InformBureau.Logger.enable()
122 | ```
123 | 
124 | And that's it! Now you're going to see beautiful messages like these in your output:
125 | 
126 | ```
127 | (S) ManagedObjectContextObserver.changes (Publisher<(NSChangeSet, Int)>)
128 | (S) --> mapped from (NSChangeSet, Int) to NSSpecificChangeSet<CleaningPoint>
129 | (S) !-> subscribed by PointsListViewController:4929411136
130 | ```
131 | 
132 | ```
133 | (S) +AppDelegate.applicationWillTerminate (Publisher<UIApplication>)
134 | (S) --> mapped from UIApplication to ()
135 | (S) merged with:
136 | (S)    +AppDelegate.applicationDidEnterBackground (Publisher<UIApplication>)
137 | (S)    --> mapped from UIApplication to ()
138 | (S) !-> subscribed by ContextSaver:6176536960
139 | ```
140 | 
141 | ```
142 | (P) ContextSaver.didSaveContext (Publisher<()>) published ()
143 | ```
144 | 
145 | *Hint*: `(S)` are subscriptions events, and `(P)` are publications.
146 | 
147 | #### Getting your code ready for Inform Bureau
148 | 
149 | Inform Bureau can be enabled with two lines of code. However, in order for it to be useful, there is a little amount of work required from you. First and foremost, you should create all your publishers with descriptive `label`:
150 | 
151 | ```swift
152 | let didFailToSaveImage = Publisher<Error>(label: "ImageSaver.didFailToSaveImage")
153 | ```
154 | 
155 | You should name your publishers using the next convention: `[type_name].[publisher_name]`
156 | 
157 | If your publisher is declared as `static`, then add `+` to the beginning:
158 | 
159 | ```swift
160 | static let applicationWillTerminate = Publisher<UIApplication>(label: "+AppDelegate.applicationWillTerminate")
161 | ```
162 | 
163 | #### OSLogger
164 | 
165 | **Alba**'s Inform Bureau takes full advantage of Apple's latest [Unified Logging][unified-logging-wwdc] system. The support for this system comes via `Alba.OSLogger` object. If you want your app to write **Alba** logs via `os_log`, enable it after enabling `InformBureau`:
166 | 
167 | ```swift
168 | Alba.InformBureau.isEnabled = true
169 | Alba.OSLogger.enable()
170 | ```
171 | 
172 | In order for `os_log` to work, you should also do [this](http://stackoverflow.com/a/40744462/5569590).
173 | 
174 | Now you can see **Alba** logs of your program in a **Console** application.
175 | 
176 | ## Installation
177 | 
178 | **Alba** is available through [Carthage][carthage-url]. To install, just write into your Cartfile:
179 | 
180 | ```ruby
181 | github "dreymonde/Alba" ~> 0.3.3
182 | ```
183 | 
184 | You can also use SwiftPM. Just add to your `Package.swift`:
185 | 
186 | ```swift
187 | import PackageDescription
188 | 
189 | let package = Package(
190 |     dependencies: [
191 |         .Package(url: "https://github.com/dreymonde/Alba.git", majorVersion: 0, minor: 3),
192 |     ]
193 | )
194 | ```
195 | 
196 | ## Contributing
197 | 
198 | **Alba** is in early stage of development and is opened for any ideas. If you want to contribute, you can:
199 | 
200 | - Propose idea/bugfix in issues
201 | - Make a pull request
202 | - Review any other pull request (very appreciated!), since no change to this project is made without a PR.
203 | 
204 | Actually, any help is welcomed! Feel free to contact us, ask questions and propose new ideas. If you don't want to raise a public issue, you can reach me at [dreymonde@me.com](mailto:dreymonde@me.com).
205 | 
206 | [carthage-url]: https://github.com/Carthage/Carthage
207 | [unified-logging-wwdc]: https://developer.apple.com/videos/play/wwdc2016/721/
208 | 


--------------------------------------------------------------------------------
/Sources/Alba.swift:
--------------------------------------------------------------------------------
 1 | /**
 2 |  *  Alba
 3 |  *
 4 |  *  Copyright (c) 2016 Oleg Dreyman. Licensed under the MIT license, as follows:
 5 |  *
 6 |  *  Permission is hereby granted, free of charge, to any person obtaining a copy
 7 |  *  of this software and associated documentation files (the "Software"), to deal
 8 |  *  in the Software without restriction, including without limitation the rights
 9 |  *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 |  *  copies of the Software, and to permit persons to whom the Software is
11 |  *  furnished to do so, subject to the following conditions:
12 |  *
13 |  *  The above copyright notice and this permission notice shall be included in all
14 |  *  copies or substantial portions of the Software.
15 |  *
16 |  *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 |  *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 |  *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 |  *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 |  *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 |  *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
22 |  *  SOFTWARE.
23 |  */
24 | 
25 | // Alba - stateful event observing engine
26 | 
27 | public typealias EventHandler<Event> = (Event) -> ()
28 | 
29 | public protocol SignedProtocol {
30 |     
31 |     associatedtype Wrapped
32 |     
33 |     var value: Wrapped { get set }
34 |     var submittedBy: ObjectIdentifier? { get set }
35 |     
36 |     init(_ signed: Signed<Wrapped>)
37 |     
38 | }
39 | 
40 | public struct Signed<Value> : SignedProtocol {
41 |     public var value: Value
42 |     public var submittedBy: ObjectIdentifier?
43 |     
44 |     public init(_ value: Value, _ submittedBy: ObjectIdentifier?) {
45 |         self.value = value
46 |         self.submittedBy = submittedBy
47 |     }
48 |     
49 |     public func map<T>(_ transform: (Value) -> T) -> Signed<T> {
50 |         return Signed<T>(transform(self.value), self.submittedBy)
51 |     }
52 |     
53 |     public init(_ signed: Signed<Value>) {
54 |         self = signed
55 |     }
56 | }
57 | 
58 | public extension ObjectIdentifier {
59 |     
60 |     func belongsTo(_ object: AnyObject) -> Bool {
61 |         return ObjectIdentifier(object) == self
62 |     }
63 |     
64 | }
65 | 
66 | public extension Optional where Wrapped == ObjectIdentifier {
67 |     
68 |     func belongsTo(_ object: AnyObject) -> Bool {
69 |         if let wrapped = self {
70 |             return ObjectIdentifier(object) == wrapped
71 |         }
72 |         return false
73 |     }
74 |     
75 | }
76 | 


--------------------------------------------------------------------------------
/Sources/InformBureau.swift:
--------------------------------------------------------------------------------
  1 | /**
  2 |  *  Alba
  3 |  *
  4 |  *  Copyright (c) 2016 Oleg Dreyman. Licensed under the MIT license, as follows:
  5 |  *
  6 |  *  Permission is hereby granted, free of charge, to any person obtaining a copy
  7 |  *  of this software and associated documentation files (the "Software"), to deal
  8 |  *  in the Software without restriction, including without limitation the rights
  9 |  *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 10 |  *  copies of the Software, and to permit persons to whom the Software is
 11 |  *  furnished to do so, subject to the following conditions:
 12 |  *
 13 |  *  The above copyright notice and this permission notice shall be included in all
 14 |  *  copies or substantial portions of the Software.
 15 |  *
 16 |  *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 17 |  *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 18 |  *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 19 |  *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 20 |  *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 21 |  *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 22 |  *  SOFTWARE.
 23 |  */
 24 | 
 25 | public protocol InformBureauPayload {
 26 |     
 27 |     associatedtype Entry
 28 |     
 29 |     init(entries: [Entry])
 30 |     
 31 |     var entries: [Entry] { get set }
 32 |     
 33 | }
 34 | 
 35 | public extension InformBureauPayload {
 36 |     
 37 |     func adding(entry: @autoclosure () -> Entry) -> Self {
 38 |         if InformBureau.isEnabled {
 39 |             var updatedEntries = entries
 40 |             updatedEntries.append(entry())
 41 |             return Self(entries: updatedEntries)
 42 |         } else {
 43 |             return .empty
 44 |         }
 45 |     }
 46 |     
 47 |     static var empty: Self {
 48 |         return Self(entries: [])
 49 |     }
 50 |     
 51 | }
 52 | 
 53 | fileprivate final class InformBureauPublisher<Event> : Subscribable {
 54 |     
 55 |     var handlers: [EventHandler<Event>] = []
 56 |     
 57 |     func publish(_ event: Event) {
 58 |         handlers.forEach({ $0(event) })
 59 |     }
 60 |     
 61 |     fileprivate var proxy: Subscribe<Event> {
 62 |         let payload = ProxyPayload.empty.adding(entry: .publisherLabel("Alba.InformBureau", type: InformBureauPublisher<Event>.self))
 63 |         return Subscribe(subscribe: { (_, handler) in self.handlers.append(handler) },
 64 |                               unsubscribe: { _ in },
 65 |                               payload: payload)
 66 |     }
 67 |     
 68 | }
 69 | 
 70 | public final class InformBureau {
 71 |     
 72 |     public typealias SubscriptionLogMessage = ProxyPayload
 73 |     public typealias PublishingLogMessage = PublishingPayload
 74 |     public typealias GeneralWarningLogMessage = String
 75 |     
 76 |     public static var isEnabled = false
 77 |         
 78 |     fileprivate static let subscriptionPublisher = InformBureauPublisher<SubscriptionLogMessage>()
 79 |     public static var didSubscribe: Subscribe<SubscriptionLogMessage> {
 80 |         return subscriptionPublisher.proxy
 81 |     }
 82 |     
 83 |     fileprivate static let publishingPublisher = InformBureauPublisher<PublishingLogMessage>()
 84 |     public static var didPublish: Subscribe<PublishingLogMessage> {
 85 |         return publishingPublisher.proxy
 86 |     }
 87 |     
 88 |     fileprivate static let generalWarningsPublisher = InformBureauPublisher<GeneralWarningLogMessage>()
 89 |     public static var generalWarnings: Subscribe<GeneralWarningLogMessage> {
 90 |         return generalWarningsPublisher.proxy
 91 |     }
 92 |     
 93 |     static func submitSubscription(_ logMessage: SubscriptionLogMessage) {
 94 |         subscriptionPublisher.publish(logMessage)
 95 |     }
 96 |     
 97 |     static func submitPublishing(_ logMessage: PublishingLogMessage) {
 98 |         publishingPublisher.publish(logMessage)
 99 |     }
100 |     
101 |     static func submitGeneralWarning(_ logMessage: GeneralWarningLogMessage) {
102 |         generalWarningsPublisher.publish(logMessage)
103 |     }
104 |     
105 |     public final class Logger {
106 |         
107 |         static let shared = Logger()
108 |         
109 |         private init() { }
110 |         
111 |         public static func enable() {
112 |             if !InformBureau.isEnabled {
113 |                 print("Enabling Alba.InformBureau...")
114 |                 InformBureau.isEnabled = true
115 |             }
116 |             InformBureau.didSubscribe.subscribe(shared, with: Logger.logSubMergeLevelZero)
117 |             InformBureau.didPublish.subscribe(shared, with: Logger.logPub)
118 |             InformBureau.generalWarnings.subscribe(shared, with: Logger.logGeneralWarning)
119 |         }
120 |         
121 |         public static func disable() {
122 |             InformBureau.didSubscribe.manual.unsubscribe(shared)
123 |             InformBureau.didPublish.manual.unsubscribe(shared)
124 |             InformBureau.generalWarnings.manual.unsubscribe(shared)
125 |         }
126 |         
127 |         func logSubMergeLevelZero(_ logMessage: SubscriptionLogMessage) {
128 |             logSub(logMessage)
129 |             print("")
130 |         }
131 |         
132 |         func logSub(_ logMessage: SubscriptionLogMessage, mergeLevel: Int = 0) {
133 |             var mergeInset = ""
134 |             (0 ..< mergeLevel).forEach { (_) in
135 |                 mergeInset += "   "
136 |             }
137 |             let mark = "(S) " + mergeInset
138 |             func mprint(_ item: String) {
139 |                 print(mark + item)
140 |             }
141 |             if mergeLevel == 0 {
142 |                 print("")
143 |             }
144 |             for entry in logMessage.entries {
145 |                 switch entry {
146 |                 case .publisherLabel(let label, let type):
147 |                     mprint("\(label) (\(type))")
148 |                 case .transformation(let label, let transformation):
149 |                     
150 |                     switch transformation {
151 |                     case .sameType:
152 |                         mprint("--> \(label)")
153 |                     case .transformed(let fromType, let toType):
154 |                         mprint("--> \(label) from \(fromType) to \(toType)")
155 |                     }
156 |                 case .custom(let custom):
157 |                     mprint("--> \(custom)")
158 |                 case .merged(let label, let otherPayload):
159 |                     mprint("\(label) with:")
160 |                     logSub(otherPayload, mergeLevel: mergeLevel + 1)
161 |                 case .subscription(let subscription):
162 |                     switch subscription {
163 |                     case .byObject(let identifier, let type):
164 |                         mprint("!-> subscribed by \(type):\(identifier.hashValue)")
165 |                     case .redirection(let label, let type):
166 |                         mprint("!-> redirected to \(label) (\(type))")
167 |                     case .listen(let type):
168 |                         mprint("!-> listened with EventHandler<\(type)>")
169 |                     }
170 |                 }
171 |             }
172 |         }
173 |         
174 |         func logPub(_ logMessage: PublishingLogMessage) {
175 |             let mark = "(P) "
176 |             print("")
177 |             for entry in logMessage.entries {
178 |                 switch entry {
179 |                 case .published(publisherLabel: let publisherLabel, publisherType: let publisherType, event: let event):
180 |                     print(mark + "\(publisherLabel) (\(publisherType)) published \(event)")
181 |                 case .handled(handlerLabel: let handlerLabel):
182 |                     print(mark + "--> handled by \(handlerLabel)")
183 |                 }
184 |             }
185 |         }
186 |         
187 |         func logGeneralWarning(_ logMessage: GeneralWarningLogMessage) {
188 |             print("")
189 |             print("(W) \(logMessage)")
190 |         }
191 |         
192 |     }
193 |     
194 | }
195 | 


--------------------------------------------------------------------------------
/Sources/Listener.swift:
--------------------------------------------------------------------------------
 1 | /**
 2 |  *  Alba
 3 |  *
 4 |  *  Copyright (c) 2016 Oleg Dreyman. Licensed under the MIT license, as follows:
 5 |  *
 6 |  *  Permission is hereby granted, free of charge, to any person obtaining a copy
 7 |  *  of this software and associated documentation files (the "Software"), to deal
 8 |  *  in the Software without restriction, including without limitation the rights
 9 |  *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 |  *  copies of the Software, and to permit persons to whom the Software is
11 |  *  furnished to do so, subject to the following conditions:
12 |  *
13 |  *  The above copyright notice and this permission notice shall be included in all
14 |  *  copies or substantial portions of the Software.
15 |  *
16 |  *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 |  *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 |  *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 |  *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 |  *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 |  *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
22 |  *  SOFTWARE.
23 |  */
24 | 
25 | internal class BasicListener<Event> {
26 |     
27 |     internal let publisher: Subscribe<Event>
28 |     internal let handler: EventHandler<Event>
29 |     
30 |     internal init(subscribingTo publisher: Subscribe<Event>,
31 |                 _ handler: @escaping EventHandler<Event>) {
32 |         self.publisher = publisher
33 |         self.handler = handler
34 |         publisher.manual.subscribe(self, with: handler)
35 |     }
36 |     
37 |     internal init<Pub : PublisherProtocol>(subscribingTo publisher: Pub,
38 |                 _ handler: @escaping EventHandler<Event>) where Pub.Event == Event {
39 |         self.publisher = publisher.proxy
40 |         self.handler = handler
41 |         self.publisher.manual.subscribe(self, with: handler)
42 |     }
43 |     
44 |     deinit {
45 |         publisher.manual.unsubscribe(self)
46 |     }
47 |     
48 | }
49 | 
50 | internal class NotGoingBasicListener<Event> {
51 |     
52 |     let publisher: Subscribe<Event>
53 |     let handler: EventHandler<Event>
54 |     
55 |     init(subscribingTo publisher: Subscribe<Event>,
56 |          _ handler: @escaping EventHandler<Event>) {
57 |         self.publisher = publisher
58 |         self.handler = handler
59 |         publisher.manual.subscribe(self, with: self.handle)
60 |     }
61 |     
62 |     init<Pub : PublisherProtocol>(subscribingTo publisher: Pub,
63 |          _ handler: @escaping EventHandler<Event>) where Pub.Event == Event {
64 |         self.publisher = publisher.proxy
65 |         self.handler = handler
66 |         self.publisher.manual.subscribe(self, with: self.handle)
67 |     }
68 |     
69 |     func handle(_ event: Event) {
70 |         self.handler(event)
71 |     }
72 |     
73 |     deinit {
74 |         publisher.manual.unsubscribe(self)
75 |     }
76 |     
77 | }
78 | 


--------------------------------------------------------------------------------
/Sources/Publisher.swift:
--------------------------------------------------------------------------------
  1 | /**
  2 |  *  Alba
  3 |  *
  4 |  *  Copyright (c) 2016 Oleg Dreyman. Licensed under the MIT license, as follows:
  5 |  *
  6 |  *  Permission is hereby granted, free of charge, to any person obtaining a copy
  7 |  *  of this software and associated documentation files (the "Software"), to deal
  8 |  *  in the Software without restriction, including without limitation the rights
  9 |  *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 10 |  *  copies of the Software, and to permit persons to whom the Software is
 11 |  *  furnished to do so, subject to the following conditions:
 12 |  *
 13 |  *  The above copyright notice and this permission notice shall be included in all
 14 |  *  copies or substantial portions of the Software.
 15 |  *
 16 |  *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 17 |  *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 18 |  *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 19 |  *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 20 |  *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 21 |  *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 22 |  *  SOFTWARE.
 23 |  */
 24 | 
 25 | public protocol Subscribable : AnyObject {
 26 |     
 27 |     associatedtype Event
 28 |     
 29 |     var proxy: Subscribe<Event> { get }
 30 |     
 31 | }
 32 | 
 33 | public protocol PublisherProtocol : Subscribable {
 34 |     
 35 |     var label: String { get }
 36 |     
 37 |     var subscribers: [ObjectIdentifier : EventHandler<Event>] { get set }
 38 |     
 39 |     func publish(_ event: Event)
 40 |     
 41 | }
 42 | 
 43 | public extension PublisherProtocol {
 44 |     
 45 |     var proxy: Subscribe<Event> {
 46 |         fatalError()
 47 |     }
 48 |     
 49 | }
 50 | 
 51 | public extension PublisherProtocol {
 52 |     
 53 |     func publish(_ event: Event) {
 54 |         subscribers.values.forEach({ handle in handle(event) })
 55 |     }
 56 |     
 57 | }
 58 | 
 59 | public class Publisher<Event> : PublisherProtocol {
 60 |     
 61 |     public var subscribers: [ObjectIdentifier : EventHandler<Event>] = [:]
 62 |     
 63 |     public var label: String
 64 |     
 65 |     public init(label: String = "unnamed") {
 66 |         self.proxy = Subscribe.empty()
 67 |         let initialPayload = ProxyPayload.empty.adding(entry: .publisherLabel(label, type: Publisher<Event>.self))
 68 |         self.label = label
 69 |         self.proxy = Subscribe(subscribe: { [weak self] in self?.subscribers[$0] = $1 },
 70 |                                unsubscribe: { [weak self] in self?.subscribers[$0] = nil },
 71 |                                payload: initialPayload)
 72 |     }
 73 |     
 74 |     public private(set) var proxy: Subscribe<Event>
 75 |     
 76 |     public func publish(_ event: Event) {
 77 |         if !InformBureau.isEnabled {
 78 |             subscribers.values.forEach({ handle in handle(event) })
 79 |         } else {
 80 |             let payload = PublishingPayload.empty.adding(entry: .published(publisherLabel: label, publisherType: Publisher<Event>.self, event: event))
 81 |             InformBureau.submitPublishing(payload)
 82 |             subscribers.forEach { identifier, handle in
 83 |                 handle(event)
 84 |             }
 85 |         }
 86 |     }
 87 |     
 88 | }
 89 | 
 90 | public struct PublishingPayload : InformBureauPayload {
 91 |     
 92 |     public enum Entry {
 93 |         case published(publisherLabel: String, publisherType: Any.Type, event: Any)
 94 |         case handled(handlerLabel: String)
 95 |     }
 96 |     
 97 |     public var entries: [Entry]
 98 |     
 99 |     public init(entries: [Entry]) {
100 |         self.entries = entries
101 |     }
102 |     
103 | }
104 | 
105 | public typealias SignedPublisher<Event> = Publisher<Signed<Event>>
106 | 
107 | public extension Publisher where Event : SignedProtocol {
108 |     
109 |     func publish(_ event: Event.Wrapped, submitterIdentifier: ObjectIdentifier?) {
110 |         let signed = Signed<Event.Wrapped>(event, submitterIdentifier)
111 |         self.publish(.init(signed))
112 |     }
113 |     
114 |     func publish(_ event: Event.Wrapped, submittedBy submitter: AnyObject?) {
115 |         publish(event, submitterIdentifier: submitter.map(ObjectIdentifier.init))
116 |     }
117 |     
118 | }
119 | 
120 | extension Publisher where Event == Void {
121 |     
122 |     public func publish() {
123 |         self.publish(())
124 |     }
125 |     
126 | }
127 | 


--------------------------------------------------------------------------------
/Sources/Subscribe.swift:
--------------------------------------------------------------------------------
  1 | /**
  2 |  *  Alba
  3 |  *
  4 |  *  Copyright (c) 2016 Oleg Dreyman. Licensed under the MIT license, as follows:
  5 |  *
  6 |  *  Permission is hereby granted, free of charge, to any person obtaining a copy
  7 |  *  of this software and associated documentation files (the "Software"), to deal
  8 |  *  in the Software without restriction, including without limitation the rights
  9 |  *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 10 |  *  copies of the Software, and to permit persons to whom the Software is
 11 |  *  furnished to do so, subject to the following conditions:
 12 |  *
 13 |  *  The above copyright notice and this permission notice shall be included in all
 14 |  *  copies or substantial portions of the Software.
 15 |  *
 16 |  *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 17 |  *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 18 |  *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 19 |  *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 20 |  *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 21 |  *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 22 |  *  SOFTWARE.
 23 |  */
 24 | 
 25 | @available(*, unavailable, renamed: "Subscribe")
 26 | public typealias PublisherProxy<T> = Subscribe<T>
 27 | 
 28 | public struct ProxyPayload : InformBureauPayload {
 29 |     
 30 |     public enum Entry {
 31 |         
 32 |         public enum Subscription {
 33 |             case byObject(identifier: ObjectIdentifier, ofType: Any.Type)
 34 |             case redirection(to: String, ofType: Any.Type)
 35 |             case listen(eventType: Any.Type)
 36 |         }
 37 |         
 38 |         public enum Transformation {
 39 |             case sameType
 40 |             case transformed(fromType: Any.Type, toType: Any.Type)
 41 |         }
 42 |         
 43 |         public typealias TransformationLabel = String
 44 |         
 45 |         public enum MergeLabel {
 46 |             case merged
 47 |             case custom(String)
 48 |         }
 49 |         
 50 |         case publisherLabel(String, type: Any.Type)
 51 |         case subscription(Subscription)
 52 |         case transformation(label: TransformationLabel, Transformation)
 53 |         case merged(label: MergeLabel, otherPayload: ProxyPayload)
 54 |         case custom(String)
 55 |         
 56 |     }
 57 |     
 58 |     public var entries: [Entry]
 59 |     
 60 |     public init(entries: [Entry]) {
 61 |         self.entries = entries
 62 |     }
 63 |     
 64 | }
 65 | 
 66 | public extension ProxyPayload.Entry {
 67 |     
 68 |     static var filtered: ProxyPayload.Entry {
 69 |         return .transformation(label: "filtered", .sameType)
 70 |     }
 71 |     
 72 |     static func mapped(fromType: Any.Type, toType: Any.Type) -> ProxyPayload.Entry {
 73 |         return .transformation(label: "mapped", .transformed(fromType: fromType, toType: toType))
 74 |     }
 75 |     
 76 |     static var interrupted: ProxyPayload.Entry {
 77 |         return .custom("interrupted")
 78 |     }
 79 |     
 80 |     static let emptyProxyLabel = "WARNING: Empty proxy"
 81 |     
 82 | }
 83 | 
 84 | public struct Subscribe<Event> {
 85 |     
 86 |     fileprivate let _subscribe: (ObjectIdentifier, @escaping EventHandler<Event>) -> ()
 87 |     fileprivate let _unsubscribe: (ObjectIdentifier) -> ()
 88 |     internal let payload: ProxyPayload
 89 |     
 90 |     public init(subscribe: @escaping (ObjectIdentifier, @escaping EventHandler<Event>) -> (),
 91 |                 unsubscribe: @escaping (ObjectIdentifier) -> (),
 92 |                 label: String = "unnnamed") {
 93 |         self._subscribe = subscribe
 94 |         self._unsubscribe = unsubscribe
 95 |         self.payload = ProxyPayload.empty.adding(entry: .publisherLabel(label, type: Subscribe<Event>.self))
 96 |     }
 97 |     
 98 |     public init(subscribe: @escaping (ObjectIdentifier, @escaping EventHandler<Event>) -> (),
 99 |                   unsubscribe: @escaping (ObjectIdentifier) -> (),
100 |                   payload: ProxyPayload) {
101 |         self._subscribe = subscribe
102 |         self._unsubscribe = unsubscribe
103 |         self.payload = payload
104 |     }
105 |     
106 |     public func subscribe<Object : AnyObject>(_ object: Object,
107 |                           with producer: @escaping (Object) -> EventHandler<Event>) {
108 |         let identifier = ObjectIdentifier(object)
109 |         if InformBureau.isEnabled, Object.self != Publisher<Event>.self {
110 |             let entry = ProxyPayload.Entry.subscription(.byObject(identifier: identifier, ofType: Object.self))
111 |             InformBureau.submitSubscription(payload.adding(entry: entry))
112 |         }
113 |         self._subscribe(identifier, { [weak object] in
114 |             if let object = object {
115 |                 producer(object)($0)
116 |             } else {
117 |                 self._unsubscribe(identifier)
118 |             }
119 |         })
120 |     }
121 |     
122 |     public func flatSubscribe<Object : AnyObject>(_ object: Object, with handler: @escaping (Object, Event) -> ()) {
123 |         subscribe(object, with: unfold(handler))
124 |     }
125 |     
126 |     public func rawModify<OtherEvent>(subscribe: @escaping (ObjectIdentifier, @escaping EventHandler<OtherEvent>) -> (),
127 |                              entry: ProxyPayload.Entry) -> Subscribe<OtherEvent> {
128 |         return Subscribe<OtherEvent>(subscribe: subscribe,
129 |                                      unsubscribe: self._unsubscribe,
130 |                                      payload: payload.adding(entry: entry))
131 |     }
132 |     
133 |     public func filter(_ condition: @escaping (Event) -> Bool) -> Subscribe<Event> {
134 |         return rawModify(subscribe: { (identifier, handle) in
135 |             let handler: EventHandler<Event> = { event in
136 |                 if condition(event) { handle(event) }
137 |             }
138 |             self._subscribe(identifier, handler)
139 |         }, entry: .filtered)
140 |     }
141 |     
142 |     public func map<OtherEvent>(_ transform: @escaping (Event) -> OtherEvent) -> Subscribe<OtherEvent> {
143 |         return rawModify(subscribe: { (identifier, handle) in
144 |             let handler: EventHandler<Event> = { event in
145 |                 handle(transform(event))
146 |             }
147 |             self._subscribe(identifier, handler)
148 |         }, entry: .mapped(fromType: Event.self,
149 |                           toType: OtherEvent.self))
150 |     }
151 |     
152 |     public func flatMap<OtherEvent>(_ transform: @escaping (Event) -> OtherEvent?) -> Subscribe<OtherEvent> {
153 |         return rawModify(subscribe: { (identifier, handle) in
154 |             let handler: EventHandler<Event> = { event in
155 |                 if let transformed = transform(event) { handle(transformed) }
156 |             }
157 |             self._subscribe(identifier, handler)
158 |         }, entry: .mapped(fromType: Event.self,
159 |                           toType: OtherEvent.self))
160 |     }
161 |     
162 |     public func interrupted(with work: @escaping (Event) -> ()) -> Subscribe<Event> {
163 |         return rawModify(subscribe: { (identifier, handle) in
164 |             self._subscribe(identifier, { work($0); handle($0) })
165 |         }, entry: .interrupted)
166 |     }
167 |     
168 |     public func merged(with other: Subscribe<Event>) -> Subscribe<Event> {
169 |         return Subscribe<Event>(subscribe: { (identifier, handle) in
170 |             self._subscribe(identifier, handle)
171 |             other._subscribe(identifier, handle)
172 |         }, unsubscribe: { (identifier) in
173 |             self._unsubscribe(identifier)
174 |             other._unsubscribe(identifier)
175 |         }, payload: payload.adding(entry: .merged(label: .merged, otherPayload: other.payload)))
176 |     }
177 |     
178 |     public func redirect<Publisher : PublisherProtocol>(to publisher: Publisher) where Publisher.Event == Event {
179 |         if InformBureau.isEnabled {
180 |             InformBureau.submitSubscription(payload.adding(entry: .subscription(.redirection(to: publisher.label, ofType: Publisher.self))))
181 |         }
182 |         subscribe(publisher, with: Publisher.publish)
183 |     }
184 |     
185 |     public func listen(with handler: @escaping EventHandler<Event>) {
186 |         let listener = NotGoingBasicListener<Event>(subscribingTo: self, handler)
187 |         _silenceWarning(of: listener)
188 |         if InformBureau.isEnabled {
189 |             InformBureau.submitSubscription(payload.adding(entry: .subscription(.listen(eventType:Event.self))))
190 |         }
191 |     }
192 |     
193 |     public func void() -> Subscribe<Void> {
194 |         return map({ _ in })
195 |     }
196 |     
197 |     public var manual: ManualSubscribe<Event> {
198 |         return ManualSubscribe(proxy: self)
199 |     }
200 |     
201 | }
202 | 
203 | extension Subscribe where Event == Void {
204 |     
205 |     public func subscribe<Object : AnyObject>(_ object: Object,
206 |                                               with producer: @escaping (Object) -> () -> ()) {
207 |         self.flatSubscribe(object) { (obj, _) in
208 |             producer(obj)()
209 |         }
210 |     }
211 |     
212 | }
213 | 
214 | public struct ManualSubscribe<Event> {
215 |     
216 |     fileprivate let proxy: Subscribe<Event>
217 |     
218 |     public func subscribe(_ object: AnyObject, with subscription: @escaping EventHandler<Event>) {
219 |         let identifier = ObjectIdentifier(object)
220 |         proxy._subscribe(identifier, subscription)
221 |     }
222 |     
223 |     public func unsubscribe(_ object: AnyObject) {
224 |         let identifier = ObjectIdentifier(object)
225 |         proxy._unsubscribe(identifier)
226 |     }
227 |     
228 |     public func subscribe(objectWith objectIdentifier: ObjectIdentifier,
229 |                           with handler: @escaping EventHandler<Event>) {
230 |         proxy._subscribe(objectIdentifier, handler)
231 |     }
232 |     
233 |     public func unsubscribe(objectWith objectIdentifier: ObjectIdentifier) {
234 |         proxy._unsubscribe(objectIdentifier)
235 |     }
236 |     
237 | }
238 | 
239 | public extension Subscribe where Event : SignedProtocol {
240 |     
241 |     func subscribe<Object : AnyObject>(_ object: Object,
242 |                           with producer: @escaping (Object) -> EventHandler<(Event.Wrapped, submitterIdentifier: ObjectIdentifier?)>) {
243 |         let identifier = ObjectIdentifier(object)
244 |         self._subscribe(identifier, { [weak object] event in
245 |             if let object = object {
246 |                 let handler = producer(object)
247 |                 handler((event.value, event.submittedBy))
248 |             } else {
249 |                 self._unsubscribe(identifier)
250 |             }
251 |         })
252 |     }
253 |     
254 |     func subscribe<Object : AnyObject>(_ object: Object,
255 |                           with producer: @escaping (Object) -> EventHandler<(Event.Wrapped, submittedBySelf: Bool)>) {
256 |         let identifier = ObjectIdentifier(object)
257 |         self._subscribe(identifier, { [weak object] event in
258 |             if let object = object {
259 |                 let handler = producer(object)
260 |                 handler((event.value, event.submittedBy == identifier))
261 |             } else {
262 |                 self._unsubscribe(identifier)
263 |             }
264 |         })
265 |     }
266 |     
267 |     func filterValue(_ condition: @escaping (Event.Wrapped) -> Bool) -> Subscribe<Event> {
268 |         return filter({ condition($0.value) })
269 |     }
270 |     
271 |     func drop<Object : AnyObject>(eventsSignedBy signer: Object) -> Subscribe<Event> {
272 |         return weak(signer).filter({ (object) in
273 |             return { (event) in
274 |                 !event.submittedBy.belongsTo(object)
275 |             }
276 |         }).proxy
277 |     }
278 |     
279 |     func mapValue<OtherEvent>(_ transform: @escaping (Event.Wrapped) -> OtherEvent) -> Subscribe<Signed<OtherEvent>> {
280 |         return map({ (event) in
281 |             let transformed = transform(event.value)
282 |             let signed = Signed.init(transformed, event.submittedBy)
283 |             return signed
284 |         })
285 |     }
286 |     
287 |     func flatMapValue<OtherEvent>(_ transform: @escaping (Event.Wrapped) -> OtherEvent?) -> Subscribe<Signed<OtherEvent>> {
288 |         return flatMap({ (event) in
289 |             let transformed = transform(event.value)
290 |             let signed = transformed.map({ Signed.init($0, event.submittedBy) })
291 |             return signed
292 |         })
293 |     }
294 |     
295 |     var unsigned: Subscribe<Event.Wrapped> {
296 |         return self.map({ $0.value })
297 |     }
298 |     
299 | }
300 | 
301 | public extension Subscribe {
302 |     
303 |     static func empty() -> Subscribe<Event> {
304 |         let payload = ProxyPayload.empty.adding(entry: .publisherLabel(ProxyPayload.Entry.emptyProxyLabel, type: Subscribe<Event>.self))
305 |         return Subscribe<Event>(subscribe: { _,_  in },
306 |                                      unsubscribe: { _ in },
307 |                                      payload: payload)
308 |     }
309 |     
310 | }
311 | 
312 | public extension Subscribe {
313 |     
314 |     func weak<Object : AnyObject>(_ object: Object) -> WeakSubscribe<Object, Event> {
315 |         return WeakSubscribe(proxy: self, object: object)
316 |     }
317 |     
318 | }
319 | 
320 | public typealias SignedSubscribe<Event> = Subscribe<Signed<Event>>
321 | 
322 | fileprivate func _silenceWarning(of unused: Any) {
323 |     
324 | }
325 | 


--------------------------------------------------------------------------------
/Sources/WeakSubscribe.swift:
--------------------------------------------------------------------------------
  1 | /**
  2 |  *  Alba
  3 |  *
  4 |  *  Copyright (c) 2016 Oleg Dreyman. Licensed under the MIT license, as follows:
  5 |  *
  6 |  *  Permission is hereby granted, free of charge, to any person obtaining a copy
  7 |  *  of this software and associated documentation files (the "Software"), to deal
  8 |  *  in the Software without restriction, including without limitation the rights
  9 |  *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 10 |  *  copies of the Software, and to permit persons to whom the Software is
 11 |  *  furnished to do so, subject to the following conditions:
 12 |  *
 13 |  *  The above copyright notice and this permission notice shall be included in all
 14 |  *  copies or substantial portions of the Software.
 15 |  *
 16 |  *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 17 |  *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 18 |  *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 19 |  *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 20 |  *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 21 |  *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 22 |  *  SOFTWARE.
 23 |  */
 24 | 
 25 | public struct WeakSubscribe<Object : AnyObject, Event> {
 26 |     
 27 |     public let proxy: Subscribe<Event>
 28 |     fileprivate let object: Object
 29 |     
 30 |     public init(proxy: Subscribe<Event>,
 31 |                 object: Object) {
 32 |         self.proxy = proxy
 33 |         self.object = object
 34 |     }
 35 |         
 36 |     public func rawModify<OtherEvent>(subscribe: @escaping (Object, ObjectIdentifier, @escaping EventHandler<OtherEvent>) -> (), entry: ProxyPayload.Entry) -> WeakSubscribe<Object, OtherEvent> {
 37 |         let selfproxy = self.proxy
 38 |         let newProxy: Subscribe<OtherEvent> = selfproxy.rawModify(subscribe: { [weak object] (identifier, handle) in
 39 |             if let objecta = object {
 40 |                 subscribe(objecta, identifier, handle)
 41 |             } else {
 42 |                 selfproxy.manual.unsubscribe(objectWith: identifier)
 43 |             }
 44 |         }, entry: entry)
 45 |         return WeakSubscribe<Object, OtherEvent>(proxy: newProxy, object: object)
 46 |     }
 47 |     
 48 |     public func filter(_ condition: @escaping (Object) -> (Event) -> Bool) -> WeakSubscribe<Object, Event> {
 49 |         let sproxy = self.proxy
 50 |         return rawModify(subscribe: { (object, identifier, handle) in
 51 |             let handler: EventHandler<Event> = { [weak object] event in
 52 |                 if let object = object {
 53 |                     if condition(object)(event) { handle(event) }
 54 |                 } else {
 55 |                     sproxy.manual.unsubscribe(objectWith: identifier)
 56 |                 }
 57 |             }
 58 |             sproxy.manual.subscribe(objectWith: identifier, with: handler)
 59 |         }, entry: .filtered)
 60 |     }
 61 |     
 62 |     public func map<OtherEvent>(_ transform: @escaping (Object) -> (Event) -> (OtherEvent)) -> WeakSubscribe<Object, OtherEvent> {
 63 |         let selfproxy = proxy
 64 |         return rawModify(subscribe: { (object, identifier, handle) in
 65 |             let handler: EventHandler<Event> = { [weak object] event in
 66 |                 if let objecta = object {
 67 |                     handle(transform(objecta)(event))
 68 |                 } else {
 69 |                     selfproxy.manual.unsubscribe(objectWith: identifier)
 70 |                 }
 71 |             }
 72 |             selfproxy.manual.subscribe(objectWith: identifier, with: handler)
 73 |         }, entry: .mapped(fromType: Event.self, toType: OtherEvent.self))
 74 |     }
 75 |     
 76 |     public func flatMap<OtherEvent>(_ transform: @escaping (Object) -> (Event) -> (OtherEvent?)) -> WeakSubscribe<Object, OtherEvent> {
 77 |         let selfproxy = proxy
 78 |         return rawModify(subscribe: { (object, identifier, handle) in
 79 |             let handler: EventHandler<Event> = { [weak object] event in
 80 |                 if let objecta = object {
 81 |                     if let transformed = transform(objecta)(event) {
 82 |                         handle(transformed)
 83 |                     }
 84 |                 } else {
 85 |                     selfproxy.manual.unsubscribe(objectWith: identifier)
 86 |                 }
 87 |             }
 88 |             selfproxy.manual.subscribe(objectWith: identifier, with: handler)
 89 |         }, entry: .mapped(fromType: Event.self, toType: OtherEvent.self))
 90 |     }
 91 |     
 92 |     public func subscribe(with producer: @escaping (Object) -> EventHandler<Event>) {
 93 |         proxy.subscribe(object, with: producer)
 94 |     }
 95 |         
 96 |     public var flat: FlatWeakSubscribe<Object, Event> {
 97 |         return FlatWeakSubscribe(weakProxy: self)
 98 |     }
 99 |     
100 | }
101 | 
102 | public struct FlatWeakSubscribe<Object : AnyObject, Event> {
103 |     
104 |     public let weakProxy: WeakSubscribe<Object, Event>
105 |     
106 |     public init(weakProxy: WeakSubscribe<Object, Event>) {
107 |         self.weakProxy = weakProxy
108 |     }
109 |     
110 |     public var proxy: Subscribe<Event> {
111 |         return weakProxy.proxy
112 |     }
113 |     
114 |     public func filter(_ condition: @escaping (Object, Event) -> Bool) -> FlatWeakSubscribe<Object, Event> {
115 |         return weakProxy.filter(unfold(condition)).flat
116 |     }
117 |     
118 |     public func map<OtherEvent>(_ transform: @escaping (Object, Event) -> OtherEvent) -> FlatWeakSubscribe<Object, OtherEvent> {
119 |         return weakProxy.map(unfold(transform)).flat
120 |     }
121 |     
122 |     public func flatMap<OtherEvent>(_ transform: @escaping (Object, Event) -> OtherEvent?) -> FlatWeakSubscribe<Object, OtherEvent> {
123 |         return weakProxy.flatMap(unfold(transform)).flat
124 |     }
125 |     
126 |     public func subscribe(with handler: @escaping (Object, Event) -> ()) {
127 |         weakProxy.subscribe(with: unfold(handler))
128 |     }
129 |     
130 | }
131 | 
132 | internal func unfold<First, Second, Output>(_ function: @escaping (First, Second) -> Output) -> (First) -> (Second) -> Output {
133 |     return { first in
134 |         return { second in
135 |             return function(first, second)
136 |         }
137 |     }
138 | }
139 | 
140 | public prefix func ! <T>(boolFunc: @escaping (T) -> Bool) -> ((T) -> Bool) {
141 |     return {
142 |         return !boolFunc($0)
143 |     }
144 | }
145 | 


--------------------------------------------------------------------------------
/Tests/AlbaTests/AlbaTests.swift:
--------------------------------------------------------------------------------
  1 | /**
  2 |  *  Alba
  3 |  *
  4 |  *  Copyright (c) 2016 Oleg Dreyman. Licensed under the MIT license, as follows:
  5 |  *
  6 |  *  Permission is hereby granted, free of charge, to any person obtaining a copy
  7 |  *  of this software and associated documentation files (the "Software"), to deal
  8 |  *  in the Software without restriction, including without limitation the rights
  9 |  *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 10 |  *  copies of the Software, and to permit persons to whom the Software is
 11 |  *  furnished to do so, subject to the following conditions:
 12 |  *
 13 |  *  The above copyright notice and this permission notice shall be included in all
 14 |  *  copies or substantial portions of the Software.
 15 |  *
 16 |  *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 17 |  *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 18 |  *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 19 |  *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 20 |  *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 21 |  *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 22 |  *  SOFTWARE.
 23 |  */
 24 | 
 25 | import Foundation
 26 | import XCTest
 27 | @testable import Alba
 28 | 
 29 | var isBureauWorking = false
 30 | 
 31 | class AlbaTests: XCTestCase {
 32 |     
 33 |     override func setUp() {
 34 |         if !isBureauWorking {
 35 |             print("Alba Inform Bureau on")
 36 |             Alba.InformBureau.isEnabled = true
 37 |             Alba.InformBureau.Logger.enable()
 38 | //            Alba.InformBureau.didPublish.listen(with: { print($0) })
 39 |             isBureauWorking = true
 40 |             print("Now working")
 41 |         }
 42 |     }
 43 |     
 44 |     func testSimplest() {
 45 |         let pub = Publisher<Int>(label: "testSimplest.pub")
 46 |         let expectation = self.expectation(description: "On Sub")
 47 |         pub.proxy.listen { (number) in
 48 |             XCTAssertEqual(number, 5)
 49 |             expectation.fulfill()
 50 |         }
 51 |         pub.publish(5)
 52 |         waitForExpectations(timeout: 5.0)
 53 |     }
 54 |     
 55 |     class SignedThing {
 56 |         
 57 |         var expectation: XCTestExpectation
 58 |         
 59 |         init(expectation: XCTestExpectation) {
 60 |             self.expectation = expectation
 61 |         }
 62 |         
 63 |         func handle(_ a: (number: Int, submittedBySelf: Bool)) {
 64 |             if a.submittedBySelf {
 65 |                 if a.number == 7 {
 66 |                     XCTFail()
 67 |                 }
 68 |             } else {
 69 |                 if a.number == 5 {
 70 |                     XCTFail()
 71 |                 }
 72 |                 if a.number == 7 {
 73 |                     expectation.fulfill()
 74 |                 }
 75 |             }
 76 |         }
 77 |         
 78 |         func handle_filtered(_ number: Int) {
 79 |             if number == 10 {
 80 |                 XCTFail()
 81 |             } else if number == 5 {
 82 |                 expectation.fulfill()
 83 |             }
 84 |         }
 85 |         
 86 |     }
 87 |     
 88 |     func testSigned() {
 89 |         let pub = SignedPublisher<Int>()
 90 |         let expectation = self.expectation(description: "On sub")
 91 |         let sub = SignedThing(expectation: expectation)
 92 |         pub.proxy.subscribe(sub, with: SignedThing.handle)
 93 |         pub.publish(5, submittedBy: sub)
 94 |         pub.publish(7, submittedBy: nil)
 95 |         waitForExpectations(timeout: 5.0)
 96 |     }
 97 |     
 98 |     func testFilterSigned() {
 99 |         let pub = SignedPublisher<Int>()
100 |         let expectation = self.expectation(description: "on sub")
101 |         let sub = SignedThing(expectation: expectation)
102 |         pub.proxy.drop(eventsSignedBy: sub).unsigned.subscribe(sub, with: SignedThing.handle_filtered)
103 |         pub.publish(10, submittedBy: sub)
104 |         pub.publish(5, submittedBy: nil)
105 |         waitForExpectations(timeout: 5.0)
106 |     }
107 |     
108 |     class SignedThing2 {
109 |         
110 |         var expectation: XCTestExpectation
111 |         
112 |         init(expectation: XCTestExpectation) {
113 |             self.expectation = expectation
114 |         }
115 |         
116 |         func handle(a: (number: Int, identifier: ObjectIdentifier?)) {
117 |             if a.identifier?.belongsTo(self) == true {
118 |                 if a.number == 7 {
119 |                     XCTFail()
120 |                 }
121 |             } else {
122 |                 if a.number == 5 {
123 |                     XCTFail()
124 |                 }
125 |                 if a.number == 7 {
126 |                     expectation.fulfill()
127 |                 }
128 |             }
129 |         }
130 |         
131 |     }
132 |     
133 |     func testSigned2() {
134 |         let pub = SignedPublisher<Int>()
135 |         let expectation = self.expectation(description: "On sub")
136 |         let sub = SignedThing2(expectation: expectation)
137 |         pub.proxy.subscribe(sub, with: SignedThing2.handle)
138 |         pub.publish(5, submittedBy: sub)
139 |         pub.publish(7, submittedBy: nil)
140 |         waitForExpectations(timeout: 5.0)
141 |     }
142 |     
143 |     class DEA {
144 |         let proxy: Subscribe<Int>
145 |         let sproxy: SignedSubscribe<Int>
146 |         let deinitBlock: () -> ()
147 |         init(proxy: Subscribe<Int>, sproxy: SignedSubscribe<Int>, signed: Bool = false, deinitBlock: @escaping () -> ()) {
148 |             self.proxy = proxy
149 |             self.sproxy = sproxy
150 |             self.deinitBlock = deinitBlock
151 |             proxy.subscribe(self, with: DEA.handle)
152 |             if signed {
153 |                 sproxy.subscribe(self, with: DEA.handleSigned)
154 |             } else {
155 |                 sproxy.unsigned.subscribe(self, with: DEA.handle)
156 |             }
157 |         }
158 |         deinit {
159 |             print("Dealloc")
160 |             deinitBlock()
161 |         }
162 |         func handle(_ int: Int) {
163 |             print(int)
164 |             XCTAssertNotEqual(int, 10)
165 |         }
166 |         func handleSigned(a: (int: Int, submitter: ObjectIdentifier?)) {
167 |             print(a.int)
168 |             XCTAssertNotEqual(a.int, 10)
169 |         }
170 |     }
171 |     
172 |     func testDealloc() {
173 |         let pub = Publisher<Int>()
174 |         let spub = SignedPublisher<Int>()
175 |         let expectation = self.expectation(description: "Deinit wait")
176 |         var dea: DEA? = DEA.init(proxy: pub.proxy, sproxy: spub.proxy, deinitBlock: { expectation.fulfill() })
177 |         print(dea!)
178 |         pub.publish(5)
179 |         spub.publish(5, submittedBy: nil)
180 |         dea = nil
181 |         pub.publish(10)
182 |         spub.publish(10, submittedBy: nil)
183 |         waitForExpectations(timeout: 5.0)
184 |     }
185 |     
186 |     func testDealloc2() {
187 |         let pub = Publisher<Int>()
188 |         let spub = SignedPublisher<Int>()
189 |         let expectation = self.expectation(description: "Deinit wait")
190 |         var dea: DEA? = DEA.init(proxy: pub.proxy, sproxy: spub.proxy, signed: true, deinitBlock: { expectation.fulfill() })
191 |         print(dea!)
192 |         pub.publish(5)
193 |         spub.publish(5, submittedBy: nil)
194 |         dea = nil
195 |         pub.publish(10)
196 |         spub.publish(10, submittedBy: nil)
197 |         waitForExpectations(timeout: 5.0)
198 |     }
199 |     
200 |     func testFilter() {
201 |         let pub = Publisher<Int>()
202 |         let pospub = pub.proxy.filter({ $0 > 0 })
203 |         let expectation = self.expectation(description: "on sub")
204 |         pospub.listen { (number) in
205 |             XCTAssertGreaterThan(number, 0)
206 |             if number == 10 { expectation.fulfill() }
207 |         }
208 |         [-1, -3, 5, 7, 9, 4, 3, -2, 0, 10].forEach(pub.publish)
209 |         waitForExpectations(timeout: 5.0)
210 |     }
211 |     
212 |     func testMap() {
213 |         let pub = Publisher<Int>()
214 |         let strpub = pub.proxy.map(String.init)
215 |         let expectation = self.expectation(description: "onsub")
216 |         strpub.listen { (string) in
217 |             debugPrint(string)
218 |             if string == "10" { expectation.fulfill() }
219 |         }
220 |         [-1, 2, 3, 9, 7, 4, 2, 57, 10].forEach(pub.publish)
221 |         waitForExpectations(timeout: 5.0)
222 |     }
223 |     
224 |     func testFlatMap() {
225 |         let pub = Publisher<String>()
226 |         let intpub = pub.proxy.flatMap({ Int($0) })
227 |         let expectation = self.expectation(description: "onsub")
228 |         intpub.listen { (number) in
229 |             if number == 10 { expectation.fulfill() }
230 |         }
231 |         ["Abba", "Babbaa", "-7", "3", "10"].forEach(pub.publish)
232 |         waitForExpectations(timeout: 5.0)
233 |     }
234 |     
235 |     func testRedirect() {
236 |         let pubOne = Publisher<Int>()
237 |         let pubTwo = Publisher<String>(label: "testRedirect.pubTwo")
238 |         let expectation = self.expectation(description: "onsubtwo")
239 |         pubOne.proxy
240 |             .map({ $0 - 1 })
241 |             .map(String.init)
242 |             .redirect(to: pubTwo)
243 |         pubTwo.proxy.listen { (number) in
244 |             debugPrint(number)
245 |             if number == "10" { expectation.fulfill() }
246 |         }
247 |         pubOne.publish(3)
248 |         pubOne.publish(5)
249 |         pubOne.publish(11)
250 |         waitForExpectations(timeout: 5.0)
251 |     }
252 |     
253 |     func testIntercept() {
254 |         let pub = Publisher<Int>()
255 |         let expectation = self.expectation(description: "onsub")
256 |         let proxy = pub.proxy
257 |             .interrupted(with: {
258 |                 if $0 == 10 { expectation.fulfill() }
259 |             })
260 |         proxy.listen { (_) in
261 |             print("Yay")
262 |         }
263 |         pub.publish(5)
264 |         pub.publish(7)
265 |         pub.publish(10)
266 |         waitForExpectations(timeout: 5.0)
267 |     }
268 |     
269 |     func testListen() {
270 |         let pub = Publisher<Int>()
271 |         let expectation = self.expectation(description: "onlis")
272 |         pub.proxy.listen { (number) in
273 |             if number == 10 { expectation.fulfill() }
274 |         }
275 |         [0, 3, 4, -1, 5, 10].forEach(pub.publish)
276 |         waitForExpectations(timeout: 5.0)
277 |     }
278 |     
279 |     func testMapValue() {
280 | //        let signed = SignedPublisher<Int>()
281 | //        let strsgn = signed.proxy.mod_mapValue(String.init)
282 |     }
283 |     
284 |     class Hand {
285 |         
286 |         func handle(_ int: Int) {
287 |             print(int)
288 |         }
289 |         
290 |     }
291 |     
292 |     func testBureau() {
293 |         let hand = Hand()
294 |         let publisher = Publisher<String>(label: "Then-What")
295 |         publisher.proxy
296 |             .flatMap({ Int.init($0) })
297 |             .subscribe(hand, with: Hand.handle)
298 |     }
299 |     
300 |     func testWarning() {
301 |         let proxy = Subscribe<Int>.empty()
302 |         let obj = Hand()
303 |         let expectation = self.expectation(description: "on warning")
304 |         Alba.InformBureau.didSubscribe
305 |             .flatMap({ $0.entries.first })
306 |             .listen { (logEntry) in
307 |                 if case .publisherLabel(let name, _) = logEntry, name == "WARNING: Empty proxy" {
308 |                     expectation.fulfill()
309 |                 }
310 |         }
311 |         proxy.subscribe(obj, with: Hand.handle)
312 |         waitForExpectations(timeout: 5.0)
313 |     }
314 |     
315 |     func testMerged() {
316 |         let first = Publisher<Int>(label: "testMerged.first")
317 |         let second = Publisher<Int>(label: "testMerged.second")
318 |         let merged = first.proxy.merged(with: second.proxy)
319 |         
320 |         let expectation = self.expectation(description: "on merged")
321 |         var is5Present = false
322 |         merged.listen { (number) in
323 |             if number == 5 {
324 |                 is5Present = true
325 |             }
326 |             if number == 10 {
327 |                 XCTAssertTrue(is5Present)
328 |                 expectation.fulfill()
329 |             }
330 |         }
331 |         first.publish(5)
332 |         second.publish(10)
333 |         waitForExpectations(timeout: 5.0, handler: nil)
334 |     }
335 |     
336 |     class Filter {
337 |         
338 |         var numbers = [1, 2, 3, 4, 5]
339 |         
340 |         func subscribe(to publisher: Subscribe<String>) {
341 |             publisher
342 |                 .weak(self)
343 |                 .map({ $0.fromString })
344 |                 .filter({ !$0.numbers.contains })
345 |                 .subscribe(with: Filter.printNonExisting)
346 |         }
347 |         
348 |         func printNonExisting(_ number: Int) {
349 |             if number == 15 {
350 |                 XCTFail("Filter should be deallocated at this point")
351 |             }
352 |             if numbers.contains(number) {
353 |                 XCTFail("Where is actual filtering?")
354 |             }
355 |             print(number)
356 |         }
357 |         
358 |         func fromString(_ string: String) -> Int {
359 |             return Int(string)!
360 |         }
361 |         
362 |         deinit {
363 |             print("Deinit!")
364 |         }
365 |         
366 |     }
367 |     
368 |     func testWeak() {
369 |         let publisher = Publisher<String>(label: "testWeakFilter.publisher")
370 |         var filter: Filter? = Filter()
371 |         filter!.subscribe(to: publisher.proxy)
372 |         [1, 2, 3, 10, 12].map(String.init).forEach(publisher.publish)
373 |         filter = nil
374 |         publisher.publish("15")
375 |     }
376 |     
377 |     class VoidTest {
378 |         
379 |         var tested = false
380 |         
381 |         init() { }
382 |         
383 |         func sub(sub: Subscribe<Void>) {
384 |             sub.subscribe(self, with: VoidTest.test)
385 |         }
386 |         
387 |         func test() {
388 |             tested = true
389 |         }
390 |         
391 |     }
392 |     
393 |     func testVoid() {
394 |         let pub = Publisher<Void>()
395 |         let voidTest = VoidTest()
396 |         voidTest.sub(sub: pub.proxy)
397 |         pub.publish()
398 |         XCTAssertTrue(voidTest.tested)
399 |     }
400 |     
401 | }
402 | 


--------------------------------------------------------------------------------