Chatto inception

.travis.yml

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+language: objective-c
+osx_image: xcode7.1
+
+script:
+- xcodebuild clean build test -project ./Chatto/Chatto.xcodeproj -scheme Chatto -sdk iphonesimulator -configuration Debug | xcpretty; (curl -s https://codecov.io/bash) | bash
+- rm -rf ~/Library/Developer/Xcode/DerivedData
+- xcodebuild clean build test -project ./ChattoAdditions/ChattoAdditions.xcodeproj -scheme ChattoAdditions -sdk iphonesimulator -configuration Debug | xcpretty; (curl -s https://codecov.io/bash) | bash

AUTHORS

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+# Names should be added to this file like so:
+# Name or Organization <email address>
+
+Diego Sánchez <[email protected]>
+Anton Schukin <[email protected]>
+
+&yet LLC
+Badoo

Chatto.podspec

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+Pod::Spec.new do |s|
+  s.name         = "Chatto"
+  s.version      = "1.0.0"
+  s.summary      = "Chat framework in Swift"
+  s.description  = <<-DESC
+                   Lightweight chat framework to build Chat apps
+                   DESC
+  s.homepage     = "https://github.com/badoo/Chatto"
+  s.license      = { :type => "MIT"}
+  s.platform     = :ios, "8.0"
+  s.source       = { :git => "https://github.com/badoo/Chatto.git", :tag => s.version.to_s }
+  s.source_files = "Chatto/Source/**/*.{h,m,swift}"
+  s.public_header_files = "Chatto/Source/**/*.h"
+  s.requires_arc = true
+  s.resources = ["Chatto/Source/**/*.xib", "Chatto/Source/**/*.storyboard", "Chatto/Source/**/*.xcassets"]
+end

Chatto/.swiftlint.yml

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+disabled_rules: # rule identifiers to exclude from running
+  - file_length
+  - force_cast
+  - function_body_length
+  - line_length
+  - todo
+  - type_body_length
+  - variable_name
+included: # paths to include during linting. `--path` is ignored if present. takes precendence over `excluded`.
+  - Source
+excluded: # paths to ignore during linting. overridden by `included`.

Chatto/Chatto.xcodeproj/xcshareddata/xcschemes/Chatto.xcscheme

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+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "0720"
+   version = "1.3">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES">
+      <BuildActionEntries>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "C32BB71F1BE0504D0069EC50"
+               BuildableName = "Chatto.framework"
+               BlueprintName = "Chatto"
+               ReferencedContainer = "container:Chatto.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
+      </BuildActionEntries>
+   </BuildAction>
+   <TestAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      codeCoverageEnabled = "YES">
+      <Testables>
+         <TestableReference
+            skipped = "NO">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "C32BB7291BE0504D0069EC50"
+               BuildableName = "ChattoTests.xctest"
+               BlueprintName = "ChattoTests"
+               ReferencedContainer = "container:Chatto.xcodeproj">
+            </BuildableReference>
+         </TestableReference>
+      </Testables>
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "C32BB71F1BE0504D0069EC50"
+            BuildableName = "Chatto.framework"
+            BlueprintName = "Chatto"
+            ReferencedContainer = "container:Chatto.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
+      <AdditionalOptions>
+      </AdditionalOptions>
+   </TestAction>
+   <LaunchAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      debugServiceExtension = "internal"
+      allowLocationSimulation = "YES">
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "C32BB71F1BE0504D0069EC50"
+            BuildableName = "Chatto.framework"
+            BlueprintName = "Chatto"
+            ReferencedContainer = "container:Chatto.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
+      <AdditionalOptions>
+      </AdditionalOptions>
+   </LaunchAction>
+   <ProfileAction
+      buildConfiguration = "Release"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      debugDocumentVersioning = "YES">
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "C32BB71F1BE0504D0069EC50"
+            BuildableName = "Chatto.framework"
+            BlueprintName = "Chatto"
+            ReferencedContainer = "container:Chatto.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>

Chatto/Source/Chat Items/BaseChatItemPresenter.swift

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+/*
+ The MIT License (MIT)
+
+ Copyright (c) 2015-present Badoo Trading Limited.
+
+ Permission is hereby granted, free of charge, to any person obtaining a copy
+ of this software and associated documentation files (the "Software"), to deal
+ in the Software without restriction, including without limitation the rights
+ to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ copies of the Software, and to permit persons to whom the Software is
+ furnished to do so, subject to the following conditions:
+
+ The above copyright notice and this permission notice shall be included in
+ all copies or substantial portions of the Software.
+
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ THE SOFTWARE.
+*/
+
+import UIKit
+
+public enum ChatItemVisibility {
+    case Hidden
+    case Appearing
+    case Visible
+}
+
+public class BaseChatItemPresenter<CellT: UICollectionViewCell>: ChatItemPresenterProtocol {
+    public final weak var cell: CellT?
+
+    public init() { }
+
+    public class func registerCells(collectionView: UICollectionView) {
+        assert(false, "Implement in subclass")
+    }
+
+    public var canCalculateHeightInBackground: Bool {
+        return false
+    }
+
+    public func heightForCell(maximumWidth width: CGFloat, decorationAttributes: ChatItemDecorationAttributesProtocol?) -> CGFloat {
+        assert(false, "Implement in subclass")
+        return 0
+    }
+
+    public func dequeueCell(collectionView collectionView: UICollectionView, indexPath: NSIndexPath) -> UICollectionViewCell {
+        assert(false, "Implemenent in subclass")
+        return UICollectionViewCell()
+    }
+
+    public func configureCell(cell: UICollectionViewCell, decorationAttributes: ChatItemDecorationAttributesProtocol?) {
+        assert(false, "Implemenent in subclass")
+    }
+
+    final public private(set) var itemVisibility: ChatItemVisibility = .Hidden
+
+    // Need to override default implementatios. Otherwise subclasses's code won't be executed
+    // http://stackoverflow.com/questions/31795158/swift-2-protocol-extension-not-calling-overriden-method-correctly
+    public final func cellWillBeShown(cell: UICollectionViewCell) {
+        if let cell = cell as? CellT {
+            self.cell = cell
+            self.itemVisibility = .Appearing
+            self.cellWillBeShown()
+            self.itemVisibility = .Visible
+        } else {
+            assert(false, "Invalid cell was given to presenter!")
+        }
+    }
+
+    public func cellWillBeShown() {
+        // Hook for subclasses
+    }
+
+    public func shouldShowMenu() -> Bool {
+        return false
+    }
+
+    public final func cellWasHidden(cell: UICollectionViewCell) {
+        // Carefull!! This doesn't mean that this is no longer visible
+        // If cell is replaced (due to a reload for instance) we can have the following sequence:
+        //   - New cell is taken from the pool and configured. We'll get cellWillBeShown
+        //   - Old cell is removed. We'll get cellWasHidden
+        // --> We need to check that this cell is the last one made visible
+        if let cell = cell as? CellT {
+            if cell === self.cell {
+                self.cell = nil
+                self.itemVisibility = .Hidden
+                self.cellWasHidden()
+            }
+        } else {
+            assert(false, "Invalid cell was given to presenter!")
+        }
+    }
+
+    public func cellWasHidden() {
+        // Hook for subclasses. Here we are not visible for real.
+    }
+
+    public func canPerformMenuControllerAction(action: Selector) -> Bool {
+        return false
+    }
+
+    public func performMenuControllerAction(action: Selector) {
+        assert(self.canPerformMenuControllerAction(action))
+    }
+}

Chatto/Source/Chat Items/ChatItemProtocolDefinitions.swift

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+/*
+ The MIT License (MIT)
+
+ Copyright (c) 2015-present Badoo Trading Limited.
+
+ Permission is hereby granted, free of charge, to any person obtaining a copy
+ of this software and associated documentation files (the "Software"), to deal
+ in the Software without restriction, including without limitation the rights
+ to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ copies of the Software, and to permit persons to whom the Software is
+ furnished to do so, subject to the following conditions:
+
+ The above copyright notice and this permission notice shall be included in
+ all copies or substantial portions of the Software.
+
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ THE SOFTWARE.
+*/
+
+import Foundation
+
+public typealias ChatItemType = String
+
+public protocol ChatItemProtocol: class, UniqueIdentificable {
+    var type: ChatItemType { get }
+}
+
+public protocol ChatItemDecorationAttributesProtocol {
+    var bottomMargin: CGFloat { get }
+}
+
+public protocol ChatItemPresenterProtocol: class {
+    static func registerCells(collectionView: UICollectionView)
+    var canCalculateHeightInBackground: Bool { get } // Default is false
+    func heightForCell(maximumWidth width: CGFloat, decorationAttributes: ChatItemDecorationAttributesProtocol?) -> CGFloat
+    func dequeueCell(collectionView collectionView: UICollectionView, indexPath: NSIndexPath) -> UICollectionViewCell
+    func configureCell(cell: UICollectionViewCell, decorationAttributes: ChatItemDecorationAttributesProtocol?)
+    func cellWillBeShown(cell: UICollectionViewCell) // optional
+    func cellWasHidden(cell: UICollectionViewCell) // optional
+    func shouldShowMenu() -> Bool // optional. Default is false
+    func canPerformMenuControllerAction(action: Selector) -> Bool // optional. Default is false
+    func performMenuControllerAction(action: Selector) // optional
+}
+
+public extension ChatItemPresenterProtocol { // Optionals
+    var canCalculateHeightInBackground: Bool { return false }
+    func cellWillBeShown(cell: UICollectionViewCell) {}
+    func cellWasHidden(cell: UICollectionViewCell) {}
+    func shouldShowMenu() -> Bool { return false }
+    func canPerformMenuControllerAction(action: Selector) -> Bool { return false }
+    func performMenuControllerAction(action: Selector) {}
+}
+
+public protocol ChatItemPresenterBuilderProtocol {
+    func canHandleChatItem(chatItem: ChatItemProtocol) -> Bool
+    func createPresenterWithChatItem(chatItem: ChatItemProtocol) -> ChatItemPresenterProtocol
+    var presenterType: ChatItemPresenterProtocol.Type { get }
+}

Chatto/Source/Chat Items/DummyChatItemPresenter.swift

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+/*
+ The MIT License (MIT)
+
+ Copyright (c) 2015-present Badoo Trading Limited.
+
+ Permission is hereby granted, free of charge, to any person obtaining a copy
+ of this software and associated documentation files (the "Software"), to deal
+ in the Software without restriction, including without limitation the rights
+ to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ copies of the Software, and to permit persons to whom the Software is
+ furnished to do so, subject to the following conditions:
+
+ The above copyright notice and this permission notice shall be included in
+ all copies or substantial portions of the Software.
+
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ THE SOFTWARE.
+*/
+
+import Foundation
+
+// Handles messages that aren't supported so they appear as invisible
+class DummyChatItemPresenter: ChatItemPresenterProtocol {
+
+    class func registerCells(collectionView: UICollectionView) {
+        collectionView.registerClass(DummyCollectionViewCell.self, forCellWithReuseIdentifier: "cell-id-unhandled-message")
+    }
+
+    var canCalculateHeightInBackground: Bool {
+        return true
+    }
+
+    func heightForCell(maximumWidth width: CGFloat, decorationAttributes: ChatItemDecorationAttributesProtocol?) -> CGFloat {
+        return 0
+    }
+
+    func dequeueCell(collectionView collectionView: UICollectionView, indexPath: NSIndexPath) -> UICollectionViewCell {
+        return collectionView.dequeueReusableCellWithReuseIdentifier("cell-id-unhandled-message", forIndexPath: indexPath)
+    }
+
+    func configureCell(cell: UICollectionViewCell, decorationAttributes: ChatItemDecorationAttributesProtocol?) {
+        cell.hidden = true
+    }
+}
+
+
+class DummyCollectionViewCell: UICollectionViewCell {}