Initial commit

.gitignore

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+.DS_Store
+*.xcodeproj/*.mode?v?
+*.xcodeproj/*.pbxuser
+*.xcodeproj/project.xcworkspace/
+*.xcodeproj/xcuserdata/

CalltoBouncer/AppDelegate.swift

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+//
+//  AppDelegate.swift
+//  CalltoBouncer
+//
+//  Copyright © 2017 64 Characters
+//
+
+import Cocoa
+
+@NSApplicationMain
+final class AppDelegate: NSObject, NSApplicationDelegate {
+    private let target = OpenURLEventTarget(manager: NSAppleEventManager.shared(), workspace: NSWorkspace.shared())
+}
+

CalltoBouncer/Base.lproj/Main.xib

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+<?xml version="1.0" encoding="UTF-8"?>
+<document type="com.apple.InterfaceBuilder3.Cocoa.XIB" version="3.0" toolsVersion="11762" systemVersion="16D32" targetRuntime="MacOSX.Cocoa" propertyAccessControl="none" useAutolayout="YES" customObjectInstantitationMethod="direct">
+    <dependencies>
+        <plugIn identifier="com.apple.InterfaceBuilder.CocoaPlugin" version="11762"/>
+    </dependencies>
+    <objects>
+        <customObject id="-2" userLabel="File's Owner" customClass="NSApplication">
+            <connections>
+                <outlet property="delegate" destination="Voe-Tx-rLC" id="GzC-gU-4Uq"/>
+            </connections>
+        </customObject>
+        <customObject id="-1" userLabel="First Responder" customClass="FirstResponder"/>
+        <customObject id="-3" userLabel="Application" customClass="NSObject"/>
+        <customObject id="Voe-Tx-rLC" customClass="AppDelegate" customModule="CalltoAdapter" customModuleProvider="target"/>
+    </objects>
+</document>

CalltoBouncer/CalltoBouncer.entitlements

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>com.apple.security.app-sandbox</key>
+	<true/>
+</dict>
+</plist>

CalltoBouncer/Info.plist

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>en</string>
+	<key>CFBundleExecutable</key>
+	<string>$(EXECUTABLE_NAME)</string>
+	<key>CFBundleIconFile</key>
+	<string></string>
+	<key>CFBundleIdentifier</key>
+	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleName</key>
+	<string>$(PRODUCT_NAME)</string>
+	<key>CFBundlePackageType</key>
+	<string>APPL</string>
+	<key>CFBundleShortVersionString</key>
+	<string>1.0</string>
+	<key>CFBundleURLTypes</key>
+	<array>
+		<dict>
+			<key>CFBundleTypeRole</key>
+			<string>Editor</string>
+			<key>CFBundleURLName</key>
+			<string>Callto URL</string>
+			<key>CFBundleURLSchemes</key>
+			<array>
+				<string>callto</string>
+			</array>
+		</dict>
+	</array>
+	<key>CFBundleVersion</key>
+	<string>1</string>
+	<key>LSMinimumSystemVersion</key>
+	<string>$(MACOSX_DEPLOYMENT_TARGET)</string>
+	<key>NSHumanReadableCopyright</key>
+	<string>Copyright © 2017 64 Characters</string>
+	<key>NSMainNibFile</key>
+	<string>Main</string>
+	<key>NSPrincipalClass</key>
+	<string>NSApplication</string>
+	<key>LSBackgroundOnly</key>
+	<true/>
+</dict>
+</plist>

CalltoBouncer/OpenURLEventTarget.swift

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+//
+//  OpenURLEventTarget.swift
+//  CalltoBouncer
+//
+//  Copyright © 2017 64 Characters
+//
+
+import Cocoa
+
+final class OpenURLEventTarget {
+    private let manager: NSAppleEventManager
+    private let workspace: NSWorkspace
+
+    init(manager: NSAppleEventManager, workspace: NSWorkspace) {
+        self.manager = manager
+        self.workspace = workspace
+        self.manager.setEventHandler(
+            self,
+            andSelector: #selector(handle(_:reply:)),
+            forEventClass: AEEventClass(kInternetEventClass),
+            andEventID: AEEventID(kAEGetURL)
+        )
+    }
+
+    deinit {
+        manager.removeEventHandler(forEventClass: AEEventClass(kInternetEventClass), andEventID: AEEventID(kAEGetURL))
+    }
+
+    @objc private func handle(_ event: NSAppleEventDescriptor, reply: NSAppleEventDescriptor) {
+        if let calltoURL = event.paramDescriptor(forKeyword: keyDirectObject)?.stringValue {
+            if let telURL = URL(string: TelURL(phone: PhoneNumber(calltoURL: calltoURL))) {
+                workspace.open(telURL)
+            }
+        }
+    }
+}

CalltoBouncer/PhoneNumber.swift

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+//
+//  PhoneNumber.swift
+//  CalltoBouncer
+//
+//  Copyright © 2017 64 Characters
+//
+
+import Foundation
+
+typealias PhoneNumber = String
+
+extension PhoneNumber {
+    init(calltoURL url: String) {
+        self = strippingSlashes(from: strippingCallto(from: url))
+    }
+}
+
+private func strippingCallto(from string: String) -> String {
+    if let range = string.range(of: "callto:") {
+        return string.substring(from: range.upperBound)
+    } else {
+        return string
+    }
+}
+
+private func strippingSlashes(from string: String) -> String {
+    if let range = string.range(of: "//") {
+        return string.substring(from: range.upperBound)
+    } else {
+        return string
+    }
+}

CalltoBouncer/TelURL.swift

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+//
+//  TelURL.swift
+//  CalltoBouncer
+//
+//  Copyright © 2017 64 Characters
+//
+
+typealias TelURL = String
+
+extension TelURL {
+    init(phone: PhoneNumber) {
+        self = "tel:\(phone)"
+    }
+}

CalltoBouncerTests/Info.plist

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>en</string>
+	<key>CFBundleExecutable</key>
+	<string>$(EXECUTABLE_NAME)</string>
+	<key>CFBundleIdentifier</key>
+	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleName</key>
+	<string>$(PRODUCT_NAME)</string>
+	<key>CFBundlePackageType</key>
+	<string>BNDL</string>
+	<key>CFBundleShortVersionString</key>
+	<string>1.0</string>
+	<key>CFBundleVersion</key>
+	<string>1</string>
+</dict>
+</plist>

CalltoBouncerTests/PhoneNumberTests.swift

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+//
+//  PhoneNumberTests.swift
+//  CalltoBouncer
+//
+//  Copyright © 2017 64 Characters
+//
+
+import XCTest
+
+final class PhoneNumberTests: XCTestCase {
+    func testStripsCallto() {
+        let sut = PhoneNumber(calltoURL: "callto:any")
+
+        XCTAssertEqual(sut, "any")
+    }
+
+    func testStripsTwoSlashes() {
+        let sut = PhoneNumber(calltoURL: "callto://any")
+
+        XCTAssertEqual(sut, "any")
+    }
+
+    func testReturnsOriginalStringWhenThereIsNoCallto() {
+        let sut = PhoneNumber(calltoURL: "any")
+
+        XCTAssertEqual(sut, "any")
+    }
+}

CalltoBouncerTests/TelURLTests.swift

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+//
+//  TelURLTests.swift
+//  CalltoBouncer
+//
+//  Copyright © 2017 64 Characters
+//
+
+import XCTest
+
+final class TelURLTests: XCTestCase {
+    func testAddsTelScheme() {
+        let sut = TelURL(phone: PhoneNumber(calltoURL: "callto:any"))
+
+        XCTAssertEqual(sut, "tel:any")
+    }
+}

LICENSE

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+MIT License
+
+Copyright (c) 2017 64 Characters
+
+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.

README.md

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+CalltoBouncer is a macOS utility that handles `callto` URL open events
+by opening `tel` URLs with the same phone number.
+
+It might be useful when you make phone calls by clicking the `callto`
+links and you want those calls to be made via an application that only
+responds to the `tel` URLs.
+
+If another application that handles the `callto` URLs is already
+present in the system and being opened, CalltoBouncer needs to be set
+as a handler for this URL scheme. This can be done via the
+[RCDefaultApp] perference pane.
+
+CalltoBouncer works in background and doesn't have any UI. Once
+registered as a handler, it doesn't even need to be automatically
+started with the system strart, because the system launches it when
+needed.
+
+[RCDefaultApp]: http://www.rubicode.com/Software/RCDefaultApp/