Initial commit

.github/workflows/swift.yml

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+name: Swift
+on: [push]
+jobs:
+  build:
+    name: Swift ${{ matrix.swift }} on ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [macos-latest]
+        swift: ["5.9"]
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: swift-actions/[email protected]
+        with:
+          swift-version: ${{ matrix.swift }}
+      - uses: actions/checkout@v4
+      - name: Build
+        run: swift build

.gitignore

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+.DS_Store
+/.build
+/Packages
+xcuserdata/
+DerivedData/
+.swiftpm/configuration/registries.json
+.swiftpm/xcode/package.xcworkspace/contents.xcworkspacedata
+.netrc

.swiftformat

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+--indent 2

.swiftlint.yml

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+included:
+  - Package.swift
+  - Sources/Swift
+strict: true
+opt_in_rules:
+  - indentation_width
+line_length: 100
+indentation_width:
+  indentation_width: 2
+identifier_name:
+  excluded: # excluded via string array
+    - id
+    - to
+trailing_comma:
+  mandatory_comma: true

DOCS.md

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+# DOCS
+
+> Night Shift automatically shifts the colours of your display to the warmer end of the colour spectrum after dark. This may help you get a better night's sleep.
+
+Under "System Settings > Display > Night Shift" you find the UI controls.
+
+It supports three schedules
+
+1. Off
+2. Sunset to Sunrise
+3. Custom
+
+When "Off" (`mode: 0`), you can turn it on for a single day toggling "Turn on until "tomorrow"
+
+When "Sunset to Sunrise" (`mode: 1`), the schedule is automatic, and you can toggle it active until the next "sunrise"
+
+When "Custom" (`mode: 2`), you can set a daily schedule, and additionally toggle it active until "tomorrow"
+
+In all three modes, you can select a colour temperature, on a sliding scale between "Less Warm" and "More Warm"
+
+## Technical
+
+The status object
+
+```
+  var status: Status = Status()
+  client.getBlueLightStatus(&status)
+```
+
+```
+// seems to control the temporary setting until tomorrow/sunrise
+enabled: true|false
+available: true|false
+
+// I guesss this has to do with location based information
+sunSchedulePermitted: true|false
+disableFlags: 0
+mode: 0|1|2
+schedule(fromTime(hour,minute),toTime(hour,minute))
+```

Makefile

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+name = nightshift
+prefix ?= $(HOME)/.local
+bindir = $(prefix)/bin
+
+build:
+	swift build
+
+run: build
+	swift run $(name)
+
+release:
+	swift build --configuration release --disable-sandbox --arch arm64
+
+install: release
+	install -d "$(bindir)"
+	install ".build/release/$(name)" "$(bindir)"
+
+uninstall:
+	rm -rf "$(bindir)/$(name)"
+
+# requires `brew install swiftlint`
+lint:
+	swiftlint
+
+clean:
+	rm -rf .build
+
+.PHONY: build install uninstall clean release

Package.resolved

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+{
+  "pins" : [
+    {
+      "identity" : "swift-argument-parser",
+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/apple/swift-argument-parser",
+      "state" : {
+        "revision" : "8f4d2753f0e4778c76d5f05ad16c74f707390531",
+        "version" : "1.2.3"
+      }
+    }
+  ],
+  "version" : 2
+}

Package.swift

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+// swift-tools-version: 5.9
+// The swift-tools-version declares the minimum version of Swift required to build this package.
+
+import PackageDescription
+
+let package = Package(
+  name: "nightshift",
+  dependencies: [
+    .package(url: "https://github.com/apple/swift-argument-parser", exact: "1.2.3"),
+  ],
+  targets: [
+    .target(
+      name: "DisplayClient",
+      path: "Sources/ObjC/DisplayClient",
+      linkerSettings: [
+        .unsafeFlags(["-F/System/Library/PrivateFrameworks"]),
+        .linkedFramework("CoreBrightness"),
+      ]
+    ),
+    .executableTarget(
+      name: "nightshift",
+      dependencies: [
+        .byName(name: "DisplayClient"),
+        .product(name: "ArgumentParser", package: "swift-argument-parser"),
+      ],
+      path: "Sources/Swift"
+    ),
+  ]
+)

README.md

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+# README
+
+A macOS tool to read and control the [Night Shift](https://support.apple.com/en-us/102191) feature.
+
+## Usage
+
+Print out current settings
+
+```
+nightshift
+Schedule: sunrise
+Enabled: true
+Temperature: 0.49
+```
+
+Control modes
+
+```
+nightshift schedule
+nightshift schedule off
+nightshift schedule custom --from 11:00 --to 23:00 -t 0.3
+nightshift schedule sunrise --temperature 0.3
+```
+
+Control details
+
+```
+nightshift enable
+nightshift disable
+nightshift temperature
+nightshift temperature 0.33
+```
+
+## Installation
+
+**Via Github**
+
+```
+git clone [email protected]:oschrenk/nightshift.swift.git
+cd nightshift.swift
+
+# installs to $(HOME)/.local/bin/nightshift
+make install
+```
+
+## Development
+
+- **Build** `make build`
+- **Run** `make run`
+- **Lint** `make lint`
+
+## Release
+
+```
+make release
+# produces artifact in in ./.build/release/nightshift
+```

Sources/ObjC/DisplayClient/include/DisplayClient.h

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+#import <Foundation/Foundation.h>
+
+// Partial header for CBBlueLightClient in private CoreBrightness API
+@interface CBBlueLightClient : NSObject
+
+typedef struct {
+    int hour;
+    int minute;
+} Time;
+
+typedef struct {
+    Time fromTime;
+    Time toTime;
+} ScheduleObjC;
+
+typedef struct {
+    BOOL active;
+    BOOL enabled;
+    BOOL sunSchedulePermitted;
+    int mode;
+    ScheduleObjC schedule;
+    unsigned long long disableFlags;
+    BOOL available;
+} Status;
+
+- (BOOL)setStrength:(float)strength commit:(BOOL)commit;
+- (BOOL)setEnabled:(BOOL)enabled;
+- (BOOL)setMode:(int)mode;
+- (BOOL)setSchedule:(ScheduleObjC *)schedule;
+- (BOOL)getStrength:(float *)strength;
+- (BOOL)getBlueLightStatus:(Status *)status;
+- (void)setStatusNotificationBlock:(void (^)(void))block;
++ (BOOL)supportsBlueLightReduction;
+@end

Sources/Swift/AppError.swift

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+import Foundation
+
+enum AppError: Error {
+  case decodingError(String)
+}
+
+extension AppError: LocalizedError {
+  public var errorDescription: String? {
+    switch self {
+    case let .decodingError(comment):
+      return NSLocalizedString("Application Error.", comment: comment)
+    }
+  }
+}