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feat(Widget): Implement Followers Widget chart

This commit is contained in:
Marcus Kida 2023-01-30 15:28:16 +01:00
parent 1558579a86
commit e2fe1263a4
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GPG Key ID: 19FF64E08013CA40
11 changed files with 650 additions and 44 deletions
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64
Mastodon.xcodeproj/project.pbxproj
View File

@ -24,8 +24,14 @@
27D701F5292FC2D60031BCBB /* DataSourceFacade+URL.swift in Sources */ = {isa = PBXBuildFile; fileRef = 27D701F4292FC2D60031BCBB /* DataSourceFacade+URL.swift */; };
2A1FE47C2938BB2600784BF1 /* FollowedTagsViewModel+DiffableDataSource.swift in Sources */ = {isa = PBXBuildFile; fileRef = 2A1FE47B2938BB2600784BF1 /* FollowedTagsViewModel+DiffableDataSource.swift */; };
2A1FE47E2938C11200784BF1 /* Collection+IsNotEmpty.swift in Sources */ = {isa = PBXBuildFile; fileRef = 2A1FE47D2938C11200784BF1 /* Collection+IsNotEmpty.swift */; };
2A33062D2987DBFA001D4C51 /* FollowersCountHistory.swift in Sources */ = {isa = PBXBuildFile; fileRef = 2A33062C2987DBFA001D4C51 /* FollowersCountHistory.swift */; };
2A33063629880835001D4C51 /* Math.swift in Sources */ = {isa = PBXBuildFile; fileRef = 2A33062F29880834001D4C51 /* Math.swift */; };
2A33063729880835001D4C51 /* DataRepresentable.swift in Sources */ = {isa = PBXBuildFile; fileRef = 2A33063029880834001D4C51 /* DataRepresentable.swift */; };
2A33063829880835001D4C51 /* LineChart.swift in Sources */ = {isa = PBXBuildFile; fileRef = 2A33063229880834001D4C51 /* LineChart.swift */; };
2A33063929880835001D4C51 /* CurvedChart.swift in Sources */ = {isa = PBXBuildFile; fileRef = 2A33063329880834001D4C51 /* CurvedChart.swift */; };
2A33063A29880835001D4C51 /* LightChart.swift in Sources */ = {isa = PBXBuildFile; fileRef = 2A33063429880834001D4C51 /* LightChart.swift */; };
2A33063B29880835001D4C51 /* ChartType.swift in Sources */ = {isa = PBXBuildFile; fileRef = 2A33063529880834001D4C51 /* ChartType.swift */; };
2A33AB662982C4AF008A7FB1 /* FollowCountWidgetView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 2A33AB652982C4AF008A7FB1 /* FollowCountWidgetView.swift */; };
2A33AB6D2987C2B3008A7FB1 /* LightChart in Frameworks */ = {isa = PBXBuildFile; productRef = 2A33AB6C2987C2B3008A7FB1 /* LightChart */; };
2A3F6FE3292ECB5E002E6DA7 /* FollowedTagsViewModel.swift in Sources */ = {isa = PBXBuildFile; fileRef = 2A3F6FE2292ECB5E002E6DA7 /* FollowedTagsViewModel.swift */; };
2A3F6FE5292F6E44002E6DA7 /* FollowedTagsTableViewCell.swift in Sources */ = {isa = PBXBuildFile; fileRef = 2A3F6FE4292F6E44002E6DA7 /* FollowedTagsTableViewCell.swift */; };
2A506CF4292CD85800059C37 /* FollowedTagsViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = 2A506CF3292CD85800059C37 /* FollowedTagsViewController.swift */; };
@ -606,6 +612,13 @@
27D701F4292FC2D60031BCBB /* DataSourceFacade+URL.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "DataSourceFacade+URL.swift"; sourceTree = "<group>"; };
2A1FE47B2938BB2600784BF1 /* FollowedTagsViewModel+DiffableDataSource.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "FollowedTagsViewModel+DiffableDataSource.swift"; sourceTree = "<group>"; };
2A1FE47D2938C11200784BF1 /* Collection+IsNotEmpty.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "Collection+IsNotEmpty.swift"; sourceTree = "<group>"; };
2A33062C2987DBFA001D4C51 /* FollowersCountHistory.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = FollowersCountHistory.swift; sourceTree = "<group>"; };
2A33062F29880834001D4C51 /* Math.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = Math.swift; sourceTree = "<group>"; };
2A33063029880834001D4C51 /* DataRepresentable.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = DataRepresentable.swift; sourceTree = "<group>"; };
2A33063229880834001D4C51 /* LineChart.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = LineChart.swift; sourceTree = "<group>"; };
2A33063329880834001D4C51 /* CurvedChart.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = CurvedChart.swift; sourceTree = "<group>"; };
2A33063429880834001D4C51 /* LightChart.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = LightChart.swift; sourceTree = "<group>"; };
2A33063529880834001D4C51 /* ChartType.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = ChartType.swift; sourceTree = "<group>"; };
2A33625329759B4200481A90 /* OpenInActionExtension.entitlements */ = {isa = PBXFileReference; lastKnownFileType = text.plist.entitlements; path = OpenInActionExtension.entitlements; sourceTree = "<group>"; };
2A33AB652982C4AF008A7FB1 /* FollowCountWidgetView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = FollowCountWidgetView.swift; sourceTree = "<group>"; };
2A3F6FE2292ECB5E002E6DA7 /* FollowedTagsViewModel.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = FollowedTagsViewModel.swift; sourceTree = "<group>"; };
@ -1197,7 +1210,6 @@
isa = PBXFrameworksBuildPhase;
buildActionMask = 2147483647;
files = (
2A33AB6D2987C2B3008A7FB1 /* LightChart in Frameworks */,
2A72813B297EC6F7004138C5 /* MastodonSDKDynamic in Frameworks */,
2A728124297EA9D7004138C5 /* SwiftUI.framework in Frameworks */,
2A728122297EA9D7004138C5 /* WidgetKit.framework in Frameworks */,
@ -1376,6 +1388,27 @@
path = Pods;
sourceTree = "<group>";
};
2A33062E29880834001D4C51 /* LightChart */ = {
isa = PBXGroup;
children = (
2A33063129880834001D4C51 /* Charts */,
2A33062F29880834001D4C51 /* Math.swift */,
2A33063029880834001D4C51 /* DataRepresentable.swift */,
2A33063429880834001D4C51 /* LightChart.swift */,
2A33063529880834001D4C51 /* ChartType.swift */,
);
path = LightChart;
sourceTree = "<group>";
};
2A33063129880834001D4C51 /* Charts */ = {
isa = PBXGroup;
children = (
2A33063229880834001D4C51 /* LineChart.swift */,
2A33063329880834001D4C51 /* CurvedChart.swift */,
);
path = Charts;
sourceTree = "<group>";
};
2A33AB642982C4A3008A7FB1 /* WidgetViews */ = {
isa = PBXGroup;
children = (
@ -1410,11 +1443,13 @@
2A728125297EA9D7004138C5 /* WidgetExtension */ = {
isa = PBXGroup;
children = (
2A33062E29880834001D4C51 /* LightChart */,
2A33AB642982C4A3008A7FB1 /* WidgetViews */,
2AE202A9297FDDF500F66E55 /* WidgetExtension.entitlements */,
2A72813E297EC762004138C5 /* WidgetExtension.swift */,
2A728126297EA9D7004138C5 /* WidgetExtensionBundle.swift */,
2A72812A297EA9D7004138C5 /* FollowersWidgetExtension.swift */,
2A33062C2987DBFA001D4C51 /* FollowersCountHistory.swift */,
2A72812C297EA9D7004138C5 /* WidgetExtension.intentdefinition */,
2A72812D297EA9D8004138C5 /* Assets.xcassets */,
2A72812F297EA9D8004138C5 /* Info.plist */,
@ -2960,7 +2995,6 @@
name = WidgetExtension;
packageProductDependencies = (
2A72813A297EC6F7004138C5 /* MastodonSDKDynamic */,
2A33AB6C2987C2B3008A7FB1 /* LightChart */,
);
productName = WidgetExtensionExtension;
productReference = 2A728120297EA9D7004138C5 /* WidgetExtension.appex */;
@ -3174,7 +3208,6 @@
);
mainGroup = DB427DC925BAA00100D1B89D;
packageReferences = (
2A33AB6B2987C2B3008A7FB1 /* XCRemoteSwiftPackageReference "LightChart" */,
);
productRefGroup = DB427DD325BAA00100D1B89D /* Products */;
projectDirPath = "";
@ -3440,11 +3473,18 @@
isa = PBXSourcesBuildPhase;
buildActionMask = 2147483647;
files = (
2A33063729880835001D4C51 /* DataRepresentable.swift in Sources */,
2A33062D2987DBFA001D4C51 /* FollowersCountHistory.swift in Sources */,
2A33063829880835001D4C51 /* LineChart.swift in Sources */,
2A728130297EA9D8004138C5 /* WidgetExtension.intentdefinition in Sources */,
2A72813F297EC762004138C5 /* WidgetExtension.swift in Sources */,
2A33063A29880835001D4C51 /* LightChart.swift in Sources */,
2A33063B29880835001D4C51 /* ChartType.swift in Sources */,
2A33063629880835001D4C51 /* Math.swift in Sources */,
2A33AB662982C4AF008A7FB1 /* FollowCountWidgetView.swift in Sources */,
2A728127297EA9D7004138C5 /* WidgetExtensionBundle.swift in Sources */,
2A72812B297EA9D7004138C5 /* FollowersWidgetExtension.swift in Sources */,
2A33063929880835001D4C51 /* CurvedChart.swift in Sources */,
);
runOnlyForDeploymentPostprocessing = 0;
};
@ -5246,23 +5286,7 @@
};
/* End XCConfigurationList section */
/* Begin XCRemoteSwiftPackageReference section */
2A33AB6B2987C2B3008A7FB1 /* XCRemoteSwiftPackageReference "LightChart" */ = {
isa = XCRemoteSwiftPackageReference;
repositoryURL = "https://github.com/pichukov/LightChart.git";
requirement = {
kind = upToNextMajorVersion;
minimumVersion = 1.0.0;
};
};
/* End XCRemoteSwiftPackageReference section */
/* Begin XCSwiftPackageProductDependency section */
2A33AB6C2987C2B3008A7FB1 /* LightChart */ = {
isa = XCSwiftPackageProductDependency;
package = 2A33AB6B2987C2B3008A7FB1 /* XCRemoteSwiftPackageReference "LightChart" */;
productName = LightChart;
};
2A72813A297EC6F7004138C5 /* MastodonSDKDynamic */ = {
isa = XCSwiftPackageProductDependency;
productName = MastodonSDKDynamic;

9
Mastodon.xcworkspace/xcshareddata/swiftpm/Package.resolved
View File

@ -73,15 +73,6 @@
"version": "4.2.2"
}
},
{
"package": "LightChart",
"repositoryURL": "https://github.com/pichukov/LightChart.git",
"state": {
"branch": null,
"revision": "206fe7ab50620891c89531e2598e36e965678a1a",
"version": "1.0.3"
}
},
{
"package": "MetaTextKit",
"repositoryURL": "https://github.com/TwidereProject/MetaTextKit.git",

112
WidgetExtension/FollowersCountHistory.swift Normal file
View File

@ -0,0 +1,112 @@
// Copyright © 2023 Mastodon gGmbH. All rights reserved.
import Foundation
import MastodonSDK
struct FollowersCountHistoryDay: Codable {
let dstring: String
let day: Int
let count: Int
func copy(count: Int) -> Self {
FollowersCountHistoryDay(dstring: dstring, day: day, count: count)
}
}
class FollowersCountHistory {
static let shared = FollowersCountHistory()
private let userDefaults = UserDefaults.standard
private let calendar = Calendar.current
private let followersCountCacheDateFormatter: DateFormatter = {
let formatter = DateFormatter()
formatter.dateFormat = "yyyyMMdd"
return formatter
}()
private func elapsedFollowersCountDateStrings() -> [String] {
(-7...0).map { elapsedDay in
let date = calendar.date(byAdding: .day, value: elapsedDay, to: .now)!
return followersCountCacheDateFormatter.string(from: date)
}
}
private func userDefaultsKey(for account: FollowersEntryAccountable) -> String {
if account.acct.contains("@") {
return account.acct
}
return "\(account.acct)@\(account.domain)"
}
private func emptyHistoricDataForToday(for account: FollowersEntryAccountable) -> [FollowersCountHistoryDay] {
elapsedFollowersCountDateStrings().enumerated().map { FollowersCountHistoryDay(dstring: $0.element, day: $0.offset, count: account.followersCount) }
}
private func followersHistorySorted(for account: FollowersEntryAccountable) -> [FollowersCountHistoryDay] {
guard
let jsonData = userDefaults.string(forKey: userDefaultsKey(for: account))?.data(using: .utf8),
let jsonObject = try? JSONDecoder().decode([FollowersCountHistoryDay].self, from: jsonData)
else {
return emptyHistoricDataForToday(for: account)
}
return jsonObject
}
func updateFollowersTodayCount(account: FollowersEntryAccountable, count: Int) {
let relevantDays = elapsedFollowersCountDateStrings()
let existingHistory = followersHistorySorted(for: account)
var newHistory = existingHistory
/// first we're going to update the existing day and remove legacy days (older than 7)
existingHistory.forEach { existingDay in
if !relevantDays.contains(where: { $0 == existingDay.dstring }) {
/// remove legacy data/
newHistory.removeAll(where: { $0.dstring == existingDay.dstring })
}
}
relevantDays.enumerated().forEach { index, day in
if !newHistory.contains(where: { $0.dstring == day }) {
newHistory.insert(
FollowersCountHistoryDay(dstring: day, day: index, count: account.followersCount),
at: index
)
}
}
/// then we're going to update the history dataset with new value, if this is the first encounter
if let last = newHistory.popLast()?.copy(count: count) {
newHistory.append(last)
}
if let jsonData = try? JSONEncoder().encode(newHistory), let jsonString = String(data: jsonData, encoding: .utf8) {
userDefaults.set(jsonString, forKey: userDefaultsKey(for: account))
}
}
func chartValues(for account: FollowersEntryAccountable) -> [Double] {
followersHistorySorted(for: account).map { Double($0.count) }
}
func increaseCountString(for account: FollowersEntryAccountable) -> String? {
let history = followersHistorySorted(for: account)
let relevantDays = elapsedFollowersCountDateStrings()
let today = relevantDays.last!
let yesterday = relevantDays[relevantDays.count - 2]
let followersToday = history.first(where: { $0.dstring == today })?.count ?? account.followersCount
let followersYesterday = history.first(where: { $0.dstring == yesterday })?.count ?? account.followersCount
let followersChange = followersToday - followersYesterday
switch followersChange {
case ..<0:
return "\(followersChange)"
case 0:
return nil
default:
return "+\(followersChange)"
}
}
}

19
WidgetExtension/FollowersWidgetExtension.swift
View File

@ -6,6 +6,8 @@ import Intents
import MastodonSDK
struct FollowersProvider: IntentTimelineProvider {
private let followersHistory = FollowersCountHistory.shared
func placeholder(in context: Context) -> FollowersEntry {
.placeholder
}
@ -36,7 +38,8 @@ struct FollowersEntry: TimelineEntry {
followersCount: 99_900,
displayNameWithFallback: "Mastodon",
acct: "mastodon",
avatarImage: UIImage(named: "missingAvatar")!
avatarImage: UIImage(named: "missingAvatar")!,
domain: "mastodon"
),
configuration: FollowersCountIntent()
)
@ -103,10 +106,17 @@ private extension FollowersProvider {
date: Date(),
account: FollowersEntryAccount.from(
mastodonAccount: resultingAccount,
domain: authBox.domain,
avatarImage: UIImage(data: imageData) ?? UIImage(named: "missingAvatar")!
),
configuration: configuration
)
followersHistory.updateFollowersTodayCount(
account: entry.account!,
count: resultingAccount.followersCount
)
completion(entry)
}
}
@ -117,6 +127,7 @@ protocol FollowersEntryAccountable {
var displayNameWithFallback: String { get }
var acct: String { get }
var avatarImage: UIImage { get }
var domain: String { get }
}
struct FollowersEntryAccount: FollowersEntryAccountable {
@ -124,13 +135,15 @@ struct FollowersEntryAccount: FollowersEntryAccountable {
let displayNameWithFallback: String
let acct: String
let avatarImage: UIImage
let domain: String
static func from(mastodonAccount: Mastodon.Entity.Account, avatarImage: UIImage) -> Self {
static func from(mastodonAccount: Mastodon.Entity.Account, domain: String, avatarImage: UIImage) -> Self {
FollowersEntryAccount(
followersCount: mastodonAccount.followersCount,
displayNameWithFallback: mastodonAccount.displayNameWithFallback,
acct: mastodonAccount.acct,
avatarImage: avatarImage
avatarImage: avatarImage,
domain: domain
)
}
}

25
WidgetExtension/LightChart/ChartType.swift Normal file
View File

@ -0,0 +1,25 @@
//
// ChartType.swift
//
//
// Created by Alexey Pichukov on 19.08.2020.
//
import SwiftUI
public enum ChartType {
case line
case curved
}
public enum ChartVisualType {
case outline(color: Color, lineWidth: CGFloat)
case filled(color: Color, lineWidth: CGFloat)
case customFilled(color: Color, lineWidth: CGFloat, fillGradient: LinearGradient)
}
public enum CurrentValueLineType {
case none
case line(color: Color, lineWidth: CGFloat)
case dash(color: Color, lineWidth: CGFloat, dash: [CGFloat])
}

170
WidgetExtension/LightChart/Charts/CurvedChart.swift Normal file
View File

@ -0,0 +1,170 @@
//
// File.swift
//
//
// Created by Alexey Pichukov on 20.08.2020.
//
import SwiftUI
public struct CurvedChart: View {
private let data: [Double]
private let frame: CGRect
private let offset: Double
private let type: ChartVisualType
private let currentValueLineType: CurrentValueLineType
private var points: [CGPoint] = []
/// Creates a new `CurvedChart`
///
/// - Parameters:
/// - data: A data set that should be presented on the chart
/// - frame: A frame from the parent view
/// - visualType: A type of chart, `.outline` by default
/// - offset: An offset for the chart, a space below the chart in percentage (0 - 1)
/// For example `offset: 0.2` means that the chart will occupy 80% of the upper
/// part of the view
/// - currentValueLineType: A type of current value line (`none` for no line on chart)
public init(data: [Double],
frame: CGRect,
visualType: ChartVisualType = .outline(color: .red, lineWidth: 2),
offset: Double = 0,
currentValueLineType: CurrentValueLineType = .none) {
self.data = data
self.frame = frame
self.type = visualType
self.offset = offset
self.currentValueLineType = currentValueLineType
self.points = points(forData: data,
frame: frame,
offset: offset,
lineWidth: lineWidth(visualType: visualType))
}
public var body: some View {
ZStack {
chart
.rotationEffect(.degrees(180), anchor: .center)
.rotation3DEffect(.degrees(180), axis: (x: 0, y: 1, z: 0))
.drawingGroup()
line
.rotationEffect(.degrees(180), anchor: .center)
.rotation3DEffect(.degrees(180), axis: (x: 0, y: 1, z: 0))
.drawingGroup()
}
}
private var chart: some View {
switch type {
case .outline(let color, let lineWidth):
return AnyView(curvedPath(points: points)
.stroke(color, style: StrokeStyle(lineWidth: lineWidth, lineJoin: .round)))
case .filled(let color, let lineWidth):
return AnyView(ZStack {
curvedPathGradient(points: points)
.fill(LinearGradient(
gradient: .init(colors: [color.opacity(0.2), color.opacity(0.02)]),
startPoint: .init(x: 0.5, y: 1),
endPoint: .init(x: 0.5, y: 0)
))
curvedPath(points: points)
.stroke(color, style: StrokeStyle(lineWidth: lineWidth, lineJoin: .round))
})
case .customFilled(let color, let lineWidth, let fillGradient):
return AnyView(ZStack {
curvedPathGradient(points: points)
.fill(fillGradient)
curvedPath(points: points)
.stroke(color, style: StrokeStyle(lineWidth: lineWidth, lineJoin: .round))
})
}
}
private var line: some View {
switch currentValueLineType {
case .none:
return AnyView(EmptyView())
case .line(let color, let lineWidth):
return AnyView(
currentValueLinePath(points: points)
.stroke(color, style: StrokeStyle(lineWidth: lineWidth))
)
case .dash(let color, let lineWidth, let dash):
return AnyView(
currentValueLinePath(points: points)
.stroke(color, style: StrokeStyle(lineWidth: lineWidth, dash: dash))
)
}
}
// MARK: private functions
private func curvedPath(points: [CGPoint]) -> Path {
func mid(_ point1: CGPoint, _ point2: CGPoint) -> CGPoint {
return CGPoint(x: (point1.x + point2.x) / 2, y:(point1.y + point2.y) / 2)
}
func control(_ point1: CGPoint, _ point2: CGPoint) -> CGPoint {
var controlPoint = mid(point1, point2)
let delta = abs(point2.y - controlPoint.y)
if point1.y < point2.y {
controlPoint.y += delta
} else if point1.y > point2.y {
controlPoint.y -= delta
}
return controlPoint
}
var path = Path()
guard points.count > 1 else {
return path
}
var startPoint = points[0]
path.move(to: startPoint)
guard points.count > 2 else {
path.addLine(to: points[1])
return path
}
for i in 1..<points.count {
let currentPoint = points[i]
let midPoint = mid(startPoint, currentPoint)
path.addQuadCurve(to: midPoint, control: control(midPoint, startPoint))
path.addQuadCurve(to: currentPoint, control: control(midPoint, currentPoint))
startPoint = currentPoint
}
return path
}
private func curvedPathGradient(points: [CGPoint]) -> Path {
var path = curvedPath(points: points)
guard let lastPoint = points.last else {
return path
}
path.addLine(to: CGPoint(x: lastPoint.x, y: 0))
path.addLine(to: CGPoint(x: 0, y: 0))
path.addLine(to: CGPoint(x: 0, y: points[0].y))
return path
}
private func currentValueLinePath(points: [CGPoint]) -> Path {
var path = Path()
guard let lastPoint = points.last else {
return path
}
path.move(to: CGPoint(x: 0, y: lastPoint.y))
path.addLine(to: lastPoint)
return path
}
}
extension CurvedChart: DataRepresentable { }

138
WidgetExtension/LightChart/Charts/LineChart.swift Normal file
View File

@ -0,0 +1,138 @@
//
// LineChart.swift
//
//
// Created by Alexey Pichukov on 19.08.2020.
//
import SwiftUI
public struct LineChart: View {
private let data: [Double]
private let frame: CGRect
private let offset: Double
private let type: ChartVisualType
private let currentValueLineType: CurrentValueLineType
private var points: [CGPoint] = []
/// Creates a new `LineChart`
///
/// - Parameters:
/// - data: A data set that should be presented on the chart
/// - frame: A frame from the parent view
/// - visualType: A type of chart, `.outline` by default
/// - offset: An offset for the chart, a space below the chart in percentage (0 - 1)
/// For example `offset: 0.2` means that the chart will occupy 80% of the upper
/// part of the view
/// - currentValueLineType: A type of current value line (`none` for no line on chart)
public init(data: [Double],
frame: CGRect,
visualType: ChartVisualType = .outline(color: .red, lineWidth: 2),
offset: Double = 0,
currentValueLineType: CurrentValueLineType = .none) {
self.data = data
self.frame = frame
self.type = visualType
self.offset = offset
self.currentValueLineType = currentValueLineType
self.points = points(forData: data,
frame: frame,
offset: offset,
lineWidth: lineWidth(visualType: visualType))
}
public var body: some View {
ZStack {
chart
.rotationEffect(.degrees(180), anchor: .center)
.rotation3DEffect(.degrees(180), axis: (x: 0, y: 1, z: 0))
.drawingGroup()
line
.rotationEffect(.degrees(180), anchor: .center)
.rotation3DEffect(.degrees(180), axis: (x: 0, y: 1, z: 0))
.drawingGroup()
}
}
private var chart: some View {
switch type {
case .outline(let color, let lineWidth):
return AnyView(linePath(points: points)
.stroke(color, style: StrokeStyle(lineWidth: lineWidth, lineJoin: .round)))
case .filled(let color, let lineWidth):
return AnyView(ZStack {
linePathGradient(points: points)
.fill(LinearGradient(
gradient: .init(colors: [color.opacity(0.2), color.opacity(0.02)]),
startPoint: .init(x: 0.5, y: 1),
endPoint: .init(x: 0.5, y: 0)
))
linePath(points: points)
.stroke(color, style: StrokeStyle(lineWidth: lineWidth, lineJoin: .round))
})
case .customFilled(let color, let lineWidth, let fillGradient):
return AnyView(ZStack {
linePathGradient(points: points)
.fill(fillGradient)
linePath(points: points)
.stroke(color, style: StrokeStyle(lineWidth: lineWidth, lineJoin: .round))
})
}
}
private var line: some View {
switch currentValueLineType {
case .none:
return AnyView(EmptyView())
case .line(let color, let lineWidth):
return AnyView(
currentValueLinePath(points: points)
.stroke(color, style: StrokeStyle(lineWidth: lineWidth))
)
case .dash(let color, let lineWidth, let dash):
return AnyView(
currentValueLinePath(points: points)
.stroke(color, style: StrokeStyle(lineWidth: lineWidth, dash: dash))
)
}
}
// MARK: private functions
private func linePath(points: [CGPoint]) -> Path {
var path = Path()
guard points.count > 1 else {
return path
}
path.move(to: points[0])
for i in 1..<points.count {
path.addLine(to: points[i])
}
return path
}
private func linePathGradient(points: [CGPoint]) -> Path {
var path = linePath(points: points)
guard let lastPoint = points.last else {
return path
}
path.addLine(to: CGPoint(x: lastPoint.x, y: 0))
path.addLine(to: CGPoint(x: 0, y: 0))
path.addLine(to: CGPoint(x: 0, y: points[0].y))
return path
}
private func currentValueLinePath(points: [CGPoint]) -> Path {
var path = Path()
guard let lastPoint = points.last else {
return path
}
path.move(to: CGPoint(x: 0, y: lastPoint.y))
path.addLine(to: lastPoint)
return path
}
}
extension LineChart: DataRepresentable { }

42
WidgetExtension/LightChart/DataRepresentable.swift Normal file
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@ -0,0 +1,42 @@
//
// DataRepresentable.swift
//
//
// Created by Alexey Pichukov on 19.08.2020.
//
import Foundation
import CoreGraphics
protocol DataRepresentable {
func points(forData data: [Double], frame: CGRect, offset: Double, lineWidth: CGFloat) -> [CGPoint]
func lineWidth(visualType: ChartVisualType) -> CGFloat
}
extension DataRepresentable {
func points(forData data: [Double], frame: CGRect, offset: Double, lineWidth: CGFloat) -> [CGPoint] {
var vector = Math.stretchOut(Math.norm(data))
if offset != 0 {
vector = Math.stretchIn(vector, offset: offset)
}
var points: [CGPoint] = []
for i in 0..<vector.count {
let x = frame.size.width / CGFloat(vector.count - 1) * CGFloat(i)
let y = (frame.size.height - lineWidth) * CGFloat(vector[i]) + lineWidth / 2
points.append(CGPoint(x: x, y: y))
}
return points
}
func lineWidth(visualType: ChartVisualType) -> CGFloat {
switch visualType {
case .outline(_, let lineWidth):
return lineWidth
case .filled(_, let lineWidth):
return lineWidth
case .customFilled(_, let lineWidth, _):
return lineWidth
}
}
}

52
WidgetExtension/LightChart/LightChart.swift Normal file
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@ -0,0 +1,52 @@
import SwiftUI
public struct LightChartView: View {
private let data: [Double]
private let type: ChartType
private let visualType: ChartVisualType
private let offset: Double
private let currentValueLineType: CurrentValueLineType
public init(data: [Double],
type: ChartType = .line,
visualType: ChartVisualType = .outline(color: .red, lineWidth: 2),
offset: Double = 0,
currentValueLineType: CurrentValueLineType = .none) {
self.data = data
self.type = type
self.visualType = visualType
self.offset = offset
self.currentValueLineType = currentValueLineType
}
public var body: some View {
GeometryReader { reader in
chart(withFrame: CGRect(x: 0,
y: 0,
width: reader.frame(in: .local).width ,
height: reader.frame(in: .local).height))
}
}
private func chart(withFrame frame: CGRect) -> AnyView {
switch type {
case .line:
return AnyView(
LineChart(data: data,
frame: frame,
visualType: visualType,
offset: offset,
currentValueLineType: currentValueLineType)
)
case .curved:
return AnyView(
CurvedChart(data: data,
frame: frame,
visualType: visualType,
offset: offset,
currentValueLineType: currentValueLineType)
)
}
}
}

34
WidgetExtension/LightChart/Math.swift Normal file
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@ -0,0 +1,34 @@
//
// Math.swift
//
//
// Created by Alexey Pichukov on 19.08.2020.
//
import Foundation
import CoreGraphics
struct Math {
static func norm(_ vector: [Double]) -> [Double] {
let norm = sqrt(Double(vector.reduce(0) { $0 + $1 * $1 }))
return norm == 0 ? vector : vector.map { $0 / norm }
}
static func stretchOut(_ vector: [Double]) -> [Double] {
guard let min = vector.min(),
let rawMax = vector.max() else {
return vector
}
let max = rawMax - min
return vector.map { ($0 - min) / (max != 0 ? max : 1) }
}
static func stretchIn(_ vector: [Double], offset: Double) -> [Double] {
guard let max = vector.max() else {
return vector
}
let newMax = max - offset
return vector.map { $0 * newMax + offset }
}
}

29
WidgetExtension/WidgetViews/FollowCountWidgetView.swift
View File

@ -2,10 +2,11 @@
import SwiftUI
import WidgetKit
import LightChart
import MastodonAsset
struct FollowCountWidgetView: View {
private let followersHistory = FollowersCountHistory.shared
@Environment(\.widgetFamily) var family
var entry: FollowersProvider.Entry
@ -93,21 +94,25 @@ struct FollowCountWidgetView: View {
.padding(.leading, 20)
ZStack {
LightChartView(
data: [200, 205, 208, 213, 210, 211, 212],
type: .line,
visualType: .filled(color: Asset.Colors.Brand.blurple.swiftUIColor, lineWidth: 2),
offset: 0.8 /// this is the positive offset from the bottom edge of the graph (~80% above bottom level)
)
if let account = entry.account {
LightChartView(
data: followersHistory.chartValues(for: account),
type: .line,
visualType: .filled(color: Asset.Colors.Brand.blurple.swiftUIColor, lineWidth: 2),
offset: 0.8 /// this is the positive offset from the bottom edge of the graph (~80% above bottom level)
)
}
HStack {
VStack(alignment: .leading, spacing: 0) {
Spacer()
Text("+4 followers today")
.font(.system(size: 12))
.foregroundColor(.secondary)
.lineLimit(1)
.truncationMode(.tail)
if let increaseCount = followersHistory.increaseCountString(for: account) {
Text("\(increaseCount) followers today")
.font(.system(size: 12))
.foregroundColor(.secondary)
.lineLimit(1)
.truncationMode(.tail)
}
Text(account.followersCount.asAbbreviatedCountString())
.font(.largeTitle)