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| 1 | +// |
| 2 | +// CustomExerciseEngine.swift |
| 3 | +// FitCount |
| 4 | +// |
| 5 | +// Created by QuickPose.ai |
| 6 | +// |
| 7 | + |
| 8 | +import SwiftUI |
| 9 | +import QuickPoseCore |
| 10 | +import Foundation |
| 11 | + |
| 12 | +// MARK: - Joint Angle Definitions |
| 13 | +enum JointSide: Hashable { |
| 14 | + case left, right |
| 15 | +} |
| 16 | + |
| 17 | +struct AngleRange: Hashable { |
| 18 | + let min: Double |
| 19 | + let max: Double |
| 20 | + |
| 21 | + func contains(_ angle: Double) -> Bool { |
| 22 | + // Handle ranges that cross the 0° boundary (e.g., 340° to 90°) |
| 23 | + if min > max { |
| 24 | + // Range crosses 0° boundary: angle is in range if it's >= min OR <= max |
| 25 | + return angle >= min || angle <= max |
| 26 | + } else { |
| 27 | + // Normal range: angle is in range if it's between min and max |
| 28 | + return angle >= min && angle <= max |
| 29 | + } |
| 30 | + } |
| 31 | + |
| 32 | + var description: String { |
| 33 | + if min > max { |
| 34 | + // Show wraparound range more clearly |
| 35 | + return "\(Int(min))° - 0° - \(Int(max))°" |
| 36 | + } else { |
| 37 | + return "\(Int(min)) - \(Int(max))°" |
| 38 | + } |
| 39 | + } |
| 40 | +} |
| 41 | + |
| 42 | +enum JointType: Hashable { |
| 43 | + case elbow(side: JointSide) |
| 44 | + case shoulder(side: JointSide) |
| 45 | + case knee(side: JointSide) |
| 46 | + case hip(side: JointSide) |
| 47 | + |
| 48 | + var description: String { |
| 49 | + switch self { |
| 50 | + case .elbow(let side): return "\(side == .left ? "Left" : "Right") Elbow" |
| 51 | + case .shoulder(let side): return "\(side == .left ? "Left" : "Right") Shoulder" |
| 52 | + case .knee(let side): return "\(side == .left ? "Left" : "Right") Knee" |
| 53 | + case .hip(let side): return "\(side == .left ? "Left" : "Right") Hip" |
| 54 | + } |
| 55 | + } |
| 56 | +} |
| 57 | + |
| 58 | +// MARK: - Exercise Stage Definition |
| 59 | +struct ExerciseStage { |
| 60 | + let id: String |
| 61 | + let name: String |
| 62 | + let requirements: [JointType: AngleRange] |
| 63 | + let description: String |
| 64 | + |
| 65 | + func meetsRequirements(angles: [JointType: Double]) -> Bool { |
| 66 | + for (joint, range) in requirements { |
| 67 | + guard let angle = angles[joint] else { return false } |
| 68 | + if !range.contains(angle) { return false } |
| 69 | + } |
| 70 | + return true |
| 71 | + } |
| 72 | +} |
| 73 | + |
| 74 | +// MARK: - Custom Exercise Definition |
| 75 | +struct CustomExercise { |
| 76 | + let id: String |
| 77 | + let name: String |
| 78 | + let description: String |
| 79 | + let stages: [ExerciseStage] |
| 80 | + let requiredFeatures: [QuickPose.Feature] |
| 81 | + let hideFeedback: Bool |
| 82 | + |
| 83 | + init(id: String, name: String, description: String, stages: [ExerciseStage], requiredFeatures: [QuickPose.Feature], hideFeedback: Bool = false) { |
| 84 | + self.id = id |
| 85 | + self.name = name |
| 86 | + self.description = description |
| 87 | + self.stages = stages |
| 88 | + self.requiredFeatures = requiredFeatures |
| 89 | + self.hideFeedback = hideFeedback |
| 90 | + } |
| 91 | + |
| 92 | + var exerciseDefinition: Exercise { |
| 93 | + return Exercise( |
| 94 | + name: name, |
| 95 | + details: description, |
| 96 | + features: requiredFeatures, |
| 97 | + isCustomExercise: true |
| 98 | + ) |
| 99 | + } |
| 100 | +} |
| 101 | + |
| 102 | +// MARK: - Custom Exercise Engine |
| 103 | +class CustomExerciseEngine: ObservableObject { |
| 104 | + @Published var currentReps: Int = 0 |
| 105 | + @Published var currentStage: String = "" |
| 106 | + @Published var feedbackMessage: String = "" |
| 107 | + @Published var newRepCompleted: Bool = false |
| 108 | + @Published var incorrectJoints: Set<JointType> = [] |
| 109 | + |
| 110 | + internal var exercise: CustomExercise |
| 111 | + private var currentStageIndex: Int = 0 |
| 112 | + private var lastRepTime: Date = Date() |
| 113 | + private var currentAngles: [JointType: Double] = [:] |
| 114 | + private var isInTransition: Bool = false |
| 115 | + |
| 116 | + init(exercise: CustomExercise) { |
| 117 | + self.exercise = exercise |
| 118 | + self.currentStage = exercise.stages.first?.name ?? "" |
| 119 | + // Initialize with first stage feedback only if feedback is not hidden |
| 120 | + if !exercise.hideFeedback, let firstStage = exercise.stages.first { |
| 121 | + self.feedbackMessage = "🔴 \(firstStage.name)\nGet into position" |
| 122 | + } |
| 123 | + } |
| 124 | + |
| 125 | + func processFrame(features: [QuickPose.Feature: QuickPose.FeatureResult]) -> Int { |
| 126 | + // Extract all range of motion angles |
| 127 | + updateAngles(from: features) |
| 128 | + |
| 129 | + // Check current stage requirements |
| 130 | + let currentExerciseStage = exercise.stages[currentStageIndex] |
| 131 | + |
| 132 | + if currentExerciseStage.meetsRequirements(angles: currentAngles) { |
| 133 | + if !isInTransition { |
| 134 | + // We've entered this stage |
| 135 | + isInTransition = true |
| 136 | + currentStage = currentExerciseStage.name |
| 137 | + |
| 138 | + // Move to next stage |
| 139 | + let nextStageIndex = (currentStageIndex + 1) % exercise.stages.count |
| 140 | + |
| 141 | + // If we've completed all stages, count a rep |
| 142 | + if nextStageIndex == 0 { |
| 143 | + currentReps += 1 |
| 144 | + lastRepTime = Date() |
| 145 | + if !exercise.hideFeedback { |
| 146 | + feedbackMessage = "🎉 Rep \(currentReps) Complete!\nStarting over..." |
| 147 | + } |
| 148 | + newRepCompleted = true |
| 149 | + } else { |
| 150 | + let nextStage = exercise.stages[nextStageIndex] |
| 151 | + if !exercise.hideFeedback { |
| 152 | + feedbackMessage = "✅ \(currentExerciseStage.name)\nNext: \(nextStage.name)" |
| 153 | + } |
| 154 | + newRepCompleted = false |
| 155 | + } |
| 156 | + |
| 157 | + currentStageIndex = nextStageIndex |
| 158 | + } |
| 159 | + } else { |
| 160 | + isInTransition = false |
| 161 | + // Provide feedback on what's needed |
| 162 | + updateFeedback(for: currentExerciseStage) |
| 163 | + } |
| 164 | + |
| 165 | + return currentReps |
| 166 | + } |
| 167 | + |
| 168 | + private func updateAngles(from features: [QuickPose.Feature: QuickPose.FeatureResult]) { |
| 169 | + // Get the current stage requirements to determine which direction we need |
| 170 | + let currentStageRequirements = exercise.stages[currentStageIndex].requirements |
| 171 | + |
| 172 | + for feature in features.keys { |
| 173 | + if let result = features[feature] { |
| 174 | + let angle = result.value |
| 175 | + |
| 176 | + if case .rangeOfMotion(let joint, _) = feature { |
| 177 | + // For now, let's simplify and just use all range of motion measurements |
| 178 | + // The direction logic was too complex - let's see what measurements we actually get |
| 179 | + switch joint { |
| 180 | + case .shoulder(side: .left, _): |
| 181 | + currentAngles[.shoulder(side: .left)] = angle |
| 182 | + case .shoulder(side: .right, _): |
| 183 | + currentAngles[.shoulder(side: .right)] = angle |
| 184 | + case .elbow(side: .left, _): |
| 185 | + currentAngles[.elbow(side: .left)] = angle |
| 186 | + case .elbow(side: .right, _): |
| 187 | + currentAngles[.elbow(side: .right)] = angle |
| 188 | + case .knee(side: .left, _): |
| 189 | + currentAngles[.knee(side: .left)] = angle |
| 190 | + case .knee(side: .right, _): |
| 191 | + currentAngles[.knee(side: .right)] = angle |
| 192 | + case .hip(side: .left, _): |
| 193 | + currentAngles[.hip(side: .left)] = angle |
| 194 | + case .hip(side: .right, _): |
| 195 | + currentAngles[.hip(side: .right)] = angle |
| 196 | + default: |
| 197 | + break |
| 198 | + } |
| 199 | + } |
| 200 | + } |
| 201 | + } |
| 202 | + } |
| 203 | + |
| 204 | + private func updateFeedback(for stage: ExerciseStage) { |
| 205 | + // Check if feedback should be hidden |
| 206 | + if exercise.hideFeedback { |
| 207 | + feedbackMessage = "" |
| 208 | + return |
| 209 | + } |
| 210 | + |
| 211 | + var missingRequirements: [String] = [] |
| 212 | + var incorrectJointsSet: Set<JointType> = [] |
| 213 | + |
| 214 | + for (joint, range) in stage.requirements { |
| 215 | + if let angle = currentAngles[joint] { |
| 216 | + if !range.contains(angle) { |
| 217 | + let jointName = joint.description.replacingOccurrences(of: "Left ", with: "L-").replacingOccurrences(of: "Right ", with: "R-") |
| 218 | + missingRequirements.append("\(jointName): \(Int(angle))° (need \(range.description))") |
| 219 | + incorrectJointsSet.insert(joint) |
| 220 | + } |
| 221 | + } else { |
| 222 | + let jointName = joint.description.replacingOccurrences(of: "Left ", with: "L-").replacingOccurrences(of: "Right ", with: "R-") |
| 223 | + missingRequirements.append("\(jointName): Not detected") |
| 224 | + incorrectJointsSet.insert(joint) |
| 225 | + } |
| 226 | + } |
| 227 | + |
| 228 | + // Update the published set of incorrect joints |
| 229 | + incorrectJoints = incorrectJointsSet |
| 230 | + |
| 231 | + if missingRequirements.isEmpty { |
| 232 | + feedbackMessage = "✅ \(stage.name)\nPerfect! Moving to next stage" |
| 233 | + } else if missingRequirements.count == 1 { |
| 234 | + feedbackMessage = "🔴 \(stage.name)\n\(missingRequirements.first!)" |
| 235 | + } else if missingRequirements.count <= 3 { |
| 236 | + feedbackMessage = "🔴 \(stage.name)\n\(missingRequirements.prefix(2).joined(separator: "\n"))" |
| 237 | + } else { |
| 238 | + feedbackMessage = "🔴 \(stage.name)\nAdjust \(missingRequirements.count) joints" |
| 239 | + } |
| 240 | + } |
| 241 | + |
| 242 | + func reset() { |
| 243 | + currentReps = 0 |
| 244 | + currentStageIndex = 0 |
| 245 | + currentStage = exercise.stages.first?.name ?? "" |
| 246 | + // Initialize with first stage feedback only if feedback is not hidden |
| 247 | + if !exercise.hideFeedback, let firstStage = exercise.stages.first { |
| 248 | + feedbackMessage = "🔴 \(firstStage.name)\nGet into position" |
| 249 | + } else { |
| 250 | + feedbackMessage = "" |
| 251 | + } |
| 252 | + isInTransition = false |
| 253 | + currentAngles.removeAll() |
| 254 | + incorrectJoints.removeAll() |
| 255 | + } |
| 256 | + |
| 257 | + // Debug helper |
| 258 | + func getCurrentAngles() -> String { |
| 259 | + return currentAngles.map { joint, angle in |
| 260 | + "\(joint.description): \(Int(angle))°" |
| 261 | + }.joined(separator: ", ") |
| 262 | + } |
| 263 | +} |
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