From 2b0109468c2f846c8b682da81b8fa9567874e3bb Mon Sep 17 00:00:00 2001
From: Hykilpikonna <me@hydev.org>
Date: Wed, 27 Jan 2021 20:20:41 -0500
Subject: [PATCH] [+] Implement regular math expressions

---
 .../AlarmActivationViewController.swift       |  5 ++
 ProjectClock/Base.lproj/Main.storyboard       |  8 +--
 ProjectClock/MathExpressions.swift            | 55 ++++++++-----------
 ProjectClock/Models.swift                     |  5 +-
 4 files changed, 36 insertions(+), 37 deletions(-)

diff --git a/ProjectClock/AlarmActivationViewController.swift b/ProjectClock/AlarmActivationViewController.swift
index 9b543f5..1028055 100644
--- a/ProjectClock/AlarmActivationViewController.swift
+++ b/ProjectClock/AlarmActivationViewController.swift
@@ -102,6 +102,11 @@ class AlarmActivationViewController: EndEditingOnReturn
         // Initialize alarm
         switch wvm
         {
+        case "Math 1", "Math 2", "Math 3":
+            let q = MathExpProblem(size: Int(wvm[5...5])!)
+            puzzleQuestionLabel.text = "Solve: \(q.prob.replacingOccurrences(of: "**", with: "^"))"
+            puzzleAnswers = [q.ans]
+            puzzleView.show()
         case "Factor":
             initFactorProblem()
             puzzleView.show()
diff --git a/ProjectClock/Base.lproj/Main.storyboard b/ProjectClock/Base.lproj/Main.storyboard
index 699b339..42d14d2 100644
--- a/ProjectClock/Base.lproj/Main.storyboard
+++ b/ProjectClock/Base.lproj/Main.storyboard
@@ -677,10 +677,10 @@
                                 <nil key="textColor"/>
                                 <nil key="highlightedColor"/>
                             </label>
-                            <view hidden="YES" contentMode="scaleToFill" translatesAutoresizingMaskIntoConstraints="NO" id="OMQ-qK-fej" userLabel="factorView">
+                            <view contentMode="scaleToFill" translatesAutoresizingMaskIntoConstraints="NO" id="OMQ-qK-fej" userLabel="factorView">
                                 <rect key="frame" x="20" y="358" width="374" height="126.5"/>
                                 <subviews>
-                                    <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Solve: " lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="CZ0-R6-FDq">
+                                    <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Solve: " lineBreakMode="tailTruncation" numberOfLines="0" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="CZ0-R6-FDq">
                                         <rect key="frame" x="20" y="20" width="334" height="32.5"/>
                                         <fontDescription key="fontDescription" type="system" pointSize="27"/>
                                         <nil key="textColor"/>
@@ -705,7 +705,7 @@
                                     <constraint firstItem="eTb-g7-8x3" firstAttribute="top" secondItem="CZ0-R6-FDq" secondAttribute="bottom" constant="20" id="yME-j6-vSk"/>
                                 </constraints>
                             </view>
-                            <view contentMode="scaleToFill" translatesAutoresizingMaskIntoConstraints="NO" id="Zph-rd-rPI" userLabel="shakeView">
+                            <view hidden="YES" contentMode="scaleToFill" translatesAutoresizingMaskIntoConstraints="NO" id="Zph-rd-rPI" userLabel="shakeView">
                                 <rect key="frame" x="20" y="391" width="374" height="60.5"/>
                                 <subviews>
                                     <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Shake your phone to dismiss" textAlignment="center" lineBreakMode="tailTruncation" numberOfLines="0" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="nK2-jK-GsP">
@@ -723,7 +723,7 @@
                                     <constraint firstItem="nK2-jK-GsP" firstAttribute="top" secondItem="Zph-rd-rPI" secondAttribute="top" constant="20" id="yVq-ID-HNc"/>
                                 </constraints>
                             </view>
-                            <view contentMode="scaleToFill" translatesAutoresizingMaskIntoConstraints="NO" id="NmX-iJ-1D0" userLabel="rpsView">
+                            <view hidden="YES" contentMode="scaleToFill" translatesAutoresizingMaskIntoConstraints="NO" id="NmX-iJ-1D0" userLabel="rpsView">
                                 <rect key="frame" x="20" y="338.5" width="374" height="165"/>
                                 <subviews>
                                     <stackView opaque="NO" contentMode="scaleToFill" distribution="fillEqually" translatesAutoresizingMaskIntoConstraints="NO" id="213-rS-oYj">
diff --git a/ProjectClock/MathExpressions.swift b/ProjectClock/MathExpressions.swift
index a1e6c1f..3135942 100644
--- a/ProjectClock/MathExpressions.swift
+++ b/ProjectClock/MathExpressions.swift
@@ -40,11 +40,10 @@ enum MathOperator : String {
     case plus = "+"
     case minus = "-"
     case multiply = "*"
-    case divide = "/"
     case power = "**"
     
     static func random() -> MathOperator {
-        let allMathOperators: [MathOperator] = [.plus, .minus, .multiply, .divide, .power]
+        let allMathOperators: [MathOperator] = [.plus, .minus, .multiply, .power]
         let index = Int(arc4random_uniform(UInt32(allMathOperators.count)))
         
         return allMathOperators[index]
@@ -83,50 +82,42 @@ class MathExpression : CustomStringConvertible {
         return "\(leftString) \(self.op.rawValue) \(rightString)"
     }
     
-    var result : Int? {
+    var result: Int {
         let format = "\(lhs.nsExpressionFormatString) \(op.rawValue) \(rhs.nsExpressionFormatString)"
         let expr = NSExpression(format: format)
-        return expr.expressionValue(with: nil, context: nil) as? Int
+        let result = expr.expressionValue(with: nil, context: nil)
+        return Int(round(result as! Double))
     }
     
     static func random() -> MathExpression {
+        let op: MathOperator = .random()
         let lhs = MathElement.Integer(value: Int(arc4random_uniform(10)))
-        let rhs = MathElement.Integer(value: Int(arc4random_uniform(10)))
+        let rhs = MathElement.Integer(value: Int(arc4random_uniform(op == .power ? 3 : 10)))
         
-        return MathExpression(lhs: lhs, rhs: rhs, op: .random())
+        return MathExpression(lhs: lhs, rhs: rhs, op: op)
     }
 }
 
 /**
  Generate simple problem - 2 expressions
  */
-class AlgProb2  : MathExpression {
-    let a = MathExpression.random()
-    let b = MathExpression.random()
+class MathExpProblem
+{
+    let prob: String
+    let ans: Int
     
-    func getProblem() -> String {
-        return "\(a) + \(b)"
-    }
-    
-    func getAnswer() -> String {
-        return "\(a.result! + b.result!)"
-    }
-}
-
-/**
- Generate simple problem - 3 expressions
- */
-class AlgProb3  : MathExpression {
-    let a = MathExpression.random()
-    let b = MathExpression.random()
-    let c = MathExpression.random()
-    
-    func getProblem() -> String {
-        return "\(a) + \(b) + \(c)"
-    }
-    
-    func getAnswer() -> String {
-        return "\(a.result! + b.result! + c.result!)"
+    init(size: Int)
+    {
+        var expressions: [String] = []
+        var answer = 0
+        for _ in 1...size
+        {
+            let exp = MathExpression.random()
+            expressions.append(exp.description)
+            answer += exp.result
+        }
+        prob = expressions.joined(separator: " + ")
+        ans = answer
     }
 }
 
diff --git a/ProjectClock/Models.swift b/ProjectClock/Models.swift
index 5362127..3741d06 100644
--- a/ProjectClock/Models.swift
+++ b/ProjectClock/Models.swift
@@ -39,9 +39,12 @@ struct WVM: Codable
 
 
 let wvms = [
+    WVM(name: "Shake", desc: "Shake your phone... aggresively!"),
+    WVM(name: "Math 1", desc: "Easy math expression"),
+    WVM(name: "Math 2", desc: "Medium math expression"),
+    WVM(name: "Math 3", desc: "Hard math expression"),
     WVM(name: "Factor", desc: "Factor a binomial"),
     WVM(name: "RPS", desc: "Win a game of rock paper scissors"),
-    WVM(name: "Shake", desc: "Shake your phone... aggresively!"),
     //WVM(name: "Smash", desc: "It'll never turn off"),
     //WVM(name: "Walk", desc: "Walk a few steps"),
     //WVM(name: "Jump", desc: "Make a few jumps")