showing due by deltas on the gallery in the goal cells

related to #209

Author: krugerk

BeeSwift/GoalCollectionViewCell.swift

@@ -16,6 +16,15 @@ class GoalCollectionViewCell: UICollectionViewCell {
     let todaytaLabel :BSLabel = BSLabel()
     let thumbnailImageView = GoalImageView(isThumbnail: true)
     let safesumLabel :BSLabel = BSLabel()
+    
+    lazy var dueByDeltasLabel: BSLabel = {
+        let label = BSLabel()
+        label.textAlignment = NSTextAlignment.center
+        label.font = UIFont.beeminder.defaultBoldFont.withSize(13)
+        label.numberOfLines = 0
+        return label
+    }()
+        
     let margin = 8
 
     override init(frame: CGRect) {
@@ -26,6 +35,7 @@ class GoalCollectionViewCell: UICollectionViewCell {
         self.contentView.addSubview(self.todaytaLabel)
         self.contentView.addSubview(self.thumbnailImageView)
         self.contentView.addSubview(self.safesumLabel)
+        self.contentView.addSubview(self.dueByDeltasLabel)
         self.contentView.backgroundColor = .systemBackground
 
         self.slugLabel.font = UIFont.beeminder.defaultFontHeavy
@@ -69,6 +79,12 @@ class GoalCollectionViewCell: UICollectionViewCell {
             make.centerY.equalTo(self.thumbnailImageView.snp.centerY)
             make.right.equalTo(-self.margin)
         }
+        
+        self.dueByDeltasLabel.snp.makeConstraints { (make) -> Void in
+            make.left.equalTo(self.thumbnailImageView.snp.right).offset(5)
+            make.top.equalTo(self.safesumLabel.snp.bottom).offset(6)
+            make.right.equalTo(-self.margin)
+        }
     }
 
     required init?(coder aDecoder: NSCoder) {
@@ -89,5 +105,46 @@ class GoalCollectionViewCell: UICollectionViewCell {
         self.todaytaLabel.text = goal?.todayta == true ? "✓" : ""
         self.safesumLabel.text = goal?.capitalSafesum()
         self.safesumLabel.textColor = goal?.countdownColor ?? UIColor.Beeminder.gray
+        self.dueByDeltasLabel.attributedText = goal?.dueByTableAttributedString
+        self.dueByDeltasLabel.isHidden = goal == nil || goal?.dueByContainsSpecificAmounts == false
+    }
+}
+
+
+private extension Goal {
+    var dueByContainsSpecificAmounts: Bool {
+        self.dueBy.values.map { $0.formattedDelta }
+            .joined(separator: " ")
+            .contains(where: { $0.isNumber })
+    }
+    
+    var dueByTableAttributedString: NSAttributedString {
+        let textAndColor: [(text: String, color: UIColor)] = dueBy
+            .sorted(using: SortDescriptor(\.key))
+            .compactMap({ $0.value.formattedDelta })
+            .map { $0 == "✔" ? "✓" : $0 }
+            .enumerated()
+            .map { offset, element in
+                var color: UIColor {
+                    switch offset {
+                    case 0: return UIColor.Beeminder.SafetyBuffer.orange
+                    case 1: return UIColor.Beeminder.SafetyBuffer.blue
+                    case 2: return UIColor.Beeminder.SafetyBuffer.green
+                    default: return .label.withAlphaComponent(0.8)
+                    }
+                }
+                return (text: element, color: color)
+            }
+        
+        let attrStr = NSMutableAttributedString()
+        
+        textAndColor
+            .map { (text: String, color: UIColor) in
+                NSAttributedString(string: text + " ", attributes: [.foregroundColor: color])
+            }
+            .forEach { attrStr.append($0) }
+        
+        return attrStr
     }
 }
+