adds screen load delay (1s) based on version sum (#77)

EmpowerPlant/CartViewController.swift

@@ -54,6 +54,7 @@ class CartViewController: UIViewController, UITableViewDelegate, UITableViewData
         ])
 
         configureNavigationItems()
+        checkRelease()
 
         // TODO: make this 'total' appear in a UI element
         print("CartViewController | TOTAL", ShoppingCart.instance.total)

EmpowerPlant/EmpowerPlantViewController.swift

@@ -52,7 +52,8 @@ class EmpowerPlantViewController: UIViewController {
         readCurrentDirectory()
         performLongFileOperation()
         processProducts()
-
+        checkRelease()
+
 
         NotificationCenter.default.addObserver(forName: modifiedDBNotificationName, object: nil, queue: nil) { _ in
             self.getAllProductsFromDb()

EmpowerPlant/Utils.swift

@@ -22,3 +22,20 @@ public func wipeDB() {
         return
     }
 }
+
+/** Add a delay based on current version. */
+public func checkRelease() {
+    guard let versionString = Bundle.main.infoDictionary?["CFBundleShortVersionString"] as? String else {
+        print("failed to read bundle version, not sleeping")
+        return
+    }
+
+    // as a workaround to auto-incremented build numbers, we just calculate the integer sum of all segments
+    // of the semantic version, e.g. 0.0.28 -> 0+0+28 = 28 -> sleep, 0.0.29 -> 0+0+29 = 29 -> no sleep
+    let versionSum = versionString.components(separatedBy: ".").compactMap { Int($0) }.reduce(0, +)
+
+    if versionSum % 2 == 0 {
+        print("version sum is even, adding 1s sleep")
+        sleep(1) // sleep takes seconds, not ms
+    }
+}