Added stroke that depends on product freshness

app/src/main/java/org/foxarmy/barcodescannerforemployees/views/ProductView.kt

@@ -2,13 +2,21 @@ package org.foxarmy.barcodescannerforemployees.views
 
 import android.app.Activity
 import android.content.Context
+import android.graphics.Color
+import android.graphics.drawable.GradientDrawable
+import android.os.Build
 import android.util.AttributeSet
+import android.util.Log
 import android.view.LayoutInflater
 import android.widget.ImageView
 import android.widget.LinearLayout
 import android.widget.TextView
+import androidx.annotation.RequiresApi
 import androidx.constraintlayout.widget.ConstraintLayout
 import androidx.core.content.ContextCompat
+import androidx.core.graphics.blue
+import androidx.core.graphics.green
+import androidx.core.graphics.red
 import org.foxarmy.barcodescannerforemployees.DBStorageController
 import org.foxarmy.barcodescannerforemployees.R
 import org.foxarmy.barcodescannerforemployees.dataclasses.AbstractProduct
@@ -16,6 +24,9 @@ import org.foxarmy.barcodescannerforemployees.dataclasses.Product
 import org.foxarmy.barcodescannerforemployees.getActivity
 import org.foxarmy.barcodescannerforemployees.getImageUri
 import java.io.File
+import java.time.LocalDate
+import java.time.Period
+import java.time.format.DateTimeFormatter
 
 class ProductView: LinearLayout {
     var product: Product = Product()
@@ -35,6 +46,7 @@ class ProductView: LinearLayout {
         inflater.inflate(R.layout.product_view, this)
     }
 
+    @RequiresApi(Build.VERSION_CODES.O)
     constructor(activity: Activity, context: Context, product: Product) : super(context) {
         this.product = product
         this.activity = activity
@@ -48,9 +60,15 @@ class ProductView: LinearLayout {
         productCategoryView = findViewById(R.id.categoryView)
         productLifeSpan = findViewById(R.id.dateSpan)
 
+        findViewById<ConstraintLayout>(R.id.productLayout).setOnLongClickListener {
+            updateStroke()
+            true
+        }
+
         update()
     }
 
+    @RequiresApi(Build.VERSION_CODES.O)
     fun update () {
         val linkedAbstractProduct: AbstractProduct = DBStorageController(activity).findAbstractProductById(DBStorageController(activity).readableDatabase, product.abstractProductId)!!
 
@@ -66,12 +84,66 @@ class ProductView: LinearLayout {
         productCategoryView.text = DBStorageController(activity).getCategoryNameById(DBStorageController(activity).readableDatabase, linkedAbstractProduct.category)
         productLifeSpan.text = "${product.dateOfProduction}-${product.dateOfExpiry}"
 
-        this.background = ContextCompat.getDrawable(context, if (isProductSelected) R.drawable.outline_selected else R.drawable.outline)
+        updateStroke()
+    }
 
-        findViewById<ConstraintLayout>(R.id.productLayout).setOnLongClickListener {
-            isProductSelected = !isProductSelected
-            this.background = ContextCompat.getDrawable(context, if (isProductSelected) R.drawable.outline_selected else R.drawable.outline)
-            true
+    @RequiresApi(Build.VERSION_CODES.O)
+    fun updateStroke() {
+         if (isProductSelected) {
+             this.background = ContextCompat.getDrawable(context, R.drawable.outline_selected)
+        } else {
+            this.background = ContextCompat.getDrawable(context, R.drawable.outline)
+             val color = evaluateColor()
+            (this.background.current as GradientDrawable).setStroke(3, color)
         }
     }
+
+    @RequiresApi(Build.VERSION_CODES.O)
+    fun evaluateColor(): Int {
+        val dateFormatter: DateTimeFormatter =  DateTimeFormatter.ofPattern("d.M.yyyy")
+
+
+        val fresh = LocalDate.parse(product.dateOfProduction, dateFormatter)
+        val expired = LocalDate.parse(product.dateOfExpiry, dateFormatter)
+
+        val shelfLife = Period.between(fresh, expired).days
+
+        val today = LocalDate.parse(LocalDate.now().format(dateFormatter), dateFormatter)
+        Log.d("QWERTYUIOP", today.toString())
+
+        val daysBeforeExpiry = Period.between(today, expired).days
+
+        val freshnessPercentage: Double = daysBeforeExpiry / shelfLife.toDouble()
+        Log.d("QWERTYUIOP", "$daysBeforeExpiry, $shelfLife, $freshnessPercentage")
+
+        return calculateFreshnessGradient(freshnessPercentage)
+    }
+
+    fun calculateFreshnessGradient(percentage: Double): Int {
+        val startColor = ContextCompat.getColor(context, if (percentage > 0.5) R.color.full_freshness else R.color.half_freshness)
+        val endColor = ContextCompat.getColor(context, if (percentage > 0.5) R.color.half_freshness else R.color.expired_freshness)
+
+        val gradientPosition = 1 - if (percentage > 0.5) (percentage - 0.5) * 2 else percentage * 2
+
+        Log.d("QWERTYUIOP", "GP: $gradientPosition")
+
+
+        val red = (startColor.red + gradientPosition * (endColor.red - startColor.red )).toInt()
+        val green = (startColor.green  + gradientPosition * (endColor.green - startColor.green)).toInt()
+        val blue = (startColor.blue + gradientPosition * (endColor.blue - startColor.blue)).toInt()
+
+        var redHex = java.lang.Integer.toHexString(red)
+        if (redHex.length == 1) redHex = "0$redHex"
+
+        var greenHex = java.lang.Integer.toHexString(green)
+        if (greenHex.length == 1) greenHex = "0$greenHex"
+
+        var blueHex = java.lang.Integer.toHexString(blue)
+        if (blueHex.length == 1 ) blueHex = "0$blueHex"
+
+
+        val colorString = "#$redHex$greenHex$blueHex"
+        Log.d("QWERTYUIOP", "Color: $colorString\nRGB:$red:$green:$blue")
+        return Color.parseColor(colorString)
+    }
 }

app/src/main/res/drawable/outline.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle" >
     <solid android:color="@android:color/transparent" />
-    <stroke android:width="1dip" android:color="#28283f"/>
+    <stroke android:width="1dip" android:color="#28283f" android:id="@+id/test"/>
     <padding android:bottom="1dp" android:top="1dp" android:left="1dp" android:right="1dp" />
 </shape>

app/src/main/res/values/colors.xml

@@ -10,4 +10,8 @@
     <color name="light_blue_A200">#FF40C4FF</color>
     <color name="light_blue_A400">#FF00B0FF</color>
     <color name="black_overlay">#66000000</color>
+
+    <color name="full_freshness">#5AFF30</color>
+    <color name="half_freshness">#FFF200</color>
+    <color name="expired_freshness">#ff0000</color>
 </resources>