Adds PoW Display to notes

app/src/main/java/com/vitorpamplona/amethyst/service/model/Event.kt

@@ -56,6 +56,27 @@ open class Event(
     override fun isTaggedHashes(hashtags: Set<String>) = tags.any { it.getOrNull(0) == "t" && it.getOrNull(1)?.lowercase() in hashtags }
     override fun firstIsTaggedHashes(hashtags: Set<String>) = tags.firstOrNull { it.getOrNull(0) == "t" && it.getOrNull(1)?.lowercase() in hashtags }?.getOrNull(1)
 
+    override fun getPoWRank(): Int {
+        var rank = 0
+        for (i in 0..id.length) {
+            if (id[i] == '0') {
+                rank += 4
+            } else if (id[i] in '4'..'7') {
+                rank += 1
+                break
+            } else if (id[i] in '2'..'3') {
+                rank += 2
+                break
+            } else if (id[i] == '1') {
+                rank += 3
+                break
+            } else {
+                break
+            }
+        }
+        return rank
+    }
+
     override fun getReward(): BigDecimal? {
         return try {
             tags.filter { it.firstOrNull() == "reward" }.mapNotNull { BigDecimal(it.getOrNull(1)) }.firstOrNull()

app/src/main/java/com/vitorpamplona/amethyst/service/model/EventInterface.kt

@@ -32,4 +32,5 @@ interface EventInterface {
     fun hashtags(): List<String>
 
     fun getReward(): BigDecimal?
+    fun getPoWRank(): Int
 }

app/src/main/java/com/vitorpamplona/amethyst/ui/note/NoteCompose.kt

@@ -36,6 +36,7 @@ import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.Dp
 import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
 import androidx.core.content.ContextCompat
 import androidx.core.graphics.drawable.toBitmap
 import androidx.core.graphics.get
@@ -308,6 +309,11 @@ fun NoteCompose(
                             if (baseReward != null) {
                                 DisplayReward(baseReward, baseNote, account, navController)
                             }
+
+                            val pow = noteEvent.getPoWRank()
+                            if (pow > 1) {
+                                DisplayPoW(pow)
+                            }
                         }
                     }
 
@@ -567,6 +573,20 @@ fun DisplayUncitedHashtags(
     }
 }
 
+@Composable
+fun DisplayPoW(
+    pow: Int
+) {
+    Text(
+        "PoW-$pow",
+        color = MaterialTheme.colors.primary.copy(
+            alpha = 0.52f
+        ),
+        fontSize = 14.sp,
+        fontWeight = FontWeight.Bold
+    )
+}
+
 @Composable
 fun DisplayReward(
     baseReward: BigDecimal,