feat: show per-message SNR, RSSI and hop count (#2040)

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Co-authored-by: Ben Meadors <benmmeadors@gmail.com>

app/src/main/java/com/geeksville/mesh/DataPacket.kt

@@ -59,6 +59,9 @@ data class DataPacket(
     var hopLimit: Int = 0,
     var channel: Int = 0, // channel index
     var wantAck: Boolean = true, // If true, the receiver should send an ack back
+    var hopStart: Int = 0,
+    var snr: Float = 0f,
+    var rssi: Int = 0,
 ) : Parcelable {
 
     /**
@@ -107,6 +110,9 @@ data class DataPacket(
             null
         }
 
+    val hopsAway: Int
+        get() = if (hopStart == 0 || hopLimit > hopStart) -1 else hopStart - hopLimit
+
     // Autogenerated comparision, because we have a byte array
 
     constructor(parcel: Parcel) : this(
@@ -120,8 +126,12 @@ data class DataPacket(
         parcel.readInt(),
         parcel.readInt(),
         parcel.readInt() == 1,
+        parcel.readInt(),
+        parcel.readFloat(),
+        parcel.readInt(),
     )
 
+    @Suppress("CyclomaticComplexMethod")
     override fun equals(other: Any?): Boolean {
         if (this === other) return true
         if (javaClass != other?.javaClass) return false
@@ -138,6 +148,9 @@ data class DataPacket(
         if (status != other.status) return false
         if (hopLimit != other.hopLimit) return false
         if (wantAck != other.wantAck) return false
+        if (hopStart != other.hopStart) return false
+        if (snr != other.snr) return false
+        if (rssi != other.rssi) return false
 
         return true
     }
@@ -153,6 +166,9 @@ data class DataPacket(
         result = 31 * result + hopLimit
         result = 31 * result + channel
         result = 31 * result + wantAck.hashCode()
+        result = 31 * result + hopStart
+        result = 31 * result + snr.hashCode()
+        result = 31 * result + rssi
         return result
     }
 
@@ -167,6 +183,9 @@ data class DataPacket(
         parcel.writeInt(hopLimit)
         parcel.writeInt(channel)
         parcel.writeInt(if (wantAck) 1 else 0)
+        parcel.writeInt(hopStart)
+        parcel.writeFloat(snr)
+        parcel.writeInt(rssi)
     }
 
     override fun describeContents(): Int {
@@ -185,6 +204,9 @@ data class DataPacket(
         hopLimit = parcel.readInt()
         channel = parcel.readInt()
         wantAck = parcel.readInt() == 1
+        hopStart = parcel.readInt()
+        snr = parcel.readFloat()
+        rssi = parcel.readInt()
     }
 
     companion object CREATOR : Parcelable.Creator<DataPacket> {