expose channel settings via an URL

TODO.md

@@ -1,12 +1,14 @@
 # High priority
 MVP features required for first public alpha 
 
+* make chat pretty and functional
 * let user set name and shortname
+* take video
+
 * stop scan when we start the service
 * set the radio by using the service
 * startforegroundservice only if we have a valid radio
 * if no radio is selected, launch app on the radio select screen
-* provide gps location for devices that don't have it
 * let user send texts
 * when we select a new radio, restart the service
 * show bt scan progress centered and towards the bottom of the screen
@@ -17,14 +19,12 @@ MVP features required for first public alpha
 * on onStop somehow stop the BT scan (to prevent burning battery)
 * add alphatest screen at boot
 * have the foreground service's notification show a summary of network status, add (individually maskable) notifications for received texts or new positions
-* prompt user to turnon bluetooth and bind
 * test bt boot behavior
 * fix BT device scanning - make a setup screen
 * when a text arrives, move that node info card to the bottom on the window - put the text to the left of the card.  with a small arrow/distance/shortname
 * let the user type texts somewhere
 * include a background behind our cloud graphics, so redraws work properly
 * show direction and distance on the nodeinfo cards
-* show radio config screen, it shows past channels (and the current one)
 * use this for preferences? https://developer.android.com/guide/topics/ui/settings/
 * do setOwner every time we connect to the radio, use our settings, radio should ignore if unchanged
 * send location data for devices that don't have a GPS - https://developer.android.com/training/location/change-location-settings
@@ -122,4 +122,6 @@ Don't leave device discoverable.  Don't let unpaired users do things with device
 * all chat in the app defaults to group chat
 * start bt receive on boot
 * warn user to bt pair
-* suppress logging output if running a release build (required for play store)
+* suppress logging output if running a release build (required for play store)
+* provide gps location for devices that don't have it
+* prompt user to turnon bluetooth and bind

app/src/main/AndroidManifest.xml

@@ -102,7 +102,7 @@
                 <data
                     android:scheme="http"
                     android:host="www.meshtastic.org"
-                    android:pathPrefix="/s" />
+                    android:pathPrefix="/c/" />
             </intent-filter>
         </activity>
 

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

@@ -20,6 +20,7 @@ import com.geeksville.mesh.service.*
 import com.geeksville.mesh.ui.MeshApp
 import com.geeksville.mesh.ui.TextMessage
 import com.geeksville.mesh.ui.UIState
+import com.geeksville.mesh.ui.getInitials
 import com.geeksville.util.exceptionReporter
 import com.google.android.gms.auth.api.signin.GoogleSignIn
 import com.google.android.gms.auth.api.signin.GoogleSignInAccount
@@ -152,7 +153,8 @@ class MainActivity : AppCompatActivity(), Logging,
 
     private fun setOwner() {
         // Note: we are careful to not set a new unique ID
-        meshService!!.setOwner(null, "Kevin Xter", "kx")
+        val name = UIState.ownerName.value
+        meshService!!.setOwner(null, name, getInitials(name))
     }
 
     private fun sendTestPackets() {
@@ -263,12 +265,25 @@ class MainActivity : AppCompatActivity(), Logging,
         }
     }
 
+    /// Read the config bytes from the radio so we can show them in our GUI, the radio's copy is ground truth
+    private fun readRadioConfig() {
+        val bytes = meshService!!.radioConfig
+
+        val config = MeshProtos.RadioConfig.parseFrom(bytes)
+        UIState.radioConfig.value = config
+
+        debug("Read config from radio, channel URL ${UIState.channelUrl}")
+    }
+
     /// Called when we gain/lose a connection to our mesh radio
     private fun onMeshConnectionChanged(connected: Boolean) {
         UIState.isConnected.value = connected
         debug("connchange ${UIState.isConnected.value}")
         if (connected) {
-            // everytime the radio reconnects, we slam in our current owner data
+            // always get the current radio config when we connect
+            readRadioConfig()
+
+            // everytime the radio reconnects, we slam in our current owner data, the radio is smart enough to only broadcast if needed
             setOwner()
         }
     }

app/src/main/java/com/geeksville/mesh/ui/Status.kt

@@ -1,7 +1,9 @@
 package com.geeksville.mesh.ui
 
+import android.util.Base64
 import androidx.compose.Model
 import androidx.compose.mutableStateOf
+import com.geeksville.mesh.MeshProtos
 import com.geeksville.mesh.MeshUser
 import com.geeksville.mesh.NodeInfo
 import com.geeksville.mesh.Position
@@ -72,8 +74,23 @@ object UIState {
     val messages = mutableStateOf(testTexts)
 
     /// Are we connected to our radio device
-    var isConnected = mutableStateOf(false)
+    val isConnected = mutableStateOf(false)
 
+    /// various radio settings (including the channel)
+    val radioConfig = mutableStateOf(MeshProtos.RadioConfig.getDefaultInstance())
+
+    /// our name in hte radio
+    /// Note, we generate owner initials automatically for now
+    val ownerName = mutableStateOf("fixme readfromprefs")
+
+    /// Return an URL that represents the current channel values
+    val channelUrl
+        get(): String {
+            val channelBytes = radioConfig.value.channelSettings.toByteArray()
+            val enc = Base64.encodeToString(channelBytes, Base64.URL_SAFE + Base64.NO_WRAP)
+
+            return "https://www.meshtastic.org/c/$enc"
+        }
 }
 
 /**