feat: add sharing view

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

@@ -308,6 +308,7 @@ class MainActivity : AppCompatActivity(), Logging {
                         }
                     } catch (e: SerializationException) {
                         debug("Failed to decode JSON: ${e.message}; falling back to default message")
+                        shareMessages(text)
                     }
                 }
             }
@@ -648,6 +649,13 @@ class MainActivity : AppCompatActivity(), Logging {
         }
     }
 
+    private fun shareMessages(message: String?) {
+        model.setCurrentTab(0)
+        if (message != null) {
+            supportFragmentManager.navigateToShareMessage(message)
+        }
+    }
+
     override fun onCreateOptionsMenu(menu: Menu): Boolean {
         // Inflate the menu; this adds items to the action bar if it is present.
         menuInflater.inflate(R.menu.menu_main, menu)

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

@@ -0,0 +1,130 @@
+package com.geeksville.mesh.ui
+
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.compose.foundation.layout.PaddingValues
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.lazy.items
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.unit.dp
+import androidx.core.os.bundleOf
+import androidx.fragment.app.FragmentManager
+import androidx.fragment.app.activityViewModels
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import com.geeksville.mesh.android.Logging
+import com.geeksville.mesh.R
+import com.geeksville.mesh.databinding.ShareFragmentBinding
+import com.geeksville.mesh.model.Contact
+import com.geeksville.mesh.model.UIViewModel
+import com.geeksville.mesh.ui.theme.AppTheme
+import dagger.hilt.android.AndroidEntryPoint
+
+internal fun FragmentManager.navigateToShareMessage(message: String) {
+    val shareFragment = ShareFragment().apply {
+        arguments = bundleOf("message" to message)
+    }
+    beginTransaction()
+        .add(R.id.mainActivityLayout, shareFragment)
+        .addToBackStack(null)
+        .commit()
+}
+
+@AndroidEntryPoint
+class ShareFragment : ScreenFragment("Messages"), Logging {
+
+    private val model: UIViewModel by activityViewModels()
+    private var _binding: ShareFragmentBinding? = null
+
+    // This property is only valid between onCreateView and onDestroyView.
+    private val binding get() = _binding!!
+
+    private val contacts get() = model.contactList.value
+    private var selectedContact = mutableStateOf("")
+
+    private fun shareMessage(contact: Contact) {
+        debug("calling MessagesFragment filter:${contact.contactKey}")
+        parentFragmentManager.navigateToPreInitMessages(
+            contact.contactKey,
+            contact.longName,
+            arguments?.getString("message").toString()
+        )
+    }
+
+    private fun onClick(contact: Contact) {
+        if (selectedContact.value == contact.contactKey) {
+            selectedContact.value = ""
+            binding.shareButton.isEnabled = false
+        } else {
+            selectedContact.value = contact.contactKey
+            binding.shareButton.isEnabled = true
+        }
+    }
+
+    override fun onCreateView(
+        inflater: LayoutInflater,
+        container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View {
+        _binding = ShareFragmentBinding.inflate(inflater, container, false)
+        return binding.root
+    }
+
+    @Suppress("LongMethod", "CyclomaticComplexMethod")
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        binding.toolbar.setNavigationOnClickListener {
+            parentFragmentManager.popBackStack()
+        }
+
+        binding.shareButton.isEnabled = false
+
+        binding.shareButton.setOnClickListener {
+            debug("User clicked shareButton")
+            val contact = contacts.find { c -> c.contactKey == selectedContact.value }
+            if (contact != null) {
+                shareMessage(contact)
+            }
+        }
+
+        binding.contactListView.setContent {
+            val contacts by model.contactList.collectAsStateWithLifecycle()
+            AppTheme {
+                ShareContactListView(
+                    contacts = contacts,
+                    selectedContact = selectedContact.value,
+                    onClick = ::onClick,
+                )
+            }
+        }
+    }
+}
+
+
+@Composable
+fun ShareContactListView(
+    contacts: List<Contact>,
+    selectedContact: String,
+    onClick: (Contact) -> Unit,
+) {
+    LazyColumn(
+        modifier = Modifier
+            .fillMaxSize(),
+        contentPadding = PaddingValues(6.dp),
+    ) {
+        items(contacts, key = { it.contactKey }) { contact ->
+            val selected = contact.contactKey == selectedContact
+            ContactItem(
+                contact = contact,
+                selected = selected,
+                onClick = { onClick(contact) },
+                onLongClick = {},
+            )
+        }
+    }
+}

app/src/main/res/layout/share_fragment.xml

@@ -0,0 +1,63 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="@color/colorAdvancedBackground">
+
+    <com.google.android.material.appbar.MaterialToolbar
+        android:id="@+id/toolbar"
+        style="@style/MyToolbar"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:background="@color/toolbarBackground"
+        android:title="@string/share_to"
+        app:title="@string/share_to"
+        app:layout_constraintHeight_min="?attr/actionBarSize"
+        app:layout_constraintTop_toTopOf="parent"
+        app:navigationIcon="?android:attr/homeAsUpIndicator"
+        app:titleMargin="4dp" />
+
+    <androidx.compose.ui.platform.ComposeView
+        android:id="@+id/contactListView"
+        android:layout_width="0dp"
+        android:layout_height="0dp"
+        android:layout_margin="8dp"
+        android:contentDescription="@string/text_messages"
+        app:layout_constraintBottom_toTopOf="@+id/quickChatView"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/toolbar">
+
+    </androidx.compose.ui.platform.ComposeView>
+
+    <HorizontalScrollView
+        android:id="@+id/quickChatView"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="8dp"
+        android:layout_marginEnd="8dp"
+        android:layout_marginBottom="8dp"
+        app:layout_constraintBottom_toTopOf="@+id/shareButton"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent">
+
+        <LinearLayout
+            android:id="@+id/quickChatLayout"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:orientation="horizontal" />
+    </HorizontalScrollView>
+
+
+    <ImageButton
+        android:id="@+id/shareButton"
+        android:layout_width="match_parent"
+        android:layout_height="64dp"
+        android:contentDescription="@string/share_message"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:srcCompat="@drawable/ic_twotone_send_24" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>

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

@@ -295,6 +295,8 @@
     <string name="fair">Fair</string>
     <string name="good">Good</string>
     <string name="none_quality">None</string>
+    <string name="share_to">Share to…</string>
+    <string name="share_message">Share message</string>
     <string name="signal">Signal</string>
     <string name="signal_quality">Signal Quality</string>
     <string name="traceroute_log">Traceroute Log</string>