Identities: add deletion and fix sync issues

- Deletion works and clear the corresponding keystore entries.
- No more sync issues with the listing when creating/updating/deleting.

app/src/main/java/dev/lowrespalmtree/comet/Identities.kt

@@ -5,6 +5,7 @@ import android.security.keystore.KeyProperties
 import android.util.Log
 import androidx.room.*
 import java.security.KeyPairGenerator
+import java.security.KeyStore
 
 object Identities {
     @Entity
@@ -43,6 +44,9 @@ object Identities {
 
         @Query("SELECT * FROM IdentityUsage WHERE :identityId = identityId")
         suspend fun getUsagesFor(identityId: Int): List<IdentityUsage>
+
+        @Delete
+        suspend fun delete(vararg identities: Identity)
     }
 
     suspend fun insert(key: String, name: String? = null): Long =
@@ -57,6 +61,14 @@ object Identities {
     suspend fun update(vararg identities: Identity) =
         Database.INSTANCE.identityDao().update(*identities)
 
+    suspend fun delete(vararg identities: Identity) {
+        for (identity in identities) {
+            if (identity.key.isNotEmpty())
+                deleteClientCert(identity.key)
+        }
+        Database.INSTANCE.identityDao().delete(*identities)
+    }
+
     fun generateClientCert(alias: String) {
         val algo = KeyProperties.KEY_ALGORITHM_RSA
         val kpg = KeyPairGenerator.getInstance(algo, "AndroidKeyStore")
@@ -69,5 +81,16 @@ object Identities {
         Log.i(TAG, "generateClientCert: key pair with alias \"$alias\" has been generated")
     }
 
+    private fun deleteClientCert(alias: String) {
+        val keyStore = KeyStore.getInstance("AndroidKeyStore").also { it.load(null) }
+        Log.i(TAG, keyStore.aliases().toList().joinToString { it })
+        if (keyStore.containsAlias(alias)) {
+            keyStore.deleteEntry(alias)
+            Log.i(TAG, "deleteClientCert: deleted entry with alias \"$alias\"")
+        } else {
+            Log.i(TAG, "deleteClientCert: no such alias \"$alias\"")
+        }
+    }
+
     private const val TAG = "Identities"
 }

app/src/main/java/dev/lowrespalmtree/comet/IdentitiesAdapter.kt

@@ -2,6 +2,7 @@ package dev.lowrespalmtree.comet
 
 import android.annotation.SuppressLint
 import android.view.LayoutInflater
+import android.view.View
 import android.view.ViewGroup
 import androidx.recyclerview.widget.RecyclerView
 import dev.lowrespalmtree.comet.Identities.Identity
@@ -14,6 +15,7 @@ class IdentitiesAdapter(private val listener: Listener) :
 
     interface Listener {
         fun onIdentityClick(identity: Identity)
+        fun onIdentityLongClick(identity: Identity, view: View)
     }
 
     override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder =
@@ -29,7 +31,13 @@ class IdentitiesAdapter(private val listener: Listener) :
         val item = identities[position]
         holder.binding.labelText.text = item.name.orEmpty()
         holder.binding.keyText.text = item.key
-        holder.binding.container.setOnClickListener { listener.onIdentityClick(item) }
+        holder.binding.container.setOnClickListener {
+            listener.onIdentityClick(item)
+        }
+        holder.binding.container.setOnLongClickListener {
+            listener.onIdentityLongClick(item, holder.itemView);
+            true
+        }
     }
 
     override fun getItemCount(): Int = identities.size

app/src/main/java/dev/lowrespalmtree/comet/IdentitiesFragment.kt

@@ -4,6 +4,7 @@ import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import android.widget.PopupMenu
 import androidx.fragment.app.Fragment
 import androidx.fragment.app.viewModels
 import androidx.lifecycle.MutableLiveData
@@ -13,6 +14,7 @@ import androidx.recyclerview.widget.DividerItemDecoration
 import androidx.recyclerview.widget.LinearLayoutManager
 import dev.lowrespalmtree.comet.Identities.Identity
 import dev.lowrespalmtree.comet.databinding.FragmentIdentitiesBinding
+import dev.lowrespalmtree.comet.utils.confirm
 import dev.lowrespalmtree.comet.utils.toast
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
@@ -50,6 +52,32 @@ class IdentitiesFragment : Fragment(), IdentitiesAdapter.Listener, IdentityDialo
         IdentityDialog(requireContext(), identity, this).show()
     }
 
+    override fun onIdentityLongClick(identity: Identity, view: View) {
+        PopupMenu(requireContext(), view)
+            .apply {
+                menuInflater.inflate(R.menu.identity, this.menu)
+                setOnMenuItemClickListener { item ->
+                    when (item.itemId) {
+                        R.id.item_edit -> {
+                            IdentityDialog(
+                                requireContext(),
+                                identity,
+                                this@IdentitiesFragment
+                            ).show()
+                        }
+                        R.id.item_delete -> {
+                            confirm(requireContext(), R.string.confirm_identity_delete) {
+                                vm.deleteIdentity(identity)
+                            }
+                        }
+                        else -> {}
+                    }
+                    true
+                }
+            }
+            .show()
+    }
+
     override fun onSaveIdentity(identity: Identity) {
         vm.saveIdentity(identity)
     }
@@ -57,7 +85,10 @@ class IdentitiesFragment : Fragment(), IdentitiesAdapter.Listener, IdentityDialo
     private fun openNewIdentityEditor() {
         toast(requireContext(), R.string.generating_keypair)
         vm.newIdentity.observe(viewLifecycleOwner) { identity ->
+            if (identity == null)
+                return@observe
             vm.newIdentity.removeObservers(viewLifecycleOwner)
+            vm.newIdentity.value = null
             IdentityDialog(requireContext(), identity, this).show()
         }
         vm.createNewIdentity()
@@ -74,16 +105,25 @@ class IdentitiesFragment : Fragment(), IdentitiesAdapter.Listener, IdentityDialo
                 val newIdentityId = Identities.insert(alias)
                 newIdentity.postValue(Identities.get(newIdentityId))
             }
+                .invokeOnCompletion { refreshIdentities() }
         }
 
         fun refreshIdentities() {
-            viewModelScope.launch(Dispatchers.IO) {
+            viewModelScope.launch(Dispatchers.IO) { identities.postValue(Identities.getAll()) }
-                identities.postValue(Identities.getAll())
-            }
         }
 
         fun saveIdentity(identity: Identity) {
             viewModelScope.launch(Dispatchers.IO) { Identities.update(identity) }
+                .invokeOnCompletion { refreshIdentities() }
         }
+
+        fun deleteIdentity(identity: Identity) {
+            viewModelScope.launch(Dispatchers.IO) { Identities.delete(identity) }
+                .invokeOnCompletion { refreshIdentities() }
+        }
+    }
+
+    companion object {
+        private const val TAG = "IdentitiesFragment"
     }
 }

app/src/main/java/dev/lowrespalmtree/comet/IdentityDialog.kt

@@ -18,7 +18,7 @@ class IdentityDialog(
 
     fun show() {
         binding = DialogIdentityBinding.inflate(LayoutInflater.from(context))
-        binding.labelInput.setText(identity.name)
+        binding.labelInput.setText(identity.name.orEmpty())
         binding.aliasText.text = identity.key
         AlertDialog.Builder(context)
             .setTitle(R.string.edit_identity)

app/src/main/java/dev/lowrespalmtree/comet/IdentityEditorFragment.kt

@@ -1,41 +0,0 @@
-package dev.lowrespalmtree.comet
-
-import android.os.Bundle
-import androidx.fragment.app.viewModels
-import androidx.lifecycle.MutableLiveData
-import androidx.lifecycle.ViewModel
-import androidx.lifecycle.viewModelScope
-import androidx.preference.EditTextPreference
-import androidx.preference.PreferenceFragmentCompat
-import dev.lowrespalmtree.comet.Identities.Identity
-import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.launch
-import kotlin.coroutines.coroutineContext
-
-class IdentityEditorFragment : PreferenceFragmentCompat() {
-    private val vm: IdentityEditorViewModel by viewModels()
-    private lateinit var namePref: EditTextPreference
-
-    override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
-        setPreferencesFromResource(R.xml.identity_preferences, rootKey)
-        namePref = findPreference<EditTextPreference>("name")!!
-
-//        vm.identity.observe(viewLifecycleOwner) {
-//            namePref.apply {
-//                // TODO
-//            }
-//        }
-//
-//        arguments?.getLong("id")?.also { vm.loadIdentity(it) }
-    }
-
-    class IdentityEditorViewModel : ViewModel() {
-        val identity: MutableLiveData<Identity> by lazy { MutableLiveData<Identity>() }
-
-        fun loadIdentity(id: Long) {
-            viewModelScope.launch(Dispatchers.IO) {
-                identity.postValue(Identities.get(id))
-            }
-        }
-    }
-}

app/src/main/java/dev/lowrespalmtree/comet/utils/Ui.kt

@@ -1,10 +1,14 @@
 package dev.lowrespalmtree.comet.utils
 
+import android.app.AlertDialog
 import android.content.Context
 import android.util.TypedValue
+import android.view.LayoutInflater
 import android.widget.Toast
 import androidx.annotation.AttrRes
+import androidx.annotation.StringRes
 import dev.lowrespalmtree.comet.R
+import dev.lowrespalmtree.comet.databinding.DialogConfirmBinding
 
 fun toast(context: Context, stringId: Int, length: Int = Toast.LENGTH_SHORT) =
     Toast.makeText(context, stringId, length).show()
@@ -16,3 +20,14 @@ fun getDrawableFromAttr(context: Context, @AttrRes attr: Int) =
 
 fun getFancySelectBgRes(context: Context) =
     getDrawableFromAttr(context, R.attr.selectableItemBackground)
+
+fun confirm(context: Context, @StringRes prompt: Int, onOk: () -> Unit) {
+    val binding = DialogConfirmBinding.inflate(LayoutInflater.from(context))
+    binding.textView.setText(prompt)
+    AlertDialog.Builder(context)
+        .setTitle(R.string.confirm)
+        .setView(binding.root)
+        .setPositiveButton(android.R.string.ok) { _, _ -> onOk() }
+        .create()
+        .show()
+}

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

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:orientation="vertical"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <TextView
+        android:id="@+id/text_view"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_margin="16sp" />
+
+</LinearLayout>

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

@@ -3,6 +3,4 @@
     android:id="@+id/text_view"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
-    style="@style/CometText"
+    style="@style/CometLink" />
-    android:textColor="@color/link"
-    android:textIsSelectable="false" />

app/src/main/res/menu/identity.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:id="@+id/item_edit" android:title="@string/edit" />
+    <item android:id="@+id/item_delete" android:title="@string/delete" />
+</menu>

app/src/main/res/navigation/main.xml

@@ -31,16 +31,7 @@
     <fragment
         android:id="@+id/identitiesFragment"
         android:name="dev.lowrespalmtree.comet.IdentitiesFragment"
-        android:label="IdentitiesFragment" >
+        android:label="IdentitiesFragment" />
-        <action
-            android:id="@+id/action_identitiesFragment_to_identityEditorFragment"
-            app:destination="@id/identityEditorFragment" />
-    </fragment>
-
-    <fragment
-        android:id="@+id/identityEditorFragment"
-        android:name="dev.lowrespalmtree.comet.IdentityEditorFragment"
-        android:label="IdentityEditorFragment" />
 
     <fragment
         android:id="@+id/settingsFragment"

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

@@ -14,7 +14,7 @@
     <color name="url_bar">#002b36</color>
     <color name="url_bar_loading">#fdf6e3</color>
     <!--
-    Based on Solarized
+    Based on Solarized - https://ethanschoonover.com/solarized/
     SOLARIZED HEX     16/8 TERMCOL  XTERM/HEX   L*A*B      RGB         HSB
     base03    #002b36  8/4 brblack  234 #1c1c1c 15 -12 -12   0  43  54 193 100  21
     base02    #073642  0/4 black    235 #262626 20 -12 -12   7  54  66 192  90  26

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

@@ -1,5 +1,7 @@
 <resources>
-    <string name="app_name">Comet</string>
+    <string name="app_name" translatable="false">Comet</string>
+    <string name="todo" translatable="false">TODO</string>
+
     <string name="error_alert_title">Error</string>
     <string name="url">URL</string>
     <string name="settings">Settings</string>
@@ -11,7 +13,6 @@
     <string name="pref_home_set">Set last visited page as home page</string>
     <string name="no_current_url">No current URL.</string>
 
-
     <!-- Preference Protocol -->
     <string name="pref_protocol_header">Protocol</string>
     <string name="pref_connection_timeout_title">Connection timeout (seconds)</string>
@@ -39,6 +40,9 @@
     <string name="generating_keypair">Generating client certificate…</string>
     <string name="identity_alias_title">Keystore reference</string>
     <string name="edit_identity">Edit identity</string>
-
+    <string name="delete">Delete</string>
+    <string name="confirm">Confirm</string>
+    <string name="confirm_identity_delete">Are you sure you want to delete this identity? The client certificate cannot be retrieved afterwards.</string>
+    <string name="edit">Edit</string>
 
 </resources>

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

@@ -9,4 +9,9 @@
         <item name="android:paddingBottom">4dp</item>
         <item name="android:textIsSelectable">true</item>
     </style>
+    <style name="CometLink" parent="CometText">
+        <item name="android:textColor">@color/link</item>
+        <item name="android:textIsSelectable">false</item>
+        <item name="android:background">?attr/selectableItemBackground</item>
+    </style>
 </resources>