Get rid of explicit Git server protocol (#1054)

* Double check Git server protocol

Ensure that the Git server protocol is not at odds with the URL scheme.

Also move the Protocol switches below the URL to make it clear that the
URL should be entered first.

* Remove protocol selection from server config

The protocol is now extracted from the URL, and the authentication mode selection is validated by GitSettings

Signed-off-by: Harsh Shandilya <me@msfjarvis.dev>

* Don't use pref values for auth modes

Signed-off-by: Harsh Shandilya <me@msfjarvis.dev>

* Apply suggestions from code review

Remove now unused protocol mismatch result type

Co-authored-by: Fabian Henneke <FabianHenneke@users.noreply.github.com>

* Simplify migration logic and fix tests

Signed-off-by: Harsh Shandilya <me@msfjarvis.dev>

* Revert "Simplify migration logic and fix tests"

This reverts commit 1c4c4ba5fbc212843cb6b74dd29ac858eaea7582.

* Detect URLs with null scheme as ssh

* Add changelog entry

Signed-off-by: Harsh Shandilya <me@msfjarvis.dev>

Co-authored-by: Harsh Shandilya <me@msfjarvis.dev>
Co-authored-by: Harsh Shandilya <msfjarvis@gmail.com>

8 files changed, 50 insertions, 107 deletions

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 52236278..c375b7ff 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,6 +12,7 @@ All notable changes to this project will be documented in this file.
 ### Changed
 
 -   A descriptive error message is shown if no username is specified in the Git server settings
+-   Remove explicit protocol choice from Git server settings, it is now inferred from your URL
 
 ### Fixed
 
diff --git a/app/src/androidTest/java/com/zeapo/pwdstore/MigrationsTest.kt b/app/src/androidTest/java/com/zeapo/pwdstore/MigrationsTest.kt
index 531ceebf..c66bb215 100644
--- a/app/src/androidTest/java/com/zeapo/pwdstore/MigrationsTest.kt
+++ b/app/src/androidTest/java/com/zeapo/pwdstore/MigrationsTest.kt
@@ -24,6 +24,7 @@ class MigrationsTest {
         assertNull(getString(PreferenceKeys.GIT_REMOTE_USERNAME))
         assertNull(getString(PreferenceKeys.GIT_REMOTE_SERVER))
         assertNull(getString(PreferenceKeys.GIT_REMOTE_LOCATION))
+        assertNull(getString(PreferenceKeys.GIT_REMOTE_PROTOCOL))
     }
 
     @Test
diff --git a/app/src/main/java/com/zeapo/pwdstore/Migrations.kt b/app/src/main/java/com/zeapo/pwdstore/Migrations.kt
index cdf56bb3..7148ad7e 100644
--- a/app/src/main/java/com/zeapo/pwdstore/Migrations.kt
+++ b/app/src/main/java/com/zeapo/pwdstore/Migrations.kt
@@ -75,13 +75,12 @@ private fun migrateToGitUrlBasedConfig(context: Context) {
         remove(PreferenceKeys.GIT_REMOTE_PORT)
         remove(PreferenceKeys.GIT_REMOTE_SERVER)
         remove(PreferenceKeys.GIT_REMOTE_USERNAME)
+        remove(PreferenceKeys.GIT_REMOTE_PROTOCOL)
     }
     if (url == null || GitSettings.updateConnectionSettingsIfValid(
-            newProtocol = protocol,
             newAuthMode = GitSettings.authMode,
             newUrl = url,
             newBranch = GitSettings.branch) != GitSettings.UpdateConnectionSettingsResult.Valid) {
         e { "Failed to migrate to URL-based Git config, generated URL is invalid" }
     }
 }
-
diff --git a/app/src/main/java/com/zeapo/pwdstore/git/GitServerConfigActivity.kt b/app/src/main/java/com/zeapo/pwdstore/git/GitServerConfigActivity.kt
index cd6747f7..5aa34201 100644
--- a/app/src/main/java/com/zeapo/pwdstore/git/GitServerConfigActivity.kt
+++ b/app/src/main/java/com/zeapo/pwdstore/git/GitServerConfigActivity.kt
@@ -32,7 +32,6 @@ class GitServerConfigActivity : BaseGitActivity() {
 
     private val binding by viewBinding(ActivityGitCloneBinding::inflate)
 
-    private lateinit var newProtocol: Protocol
     private lateinit var newAuthMode: AuthMode
 
     override fun onCreate(savedInstanceState: Bundle?) {
@@ -44,24 +43,8 @@ class GitServerConfigActivity : BaseGitActivity() {
         setContentView(binding.root)
         supportActionBar?.setDisplayHomeAsUpEnabled(true)
 
-        newProtocol = GitSettings.protocol
-        binding.protocolGroup.apply {
-            when (newProtocol) {
-                Protocol.Ssh -> check(R.id.protocol_ssh)
-                Protocol.Https -> check(R.id.protocol_https)
-            }
-            addOnButtonCheckedListener { _, checkedId, checked ->
-                if (checked) {
-                    when (checkedId) {
-                        R.id.protocol_https -> newProtocol = Protocol.Https
-                        R.id.protocol_ssh -> newProtocol = Protocol.Ssh
-                    }
-                    updateAuthModeToggleGroup()
-                }
-            }
-        }
-
         newAuthMode = GitSettings.authMode
+
         binding.authModeGroup.apply {
             when (newAuthMode) {
                 AuthMode.SshKey -> check(R.id.auth_mode_ssh_key)
@@ -78,27 +61,25 @@ class GitServerConfigActivity : BaseGitActivity() {
                 }
             }
         }
-        updateAuthModeToggleGroup()
 
         binding.serverUrl.setText(GitSettings.url)
         binding.serverBranch.setText(GitSettings.branch)
 
         binding.saveButton.setOnClickListener {
-            when (GitSettings.updateConnectionSettingsIfValid(
-                newProtocol = newProtocol,
+            when (val updateResult = GitSettings.updateConnectionSettingsIfValid(
                 newAuthMode = newAuthMode,
                 newUrl = binding.serverUrl.text.toString().trim(),
                 newBranch = binding.serverBranch.text.toString().trim())) {
                 GitSettings.UpdateConnectionSettingsResult.FailedToParseUrl -> {
                     Snackbar.make(binding.root, getString(R.string.git_server_config_save_error), Snackbar.LENGTH_LONG).show()
                 }
-                GitSettings.UpdateConnectionSettingsResult.MissingUsername -> {
-                    when (newProtocol) {
+                is GitSettings.UpdateConnectionSettingsResult.MissingUsername -> {
+                    when (updateResult.newProtocol) {
                         Protocol.Https -> Snackbar.make(binding.root, getString(R.string.git_server_config_save_missing_username_https), Snackbar.LENGTH_LONG).show()
                         Protocol.Ssh -> Snackbar.make(binding.root, getString(R.string.git_server_config_save_missing_username_ssh), Snackbar.LENGTH_LONG).show()
                     }
                 }
-                else -> {
+                GitSettings.UpdateConnectionSettingsResult.Valid -> {
                     if (isClone && PasswordRepository.getRepository(null) == null)
                         PasswordRepository.initialize()
                     if (!isClone) {
@@ -108,32 +89,18 @@ class GitServerConfigActivity : BaseGitActivity() {
                         cloneRepository()
                     }
                 }
+                is GitSettings.UpdateConnectionSettingsResult.AuthModeMismatch -> {
+                    val message = getString(
+                        R.string.git_server_config_save_auth_mode_mismatch,
+                        updateResult.newProtocol,
+                        updateResult.validModes.joinToString(", "),
+                    )
+                    Snackbar.make(binding.root, message, Snackbar.LENGTH_LONG).show()
+                }
             }
         }
     }
 
-    private fun updateAuthModeToggleGroup() {
-        if (newProtocol == Protocol.Ssh) {
-            binding.authModeSshKey.isEnabled = true
-            binding.authModeOpenKeychain.isEnabled = true
-            // Reset connection mode to SSH key if the current value (none) is not valid for SSH.
-            // Important note: This has to happen after enabling the other toggle buttons or they
-            // won't check.
-            if (binding.authModeGroup.checkedButtonIds.isEmpty())
-                binding.authModeGroup.check(R.id.auth_mode_ssh_key)
-            binding.authModeGroup.isSelectionRequired = true
-        } else {
-            binding.authModeGroup.isSelectionRequired = false
-            // Reset connection mode to password if the current value is not valid for HTTPS
-            // Important note: This has to happen before disabling the other toggle buttons or they
-            // won't uncheck.
-            if (newAuthMode !in listOf(AuthMode.None, AuthMode.Password))
-                binding.authModeGroup.check(R.id.auth_mode_password)
-            binding.authModeSshKey.isEnabled = false
-            binding.authModeOpenKeychain.isEnabled = false
-        }
-    }
-
     /**
      * Clones the repository, the directory exists, deletes it
      */
diff --git a/app/src/main/java/com/zeapo/pwdstore/git/config/GitSettings.kt b/app/src/main/java/com/zeapo/pwdstore/git/config/GitSettings.kt
index b9c572fc..b0d931e0 100644
--- a/app/src/main/java/com/zeapo/pwdstore/git/config/GitSettings.kt
+++ b/app/src/main/java/com/zeapo/pwdstore/git/config/GitSettings.kt
@@ -53,13 +53,6 @@ object GitSettings {
     private val settings by lazy { Application.instance.sharedPrefs }
     private val encryptedSettings by lazy { Application.instance.getEncryptedPrefs("git_operation") }
 
-    var protocol
-        get() = Protocol.fromString(settings.getString(PreferenceKeys.GIT_REMOTE_PROTOCOL))
-        private set(value) {
-            settings.edit {
-                putString(PreferenceKeys.GIT_REMOTE_PROTOCOL, value.pref)
-            }
-        }
     var authMode
         get() = AuthMode.fromString(settings.getString(PreferenceKeys.GIT_REMOTE_AUTH))
         private set(value) {
@@ -104,23 +97,39 @@ object GitSettings {
             }
         }
 
-    enum class UpdateConnectionSettingsResult {
-        Valid,
-        FailedToParseUrl,
-        MissingUsername,
+    sealed class UpdateConnectionSettingsResult {
+        class MissingUsername(val newProtocol: Protocol) : UpdateConnectionSettingsResult()
+        class AuthModeMismatch(val newProtocol: Protocol, val validModes: List<AuthMode>) : UpdateConnectionSettingsResult()
+        object Valid : UpdateConnectionSettingsResult()
+        object FailedToParseUrl : UpdateConnectionSettingsResult()
     }
 
-    fun updateConnectionSettingsIfValid(newProtocol: Protocol, newAuthMode: AuthMode, newUrl: String, newBranch: String): UpdateConnectionSettingsResult {
+    fun updateConnectionSettingsIfValid(newAuthMode: AuthMode, newUrl: String, newBranch: String): UpdateConnectionSettingsResult {
         val parsedUrl = try {
             URIish(newUrl)
         } catch (_: Exception) {
             return UpdateConnectionSettingsResult.FailedToParseUrl
         }
+        val newProtocol = when (parsedUrl.scheme) {
+            in listOf("http", "https") -> Protocol.Https
+            in listOf("ssh", null) -> Protocol.Ssh
+            else -> return UpdateConnectionSettingsResult.FailedToParseUrl
+        }
         if (newAuthMode != AuthMode.None && parsedUrl.user.isNullOrBlank())
-            return UpdateConnectionSettingsResult.MissingUsername
+            return UpdateConnectionSettingsResult.MissingUsername(newProtocol)
+
+        val validHttpsAuth = listOf(AuthMode.None, AuthMode.Password)
+        val validSshAuth = listOf(AuthMode.OpenKeychain, AuthMode.Password, AuthMode.SshKey)
+        when {
+            newProtocol == Protocol.Https && newAuthMode !in validHttpsAuth -> {
+                return UpdateConnectionSettingsResult.AuthModeMismatch(newProtocol, validHttpsAuth)
+            }
+            newProtocol == Protocol.Ssh && newAuthMode !in validSshAuth -> {
+                return UpdateConnectionSettingsResult.AuthModeMismatch(newProtocol, validSshAuth)
+            }
+        }
 
         url = newUrl
-        protocol = newProtocol
         authMode = newAuthMode
         branch = newBranch
         return UpdateConnectionSettingsResult.Valid
diff --git a/app/src/main/java/com/zeapo/pwdstore/utils/PreferenceKeys.kt b/app/src/main/java/com/zeapo/pwdstore/utils/PreferenceKeys.kt
index 05fb9326..2bb48201 100644
--- a/app/src/main/java/com/zeapo/pwdstore/utils/PreferenceKeys.kt
+++ b/app/src/main/java/com/zeapo/pwdstore/utils/PreferenceKeys.kt
@@ -32,6 +32,7 @@ object PreferenceKeys {
     const val GIT_REMOTE_LOCATION = "git_remote_location"
     @Deprecated("Use GIT_REMOTE_URL instead")
     const val GIT_REMOTE_PORT = "git_remote_port"
+    @Deprecated("Use GIT_REMOTE_URL instead")
     const val GIT_REMOTE_PROTOCOL = "git_remote_protocol"
     const val GIT_DELETE_REPO = "git_delete_repo"
     @Deprecated("Use GIT_REMOTE_URL instead")
diff --git a/app/src/main/res/layout/activity_git_clone.xml b/app/src/main/res/layout/activity_git_clone.xml
index f16bda94..b7ec6fc1 100644
--- a/app/src/main/res/layout/activity_git_clone.xml
+++ b/app/src/main/res/layout/activity_git_clone.xml
@@ -29,42 +29,6 @@
             app:layout_constraintStart_toStartOf="parent"
             app:layout_constraintTop_toTopOf="parent" />
 
-        <androidx.appcompat.widget.AppCompatTextView
-            android:id="@+id/label_server_protocol"
-            style="@style/TextAppearance.MaterialComponents.Headline6"
-            android:layout_width="0dp"
-            android:layout_height="wrap_content"
-            android:layout_margin="8dp"
-            android:text="@string/server_protocol"
-            app:layout_constraintStart_toStartOf="parent"
-            app:layout_constraintTop_toBottomOf="@id/server_label" />
-
-        <com.google.android.material.button.MaterialButtonToggleGroup
-            android:id="@+id/protocol_group"
-            style="@style/TextAppearance.MaterialComponents.Headline1"
-            android:layout_width="0dp"
-            android:layout_height="wrap_content"
-            android:layout_margin="8dp"
-            app:layout_constraintStart_toStartOf="parent"
-            app:layout_constraintTop_toBottomOf="@id/label_server_protocol"
-            app:selectionRequired="true"
-            app:singleSelection="true">
-
-            <com.google.android.material.button.MaterialButton
-                android:id="@+id/protocol_ssh"
-                style="?attr/materialButtonOutlinedStyle"
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:text="@string/clone_protocol_ssh" />
-
-            <com.google.android.material.button.MaterialButton
-                android:id="@+id/protocol_https"
-                style="?attr/materialButtonOutlinedStyle"
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:text="@string/clone_protocol_https" />
-        </com.google.android.material.button.MaterialButtonToggleGroup>
-
         <com.google.android.material.textfield.TextInputLayout
             android:id="@+id/label_server_url"
             android:layout_width="0dp"
@@ -73,15 +37,15 @@
             android:hint="@string/server_url"
             app:layout_constraintEnd_toEndOf="parent"
             app:layout_constraintStart_toStartOf="parent"
-            app:layout_constraintTop_toBottomOf="@id/protocol_group">
+            app:layout_constraintTop_toBottomOf="@id/server_label">
 
             <com.google.android.material.textfield.TextInputEditText
                 android:id="@+id/server_url"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
                 android:imeOptions="actionNext"
-                android:nextFocusForward="@id/server_branch"
-                android:inputType="textWebEmailAddress" />
+                android:inputType="textWebEmailAddress"
+                android:nextFocusForward="@id/server_branch" />
 
         </com.google.android.material.textfield.TextInputLayout>
 
@@ -91,21 +55,21 @@
             android:layout_height="wrap_content"
             android:layout_margin="8dp"
             android:hint="@string/server_branch"
-            app:layout_constraintStart_toStartOf="parent"
             app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toStartOf="parent"
             app:layout_constraintTop_toBottomOf="@id/label_server_url">
 
             <com.google.android.material.textfield.TextInputEditText
                 android:id="@+id/server_branch"
-                android:imeOptions="actionDone"
                 android:layout_width="match_parent"
-                android:inputType="textNoSuggestions"
-                android:layout_height="wrap_content" />
+                android:layout_height="wrap_content"
+                android:imeOptions="actionDone"
+                android:inputType="textNoSuggestions" />
 
         </com.google.android.material.textfield.TextInputLayout>
 
         <androidx.appcompat.widget.AppCompatTextView
-            android:id="@+id/label_connection_mode"
+            android:id="@+id/label_auth_mode"
             style="@style/TextAppearance.MaterialComponents.Headline6"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
@@ -123,7 +87,7 @@
             android:layout_height="wrap_content"
             android:layout_margin="8dp"
             app:layout_constraintStart_toStartOf="parent"
-            app:layout_constraintTop_toBottomOf="@id/label_connection_mode"
+            app:layout_constraintTop_toBottomOf="@id/label_auth_mode"
             app:singleSelection="true">
 
             <com.google.android.material.button.MaterialButton
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 86e1c722..f27224ff 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -330,6 +330,7 @@
     <string name="git_server_config_save_error">The provided repository URL is not valid</string>
     <string name="git_server_config_save_missing_username_https">Please specify the HTTPS username in the form https://username@example.com/…</string>
     <string name="git_server_config_save_missing_username_ssh">Please specify the SSH username in the form username@example.com:…</string>
+    <string name="git_server_config_save_auth_mode_mismatch">Valid authentication modes for %1$s: %2$s</string>
     <string name="git_config_error_hostname_empty">empty hostname</string>
     <string name="git_config_error_generic">please verify your settings and try again</string>
     <string name="git_config_error_nonnumeric_port">port must be numeric</string>