Small iteration on command parser

changelog.d/4998.misc

@@ -0,0 +1 @@
+ Small iteration on command parser and unit test it.

vector/src/main/java/im/vector/app/features/command/CommandParser.kt

@@ -23,8 +23,9 @@ import org.matrix.android.sdk.api.MatrixPatterns
 import org.matrix.android.sdk.api.MatrixUrls.isMxcUrl
 import org.matrix.android.sdk.api.session.identity.ThreePid
 import timber.log.Timber
+import javax.inject.Inject
 
-object CommandParser {
+class CommandParser @Inject constructor() {
 
     /**
      * Convert the text message into a Slash command.
@@ -34,11 +35,9 @@ object CommandParser {
      */
     fun parseSlashCommand(textMessage: CharSequence): ParsedCommand {
         // check if it has the Slash marker
-        if (!textMessage.startsWith("/")) {
-            return ParsedCommand.ErrorNotACommand
+        return if (!textMessage.startsWith("/")) {
+            ParsedCommand.ErrorNotACommand
         } else {
-            Timber.v("parseSlashCommand")
-
             // "/" only
             if (textMessage.length == 1) {
                 return ParsedCommand.ErrorEmptySlashCommand
@@ -52,7 +51,7 @@ object CommandParser {
             val messageParts = try {
                 textMessage.split("\\s+".toRegex()).dropLastWhile { it.isEmpty() }
             } catch (e: Exception) {
-                Timber.e(e, "## manageSlashCommand() : split failed")
+                Timber.e(e, "## parseSlashCommand() : split failed")
                 null
             }
 
@@ -64,7 +63,7 @@ object CommandParser {
             val slashCommand = messageParts.first()
             val message = textMessage.substring(slashCommand.length).trim()
 
-            return when {
+            when {
                 Command.PLAIN.matches(slashCommand)                        -> {
                     if (message.isNotEmpty()) {
                         ParsedCommand.SendPlainText(message = message)

vector/src/main/java/im/vector/app/features/command/ParsedCommand.kt

@@ -22,51 +22,51 @@ import org.matrix.android.sdk.api.session.identity.ThreePid
 /**
  * Represent a parsed command
  */
-sealed class ParsedCommand {
+sealed interface ParsedCommand {
     // This is not a Slash command
-    object ErrorNotACommand : ParsedCommand()
+    object ErrorNotACommand : ParsedCommand
 
-    object ErrorEmptySlashCommand : ParsedCommand()
+    object ErrorEmptySlashCommand : ParsedCommand
 
     // Unknown/Unsupported slash command
-    class ErrorUnknownSlashCommand(val slashCommand: String) : ParsedCommand()
+    data class ErrorUnknownSlashCommand(val slashCommand: String) : ParsedCommand
 
     // A slash command is detected, but there is an error
-    class ErrorSyntax(val command: Command) : ParsedCommand()
+    data class ErrorSyntax(val command: Command) : ParsedCommand
 
     // Valid commands:
 
-    class SendPlainText(val message: CharSequence) : ParsedCommand()
-    class SendEmote(val message: CharSequence) : ParsedCommand()
-    class SendRainbow(val message: CharSequence) : ParsedCommand()
-    class SendRainbowEmote(val message: CharSequence) : ParsedCommand()
-    class BanUser(val userId: String, val reason: String?) : ParsedCommand()
-    class UnbanUser(val userId: String, val reason: String?) : ParsedCommand()
-    class IgnoreUser(val userId: String) : ParsedCommand()
-    class UnignoreUser(val userId: String) : ParsedCommand()
-    class SetUserPowerLevel(val userId: String, val powerLevel: Int?) : ParsedCommand()
-    class ChangeRoomName(val name: String) : ParsedCommand()
-    class Invite(val userId: String, val reason: String?) : ParsedCommand()
-    class Invite3Pid(val threePid: ThreePid) : ParsedCommand()
-    class JoinRoom(val roomAlias: String, val reason: String?) : ParsedCommand()
-    class PartRoom(val roomAlias: String?) : ParsedCommand()
-    class ChangeTopic(val topic: String) : ParsedCommand()
-    class RemoveUser(val userId: String, val reason: String?) : ParsedCommand()
-    class ChangeDisplayName(val displayName: String) : ParsedCommand()
-    class ChangeDisplayNameForRoom(val displayName: String) : ParsedCommand()
-    class ChangeRoomAvatar(val url: String) : ParsedCommand()
-    class ChangeAvatarForRoom(val url: String) : ParsedCommand()
-    class SetMarkdown(val enable: Boolean) : ParsedCommand()
-    object ClearScalarToken : ParsedCommand()
-    class SendSpoiler(val message: String) : ParsedCommand()
-    class SendShrug(val message: CharSequence) : ParsedCommand()
-    class SendLenny(val message: CharSequence) : ParsedCommand()
-    object DiscardSession : ParsedCommand()
-    class ShowUser(val userId: String) : ParsedCommand()
-    class SendChatEffect(val chatEffect: ChatEffect, val message: String) : ParsedCommand()
-    class CreateSpace(val name: String, val invitees: List<String>) : ParsedCommand()
-    class AddToSpace(val spaceId: String) : ParsedCommand()
-    class JoinSpace(val spaceIdOrAlias: String) : ParsedCommand()
-    class LeaveRoom(val roomId: String) : ParsedCommand()
-    class UpgradeRoom(val newVersion: String) : ParsedCommand()
+    data class SendPlainText(val message: CharSequence) : ParsedCommand
+    data class SendEmote(val message: CharSequence) : ParsedCommand
+    data class SendRainbow(val message: CharSequence) : ParsedCommand
+    data class SendRainbowEmote(val message: CharSequence) : ParsedCommand
+    data class BanUser(val userId: String, val reason: String?) : ParsedCommand
+    data class UnbanUser(val userId: String, val reason: String?) : ParsedCommand
+    data class IgnoreUser(val userId: String) : ParsedCommand
+    data class UnignoreUser(val userId: String) : ParsedCommand
+    data class SetUserPowerLevel(val userId: String, val powerLevel: Int?) : ParsedCommand
+    data class ChangeRoomName(val name: String) : ParsedCommand
+    data class Invite(val userId: String, val reason: String?) : ParsedCommand
+    data class Invite3Pid(val threePid: ThreePid) : ParsedCommand
+    data class JoinRoom(val roomAlias: String, val reason: String?) : ParsedCommand
+    data class PartRoom(val roomAlias: String?) : ParsedCommand
+    data class ChangeTopic(val topic: String) : ParsedCommand
+    data class RemoveUser(val userId: String, val reason: String?) : ParsedCommand
+    data class ChangeDisplayName(val displayName: String) : ParsedCommand
+    data class ChangeDisplayNameForRoom(val displayName: String) : ParsedCommand
+    data class ChangeRoomAvatar(val url: String) : ParsedCommand
+    data class ChangeAvatarForRoom(val url: String) : ParsedCommand
+    data class SetMarkdown(val enable: Boolean) : ParsedCommand
+    object ClearScalarToken : ParsedCommand
+    data class SendSpoiler(val message: String) : ParsedCommand
+    data class SendShrug(val message: CharSequence) : ParsedCommand
+    data class SendLenny(val message: CharSequence) : ParsedCommand
+    object DiscardSession : ParsedCommand
+    data class ShowUser(val userId: String) : ParsedCommand
+    data class SendChatEffect(val chatEffect: ChatEffect, val message: String) : ParsedCommand
+    data class CreateSpace(val name: String, val invitees: List<String>) : ParsedCommand
+    data class AddToSpace(val spaceId: String) : ParsedCommand
+    data class JoinSpace(val spaceIdOrAlias: String) : ParsedCommand
+    data class LeaveRoom(val roomId: String) : ParsedCommand
+    data class UpgradeRoom(val newVersion: String) : ParsedCommand
 }

vector/src/main/java/im/vector/app/features/home/room/detail/composer/MessageComposerViewModel.kt

@@ -66,6 +66,7 @@ class MessageComposerViewModel @AssistedInject constructor(
         private val session: Session,
         private val stringProvider: StringProvider,
         private val vectorPreferences: VectorPreferences,
+        private val commandParser: CommandParser,
         private val rainbowGenerator: RainbowGenerator,
         private val voiceMessageHelper: VoiceMessageHelper,
         private val voicePlayerHelper: VoicePlayerHelper
@@ -183,7 +184,7 @@ class MessageComposerViewModel @AssistedInject constructor(
         withState { state ->
             when (state.sendMode) {
                 is SendMode.Regular -> {
-                    when (val slashCommandResult = CommandParser.parseSlashCommand(action.text)) {
+                    when (val slashCommandResult = commandParser.parseSlashCommand(action.text)) {
                         is ParsedCommand.ErrorNotACommand         -> {
                             // Send the text message to the room
                             room.sendTextMessage(action.text, autoMarkdown = action.autoMarkdown)

vector/src/test/java/im/vector/app/features/command/CommandParserTest.kt

@@ -0,0 +1,66 @@
+/*
+ * Copyright (c) 2022 New Vector Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package im.vector.app.features.command
+
+import org.amshove.kluent.shouldBeEqualTo
+import org.junit.Test
+
+class CommandParserTest {
+    @Test
+    fun parseSlashCommandEmpty() {
+        test("/", ParsedCommand.ErrorEmptySlashCommand)
+    }
+
+    @Test
+    fun parseSlashCommandUnknown() {
+        test("/unknown", ParsedCommand.ErrorUnknownSlashCommand("/unknown"))
+        test("/unknown with param", ParsedCommand.ErrorUnknownSlashCommand("/unknown"))
+    }
+
+    @Test
+    fun parseSlashCommandNotACommand() {
+        test("", ParsedCommand.ErrorNotACommand)
+        test("test", ParsedCommand.ErrorNotACommand)
+        test("// test", ParsedCommand.ErrorNotACommand)
+    }
+
+    @Test
+    fun parseSlashCommandEmote() {
+        test("/me test", ParsedCommand.SendEmote("test"))
+        test("/me", ParsedCommand.ErrorSyntax(Command.EMOTE))
+    }
+
+    @Test
+    fun parseSlashCommandRemove() {
+        // Nominal
+        test("/remove @foo:bar", ParsedCommand.RemoveUser("@foo:bar", null))
+        // With a reason
+        test("/remove @foo:bar a reason", ParsedCommand.RemoveUser("@foo:bar", "a reason"))
+        // Trim the reason
+        test("/remove @foo:bar    a    reason    ", ParsedCommand.RemoveUser("@foo:bar", "a    reason"))
+        // Alias
+        test("/kick @foo:bar", ParsedCommand.RemoveUser("@foo:bar", null))
+        // Error
+        test("/remove", ParsedCommand.ErrorSyntax(Command.REMOVE_USER))
+    }
+
+    private fun test(message: String, expectedResult: ParsedCommand) {
+        val commandParser = CommandParser()
+        val result = commandParser.parseSlashCommand(message)
+        result shouldBeEqualTo expectedResult
+    }
+}