feat: Add help command

src/main/kotlin/com/github/fmueller/jarvis/commands/ChatCommand.kt

@@ -0,0 +1,15 @@
+package com.github.fmueller.jarvis.commands
+
+import com.github.fmueller.jarvis.ai.OllamaService
+import com.github.fmueller.jarvis.conversation.Conversation
+import com.github.fmueller.jarvis.conversation.Message
+import com.github.fmueller.jarvis.conversation.Role
+
+class ChatCommand(private val ollamaService: OllamaService) : SlashCommand {
+
+    override suspend fun run(conversation: Conversation): Conversation {
+        val response = ollamaService.chat(conversation.messages).trim()
+        conversation.addMessage(Message(Role.ASSISTANT, response))
+        return conversation
+    }
+}

src/main/kotlin/com/github/fmueller/jarvis/commands/HelpCommand.kt

@@ -0,0 +1,19 @@
+package com.github.fmueller.jarvis.commands
+
+import com.github.fmueller.jarvis.conversation.Conversation
+import com.github.fmueller.jarvis.conversation.Message
+import com.github.fmueller.jarvis.conversation.Role
+
+class HelpCommand : SlashCommand {
+
+    override suspend fun run(conversation: Conversation): Conversation {
+        conversation.addMessage(
+            Message(
+                Role.ASSISTANT,
+                "I'm Jarvis, your personal coding assistant. You can ask me anything. To make me work properly," +
+                        " please install and run Ollama locally."
+            )
+        )
+        return conversation
+    }
+}

src/main/kotlin/com/github/fmueller/jarvis/commands/SlashCommand.kt

@@ -0,0 +1,8 @@
+package com.github.fmueller.jarvis.commands
+
+import com.github.fmueller.jarvis.conversation.Conversation
+
+interface SlashCommand {
+
+    suspend fun run(conversation: Conversation): Conversation
+}

src/main/kotlin/com/github/fmueller/jarvis/commands/SlashCommandParser.kt

@@ -0,0 +1,15 @@
+package com.github.fmueller.jarvis.commands
+
+import com.github.fmueller.jarvis.ai.OllamaService
+
+class SlashCommandParser(private val ollamaService: OllamaService) {
+
+    fun parse(message: String): SlashCommand {
+        val trimmedMessage = message.trim().lowercase()
+        if (trimmedMessage == "/help" || trimmedMessage == "/?") {
+            return HelpCommand()
+        }
+
+        return ChatCommand(ollamaService)
+    }
+}

src/main/kotlin/com/github/fmueller/jarvis/conversation/Conversation.kt

@@ -1,6 +1,7 @@
 package com.github.fmueller.jarvis.conversation
 
 import com.github.fmueller.jarvis.ai.OllamaService
+import com.github.fmueller.jarvis.commands.SlashCommandParser
 import java.beans.PropertyChangeListener
 import java.beans.PropertyChangeSupport
 import java.time.LocalDateTime
@@ -15,24 +16,25 @@ enum class Role {
 
 data class Message(val role: Role, val content: String, val createdAt: LocalDateTime = LocalDateTime.now())
 
-class Conversation(private val ollamaService: OllamaService) {
+class Conversation(ollamaService: OllamaService) {
 
-    private val messages = mutableListOf<Message>()
+    private var _messages = mutableListOf<Message>()
+    val messages get() = _messages.toList()
+
+    private val commandParser = SlashCommandParser(ollamaService)
     private val propertyChangeSupport = PropertyChangeSupport(this)
 
     suspend fun chat(message: String): Conversation {
         addMessage(Message(Role.USER, message.trim()))
 
-        // TODO implement simple pipeline for slash command detection
-        val response = ollamaService.chat(messages).trim()
-        addMessage(Message(Role.ASSISTANT, response))
-        return this
+        val command = commandParser.parse(message)
+        return command.run(this)
     }
 
     fun addMessage(message: Message) {
-        val oldMessages = ArrayList(messages)
-        messages.add(message)
-        propertyChangeSupport.firePropertyChange("messages", oldMessages, ArrayList(messages))
+        val oldMessages = ArrayList(_messages)
+        _messages.add(message)
+        propertyChangeSupport.firePropertyChange("messages", oldMessages, ArrayList(_messages))
     }
 
     fun addPropertyChangeListener(listener: PropertyChangeListener) {