connection commands

src/main/java/de/bixilon/minosoft/commands/errors/ReaderError.kt

@@ -19,4 +19,4 @@ abstract class ReaderError(
     val reader: CommandReader,
     val start: Int,
     val end: Int,
-) : Exception("Error at $start-$end: ${reader.string} (at ${reader.string.substring(start, end)}")
+) : Exception("Error at $start-$end: ${reader.string} (at ${reader.string.substring(start, end)})")

src/main/java/de/bixilon/minosoft/commands/nodes/CommandNode.kt

@@ -83,4 +83,8 @@ abstract class CommandNode(
         }
         return suggestions
     }
+
+    fun clear() {
+        children.clear()
+    }
 }

src/main/java/de/bixilon/minosoft/commands/nodes/RootNode.kt

@@ -16,14 +16,19 @@ package de.bixilon.minosoft.commands.nodes
 import de.bixilon.minosoft.commands.nodes.builder.CommandNodeBuilder
 import de.bixilon.minosoft.commands.stack.CommandStack
 import de.bixilon.minosoft.commands.util.CommandReader
+import de.bixilon.minosoft.protocol.network.connection.play.PlayConnection
 
 class RootNode : CommandNode {
 
     constructor() : super(false, null)
     constructor(builder: CommandNodeBuilder) : super(builder.executable, null)
 
-    fun execute(command: String) {
+    fun execute(command: String, connection: PlayConnection? = null) {
-        execute(CommandReader(command), CommandStack())
+        val stack = CommandStack()
+        if (connection != null) {
+            stack.connection = connection
+        }
+        execute(CommandReader(command), stack)
     }
 
     fun getSuggestions(command: String): List<Any?> {

src/main/java/de/bixilon/minosoft/commands/parser/minecraft/target/targets/selector/properties/TargetProperties.kt

@@ -21,6 +21,7 @@ import de.bixilon.minosoft.commands.parser.minecraft.target.targets.selector.pro
 import de.bixilon.minosoft.commands.parser.minecraft.target.targets.selector.properties.rotation.YawRotation
 import de.bixilon.minosoft.commands.parser.minecraft.target.targets.selector.properties.sort.SortProperty
 
+// See https://minecraft.fandom.com/wiki/Target_selectors
 object TargetProperties {
     val properties: MutableMap<String, TargetPropertyFactory<*>> = mutableMapOf()
 

src/main/java/de/bixilon/minosoft/commands/stack/CommandStack.kt

@@ -15,12 +15,14 @@ package de.bixilon.minosoft.commands.stack
 
 import de.bixilon.kutil.cast.CastUtil.nullCast
 import de.bixilon.minosoft.data.entities.entities.Entity
+import de.bixilon.minosoft.protocol.network.connection.play.PlayConnection
 
 class CommandStack {
     private val stack: MutableList<StackEntry> = mutableListOf()
     val size: Int get() = stack.size
 
     var executor: Entity? = null
+    lateinit var connection: PlayConnection
 
     @Suppress("NON_PUBLIC_CALL_FROM_PUBLIC_INLINE")
     inline operator fun <reified T> get(name: String): T? {

src/main/java/de/bixilon/minosoft/commands/util/CommandReader.kt

@@ -209,7 +209,7 @@ open class CommandReader(val string: String) {
             return null
         }
         val string = string.substring(pointer, string.length)
-        pointer = string.length
+        pointer = this.string.length
         return string
     }
 

src/main/java/de/bixilon/minosoft/protocol/network/connection/play/PlayConnection.kt

@@ -52,6 +52,7 @@ import de.bixilon.minosoft.protocol.packets.c2s.handshaking.HandshakeC2SP
 import de.bixilon.minosoft.protocol.packets.c2s.login.StartC2SP
 import de.bixilon.minosoft.protocol.protocol.ProtocolStates
 import de.bixilon.minosoft.terminal.RunConfiguration
+import de.bixilon.minosoft.terminal.cli.CLI
 import de.bixilon.minosoft.util.ServerAddress
 import de.bixilon.minosoft.util.logging.Log
 import de.bixilon.minosoft.util.logging.LogLevels
@@ -119,6 +120,9 @@ class PlayConnection(
                 assetsManager.unload()
                 state = PlayConnectionStates.DISCONNECTED
                 ACTIVE_CONNECTIONS -= this
+                if (CLI.connection === this) {
+                    CLI.connection = null
+                }
             }
         }
         network::state.observe(this) {
@@ -131,6 +135,10 @@ class PlayConnection(
                 ProtocolStates.PLAY -> {
                     state = PlayConnectionStates.JOINING
 
+                    if (CLI.connection == null) {
+                        CLI.connection = this
+                    }
+
                     registerEvent(CallbackEventInvoker.of<ChatMessageReceiveEvent> {
                         val additionalPrefix = when (it.type.position) {
                             ChatTextPositions.SYSTEM -> "[SYSTEM] "

src/main/java/de/bixilon/minosoft/terminal/cli/CLI.kt

@@ -14,16 +14,38 @@
 package de.bixilon.minosoft.terminal.cli
 
 import de.bixilon.kutil.latch.CountUpAndDownLatch
+import de.bixilon.kutil.watcher.DataWatcher.Companion.observe
+import de.bixilon.kutil.watcher.DataWatcher.Companion.watched
 import de.bixilon.minosoft.ShutdownReasons
+import de.bixilon.minosoft.commands.nodes.RootNode
 import de.bixilon.minosoft.protocol.network.connection.play.PlayConnection
 import de.bixilon.minosoft.terminal.commands.Commands
+import de.bixilon.minosoft.terminal.commands.ConnectionCommand
 import de.bixilon.minosoft.util.ShutdownManager
 import org.jline.reader.*
 import org.jline.terminal.Terminal
 import org.jline.terminal.TerminalBuilder
 
 object CLI {
-    var connection: PlayConnection? = null
+    var connection: PlayConnection? by watched(null)
+    private val ROOT_NODE = RootNode()
+
+    init {
+        register()
+    }
+
+    @Synchronized
+    private fun register() {
+        ROOT_NODE.clear()
+        val connection = this.connection
+
+        for (command in Commands.COMMANDS) {
+            if (command is ConnectionCommand && connection == null) {
+                continue
+            }
+            ROOT_NODE.addChild(command.node)
+        }
+    }
 
 
     fun startThread(latch: CountUpAndDownLatch) {
@@ -41,6 +63,9 @@ object CLI {
             .completer(NodeCompleter)
             .build()
 
+        this::connection.observe(this) { register() }
+
+
         while (true) {
             try {
                 val line: String = reader.readLine().removeDuplicatedWhitespaces()
@@ -48,7 +73,7 @@ object CLI {
                     continue
                 }
                 terminal.flush()
-                Commands.ROOT_NODE.execute(line)
+                ROOT_NODE.execute(line, connection)
             } catch (exception: UserInterruptException) {
                 ShutdownManager.shutdown(reason = ShutdownReasons.ALL_FINE)
             } catch (exception: Throwable) {
@@ -64,7 +89,7 @@ object CLI {
     object NodeCompleter : Completer {
 
         override fun complete(reader: LineReader, line: ParsedLine, candidates: MutableList<Candidate>) {
-            val suggestions = Commands.ROOT_NODE.getSuggestions(line.line())
+            val suggestions = ROOT_NODE.getSuggestions(line.line())
             for (suggestion in suggestions) {
                 candidates += Candidate(suggestion.toString())
             }

src/main/java/de/bixilon/minosoft/terminal/commands/Command.kt

@@ -16,6 +16,5 @@ package de.bixilon.minosoft.terminal.commands
 import de.bixilon.minosoft.commands.nodes.LiteralNode
 
 interface Command {
-
+    var node: LiteralNode
-    fun build(): LiteralNode
 }

src/main/java/de/bixilon/minosoft/terminal/commands/Commands.kt

@@ -13,14 +13,9 @@
 
 package de.bixilon.minosoft.terminal.commands
 
-import de.bixilon.minosoft.commands.nodes.RootNode
-
 object Commands {
-    val ROOT_NODE = RootNode()
+    val COMMANDS: List<Command> = listOf(
-        .register(HelpCommand)
+        HelpCommand,
-
+        SayCommand,
-    fun RootNode.register(command: Command): RootNode {
+    )
-        this.addChild(command.build())
-        return this
-    }
 }

src/main/java/de/bixilon/minosoft/terminal/commands/ConnectionCommand.kt

@@ -0,0 +1,16 @@
+/*
+ * Minosoft
+ * Copyright (C) 2020-2022 Moritz Zwerger
+ *
+ * This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * This software is not affiliated with Mojang AB, the original developer of Minecraft.
+ */
+
+package de.bixilon.minosoft.terminal.commands
+
+interface ConnectionCommand : Command

src/main/java/de/bixilon/minosoft/terminal/commands/HelpCommand.kt

@@ -20,11 +20,8 @@ import de.bixilon.minosoft.commands.nodes.LiteralNode
 import de.bixilon.minosoft.commands.parser.minosoft.enums.EnumParser
 
 object HelpCommand : Command {
-
+    override var node: LiteralNode = LiteralNode("help", setOf("?"), executor = { printHelp() })
-    override fun build(): LiteralNode {
+        .addChild(ArgumentNode("subcommand", parser = EnumParser(HelpCommands), executor = { printHelp(it["subcommand"]!!) }))
-        return LiteralNode("help", setOf("?"), executor = { printHelp() })
-            .addChild(ArgumentNode("subcommand", parser = EnumParser(HelpCommands), executor = { printHelp(it["subcommand"]!!) }))
-    }
 
     fun printHelp() {
         println("-------------- Minosoft help --------------")

src/main/java/de/bixilon/minosoft/terminal/commands/SayCommand.kt

@@ -0,0 +1,25 @@
+/*
+ * Minosoft
+ * Copyright (C) 2020-2022 Moritz Zwerger
+ *
+ * This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * This software is not affiliated with Mojang AB, the original developer of Minecraft.
+ */
+
+package de.bixilon.minosoft.terminal.commands
+
+import de.bixilon.minosoft.commands.nodes.ArgumentNode
+import de.bixilon.minosoft.commands.nodes.LiteralNode
+import de.bixilon.minosoft.commands.parser.brigadier.string.StringParser
+
+object SayCommand : ConnectionCommand {
+    override var node = LiteralNode("say", setOf("chat", "send", "write"))
+        .addChild(ArgumentNode("message", StringParser(StringParser.StringModes.GREEDY), executor = {
+            it.connection.util.sendChatMessage(it.get<String>("message")!!)
+        }))
+}