add screenshare module, add @NotNullable to old modules before build …

…tools update

src/main/java/com/github/coleb1911/ghost2/commands/modules/moderation/ModuleBan.java

@@ -7,6 +7,8 @@
 import discord4j.core.object.util.PermissionSet;
 import reactor.core.publisher.Mono;
 
+import javax.validation.constraints.NotNull;
+
 public final class ModuleBan extends Module {
     public ModuleBan() {
         super(new ModuleInfo.Builder(ModuleBan.class)
@@ -16,7 +18,7 @@ public ModuleBan() {
     }
 
     @Override
-    public void invoke(CommandContext ctx) {
+    public void invoke(@NotNull CommandContext ctx) {
         //Check for args
         try{
             ctx.getArgs().get(0);

src/main/java/com/github/coleb1911/ghost2/commands/modules/moderation/ModuleMute.java

@@ -7,6 +7,8 @@
 import discord4j.core.object.util.PermissionSet;
 import reactor.core.publisher.Mono;
 
+import javax.validation.constraints.NotNull;
+
 public final class ModuleMute extends Module {
     public ModuleMute() {
         super(new ModuleInfo.Builder(ModuleMute.class)
@@ -16,7 +18,7 @@ public ModuleMute() {
     }
 
     @Override
-    public void invoke(CommandContext ctx) {
+    public void invoke(@NotNull CommandContext ctx) {
         //Check for args
         try{
             ctx.getArgs().get(0);

src/main/java/com/github/coleb1911/ghost2/commands/modules/utility/ModuleScreenshare.java

@@ -0,0 +1,32 @@
+package com.github.coleb1911.ghost2.commands.modules.utility;
+
+import com.github.coleb1911.ghost2.commands.meta.CommandContext;
+import com.github.coleb1911.ghost2.commands.meta.Module;
+import com.github.coleb1911.ghost2.commands.meta.ModuleInfo;
+import discord4j.core.object.VoiceState;
+import discord4j.core.object.util.Snowflake;
+
+import javax.validation.constraints.NotNull;
+import java.util.Optional;
+
+public final class ModuleScreenshare extends Module {
+
+    private static final String NOVOICE = "You are not in a voice channel. Please join a voice channel to use the `screenshare` command.";
+
+    public ModuleScreenshare() {
+        super(new ModuleInfo.Builder(ModuleScreenshare.class)
+                .withName("screenshare")
+                .withDescription("Generates a screenshare link."));
+    }
+
+    @Override
+    public void invoke(@NotNull CommandContext ctx) {
+        // Check if user is connected to a voice channel
+        Optional<Snowflake> state = ctx.getInvoker().getVoiceState().map(VoiceState::getChannelId).block();
+        if(state.isPresent())
+            ctx.reply("https://discordapp.com/channels/" + ctx.getGuild().getId().asLong() + "/" + ctx.getInvoker().getVoiceState().block().getChannelId().get().asLong());
+        else {
+            ctx.reply(NOVOICE);
+        }
+    }
+}