How to make a clickable link that executes a command with bukkit - minecraft

Question

I'm trying to make a bukkit plugin and I can't seem to find any documentation on this but I've seen it done, How would I input commands into a chat message that a user could click on to execute a command on the server like "/motd" in the form of a clickable link like a URL
if (commandLabel.equalsIgnoreCase("cmd") {
player.sendMessage("Pick a command: " + </motd> + ", " + </mail> );
}
replacing "" and "" to output something like this:
Pick a command: MOTD, Mail
and clicking them would execute the command to the server as them. How would I do this?

Answer 1

You could do it like this:
IChatBaseComponent comp = ChatSerializer
.a("{\"text\":\"" + "Choose one: " + "\",\"extra\":[{\"text\":\"" + "MOTD" + "\",\"clickEvent\":{\"action\":\"run_command\",\"value\":\"" + "/motd" + "\"}}]}");
PacketPlayOutChat packet = new PacketPlayOutChat(comp, true);
((CraftPlayer) <player>).getHandle().playerConnection.sendPacket(packet);
This would send them a message showing:
Choose one: MOTD
and when the user clicked MOTD, it would run the command /motd as the player. Here's a little breakdown of what we're actually doing:
IChatBaseComponent comp = ChatSerializer
.a("{\"text\":\"" + "<Ignored Message> " +
"\",\"extra\":[{\"text\":\"" + "<Message that will be clicked>" +
"\",\"clickEvent\":{\"action\":\"run_command\",\"value\":\"" +
"<Command to be run when message is clicked>" + "\"}}]}");
PacketPlayOutChat packet = new PacketPlayOutChat(comp, true);
((CraftPlayer) <player>).getHandle().playerConnection.sendPacket(packet);
The above code will send the player:
<Ignored Message> <Message that will be clicked>
and when the player clicks <Message that will be clicked>
they will run the command <Command to be run when a message is clicked>, and because it does not start with the command prefix, /, it will force them to chat <Command to be run when a message is clicked>.
Unfortunately, as far as I know, you can only put one click event per message, so you would have to do something like this:
Choose one:
MOTD
Mail
So you would have to do, where the variable player is the player:
player.sendMessage("Choose one:");
IChatBaseComponent comp = ChatSerializer
.a("{\"text\":\"" +
"\",\"extra\":[{\"text\":\"" + "MOTD" +
"\",\"clickEvent\":{\"action\":\"run_command\",\"value\":\"" +
"/motd" + "\"}}]}");
PacketPlayOutChat packet = new PacketPlayOutChat(comp, true);
((CraftPlayer) player).getHandle().playerConnection.sendPacket(packet);
IChatBaseComponent comp2 = ChatSerializer
.a("{\"text\":\"" +
"\",\"extra\":[{\"text\":\"" + "Mail" +
"\",\"clickEvent\":{\"action\":\"run_command\",\"value\":\"" +
"/mail" + "\"}}]}");
PacketPlayOutChat packet2 = new PacketPlayOutChat(comp2, true);
((CraftPlayer) player).getHandle().playerConnection.sendPacket(packet2);
When MOTD is clicked, /motd will be run by the player, and when Mail is clicked, /mail will be run.
Just as a side note, you will need to include craftbukkit in your build path, along with bukkit to do this

Answer 2

Or you could simply just do this (I did my own, You can edit it)
/execute #a ~ ~ ~ tellraw #p ["",{"text":"Click this to die","color":"dark_red","bold":true,"clickEvent":{"action":"run_command","value":"/kill #p"},"hoverEvent":{"action":"show_text","value":{"text":"","extra":[{"text":"Kills you!"}]}}}]
run_command can be replaced with Open URL too.
You can replace dark red with any colour too. You can replace true with false for bold if you want, /kill #p can be replaced with a command (Or a https:// link if you do Open URL, show_text can be replaced with Show Item, Show entity, or Show Achivement. Text & Kills you can be replaced with the different thing (eg, Show entity) (Entity replaces text)
I found a website if your stuck! Good day :) http://minecraftjson.com/