Testing what a player says

Question

I would like to make a minecraft map where command blocks say would you like to go to lava parkour? Then if you say yes it will tp you if you so no nothing happens. I was thinking it's probably a /testfor @p/say"yes" or something I'm in the latest snapshot it is probably no something possible but I would like to try

Answer 1

Here's something little input together with the /tellraw command. All you have to do is click on Teleport? when the message shows up in chat. Here's the command:

/tellraw @a {"text":"","extra":[{"text":"Would you like to teleport?","clickEvent":{"action":"run_command","value":"/tp @a <x> <y> <z>"},"hoverEvent":{"action":"show_text","value":"Teleport?"}}]}

Remember to replace <x> <y> <z> with the specific coordinate values. You can also add colors to the text, but I'll let you figure that one out. Note: In order for this message to appear in chat, the command block containing it must be activated in some way. Anyways, hope this helps!


Note I haven't had time to fully test this yet, so tell me if something is wrong. Thanks!


Another note: If players are required to be an OP, switch their gamemodes to creative, then after they teleport back to survival.

Answer 2

Building on DatEpicCoderGuyWhoPrograms' Answer (and stealing his json for tellraw), you can use trigger to circumvent needing OP permissions to teleport on click. They have to be enabled for a player (done via commandblock), who can then use the /trigger command to modify his score once, then the trigger is disabled again.

Tutorial

Set up a trigger objective (once) using

/scoreboard objective add <name> trigger

Use two command blocks with

/scoreboard players enable <player> <name>
/tellraw @a {"text":"","extra":[{"text":"Would you like to teleport?","clickEvent":{"action":"run_command","value":"/trigger <name> set 1"},"hoverEvent":{"action":"show_text","value":"Teleport?"}}]}

The teleport itself is done via a command-block hooked to a clock, using

/tp @a[score_<name>_min=1] <x> <y> <z>

Replace all values in <> with the appropriate values.