Grapple Hook | Similar to a specific popular server

if player's held item's name is "&aGrappling Hook":
if "%fish state%" is "CAUGHT" or "REEL_IN" or "IN_GROUND":
set {cooldown.%player%} to true
set {nofalldamage.grapplinghook.%player%} to true
repair player's held item
set {_ploc.x} to x coordinate of player
set {_floc.x} to x coordinate of fishing hook
set {_ang} to {_floc.x} - {_ploc.x}
set {_ploc.z} to z coordinate of player
set {_floc.z} to z coordinate of fishing hook
set {_ang.2} to {_floc.z} - {_ploc.z}
set velocity of player to new Vector {_ang}, 1, {_ang.2}
wait 2 seconds
delete {cooldown.%player%}

on join:
delete {cooldown.%player%}
delete {nofalldamage.grapplinghook.%player%}

every 2 seconds:
loop all players:
if {nofalldamage.grapplinghook.%loop-player%} is true:
if block below loop-player is solid:
delete {nofalldamage.grapplinghook.%loop-player%}

on damage of player:
if damage cause is fall:
if {nofalldamage.grapplinghook.%victim%} is true:
cancel event
delete {nofalldamage.grapplinghook.%victim%}