Editing WoW:API IsUsableSpell

{{wowapi}}

Determines whether a spell can be used by the player character.

 usable, nomana = IsUsableSpell("spellName" or spellID or spellIndex[, "bookType"]);

==Arguments==
;spellName : String: name of the spell to check.
;spellIndex : Number: index of a spell in the player's (or pet's) spellbook.
;spellID : Number: SpellID of a spell to check.
;bookType: String: does the spellIndex refer to the player's spellbook (BOOKTYPE_SPELL constant, default), or the pet's spellbook (BOOKTYPE_PET constant).

==Returns==
;usable :Boolean : 1 (true) if the spell is usable, nil otherwise. A spell is not usable if any of the following conditions apply:
:* The player hasn't learned the spell
:* The player lacks required mana or reagents.
:* Reactive conditions haven't been met.
;nomana : Boolean : 1 (true) if the spell can not be cast due to low mana, nil otherwise.

==Example==
  usable, nomana = IsUsableSpell("Curse of Elements");
  if (not usable) then
   if (not nomana) then
     message("The spell cannot be cast");
   else
     message("You do not have enough mana to cast the spell");
   end
  else
     message("The spell may be cast");
  end

  usable, nomana = IsUsableSpell(20, BOOKTYPE_SPELL); 
  print(GetSpellName(20, BOOKTYPE_SPELL) .. " is " .. (usable and "" or "not ") .. " usable.");