roll: add (dis)advantage

src/modules/misc/roll.js

@@ -6,7 +6,7 @@ const roll = new Command("roll");
 roll.category = "misc";
 roll.helpText = "Roll a dice";
 roll.usage = "<sides>";
-roll.callback = function (msg, line) {
+roll.callback = function (msg, line, args, {advantage, disadvantage}) {
   if (line == null || line == "") line = 6;
   line = Number(line);
   if (Number.isNaN(line)) line = 6;
@@ -21,7 +21,19 @@ roll.callback = function (msg, line) {
     return `:coin:: ${res == 1 ? "Heads" : "Tails"}`;
   }
 
+  if (advantage) {
+    const res2 = Math.floor(Math.random() * line);
+    const adv = Math.max(res + 1, res2 + 1);
+
+    return `:game_die: (d${line} with advantage): ${adv}`;
+  } else if (disadvantage) {
+    const res2 = Math.floor(Math.random() * line);
+    const adv = Math.min(res + 1, res2 + 1);
+
+    return `:game_die: (d${line} with disadvantage): ${adv}`;
+  } else {
     return `:game_die: (d${line}): ${1 + res}`;
+  }
 };
 hf.registerCommand(roll);
 
@@ -34,9 +46,25 @@ rollInteraction.options.sides = {
   required: false,
   default: 6,
 };
+rollInteraction.options.advantage = {
+  name: "advantage",
+  type: ApplicationCommandOptionTypes.BOOLEAN,
+  description: "Roll with advantage",
+  required: false,
+  default: false,
+};
+rollInteraction.options.disadvantage = {
+  name: "disadvantage",
+  type: ApplicationCommandOptionTypes.BOOLEAN,
+  description: "Roll with disadvantage",
+  required: false,
+  default: false,
+};
 rollInteraction.callback = async function (interaction) {
   const sides = this.getOption(interaction, "sides");
+  const advantage = this.getOption(interaction, "advantage");
+  const disadvantage = this.getOption(interaction, "disadvantage");
 
-  return roll.callback(interaction, sides);
+  return roll.callback(interaction, sides, [sides], {advantage, disadvantage});
 };
 hf.registerCommand(rollInteraction);