slight behavior redesign progress

src/lib/db.ts

@@ -91,4 +91,9 @@ export interface InitHealth {
 export interface InvincibleUser {
   user: string,
   since: number,
+}
+export interface ItemBehavior {
+  item: number,
+  behavior: string,
+  value?: number
 }

src/lib/rpg/behaviors.ts

@@ -1,26 +1,78 @@
-import type { User } from 'discord.js';
-import type { Item } from './items';
+import { giveItem, type Item, isDefaultItem } from './items';
+import { Either, Left } from '../util';
+import { ItemBehavior, db } from '../db';
+import { BLOOD_ITEM, dealDamage } from './pvp';
 
 export interface Behavior {
   name: string,
   description: string,
   itemType: 'plain' | 'weapon' | 'consumable',
+  // make it look fancy
+  format?: (value: number) => string,
   // triggers upon use
-  // for 'weapons', this is on hit
-  // for 'consumable', this is on use
-  // for 'plain', ...??
-  // returns `true` upon success, `false` otherwise
-  action?: (item: Item, user: User) => Promise<boolean>
+  // for 'weapons', this is on attack
+  // for 'consumable' and `plain`, this is on use
+  // returns Left upon success, the reason for failure otherwise (Right)
+  onUse?: (value: number, item: Item, user: string) => Promise<Either<null, string>>,
+  // triggers upon `weapons` attack
+  // returns the new damage value upon success (Left), the reason for failure otherwise (Right)
+  onAttack?: (value: number, item: Item, user: string, target: string, damage: number) => Promise<Either<number, string>>,
 }
 
 export const behaviors: Behavior[] = [
   {
     name: 'heal',
-    description: 'Heals the user by `behaviorValue`',
+    description: 'Heals the user by `value`',
     itemType: 'consumable',
-    action: async (item, user) => {
-      // todo
-      return false;
-    }
+    async onUse(value, item, user) {
+      await dealDamage(user, -Math.floor(value));
+      return new Left(null);
+    },
+  },
+  {
+    name: 'damage',
+    description: 'Damages the user by `value',
+    itemType: 'consumable',
+    async onUse(value, item, user) {
+      await dealDamage(user, Math.floor(value));
+      return new Left(null);
+    },
+  },
+  {
+    name: 'random_up',
+    description: 'Randomizes the attack value up by a maximum of `value`',
+    itemType: 'weapon',
+    format: (value) => `random +${value}`,
+    async onAttack(value, item, user, target, damage) {
+      return new Left(damage + Math.round(Math.random() * value));
+    },
+  },
+  {
+    name: 'random_down',
+    description: 'Randomizes the attack value down by a maximum of `value`',
+    itemType: 'weapon',
+    format: (value) => `random -${value}`,
+    async onAttack(value, item, user, target, damage) {
+      return new Left(damage - Math.round(Math.random() * value));
+    },
+  },
+  {
+    name: 'lifesteal',
+    description: 'Gain blood by stabbing your foes, scaled by `value`x',
+    itemType: 'weapon',
+    format: (value) => `lifesteal: ${value}x`,
+    async onAttack(value, item, user, target, damage) {
+      giveItem(user, BLOOD_ITEM, Math.floor(damage * value));
+      return new Left(damage);
+    },
   }
-];
+];
+
+export async function getBehaviors(item: Item) {
+  if (isDefaultItem(item)) {
+    return item.behaviors || [];
+  } else {
+    return await db<ItemBehavior>('itemBehaviors')
+      .where('item', item.id);
+  }
+}

src/lib/rpg/items.ts

@@ -1,8 +1,8 @@
 import { AutocompleteInteraction } from 'discord.js';
-import { CustomItem, ItemInventory, db } from '../db';
+import { CustomItem, ItemBehavior, ItemInventory, db } from '../db';
 
 // uses negative IDs
-export type DefaultItem = Omit<CustomItem, 'guild'>;
+export type DefaultItem = Omit<CustomItem, 'guild'> & { behaviors?: Omit<ItemBehavior, 'item'>[] };
 export type Item = DefaultItem | CustomItem;
 
 export interface Items {
@@ -362,6 +362,10 @@ export function getMaxStack(item: Item) {
   return item.type === 'weapon' ? 1 : item.maxStack;
 }
 
+export function isDefaultItem(item: Item): item is DefaultItem {
+  return (item as DefaultItem).behaviors !== undefined; // ough
+}
+
 export function formatItem(item: Item | undefined, disableBold = false) {
   if (!item) return disableBold ? '? MISSINGNO' : '? **MISSINGNO**';
   return disableBold ? `${item.emoji} ${item.name}` : `${item.emoji} **${item.name}**`;

src/lib/util.ts

@@ -27,4 +27,17 @@ export async function writeTmpFile(data: string | Buffer, filename?: string, ext
 
 export function pickRandom<T>(list: T[]): T {
   return list[Math.floor(Math.random() * list.length)];
-}
+}
+
+// WE OUT HERE
+export type Either<L,R> = Left<L> | Right<R>
+
+export class Left<L> {
+  constructor(private readonly value: L) {}
+  public getValue() { return this.value; }
+}
+
+export class Right<R> {
+  constructor(private readonly value: R) {}
+  public getValue() { return this.value; }
+}