malice

import type { ImagePack, QuickReaction } from './types';

export type DisabledPackImages = Record<string, string[]>;

function isRecord(value: unknown): value is Record<string, unknown> {

  return typeof value === 'object' && value !== null && !Array.isArray(value);

}

function setOwn<T>(record: Record<string, T>, key: string, value: T): void {

  Object.defineProperty(record, key, {

    configurable: true,

    enumerable: true,

    value,

    writable: true

  });

}

function hasOwn(record: object, key: string): boolean {

  return Object.prototype.hasOwnProperty.call(record, key);

}

export function parseDisabledPackImages(raw: unknown): DisabledPackImages {

  if (!isRecord(raw) || !isRecord(raw['disabled'])) return {};

  const disabled: DisabledPackImages = {};

  for (const [packId, rawShortcodes] of Object.entries(raw['disabled'])) {

    if (!Array.isArray(rawShortcodes)) continue;

    const seen = new Set<string>();

    const shortcodes = rawShortcodes.filter((value): value is string => {

      if (typeof value !== 'string' || value.length === 0 || seen.has(value)) return false;

      seen.add(value);

      return true;

    });

    if (shortcodes.length > 0) setOwn(disabled, packId, shortcodes);

  }

  return disabled;

}

export function imageEnabled(disabled: DisabledPackImages, packId: string, shortcode: string): boolean {

  return !hasOwn(disabled, packId) || !disabled[packId].includes(shortcode);

}

export function withImageEnabled(

  disabled: DisabledPackImages,

  packId: string,

  shortcode: string,

  enabled: boolean

): DisabledPackImages {

  const current = hasOwn(disabled, packId) ? disabled[packId] : [];

  const nextShortcodes = enabled

    ? current.filter((item) => item !== shortcode)

    : current.includes(shortcode) ? [...current] : [...current, shortcode];

  if (nextShortcodes.length === current.length && nextShortcodes.every((item, index) => item === current[index])) {

    return disabled;

  }

  const next = { ...disabled };

  if (nextShortcodes.length === 0) delete next[packId];

  else setOwn(next, packId, nextShortcodes);

  return next;

}

export function enabledPacks(packs: ImagePack[], disabled: DisabledPackImages): ImagePack[] {

  return packs.map((pack) => ({

    ...pack,

    images: pack.images.filter((image) => imageEnabled(disabled, pack.id, image.shortcode))

  }));

}

export function enabledQuickReactions(

  quick: QuickReaction[],

  packs: ImagePack[],

  disabled: DisabledPackImages

): QuickReaction[] {

  const hidden = new Set<string>();

  const enabled = new Set<string>();

  for (const pack of packs) {

    for (const image of pack.images) {

      (imageEnabled(disabled, pack.id, image.shortcode) ? enabled : hidden).add(image.reaction_key);

    }

  }

  return quick.filter((reaction) => !hidden.has(reaction.key) || enabled.has(reaction.key));

}