feat: remove datastores and implement Managers (#3696)

* Initial commit: add 5 initial managers

- Base manager
- GuildChannelManager
- MessageManager
- PresenceManager
- Reaction Manager
- Added LimitedCollection

* Add GuildEmojiManager, various fixes

* Modify some managers and add guildmembermanager

* Initial integration

* Delete old stores

* Integration part two, removed LRUCollection

- Most of the integration has been finished
- TODO typings
- Removed LRUCollection, needless sweeping

* Typings + stuff i somehow missed in ChannelManager

* LimitedCollection typings/ final changes

* Various jsdoc and syntactical fixes, Removed Util.mixin()

* tslint fix

* Grammatical and logical changes

* Delete temporary file placed by mistake

* Grammatical changes

* Add missing type

* Update jsdoc examples

* fix: ChannelManager#remove should call cache#delete not cache#remove

* fix recursive require

* Fix missed cache in util

* fix: more missed cache

* Remove accidental _fetchMany change from #3645

* fix: use .cache.delete() over .remove()

* fix: missing cache in ReactionCollector

* fix: missed cache in client

* fix: members is a collection not a manager

Co-Authored-By: Sugden <28943913+NotSugden@users.noreply.github.com>

* fix: various docs and cache fixes

* fix: missed cache

* fix: missing _roles

* Final testing and debugging

* LimitedCollection: return the Collection instead of undefined on .set

* Add cache to BaseManager in typings

* Commit fixes i forgot to stage yesterday

* Update invite events

* Account for new commit

* fix: MessageReactionRemoveAll should call .cache.clear()

* fix: add .cache at various places, correct return type

* docs: remove mentions of 'store'

* Add extra documented properties to typings

Co-authored-by: Sugden <28943913+NotSugden@users.noreply.github.com>
Co-authored-by: SpaceEEC <spaceeec@yahoo.com>

src/managers/PresenceManager.js

@@ -0,0 +1,60 @@
+'use strict';
+
+const { Presence } = require('../structures/Presence');
+const BaseManager = require('./BaseManager');
+
+/**
+ * Manages API methods for Presences and holds their cache.
+ * @extends {BaseManager}
+ */
+class PresenceManager extends BaseManager {
+  constructor(client, iterable) {
+    super(client, iterable, Presence);
+  }
+
+  /**
+  * The cache of Presences
+  * @property {Collection<Snowflake, Presence>} cache
+  * @memberof PresenceManager
+  * @instance
+  */
+
+  add(data, cache) {
+    const existing = this.cache.get(data.user.id);
+    return existing ? existing.patch(data) : super.add(data, cache, { id: data.user.id });
+  }
+
+  /**
+   * Data that can be resolved to a Presence object. This can be:
+   * * A Presence
+   * * A UserResolvable
+   * * A Snowflake
+   * @typedef {Presence|UserResolvable|Snowflake} PresenceResolvable
+   */
+
+  /**
+    * Resolves a PresenceResolvable to a Presence object.
+    * @param {PresenceResolvable} presence The presence resolvable to resolve
+    * @returns {?Presence}
+    */
+  resolve(presence) {
+    const presenceResolvable = super.resolve(presence);
+    if (presenceResolvable) return presenceResolvable;
+    const UserResolvable = this.client.users.resolveID(presence);
+    return super.resolve(UserResolvable) || null;
+  }
+
+  /**
+    * Resolves a PresenceResolvable to a Presence ID string.
+    * @param {PresenceResolvable} presence The presence resolvable to resolve
+    * @returns {?Snowflake}
+    */
+  resolveID(presence) {
+    const presenceResolvable = super.resolveID(presence);
+    if (presenceResolvable) return presenceResolvable;
+    const userResolvable = this.client.users.resolveID(presence);
+    return this.cache.has(userResolvable) ? userResolvable : null;
+  }
+}
+
+module.exports = PresenceManager;