Import other modules into monorepo

src/util/cache/InMemCache.ts

@@ -0,0 +1,41 @@
+import { Cache } from './Cache'
+import { Collection } from '../collection/Collection'
+
+/**
+ * Base interface for an item stored in a memory cache.
+ */
+export interface InMemCacheItem {
+    key: string,
+    item: string,
+}
+
+/**
+ * A cache implementation stored in memory.
+ * @extends Cache
+ */
+export class InMemCache extends Cache {
+    /**
+     * The stored cache items.
+     * @type Collection<InMemCacheItem>
+     */
+    protected items: Collection<InMemCacheItem> = new Collection<InMemCacheItem>()
+
+    public async fetch(key: string) {
+        const item = this.items.firstWhere('key', '=', key)
+        if ( item ) return item.item
+    }
+
+    public async put(key: string, item: string) {
+        const existing = this.items.firstWhere('key', '=', key)
+        if ( existing ) existing.item = item
+        else this.items.push({ key, item })
+    }
+
+    public async has(key: string) {
+        return this.items.where('key', '=', key).length > 0
+    }
+
+    public async drop(key: string) {
+        this.items = this.items.whereNot('key', '=', key)
+    }
+}