1 files changed, 66 insertions, 0 deletions
diff --git a/utils/jsonds.ts b/utils/jsonds.ts
new file mode 100644
index 0000000..c717232
--- /dev/null
+++ b/utils/jsonds.ts
@@ -0,0 +1,66 @@
+export class JSONSet<T extends Object> {
+  private items: Set<string>;
+
+  constructor() {
+    this.items = new Set<string>();
+  }
+
+  add(item: T): void {
+    const itemJson = JSON.stringify(item, Object.keys(item).sort());
+    this.items.add(itemJson);
+  }
+
+  has(item: T): boolean {
+    const itemJson = JSON.stringify(item, Object.keys(item).sort());
+    return this.items.has(itemJson);
+  }
+
+  delete(item: T): boolean {
+    const itemJson = JSON.stringify(item, Object.keys(item).sort());
+    return this.items.delete(itemJson);
+  }
+
+  clear(): void {
+    this.items.clear();
+  }
+
+  get size(): number {
+    return this.items.size;
+  }
+}
+
+export class JSONHashMap<T extends Object> {
+  private map: Map<string, T>;
+
+  constructor() {
+    this.map = new Map<string, T>();
+  }
+
+  set(key: T, value: T): void {
+    const keyJson = JSON.stringify(key, Object.keys(key).sort());
+    this.map.set(keyJson, value);
+  }
+
+  get(key: T): T | undefined {
+    const keyJson = JSON.stringify(key, Object.keys(key).sort());
+    return this.map.get(keyJson);
+  }
+
+  has(key: T): boolean {
+    const keyJson = JSON.stringify(key, Object.keys(key).sort());
+    return this.map.has(keyJson);
+  }
+
+  delete(key: T): boolean {
+    const keyJson = JSON.stringify(key, Object.keys(key).sort());
+    return this.map.delete(keyJson);
+  }
+
+  clear(): void {
+    this.map.clear();
+  }
+
+  get size(): number {
+    return this.map.size;
+  }
+}