Add unique ID per post and an index to the db for that

src/db.ts

@@ -36,6 +36,7 @@ export function openDatabase(userID:string): Promise<IDBDatabase> {
             if (!db.objectStoreNames.contains(storeName)) {
                 let store = db.createObjectStore(storeName, { keyPath: "id", autoIncrement: true });
                 store.createIndex("datetimeIndex", "post_timestamp", { unique: false });
+                store.createIndex("postIDIndex", "data.post_id", { unique: true });
 
             }
         };

src/main.ts

@@ -16,6 +16,7 @@ declare let marked: any;
 
 class Post {
   post_timestamp: Date;
+  post_id: string;
   author: string;
   author_id: string;
   text: string;
@@ -27,6 +28,7 @@ class Post {
 
   constructor(author: string, author_id: string, text: string, post_timestamp: Date, imageData: ArrayBuffer | null = null, importedFrom: "twitter" | null = null, importSource: any = null) {
     this.post_timestamp = post_timestamp;
+    this.post_id = generateID();
 
     this.author = author;
     this.author_id = author_id;