cleaner prune function

app/types/db.ts

@@ -1,7 +1,6 @@
 import sqlite3 from "sqlite3";
 import mkdirp from "mkdirp";
 import crypto from "crypto";
-import { FileFilterCallback } from "multer";
 
 mkdirp.sync("./uploads");
 mkdirp.sync("./var/db");
@@ -9,7 +8,8 @@ mkdirp.sync("./var/db");
 export const db = new sqlite3.Database("./var/db/media.db");
 
 export function createUser(username: string, password: string) {
-  var salt = crypto.randomBytes(16);
+  let salt = crypto.randomBytes(16);
+
   db.run("INSERT OR IGNORE INTO users (username, hashed_password, salt) VALUES (?, ?, ?)", [
     username,
     crypto.pbkdf2Sync(password, salt, 310000, 32, "sha256"),
@@ -20,6 +20,7 @@ export function createUser(username: string, password: string) {
 export function getPath(id: number | string) {
   return new Promise((resolve, reject) => {
     let query: string = `SELECT path FROM media WHERE id = ?`;
+
     db.get(query, [id], (err: Error, path: object) => {
       if (err) {reject(err)}
       resolve(path)
@@ -30,6 +31,7 @@ export function getPath(id: number | string) {
 export function deleteId(database: string, id: number | string) {
   return new Promise((resolve, reject) => {
     let query: string = `DELETE FROM ${database} WHERE id = ?`
+
     db.run(query, [id], (err: Error) => {
       if (err) {reject(err); return;}
       resolve(null)
@@ -37,22 +39,40 @@ export function deleteId(database: string, id: number | string) {
   })
 }
 
+export function expire(database: string, column: string, expiration:number) {
+  return new Promise((resolve, reject) => {
+    let query: string = `SELECT * FROM ${database} WHERE ${column} < ?`;
+
+    db.each(query, [expiration], async (err: Error, row: GenericRow) => {
+      await deleteId(database, row.id)
+
+      resolve(null);
+    });
+  })
+}
+
+export interface GenericRow {
+  id? : number | string,
+  username?: string
+  expire? :Date
+}
+
 export interface MediaRow {
-  id? : Number,
-  path: String,
+  id? : number | string,
+  path: string,
   expire: Date,
-  username?: String
+  username?: string
 }
 
 export type MediaParams = [
-  path: String,
+  path: string,
   expire: Date,
-  username?: String
+  username?: string
 ]
 
 export interface UserRow {
   id? : Number,
-  username: String,
+  username: string,
   hashed_password: any,
   salt: any
 }