InsertTaskController.ts
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McMaster. Software Engineer with a keen interest in blockchain and web3.
import { Request, Response } from 'express';
import fileReader from '../util/fileReader';
import fileWriter from '../util/fileWriter';
import setLRUCache from '../util/setLRUCache';
import ItemType from '../dataTypes/ItemType';
import { v4 as uuid } from 'uuid';
// LRU data is within the database and is stored as { LRU: [] }
export default async function insertTask(req: Request, res: Response){
const { task } = JSON.parse(req.body.body);
try {
// Fetch file information and set the LRU Cache
const readFileResponse = await fileReader();
let LRUCache = setLRUCache(readFileResponse);
// Add new key-value pair to the LRU Cache
// Make use of the UUID library for unique keys
// Write data back to database
LRUCache.set(uuid().split("-")[0], task);
let fileObject: ItemType[] = [];
const keyMapKeys = Array.from(LRUCache.getLRUCacheKeyMap().keys());
// Make use of the LRU Cache Key Map and iterate through it to access each key for its value
for (let item = 0; item < keyMapKeys.length; item++){
let task = LRUCache.getLRUCacheKeyMap().get(keyMapKeys[item]);
fileObject.push({ id: keyMapKeys[item], description: task });
}
// Write modified LRU Cache to file
await fileWriter(fileObject);
res.status(200).json({
message: "Insertion complete!"
});
}
catch(err) {
res.status(400).json({
message: "Could not insert data. ERROR: " + err
});
}
}