UpdateTaskController.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';
export default async function updateTask(req: Request, res: Response){
const { updateID, description } = JSON.parse(req.body.body);
try {
// Set LRU Cache and then proceed to delete entry
// Re-write updated LRU Cache to database
const fileData = await fileReader();
let LRUCache = setLRUCache(fileData);
// Update key with new description
// Finally, write the LRU Cache back to database
LRUCache.set(updateID, description);
let fileObject: ItemType[] = [];
let keysArrangement = LRUCache.getLRUCache();
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(keysArrangement[item]);
fileObject.push({ id: keysArrangement[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 update task. ERROR: " + err
});
}
}