improve local db utils
Signed-off-by: Arthur Lu <learthurgo@gmail.com>
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22
db.js
22
db.js
@ -23,7 +23,7 @@ function init () {
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* @returns {boolean} whether the user is approved to allocate requested resources
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* @returns {boolean} whether the user is approved to allocate requested resources
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*/
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*/
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function requestResources (user, resources) {
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function requestResources (user, resources) {
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Object.keys(resources).forEach((element) => {
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Object.keys(db[user]).forEach((element) => {
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if (db[user][element] < resources[element]) {
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if (db[user][element] < resources[element]) {
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return false;
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return false;
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}
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}
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@ -38,14 +38,18 @@ function requestResources (user, resources) {
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* @returns {boolean} true if resources were successfully allocated, false otherwise
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* @returns {boolean} true if resources were successfully allocated, false otherwise
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*/
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*/
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function allocateResources (user, resources) {
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function allocateResources (user, resources) {
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Object.keys(resources).forEach((element) => {
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let newdb = {};
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db[user][element] -= resource[element];
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Object.assign(newdb, db);
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Object.keys(db[user]).forEach((element) => {
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newdb[user][element] -= resource[element];
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});
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});
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try {
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try {
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fs.writeFileSync(filename, db);
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fs.writeFileSync(filename, newdb);
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Object.assign(db, newdb);
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return true;
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return true;
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}
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}
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catch {
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catch {
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fs.writeFileSync(filename, db)
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return false;
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return false;
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}
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}
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}
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}
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@ -57,14 +61,18 @@ function allocateResources (user, resources) {
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* @returns {boolean} true if resources were successfully deallocated, false otherwise
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* @returns {boolean} true if resources were successfully deallocated, false otherwise
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*/
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*/
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function releaseResources (user, resources) {
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function releaseResources (user, resources) {
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Object.keys(resources).forEach((element) => {
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let newdb = {};
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db[user][element] += resource[element];
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Object.assign(newdb, db);
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Object.keys(db[user]).forEach((element) => {
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newdb[user][element] += resource[element];
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});
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});
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try {
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try {
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fs.writeFileSync(filename, db);
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fs.writeFileSync(filename, newdb);
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Object.assign(db, newdb);
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return true;
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return true;
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}
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}
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catch {
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catch {
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fs.writeFileSync(filename, db)
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return false;
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return false;
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}
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}
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}
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}
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