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all.js
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all.js
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const { createHmac } = require("crypto");
const fs = require("fs");
const path = require("path");
const basedir = path.join(__dirname, './');
const create = (dir, file, data, callback) => {
fs.open(`${basedir + dir}/${file}.json`, "wx", (err, fileDescriptor) => {
if (!err && fileDescriptor) {
const stringData = JSON.stringify(data);
fs.writeFile(fileDescriptor, stringData, (err2) => {
if (!err2) {
fs.close(fileDescriptor, (err3) => {
if (!err3) {
callback(false);
} else {
callback("Error closing the new file!");
}
});
} else {
callback("Error writing to new file!");
}
});
} else {
callback("There was an error, file may already exists!");
}
});
};
const read = (dir, file, callback = (error, data) => {}) => {
fs.readFile(`${basedir + dir}/${file}.json`, "utf8", (err, data) => {
callback(err, data);
});
};
const update = (dir, file, data, callback) => {
fs.open(`${basedir + dir}/${file}.json`, "r+", (err, fileDescriptor) => {
if (!err && fileDescriptor) {
const stringData = JSON.stringify(data);
fs.ftruncate(fileDescriptor, (err1) => {
if (!err1) {
fs.writeFile(fileDescriptor, stringData, (err2) => {
if (!err2) {
fs.close(fileDescriptor, (err3) => {
if (!err3) {
callback(false);
} else {
callback("Error closing file!");
}
});
} else {
callback("Error writing to file!");
}
});
} else {
callback("Error truncating file!");
}
});
} else {
console.log(`Error updating. File may not exist`);
}
});
};
const del = (dir, file, callback) => {
fs.unlink(`${basedir + dir}/${file}.json`, (err) => {
if (!err) {
callback(false);
} else {
callback(`Error deleting file`);
}
});
};
const genHash = (str) => {
const secret = "jsondatasaver";
if (typeof (str === "string") && str.length > 0) {
const hash = createHmac("sha256", secret).update(str).digest("hex");
return hash;
}
return false;
};
const compareHash = (str, hashPass = "") => {
const secret = "jsondatasaver";
const hash = createHmac("sha256", secret).update(str).digest("hex");
return hash === hashPass;
};
const jds = {
create,
read,
update,
del,
genHash,
compareHash,
};
module.exports = { genHash, compareHash };
module.exports = jds;