95 lines
2.9 KiB
JavaScript
95 lines
2.9 KiB
JavaScript
const fs = require("fs");
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const parseDbResults = require("./parseDbResults");
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/**
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* DB handler for specific database
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* ==============================================================================
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* @async
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* @param {object} params - Single object params
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* @param {string} params.queryString - SQL string
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* @param {string[]?} params.queryValuesArray - Values Array
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* @param {string} params.database - Database name
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* @param {DSQL_TableSchemaType?} params.tableSchema - Table schema
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* @param {string} params.dbHost - Database host
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* @param {string} params.dbUsername - Database username
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* @param {string} params.dbPassword - Database password
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* @param {string?} params.encryptionKey - Encryption key
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* @param {string?} params.encryptionSalt - Encryption salt
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*
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* @returns {Promise<object[]|null>}
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*/
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async function handler({ queryString, queryValuesArray, database, tableSchema, dbHost, dbUsername, dbPassword, encryptionKey, encryptionSalt }) {
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const mysql = require("serverless-mysql")({
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config: {
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host: dbHost,
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user: dbUsername,
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password: dbPassword,
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database: database.toString().replace(/[^a-z0-9\_\-]/g, ""),
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charset: "utf8mb4",
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},
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});
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/**
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* Declare variables
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*
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* @description Declare "results" variable
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*/
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let results;
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/**
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* Check if query values array is an array
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*/
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if (!queryString || !queryValuesArray || !Array.isArray(queryValuesArray) || !queryValuesArray[0]) {
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return null;
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}
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/**
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* Fetch from db
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*
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* @description Fetch data from db if no cache
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*/
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try {
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/**
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* Run Query
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*/
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results = await mysql.query(queryString, queryValuesArray);
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/**
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* Clean up
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*/
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await mysql.end();
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} catch (error) {
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/**
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* Handle error and clean up
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*/
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console.log("\x1b[31mDSQL Database Handler ERROR\x1b[0m =>", database, error.message);
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/**
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* Clean up
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*/
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await mysql.end();
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}
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/**
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* Return results
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*
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* @description Return results add to cache if "req" param is passed
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*/
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if (results && tableSchema) {
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try {
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const unparsedResults = JSON.parse(JSON.stringify(results));
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const parsedResults = await parseDbResults({ unparsedResults: unparsedResults, tableSchema: tableSchema, encryptionKey, encryptionSalt });
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return parsedResults;
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} catch (error) {
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console.log("\x1b[31mDSQL Database Handler ERROR\x1b[0m =>", database, error.message);
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return null;
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}
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} else if (results) {
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return JSON.parse(JSON.stringify(results));
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} else {
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console.log("\x1b[31mDSQL Database Handler No results returned\x1b[0m =>", results);
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return null;
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}
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}
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module.exports = handler;
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