feat: add sqlstring and supports-color modules

- Introduced sqlstring module for SQL escape and formatting.
- Added supports-color module to detect terminal color support.
- Created dashboard and login views with Bootstrap styling.
- Implemented user schema in SQL with mock data for testing.

backend/node_modules/mysql2/promise.js

@@ -0,0 +1,202 @@
+'use strict';
+
+const SqlString = require('sqlstring');
+const EventEmitter = require('events').EventEmitter;
+const parserCache = require('./lib/parsers/parser_cache.js');
+const PoolCluster = require('./lib/pool_cluster.js');
+const createConnection = require('./lib/create_connection.js');
+const createPool = require('./lib/create_pool.js');
+const createPoolCluster = require('./lib/create_pool_cluster.js');
+const PromiseConnection = require('./lib/promise/connection.js');
+const PromisePool = require('./lib/promise/pool.js');
+const makeDoneCb = require('./lib/promise/make_done_cb.js');
+const PromisePoolConnection = require('./lib/promise/pool_connection.js');
+const inheritEvents = require('./lib/promise/inherit_events.js');
+const PromisePoolNamespace = require('./lib/promise/pool_cluster');
+
+function createConnectionPromise(opts) {
+  const coreConnection = createConnection(opts);
+  const createConnectionErr = new Error();
+  const thePromise = opts.Promise || Promise;
+  if (!thePromise) {
+    throw new Error(
+      'no Promise implementation available.' +
+        'Use promise-enabled node version or pass userland Promise' +
+        " implementation as parameter, for example: { Promise: require('bluebird') }"
+    );
+  }
+  return new thePromise((resolve, reject) => {
+    coreConnection.once('connect', () => {
+      resolve(new PromiseConnection(coreConnection, thePromise));
+    });
+    coreConnection.once('error', (err) => {
+      createConnectionErr.message = err.message;
+      createConnectionErr.code = err.code;
+      createConnectionErr.errno = err.errno;
+      createConnectionErr.sqlState = err.sqlState;
+      reject(createConnectionErr);
+    });
+  });
+}
+
+// note: the callback of "changeUser" is not called on success
+// hence there is no possibility to call "resolve"
+
+function createPromisePool(opts) {
+  const corePool = createPool(opts);
+  const thePromise = opts.Promise || Promise;
+  if (!thePromise) {
+    throw new Error(
+      'no Promise implementation available.' +
+        'Use promise-enabled node version or pass userland Promise' +
+        " implementation as parameter, for example: { Promise: require('bluebird') }"
+    );
+  }
+
+  return new PromisePool(corePool, thePromise);
+}
+
+class PromisePoolCluster extends EventEmitter {
+  constructor(poolCluster, thePromise) {
+    super();
+    this.poolCluster = poolCluster;
+    this.Promise = thePromise || Promise;
+    inheritEvents(poolCluster, this, ['warn', 'remove', 'online', 'offline']);
+  }
+
+  getConnection(pattern, selector) {
+    const corePoolCluster = this.poolCluster;
+    return new this.Promise((resolve, reject) => {
+      corePoolCluster.getConnection(
+        pattern,
+        selector,
+        (err, coreConnection) => {
+          if (err) {
+            reject(err);
+          } else {
+            resolve(new PromisePoolConnection(coreConnection, this.Promise));
+          }
+        }
+      );
+    });
+  }
+
+  query(sql, args) {
+    const corePoolCluster = this.poolCluster;
+    const localErr = new Error();
+    if (typeof args === 'function') {
+      throw new Error(
+        'Callback function is not available with promise clients.'
+      );
+    }
+    return new this.Promise((resolve, reject) => {
+      const done = makeDoneCb(resolve, reject, localErr);
+      corePoolCluster.query(sql, args, done);
+    });
+  }
+
+  execute(sql, args) {
+    const corePoolCluster = this.poolCluster;
+    const localErr = new Error();
+    if (typeof args === 'function') {
+      throw new Error(
+        'Callback function is not available with promise clients.'
+      );
+    }
+    return new this.Promise((resolve, reject) => {
+      const done = makeDoneCb(resolve, reject, localErr);
+      corePoolCluster.execute(sql, args, done);
+    });
+  }
+
+  of(pattern, selector) {
+    return new PromisePoolNamespace(
+      this.poolCluster.of(pattern, selector),
+      this.Promise
+    );
+  }
+
+  end() {
+    const corePoolCluster = this.poolCluster;
+    const localErr = new Error();
+    return new this.Promise((resolve, reject) => {
+      corePoolCluster.end((err) => {
+        if (err) {
+          localErr.message = err.message;
+          localErr.code = err.code;
+          localErr.errno = err.errno;
+          localErr.sqlState = err.sqlState;
+          localErr.sqlMessage = err.sqlMessage;
+          reject(localErr);
+        } else {
+          resolve();
+        }
+      });
+    });
+  }
+}
+
+/**
+ * proxy poolCluster synchronous functions
+ */
+(function (functionsToWrap) {
+  for (let i = 0; functionsToWrap && i < functionsToWrap.length; i++) {
+    const func = functionsToWrap[i];
+
+    if (
+      typeof PoolCluster.prototype[func] === 'function' &&
+      PromisePoolCluster.prototype[func] === undefined
+    ) {
+      PromisePoolCluster.prototype[func] = (function factory(funcName) {
+        return function () {
+          return PoolCluster.prototype[funcName].apply(
+            this.poolCluster,
+            arguments
+          );
+        };
+      })(func);
+    }
+  }
+})(['add', 'remove']);
+
+function createPromisePoolCluster(opts) {
+  const corePoolCluster = createPoolCluster(opts);
+  const thePromise = (opts && opts.Promise) || Promise;
+  if (!thePromise) {
+    throw new Error(
+      'no Promise implementation available.' +
+        'Use promise-enabled node version or pass userland Promise' +
+        " implementation as parameter, for example: { Promise: require('bluebird') }"
+    );
+  }
+  return new PromisePoolCluster(corePoolCluster, thePromise);
+}
+
+exports.createConnection = createConnectionPromise;
+exports.createPool = createPromisePool;
+exports.createPoolCluster = createPromisePoolCluster;
+exports.escape = SqlString.escape;
+exports.escapeId = SqlString.escapeId;
+exports.format = SqlString.format;
+exports.raw = SqlString.raw;
+exports.PromisePool = PromisePool;
+exports.PromiseConnection = PromiseConnection;
+exports.PromisePoolConnection = PromisePoolConnection;
+
+exports.__defineGetter__('Types', () => require('./lib/constants/types.js'));
+
+exports.__defineGetter__('Charsets', () =>
+  require('./lib/constants/charsets.js')
+);
+
+exports.__defineGetter__('CharsetToEncoding', () =>
+  require('./lib/constants/charset_encodings.js')
+);
+
+exports.setMaxParserCache = function (max) {
+  parserCache.setMaxCache(max);
+};
+
+exports.clearParserCache = function () {
+  parserCache.clearCache();
+};