From 8c703e999f6cc8190204d6525d3d43e873203ed1 Mon Sep 17 00:00:00 2001
From: michellelin1 <michellelin810@gmail.com>
Date: Mon, 27 Nov 2023 12:35:53 -0800
Subject: [PATCH] added connection to db

---
 app.js          |  3 +++
 common/utils.js | 55 +++++++++++++++++++++++++++++++++++++++++++++++++
 package.json    |  3 +++
 server/db.js    | 15 ++++++++++++++
 4 files changed, 76 insertions(+)
 create mode 100644 common/utils.js
 create mode 100644 server/db.js

diff --git a/app.js b/app.js
index 7419cb1..18fd6c7 100644
--- a/app.js
+++ b/app.js
@@ -13,6 +13,9 @@ app.use(
   }),
 );
 
+// add all routes under here
+app.use(express.json()); // for req.body
+
 app.listen(PORT, () => {
   console.log(`Server listening on ${PORT}`);
 });
diff --git a/common/utils.js b/common/utils.js
new file mode 100644
index 0000000..14fad66
--- /dev/null
+++ b/common/utils.js
@@ -0,0 +1,55 @@
+// toCamel, isArray, and isObject are helper functions used within utils only
+const toCamel = (s) => {
+  return s.replace(/([-_][a-z])/g, ($1) => {
+    return $1.toUpperCase().replace('-', '').replace('_', '');
+  });
+};
+
+const isArray = (a) => {
+  return Array.isArray(a);
+};
+
+const isISODate = (str) => {
+  try {
+    const ISOString = str.toISOString();
+    if (!/\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}.\d{3}Z/.test(ISOString)) return false;
+    const d = new Date(ISOString);
+    return d.toISOString() === ISOString;
+  } catch (err) {
+    return false;
+  }
+};
+
+const isObject = (o) => {
+  return o === Object(o) && !isArray(o) && typeof o !== 'function' && !isISODate(o);
+};
+
+// Database columns are in snake case. JavaScript is suppose to be in camel case
+// This function converts the keys from the sql query to camel case so it follows JavaScript conventions
+const keysToCamel = (data) => {
+  if (isObject(data)) {
+    const newData = {};
+    Object.keys(data).forEach((key) => {
+      newData[toCamel(key)] = keysToCamel(data[key]);
+    });
+    return newData;
+  }
+  if (isArray(data)) {
+    return data.map((i) => {
+      return keysToCamel(i);
+    });
+  }
+  if (
+    typeof data === 'string' &&
+    data.length > 0 &&
+    data[0] === '{' &&
+    data[data.length - 1] === '}'
+  ) {
+    let parsedList = data.replaceAll('"', '');
+    parsedList = parsedList.slice(1, parsedList.length - 1).split(',');
+    return parsedList;
+  }
+  return data;
+};
+
+module.exports = { keysToCamel };
diff --git a/package.json b/package.json
index c5b52f1..5531bc8 100644
--- a/package.json
+++ b/package.json
@@ -23,7 +23,10 @@
     "eslint-plugin-import": "^2.25.2",
     "eslint-plugin-prettier": "^4.0.0",
     "express": "^4.17.1",
+    "express-promise-router": "^4.1.1",
     "nodemon": "^2.0.14",
+    "pg": "^8.8.0",
+    "pg-promise": "^10.12.1",
     "prettier": "^2.4.1"
   },
   "devDependencies": {
diff --git a/server/db.js b/server/db.js
new file mode 100644
index 0000000..07490a8
--- /dev/null
+++ b/server/db.js
@@ -0,0 +1,15 @@
+const pgp = require('pg-promise')({});
+require('dotenv').config();
+
+const db = pgp({
+  host: process.env.AWS_HOST,
+  user: process.env.AWS_USER,
+  password: process.env.AWS_PASSWORD,
+  port: process.env.AWS_PORT,
+  database: process.env.AWS_DB_NAME,
+  ssl: {
+    rejectUnauthorized: false,
+  },
+});
+
+module.exports = { db, pgp };