Create db helper functions.

api/models/db.js

@@ -0,0 +1,55 @@
+const AWS = require(`aws-sdk`);
+const shortid = require(`shortid`);
+
+const dynamodb = new AWS.DynamoDB.DocumentClient({
+	region: process.env.AWS_REGION
+});
+
+const defaultParams = {
+	TableName: process.env.db,
+};
+
+const put = async (kind, item) => {
+	const params = {
+		...defaultParams,
+		Item: {
+			...item,
+			sk: kind,
+			sk2: shortid.generate(),
+			createdAt: Date.now(),
+			updatedAt: Date.now(),
+		}
+	};
+
+	await dynamodb.put(params).promise();
+};
+
+const getByKey = async (key) => {
+	const params = {
+		...defaultParams,
+		KeyConditionExpression: `hk = :hk`,
+		ExpressionAttributeValues: { ':hk': key }
+	};
+
+	return await dynamodb.query(params).promise();
+};
+
+const getById = async (type, id) => {
+	const params = {
+		...defaultParams,
+		IndexName: process.env.dbIndex1,
+		KeyConditionExpression: `sk2 = :sk2 and sk = :sk`,
+		ExpressionAttributeValues: {
+			':sk2': id,
+			':sk': type,
+		}
+	};
+
+	return await dynamodb.query(params).promise();
+};
+
+module.exports = {
+	put,
+	getByKey,
+	getById,
+};