queryBook and createBook are working

server/type-handlers/book-handlers.js

@@ -0,0 +1,105 @@
+const { Book } = require('../database/models');
+
+//utils
+const checkDateFormat = date => /(19\d{2}|20\d{2})[-\/.](0[1-9]|1[012])[-\/.](0[1-9]|[12][0-9]|3[01])/.test(date);
+
+const queryBook = async (query, typeGraph) => {
+	//sequelize stuff to find
+	const attributes = [];
+
+	//specify fields to find
+	Object.keys(query)
+		.filter(key => key != 'typeName') //filter out this meta-field
+		.forEach(key => {
+			//check published date
+			if (key == 'published' && !checkDateFormat(query[key].match)) {
+				throw 'Wrong date format for published';
+			}
+
+			//all book members should be scalar
+			if (query[key].scalar) {
+				//push this key into the attributes list
+				attributes.push(key);
+			}
+		})
+	;
+
+	//search the database
+	const result = await Book.findAll({
+		attributes: attributes
+	});
+
+	//finally
+	return result;
+};
+
+const createBook = async (query, typeGraph) => {
+	//the array of objects to insert
+	const inserts = [];
+
+	query.forEach((q, idx) => {
+		//just in case
+		if (!q.create) {
+			throw 'Unexpected create == false';
+		}
+
+		//specify fields to create
+		Object.keys(q)
+			.filter(key => key != 'typeName' && key != 'create') //filter out this meta-field
+			.forEach(key => {
+				//check published date
+				if (key == 'published' && !checkDateFormat(q[key].create)) {
+					throw 'Wrong date format for published';
+				}
+
+				//all book members should be scalar
+				if (q[key].scalar) {
+					//make sure this exists
+					inserts[idx] = inserts[idx] || {};
+
+					//push this key into the inserts list
+					inserts[idx][key] = q[key].create;
+				}
+			})
+		;
+	});
+
+	//insert into the database
+	const results = await Book.bulkCreate(inserts, { fields: ['title', 'published']});
+
+	//determine what fields to return
+	const returns = [];
+
+	query.map((q, idx) => {
+		//make sure it exists
+		returns[idx] = returns[idx] || {};
+
+		//specify fields to return in each record
+		const keys = Object.keys(q)
+			.filter(key => key != 'typeName' && key != 'create') //filter out this meta-field
+			.forEach(key => {
+				if (q[key].scalar) {
+					returns[idx][key] = results[idx][key];
+				}
+			})
+		;
+	});
+
+	//finally
+	return returns;
+};
+
+const updateBook = async (query, typeGraph) => {
+	throw 'Not yet implemented';
+};
+
+const deleteBook = async (query, typeGraph) => {
+	throw 'Not yet implemented';
+};
+
+module.exports = {
+	queryBook,
+	createBook,
+	updateBook,
+	deleteBook,
+};