Working on test framework

README.md

@@ -138,8 +138,9 @@ The fields can be altered as well, using the query language's built-in keywords:
 * delete
 * match
 * set
+* typeName
 
-`create`, `update` and `delete` work as expected.
+`create`, `update` and `delete` are still to be defined properly, but they'll probably work like this:
 
 ### Create
 

source/build-type-graph.js

@@ -7,10 +7,10 @@ const parseInput = require('./parse-input');
 const buildTypeGraph = (schema, options) => {
 	//the default graph
 	let graph = {
-		String: { scalar: true },
-		Integer: { scalar: true },
-		Float: { scalar: true },
-		Boolean: { scalar: true },
+		String: { typeName: 'String', scalar: true },
+		Integer: { typeName: 'Integer', scalar: true },
+		Float: { typeName: 'Float', scalar: true },
+		Boolean: { typeName: 'Boolean', scalar: true },
 	};
 
 	//parse the schema
@@ -35,7 +35,7 @@ const buildTypeGraph = (schema, options) => {
 					throw 'Unexpected keyword ' + tokens[pos];
 				}
 
-				graph[tokens[pos++]] = { scalar: true };
+				graph[tokens[pos++]] = { typeName: tokens[pos - 1], scalar: true };
 
 				if (options.debug) {
 					console.log(`Defined ${tokens[pos - 1]}:\n`, graph[tokens[pos - 1]]);
@@ -63,7 +63,7 @@ const parseCompoundType = (tokens, pos, scalars, options) => {
 	}
 
 	//graph component to be returned
-	const compound = {};
+	const compound = { typeName: tokens[pos - 1] };
 
 	//for each line of the compound type
 	while (tokens[pos++] && tokens[pos] !== '}') {

source/keywords.json

@@ -1 +1 @@
-["type", "scalar", "create", "update", "delete", "set", "match"]
+["type", "scalar", "create", "update", "delete", "set", "match", "typeName"]

test/index.js

@@ -1,7 +1,122 @@
-//the library to test
-const sineQL = require('../source/index.js');
+//mock tools
+const books = {
+	findAll: async args => {
+		let arr = [
+			{ title: 'The Wind in the Willows', published: '1908-06-15' }
+		];
 
-//the dummy values
+		const { attributes, where } = args;
+
+		arr = arr.filter(el => !where || el.title == where.title || el.published == where.published); //TODO: fix this
+
+		return arr;
+	}
+}
+
+const authors = {
+	findAll: async args => {
+		const arr = [
+			{ name: 'Kenneth Grahame', bookIds: [1] },
+		];
+
+		const { attributes, where } = args;
+
+		arr = arr.filter(el => !where || el.title == where.title || el.published == where.published); //TODO: fix this
+
+		return arr;
+	}
+}
+
+//the handler functions return arrays for each type, containing every element that satisfies the queries
+
+//the "query" argument contains the object built from the sineQL query
+//the "graph" argument contains the typeGraph
+
+//the task of the handler functions is to query the database, and return the correct results
+
+/* possible values for "query" include:
+
+{
+	typeName: 'Author',
+	name: { typeName: 'String', scalar: true, match: 'Kenneth Grahame' },
+	books: { typeName: 'Book', match: {
+		typeName: 'Book',
+		title: { typeName: 'String', scalar: true, match: 'The wind in the Willows' }
+		published: { typeName: 'Date', scalar: true }
+	}
+}
+
+*/
+
+//depth-first search seems to be the best option
+//Each query shouldn't know if it's a sub-query
+
+const handler = {
+	//complex compound
+	Author: async (query, graph) => {
+		//get the fields alone
+		const { typeName, ...fields } = query;
+
+		//get the names of matched fields
+		const matchedNames = Object.keys(fields.filter(field => field.match));
+
+		//short-circuit if querying everything
+		const where = {};
+		if (matchedNames.length > 0) {
+			//build the "where" object
+			matchedNames.forEach(mn => {
+				where[mn] = {
+					[Op.eq]: query[mn].match
+				}
+			});
+		}
+
+		//these are field names
+		const scalars = Object.keys(fields).filter(field => graph[field.typeName].scalar);
+		const nonScalars = Object.keys(fields).filter(field => !graph[field.typeName].scalar);
+
+		const results = await authors.findAll({
+			attributes: scalars, //fields to find (keys)
+			where: where
+		}); //sequelize ORM model
+
+		nonScalars.forEach(nonScalar => {
+			//delegate to a deeper part of the tree
+			results[nonScalar] = handler[fields[nonScalar].typeName](fields[nonScalar], graph);
+		});
+
+		//finally, return the results
+		return results;
+	},
+
+	//simple compound
+	Book: async (query, graph) => {
+		//get the fields alone
+		const { typeName, ...fields } = query;
+
+		//get the names of matched fields
+		const matchedNames = Object.keys(fields.filter(field => field.match));
+
+		//short-circuit if querying everything
+		const where = {};
+		if (matchedNames.length > 0) {
+			//build the "where" object
+			matchedNames.forEach(mn => {
+				where[mn] = {
+					[Op.eq]: query[mn].match
+				}
+			});
+		}
+
+		//return the result
+		return await books.findAll({
+			attributes: Object.keys(fields), //fields to find
+			where: where
+		}); //sequelize ORM model
+	}
+};
+
+//the matching schema
 const schema = `
 scalar Date
 
@@ -16,8 +131,8 @@ type Author {
 }
 `;
 
-const handler = null;
+//the library to test
+const sineQL = require('../source/index.js');
 
 //run the function in debug mode (builds type graph)
 const sine = sineQL(schema, handler, { debug: true });
-