All files index.js

77.5% Statements 93/120
79.01% Branches 64/81
78.57% Functions 22/28
77.78% Lines 91/117
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#! /usr/bin/env node
// @flow
import program from "commander";
import prettier from "prettier";
import yaml from "js-yaml";
import fs from "fs";
import path from "path";
import axios from "axios";
 
// Swagger data types are base on types supported by the JSON-Scheme Draft4.
const typeMapping = {
	array: "Array<*>",
	boolean: "boolean",
	integer: "number",
	number: "number",
	null: "null",
	object: "Object",
	Object: "Object",
	string: "string",
	enum: "string",
};
 
const definitionTypeName = (ref): string => {
	console.log("ref is: ", ref);
	Iif (!ref) {
		exit(1);
		return "";
	}
	const re = /#\/definitions\/(.*)|#\/components\/schemas\/(.*)/;
	const found = ref.match(re);
	Iif (!found) {
		return "";
	}
	return found[1] || found[2];
};
 
const stripBrackets = (name: string) => name.replace(/[[\]']+/g, "");
 
const typeFor = (property: any): string => {
	if (property.type === "array") {
		if ("oneOf" in property.items) {
			return `Array<${property.items.oneOf
				.map(
					e =>
						e.type === "object"
							? propertiesTemplate(propertiesList(e.items)).replace(/"/g, "")
							: typeFor(e)
				)
				.join(" | ")}>`;
		} else if ("$ref" in property.items) {
			return `Array<${definitionTypeName(property.items.$ref)}>`;
		} else if (property.items.type === "object") {
			const child = propertiesTemplate(propertiesList(property.items)).replace(
				/"/g,
				""
			);
			return `Array<${child}>`;
		}
		return `Array<${typeMapping[property.items.type]}>`;
	} else if (property.type === "string" && "enum" in property) {
		return property.enum.map(e => `'${e}'`).join(" | ");
	}
	Iif ("allOf" in property) {
		return property.allOf.map(p => typeFor(p)).join("&");
	}
	return typeMapping[property.type] || definitionTypeName(property.$ref);
};
 
const isRequired = (propertyName: string, definition: Object): boolean => {
	const result =
		definition.required && definition.required.indexOf(propertyName) >= 0;
	return result;
};
 
const propertyKeyForDefinition = (
	propName: string,
	definition: Object
): string => {
	const resolvedPropName =
		propName.indexOf("-") > 0 ? `'${propName}'` : propName;
	if (program.checkRequired) {
		return `${resolvedPropName}${isRequired(propName, definition) ? "" : "?"}`;
	}
	return resolvedPropName;
};
 
const propertiesList = (definition: Object) => {
	if ("allOf" in definition) {
		return definition.allOf.map(propertiesList);
	}
 
	if (definition.$ref) {
		return { $ref: definitionTypeName(definition.$ref) };
	}
 
	if ("type" in definition && definition.type !== "object") {
		return typeFor(definition);
	}
 
	Iif (
		!definition.properties ||
		Object.keys(definition.properties).length === 0
	) {
		return {};
	}
	return Object.assign.apply(
		null,
		Object.keys(definition.properties).reduce(
			(properties: Array<Object>, propName: string) => {
				const arr = properties.concat({
					[propertyKeyForDefinition(propName, definition)]: typeFor(
						definition.properties[propName]
					),
				});
				return arr;
			},
			[{}]
		)
	);
};
 
const withExact = (property: string): string => {
	const result = property.replace(/{[^|]/g, "{|").replace(/[^|]}/g, "|}");
	return result;
};
 
const propertiesTemplate = (
	properties: Object | Array<Object> | string
): string => {
	if (typeof properties === "string") {
		return properties;
	}
	if (Array.isArray(properties)) {
		return properties
			.map(property => {
				let p = property.$ref ? `& ${property.$ref}` : JSON.stringify(property);
				if (!property.$ref && program.exact) {
					p = withExact(p);
				}
				return p;
			})
			.sort(a => (a[0] === "&" ? 1 : -1))
			.join(" ");
	}
	if (program.exact) {
		return withExact(JSON.stringify(properties));
	}
	return JSON.stringify(properties);
};
 
const generate = (swagger: Object): string => {
	let defs;
	if (swagger.definitions) {
		defs = swagger.definitions;
	} else Eif (swagger.components) {
		defs = swagger.components.schemas;
	}
	Iif (!defs) {
		throw new Error("There is no definition");
	}
 
	const g = Object.keys(defs)
		.reduce((acc: Array<Object>, definitionName: string) => {
			const arr = acc.concat({
				title: stripBrackets(definitionName),
				properties: propertiesList(defs[definitionName]),
			});
			return arr;
		}, [])
		.map(definition => {
			const s = `export type ${definition.title} = ${propertiesTemplate(
				definition.properties
			).replace(/"/g, "")};`;
			return s;
		})
		.join(" ");
	return g;
};
 
export const generator = (content: Object, file: string) => {
	const options = prettier.resolveConfig.sync(file) || {};
	const result = `// @flow\n${generate(content)}`;
	return prettier.format(result, options);
};
 
export const writeToFile = (dist: string = "./flowtype.js", result: string) => {
	fs.writeFile(dist, result, err => {
		if (err) {
			throw err;
		}
	});
};
 
export const isUrl = (value: string): boolean =>
	value.match(/https?:\/\//) !== null;
 
export const distFile = (p: Object, inputFileName: string): string => {
	if (p.destination) {
		return p.destination;
	}
	if (isUrl(inputFileName)) {
		return "./flowtype.js";
	}
 
	const ext = path.parse(inputFileName).ext;
	return inputFileName.replace(ext, ".js");
};
 
export const getContentFromFile = (file: string): Object => {
	const ext = path.extname(file);
	const readFile = fs.readFileSync(file, "utf8");
	return ext === ".yaml" ? yaml.safeLoad(readFile) : JSON.parse(readFile);
};
 
export const isObject = (value: any): boolean =>
	typeof value === "object" && value !== null;
 
export const getContentFromUrl = (url: string): Promise<Object> =>
	axios({
		method: "get",
		url,
	}).then(response => {
		const { data } = response;
		return isObject(data) ? data : yaml.safeLoad(data);
	});
 
export const getContent = (fileOrUrl: string): Promise<Object> => {
	if (isUrl(fileOrUrl)) {
		return getContentFromUrl(fileOrUrl);
	}
	const content = getContentFromFile(fileOrUrl);
	return Promise.resolve(content);
};
 
program
	.arguments("<file>")
	.option("-d --destination <destination>", "Destination path")
	.option("-cr --check-required", "Add question mark to optional properties")
	.option("-e --exact", "Add exact types")
	.action(async file => {
		try {
			const content = await getContent(file);
			const result = generator(content, file);
			const dist = distFile(program, file);
			writeToFile(dist, result);
			console.log(`Generated flow types to ${dist}`);
		} catch (e) {
			console.log(e);
		}
	})
	.parse(process.argv);