57 lines
1.9 KiB
JavaScript
57 lines
1.9 KiB
JavaScript
import { argsert } from './argsert.js';
|
|
import { isPromise } from './utils/is-promise.js';
|
|
export function globalMiddlewareFactory(globalMiddleware, context) {
|
|
return function (callback, applyBeforeValidation = false) {
|
|
argsert(
|
|
'<array|function> [boolean]',
|
|
[callback, applyBeforeValidation],
|
|
arguments.length
|
|
);
|
|
if (Array.isArray(callback)) {
|
|
for (let i = 0; i < callback.length; i++) {
|
|
if (typeof callback[i] !== 'function') {
|
|
throw Error('middleware must be a function');
|
|
}
|
|
callback[i].applyBeforeValidation = applyBeforeValidation;
|
|
}
|
|
Array.prototype.push.apply(globalMiddleware, callback);
|
|
} else if (typeof callback === 'function') {
|
|
callback.applyBeforeValidation = applyBeforeValidation;
|
|
globalMiddleware.push(callback);
|
|
}
|
|
return context;
|
|
};
|
|
}
|
|
export function commandMiddlewareFactory(commandMiddleware) {
|
|
if (!commandMiddleware) return [];
|
|
return commandMiddleware.map((middleware) => {
|
|
middleware.applyBeforeValidation = false;
|
|
return middleware;
|
|
});
|
|
}
|
|
export function applyMiddleware(argv, yargs, middlewares, beforeValidation) {
|
|
const beforeValidationError = new Error(
|
|
'middleware cannot return a promise when applyBeforeValidation is true'
|
|
);
|
|
return middlewares.reduce((acc, middleware) => {
|
|
if (middleware.applyBeforeValidation !== beforeValidation) {
|
|
return acc;
|
|
}
|
|
if (isPromise(acc)) {
|
|
return acc
|
|
.then((initialObj) =>
|
|
Promise.all([initialObj, middleware(initialObj, yargs)])
|
|
)
|
|
.then(([initialObj, middlewareObj]) =>
|
|
Object.assign(initialObj, middlewareObj)
|
|
);
|
|
} else {
|
|
const result = middleware(acc, yargs);
|
|
if (beforeValidation && isPromise(result)) throw beforeValidationError;
|
|
return isPromise(result) ?
|
|
result.then((middlewareObj) => Object.assign(acc, middlewareObj))
|
|
: Object.assign(acc, result);
|
|
}
|
|
}, argv);
|
|
}
|