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71 lines
2.3 KiB
71 lines
2.3 KiB
5 years ago
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'use strict';
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const middlewareFunctions = require('../query/applyQueryMiddleware').middlewareFunctions;
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const promiseOrCallback = require('../promiseOrCallback');
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module.exports = function applyStaticHooks(model, hooks, statics) {
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const kareemOptions = {
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useErrorHandlers: true,
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numCallbackParams: 1
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};
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hooks = hooks.filter(hook => {
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// If the custom static overwrites an existing query middleware, don't apply
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// middleware to it by default. This avoids a potential backwards breaking
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// change with plugins like `mongoose-delete` that use statics to overwrite
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// built-in Mongoose functions.
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if (middlewareFunctions.indexOf(hook.name) !== -1) {
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return !!hook.model;
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}
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return hook.model !== false;
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});
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model.$__insertMany = hooks.createWrapper('insertMany',
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model.$__insertMany, model, kareemOptions);
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for (const key of Object.keys(statics)) {
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if (hooks.hasHooks(key)) {
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const original = model[key];
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model[key] = function() {
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const numArgs = arguments.length;
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const lastArg = numArgs > 0 ? arguments[numArgs - 1] : null;
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const cb = typeof lastArg === 'function' ? lastArg : null;
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const args = Array.prototype.slice.
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call(arguments, 0, cb == null ? numArgs : numArgs - 1);
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// Special case: can't use `Kareem#wrap()` because it doesn't currently
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// support wrapped functions that return a promise.
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return promiseOrCallback(cb, callback => {
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hooks.execPre(key, model, args, function(err) {
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if (err != null) {
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return callback(err);
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}
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let postCalled = 0;
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const ret = original.apply(model, args.concat(post));
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if (ret != null && typeof ret.then === 'function') {
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ret.then(res => post(null, res), err => post(err));
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}
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function post(error, res) {
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if (postCalled++ > 0) {
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return;
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}
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if (error != null) {
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return callback(error);
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}
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hooks.execPost(key, model, [res], function(error) {
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if (error != null) {
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return callback(error);
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}
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callback(null, res);
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});
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}
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});
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}, model.events);
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};
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}
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}
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};
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