express-validator
Version:
Express middleware for the validator module.
67 lines (66 loc) • 2.9 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.ContextRunnerImpl = void 0;
const _ = require("lodash");
const base_1 = require("../base");
const context_1 = require("../context");
const select_fields_1 = require("../select-fields");
const validation_result_1 = require("../validation-result");
class ResultWithContext extends validation_result_1.Result {
constructor(context) {
super(error => error, context.errors);
this.context = context;
}
}
class ContextRunnerImpl {
constructor(builderOrContext, selectFields = select_fields_1.selectFields) {
this.builderOrContext = builderOrContext;
this.selectFields = selectFields;
}
async run(req, options = {}) {
const context = this.builderOrContext instanceof context_1.Context
? this.builderOrContext
: this.builderOrContext.build();
const instances = this.selectFields(req, context.fields, context.locations);
context.addFieldInstances(instances);
const haltedInstances = new Set();
for (const contextItem of context.stack) {
const promises = context.getData({ requiredOnly: true }).map(async (instance) => {
const { location, path } = instance;
const instanceKey = `${location}:${path}`;
if (haltedInstances.has(instanceKey)) {
return;
}
try {
await contextItem.run(context, instance.value, {
req,
location,
path,
});
// An instance is mutable, so if an item changed its value, there's no need to call getData again
const newValue = instance.value;
// Checks whether the value changed.
// Avoids e.g. undefined values being set on the request if it didn't have the key initially.
const reqValue = path !== '' ? _.get(req[location], path) : req[location];
if (!options.dryRun && reqValue !== instance.value) {
path !== '' ? _.set(req[location], path, newValue) : _.set(req, location, newValue);
}
}
catch (e) {
if (e instanceof base_1.ValidationHalt) {
haltedInstances.add(instanceKey);
return;
}
throw e;
}
});
await Promise.all(promises);
}
if (!options.dryRun) {
const internalReq = req;
internalReq[base_1.contextsKey] = (internalReq[base_1.contextsKey] || []).concat(context);
}
return new ResultWithContext(context);
}
}
exports.ContextRunnerImpl = ContextRunnerImpl;