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35 lines
1009 B
JavaScript
35 lines
1009 B
JavaScript
"use strict";
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const url = require("url");
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const ValidationError = require("@validatem/error");
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module.exports = function (protocols) {
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if (protocols != null && !Array.isArray(protocols)) {
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throw new Error(`Permitted protocol list must be an array`);
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}
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let protocolSet = (protocols != null)
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? new Set(protocols.map((protocol) => protocol.toLowerCase()))
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: null;
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return function isURL(value) {
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let parsed = url.parse(value);
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let parsedProtocol = (parsed.protocol != null)
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? parsed.protocol.replace(/:$/, "")
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: null;
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if (parsedProtocol == null) {
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return new ValidationError("Must be a valid URL");
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} else if (protocolSet != null && !protocolSet.has(parsedProtocol.toLowerCase())) {
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let validProtocolList = protocols
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.map((protocol) => protocol.toUpperCase())
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.join(", ");
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return new ValidationError(`Must be a URL with one of the following protocols: ${validProtocolList} - but got ${parsedProtocol.toUpperCase()} instead`);
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} else {
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return parsed;
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}
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}
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};
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