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44 lines
1.3 KiB
JavaScript
44 lines
1.3 KiB
JavaScript
6 years ago
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"use strict";
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const url = require("url");
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module.exports = function modifyUrl(baseUrl, newProps_, options = {}) {
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if (baseUrl == null) {
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throw new Error("Must specify a base URL");
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} else if (newProps_ == null) {
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throw new Error("Must specify new properties");
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} else if (typeof baseUrl !== "string") {
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throw new Error("Base URL must be a string");
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} else if (typeof newProps_ !== "object" || Array.isArray(newProps_)) {
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throw new Error("New properties must be an object");
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} else if (options.mergeQuery === true && newProps_.search != null) {
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throw new Error("You can only use `query`, not `search`, when the `mergeQuery` option is enabled");
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} else {
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let parsedBaseUrl = url.parse(baseUrl, true);
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let newProps = Object.assign({}, newProps_);
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if (newProps.query != null) {
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parsedBaseUrl.search = null;
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}
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if (newProps.hostname != null || newProps.port != null) {
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parsedBaseUrl.host = null;
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}
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let newQuery;
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if (newProps.query != null) {
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if (options.mergeQuery === true) {
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newQuery = Object.assign(parsedBaseUrl.query, newProps.query)
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} else {
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newQuery = newProps.query;
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}
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} else {
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newQuery = parsedBaseUrl.query;
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}
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return url.format(Object.assign({}, parsedBaseUrl, newProps, {
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query: newQuery
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}));
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}
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};
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