"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.createPathRewriter = void 0;
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const isPlainObj = require("is-plain-obj");
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const errors_1 = require("./errors");
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const logger_1 = require("./logger");
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const logger = logger_1.getInstance();
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/**
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* Create rewrite function, to cache parsed rewrite rules.
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*
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* @param {Object} rewriteConfig
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* @return {Function} Function to rewrite paths; This function should accept `path` (request.url) as parameter
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*/
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function createPathRewriter(rewriteConfig) {
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let rulesCache;
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if (!isValidRewriteConfig(rewriteConfig)) {
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return;
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}
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if (typeof rewriteConfig === 'function') {
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const customRewriteFn = rewriteConfig;
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return customRewriteFn;
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}
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else {
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rulesCache = parsePathRewriteRules(rewriteConfig);
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return rewritePath;
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}
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function rewritePath(path) {
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let result = path;
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for (const rule of rulesCache) {
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if (rule.regex.test(path)) {
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result = result.replace(rule.regex, rule.value);
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logger.debug('[HPM] Rewriting path from "%s" to "%s"', path, result);
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break;
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}
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}
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return result;
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}
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}
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exports.createPathRewriter = createPathRewriter;
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function isValidRewriteConfig(rewriteConfig) {
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if (typeof rewriteConfig === 'function') {
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return true;
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}
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else if (isPlainObj(rewriteConfig)) {
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return Object.keys(rewriteConfig).length !== 0;
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}
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else if (rewriteConfig === undefined || rewriteConfig === null) {
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return false;
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}
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else {
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throw new Error(errors_1.ERRORS.ERR_PATH_REWRITER_CONFIG);
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}
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}
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function parsePathRewriteRules(rewriteConfig) {
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const rules = [];
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if (isPlainObj(rewriteConfig)) {
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for (const [key] of Object.entries(rewriteConfig)) {
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rules.push({
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regex: new RegExp(key),
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value: rewriteConfig[key],
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});
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logger.info('[HPM] Proxy rewrite rule created: "%s" ~> "%s"', key, rewriteConfig[key]);
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}
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}
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return rules;
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}
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