/var/www/greso.tech/server/nsm/node_modules/google-gax/build/src
Edit: /var/www/greso.tech/server/nsm/node_modules/google-gax/build/src/pathTemplate.js (9933B)
"use strict";
/**
* Copyright 2020 Google LLC
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.PathTemplate = void 0;
class PathTemplate {
/**
* @param {String} data the of the template
*
* @constructor
*/
constructor(data) {
this.bindings = {};
this.data = data;
this.segments = this.parsePathTemplate(data);
this.size = this.segments.length;
}
/**
* Matches a fully-qualified path template string.
*
* @param {String} path a fully-qualified path template string
* @return {Object} contains const names matched to binding values
* @throws {TypeError} if path can't be matched to this template
*/
match(path) {
let pathSegments = path.split('/');
const bindings = {};
if (pathSegments.length !== this.segments.length) {
// if the path contains a wildcard, then the length may differ by 1.
if (!this.data.includes('**')) {
throw new TypeError(`This path ${path} does not match path template ${this.data}, the number of parameters is not same.`);
}
else if (pathSegments.length !== this.segments.length + 1) {
throw new TypeError(`This path ${path} does not match path template ${this.data}, the number of parameters is not same with one wildcard.`);
}
}
for (let index = 0; index < this.segments.length && pathSegments.length > 0; index++) {
if (this.segments[index] !== pathSegments[0]) {
if (!this.segments[index].includes('*')) {
throw new TypeError(`segment does not match, ${this.segments[index]} and ${pathSegments[index]}.`);
}
else {
let segment = this.segments[index];
const matches = segment.match(/\{[$0-9a-zA-Z_]+=.*?\}/g);
if (!matches) {
throw new Error(`Error processing path template segment ${segment}`);
}
const variables = matches.map(str => str.replace(/^\{/, '').replace(/=.*/, ''));
if (segment.includes('**')) {
bindings[variables[0]] = pathSegments[0] + '/' + pathSegments[1];
pathSegments = pathSegments.slice(2);
}
else {
// atomic resource
if (variables.length === 1) {
bindings[variables[0]] = pathSegments[0];
}
else {
// non-slash resource
// segment: {blurb_id=*}.{legacy_user=*} to match pathSegments: ['bar.user2']
// split the match pathSegments[0] -> value: ['bar', 'user2']
// compare the length of two arrays, and compare array items
const value = pathSegments[0].split(/[-_.~]/);
if (value.length !== variables.length) {
throw new Error(`segment ${segment} does not match ${pathSegments[0]}`);
}
for (const v of variables) {
bindings[v] = value[0];
segment = segment.replace(`{${v}=*}`, `${value[0]}`);
value.shift();
}
// segment: {blurb_id=*}.{legacy_user=*} matching pathSegments: ['bar~user2'] should fail
if (segment !== pathSegments[0]) {
throw new TypeError(`non slash resource pattern ${this.segments[index]} and ${pathSegments[0]} should have same separator`);
}
}
pathSegments.shift();
}
}
}
else {
pathSegments.shift();
}
}
return bindings;
}
/**
* Renders a path template using the provided bindings.
*
* @param {Object} bindings a mapping of const names to binding strings
* @return {String} a rendered representation of the path template
* @throws {TypeError} if a key is missing, or if a sub-template cannot be
* parsed
*/
render(bindings) {
if (Object.keys(bindings).length !== Object.keys(this.bindings).length) {
throw new TypeError(`The number of variables ${Object.keys(bindings).length} does not match the number of needed variables ${Object.keys(this.bindings).length}`);
}
let path = this.inspect();
for (const key of Object.keys(bindings)) {
const b = bindings[key].toString();
if (!this.bindings[key]) {
throw new TypeError(`render fails for not matching ${bindings[key]}`);
}
const variable = this.bindings[key];
if (variable === '*') {
if (!b.match(/[^/{}]+/)) {
throw new TypeError(`render fails for not matching ${b}`);
}
path = path.replace(`{${key}=*}`, `${b}`);
}
else if (variable === '**') {
if (!b.match(/[^{}]+/)) {
throw new TypeError(`render fails for not matching ${b}`);
}
path = path.replace(`{${key}=**}`, `${b}`);
}
}
return path;
}
/**
* Renders the path template.
*
* @return {string} contains const names matched to binding values
*/
inspect() {
return this.segments.join('/');
}
/**
* Parse the path template.
*
* @return {string[]} return segments of the input path.
* For example: 'buckets/{hello}'' will give back ['buckets', {hello=*}]
*/
parsePathTemplate(data) {
const pathSegments = splitPathTemplate(data);
let index = 0;
let wildCardCount = 0;
const segments = [];
let matches;
pathSegments.forEach(segment => {
// * or ** -> segments.push('{$0=*}');
// -> bindings['$0'] = '*'
if (segment === '*' || segment === '**') {
this.bindings[`$${index}`] = segment;
segments.push(`{$${index}=${segment}}`);
index = index + 1;
if (segment === '**') {
++wildCardCount;
}
}
else if ((matches = segment.match(/\{[0-9a-zA-Z-.~_]+(?:=.*?)?\}/g))) {
for (const subsegment of matches) {
const pairMatch = subsegment.match(/^\{([0-9a-zA-Z-.~_]+)(?:=(.*?))?\}$/);
if (!pairMatch) {
throw new Error(`Cannot process path template segment ${subsegment}`);
}
const key = pairMatch[1];
let value = pairMatch[2];
if (!value) {
value = '*';
segment = segment.replace(key, key + '=*');
this.bindings[key] = value;
}
else if (value === '*') {
this.bindings[key] = value;
}
else if (value === '**') {
++wildCardCount;
this.bindings[key] = value;
}
}
segments.push(segment);
}
else if (segment.match(/[0-9a-zA-Z-.~_]+/)) {
segments.push(segment);
}
});
if (wildCardCount > 1) {
throw new TypeError('Can not have more than one wildcard.');
}
return segments;
}
}
exports.PathTemplate = PathTemplate;
/**
* Split the path template by `/`.
* It can not be simply splitted by `/` because there might be `/` in the segments.
* For example: 'a/b/{a=hello/world}' we do not want to break the brackets pair
* so above path will be splitted as ['a', 'b', '{a=hello/world}']
*/
function splitPathTemplate(data) {
let left = 0;
let right = 0;
let bracketCount = 0;
const segments = [];
while (right >= left && right < data.length) {
if (data.charAt(right) === '{') {
bracketCount = bracketCount + 1;
}
else if (data.charAt(right) === '}') {
bracketCount = bracketCount - 1;
}
else if (data.charAt(right) === '/') {
if (right === data.length - 1) {
throw new TypeError('Invalid path, it can not be ended by /');
}
if (bracketCount === 0) {
// complete bracket, to avoid the case a/b/**/*/{a=hello/world}
segments.push(data.substring(left, right));
left = right + 1;
}
}
if (right === data.length - 1) {
if (bracketCount !== 0) {
throw new TypeError('Brackets are invalid.');
}
segments.push(data.substring(left));
}
right = right + 1;
}
return segments;
}
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