189 lines
5.3 KiB
JavaScript
189 lines
5.3 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.checkComponentAttribute = checkComponentAttribute;
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exports.parseComponentSelector = parseComponentSelector;
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/**
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* Copyright (c) Microsoft Corporation.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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function checkComponentAttribute(obj, attr) {
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for (const token of attr.jsonPath) {
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if (obj !== undefined && obj !== null) obj = obj[token];
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}
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const objValue = typeof obj === 'string' && !attr.caseSensetive ? obj.toUpperCase() : obj;
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const attrValue = typeof attr.value === 'string' && !attr.caseSensetive ? attr.value.toUpperCase() : attr.value;
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if (attr.op === '<truthy>') return !!objValue;
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if (attr.op === '=') return objValue === attrValue;
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if (typeof objValue !== 'string' || typeof attrValue !== 'string') return false;
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if (attr.op === '*=') return objValue.includes(attrValue);
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if (attr.op === '^=') return objValue.startsWith(attrValue);
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if (attr.op === '$=') return objValue.endsWith(attrValue);
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if (attr.op === '|=') return objValue === attrValue || objValue.startsWith(attrValue + '-');
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if (attr.op === '~=') return objValue.split(' ').includes(attrValue);
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return false;
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}
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function parseComponentSelector(selector) {
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let wp = 0;
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let EOL = selector.length === 0;
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const next = () => selector[wp] || '';
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const eat1 = () => {
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const result = next();
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++wp;
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EOL = wp >= selector.length;
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return result;
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};
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const syntaxError = stage => {
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if (EOL) throw new Error(`Unexpected end of selector while parsing selector \`${selector}\``);
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throw new Error(`Error while parsing selector \`${selector}\` - unexpected symbol "${next()}" at position ${wp}` + (stage ? ' during ' + stage : ''));
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};
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function skipSpaces() {
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while (!EOL && /\s/.test(next())) eat1();
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}
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function readIdentifier() {
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let result = '';
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skipSpaces();
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while (!EOL && /[-$0-9A-Z_]/i.test(next())) result += eat1();
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return result;
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}
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function readQuotedString(quote) {
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let result = eat1();
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if (result !== quote) syntaxError('parsing quoted string');
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while (!EOL && next() !== quote) {
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if (next() === '\\') eat1();
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result += eat1();
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}
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if (next() !== quote) syntaxError('parsing quoted string');
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result += eat1();
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return result;
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}
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function readAttributeToken() {
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let token = '';
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skipSpaces();
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if (next() === `'` || next() === `"`) token = readQuotedString(next()).slice(1, -1);else token = readIdentifier();
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if (!token) syntaxError('parsing property path');
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return token;
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}
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function readOperator() {
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skipSpaces();
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let op = '';
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if (!EOL) op += eat1();
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if (!EOL && op !== '=') op += eat1();
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if (!['=', '*=', '^=', '$=', '|=', '~='].includes(op)) syntaxError('parsing operator');
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return op;
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}
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function readAttribute() {
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// skip leading [
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eat1(); // read attribute name:
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// foo.bar
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// 'foo' . "ba zz"
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const jsonPath = [];
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jsonPath.push(readAttributeToken());
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skipSpaces();
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while (next() === '.') {
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eat1();
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jsonPath.push(readAttributeToken());
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skipSpaces();
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} // check property is truthy: [enabled]
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if (next() === ']') {
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eat1();
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return {
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jsonPath,
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op: '<truthy>',
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value: null,
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caseSensetive: false
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};
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}
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const operator = readOperator();
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let value = undefined;
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let caseSensetive = true;
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skipSpaces();
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if (next() === `'` || next() === `"`) {
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value = readQuotedString(next()).slice(1, -1);
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skipSpaces();
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if (next() === 'i' || next() === 'I') {
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caseSensetive = false;
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eat1();
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} else if (next() === 's' || next() === 'S') {
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caseSensetive = true;
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eat1();
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}
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} else {
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value = '';
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while (!EOL && !/\s/.test(next()) && next() !== ']') value += eat1();
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if (value === 'true') {
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value = true;
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} else if (value === 'false') {
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value = false;
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} else {
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value = +value;
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if (isNaN(value)) syntaxError('parsing attribute value');
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}
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}
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skipSpaces();
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if (next() !== ']') syntaxError('parsing attribute value');
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eat1();
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if (operator !== '=' && typeof value !== 'string') throw new Error(`Error while parsing selector \`${selector}\` - cannot use ${operator} in attribute with non-string matching value - ${value}`);
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return {
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jsonPath,
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op: operator,
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value,
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caseSensetive
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};
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}
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const result = {
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name: '',
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attributes: []
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};
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result.name = readIdentifier();
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skipSpaces();
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while (next() === '[') {
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result.attributes.push(readAttribute());
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skipSpaces();
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}
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if (!EOL) syntaxError(undefined);
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if (!result.name && !result.attributes.length) throw new Error(`Error while parsing selector \`${selector}\` - selector cannot be empty`);
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return result;
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} |