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115 lines
3.8 KiB
JavaScript
115 lines
3.8 KiB
JavaScript
/*
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*
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* Copyright 2016, Google Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following disclaimer
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* in the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Google Inc. nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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'use strict';
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Object.defineProperty(exports, "__esModule", { value: true });
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var util = require("util");
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var _ = require("lodash");
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/* constants used in the pegjs parser */
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exports.BINDING = 1;
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exports.END_BINDING = 2;
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exports.TERMINAL = 3;
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/**
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* Checks that segments only has one terminal segment that is a path wildcard.
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*
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* @private
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*
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* @param {Segments[]} segments the parsed segments
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* @throws {TypeError} if there are too many
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*/
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function allowOnePathWildcard(segments) {
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var hasPathWildcard = false;
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for (var i = 0; i < segments.length; i++) {
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var s = segments[i];
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if (s.kind !== exports.TERMINAL || s.literal !== '**') {
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continue;
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}
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if (hasPathWildcard) {
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var tooManyWildcards = 'cannot contain more than one path wildcard';
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throw new TypeError(tooManyWildcards);
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}
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hasPathWildcard = true;
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}
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}
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/**
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* Counts the number of terminal segments.
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*
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* @private
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*
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* @param {Segments[]} segments the parsed segments
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* @return {number} the number of terminal segments in the template
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*/
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function countTerminals(segments) {
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var terms = _.filter(segments, function (x) {
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return x.kind === exports.TERMINAL;
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});
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return terms.length;
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}
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/**
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* Updates missing literals of each of the binding segments.
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*
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* @private
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*
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* @param {Segments[]} segments the parsed segments
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*/
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function updateBindingLiterals(segments) {
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var bindingIndex = 0;
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segments.forEach(function (s) {
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if (s.kind === exports.BINDING && !s.literal) {
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s.literal = util.format('$%d', bindingIndex);
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bindingIndex += 1;
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}
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});
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}
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/**
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* Completes the parsing of the segments
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*
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* Validates them, and transforms them into the object used by the
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* PathTemplate class.
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*
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* @private
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*
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* @param {Segments[]} segments the parsed segments
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* @param {Object} initializes the attributes of a PathTemplate
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* @return {Object} Returns segments and size
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* @throws {TypeError} if multiple path wildcards exist
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*/
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function finishParse(segments) {
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allowOnePathWildcard(segments);
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updateBindingLiterals(segments);
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return {
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segments: segments,
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size: countTerminals(segments),
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};
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}
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exports.finishParse = finishParse;
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//# sourceMappingURL=parser_extras.js.map
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