FM / lib

/opt/canhelp/node_modules/braces/lib

Name	Size	Mode	Actions
compile.js	1501	0644	edit dl rm
constants.js	1589	0644	edit dl rm
expand.js	2797	0644	edit dl rm
parse.js	6899	0644	edit dl rm
stringify.js	708	0644	edit dl rm
utils.js	2518	0644	edit dl rm

Edit: /opt/canhelp/node_modules/braces/lib/parse.js (6899B)

'use strict';

const stringify = require('./stringify');

/**
 * Constants
 */

const {
  MAX_LENGTH,
  CHAR_BACKSLASH, /* \ */
  CHAR_BACKTICK, /* ` */
  CHAR_COMMA, /* , */
  CHAR_DOT, /* . */
  CHAR_LEFT_PARENTHESES, /* ( */
  CHAR_RIGHT_PARENTHESES, /* ) */
  CHAR_LEFT_CURLY_BRACE, /* { */
  CHAR_RIGHT_CURLY_BRACE, /* } */
  CHAR_LEFT_SQUARE_BRACKET, /* [ */
  CHAR_RIGHT_SQUARE_BRACKET, /* ] */
  CHAR_DOUBLE_QUOTE, /* " */
  CHAR_SINGLE_QUOTE, /* ' */
  CHAR_NO_BREAK_SPACE,
  CHAR_ZERO_WIDTH_NOBREAK_SPACE
} = require('./constants');

/**
 * parse
 */

const parse = (input, options = {}) => {
  if (typeof input !== 'string') {
    throw new TypeError('Expected a string');
  }

const ast = { type: 'root', input, nodes: [] };
  const stack = [ast];
  let block = ast;
  let prev = ast;
  let brackets = 0;
  const length = input.length;
  let index = 0;
  let depth = 0;
  let value;

/**
   * Helpers
   */

const advance = () => input[index++];
  const push = node => {
    if (node.type === 'text' && prev.type === 'dot') {
      prev.type = 'text';
    }

if (prev && prev.type === 'text' && node.type === 'text') {
      prev.value += node.value;
      return;
    }

block.nodes.push(node);
    node.parent = block;
    node.prev = prev;
    prev = node;
    return node;
  };

push({ type: 'bos' });

while (index < length) {
    block = stack[stack.length - 1];
    value = advance();

/**
     * Invalid chars
     */

if (value === CHAR_ZERO_WIDTH_NOBREAK_SPACE || value === CHAR_NO_BREAK_SPACE) {
      continue;
    }

/**
     * Escaped chars
     */

if (value === CHAR_BACKSLASH) {
      push({ type: 'text', value: (options.keepEscaping ? value : '') + advance() });
      continue;
    }

/**
     * Right square bracket (literal): ']'
     */

if (value === CHAR_RIGHT_SQUARE_BRACKET) {
      push({ type: 'text', value: '\\' + value });
      continue;
    }

/**
     * Left square bracket: '['
     */

if (value === CHAR_LEFT_SQUARE_BRACKET) {
      brackets++;

let next;

while (index < length && (next = advance())) {
        value += next;

if (next === CHAR_LEFT_SQUARE_BRACKET) {
          brackets++;
          continue;
        }

if (next === CHAR_BACKSLASH) {
          value += advance();
          continue;
        }

if (next === CHAR_RIGHT_SQUARE_BRACKET) {
          brackets--;

if (brackets === 0) {
            break;
          }
        }
      }

push({ type: 'text', value });
      continue;
    }

/**
     * Parentheses
     */

if (value === CHAR_LEFT_PARENTHESES) {
      block = push({ type: 'paren', nodes: [] });
      stack.push(block);
      push({ type: 'text', value });
      continue;
    }

if (value === CHAR_RIGHT_PARENTHESES) {
      if (block.type !== 'paren') {
        push({ type: 'text', value });
        continue;
      }
      block = stack.pop();
      push({ type: 'text', value });
      block = stack[stack.length - 1];
      continue;
    }

/**
     * Quotes: '|"|`
     */

if (value === CHAR_DOUBLE_QUOTE || value === CHAR_SINGLE_QUOTE || value === CHAR_BACKTICK) {
      const open = value;
      let next;

if (options.keepQuotes !== true) {
        value = '';
      }

while (index < length && (next = advance())) {
        if (next === CHAR_BACKSLASH) {
          value += next + advance();
          continue;
        }

if (next === open) {
          if (options.keepQuotes === true) value += next;
          break;
        }

value += next;
      }

push({ type: 'text', value });
      continue;
    }

/**
     * Left curly brace: '{'
     */

if (value === CHAR_LEFT_CURLY_BRACE) {
      depth++;

const dollar = prev.value && prev.value.slice(-1) === '$' || block.dollar === true;
      const brace = {
        type: 'brace',
        open: true,
        close: false,
        dollar,
        depth,
        commas: 0,
        ranges: 0,
        nodes: []
      };

block = push(brace);
      stack.push(block);
      push({ type: 'open', value });
      continue;
    }

/**
     * Right curly brace: '}'
     */

if (value === CHAR_RIGHT_CURLY_BRACE) {
      if (block.type !== 'brace') {
        push({ type: 'text', value });
        continue;
      }

const type = 'close';
      block = stack.pop();
      block.close = true;

push({ type, value });
      depth--;

block = stack[stack.length - 1];
      continue;
    }

/**
     * Comma: ','
     */

if (value === CHAR_COMMA && depth > 0) {
      if (block.ranges > 0) {
        block.ranges = 0;
        const open = block.nodes.shift();
        block.nodes = [open, { type: 'text', value: stringify(block) }];
      }

push({ type: 'comma', value });
      block.commas++;
      continue;
    }

/**
     * Dot: '.'
     */

if (value === CHAR_DOT && depth > 0 && block.commas === 0) {
      const siblings = block.nodes;

if (depth === 0 || siblings.length === 0) {
        push({ type: 'text', value });
        continue;
      }

if (prev.type === 'dot') {
        block.range = [];
        prev.value += value;
        prev.type = 'range';

if (block.nodes.length !== 3 && block.nodes.length !== 5) {
          block.invalid = true;
          block.ranges = 0;
          prev.type = 'text';
          continue;
        }

block.ranges++;
        block.args = [];
        continue;
      }

if (prev.type === 'range') {
        siblings.pop();

const before = siblings[siblings.length - 1];
        before.value += prev.value + value;
        prev = before;
        block.ranges--;
        continue;
      }

push({ type: 'dot', value });
      continue;
    }

/**
     * Text
     */

push({ type: 'text', value });
  }

// Mark imbalanced braces and brackets as invalid
  do {
    block = stack.pop();

if (block.type !== 'root') {
      block.nodes.forEach(node => {
        if (!node.nodes) {
          if (node.type === 'open') node.isOpen = true;
          if (node.type === 'close') node.isClose = true;
          if (!node.nodes) node.type = 'text';
          node.invalid = true;
        }
      });

// get the location of the block on parent.nodes (block's siblings)
      const parent = stack[stack.length - 1];
      const index = parent.nodes.indexOf(block);
      // replace the (invalid) block with it's nodes
      parent.nodes.splice(index, 1, ...block.nodes);
    }
  } while (stack.length > 0);

push({ type: 'eos' });
  return ast;
};

module.exports = parse;

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