yamljs/lib/Parser.js

// Generated by CoffeeScript 1.8.0
var Inline, ParseException, Parser, Pattern, Utils;

Inline = require('./Inline');

Pattern = require('./Pattern');

Utils = require('./Utils');

ParseException = require('./Exception/ParseException');

Parser = (function() {
  Parser.prototype.PATTERN_FOLDED_SCALAR_ALL = new Pattern('^(?:(?<type>![^\\|>]*)\\s+)?(?<separator>\\||>)(?<modifiers>\\+|\\-|\\d+|\\+\\d+|\\-\\d+|\\d+\\+|\\d+\\-)?(?<comments> +#.*)?$');

  Parser.prototype.PATTERN_FOLDED_SCALAR_END = new Pattern('(?<separator>\\||>)(?<modifiers>\\+|\\-|\\d+|\\+\\d+|\\-\\d+|\\d+\\+|\\d+\\-)?(?<comments> +#.*)?$');

  Parser.prototype.PATTERN_SEQUENCE_ITEM = new Pattern('^\\-((?<leadspaces>\\s+)(?<value>.+?))?\\s*$');

  Parser.prototype.PATTERN_ANCHOR_VALUE = new Pattern('^&(?<ref>[^ ]+) *(?<value>.*)');

  Parser.prototype.PATTERN_COMPACT_NOTATION = new Pattern('^(?<key>' + Inline.REGEX_QUOTED_STRING + '|[^ \'"\\{\\[].*?) *\\:(\\s+(?<value>.+?))?\\s*$');

  Parser.prototype.PATTERN_MAPPING_ITEM = new Pattern('^(?<key>' + Inline.REGEX_QUOTED_STRING + '|[^ \'"\\[\\{].*?) *\\:(\\s+(?<value>.+?))?\\s*$');

  Parser.prototype.PATTERN_DECIMAL = new Pattern('\\d+');

  Parser.prototype.PATTERN_INDENT_SPACES = new Pattern('^ +');

  Parser.prototype.PATTERN_TRAILING_LINES = new Pattern('(\n*)$');

  Parser.prototype.PATTERN_YAML_HEADER = new Pattern('^\\%YAML[: ][\\d\\.]+.*\n');

  Parser.prototype.PATTERN_LEADING_COMMENTS = new Pattern('^(\\#.*?\n)+');

  Parser.prototype.PATTERN_DOCUMENT_MARKER_START = new Pattern('^\\-\\-\\-.*?\n');

  Parser.prototype.PATTERN_DOCUMENT_MARKER_END = new Pattern('^\\.\\.\\.\\s*$');

  Parser.prototype.PATTERN_FOLDED_SCALAR_BY_INDENTATION = {};

  Parser.prototype.CONTEXT_NONE = 0;

  Parser.prototype.CONTEXT_SEQUENCE = 1;

  Parser.prototype.CONTEXT_MAPPING = 2;

  function Parser(offset) {
    this.offset = offset != null ? offset : 0;
    this.lines = [];
    this.currentLineNb = -1;
    this.currentLine = '';
    this.refs = {};
  }

  Parser.prototype.parse = function(value, exceptionOnInvalidType, objectDecoder) {
    var alias, allowOverwrite, block, c, context, data, e, first, i, indent, isRef, k, key, lastKey, lineCount, matches, mergeNode, parsed, parsedItem, parser, refName, refValue, val, values, _i, _j, _k, _l, _len, _len1, _len2, _len3, _name, _ref, _ref1, _ref2;
    if (exceptionOnInvalidType == null) {
      exceptionOnInvalidType = false;
    }
    if (objectDecoder == null) {
      objectDecoder = null;
    }
    this.currentLineNb = -1;
    this.currentLine = '';
    this.lines = this.cleanup(value).split("\n");
    data = null;
    context = this.CONTEXT_NONE;
    allowOverwrite = false;
    while (this.moveToNextLine()) {
      if (this.isCurrentLineEmpty()) {
        continue;
      }
      if ("\t" === this.currentLine[0]) {
        throw new ParseException('A YAML file cannot contain tabs as indentation.', this.getRealCurrentLineNb() + 1, this.currentLine);
      }
      isRef = mergeNode = false;
      if (values = this.PATTERN_SEQUENCE_ITEM.exec(this.currentLine)) {
        if (this.CONTEXT_MAPPING === context) {
          throw new ParseException('You cannot define a sequence item when in a mapping');
        }
        context = this.CONTEXT_SEQUENCE;
        if (data == null) {
          data = [];
        }
        if ((values.value != null) && (matches = this.PATTERN_ANCHOR_VALUE.exec(values.value))) {
          isRef = matches.ref;
          values.value = matches.value;
        }
        if (!(values.value != null) || '' === Utils.trim(values.value, ' ') || Utils.ltrim(values.value, ' ').indexOf('#') === 0) {
          if (this.currentLineNb < this.lines.length - 1 && !this.isNextLineUnIndentedCollection()) {
            c = this.getRealCurrentLineNb() + 1;
            parser = new Parser(c);
            parser.refs = this.refs;
            data.push(parser.parse(this.getNextEmbedBlock(null, true), exceptionOnInvalidType, objectDecoder));
          } else {
            data.push(null);
          }
        } else {
          if (((_ref = values.leadspaces) != null ? _ref.length : void 0) && (matches = this.PATTERN_COMPACT_NOTATION.exec(values.value))) {
            c = this.getRealCurrentLineNb();
            parser = new Parser(c);
            parser.refs = this.refs;
            block = values.value;
            indent = this.getCurrentLineIndentation();
            if (this.isNextLineIndented(false)) {
              block += "\n" + this.getNextEmbedBlock(indent + values.leadspaces.length + 1, true);
            }
            data.push(parser.parse(block, exceptionOnInvalidType, objectDecoder));
          } else {
            data.push(this.parseValue(values.value, exceptionOnInvalidType, objectDecoder));
          }
        }
      } else if ((values = this.PATTERN_MAPPING_ITEM.exec(this.currentLine)) && values.key.indexOf(' #') === -1) {
        if (this.CONTEXT_SEQUENCE === context) {
          throw new ParseException('You cannot define a mapping item when in a sequence');
        }
        context = this.CONTEXT_MAPPING;
        if (data == null) {
          data = {};
        }
        Inline.configure(exceptionOnInvalidType, objectDecoder);
        try {
          key = Inline.parseScalar(values.key);
        } catch (_error) {
          e = _error;
          e.parsedLine = this.getRealCurrentLineNb() + 1;
          e.snippet = this.currentLine;
          throw e;
        }
        if ('<<' === key) {
          mergeNode = true;
          allowOverwrite = true;
          if (((_ref1 = values.value) != null ? _ref1.indexOf('*') : void 0) === 0) {
            refName = values.value.slice(1);
            if (this.refs[refName] == null) {
              throw new ParseException('Reference "' + refName + '" does not exist.', this.getRealCurrentLineNb() + 1, this.currentLine);
            }
            refValue = this.refs[refName];
            if (typeof refValue !== 'object') {
              throw new ParseException('YAML merge keys used with a scalar value instead of an object.', this.getRealCurrentLineNb() + 1, this.currentLine);
            }
            if (refValue instanceof Array) {
              for (i = _i = 0, _len = refValue.length; _i < _len; i = ++_i) {
                value = refValue[i];
                if (data[_name = String(i)] == null) {
                  data[_name] = value;
                }
              }
            } else {
              for (key in refValue) {
                value = refValue[key];
                if (data[key] == null) {
                  data[key] = value;
                }
              }
            }
          } else {
            if ((values.value != null) && values.value !== '') {
              value = values.value;
            } else {
              value = this.getNextEmbedBlock();
            }
            c = this.getRealCurrentLineNb() + 1;
            parser = new Parser(c);
            parser.refs = this.refs;
            parsed = parser.parse(value, exceptionOnInvalidType);
            if (typeof parsed !== 'object') {
              throw new ParseException('YAML merge keys used with a scalar value instead of an object.', this.getRealCurrentLineNb() + 1, this.currentLine);
            }
            if (parsed instanceof Array) {
              for (_j = 0, _len1 = parsed.length; _j < _len1; _j++) {
                parsedItem = parsed[_j];
                if (typeof parsedItem !== 'object') {
                  throw new ParseException('Merge items must be objects.', this.getRealCurrentLineNb() + 1, parsedItem);
                }
                if (parsedItem instanceof Array) {
                  for (i = _k = 0, _len2 = parsedItem.length; _k < _len2; i = ++_k) {
                    value = parsedItem[i];
                    k = String(i);
                    if (!data.hasOwnProperty(k)) {
                      data[k] = value;
                    }
                  }
                } else {
                  for (key in parsedItem) {
                    value = parsedItem[key];
                    if (!data.hasOwnProperty(key)) {
                      data[key] = value;
                    }
                  }
                }
              }
            } else {
              for (key in parsed) {
                value = parsed[key];
                if (!data.hasOwnProperty(key)) {
                  data[key] = value;
                }
              }
            }
          }
        } else if ((values.value != null) && (matches = this.PATTERN_ANCHOR_VALUE.exec(values.value))) {
          isRef = matches.ref;
          values.value = matches.value;
        }
        if (mergeNode) {

        } else if (!(values.value != null) || '' === Utils.trim(values.value, ' ') || Utils.ltrim(values.value, ' ').indexOf('#') === 0) {
          if (!(this.isNextLineIndented()) && !(this.isNextLineUnIndentedCollection())) {
            if (allowOverwrite || data[key] === void 0) {
              data[key] = null;
            }
          } else {
            c = this.getRealCurrentLineNb() + 1;
            parser = new Parser(c);
            parser.refs = this.refs;
            val = parser.parse(this.getNextEmbedBlock(), exceptionOnInvalidType, objectDecoder);
            if (allowOverwrite || data[key] === void 0) {
              data[key] = val;
            }
          }
        } else {
          val = this.parseValue(values.value, exceptionOnInvalidType, objectDecoder);
          if (allowOverwrite || data[key] === void 0) {
            data[key] = val;
          }
        }
      } else {
        lineCount = this.lines.length;
        if (1 === lineCount || (2 === lineCount && Utils.isEmpty(this.lines[1]))) {
          try {
            value = Inline.parse(this.lines[0], exceptionOnInvalidType, objectDecoder);
          } catch (_error) {
            e = _error;
            e.parsedLine = this.getRealCurrentLineNb() + 1;
            e.snippet = this.currentLine;
            throw e;
          }
          if (typeof value === 'object') {
            if (value instanceof Array) {
              first = value[0];
            } else {
              for (key in value) {
                first = value[key];
                break;
              }
            }
            if (typeof first === 'string' && first.indexOf('*') === 0) {
              data = [];
              for (_l = 0, _len3 = value.length; _l < _len3; _l++) {
                alias = value[_l];
                data.push(this.refs[alias.slice(1)]);
              }
              value = data;
            }
          }
          return value;
        } else if ((_ref2 = Utils.ltrim(value).charAt(0)) === '[' || _ref2 === '{') {
          try {
            return Inline.parse(value, exceptionOnInvalidType, objectDecoder);
          } catch (_error) {
            e = _error;
            e.parsedLine = this.getRealCurrentLineNb() + 1;
            e.snippet = this.currentLine;
            throw e;
          }
        }
        throw new ParseException('Unable to parse.', this.getRealCurrentLineNb() + 1, this.currentLine);
      }
      if (isRef) {
        if (data instanceof Array) {
          this.refs[isRef] = data[data.length - 1];
        } else {
          lastKey = null;
          for (key in data) {
            lastKey = key;
          }
          this.refs[isRef] = data[lastKey];
        }
      }
    }
    if (Utils.isEmpty(data)) {
      return null;
    } else {
      return data;
    }
  };

  Parser.prototype.getRealCurrentLineNb = function() {
    return this.currentLineNb + this.offset;
  };

  Parser.prototype.getCurrentLineIndentation = function() {
    return this.currentLine.length - Utils.ltrim(this.currentLine, ' ').length;
  };

  Parser.prototype.getNextEmbedBlock = function(indentation, includeUnindentedCollection) {
    var data, indent, isItUnindentedCollection, newIndent, removeComments, removeCommentsPattern, unindentedEmbedBlock;
    if (indentation == null) {
      indentation = null;
    }
    if (includeUnindentedCollection == null) {
      includeUnindentedCollection = false;
    }
    this.moveToNextLine();
    if (indentation == null) {
      newIndent = this.getCurrentLineIndentation();
      unindentedEmbedBlock = this.isStringUnIndentedCollectionItem(this.currentLine);
      if (!(this.isCurrentLineEmpty()) && 0 === newIndent && !unindentedEmbedBlock) {
        throw new ParseException('Indentation problem.', this.getRealCurrentLineNb() + 1, this.currentLine);
      }
    } else {
      newIndent = indentation;
    }
    data = [this.currentLine.slice(newIndent)];
    if (!includeUnindentedCollection) {
      isItUnindentedCollection = this.isStringUnIndentedCollectionItem(this.currentLine);
    }
    removeCommentsPattern = this.PATTERN_FOLDED_SCALAR_END;
    removeComments = !removeCommentsPattern.test(this.currentLine);
    while (this.moveToNextLine()) {
      indent = this.getCurrentLineIndentation();
      if (indent === newIndent) {
        removeComments = !removeCommentsPattern.test(this.currentLine);
      }
      if (isItUnindentedCollection && !this.isStringUnIndentedCollectionItem(this.currentLine) && indent === newIndent) {
        this.moveToPreviousLine();
        break;
      }
      if (this.isCurrentLineBlank()) {
        data.push(this.currentLine.slice(newIndent));
        continue;
      }
      if (removeComments && this.isCurrentLineComment()) {
        if (indent === newIndent) {
          continue;
        }
      }
      if (indent >= newIndent) {
        data.push(this.currentLine.slice(newIndent));
      } else if (0 === indent) {
        this.moveToPreviousLine();
        break;
      } else {
        throw new ParseException('Indentation problem.', this.getRealCurrentLineNb() + 1, this.currentLine);
      }
    }
    return data.join("\n");
  };

  Parser.prototype.moveToNextLine = function() {
    if (this.currentLineNb >= this.lines.length - 1) {
      return false;
    }
    this.currentLine = this.lines[++this.currentLineNb];
    return true;
  };

  Parser.prototype.moveToPreviousLine = function() {
    this.currentLine = this.lines[--this.currentLineNb];
  };

  Parser.prototype.parseValue = function(value, exceptionOnInvalidType, objectDecoder) {
    var e, foldedIndent, matches, modifiers, pos, val, _ref, _ref1;
    if (0 === value.indexOf('*')) {
      pos = value.indexOf('#');
      if (pos !== -1) {
        value = value.substr(1, pos - 2);
      } else {
        value = value.slice(1);
      }
      if (this.refs[value] === void 0) {
        throw new ParseException('Reference "' + value + '" does not exist.', this.currentLine);
      }
      return this.refs[value];
    }
    if (matches = this.PATTERN_FOLDED_SCALAR_ALL.exec(value)) {
      modifiers = (_ref = matches.modifiers) != null ? _ref : '';
      foldedIndent = Math.abs(parseInt(modifiers));
      if (isNaN(foldedIndent)) {
        foldedIndent = 0;
      }
      val = this.parseFoldedScalar(matches.separator, this.PATTERN_DECIMAL.replace(modifiers, ''), foldedIndent);
      if (matches.type != null) {
        Inline.configure(exceptionOnInvalidType, objectDecoder);
        return Inline.parseScalar(matches.type + ' ' + val);
      } else {
        return val;
      }
    }
    try {
      return Inline.parse(value, exceptionOnInvalidType, objectDecoder);
    } catch (_error) {
      e = _error;
      if (((_ref1 = value.charAt(0)) === '[' || _ref1 === '{') && e instanceof ParseException && this.isNextLineIndented()) {
        value += "\n" + this.getNextEmbedBlock();
        try {
          return Inline.parse(value, exceptionOnInvalidType, objectDecoder);
        } catch (_error) {
          e = _error;
          e.parsedLine = this.getRealCurrentLineNb() + 1;
          e.snippet = this.currentLine;
          throw e;
        }
      } else {
        e.parsedLine = this.getRealCurrentLineNb() + 1;
        e.snippet = this.currentLine;
        throw e;
      }
    }
  };

  Parser.prototype.parseFoldedScalar = function(separator, indicator, indentation) {
    var isCurrentLineBlank, line, matches, newText, notEOF, pattern, text, _i, _len, _ref;
    if (indicator == null) {
      indicator = '';
    }
    if (indentation == null) {
      indentation = 0;
    }
    notEOF = this.moveToNextLine();
    if (!notEOF) {
      return '';
    }
    isCurrentLineBlank = this.isCurrentLineBlank();
    text = '';
    while (notEOF && isCurrentLineBlank) {
      if (notEOF = this.moveToNextLine()) {
        text += "\n";
        isCurrentLineBlank = this.isCurrentLineBlank();
      }
    }
    if (0 === indentation) {
      if (matches = this.PATTERN_INDENT_SPACES.exec(this.currentLine)) {
        indentation = matches[0].length;
      }
    }
    if (indentation > 0) {
      pattern = this.PATTERN_FOLDED_SCALAR_BY_INDENTATION[indentation];
      if (pattern == null) {
        pattern = new Pattern('^ {' + indentation + '}(.*)$');
        Parser.prototype.PATTERN_FOLDED_SCALAR_BY_INDENTATION[indentation] = pattern;
      }
      while (notEOF && (isCurrentLineBlank || (matches = pattern.exec(this.currentLine)))) {
        if (isCurrentLineBlank) {
          text += this.currentLine.slice(indentation);
        } else {
          text += matches[1];
        }
        if (notEOF = this.moveToNextLine()) {
          text += "\n";
          isCurrentLineBlank = this.isCurrentLineBlank();
        }
      }
    } else if (notEOF) {
      text += "\n";
    }
    if (notEOF) {
      this.moveToPreviousLine();
    }
    if ('>' === separator) {
      newText = '';
      _ref = text.split("\n");
      for (_i = 0, _len = _ref.length; _i < _len; _i++) {
        line = _ref[_i];
        if (line.length === 0 || line.charAt(0) === ' ') {
          newText = Utils.rtrim(newText, ' ') + line + "\n";
        } else {
          newText += line + ' ';
        }
      }
      text = newText;
    }
    if ('+' !== indicator) {
      text = Utils.rtrim(text);
    }
    if ('' === indicator) {
      text = this.PATTERN_TRAILING_LINES.replace(text, "\n");
    } else if ('-' === indicator) {
      text = this.PATTERN_TRAILING_LINES.replace(text, '');
    }
    return text;
  };

  Parser.prototype.isNextLineIndented = function(ignoreComments) {
    var EOF, currentIndentation, ret;
    if (ignoreComments == null) {
      ignoreComments = true;
    }
    currentIndentation = this.getCurrentLineIndentation();
    EOF = !this.moveToNextLine();
    if (ignoreComments) {
      while (!EOF && this.isCurrentLineEmpty()) {
        EOF = !this.moveToNextLine();
      }
    } else {
      while (!EOF && this.isCurrentLineBlank()) {
        EOF = !this.moveToNextLine();
      }
    }
    if (EOF) {
      return false;
    }
    ret = false;
    if (this.getCurrentLineIndentation() > currentIndentation) {
      ret = true;
    }
    this.moveToPreviousLine();
    return ret;
  };

  Parser.prototype.isCurrentLineEmpty = function() {
    var trimmedLine;
    trimmedLine = Utils.trim(this.currentLine, ' ');
    return trimmedLine.length === 0 || trimmedLine.charAt(0) === '#';
  };

  Parser.prototype.isCurrentLineBlank = function() {
    return '' === Utils.trim(this.currentLine, ' ');
  };

  Parser.prototype.isCurrentLineComment = function() {
    var ltrimmedLine;
    ltrimmedLine = Utils.ltrim(this.currentLine, ' ');
    return ltrimmedLine.charAt(0) === '#';
  };

  Parser.prototype.cleanup = function(value) {
    var count, trimmedValue, _ref, _ref1, _ref2;
    if (value.indexOf("\r") !== -1) {
      value = value.split("\r\n").join("\n").split("\r").join("\n");
    }
    count = 0;
    _ref = this.PATTERN_YAML_HEADER.replaceAll(value, ''), value = _ref[0], count = _ref[1];
    this.offset += count;
    _ref1 = this.PATTERN_LEADING_COMMENTS.replaceAll(value, '', 1), trimmedValue = _ref1[0], count = _ref1[1];
    if (count === 1) {
      this.offset += Utils.subStrCount(value, "\n") - Utils.subStrCount(trimmedValue, "\n");
      value = trimmedValue;
    }
    _ref2 = this.PATTERN_DOCUMENT_MARKER_START.replaceAll(value, '', 1), trimmedValue = _ref2[0], count = _ref2[1];
    if (count === 1) {
      this.offset += Utils.subStrCount(value, "\n") - Utils.subStrCount(trimmedValue, "\n");
      value = trimmedValue;
      value = this.PATTERN_DOCUMENT_MARKER_END.replace(value, '');
    }
    return value;
  };

  Parser.prototype.isNextLineUnIndentedCollection = function(currentIndentation) {
    var notEOF, ret;
    if (currentIndentation == null) {
      currentIndentation = null;
    }
    if (currentIndentation == null) {
      currentIndentation = this.getCurrentLineIndentation();
    }
    notEOF = this.moveToNextLine();
    while (notEOF && this.isCurrentLineEmpty()) {
      notEOF = this.moveToNextLine();
    }
    if (false === notEOF) {
      return false;
    }
    ret = false;
    if (this.getCurrentLineIndentation() === currentIndentation && this.isStringUnIndentedCollectionItem(this.currentLine)) {
      ret = true;
    }
    this.moveToPreviousLine();
    return ret;
  };

  Parser.prototype.isStringUnIndentedCollectionItem = function() {
    return this.currentLine === '-' || this.currentLine.slice(0, 2) === '- ';
  };

  return Parser;

})();

module.exports = Parser;