path: root/lib/Inline.js

// Generated by CoffeeScript 2.4.1
var DumpException, Escaper, Inline, ParseException, ParseMore, Pattern, Unescaper, Utils,
  indexOf = [].indexOf;

Pattern = require('./Pattern');

Unescaper = require('./Unescaper');

Escaper = require('./Escaper');

Utils = require('./Utils');

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

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

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

Inline = (function() {
  // Inline YAML parsing and dumping
  class Inline {
    // Configure YAML inline.

    // @param [Boolean]  exceptionOnInvalidType  true if an exception must be thrown on invalid types (a JavaScript resource or object), false otherwise
    // @param [Function] objectDecoder           A function to deserialize custom objects, null otherwise

    static configure(exceptionOnInvalidType = null, objectDecoder = null) {
      // Update settings
      this.settings.exceptionOnInvalidType = exceptionOnInvalidType;
      this.settings.objectDecoder = objectDecoder;
    }

    // Converts a YAML string to a JavaScript object.

    // @param [String]   value                   A YAML string
    // @param [Boolean]  exceptionOnInvalidType  true if an exception must be thrown on invalid types (a JavaScript resource or object), false otherwise
    // @param [Function] objectDecoder           A function to deserialize custom objects, null otherwise

    // @return [Object]  A JavaScript object representing the YAML string

    // @throw [ParseException]

    static parse(value, exceptionOnInvalidType = false, objectDecoder = null) {
      var context, result;
      // Update settings from last call of Inline.parse()
      this.settings.exceptionOnInvalidType = exceptionOnInvalidType;
      this.settings.objectDecoder = objectDecoder;
      if (value == null) {
        return '';
      }
      value = Utils.trim(value);
      if (0 === value.length) {
        return '';
      }
      // Keep a context object to pass through static methods
      context = {
        exceptionOnInvalidType,
        objectDecoder,
        i: 0
      };
      switch (value.charAt(0)) {
        case '[':
          result = this.parseSequence(value, context);
          ++context.i;
          break;
        case '{':
          result = this.parseMapping(value, context);
          ++context.i;
          break;
        default:
          result = this.parseScalar(value, null, ['"', "'"], context);
      }
      // Some comments are allowed at the end
      if (this.PATTERN_TRAILING_COMMENTS.replace(value.slice(context.i), '') !== '') {
        throw new ParseException('Unexpected characters near "' + value.slice(context.i) + '".');
      }
      return result;
    }

    // Dumps a given JavaScript variable to a YAML string.

    // @param [Object]   value                   The JavaScript variable to convert
    // @param [Boolean]  exceptionOnInvalidType  true if an exception must be thrown on invalid types (a JavaScript resource or object), false otherwise
    // @param [Function] objectEncoder           A function to serialize custom objects, null otherwise

    // @return [String]  The YAML string representing the JavaScript object

    // @throw [DumpException]

    static dump(value, exceptionOnInvalidType = false, objectEncoder = null) {
      var ref, result, type;
      if (value == null) {
        return 'null';
      }
      type = typeof value;
      if (type === 'object') {
        if (value instanceof Date) {
          return value.toISOString();
        } else if (objectEncoder != null) {
          result = objectEncoder(value);
          if (typeof result === 'string' || (result != null)) {
            return result;
          }
        }
        return this.dumpObject(value);
      }
      if (type === 'boolean') {
        return (value ? 'true' : 'false');
      }
      if (Utils.isDigits(value)) {
        return (type === 'string' ? "'" + value + "'" : String(parseInt(value)));
      }
      if (Utils.isNumeric(value)) {
        return (type === 'string' ? "'" + value + "'" : String(parseFloat(value)));
      }
      if (type === 'number') {
        return (value === 2e308 ? '.Inf' : (value === -2e308 ? '-.Inf' : (isNaN(value) ? '.NaN' : value)));
      }
      if (Escaper.requiresDoubleQuoting(value)) {
        return Escaper.escapeWithDoubleQuotes(value);
      }
      if (Escaper.requiresSingleQuoting(value)) {
        return Escaper.escapeWithSingleQuotes(value);
      }
      if ('' === value) {
        return '""';
      }
      if (Utils.PATTERN_DATE.test(value)) {
        return "'" + value + "'";
      }
      if ((ref = value.toLowerCase()) === 'null' || ref === '~' || ref === 'true' || ref === 'false') {
        return "'" + value + "'";
      }
      // Default
      return value;
    }

    static dumpObject(value, exceptionOnInvalidType, objectSupport = null) {
      var j, key, len1, output, val;
      // Array
      if (value instanceof Array) {
        output = [];
        for (j = 0, len1 = value.length; j < len1; j++) {
          val = value[j];
          output.push(this.dump(val));
        }
        return '[' + output.join(', ') + ']';
      } else {
        // Mapping
        output = [];
        for (key in value) {
          val = value[key];
          output.push(this.dump(key) + ': ' + this.dump(val));
        }
        return '{' + output.join(', ') + '}';
      }
    }

    // Parses a scalar to a YAML string.

    // @param [Object]   scalar
    // @param [Array]    delimiters
    // @param [Array]    stringDelimiters
    // @param [Object]   context
    // @param [Boolean]  evaluate

    // @return [String]  A YAML string

    // @throw [ParseException] When malformed inline YAML string is parsed

    static parseScalar(scalar, delimiters = null, stringDelimiters = ['"', "'"], context = null, evaluate = true) {
      var i, joinedDelimiters, match, output, pattern, ref, ref1, strpos, tmp;
      if (context == null) {
        context = {
          exceptionOnInvalidType: this.settings.exceptionOnInvalidType,
          objectDecoder: this.settings.objectDecoder,
          i: 0
        };
      }
      ({i} = context);
      if (ref = scalar.charAt(i), indexOf.call(stringDelimiters, ref) >= 0) {
        // Quoted scalar
        output = this.parseQuotedScalar(scalar, context);
        ({i} = context);
        if (delimiters != null) {
          tmp = Utils.ltrim(scalar.slice(i), ' ');
          if (!(ref1 = tmp.charAt(0), indexOf.call(delimiters, ref1) >= 0)) {
            throw new ParseException('Unexpected characters (' + scalar.slice(i) + ').');
          }
        }
      } else {
        // "normal" string
        if (!delimiters) {
          output = scalar.slice(i);
          i += output.length;
          // Remove comments
          strpos = output.indexOf(' #');
          if (strpos !== -1) {
            output = Utils.rtrim(output.slice(0, strpos));
          }
        } else {
          joinedDelimiters = delimiters.join('|');
          pattern = this.PATTERN_SCALAR_BY_DELIMITERS[joinedDelimiters];
          if (pattern == null) {
            pattern = new Pattern('^(.+?)(' + joinedDelimiters + ')');
            this.PATTERN_SCALAR_BY_DELIMITERS[joinedDelimiters] = pattern;
          }
          if (match = pattern.exec(scalar.slice(i))) {
            output = match[1];
            i += output.length;
          } else {
            throw new ParseException('Malformed inline YAML string (' + scalar + ').');
          }
        }
        if (evaluate) {
          output = this.evaluateScalar(output, context);
        }
      }
      context.i = i;
      return output;
    }

    // Parses a quoted scalar to YAML.

    // @param [String]   scalar
    // @param [Object]   context

    // @return [String]  A YAML string

    // @throw [ParseMore] When malformed inline YAML string is parsed

    static parseQuotedScalar(scalar, context) {
      var i, match, output;
      ({i} = context);
      if (!(match = this.PATTERN_QUOTED_SCALAR.exec(scalar.slice(i)))) {
        throw new ParseMore('Malformed inline YAML string (' + scalar.slice(i) + ').');
      }
      output = match[0].substr(1, match[0].length - 2);
      if ('"' === scalar.charAt(i)) {
        output = Unescaper.unescapeDoubleQuotedString(output);
      } else {
        output = Unescaper.unescapeSingleQuotedString(output);
      }
      i += match[0].length;
      context.i = i;
      return output;
    }

    // Parses a sequence to a YAML string.

    // @param [String]   sequence
    // @param [Object]   context

    // @return [String]  A YAML string

    // @throw [ParseMore] When malformed inline YAML string is parsed

    static parseSequence(sequence, context) {
      var e, i, isQuoted, len, output, ref, value;
      output = [];
      len = sequence.length;
      ({i} = context);
      i += 1;
      // [foo, bar, ...]
      while (i < len) {
        context.i = i;
        switch (sequence.charAt(i)) {
          case '[':
            // Nested sequence
            output.push(this.parseSequence(sequence, context));
            ({i} = context);
            break;
          case '{':
            // Nested mapping
            output.push(this.parseMapping(sequence, context));
            ({i} = context);
            break;
          case ']':
            return output;
          case ',':
          case ' ':
          case "\n":
            break;
          default:
            // Do nothing
            isQuoted = ((ref = sequence.charAt(i)) === '"' || ref === "'");
            value = this.parseScalar(sequence, [',', ']'], ['"', "'"], context);
            ({i} = context);
            if (!isQuoted && typeof value === 'string' && (value.indexOf(': ') !== -1 || value.indexOf(":\n") !== -1)) {
              try {
                // Embedded mapping?
                value = this.parseMapping('{' + value + '}');
              } catch (error) {
                e = error;
              }
            }
            // No, it's not
            output.push(value);
            --i;
        }
        ++i;
      }
      throw new ParseMore('Malformed inline YAML string ' + sequence);
    }

    // Parses a mapping to a YAML string.

    // @param [String]   mapping
    // @param [Object]   context

    // @return [String]  A YAML string

    // @throw [ParseMore] When malformed inline YAML string is parsed

    static parseMapping(mapping, context) {
      var done, i, key, len, output, shouldContinueWhileLoop, value;
      output = {};
      len = mapping.length;
      ({i} = context);
      i += 1;
      // {foo: bar, bar:foo, ...}
      shouldContinueWhileLoop = false;
      while (i < len) {
        context.i = i;
        switch (mapping.charAt(i)) {
          case ' ':
          case ',':
          case "\n":
            ++i;
            context.i = i;
            shouldContinueWhileLoop = true;
            break;
          case '}':
            return output;
        }
        if (shouldContinueWhileLoop) {
          shouldContinueWhileLoop = false;
          continue;
        }
        // Key
        key = this.parseScalar(mapping, [':', ' ', "\n"], ['"', "'"], context, false);
        ({i} = context);
        // Value
        done = false;
        while (i < len) {
          context.i = i;
          switch (mapping.charAt(i)) {
            case '[':
              // Nested sequence
              value = this.parseSequence(mapping, context);
              ({i} = context);
              // Spec: Keys MUST be unique; first one wins.
              // Parser cannot abort this mapping earlier, since lines
              // are processed sequentially.
              if (output[key] === void 0) {
                output[key] = value;
              }
              done = true;
              break;
            case '{':
              // Nested mapping
              value = this.parseMapping(mapping, context);
              ({i} = context);
              // Spec: Keys MUST be unique; first one wins.
              // Parser cannot abort this mapping earlier, since lines
              // are processed sequentially.
              if (output[key] === void 0) {
                output[key] = value;
              }
              done = true;
              break;
            case ':':
            case ' ':
            case "\n":
              break;
            default:
              // Do nothing
              value = this.parseScalar(mapping, [',', '}'], ['"', "'"], context);
              ({i} = context);
              // Spec: Keys MUST be unique; first one wins.
              // Parser cannot abort this mapping earlier, since lines
              // are processed sequentially.
              if (output[key] === void 0) {
                output[key] = value;
              }
              done = true;
              --i;
          }
          ++i;
          if (done) {
            break;
          }
        }
      }
      throw new ParseMore('Malformed inline YAML string ' + mapping);
    }

    // Evaluates scalars and replaces magic values.

    // @param [String]   scalar

    // @return [String]  A YAML string

    static evaluateScalar(scalar, context) {
      var cast, date, exceptionOnInvalidType, firstChar, firstSpace, firstWord, objectDecoder, raw, scalarLower, subValue, trimmedScalar;
      scalar = Utils.trim(scalar);
      scalarLower = scalar.toLowerCase();
      switch (scalarLower) {
        case 'null':
        case '':
        case '~':
          return null;
        case 'true':
          return true;
        case 'false':
          return false;
        case '.inf':
          return 2e308;
        case '.nan':
          return 0/0;
        case '-.inf':
          return 2e308;
        default:
          firstChar = scalarLower.charAt(0);
          switch (firstChar) {
            case '!':
              firstSpace = scalar.indexOf(' ');
              if (firstSpace === -1) {
                firstWord = scalarLower;
              } else {
                firstWord = scalarLower.slice(0, firstSpace);
              }
              switch (firstWord) {
                case '!':
                  if (firstSpace !== -1) {
                    return parseInt(this.parseScalar(scalar.slice(2)));
                  }
                  return null;
                case '!str':
                  return Utils.ltrim(scalar.slice(4));
                case '!!str':
                  return Utils.ltrim(scalar.slice(5));
                case '!!int':
                  return parseInt(this.parseScalar(scalar.slice(5)));
                case '!!bool':
                  return Utils.parseBoolean(this.parseScalar(scalar.slice(6)), false);
                case '!!float':
                  return parseFloat(this.parseScalar(scalar.slice(7)));
                case '!!timestamp':
                  return Utils.stringToDate(Utils.ltrim(scalar.slice(11)));
                default:
                  if (context == null) {
                    context = {
                      exceptionOnInvalidType: this.settings.exceptionOnInvalidType,
                      objectDecoder: this.settings.objectDecoder,
                      i: 0
                    };
                  }
                  ({objectDecoder, exceptionOnInvalidType} = context);
                  if (objectDecoder) {
                    // If objectDecoder function is given, we can do custom decoding of custom types
                    trimmedScalar = Utils.rtrim(scalar);
                    firstSpace = trimmedScalar.indexOf(' ');
                    if (firstSpace === -1) {
                      return objectDecoder(trimmedScalar, null);
                    } else {
                      subValue = Utils.ltrim(trimmedScalar.slice(firstSpace + 1));
                      if (!(subValue.length > 0)) {
                        subValue = null;
                      }
                      return objectDecoder(trimmedScalar.slice(0, firstSpace), subValue);
                    }
                  }
                  if (exceptionOnInvalidType) {
                    throw new ParseException('Custom object support when parsing a YAML file has been disabled.');
                  }
                  return null;
              }
              break;
            case '0':
              if ('0x' === scalar.slice(0, 2)) {
                return Utils.hexDec(scalar);
              } else if (Utils.isDigits(scalar)) {
                return Utils.octDec(scalar);
              } else if (Utils.isNumeric(scalar)) {
                return parseFloat(scalar);
              } else {
                return scalar;
              }
              break;
            case '+':
              if (Utils.isDigits(scalar)) {
                raw = scalar;
                cast = parseInt(raw);
                if (raw === String(cast)) {
                  return cast;
                } else {
                  return raw;
                }
              } else if (Utils.isNumeric(scalar)) {
                return parseFloat(scalar);
              } else if (this.PATTERN_THOUSAND_NUMERIC_SCALAR.test(scalar)) {
                return parseFloat(scalar.replace(',', ''));
              }
              return scalar;
            case '-':
              if (Utils.isDigits(scalar.slice(1))) {
                if ('0' === scalar.charAt(1)) {
                  return -Utils.octDec(scalar.slice(1));
                } else {
                  raw = scalar.slice(1);
                  cast = parseInt(raw);
                  if (raw === String(cast)) {
                    return -cast;
                  } else {
                    return -raw;
                  }
                }
              } else if (Utils.isNumeric(scalar)) {
                return parseFloat(scalar);
              } else if (this.PATTERN_THOUSAND_NUMERIC_SCALAR.test(scalar)) {
                return parseFloat(scalar.replace(',', ''));
              }
              return scalar;
            default:
              if (date = Utils.stringToDate(scalar)) {
                return date;
              } else if (Utils.isNumeric(scalar)) {
                return parseFloat(scalar);
              } else if (this.PATTERN_THOUSAND_NUMERIC_SCALAR.test(scalar)) {
                return parseFloat(scalar.replace(',', ''));
              }
              return scalar;
          }
      }
    }

  };

  // Quoted string regular expression
  Inline.REGEX_QUOTED_STRING = '(?:"(?:[^"\\\\]*(?:\\\\.[^"\\\\]*)*)"|\'(?:[^\']*(?:\'\'[^\']*)*)\')';

  // Pre-compiled patterns

  Inline.PATTERN_TRAILING_COMMENTS = new Pattern('^\\s*#.*$');

  Inline.PATTERN_QUOTED_SCALAR = new Pattern('^' + Inline.REGEX_QUOTED_STRING);

  Inline.PATTERN_THOUSAND_NUMERIC_SCALAR = new Pattern('^(-|\\+)?[0-9,]+(\\.[0-9]+)?$');

  Inline.PATTERN_SCALAR_BY_DELIMITERS = {};

  // Settings
  Inline.settings = {};

  return Inline;

}).call(this);

module.exports = Inline;