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Editing File: /usr/share/nodejs/js-yaml/lib/schema.js

'use strict';

/*eslint-disable max-len*/

var YAMLException = require('./exception');
var Type          = require('./type');

function compileList(schema, name) {
  var result = [];

schema[name].forEach(function (currentType) {
    var newIndex = result.length;

result.forEach(function (previousType, previousIndex) {
      if (previousType.tag === currentType.tag &&
          previousType.kind === currentType.kind &&
          previousType.multi === currentType.multi) {

newIndex = previousIndex;
      }
    });

result[newIndex] = currentType;
  });

return result;
}

function compileMap(/* lists... */) {
  var result = {
        scalar: {},
        sequence: {},
        mapping: {},
        fallback: {},
        multi: {
          scalar: [],
          sequence: [],
          mapping: [],
          fallback: []
        }
      }, index, length;

for (index = 0, length = arguments.length; index < length; index += 1) {
    arguments[index].forEach(collectType);
  }
  return result;
}

function Schema(definition) {
  return this.extend(definition);
}

Schema.prototype.extend = function extend(definition) {
  var implicit = [];
  var explicit = [];

if (definition instanceof Type) {
    // Schema.extend(type)
    explicit.push(definition);

} else if (Array.isArray(definition)) {
    // Schema.extend([ type1, type2, ... ])
    explicit = explicit.concat(definition);

} else if (definition && (Array.isArray(definition.implicit) || Array.isArray(definition.explicit))) {
    // Schema.extend({ explicit: [ type1, type2, ... ], implicit: [ type1, type2, ... ] })
    if (definition.implicit) implicit = implicit.concat(definition.implicit);
    if (definition.explicit) explicit = explicit.concat(definition.explicit);

} else {
    throw new YAMLException('Schema.extend argument should be a Type, [ Type ], ' +
      'or a schema definition ({ implicit: [...], explicit: [...] })');
  }

implicit.forEach(function (type) {
    if (!(type instanceof Type)) {
      throw new YAMLException('Specified list of YAML types (or a single Type object) contains a non-Type object.');
    }

if (type.loadKind && type.loadKind !== 'scalar') {
      throw new YAMLException('There is a non-scalar type in the implicit list of a schema. Implicit resolving of such types is not supported.');
    }

if (type.multi) {
      throw new YAMLException('There is a multi type in the implicit list of a schema. Multi tags can only be listed as explicit.');
    }
  });

explicit.forEach(function (type) {
    if (!(type instanceof Type)) {
      throw new YAMLException('Specified list of YAML types (or a single Type object) contains a non-Type object.');
    }
  });

var result = Object.create(Schema.prototype);

result.implicit = (this.implicit || []).concat(implicit);
  result.explicit = (this.explicit || []).concat(explicit);

result.compiledImplicit = compileList(result, 'implicit');
  result.compiledExplicit = compileList(result, 'explicit');
  result.compiledTypeMap  = compileMap(result.compiledImplicit, result.compiledExplicit);

return result;
};

module.exports = Schema;

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