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'use strict';

var PlainValue = require('./PlainValue-ec8e588e.js');
var resolveSeq = require('./resolveSeq-d03cb037.js');
var warnings = require('./warnings-1000a372.js');

function createMap(schema, obj, ctx) {
  const map = new resolveSeq.YAMLMap(schema);

  if (obj instanceof Map) {
    for (const [key, value] of obj) map.items.push(schema.createPair(key, value, ctx));
  } else if (obj && typeof obj === 'object') {
    for (const key of Object.keys(obj)) map.items.push(schema.createPair(key, obj[key], ctx));
  }

  if (typeof schema.sortMapEntries === 'function') {
    map.items.sort(schema.sortMapEntries);
  }

  return map;
}

const map = {
  createNode: createMap,
  default: true,
  nodeClass: resolveSeq.YAMLMap,
  tag: 'tag:yaml.org,2002:map',
  resolve: resolveSeq.resolveMap
};

function createSeq(schema, obj, ctx) {
  const seq = new resolveSeq.YAMLSeq(schema);

  if (obj && obj[Symbol.iterator]) {
    for (const it of obj) {
      const v = schema.createNode(it, ctx.wrapScalars, null, ctx);
      seq.items.push(v);
    }
  }

  return seq;
}

const seq = {
  createNode: createSeq,
  default: true,
  nodeClass: resolveSeq.YAMLSeq,
  tag: 'tag:yaml.org,2002:seq',
  resolve: resolveSeq.resolveSeq
};

const string = {
  identify: value => typeof value === 'string',
  default: true,
  tag: 'tag:yaml.org,2002:str',
  resolve: resolveSeq.resolveString,

  stringify(item, ctx, onComment, onChompKeep) {
    ctx = Object.assign({
      actualString: true
    }, ctx);
    return resolveSeq.stringifyString(item, ctx, onComment, onChompKeep);
  },

  options: resolveSeq.strOptions
};

const failsafe = [map, seq, string];

/* global BigInt */

const intIdentify$2 = value => typeof value === 'bigint' || Number.isInteger(value);

const intResolve$1 = (src, part, radix) => resolveSeq.intOptions.asBigInt ? BigInt(src) : parseInt(part, radix);

function intStringify$1(node, radix, prefix) {
  const {
    value
  } = node;
  if (intIdentify$2(value) && value >= 0) return prefix + value.toString(radix);
  return resolveSeq.stringifyNumber(node);
}

const nullObj = {
  identify: value => value == null,
  createNode: (schema, value, ctx) => ctx.wrapScalars ? new resolveSeq.Scalar(null) : null,
  default: true,
  tag: 'tag:yaml.org,2002:null',
  test: /^(?:~|[Nn]ull|NULL)?$/,
  resolve: () => null,
  options: resolveSeq.nullOptions,
  stringify: () => resolveSeq.nullOptions.nullStr
};
const boolObj = {
  identify: value => typeof value === 'boolean',
  default: true,
  tag: 'tag:yaml.org,2002:bool',
  test: /^(?:[Tt]rue|TRUE|[Ff]alse|FALSE)$/,
  resolve: str => str[0] === 't' || str[0] === 'T',
  options: resolveSeq.boolOptions,
  stringify: ({
    value
  }) => value ? resolveSeq.boolOptions.trueStr : resolveSeq.boolOptions.falseStr
};
const octObj = {
  identify: value => intIdentify$2(value) && value >= 0,
  default: true,
  tag: 'tag:yaml.org,2002:int',
  format: 'OCT',
  test: /^0o([0-7]+)$/,
  resolve: (str, oct) => intResolve$1(str, oct, 8),
  options: resolveSeq.intOptions,
  stringify: node => intStringify$1(node, 8, '0o')
};
const intObj = {
  identify: intIdentify$2,
  default: true,
  tag: 'tag:yaml.org,2002:int',
  test: /^[-+]?[0-9]+$/,
  resolve: str => intResolve$1(str, str, 10),
  options: resolveSeq.intOptions,
  stringify: resolveSeq.stringifyNumber
};
const hexObj = {
  identify: value => intIdentify$2(value) && value >= 0,
  default: true,
  tag: 'tag:yaml.org,2002:int',
  format: 'HEX',
  test: /^0x([0-9a-fA-F]+)$/,
  resolve: (str, hex) => intResolve$1(str, hex, 16),
  options: resolveSeq.intOptions,
  stringify: node => intStringify$1(node, 16, '0x')
};
const nanObj = {
  identify: value => typeof value === 'number',
  default: true,
  tag: 'tag:yaml.org,2002:float',
  test: /^(?:[-+]?\.inf|(\.nan))$/i,
  resolve: (str, nan) => nan ? NaN : str[0] === '-' ? Number.NEGATIVE_INFINITY : Number.POSITIVE_INFINITY,
  stringify: resolveSeq.stringifyNumber
};
const expObj = {
  identify: value => typeof value === 'number',
  default: true,
  tag: 'tag:yaml.org,2002:float',
  format: 'EXP',
  test: /^[-+]?(?:\.[0-9]+|[0-9]+(?:\.[0-9]*)?)[eE][-+]?[0-9]+$/,
  resolve: str => parseFloat(str),
  stringify: ({
    value
  }) => Number(value).toExponential()
};
const floatObj = {
  identify: value => typeof value === 'number',
  default: true,
  tag: 'tag:yaml.org,2002:float',
  test: /^[-+]?(?:\.([0-9]+)|[0-9]+\.([0-9]*))$/,

  resolve(str, frac1, frac2) {
    const frac = frac1 || frac2;
    const node = new resolveSeq.Scalar(parseFloat(str));
    if (frac && frac[frac.length - 1] === '0') node.minFractionDigits = frac.length;
    return node;
  },

  stringify: resolveSeq.stringifyNumber
};
const core = failsafe.concat([nullObj, boolObj, octObj, intObj, hexObj, nanObj, expObj, floatObj]);

/* global BigInt */

const intIdentify$1 = value => typeof value === 'bigint' || Number.isInteger(value);

const stringifyJSON = ({
  value
}) => JSON.stringify(value);

const json = [map, seq, {
  identify: value => typeof value === 'string',
  default: true,
  tag: 'tag:yaml.org,2002:str',
  resolve: resolveSeq.resolveString,
  stringify: stringifyJSON
}, {
  identify: value => value == null,
  createNode: (schema, value, ctx) => ctx.wrapScalars ? new resolveSeq.Scalar(null) : null,
  default: true,
  tag: 'tag:yaml.org,2002:null',
  test: /^null$/,
  resolve: () => null,
  stringify: stringifyJSON
}, {
  identify: value => typeof value === 'boolean',
  default: true,
  tag: 'tag:yaml.org,2002:bool',
  test: /^true|false$/,
  resolve: str => str === 'true',
  stringify: stringifyJSON
}, {
  identify: intIdentify$1,
  default: true,
  tag: 'tag:yaml.org,2002:int',
  test: /^-?(?:0|[1-9][0-9]*)$/,
  resolve: str => resolveSeq.intOptions.asBigInt ? BigInt(str) : parseInt(str, 10),
  stringify: ({
    value
  }) => intIdentify$1(value) ? value.toString() : JSON.stringify(value)
}, {
  identify: value => typeof value === 'number',
  default: true,
  tag: 'tag:yaml.org,2002:float',
  test: /^-?(?:0|[1-9][0-9]*)(?:\.[0-9]*)?(?:[eE][-+]?[0-9]+)?$/,
  resolve: str => parseFloat(str),
  stringify: stringifyJSON
}];

json.scalarFallback = str => {
  throw new SyntaxError(`Unresolved plain scalar ${JSON.stringify(str)}`);
};

/* global BigInt */

const boolStringify = ({
  value
}) => value ? resolveSeq.boolOptions.trueStr : resolveSeq.boolOptions.falseStr;

const intIdentify = value => typeof value === 'bigint' || Number.isInteger(value);

function intResolve(sign, src, radix) {
  let str = src.replace(/_/g, '');

  if (resolveSeq.intOptions.asBigInt) {
    switch (radix) {
      case 2:
        str = `0b${str}`;
        break;

      case 8:
        str = `0o${str}`;
        break;

      case 16:
        str = `0x${str}`;
        break;
    }

    const n = BigInt(str);
    return sign === '-' ? BigInt(-1) * n : n;
  }

  const n = parseInt(str, radix);
  return sign === '-' ? -1 * n : n;
}

function intStringify(node, radix, prefix) {
  const {
    value
  } = node;

  if (intIdentify(value)) {
    const str = value.toString(radix);
    return value < 0 ? '-' + prefix + str.substr(1) : prefix + str;
  }

  return resolveSeq.stringifyNumber(node);
}

const yaml11 = failsafe.concat([{
  identify: value => value == null,
  createNode: (schema, value, ctx) => ctx.wrapScalars ? new resolveSeq.Scalar(null) : null,
  default: true,
  tag: 'tag:yaml.org,2002:null',
  test: /^(?:~|[Nn]ull|NULL)?$/,
  resolve: () => null,
  options: resolveSeq.nullOptions,
  stringify: () => resolveSeq.nullOptions.nullStr
}, {
  identify: value => typeof value === 'boolean',
  default: true,
  tag: 'tag:yaml.org,2002:bool',
  test: /^(?:Y|y|[Yy]es|YES|[Tt]rue|TRUE|[Oo]n|ON)$/,
  resolve: () => true,
  options: resolveSeq.boolOptions,
  stringify: boolStringify
}, {
  identify: value => typeof value === 'boolean',
  default: true,
  tag: 'tag:yaml.org,2002:bool',
  test: /^(?:N|n|[Nn]o|NO|[Ff]alse|FALSE|[Oo]ff|OFF)$/i,
  resolve: () => false,
  options: resolveSeq.boolOptions,
  stringify: boolStringify
}, {
  identify: intIdentify,
  default: true,
  tag: 'tag:yaml.org,2002:int',
  format: 'BIN',
  test: /^([-+]?)0b([0-1_]+)$/,
  resolve: (str, sign, bin) => intResolve(sign, bin, 2),
  stringify: node => intStringify(node, 2, '0b')
}, {
  identify: intIdentify,
  default: true,
  tag: 'tag:yaml.org,2002:int',
  format: 'OCT',
  test: /^([-+]?)0([0-7_]+)$/,
  resolve: (str, sign, oct) => intResolve(sign, oct, 8),
  stringify: node => intStringify(node, 8, '0')
}, {
  identify: intIdentify,
  default: true,
  tag: 'tag:yaml.org,2002:int',
  test: /^([-+]?)([0-9][0-9_]*)$/,
  resolve: (str, sign, abs) => intResolve(sign, abs, 10),
  stringify: resolveSeq.stringifyNumber
}, {
  identify: intIdentify,
  default: true,
  tag: 'tag:yaml.org,2002:int',
  format: 'HEX',
  test: /^([-+]?)0x([0-9a-fA-F_]+)$/,
  resolve: (str, sign, hex) => intResolve(sign, hex, 16),
  stringify: node => intStringify(node, 16, '0x')
}, {
  identify: value => typeof value === 'number',
  default: true,
  tag: 'tag:yaml.org,2002:float',
  test: /^(?:[-+]?\.inf|(\.nan))$/i,
  resolve: (str, nan) => nan ? NaN : str[0] === '-' ? Number.NEGATIVE_INFINITY : Number.POSITIVE_INFINITY,
  stringify: resolveSeq.stringifyNumber
}, {
  identify: value => typeof value === 'number',
  default: true,
  tag: 'tag:yaml.org,2002:float',
  format: 'EXP',
  test: /^[-+]?([0-9][0-9_]*)?(\.[0-9_]*)?[eE][-+]?[0-9]+$/,
  resolve: str => parseFloat(str.replace(/_/g, '')),
  stringify: ({
    value
  }) => Number(value).toExponential()
}, {
  identify: value => typeof value === 'number',
  default: true,
  tag: 'tag:yaml.org,2002:float',
  test: /^[-+]?(?:[0-9][0-9_]*)?\.([0-9_]*)$/,

  resolve(str, frac) {
    const node = new resolveSeq.Scalar(parseFloat(str.replace(/_/g, '')));

    if (frac) {
      const f = frac.replace(/_/g, '');
      if (f[f.length - 1] === '0') node.minFractionDigits = f.length;
    }

    return node;
  },

  stringify: resolveSeq.stringifyNumber
}], warnings.binary, warnings.omap, warnings.pairs, warnings.set, warnings.intTime, warnings.floatTime, warnings.timestamp);

const schemas = {
  core,
  failsafe,
  json,
  yaml11
};
const tags = {
  binary: warnings.binary,
  bool: boolObj,
  float: floatObj,
  floatExp: expObj,
  floatNaN: nanObj,
  floatTime: warnings.floatTime,
  int: intObj,
  intHex: hexObj,
  intOct: octObj,
  intTime: warnings.intTime,
  map,
  null: nullObj,
  omap: warnings.omap,
  pairs: warnings.pairs,
  seq,
  set: warnings.set,
  timestamp: warnings.timestamp
};

function findTagObject(value, tagName, tags) {
  if (tagName) {
    const match = tags.filter(t => t.tag === tagName);
    const tagObj = match.find(t => !t.format) || match[0];
    if (!tagObj) throw new Error(`Tag ${tagName} not found`);
    return tagObj;
  } // TODO: deprecate/remove class check


  return tags.find(t => (t.identify && t.identify(value) || t.class && value instanceof t.class) && !t.format);
}

function createNode(value, tagName, ctx) {
  if (value instanceof resolveSeq.Node) return value;
  const {
    defaultPrefix,
    onTagObj,
    prevObjects,
    schema,
    wrapScalars
  } = ctx;
  if (tagName && tagName.startsWith('!!')) tagName = defaultPrefix + tagName.slice(2);
  let tagObj = findTagObject(value, tagName, schema.tags);

  if (!tagObj) {
    if (typeof value.toJSON === 'function') value = value.toJSON();
    if (!value || typeof value !== 'object') return wrapScalars ? new resolveSeq.Scalar(value) : value;
    tagObj = value instanceof Map ? map : value[Symbol.iterator] ? seq : map;
  }

  if (onTagObj) {
    onTagObj(tagObj);
    delete ctx.onTagObj;
  } // Detect duplicate references to the same object & use Alias nodes for all
  // after first. The `obj` wrapper allows for circular references to resolve.


  const obj = {
    value: undefined,
    node: undefined
  };

  if (value && typeof value === 'object' && prevObjects) {
    const prev = prevObjects.get(value);

    if (prev) {
      const alias = new resolveSeq.Alias(prev); // leaves source dirty; must be cleaned by caller

      ctx.aliasNodes.push(alias); // defined along with prevObjects

      return alias;
    }

    obj.value = value;
    prevObjects.set(value, obj);
  }

  obj.node = tagObj.createNode ? tagObj.createNode(ctx.schema, value, ctx) : wrapScalars ? new resolveSeq.Scalar(value) : value;
  if (tagName && obj.node instanceof resolveSeq.Node) obj.node.tag = tagName;
  return obj.node;
}

function getSchemaTags(schemas, knownTags, customTags, schemaId) {
  let tags = schemas[schemaId.replace(/\W/g, '')]; // 'yaml-1.1' -> 'yaml11'

  if (!tags) {
    const keys = Object.keys(schemas).map(key => JSON.stringify(key)).join(', ');
    throw new Error(`Unknown schema "${schemaId}"; use one of ${keys}`);
  }

  if (Array.isArray(customTags)) {
    for (const tag of customTags) tags = tags.concat(tag);
  } else if (typeof customTags === 'function') {
    tags = customTags(tags.slice());
  }

  for (let i = 0; i < tags.length; ++i) {
    const tag = tags[i];

    if (typeof tag === 'string') {
      const tagObj = knownTags[tag];

      if (!tagObj) {
        const keys = Object.keys(knownTags).map(key => JSON.stringify(key)).join(', ');
        throw new Error(`Unknown custom tag "${tag}"; use one of ${keys}`);
      }

      tags[i] = tagObj;
    }
  }

  return tags;
}

const sortMapEntriesByKey = (a, b) => a.key < b.key ? -1 : a.key > b.key ? 1 : 0;

class Schema {
  // TODO: remove in v2
  // TODO: remove in v2
  constructor({
    customTags,
    merge,
    schema,
    sortMapEntries,
    tags: deprecatedCustomTags
  }) {
    this.merge = !!merge;
    this.name = schema;
    this.sortMapEntries = sortMapEntries === true ? sortMapEntriesByKey : sortMapEntries || null;
    if (!customTags && deprecatedCustomTags) warnings.warnOptionDeprecation('tags', 'customTags');
    this.tags = getSchemaTags(schemas, tags, customTags || deprecatedCustomTags, schema);
  }

  createNode(value, wrapScalars, tagName, ctx) {
    const baseCtx = {
      defaultPrefix: Schema.defaultPrefix,
      schema: this,
      wrapScalars
    };
    const createCtx = ctx ? Object.assign(ctx, baseCtx) : baseCtx;
    return createNode(value, tagName, createCtx);
  }

  createPair(key, value, ctx) {
    if (!ctx) ctx = {
      wrapScalars: true
    };
    const k = this.createNode(key, ctx.wrapScalars, null, ctx);
    const v = this.createNode(value, ctx.wrapScalars, null, ctx);
    return new resolveSeq.Pair(k, v);
  }

}

PlainValue._defineProperty(Schema, "defaultPrefix", PlainValue.defaultTagPrefix);

PlainValue._defineProperty(Schema, "defaultTags", PlainValue.defaultTags);

exports.Schema = Schema;