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Current File : //data/old/usr/lib/node_modules/hexo/node_modules/nunjucks/src/lib.js

'use strict';

var ArrayProto = Array.prototype;
var ObjProto = Object.prototype;
var escapeMap = {
  '&': '&',
  '"': '"',
  '\'': ''',
  '<': '&lt;',
  '>': '&gt;'
};
var escapeRegex = /[&"'<>]/g;

var _exports = module.exports = {};

function hasOwnProp(obj, k) {
  return ObjProto.hasOwnProperty.call(obj, k);
}

_exports.hasOwnProp = hasOwnProp;

function lookupEscape(ch) {
  return escapeMap[ch];
}

function _prettifyError(path, withInternals, err) {
  if (!err.Update) {
    // not one of ours, cast it
    err = new _exports.TemplateError(err);
  }

  err.Update(path); // Unless they marked the dev flag, show them a trace from here

  if (!withInternals) {
    var old = err;
    err = new Error(old.message);
    err.name = old.name;
  }

  return err;
}

_exports._prettifyError = _prettifyError;

function TemplateError(message, lineno, colno) {
  var err;
  var cause;

  if (message instanceof Error) {
    cause = message;
    message = cause.name + ": " + cause.message;
  }

  if (Object.setPrototypeOf) {
    err = new Error(message);
    Object.setPrototypeOf(err, TemplateError.prototype);
  } else {
    err = this;
    Object.defineProperty(err, 'message', {
      enumerable: false,
      writable: true,
      value: message
    });
  }

  Object.defineProperty(err, 'name', {
    value: 'Template render error'
  });

  if (Error.captureStackTrace) {
    Error.captureStackTrace(err, this.constructor);
  }

  var getStack;

  if (cause) {
    var stackDescriptor = Object.getOwnPropertyDescriptor(cause, 'stack');

    getStack = stackDescriptor && (stackDescriptor.get || function () {
      return stackDescriptor.value;
    });

    if (!getStack) {
      getStack = function getStack() {
        return cause.stack;
      };
    }
  } else {
    var stack = new Error(message).stack;

    getStack = function getStack() {
      return stack;
    };
  }

  Object.defineProperty(err, 'stack', {
    get: function get() {
      return getStack.call(err);
    }
  });
  Object.defineProperty(err, 'cause', {
    value: cause
  });
  err.lineno = lineno;
  err.colno = colno;
  err.firstUpdate = true;

  err.Update = function Update(path) {
    var msg = '(' + (path || 'unknown path') + ')'; // only show lineno + colno next to path of template
    // where error occurred

    if (this.firstUpdate) {
      if (this.lineno && this.colno) {
        msg += " [Line " + this.lineno + ", Column " + this.colno + "]";
      } else if (this.lineno) {
        msg += " [Line " + this.lineno + "]";
      }
    }

    msg += '\n ';

    if (this.firstUpdate) {
      msg += ' ';
    }

    this.message = msg + (this.message || '');
    this.firstUpdate = false;
    return this;
  };

  return err;
}

if (Object.setPrototypeOf) {
  Object.setPrototypeOf(TemplateError.prototype, Error.prototype);
} else {
  TemplateError.prototype = Object.create(Error.prototype, {
    constructor: {
      value: TemplateError
    }
  });
}

_exports.TemplateError = TemplateError;

function escape(val) {
  return val.replace(escapeRegex, lookupEscape);
}

_exports.escape = escape;

function isFunction(obj) {
  return ObjProto.toString.call(obj) === '[object Function]';
}

_exports.isFunction = isFunction;

function isArray(obj) {
  return ObjProto.toString.call(obj) === '[object Array]';
}

_exports.isArray = isArray;

function isString(obj) {
  return ObjProto.toString.call(obj) === '[object String]';
}

_exports.isString = isString;

function isObject(obj) {
  return ObjProto.toString.call(obj) === '[object Object]';
}

_exports.isObject = isObject;
/**
 * @param {string|number} attr
 * @returns {(string|number)[]}
 * @private
 */

function _prepareAttributeParts(attr) {
  if (!attr) {
    return [];
  }

  if (typeof attr === 'string') {
    return attr.split('.');
  }

  return [attr];
}
/**
 * @param {string}   attribute      Attribute value. Dots allowed.
 * @returns {function(Object): *}
 */


function getAttrGetter(attribute) {
  var parts = _prepareAttributeParts(attribute);

  return function attrGetter(item) {
    var _item = item;

    for (var i = 0; i < parts.length; i++) {
      var part = parts[i]; // If item is not an object, and we still got parts to handle, it means
      // that something goes wrong. Just roll out to undefined in that case.

      if (hasOwnProp(_item, part)) {
        _item = _item[part];
      } else {
        return undefined;
      }
    }

    return _item;
  };
}

_exports.getAttrGetter = getAttrGetter;

function groupBy(obj, val, throwOnUndefined) {
  var result = {};
  var iterator = isFunction(val) ? val : getAttrGetter(val);

  for (var i = 0; i < obj.length; i++) {
    var value = obj[i];
    var key = iterator(value, i);

    if (key === undefined && throwOnUndefined === true) {
      throw new TypeError("groupby: attribute \"" + val + "\" resolved to undefined");
    }

    (result[key] || (result[key] = [])).push(value);
  }

  return result;
}

_exports.groupBy = groupBy;

function toArray(obj) {
  return Array.prototype.slice.call(obj);
}

_exports.toArray = toArray;

function without(array) {
  var result = [];

  if (!array) {
    return result;
  }

  var length = array.length;
  var contains = toArray(arguments).slice(1);
  var index = -1;

  while (++index < length) {
    if (indexOf(contains, array[index]) === -1) {
      result.push(array[index]);
    }
  }

  return result;
}

_exports.without = without;

function repeat(char_, n) {
  var str = '';

  for (var i = 0; i < n; i++) {
    str += char_;
  }

  return str;
}

_exports.repeat = repeat;

function each(obj, func, context) {
  if (obj == null) {
    return;
  }

  if (ArrayProto.forEach && obj.forEach === ArrayProto.forEach) {
    obj.forEach(func, context);
  } else if (obj.length === +obj.length) {
    for (var i = 0, l = obj.length; i < l; i++) {
      func.call(context, obj[i], i, obj);
    }
  }
}

_exports.each = each;

function map(obj, func) {
  var results = [];

  if (obj == null) {
    return results;
  }

  if (ArrayProto.map && obj.map === ArrayProto.map) {
    return obj.map(func);
  }

  for (var i = 0; i < obj.length; i++) {
    results[results.length] = func(obj[i], i);
  }

  if (obj.length === +obj.length) {
    results.length = obj.length;
  }

  return results;
}

_exports.map = map;

function asyncIter(arr, iter, cb) {
  var i = -1;

  function next() {
    i++;

    if (i < arr.length) {
      iter(arr[i], i, next, cb);
    } else {
      cb();
    }
  }

  next();
}

_exports.asyncIter = asyncIter;

function asyncFor(obj, iter, cb) {
  var keys = keys_(obj || {});
  var len = keys.length;
  var i = -1;

  function next() {
    i++;
    var k = keys[i];

    if (i < len) {
      iter(k, obj[k], i, len, next);
    } else {
      cb();
    }
  }

  next();
}

_exports.asyncFor = asyncFor;

function indexOf(arr, searchElement, fromIndex) {
  return Array.prototype.indexOf.call(arr || [], searchElement, fromIndex);
}

_exports.indexOf = indexOf;

function keys_(obj) {
  /* eslint-disable no-restricted-syntax */
  var arr = [];

  for (var k in obj) {
    if (hasOwnProp(obj, k)) {
      arr.push(k);
    }
  }

  return arr;
}

_exports.keys = keys_;

function _entries(obj) {
  return keys_(obj).map(function (k) {
    return [k, obj[k]];
  });
}

_exports._entries = _entries;

function _values(obj) {
  return keys_(obj).map(function (k) {
    return obj[k];
  });
}

_exports._values = _values;

function extend(obj1, obj2) {
  obj1 = obj1 || {};
  keys_(obj2).forEach(function (k) {
    obj1[k] = obj2[k];
  });
  return obj1;
}

_exports._assign = _exports.extend = extend;

function inOperator(key, val) {
  if (isArray(val) || isString(val)) {
    return val.indexOf(key) !== -1;
  } else if (isObject(val)) {
    return key in val;
  }

  throw new Error('Cannot use "in" operator to search for "' + key + '" in unexpected types.');
}

_exports.inOperator = inOperator;

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