basant307/AI_Governance_Project

1'use strict';2 3 4module.exports = {5  copy: copy,6  checkDataType: checkDataType,7  checkDataTypes: checkDataTypes,8  coerceToTypes: coerceToTypes,9  toHash: toHash,10  getProperty: getProperty,11  escapeQuotes: escapeQuotes,12  equal: require('fast-deep-equal'),13  ucs2length: require('./ucs2length'),14  varOccurences: varOccurences,15  varReplace: varReplace,16  schemaHasRules: schemaHasRules,17  schemaHasRulesExcept: schemaHasRulesExcept,18  schemaUnknownRules: schemaUnknownRules,19  toQuotedString: toQuotedString,20  getPathExpr: getPathExpr,21  getPath: getPath,22  getData: getData,23  unescapeFragment: unescapeFragment,24  unescapeJsonPointer: unescapeJsonPointer,25  escapeFragment: escapeFragment,26  escapeJsonPointer: escapeJsonPointer27};28 29 30function copy(o, to) {31  to = to || {};32  for (var key in o) to[key] = o[key];33  return to;34}35 36 37function checkDataType(dataType, data, strictNumbers, negate) {38  var EQUAL = negate ? ' !== ' : ' === '39    , AND = negate ? ' || ' : ' && '40    , OK = negate ? '!' : ''41    , NOT = negate ? '' : '!';42  switch (dataType) {43    case 'null': return data + EQUAL + 'null';44    case 'array': return OK + 'Array.isArray(' + data + ')';45    case 'object': return '(' + OK + data + AND +46                          'typeof ' + data + EQUAL + '"object"' + AND +47                          NOT + 'Array.isArray(' + data + '))';48    case 'integer': return '(typeof ' + data + EQUAL + '"number"' + AND +49                           NOT + '(' + data + ' % 1)' +50                           AND + data + EQUAL + data +51                           (strictNumbers ? (AND + OK + 'isFinite(' + data + ')') : '') + ')';52    case 'number': return '(typeof ' + data + EQUAL + '"' + dataType + '"' +53                          (strictNumbers ? (AND + OK + 'isFinite(' + data + ')') : '') + ')';54    default: return 'typeof ' + data + EQUAL + '"' + dataType + '"';55  }56}57 58 59function checkDataTypes(dataTypes, data, strictNumbers) {60  switch (dataTypes.length) {61    case 1: return checkDataType(dataTypes[0], data, strictNumbers, true);62    default:63      var code = '';64      var types = toHash(dataTypes);65      if (types.array && types.object) {66        code = types.null ? '(': '(!' + data + ' || ';67        code += 'typeof ' + data + ' !== "object")';68        delete types.null;69        delete types.array;70        delete types.object;71      }72      if (types.number) delete types.integer;73      for (var t in types)74        code += (code ? ' && ' : '' ) + checkDataType(t, data, strictNumbers, true);75 76      return code;77  }78}79 80 81var COERCE_TO_TYPES = toHash([ 'string', 'number', 'integer', 'boolean', 'null' ]);82function coerceToTypes(optionCoerceTypes, dataTypes) {83  if (Array.isArray(dataTypes)) {84    var types = [];85    for (var i=0; i<dataTypes.length; i++) {86      var t = dataTypes[i];87      if (COERCE_TO_TYPES[t]) types[types.length] = t;88      else if (optionCoerceTypes === 'array' && t === 'array') types[types.length] = t;89    }90    if (types.length) return types;91  } else if (COERCE_TO_TYPES[dataTypes]) {92    return [dataTypes];93  } else if (optionCoerceTypes === 'array' && dataTypes === 'array') {94    return ['array'];95  }96}97 98 99function toHash(arr) {100  var hash = {};101  for (var i=0; i<arr.length; i++) hash[arr[i]] = true;102  return hash;103}104 105 106var IDENTIFIER = /^[a-z$_][a-z$_0-9]*$/i;107var SINGLE_QUOTE = /'|\\/g;108function getProperty(key) {109  return typeof key == 'number'110          ? '[' + key + ']'111          : IDENTIFIER.test(key)112            ? '.' + key113            : "['" + escapeQuotes(key) + "']";114}115 116 117function escapeQuotes(str) {118  return str.replace(SINGLE_QUOTE, '\\$&')119            .replace(/\n/g, '\\n')120            .replace(/\r/g, '\\r')121            .replace(/\f/g, '\\f')122            .replace(/\t/g, '\\t');123}124 125 126function varOccurences(str, dataVar) {127  dataVar += '[^0-9]';128  var matches = str.match(new RegExp(dataVar, 'g'));129  return matches ? matches.length : 0;130}131 132 133function varReplace(str, dataVar, expr) {134  dataVar += '([^0-9])';135  expr = expr.replace(/\$/g, '$$$$');136  return str.replace(new RegExp(dataVar, 'g'), expr + '$1');137}138 139 140function schemaHasRules(schema, rules) {141  if (typeof schema == 'boolean') return !schema;142  for (var key in schema) if (rules[key]) return true;143}144 145 146function schemaHasRulesExcept(schema, rules, exceptKeyword) {147  if (typeof schema == 'boolean') return !schema && exceptKeyword != 'not';148  for (var key in schema) if (key != exceptKeyword && rules[key]) return true;149}150 151 152function schemaUnknownRules(schema, rules) {153  if (typeof schema == 'boolean') return;154  for (var key in schema) if (!rules[key]) return key;155}156 157 158function toQuotedString(str) {159  return '\'' + escapeQuotes(str) + '\'';160}161 162 163function getPathExpr(currentPath, expr, jsonPointers, isNumber) {164  var path = jsonPointers // false by default165              ? '\'/\' + ' + expr + (isNumber ? '' : '.replace(/~/g, \'~0\').replace(/\\//g, \'~1\')')166              : (isNumber ? '\'[\' + ' + expr + ' + \']\'' : '\'[\\\'\' + ' + expr + ' + \'\\\']\'');167  return joinPaths(currentPath, path);168}169 170 171function getPath(currentPath, prop, jsonPointers) {172  var path = jsonPointers // false by default173              ? toQuotedString('/' + escapeJsonPointer(prop))174              : toQuotedString(getProperty(prop));175  return joinPaths(currentPath, path);176}177 178 179var JSON_POINTER = /^\/(?:[^~]|~0|~1)*$/;180var RELATIVE_JSON_POINTER = /^([0-9]+)(#|\/(?:[^~]|~0|~1)*)?$/;181function getData($data, lvl, paths) {182  var up, jsonPointer, data, matches;183  if ($data === '') return 'rootData';184  if ($data[0] == '/') {185    if (!JSON_POINTER.test($data)) throw new Error('Invalid JSON-pointer: ' + $data);186    jsonPointer = $data;187    data = 'rootData';188  } else {189    matches = $data.match(RELATIVE_JSON_POINTER);190    if (!matches) throw new Error('Invalid JSON-pointer: ' + $data);191    up = +matches[1];192    jsonPointer = matches[2];193    if (jsonPointer == '#') {194      if (up >= lvl) throw new Error('Cannot access property/index ' + up + ' levels up, current level is ' + lvl);195      return paths[lvl - up];196    }197 198    if (up > lvl) throw new Error('Cannot access data ' + up + ' levels up, current level is ' + lvl);199    data = 'data' + ((lvl - up) || '');200    if (!jsonPointer) return data;201  }202 203  var expr = data;204  var segments = jsonPointer.split('/');205  for (var i=0; i<segments.length; i++) {206    var segment = segments[i];207    if (segment) {208      data += getProperty(unescapeJsonPointer(segment));209      expr += ' && ' + data;210    }211  }212  return expr;213}214 215 216function joinPaths (a, b) {217  if (a == '""') return b;218  return (a + ' + ' + b).replace(/([^\\])' \+ '/g, '$1');219}220 221 222function unescapeFragment(str) {223  return unescapeJsonPointer(decodeURIComponent(str));224}225 226 227function escapeFragment(str) {228  return encodeURIComponent(escapeJsonPointer(str));229}230 231 232function escapeJsonPointer(str) {233  return str.replace(/~/g, '~0').replace(/\//g, '~1');234}235 236 237function unescapeJsonPointer(str) {238  return str.replace(/~1/g, '/').replace(/~0/g, '~');239}240